Pontšo ea Dopamine ka boitšoaro bo amanang le moputso (2013)

Front Neural Circuits. 2013 Oct 11; 7: 152.

Baik JH.

mohloli o moholo

Laboraro la Neurobiology Laboraro, Lefapha la Saense ea Bophelo, Korea Seoul University, Korea Boroa.

inahaneloang

Dopamine (DA) e laola boits'oaro ba maikutlo le bo susumetsang ka tsela ea mesolimbic dopaminergic. Liphetoho ho li-neurotransication tsa DA li fumanoe ho fetola likarabo tsa boits'oaro lithutong tse fapaneng tsa tikoloho tse amanang le boits'oaro ba moputso. Psychostimulants, lithethefatsi tsa tlhekefetso, le moputso oa tlhaho joalo ka lijo li ka baka liphetoho tse kholo tsamaisong ea mesolimbic DA. Boithuto ba morao-rao bo sebelisang li-optogenetics le DREADD, hammoho le liphatsa tsa lefutso tse tobileng tsa "neuron" kapa potoloho e ikhethang li ntlafalitse kutloisiso ea rona ea ho supa lipalo tsa DA ka potoloho ea moputso, mme li fane ka mokhoa oa ho khetholla likarolo tse ka tlase tsa neural tsa boits'oaro bo thata joalo ka ts'ebeliso ea lithethefatsi le mathata a ho ja. Tlhahlobo ena e shebisisa karolo ea tsamaiso ea DA ho tšebeliso ea lithethefatsi le tšusumetso ea lijo, ka kakaretso ea karolo ea D1 le D2 receptors taolong ea boits'oaro bo amanang le moputso.

LINKOTSO:

dopamine, dopamine receptor, ho lemalla lithethefatsi, moputso oa lijo, potoloho ea moputso

SELELEKELA

Dopamine (DA) ke "catecholamine neurotransmitter" e hlahelletseng bokong, mme e hlophisitsoe ke mesencephalic neurons sebakeng sa substantia nigra (SN) le sebakeng sa ventral tegmental (VTA). Li-neuron tsa DA li hlahile ka har'a li-nuclei tsena mme li thusa ho striatum, cortex, system ea limbic le hypothalamus. Ka litselana tsena, DA e ama mesebetsi e mengata ea 'mele, joalo ka taolo ea metsamao e hokahaneng le secretion ea li-hormone, hammoho le boits'oaro bo susumetsoang le boikutlong (Hornykiewicz, 1966; Beaulieu le Gainetdinov, 2011; Tritsch le Sabatini, 2012).

Taolo ea tsamaiso ea DA maemong a amanang le moputso e amohetse tlhokomelo e kholo ka lebaka la litlamorao tse mpe tsa ho se sebetse hantle potolohong ena, joalo ka tšebeliso ea lithethefatsi le moputso oa lijo tse amanang le botena, tseo ka bobeli e leng litaba tse kholo tsa bophelo bo botle ba sechaba. Hona joale ho amoheloe hantle hore ho pepesehela khafetsa ho lintho tse lemalloang, liphetoho tse feto-fetohang li etsahala maemong a limolek'hule le a cellular tseleng ea mesolimbic ea DA, e ikarabellang bakeng sa taolo ea boitšoaro bo susumetsang le bakeng sa tlhophiso ea boits'oaro ba maikutlo le maemo (Nestler le Carlezon, 2006; Steketee le Kalivas, 2011). Liphetoho tsena tseleng ea mesolimbic ho nahanoa hore li lebisa ho ts'ebeliso ea lithethefatsi, e leng bokuli bo sa feleng bo khutlang moo boitšoaro bo matla ba ho ts'oara lithethefatsi le ho sebelisa lithethefatsi bo phehellang leha ho na le litlamorao tse mpe tse mpe.s (Thomas et al., 2008).

Liphumano tsa morao-rao li bonts'a hore marang-rang a glutamatergic le GABAergic synaptic tsamaisong ea limbic le tsona li anngoe ke lithethefatsi tsa tlhekefetso, le hore sena se ka fetola litlamorao tsa boits'oaro ba lithethefatsi tse lemalloang. (Schmidt le Pierce, 2010; Lüscher le Malenka, 2011). Cbopaki bo fumanehang hona joale bo fana ka maikutlo a hore liphetoho tse matla tsa synaptic tsa sisteme ea mesolimbic DA ha e amane feela le melemo e tlisoang ke psychostimulants le lithethefatsi tse ling tsa tlhekefetso, empa le litlamorao tsa moputso oa tlhaho, joalo ka lijo; leha ho le joalo, mochine o sebelisang lithethefatsi tsa tlhekefetso ho matlafatsang matla a fetohang a potoloho ena. Ebile, ho supa moputso oa DA ho bonahala e le ntho e thata haholo, hape ho bohlokoa mesebetsing ea ho ithuta le maemo, joalo ka ha ho netefalitsoe ke lithuto tse senolang karabelo ea DAergic e fositseng phoso ea ho profeta ho ithuteng ka boits'oaro, mohlala (Bohlale, 2004; Schultz, 2007, 2012), ka hona ho fana ka maikutlo a tlhokeho ea karohano e ntle sethaleng ho utloisisa hantle mekhoa ena e susumetsoang e amanang le moputso. Boithuto ba morao-rao bo sebelisang li-optogenetics le li-genon tse ikhethang kapa tse ikhethang tse amanang le liphatsa tsa lefutso li se li lumella kutloisiso e ntlafatsang ea ho supa ha DA ho potolohong ea moputso.

Thutong ena, ke tla fana ka kakaretso e khuts'oane ea letšoao la DA ho boits'oaro bo amanang le moputso, ka kakaretso ea lithuto tse entsoeng morao tjena mabapi le boitšoaro ba ho lemalla koae hammoho le tse ling ka moputso oa lijo maemong a karolo ea karolo ea D1 le li-receptor tsa D2 ho laola. boits'oaro bona.

LIEKETSO DOPAMINE

Dopamine e hokahana le li-membrane receptors tsa lelapa la li-domain tse supileng tsa transmembrane G-protein tse kopantsoeng, ka ts'ebetso e lebisang ho thehoeng ha man messengersosa a bobeli, le ts'ebetso kapa khatello ea litsela tse ikhethang tse saeneng. Ho fihla joale, li-subtypes tse hlano tse fapaneng tsa li-receptor tsa DA li entsoe ka mefuta e fapaneng. Ho ipapisitsoe le thepa ea bona ea sebopeho le ea meriana, ho arotsoe likarolo tse peli ka bongata: li-receptors tsa D1 tse kang li-receptors tse tsosang takatso ea cAMP, e kenyeletsang D1 (Ratehang et al., 1990; Zhou et al., 1990) le D5 (Grandy et al., 1991; Sunahara et al., 1991), le li-receptor tse kang D2, tse thibelang maemo a cAMP a makatsang, a nang le D2 (Bunzow et al., 1988; Dal Toso et al., 1989), D3 (Sokoloff et al., 1990), le D4 (Van Tol et al., 1991) li-receptors.

Li-receptor tsa D1 le D2 ke li-receptor tse hlalositsoeng ka ho fetisisa ho DA bokong. Receptor ea D2 e na le li-isoforms tse peli tse hlahisoang ke splicing e 'ngoe ea mofuta o tšoanang (Dal Toso et al., 1989; Montmayeur et al., 1991). Tsena ke li-isoforms, tse bitsoang D2L le D2S, li tšoana ntle le ho kenngoa ha li-amino tsa 29 tse teng setulong sa boraro sa boteng sa D2L, sebaka sa marang-rang se nahanang ho bapala karolo ea ho kopanya sehlopha sena sa li-receptor ho man secondosa a mang a bobeli.

Li-receptor tsa D2 li fumaneha moo pele, e senotsoe ke D2 receptor immunoreactivity, mRNA, le libaka tse tlamang tse teng li-neuron tsa DA ho pholletsa le midbrain (Sesack et al., 1994), ka boemo bo tlase ba polelo ea li-receptor ea D2 hoVTA ho feta SN (Haber et al., 1995). Tsena li-autoreceptors tsa mofuta oa D2 li emela li-somatodendritic autoreceptors, tse tsejoang ka ho ferekanya neuronal excitability (Lacey et al., 1987, 1988; Chiodo le Kapatos, 1992), kapa li-terminal autoreceptors, whin haholo fokotsa theoha synthesis le liphutheloana tsa DA (Onali et al., 1988; Pothos et al., 1998), empa hape e thibela ho lokolloa ha ts'epahalo ho DA (Cass le Zahniser, 1991; Kennedy et al., 1992; Congar et al., 2002). Ka hona, karolo e ka sehloohong ea li-autoreceptor tsena ke ho thibela le ho feto-fetoha ha methapo ea kelello ea DA ka kakaretso; leha ho le joalo, ho kile ha boleloa hore mokhatlong oa embryonic, D2-mofuta oa Autoreceptor o ka ba le ts'ebetso e fapaneng ho nts'etsopele ea neuronal ea DA (Kim et al., 2006, 2008; Yoon et al., 2011; Yoon le Baik, 2013). Kahoo, karolo ea cellular le ea limolek'hule tsa li-receptors tsa D2 tsa presynaptic e hloka ho hlahlojoa ho ea pele. Polelo ea D3, D4, le D5 receptors bokong e fokotsoe haholo ebile e fokola ho feta ea li-receptor tsa D1 kapa D2.

