Dopamine Genetics le Mosebetsi Lijong le Tlhekefetso ea Meriana (2013)

J Genet Syndr Gene Ther. 2013 February 10; 4(121): 1000121. doi:  10.4172 / 2157-7412.1000121

inahaneloang

Ka mor'a ho kena nakong ea liphatsa tsa lefutso ka kholiseho nakong e tlang ea meriana, ho kopanyelletsa le ho kula kelello, ho tseba karolo ea DNA le mekhatlo ea polymorphic e nang le boipheliso ba boko ba boko bo lebisitse kutloisiso e ncha ea boitšoaro bo hlephileng ba ho lemalla. Hoa hlokomeleha hore leano lena le ka fana ka kalafo bakeng sa ba limilione ba hlasetsoeng ke "Moputso oa Mathata a Moputso" (RDS) bothata ba liphatsa tsa lefutso ba potoloho ea boko. Sehlooho sena se tla lebisa tlhokomelo litabeng tsa lithethefatsi le lijo tsa ho lemalla liphatsa tsa lefutso, le karolo ea dopamine liphatsa tsa lefutso le ho sebetsana le lithethefatsi, ho kopanyelletsa le ho sebelisana ha mohoebi oa dopamine le lijo tsa sodium. Re tla hlahloba ka bokhutšoanyane maikutlo a rona a amang liphatsa tsa lefutso tsa lithethefatsi tse ngata (RDS). Liphuputso li bontšitse hape hore ho hlahloba karolo ea liphatsa tsa lefutso tsa meputso le li-polymorphisms ho nolofalletsa ho khetholla kotsi ea lefutso ho RDS. Lenane lena le bitsoa "Score ea Risk Addiction Risk Score (GARS)", 'me ke sesebelisoa sa ho hlahlojoa ha liphatsa tsa lefutso tsa RDS. Tšebeliso ea teko ena, joalokaha ho boletsoe ke ba bang, e ne e tla ruisa sechaba sa bongaka ka ho tsebahatsa kotsing ea batho ba sa le banyenyane haholo. Re khothaletsa, ka botebo mosebetsi oa liphoofolo le mefuta ea batho ea tahi. Re khothaletsa ts'ebetso e eketsehileng ea li-syringe tsa neurogenetic tsa commonalities pakeng tsa lijo le lithethefatsi tse tsitsitseng lithethefatsi le ho tšehetsa ho nahana ka likhopolo tse kang "Salted Food Addiction Hypothesis".

Keywords: Ho lemalla lijo, ho sebelisa lithethefatsi ho sebelisa lithethefatsi (SUD), ho ba le bothata ba moputso (RDS), Dopaminergic gene genetic polymorphisms, Neurogenetics

Selelekela

Dopamine (DA) ke neurotransmitter bokong, e laolang maikutlo a bophelo. Mokhoa ona oa katleho o bakoa ke ho sebelisana ha DA le li-neurotransmitters tse kang serotonin, opioids le lik'hemik'hale tse ling tsa boko. Maemong a tlaase a serotonin a amahanngoa le ho tepella maikutlong. Matšoao a phahameng a opioids (opium ea boko) e amahanngoa le maikutlo a bophelo [1]. Ho feta moo, li-receptors tsa DA, sehlopha sa G-protein hammoho le receptors (GPCRs), li 'nile tsa etsoa bakeng sa nts'etsopele ea lithethefatsi bakeng sa ho phekola mafu a kelello,2]. DA e 'nile ea bitsoa "khahlanong le khatello ea kelello" le / kapa "monate" molek'hule, empa sena se sa tsoa phehisana khang ke Salamone le Correa [3] le Sinha [4].

Ka lebaka leo, re 'nile ra phehisana [5-8] hore Nucleus accumbens (NAc) DA e na le karolo ho ts'ebelisong ea ho susumetsa, 'me ho se sebetse ha DA ho fosahetseng ho ka tlatsetsa matšoao a susumetsang a ho tepella maikutlo, litšobotsi tsa tšebeliso e mpe ea lithethefatsi le mathata a mang [3]. Le hoja e se e le setso ho bitsa li-neurone tsa DA e le li-neurons tse nang