Ho na le phapang e atamelaneng ea DA ho li-receptors tse kang D1 le li-receptors tsa D2, tse tlalehiloeng haholo ka motheong oa lithuto tsa receptor-ligand tse tlamang tse sebelisang li-receptors tse hlalositsoeng ke heterologously tse hlalosang li-receptors tsa DA maemong a sele. Mohlala, li-receptor tse kang D2-ekare li na le 10- ho ea 100-fold tse kholo ho DA ho feta lelapa la D1 joalo ka D1 receptor e tlaleha hore e na le kamano e tlase haholo ho DA (Beaulieu le Gainetdinov, 2011; Tritsch le Sabatini, 2012). Liphapang tsena li bonts'a karolo e fapaneng bakeng sa li-receptor tse peli tse fuoeng hore li-neurons tsa DA li ka ba le lipaterone tse peli tse fapaneng tsa tokollo ea DA, "tonic" kapa "phasic" ho latela thepa ea bona ea ho thunya (Mohau et al., 2007). Ho 'nile ha fanoa ka tlhahiso ea hore khafetsa e tlase, ho thunya ho sa lekanyetsoang ha li-neurons tsa DA ka tsela e fapaneng ho hlahisa boemo bo tlase bo tlase ba DA ea kantle ho naha (Mohau et al., 2007), ha mosebetsi oa ho phatloha ho hoholo, kapa ts'ebetso ea "phasic" o itšetleha haholo ka tlatsetso e kopanetsoeng, 'me ho lumeloa hore ke lets'oao le sebetsang le romelletsoeng libakeng tsa postynaptic ho supa moputso le boitšoaro bo tataisoang ke sepheo (Berridge le Robinson, 1998; Schultz, 2007; Mohau et al., 2007). Ka hona, ts'ebetso e phatlohang ea li-neuron tsa DA, e lebisang keketseho ea nakoana ho boemo ba DA, ho nahanoa hore ke karolo ea bohlokoa mokokotlong oa meputso (Overton le Clark, 1997; Schultz, 2007). Ka lebaka leo, li-receptor tsa D1, tse tsejoang ka hore ke tse amanang le tumellano e tlase ea DA, ho nahanoa hore e hlohlelletsoa ka mokhoa o ikhethileng ke maemo a makhaola-khang a phahameng a DA a kopantsoeng ke phasic e phatlohileng ea li-neuron tsa DA (Goto le Mohau, 2005; Mohau et al., 2007). Ka lehlakoreng le leng, ho nahanoa hore li-receptor tse kang D2, tse tsejoang hore li na le tumellano e phahameng ho DA, li ka bona maemo a tlase a tokollo ea tonic DA (Goto et al., 2007). Leha ho le joalo, ka lebaka la hore litekanyo tsa "receptor" tse amanang le tumellano ea "receptor" li itšetleha ka lipallo tse tlamang tse tsoang ho li-receptor tse hlalositsoeng ke DA, 'me li sa bonts'e bokhoni ba ho amohela li-receptor ho li-cascade tse oelang tlaase, ho thata ho fana ka maikutlo a hore na li-receptor tsa D2 li tšoana hantle le li-basal extracellular. DA Ka vivo. Kahoo, ho sa ntse ho tla hlakisoa hore na li-receptors tsena tse fapaneng li nka karolo joang tsamaisong e fapaneng ea tšebetso ea methapo ea DA Ka vivo.

HO FIHLELA MABAPA LITLHAKISO TSE FIHLOANG KE D1 LE D2 RECEPTORS

Li-receptor tsa D1- le D2-like receptor li fapana ka tsela e ikhethileng litseleng tseo ba li fetolang. Li-receptor tse kang D1, li kenyeletsa D1 le D5, li kopantsoe le liproteine ​​tsa heterotrimeric G tse nang le protheine ea G Gs le Gcyolf, le ts'ebetso e lebisang tšebetsong e eketsehileng ea adenylyl cyclase (AC), le keketseho ea cyclic adenosine monophosphate (cAMP) tlhahison. Tsela ena e tsenya ts'ebetso ea protheine kinase A (PKA), e lebisang ho phosphorylation ea substrates tse feto-fetohang le ho kenngoa ha polelo ea pele ea gene, hammoho le ho feto-fetoha ha liteishene tse ngata tsa ion. Ka papiso, Li-receptor tsa D2 tsa sehlopha sa DA (D2, D3, le D4) li kopantsoe le Gcyi le Gcyo liprotheine, le nKa mohlala laola ka nepo tlhahiso ea cAMP, e bakang ho fokotseha ha ts'ebetso ea PKA, ts'ebetso ea K+ liteishene, le modumo ea liteishene tse ling tsa ion (Kebabian le Greengard, 1971; Kebabian le Calne, 1979; E tsamaisang hampe al al., 1998; Beaulieu le Gainetdinov, 2011).

E 'ngoe ea likarolo tse ithutoang hamolemo tsa PKA ke phosphoprotein e tsamaeang ka ho fetisisa ho DA- le cAMP, Mong ~ 32,000 (DARPP-32), e thibelang protheine phosphatase,' me e hlahisoa haholo ke li-spiny neurons tse mahareng (MSNs) tsa striatum (Hemmings et al., 1984a). Ho bonahala eka DARPP-32 e sebetsa e le setsi sa ho kenella ho fetoleng hoa ho saena hoa sele ho arabelang DA ho li-neurons tsa striatal. Ho bontšitsoe hore phosphorylation ea DARPP-32 ho threonine 34 ke PKA activates inhibitory function ea DARPP-32 holim 'a protheine ea phosphatase (PP1; Hemmings et al., 1984a,b). Ho D1 receptor e hlalosang li-neurons tsa striatal, li-receptor tsa D1 li nyolla phosphorylation ea DARPP-32 ha e arabela ts'ebetsong ea PKA, ha ts'usumetso ea li-receptor tsa D2 tse amanang le D2 receptor-receptors e buang ka D32 receptor-receptor e buang ka D34 e fokotsa phosphorylation ea DARPPX. sephetho sa ts'ebetso ea PKA e fokotsehileng (Bateup et al., 2008). Leha ho le joalo, ho bonahala eka tsela e ikemetseng ea cAMP e boetse e nka karolo ho D2-receptor-mediated regulation of DARPP-32, ka lebaka la dephosphorylation ea threonine 34 ke phodhatase e itšetlehileng ka protodulin e itšetlehileng ka protodulin e itšetlehileng ka "protein" eo hape e bitsoang calcineurin, eo hape e bitsoang calcineurin e hlahisoa ke intracellular e eketsehileng ea Ca2+E latelang ts'ebetso ea li-receptor tsa D2 (Nishi et al., 1997). Liphumano tsena li fana ka maikutlo a hore DA e fana ka taolo ea taelo e mabapi le boemo ba phosphorylation ea DARPP-32, molek'hule ea saekanyetso ea DA. Ka hona, motho a ka nahana hore ka kakaretso, tlasa molumo oa DA, litsela tsena tse tšoaeang liphoso tse tataisang lihlopha tse peli tsa li-receptors li ka susumetsa thabo ea neuronal, ka hona, polasetiki ea synaptic, ho latela li-network tsa li-synaptic bokong, ha li fuoa hore ho saena ha tsona ka nepo ho fapana ho latela mofuta oa sele le bokong bo hlahisitsoeng moo (Beaulieu le Gainetdinov, 2011; Girault, 2012).

Maemong a li-receptor tsa D2, boemo bo thatafala le ho feta, kaha li-receptor tsa D2 li ngotsoe ka tsela e 'ngoe, e fana ka isoforms e nang le thepa e ikhethang ea' mele le li-subisellular subizellular. Isoform e kholo e bonahala e bonts'oa haholo libakeng tsohle tsa boko, leha boholo ba li-isoforms tse peli bo ka fapana (Montmayeur et al., 1991). Ha e le hantle, phenotype ea litoeba tsa D2 receptor total knockout (KO) e fumanoe e fapane haholo le ea litoeba tsa D2L KO (Baik et al., 1995; Usiello et al., 2000), ho bontša hore isoformsmight e na le mesebetsi e fapaneng Ka vivo. Liphetho tsa morao-rao tse tsoang Moyer et al. (2011) ts'ehetsa phapang Ka vivo Ts'ebetso ea li-isoforms tsa D2 bokong ba motho, e bonts'a karolo ea mefuta e 'meli ea D2 receptor gene e nang le interior single-nucleotide polymorphisms (SNPs) ho D2 receptortern splicing, le mokhatlo oa liphatsa tsa lefutso pakeng tsa SNPs le tlhekefetso ea koae ho Caucasians (Moyer et al., 2011; Gorwood et al., 2012).

LITLHAHISO TSA BOPHELO TSA DA-MEDIATED

Tsela e 'ngoe e tšoaeang thahasello e khethehileng ho li-neuron ke li-kinases tsa activation tsa minogen-activated extracellular-signal regated kinases (ERK), tse hlahisoang ke D1 le D2 receptors. Hona joale ho amoheloa ka bophara hore ts'ebetso ea ERK e kenya letsoho likarabo tse fapaneng tsa 'mele ho li-neuron, joalo ka lefu la sele le nts'etsopele, hammoho le polasetiki ea synaptic, le hore ho feto-fetoha ha mosebetsi oa ERK ho CNS ho ka baka likarabo tse fapaneng tsa li-neurophysiological (Chang le Karin, 2001; Sweatt, 2004; Thomas le Huganir, 2004). Ho kenyelletsa moo, ts'ebetso ea ERK e ka laoloa ke lits'ebetso tse fapaneng tsa li-neurotransmitter, e leng mohato o ka rarahaneng empa o hlophisoa hantle ho latela melao e arohaneng ea litsela tse saenneng tse arolelanoang ke li-neurotransmitters tse fapaneng. Ka hona, hoa thabisa ho bona hore na tlhahiso ea 'mele ea tlhahiso ea ERK e bontšang ho susumetsoa ke DA ka li-receptors tsena e tla ba efe.

Liphetho tse fumanoeng ho tsoa litsamaisong tsa setso sa heterologous li fana ka maikutlo a hore li-receptor tsa D1- le D2 tsa sehlopha sa DA li ka laola ERK1 le 2 (Choi et al., 1999; Beom et al., 2004; Chen le al., 2004; Kim et al., 2004; Wang et al., 2005). Ho bina ha DKNUMX receptor-Mediated ERK ho kenyelletsa ho sebelisana le NMDA glutamtate receptor (Valjent et al., 2000, 2005), e 'nileng ea hlalosoa ka mokhoa o tebileng ho striatum. Ho susumetsa ha li-receptor tsa D1 ha e khone ho kopanya phosphorylation ka boeona, empa ho e-na le hoo ho hloka glutamate ea endo native (Pascoli et al., 2011). Ka ts'ebetso ea li-receptor ea D1, activated PKA e ka kopanya phosphorylation ea DARPP-32 ho Thr-34 ea eona, joalo ka ha ho boletsoe kaholimo. Phosphorylated DARPP-32 e ka sebetsa e le inhibitor e kholo ea protheine ea phosphatase PP-1, e bonts'ang phosphatase e 'ngoe, e' ngoe e ntlafalitsoeng ke tyrosine phosphatase (STEP). Dephosphorylation ea STEP e kenya ts'ebetsong ts'ebetso ea eona ea phosphatase, ka hona e lumella STEP ho dephosphorylate ERK (Paul et al., 2003). DARPP-32 e sebetsa le ho nyoloha ha ERK, mohlomong ka ho thibela PP-1, e thibela PP-1 ho dephosphorylating MEK, kinase e ka holimo ea ERK (Valjent et al., 2005). Ka hona, ts'ebetso ea li-receptor ea D1 e sebetsa ho eketsa phosphorylation ea ERK ka ho thibela ho senyeha ha eona ka STEP, empa hape ka ho thibela dephosphorylation ea kinase e nyolohang ea ERK. Ntle le moo, puo ea sefapano lipakeng tsa D1 le li-receptors tsa NMDA li kenya letsoho ts'ebetsong ea ERK. Mohlala, phuputso ea morao-rao e bonts'itse hore ts'usumetso ea li-receptor tsa D1 e eketsa matla a calcium ka li-receptor tsa NMDA, ketso e kenyelletsang phosphorylation ea NMDA receptor NR2B subunit ke Src-lelapa tyrosine kinase (Pascoli et al., 2011). Ts'ebetso ena ea calcium e eketsehang e etsa hore ho be le litsela tse ngata tse tšoaeang, ho kenyeletsoa calcium le kagodulin e itšetlehileng ka k'homphieutha, e ka hlahisang ERK ka Cascade ea Ras-Raf-MEK (Fasano et al., 2009; Shiflett le Balleine, 2011; Girault, 2012). Ka lebaka leo, ts'ebetso ea li-receptor tsa D1 tsa DXNUMX li sebelisa molaoana o rarahaneng ka li-phosphatases le kinase ho tlatselletsa puong ea sefapano ka lets'oao la "glutamate receptor signaling"Figure Figure11).

Tšoantšiso 1   

D1 receptor-Mediated activation ea ERK e tšoaeang tsela. Ho bina ha li-D1 receptor-Mediated ERK ho kenyelletsa ho sebelisana le NMDA glutamtate receptor (bona mongolo), o hlahisoang haholo ka har'a striatum. Ho susumetsoa ke li-receptors tsa D1 ha ho khonehe ...

D2 ts'ebetso ea li-receptor-mediated ea ERK e tlalehiloe lits'ebetsong tsa setso sa heterologous (Luo et al., 1998; Welsh et al., 1998; Choi et al., 1999). D2 ts'ebetso ea li-receptor-mediated ea ERK e fumanoe e itšetlehile ka Gcyi coupling protein, mme ho bonahala eka ho hlokahala hore ho fetisoe ha receptor tyrosine kinase, e sebetsang ka ho phahamisa lets'oao ho theosetsa ho etsa hore ERK e qale ho sebetsa (Choi et al., 1999; Kim et al., 2004; Wang et al., 2005; Yoon et al., 2011; Yoon le Baik, 2013). Arrestin e boetse e khothalelitsoe ho kenya letsoho ts'ebetsong ea D2 receptor-Mediated ERK (Beom et al., 2004; Kim et al., 2004), e ka hlahisang tumellano ea MAPK ka ho bokella li-endocytosis tse tsamaeang ka methati ka tsela e itšetlehileng ka β-bindin / dynamin (Kim et al., 2004). Monyetla o mong oa hore D2 receptorscoupling ho liprotheine tsa Gq o ke ke oa hlakoloa; ntlheng ena, ts'ebetso ea GK protein-mediated PKC e ka boela ea susumetsa ts'ebetso ea ERK (Choi et al., 1999; Figure Figure22).

Tšoantšiso 2   

D2 receptor-Mediated activation ea ERK e tšoaeang tsela. D2 ts'ebetso ea li-receptor-mediated ea ERK e itšetlehile ka Gcyi protein coupling. Ho bonahala hape hore ts'ebetso ea li-receptor-mediated tsa D2 e hloka transactivation ea receptor tyrosine kinase, ...

Ha u sheba karolo ea 'mele ea ho saena hoa li-receptor-mediated tsa DAK tsa DA, ho bontšitsoe hore ho mesencephalic neurons, DA e kenya ts'ebetso ERK ho supa ka li-receptors tsa mesencephalic D2, tseo ka tsona li hlahisang lintlha tse ngotsoeng joalo ka Nurr1 nts'etsopele ea li-neurons tsa DA (Kim et al., 2006). Ho feta moo, mosebetsi oa rona oa morao-rao o bonts'itse hore STEP kapa Wnt5a e ka kenya letsoho molaong ona, ka ho sebelisana le D2 receptors (Kim et al., 2008; Yoon et al., 2011). Ka lebaka la liphumano tsena, hoa makatsa hore na ho tšoaetsoa hona ho ka bapala karolo ea tšebetso ea methapo ea kutlo kelellong ea motho e moholo.

Leha ho le joalo, ka har'a dorsal striatum, tsamaiso ea "anti-psychotic D2-class receptor antagonist haloperidol" e khothalletsang phosphorylation ea ERK1 / 2, ha mokhoa oa ho itšireletsa oa kelello o sa reroang, eo hape e leng mofani oa maemo a XXXUMUMXXUMUMX. , e bontšang hore haloperidol le clozapine li etsa mekhoa e fapaneng ea phosphorylation ka har'a dorsal striatum (Pozzi et al., 2003). Ka hona, bohlokoa ba 'mele ba ho saena le ho emisa ha D2 receptor-mediated ERK bo lula e le bothata bo bulehileng.

Ha re e nka hammoho, ho hlakile hore li-receptors tsa D1and D2 li susumetsa ts'ebetso ea ERK ka mekhoa e ikhethileng, 'me motho a ka nahana hore ts'ebetso ea li-receptors tsena e ka ba le litlamorao tse fapaneng ho latela sebaka le boemo ba' mele ba li-neuron tse li hlalosang.

MOLEMO OA D1 LE BAHLOLO BA D2 HO DITLHAKISO TSE SEBETSOANG KE DIJENSI

Karolo ea li-receptor tsa D1 le D2 ka boits'ebetso bo amanang le moputso li fumanoe lipatlisiso ka mokhoa oa meriana ka ho sebelisa li-agonists tse ikhethileng le bahanyetsi, hammoho le tlhahlobo ea litoeba tsa receptor gene KO. Tsoelo-pele ea morao-rao ho li-optogenetics le tšebeliso ea livaerase tsa vaerase tse nang le liphatsa tsa lefutso tse fapaneng hona joale li lumella tlhahlobo e ntlafalitsoeng ea bohlokoa bo sebetsang ba li-receptor tsena Ka vivo (Lethathamo Lethathamo11).

Lethathamo 1   

Karolo ea li-dopamine D1 le li-receptor tsa D2 ka mekhoa e khothalletsoang ke koae.

TLHALOSO EA BOTSOALLE EA THOBALANO

Ho pepesehela psychostimulant e kang cocaine ho etsa hore motho a tsoelepele a be a matlafatsa tsoelo-pele ea phello ea matlafatso ea tšusumetso ea morao-rao, ketsahalo e tsejoang e le sensitization (Robinson le Berridge, 1993; Vanderschuren le Kalivas, 2000; Kalivas le Volkow, 2005; Steketee le Kalivas, 2011). Ts'ebetso ea maikutlo a boitšoaro e kenyelletsa likarolo tse peli tse ikhethileng; qalo le polelo. Mokhahlelo oa ho qala o bua ka nako eo karabelo e eketsehang ea boits'oaro e latelang taolo ea koae ka mehla e amanang le keketseho ea mahloriso a tsoang kantle ho DA. Boitšoaro ba boitšoaro bo ntse bo eketseha kamora ho felisoa ha taolo ea koae, mme ts'ebetso ena e hlahisa maikutlo a nako e telele, a tsejoang e le polelo ea maikutlo (Vanderschuren le Kalivas, 2000; Thomas et al., 2001; Steketee le Kalivas, 2011). Karolo ea polelo e tšoauoa ka karabelo e tsoelang pele ea lithethefatsi ka mor'a ho tlohela lithethefatsi, tse amanang le kotsi ea neuroadaptation (Kalivas le Duffy, 1990; Robinson le Berridge, 1993). Le ha ketsahalo ena e ithutile haholo ho liphoofolo tse lekang, ts'ebetso ea methapo ea kutlo e nang le ts'usumetso ea maikutlo e lumelloa e bonts'a li-neuroadaptations tse tlatsetsang ho hatelletseng litakatso tsa lithethefatsi ho batho (Robinson le Berridge, 1993; Kalivas le al., 1998). Ho 'nile ha fanoa ka tlhahiso ea hore tsamaiso ea mesolimbic DA ho tloha VTA ho ea bokong ba li-nucleus accumbens (NAc) le cortex ea pele ke mosireletsi oa bohlokoa oa liphetoho tsena tsa polasetiki, kamanong le "glutamatergic circry"Robinson le Berridge, 1993; Kalivas le al., 1998; Vanderschuren le Kalivas, 2000).

Liphoofolo li susumetsoa ka mokhoa oa boitšoaro cocaine, amphetamine, nikotine, kapa morphine (Kalivas le Duffy, 1990; Lipere le Toka, 1993) bonts'a tokollo ea DA e ntlafalitsoeng ho NAc ho arabela khahlisong ea lithethefatsi. Ntle le liphetoho tokollong ea neurotransmitter, DA e tlamang ho li-receptors tsa eona e bapala karolo ea bohlokoa ho boits'oarolo ba boitšoaro (Steketee le Kalivas, 2011). Mohlala, thabo e ntlafalitsoeng ea li-neurons tsa VTA DA tse etsahalang ka ho pepesetsoa khafetsa ha koae li amahanngoa le sensitivity ea D2 e fokotsehileng ea kutlo (Bosoeu le Wang, 1984; Henry et al., 1989). Ntle le moo, ente ea intra-VTA e pheta-phetoang ea litekanyetso tse tlase tsa D2 antagonist eticlopride, eo ho ka etsahalang hore ebe khetho ea autoreceptor-khetho, e ntlafalitsoeng ea likarabo tse latelang tsa amphetamine (Tanabe et al., 2004).

Boithuto bo bongata bo bontšitse hore li-receptors tsa D1 le D2 DA li kenya letsoho ka mokhoa o fapaneng phetohong e susumetsoang ke koae ke ts'ebetso ea locomotor. Mohlala, lithuto tsa pele tse sebelisang mekhoa ea litlhare e bontšitse hore litoeba kapa likhoto li kile tsa phekoloa ka D1 receptor antagonist SCH 23390 li bonts'itse karabelo ea locomotor ho phephetso e matla ea koae, athe D2 receptor antagonists haloperidol, le raclopride ha e na phello e joalo (Cabib et al., 1991; Ushijima et al., 1995; Hummel le Unterwald, 2002). Liphetho tsena li fana ka maikutlo a likarolo tse fapaneng tsa li-receptor tsa DA ho fetoleng liphetho tsa "cocaine" tse matlafatsang. Leha ho le joalo, mabapi le maikutlo a susumetsang a khothalletsoang ke li-cocaine tse pheta-phetoang, ho tlalehiloe hore tsamaiso ea methapo ea D1 receptor antagonist SCH23390, kapa D2 receptor antagonists sulpiride, YM-09151-2 kapa eticlopride, ha e ame ho kenella. sensitization ea koae (Kuribara le Uchihashi, 1993; Mattingly et al., 1994; Steketee, 1998; White et al., 1998; Vanderschuren le Kalivas, 2000).

Litlamorao tsa tsamaiso ea SCH23390 e kenang ka kotlolloho mabapi le tšebeliso ea koae, ho ts'oaroa ha moea le khetho ea sebaka (CPP) li fumanoe lipuong, 'me lithuto tsena li bonts'a hore ho ts'oaroa ha li-receptor tsa D1 tse kang NAc hoa hlokahala bakeng sa koae- CPP, empa eseng bakeng sa letsoalo le susumetsoang ke koae (koae)Baker et al., 1998; Neisewander et al., 1998). Tšusumetso e tobileng ea intra-accumbens ea D2 / D3 receptor antagonist sulpiride ho litoeba e bonts'a hore blockade ea D2 receptors e khutlisa mofuta o mong o matla oa koae (cocaine-ikiwa).Neisewander et al., 1995; Baker et al., 1996), empa lithuto tsena ha lia ka tsa hlahloba phello ea maikutlo a boitšoaro bo khothalletsoang ke koae. Ho khahlisang, ho tlalehiloe hore ente ea D2 receptor agonist quinpirole ho intra-medial prefrontal cortex e thibelitse ts'ebetso mme e fumane polelo ea sensitization ea boitšoaro ea cocaine-e susumetsangBeyer le Steketee, 2002).

Litoeba tsa D1 receptor null li se li hlahlobisitsoe maemong a boitšoaro bo lemaletseng, 'me liphuputso tsa pele li senotse hore litoeba tsa D1 receptor mutant ha lia atleha ho bonts'a litlamorao tsa kelello tsa cocaine ho likoloi le boits'oaro bo bobe.Xu et al., 1994; Drago et al., 1996). Leha ho le joalo, ho bonahala eka D1 receptor KO e hlakola karabelo e matla ea locomotor ho cocaine, empa ha e thibele ka botlalo ts'usumetso ea locomotor ho cocaine ho hang.Karlsson le al., 2008), ho bonts'a hore genetic KO ea li-receptor tsa D1 ha ea lekana ho thibela ka botlalo kutlo ea cocaine tlas'a maemo ohle.

Ho D2 receptor KO litoeba, ka mesebetsi e fokotsehileng ea locomotor, boemo ba likoloi tse tsamaisanang le koae bo tlase haholo ha bo bapisoa le litoeba tsa WT, empa liphoofolo tsena li ne li tšoana ka mokhoa oa ho susumetsa boits'oaro bo kopanetsoeng le koae, kapa boits'oaro bo batlang cocaine. ho fokotseha ho fokolang ha kutloelo-bohloko (Chausmer et al., 2002; Welter et al., 2007; Sim et al., 2013). Ho fokotseha ha li-receptor tsa D2 ho NAc ka ho kenngoa ha sehokelo sa lentiviral le shRNA khahlano le D2 receptor ha hoa ka la ama ts'ebetso ea basal locomotor, kapa tšusumetso ea boitšoaro bo khothalletsoang ke koae, empa e hlahisitse khatello ea maikutlo e hlahisang khatello ea maikutlo ea ts'ebetso ea koae.Sim et al., 2013). Liphumano tsena, hammoho le litlaleho tse fetileng, li khothaletsa ka matla hore blockade ea li-receptor tsa D2 ho NAc ha e thibele maikutlo a boitšoaro a cocaine-Mediated, le hore D2 receptor ho NAc e bapala karolo e ikhethang ho taolo ea phetoho ea synaptic e bakiloeng ke khatello ea maikutlo le bokhoba ba lithethefatsi. .

Boithuto ba morao-rao bo sebelisang litoeba tse hlahisitsoeng ka liphatsa tsa lefutso tse hlalosang mofuta oa Cre recombinase ka mokhoa o khethehileng oa sele, bo senotse karolo e itseng ea D1 kapa D2 receptor-expression MSN receptor in boitšoaro bo ts'oarehang ba koae. Mohlala, tahlehelo ea DARPP-32 liseleng tse bonts'a li-D2 e hlahisitse karabelo e ntlafalitsoeng ea locomotor ea cocaine (Bateup, 2010). Hikida le basebetsi mmoho le bona ba sebelisitse veA ea VAV ho hlalosa tetracycline-repression transaction factor (tTa) ba sebelisa ntho P (bakeng sa D1-expression MSNs) kapa enkephalin (bakeng sa babapatsi ba D2 ba hlalosang li-MSN)Hikida et al., 2010). Li-veector tsena li ile tsa kenngoa ka har'a NAc ea litoeba, moo ketane ea taolo ea leseli (TN) e neng e laoloa ke karolo e arabelang ea lefu la tetracycline, ho khetha ka nepo phetiso ea synaptic karolong e ngoe le e 'ngoe ea MSN. Inactivation e khutlisetsang ea D1 / D2-receptor-expression receptor-expression MSNs with the tetanus toxin (Hikida et al., 2010) e senotse likarolo tse ka sehloohong tsa lisele tse fanang ka maikutlo a D1 ho ithuta ka moputso le ho lemosa ka koae, empa ho ne ho sena phetoho ho maikutlo a bakoang ke ho se sebetse ha lisele tse fanang ka maikutlo tsa D2. U sebelisa meralo ea DREADD (li-receptors tse ntlafalitsoeng feela ke lithethefatsi tsa moqapi), ka polelo e kopantsoeng le vaerase ea GPCR ea enjine (Gi / o-motsoana oa batho oa mokokotlo oa M4Moamoheli oa DREADD, hM4D) e hlahisoang ke motsoako o mong oa meriana o sa sebetseng, Ferguson et al. (2011) e bonts'itse hore ts'ebetso ea li-neurons tsa "striatal D2-receptor-expression" e nolofalletsa nts'etsopele ea sensorization ea amphetamine. Leha ho le joalo, ts'ebetso ea optogenetic ea lisele tse hlahisang li-D2 receptor-expression ho NAc ha ea ka ea tlisa phetoho ho maikutlo a susumetsang a cocaine-ikiwaLobo, 2010).

Optogenetic inactivation of D1 receptor-expression MSNs using the light activated chloride pump, halorhodopsin eNpHR3.0 (e ntlafalitsoe Natronomonas pharaonis halorhodopsin 3.0), nakong ea ho pepesetsoa koae ho hlahisitse tlhokomeliso ea sensitization ea cocaine-induction locomotor (Chandra et al., 2013). Ntle le moo, ho hlophisoa bocha ha maemo a sebetsang a D1 receptor ho latela likarolo tsa NAc ho D1 receptor KO litoeba ho hlahisitse polelo ea D1 receptor sebakeng sa mantlha sa NAc, empa eseng khetla, Mediated D1 receptor-sensitization cocaine (Gore le Zweifel, 2013). Liphumano tsena li fana ka maikutlo a hore mekhoa ea DA e sebelisana le litekanyetso tsa boitšoaro tsa cocaine ka mokhoa o hlakileng, e nang le likarolo tse ikhethileng tsa D1 le D2 receptors, leha monehelo o nepahetseng oa li-receptor tsa D1 le D2 le litsela tsa bona tse tlase tsa lets'oao li ntse li tlameha ho beoa.

TLHOKOMELISO PUSELETSO

CPP paradigm ke mokhoa oa tloaelo o sebelisoang tlhahlobong ea boitsoaro le mokhoa oa maemo. Nakong ea thupelo ea CPP, moelelo o le mong o ikhethileng o entsoe ka liente tsa lithethefatsi, ha taba e 'ngoe e ngotsoe ka liente tsa koloi (Thomas et al., 2008). Nakong ea tlhahlobo ea CPP e se nang lithethefatsi e latelang, phoofolo e khetha lipakeng tsa lithethefatsi le lintho tse tsamaeang ka koloi. Khethollo e eketsehang bakeng sa moelelo oa lithethefatsi e sebetsa e le tekanyo ea litlamorao tsa tšebeliso ea lithethefatsi tsa Pavlovian (Thomas et al., 2008).

Leha ho kile ha tlalehoa pejana hore tsamaiso ea bobeli le ea maiketsetso ea D1 receptor antagonist SCH23390 e thibetse cocaine CPP (Cervo le Samanin, 1995; Baker et al., 1998), Litoeba tsa D1 receptor mutant ho tlalehiloe ho bonts'a likarabo tse tloaelehileng ho litlamorao tse khahlisang tsa koae ka har'a parala ea CPP (Miner et al., 1995; Karasinska et al., 2005). Mabapi le karolo ea li-receptor tsa D2 ho CPP, ho na le tumellano e kholo ho lingoliloeng hore D2-joalo ka bahanyetsi ba hloleha ho susumetsa khetho ea se hlahisoang ke cocaine (Spyraki et al., 1982; Shippenberg le Heidbreder, 1995; Cervo le Samanin, 1995; Manazi et al., 2004). E lumellana le lithuto tsena tsa litlhahlobo tsa meriana, litoeba tsa D2 receptor KO li bonts'itse palo ea CPP e lekanang le litoeba tsa WT (Welter et al., 2007; Sim et al., 2013). Ho feta moo, D2L - / - litoeba li qalile CPP ho sebelisa koae joalo ka litoeba tsa WT (Smith le al., 2002).

Haufinyane, phello ea phepelo e tlamang ea KO ea li-receptor tsa D2 mabapi le boits'oaro bo bobebe e tlalehiloe, 'me tlhahlobo ena e bontšitse hore litoeba tse haellang tsa D2 autoreceptors li bonts'itse kokeine ea cocaine, hammoho le sepheo se ntlafalitsoeng sa moputso oa lijo, mohlomong ka lebaka la ho ba sieo ha thibelo ea presynaptic e etsoang ke li-autoreceptors tse phahamisang DA tsa kantle ho naha le ho phahamisa tšebetso ea li-receptors tsa DA tsa postynaptic (Bello et al., 2011).

Liphetho tse fumanoeng mohloling o mong o fapaneng oa lipatlisiso li bonts'a hore ha li-DNNUMX tse hlahisang maikutlo a marang-rang li etsoa ka tšebetso ea optogenetics, litoeba tsa D1-Cre li hlahisa DIO-AAV-ChR1-EYFP ho NAc e bonts'itse keketseho e kholo ea khethollo ea koae / e putsoa - ha e bapisoa le sehlopha sa taolo (Lobo, 2010). Ka lehlakoreng le leng, litoeba tsa D2-Cre tse hlalosang DIO-AAV-ChR2-EYFP li bonts'itse paballo ea bohlokoa ea khethollo ea koae / leseli le buluuLobo, 2010), ho kenya letsoho karolo ea ho kengoa tšebetsong ha li-DNNUMX-expression MSNs ho matlafatsa litlamorao tse khahlisang tsa koae, ka ts'ebetso ea D1-e hlalosang li-MSN li hanyetsa phello ea moputso oa koae. Thibelo ea li-MSN tse hlahisang li-DNNUMX ka tetanus toxin (Hikida et al., 2010) e bakiloe ke ho fokotsoa ha cocaine CPP, ha ho sa fetoloe liphetoho lipakeng tsa CPP tsa cocaine kamora ho felisa phetiso ea li-synaptic ho li-DNNUMX-expression e hlalosang li-MSN (Hikida et al., 2010). Ka hona, lintlha tsena tse sebelisang li-optogenetics le mofuta o itseng oa inactivation ea li-neurons li kenya likarolo tse hanyetsanang tsa li-DNNUMX-le D1-e hlahisang li-MSN ho CPP, ka li-MSNs tsa D2-receptor-expression li hlahisa karolo ea ho phahamisa likarabo ka bobeli tsa moputso ho li-psychostimulants, le D1 receptor-expression e hlalosang li-MSNs. mekhoa ena (Lobo le Nestler, 2011).

COCAINE SELF-ADMINISTRATION LE COCAINE-SEEKING BAHAHA

Ts'ebetso ea cocaine ke mokhoa o sebetsang oo ho oona liphoofolo li etsang liteko (kapa pokello ea nko) bakeng sa ente ea lithethefatsi. Boitšoaro ba "ho itaola" bo sebetsa e le mohlala oa boitšoaro ba phoofolo oo motho a lemalloang ke ho lemalla (Thomas et al., 2008). Ho tlalehiloe hore lesion e khethiloeng ea liteishene tsa DA tse nang le 6-hydroxy DA (6-OHDA), kapa le neurotoxin kainic acid e NAc ka mokhoa o hlakileng e fana ka ts'ebetso ea ts'ebetso ea koae, e ts'ehetsa maikutlo a hore litlamorao tse matla tsa koae li itšetlehile ka mesolimbic DA (Pettit et al., 1984; Zito et al., 1985; Caine le Koob, 1994). E lumellana le liphetho tsena, Ka vivo lithuto tsa Microdialysis li bonts'a hore maemo a DA a ntlafalitsoeng a ntlafatsoa nakong ea tsamaiso ea cocaineself ka bobeli ba likhakanyo (Hurd et al., 1989; Pettit le Toka, 1989) le monkey (Czoty et al., 2000). Ka kopanelo, liphumano tsena li bonts'a hore phetisetso ea DA e ntlafalitsoeng ea NAc e bapala karolo ea bohlokoa boits'oarong ba koae.

DA receptor antagonists le agonists moderate cocaine self-management, e bontšang phello e itšetlehileng ka litekanyetso tsa biphasic. Mohlala, bahanyetsi ba ikhethileng bakeng sa D1 ka bobeliWoolverton, 1986; Britton et al., 1991; Hubner le Moreton, 1991; Vanover et al., 1991; Caine le Koob, 1994) le D2 (Woolverton, 1986; Britton et al., 1991; Hubner le Moreton, 1991; Caine le Koob, 1994) li-receptors li eketsa boineelo ba koae ka ho arabela litekanyetso tse tlase tsa mohanyetsi, empa li fokotsa taolo ea hau ho arabela tekanyetso e phahameng. Modulation ena e bonahala e hlakile haholo ha e kenngoa ka har'a NAc empa eseng senotlolo sa caudate, e bonts'a karolo e ikhethang ea li-receptors tsa NAc DA litloaelong tsa boikoetliso tsa koae.

Hamorao, ho sebelisa litoeba tsa D1 le D2 receptor null, ho ameha ha li-receptors tsena tsamaisong ea koae ho ile ha hlahlojoa. Ho khahlisang ke hore, le ha ho ne ho bonoa CPP e tloaelehileng ea litoeba ka har'a litoeba tsa D1 receptor KO, ho iphelisa ka koae ho felisitsoe ka litoeba tsena (Caine et al., 2007). Ho litoeba tsa D2 receptor KO leha ho le joalo, ho ipusa ha litekanyetso tse 'meleng tse tlase tsa cocaine ho ne ho sa amehe, athe ho ipusa ka litekanyetso tse ngata tsa cocaine e ne e hlile e eketseha (Caine et al., 2002). Haufinyane, Alvarez le basebetsi-mmoho ba tlalehetse hore ntlafatso ea synaptic ho li-DNNUMX tse hlahisang li-NNN ho etsahala ka litoeba tse nang le nalane ea boits'oaro ba koae ea koae (Bock et al., 2013). Ho thibela D2-MSN ho sebelisa mokhoa oa chemicogenetic ho matlafalitse ts'usumetso ea ho fumana koae, ha ts'ebetso ea optogenetic ea D2-MSN e hatelletse boits'oaro ba koae, e fana ka maikutlo a hore ho haptjoa ha D2-MSNs mesebetsing ea NAc ho khutlisetsa tsamaiso ea cocaine (Bock et al., 2013).

Boithuto bo batlisisang ho khutlisetsoa morao hoa boitšoaro bo batlang cocaine bo senotse hore tsamaiso ea D2 receptor agonists e khutlisetsa boits'oaro ba ho ts'oara koae (Boithati le al., 1996; De Vries et al., 1999, 2002; Spealman et al., 1999; Khroyan et al., 2000; Fuchs et al., 2002). Tumellanong le liphumano tsena, bahanyetsi ba li-receptor ba D2 ba latela mokhoa oa ho ts'oara lithethefatsi tse sebelisang koae (koae)Spealman et al., 1999; Khroyan et al., 2000), nakong ea kalafo ea kalafo ea kalafo ea morao-rao ka ngaka ea maiketsetso e kang D2 pele ho pente ea ente ea cocaine e bakileng boitšoaro (Boithati le al., 1996; Fuchs et al., 2002). Leha ho le joalo, ho bonahala eka li-agonists tsa D1 tse kang receptor ha li khutlise boitšoaro bo batlang cocaine (Boithati le al., 1996; De Vries et al., 1999; Spealman et al., 1999; Khroyan et al., 2000). Ha e le hantle, li-agonists tse tsamaisang tšebetso ea D1 le bahanyetsi ka mokhoa o hlophisehileng ba latela mokhoa oa ho batla lithethefatsi o susumetsoang ke ente ea "priming cocaine" (Boithati le al., 1996; Norman et al., 1999; Spealman et al., 1999; Khroyan et al., 2000, 2003), e bonts'ang karolo e fapaneng ea li-receptor tsa D1 le D2 ho priming-e susumetsang ea ho khutlisetsa morao ea ho batla koae.

Liphetho tse tsoang laboratoring ea rona li bonts'a hore ha ho na li-receptor tsa D2, ho khutlisetsoa ka koae ha hoa ka ha ameha (Sim et al., 2013). Ho khothaletsoa hore ho khutlisetsoa morao hoa ts'ebeliso ea lithethefatsi ho ka fanoa hape ke ho pepesetsoa hape ho susumetsa ho amanang le koae kapa khatello ea maikutlo (Shaham le al., 2003). Ha monyetla ona o lekoa, litlamorao tse tsoang laboratoring ea rona li fumane hore le ha khatello ea kelello e baka puseletso e kopantsoeng le koae ho litheko tsa WT, khatello ea maikutlo e hatelletse ho khutlisetsoa hoa koae ka diphoofolong tsa D2, e fana ka maikutlo a karolo e sa sebetseng ea li-receptor tsa D2 taolong ea synaptic phetoho e bakoa ke khatello ea maikutlo le bokhoba ba lithethefatsi (Sim et al., 2013).

BOPHELO BA BOPHELO BA HO BONTŠA MOKHATLO OA LITABA

Litsela tse amanang le lijo le lijo li ka kenya tšebetsong lipotoloho tse fapaneng tsa boko tse kenyellelitsoeng moputsong, ho kenyeletsoa NAc, hippocampus, amygdala le / kapa cortex ea pele le ea bohare ba maqhubu (Palmiter, 2007; Kenny, 2011). Ho lumeloa hore tsamaiso ea mesolimbic DA e khothaletsa ho ithuta ka litloaelano lipakeng tsa moputso oa tlhaho le tikoloho eo ba fumanoang ho eona; ka hona, lijo le metsi, kapa mekhoa e li boletseng esale pele, e khothaletsa ho thunya kapele ho li-neuron tsa DA, le ho bebofatsa boitšoaro bo lebisitsoeng ho fihlela moputso (Palmiter, 2007). Ka sebele litoeba tse haelloang ke DA li bontša ho felloa ke tšusumetso ea ho fepa (Zhou le Palmiter, 1995), ha litoeba tsa D1 li-receptor null li bonts'a kholo e holileng le ho phonyoha ho tlase kamora ho khoesoa; mofuta ona oa phenotype o ka pholosoa ka ho fa litoeba tsa KO monyetla oa ho fumana lijo tse fumanehang habonolo, ho fana ka maikutlo a hore ho ba sieo ha D1 receptor ho amana haholo le khaello ea koloi (Drago et al., 1994; Xu et al., 1994). Ka lehlakoreng le leng, li-receptor tsa Kolo ea D2 li bontsitse tekanyo ea lijo le boima ba 'mele hammoho le tšebeliso ea matla a matla a basal ha a bapisoa le mofuta oa bona oa litter.Kim et al., 2010). Ka hona, ho thata ho qaqisa karolo e tobileng ea tsamaiso ea DA le ea li-receptor subtypes moputsong oa lijo. Leha ho le joalo, lithuto tse ngata tsa batho li bontša bohlokoa ba li-receptor tsa D2 taolong ea moputso oa lijo o amanang le botenya.

TLHALOSO EA MOTSOALLE OA D2 TLHOMPHOFUTSOENG EA MOTSOALLE

Bopaki bo ntseng bo eketseha bo fana ka maikutlo a hore ho fapana ho li-receptor tsa DA le ho lokolloa ha DA ho bapala karolo ea ho nona le ho nona haholo, haholoholo kamanong le ts'ebetso le polelo ea striatal D2 receptor function and expression (Stice et al., 2011; Salamone le Correa, 2013). Lithutong tsa liphoofolo, ho bontšitsoe hore ho fepa ho eketsa khatello ea kantle ea DA ho NAc (Bassareo le Di Chiara, 1997), ka mokhoa o ts'oanang le lithethefatsi tsa tlhekefetso. Leha ho le joalo, ho fapana le phello ea eona boits'oarong bo amanang le ts'ebeliso ea lithethefatsi, NAc DA depletion feela ha e fetole mokhoa oa ho fepa (Salamone et al., 1993). Ho bonahala eka "blockacological blockade" ea D1 le D2 receptors ho NAc e ama tsela eo koloi e sebetsoang ka eona, palo le nako ea ho fepa, empa ha e fokotse palo ea lijo tse jeoang.Baldo et al., 2002). Ho khahlisang, data ea morao-rao e bonts'itse hore ho ja ka mokhoa o hlonephang ho ntlafalitsoe ke ts'ebetso e matla ea ts'ebetso ea ts'ebetso ea uncateral NAc shell, mme phello ena e kopantsoe le karolo ke ts'ebetso ea D2 receptor, ha maikutlo a tebileng a ts'usumetso ea dorsal striatum a ne a sena tšusumetso ts'ebetsong ena (Halpern et al., 2013) ka litoeba. Leha ho le joalo, ho tlalehiloe hore ha ho pepesetsoa lijo tse nang le mafura a mangata, litoeba tse nang le methapo e tlase ea li-receptor tsa D2 ka har'a putamen li bonts'a phaello e fetang ea boima ho feta litoeba tse nang le li-receptorin tse phahameng tsa D2 sebakeng se le seng (Huang et al., 2006). Phuputso ena e bapisitse li-receptor tsa DAT le D2 tse maemong a sa foleng a mafura a mangata, a nang le mafura a mangata le a mafura a mangata, 'me a fumana hore letsoalo la "receptor" la D2 le theohile haholo karolong ea rostral ea caudate putamen maemong a phahameng a sa foleng. - litloholo tse nang le mafura a bakoang ke ho ja li bapisoa le litoeba tse thibelang mafura le lijo tse fokolang tse mafura a mangata (Huang et al., 2006). Boemo bona bo tlase ba D2 receptor bo ka amahanngoa le ho lokolloa ha DA, mme ho boetse ho tlalehiloe hore tšebeliso ea lijo tse nang le mafura a mangata, e nang le tsoekere e ngata e lebisa ho tlotsoeng ha li-receptor tsa D2 (Tse nyenyane le al., 2003) le phokotso ea theko ea DA (Davis et al., 2008).

Lithutong tsa batho, batho ba batenya le ba lemaletseng lithethefatsi ka bobeli ba tloaetse ho bonts'a polelo e fokotsehileng ea li-receptor tsa D2 libakeng tse nang le mathata, le liphuputso tse entsoeng ka monahano li bonts'itse hore likarolo tse tšoanang tsa boko li hlahisoa ke lijo le lithahasello tse amanang le lithethefatsi (Wang et al., 2009). Lipatlisiso tsa Positron emission tomography (PET) li bontša hore ho fumaneha ha li-receptor tsa D2 ho fokotsehile ho batho ba batenya ho lekana le index ea bona ea boima ba 'mele (Wang et al., 2001), ka hona, e fana ka tlhahiso ea hore khaello ea DA ho batho ba batenya ho ka ntlafatsa ts'ebetso ea lijo joalo ka mokhoa oa ho lefella ts'ebetso e fokotsehileng ea li-circuits tsa meputso tsa DA. Volkow le basebetsi-mmoho ba boetse ba tlaleha hore batho ba baholo ba sa ts'oanang le ba baholo ba hlokang leeme ba bonts'a li-receptor tse fokolang tsa D2, le hore sena se ne se amana hantle le metabolism sebakeng sa dorsolateral pele, medial orbitof Pambal, anterior cingulate gyrus le somatosensory cortices (Volkow et al., 2008). Tlhahlobo ena e lebisitse ho lipuisano mabapi le hore na ho fokotseha ha li-receptor tsa D2 ho ka kenya letsoho ho nona ka ho fetoloa ha methapo ea methapo ea methapo e nkang karolo taolong ea thibelo le tšilafalo ea methapo, le hore na kamano e teng lipakeng tsa li-receptor tsa D2 le metabolism ho li-cortices tsa somatosensory. process palatability) e ka hlakola e 'ngoe ea mekhoa eo ka eona DA e laolang thepa e matlafatsang ea lijo (Volkow et al., 2008).

Stice le basebetsi-'moho ba sebelisitse imaging ea matla a ho sebetsa ka matla a sefahleho (fMRI) ho bontša hore batho ka bomong ba ka ba le chelete e ngata ea ho lefella sephetho sa hypofunctioning dorsal striatum, haholo tse nang le liphatsa tsa lefutso tsa A1 allele ea TaqIA sebakeng sa D2 receptor (DRD2 / ANKK1) mofuta, o amanang le khatello e tlase ea methapo ea methapo ea methapo ea methapo ea methapo le D2.Stice et al., 2008a,b). Litlhokomeliso tsena li bonts'a hore batho ba bonts'ang ts'ebetso e kenelletseng nakong ea lijo, ba kotsing ea ho ba le botenya, haholo-holo ba nang le tšoaetso ea liphatsa tsa lefutso bakeng sa ho pepesoa ha DA ho supa libakeng tsa boko tse kenyelletsoeng moputsong oa lijo (Stice et al., 2008a, 2011). Leha ho le joalo, tlhaiso-leseling ea morao-rao e bonts'itse hore batho ba baholo ba batenya ba nang le bothata ba ho ja ka mokhoa o sa tloaelehang kapa ba nang le bothata ba ho ja ba na le mofuta o ikhethang oa polymorphism ea "TaqIA D2 receptor (DRD2 / ANKK1) mofuta (Davis et al., 2012); ka hona, hoa utloahala hore lits'ebetso tse tšoanang tsa DA tsa boko li sitisoa ke tšusumetso ea lijo le bokhoba ba lithethefatsi, leha ho e-so ho hlake hore na li-data tsa receptor tsa DA li emela eng ponong ea tšebetso ea methapo ea kutlo ea DA bokong.

Joalo ka batho ba batenya, ho fumaneha ka mokhoa o tlase oa D2 ho amana le tlhekefetso e sa foleng ea koae ho batho (Volkow et al., 1993; Martinez et al., 2004). Ho fapana le moo, ho hlonepha ho feta ha li-receptor tsa D2 ho fokotsa taolo ea tahi ho litoeba (Thanos et al., 2001). Ho batho, ho fumaneha ka mokhoa o phahameng ho feta o tloaelehileng oa D2 receptor ho litho tse se nang joala ba malapa a joala.Volkow et al., 2006; Gorwood et al., 2012), e ts'ehetsa ts'oaetso ea hore maemo a tlase a li-receptor tsa D2 a ka amahanngoa le kotsi e eketsehileng ea mathata a lemallo. Ka hona, ho a khonahala hore ka bokong ba batho ba batenya ka ho fetesisa le ba sebelisang lithethefatsi tse sa feleng, ho na le lintlha tse tlase tsa DA, le tokollo ea DA ka linako tse ling e amanang le lijo kapa litheko tsa lithethefatsi, hammoho le polelo e tlase, kapa li-receptor tsa D2 tse sa sebetseng.

Methati ea dopamine receptor libakeng tse ling tsa boko le eona e ka ba ea bohlokoa. Ka mohlala, Fetissov et al. (2002) o hlokometse hore likhoto tsa Zucker tse feteletseng, tse bonts'ang mokhoa oa ho fepa o nang le boholo bo boholo ba lijo le palo e nyane ea lijo, li na le polelo e tlase haholo ea polelo ea D2 receptor ho ventromedial hypothalamus (VMH). Ho khahlisang, thutong ea bona, ha mohanyetsi ea khethiloeng oa D2 receptor, sulpiride e kenngoa ho VMH ea likhofu tse feteletseng le tse bobebe, karabelo ea hyperphagic e ile ea phahamisoa feela ho likhoto tse feteletseng, e fana ka maikutlo a hore ka ho mpefatsa boemo bo seng bo ntse bo le tlase ba li-receptor tsa D2, e ne e le hoa khoneha ho eketsa takatso ea lijo. Polelo ena e tlase ea D2 ea receptor e ka baka tlhahiso e fetelletseng ea litheko tse makatsang nakong ea ho ja lijo le sephetho se fokotsoang sa maikutlo a DA, se tla nolofalletsa DA ho lokolloa libakeng tsa kelello "tse lakatsang" DA (Fetissov et al., 2002).

Haufinyane tjena, boithuto bo botle bo entsoeng ke Johnson le Kenny (2010), e ne e bonoa e le liphoofolo tse fuoang "lijo tse tsoang ka jareteng" tse kenyelletsang lijo tse matlafatsang tse nang le mafura a mangata, tse bonts'ang boitšoaro bo qobelloang. Ntle le ho ho rata ha bona haholo le ho ja ka thata joalo ka likhoto tsa lijo tsa kofi le tsona li fokotse polelo ea D2 receptor ho striatum. Ho makatsang ke hore li-receptor tsa lentivirus tse kopantsoeng le li-receptor tsa D2 li ile tsa potlakisa nts'etsopele ea bofokoli ba menyetla e kang ea ho lemalla joala kapa ho qalella ha lijo tse matlafatsang tse kang tloaelo ea ho ja lijo ka phihlello e atolositsoeng ea lijo tse matlafatsang tse nang le mafura a mangata (Johnson le Kenny, 2010), hape e bonts'a hore mekhoa e tloaelehileng ea hedonic ka hona e ka eketsa botenya le bokhoba ba lithethefatsi. Leha ho le joalo, laboratori ea rona e fumane litlamorao tse sa lebelloang tse bonts'ang hore litoeba tsa D2 KO li na mokhoa o tsitsitseng o nang le lets'oao le ntlafalitsoeng la hypothalamic leptin ha le bapisoa le litoeba tsa WT (Kim et al., 2010). Ka hona, re ke ke ra hlakola hore li-receptor tsa D2 li bapala karolo ea tsamaiso ea homeostatic ea ho ikamahanya le taolo ea homeostasis ea matla joalo ka leptin, ho tlatselletsa ho karolo ea eona boitshwarong ba tšusumetso ea lijo. Mohlala oa phoofolo e nang le liphatsa tsa lefutso tse sebelisang liphatsa tsa lefutso tsa D2 liseleng tse hlahisang leptin mohlala, kapa lisele tse ling tse amanang le moputso, hammoho le lisebelisoa tse kopanyang tsa neural, li ka hlakisa karolo ea tsamaiso ea DA ka li-receptors tsa D2 lijong. moputso le taolo ea homeostatic ea lijo.

DOPAMINERGIC REWARD LITLHAKISO TSE LING TSA HO FIHLELA CIRCUIT

Bopaki bo ntseng bo eketseha bo bonts'a hore balaoli ba homeostatic ba ho ja lijo, joalo ka leptin, insulin, le ghrelin, ba laola le ho sebelisana le moputso oa lijo, 'me ka hona ba laola likarolo tsa boits'ireletso ba lijo le maemo a boits'oaro ba lijo tse susumetsang (Abizaid et al., 2006; Fulton et al., 2006; Hommel et al., 2006; Baicy et al., 2007; Farooqi et al., 2007; Palmiter, 2007; Konner et al., 2011; Volkow et al., 2011). Liphumano tsa morao-rao li senola hore lihormone tse kenelletseng ho laola matla a homeostasis li boetse li ama ka ho toba li-neuron tsa DA; mohlala, leptin le insulin li thibela li-neurons tsa DA ka ho toba, ha li-ghrelin li li kenya tšebetsong (Palmiter, 2007; Kenny, 2011).

Hommel le basebetsi-mmoho ba bonts'itse hore li-neurons tsa VTA DA li hlahisa leptin receptor mRNA, mme e arabela leptin ka ts'ebetso ea ts'ebetso ea "JAK-STAT" (Janus kinase-sign transducer le activator of transcript), e leng tsela e kholo e kenyelitsoeng ho leptin receptor ho theoha hoa mats'ooao, le phokotso ea sekhahla sa ho thunya ha methapo ea DA (Hommel et al., 2006). Boithuto bona bo bonts'itse hore taolo e tobileng ea leptin ho VTA e bakile ho fokotseha ha lijo, ha RNAi-mediated ea nako e telele ea li-receptors tsa leptin ho VTA e lebisitse keketseho ea lijo, ts'ebetso ea methapo le kutloelo-bohloko ea lijo tse fumanehang habonolo. Lintlha tsena li tšehetsa karolo ea bohlokoa bakeng sa VTA leptin receptorsin e laolang boitšoaro ba ho fepa, hape e fana ka bopaki bo sebetsang bakeng sa ketso e tobileng ea lets'oao la metabolic ea pheriferale ea li-neurons tsa VTA DA. Liphetho tsena li tsamaisana le mohopolo oa hore leptin ho tšoaea VTA hangata e hatelletse ho saena ha DA, mme ka lebaka leo e fokotse takatso ea lijo le ts'ebetso ea locomotor. Sena se fana ka maikutlo a karolo ea 'mele bakeng sa ho supa leptin ho VTA, leha bangoli ba sa ka ba bontša hore phello ea ente ea vaerase ea ho fepa e amana hantle le ho eketseha ha ho saena ha DA (Hommel et al., 2006).

Fulton le basebetsi-mmoho le bona ba fuputse bohlokoa ba tšebetso ba ketso ea leptin ho li-neurons tsa VTA DA, ho holisa kutloisiso ea liketso tse ngata tsa leptin ho potoloho ea moputso oa DA (Fulton et al., 2006). Ba sebelisa immunohistochemistry habeli-label, ba bone ho eketseha ha phosphorylation ea STAT3 ho VTA kamora ho tsamaisoa ha leptin. Li-neurons tsena tse ntle tsa pSTAT3 li-colocalized ka li-neurons tsa DA, le ho isa tekanyong e tlase le matšoao a li-neurons tsa GABA. Retrogade neuronal e ts'oereng ho tsoa ho NAc e senoletse colocalization ea tracer ka pSTAT3, e bonts'a hore sephutheloana sa li-neurons tsa VTA DA tse hlalosang projeke ea leptin ho NAc. Ha ba lekola ts'ebetso ea leptin ho VTA, ba fumane hore ob / ob litoeba li bile le karabelo e fokolang ea locomotor ho amphetamine, mme e haelloa ke maikutlo a locomotor ho li-injection tse phetoang tsa amphetamine, ka bofokoli ka bobeli bo khutlisoa ke ts'ebetso ea leptin, ka hona e bonts'a hore tsela ea DAaccardbenss, e bohlokoa ho kenyelletsa boitšoaro bo susumetsoang, e boetse e arabela pontsong ena e tsoang ho adipose (Fulton et al., 2006). Lintlha tsena tsa bopaki li khothalelitse ketso ea leptin tsamaisong ea moputso ea DA. Leha ho le joalo, ka lebaka la boemo ba 'mele ba polelo ea leptin receptor e bonahala e le tlase haholo bohareng ba mokokotlo, maemo a tloaelehileng a potolohileng a leptin a bonahala a se na tšusumetso e kholo ho leptin receptor signature kahare ho VTA. Kahoo, hore na Ka vivo Leptin e ka fana ka phello e kholo ho thibela ts'ebetso ea neuron ea DA ka li-receptors tsa bona ho VTA e lula e belaella.Palmiter, 2007).

Ho boetse ho na le lithuto tsa batho tse bontšang hore kannete leptin e ka laola likarabo tse khotsofatsang. Farooqi le basebetsi-mmoho ba tlaleha hore bakuli ba nang le bofokoli ba tlhaho ea leptin ba bonts'itse ts'ebetso ea lipheo tsa mesolimbic tsa DA (Farooqi et al., 2007). Naheng e haelloang ke leptin, litšoantšo tsa lijo tse ratoang hantle li ile tsa hlahisa karabo e batlang e batsi, leha taba e sa tsoa fepa, le ha e le ka mor'a kalafo ea leptin, litšoantšo tse ratehang tsa lijo li hlahisitse karabelo ena feela maemong a potlakileng. ka karabelo lithutong tsa taolo. Leptin e fokotsa ts'ebetso ho NAc-caudate, le ts'ebetso ea mesolimbic (Farooqi et al., 2007). Kahoo, thuto ena e fana ka maikutlo a hore leptin e fokotse likarabo tse khotsofatsang mabapi le lijo, li sebetsa ka har'a tsamaiso ea DA (Farooqi et al., 2007; Volkow et al., 2011). Phuputso e 'ngoe ea fMRI e entsoeng ke Baicy et al., Eo hape a etsoang le bakuli ba nang le bofokoli ba tlhaho ea leptin, e bonts'itse hore nakong ea ho shebella maikutlo a amanang le lijo, ho khutlisetsa leptin ho fokotse ts'ebetso ea neural libakeng tsa boko tse amanang le tlala (insula, parietal le temport cortex), ha a ntse a ho ntlafatsa ts'ebetso libakeng tse hokahaneng le thibelo le satiety (senepe se etellang pele pele; Baicy et al., 2007). Ka hona, ho bonahala eka leptin e sebetsa ho li-circuits tsa neural tse kenyelletsang tlala le ho satiety ka taolo ea inhibitory.

Hormone e 'ngoe ea peptide, ghrelin, e hlahisoang ka mpeng le manyeme, e tsejoa ho eketsa takatso ea lijo le takatso ea lijo (Abizaid et al., 2006). The ghrelin receptor ukuaji wa lekunutu sephiri secagorue 1 receptor (GHSR) e fumaneha litsing tsa hypothalamic hammoho le VTA. Abizaid le basebetsi-mmoho ba bonts'itse hore ho litoeba le likhoto, ghrelin e tlameletsoe ho li-neurons tsa VTA, moo e ileng ea baka ts'ebetso ea ts'ebetso ea methapo ea DA, sebopeho sa methapo ea kutlo, le phetoho ea DA ho NAc, ka mokhoa o itšetlehileng ka GHSR. Ntle le moo, ba bonts'itse hore taolo e otlolohileng ea VTA ea ghrelin e boetse e bakile boitšoaro ba ho fepa, ha ho tsamaisoa ha VA ea motho ea ikhethileng ea GHSR ho thibetse phello ea orexigenic ea li-ghrelin tse potolohang, mme ba phephetsa phepelo ea lijo kamora ho itima lijo, ba fana ka maikutlo a hore meputso ea DA ea potoloho e lebisitsoe ghrelin ho susumetsa tšusumetso ea lijo (Abizaid et al., 2006).

Insulin, e leng e 'ngoe ea lihormase tsa bohlokoa tse kenyelletsoeng taolong ea metabolism ea tsoekere, le ho thibela phepo, ho bontšitsoe hore e boetse e laola tsamaiso ea DA bokong. Li-receptor tsa insulin li hlahisoa libakeng tsa boko tse ruileng li-neuron tsa DA, joalo ka striatum le midbrain (Zahniser et al., 1984; Figlewicz et al., 2003), ho fana ka maikutlo a ts'ebelisano e sebetsang pakeng tsa litsamaiso tsa insulin le tsa DA. Ho joalo, ho bontšitsoe hore insulin e sebetsa ho li-neuron tsa DA, mme ho kenella ha insulin ho VTA ho fokotsa ho ja lijo ho likhoto (Figlewicz et al., 2008; Bruijnzeel et al., 2011). Boithuto ba morao-rao mabapi le ho hlakoloa ha li-insulin receptors ka har'a li-neuron tsa midbrain DA ho bontša hore ho qhekella hona ho baka boima ba 'mele, boima ba mafura le hyperphagia (Konner et al., 2011). Ha insulin e hlohlelletsa ho thunya khafetsa ho 50% ea li-neuron tsa dopaminergic VTA / SN, karabelo ena e ile ea felisoa ho litoeba tse nang le insulin receptor tse tlositsoeng ka boomo li-neuron tsa DA. Ho khahlisang, ho litoeba tsena, polelo ea li-receptor ea D2 ho VTA e ile ea fokotseha ha e bapisoa le litoeba tsa taolo. Ho feta moo, litoeba tsena li bontšitse karabelo e fetohileng ea koae ka tlasa maemo a thibeloang ke lijo (Konner et al., 2011). Tlaleho e 'ngoe ea morao-rao e bonts'a hore insulin e ka baka khatello ea maikutlo ea nako e telele (LTD) ea li-synapses tsa mouse tse mahareng ho li-neurons tsa VTA DA (Labouèbe et al., 2013). Ntle le moo, kamora lijo tse matlafatsoang tse nang le mafura a mangata, tse phahamisang maemo a "insulin" a tsoang kantle ho "insulin", a qhekelloa. Kamora nako, insulin ea VTA e fokotsa boitšoaro bo lebelletseng ho litoeba, le CPP bakeng sa lijo ho likhoto. Phuputso ena e hlahisa bothata bo khahlisang mabapi le hore na insulin e ka fetola moputso oa potoloho ea moputso joang, mme e fana ka tlhahiso ea mofuta o mocha oa "insulin" e kentsoeng polasetiki ea synaptic ho li-neurons tsa VTA DA (Labouèbe et al., 2013).

LIPOTSO TSA MOKHOA OA HO FUMANA

Tlhahlobo ena e shebile karolo ea sistimi ea DA, haholo-holo e shebane le likarolo tsa D1 le D2 receptors ka boits'oaro bo amanang le moputso, ho kenyelletsa ho lemalla le ho khothaletsa lijo. Leha ho le joalo, hoa tsebahala hore tsamaiso ea DA ho moputso ona oa potoloho e fetisoa ka mokhoa o hlakileng ke glutamatergic, GABAergic, le lits'ebetso tse ling tsa neurotramistter, tse etsang li-circuits tse tobileng ho kenyeletsa litaba tsa boitšoaro tsa neuronal. Liphetoho tsa morao-rao tse sebelisang lisebelisoa tsa optogenetic ho fetola ho thunya ha neuronal le ho sebetsa ka leseli, hammoho le li-DREADD, hammoho le ho qhekella ka liphatsa tsa lefutso tsa lisele tse khethehileng tsa methapo kapa li-circuits joale li re lumella ho nchafatsa leseli la rona mabapi le lipotoloho tsa moputso ka ho lemalla, le boleng ba ho ja lijo tse matla. . Ha ho na bonnete ba hore mela ena ea lipatlisiso e fane ka motheo bakeng sa tataiso ea nako e tlang ea thuto ea rona ho li-neurocircuitry tsa tsamaiso ea DA maemong ana a boitšoaro. Boithuto ba nako e tlang bo ka kenyelletsa mananeo a ntlafalitsoeng a limolek'hule tsa bohlokoa tse tšoaeang, mohlala, ho supa limolek'hule tse thathamisitsoeng ho D1 le D2 receptor signaling cascades, ho hlahloba tšusumetso ea limolek'hule tsena ho kenyelletsong le polelo ea mekhoa e itseng ea moputso. Ka lebaka la hore li-receptor tsena tse peli li sebelisa litsela tse ikhethang tse bonts'ang, ho latela li-protein tsa G tsa tsona, hammoho le ts'ebetsong ea limolek'hule tse tloaelehileng tse kang ERK, ho aroloa ka mokhoa o fapaneng oa li-receptor, hammoho le limolek'hule tsa tsona tse theohelang li ka etsa hore mofuta o fapaneng oa karabelo ea 'mele. Ho feta moo, ka mohopolo ona oa khopolo ea DA le boithuto ba mantlha le mahlale a morao-rao, lipatlisiso tsena li tla ba le bohlokoa bo boholo phuputsong ea kliniki ea mafu a amanang le methapo le mafu a kelello. Ka hona, matsapa a rona a ho tsoela pele ho tseba le ho khetholla mokhatlo le ho feto-fetoha ha mesebetsi ea DA ho liphoofolo le ho batho li tla kenya letsoho ho hlakiseng li-circuits tsa neural tse thehiloeng pathophysiology ea ts'ebeliso ea lithethefatsi le mathata a ho ja.

Tlhōlisano ea Tlhaloso

Sengoli se phatlalatsa hore lipatlisiso li entsoe kamora ho se be le kamano efe kapa efe ea khoebo kapa ea lichelete e ka nkuoang e le khohlano e ka bang teng ea phaello.

lumela hore baa fokola

Mosebetsi ona o ne o tšehelitsoe ke thuso ea National Research Foundation of Korea (NRF) e tšehelitsoeng ke mmuso oa Korea (MSIP; Che. 2011-0015678, No. 2012-0005303), MSIP: Lekala la Saense, ICT le Moralo oa Bokamoso le thuso ea Morero oa R&D oa Theknoloji ea Bophelo ea Korea (A111776) ho tsoa Lefapheng la Bophelo le Boiketlo, Rephabliki ea Korea.

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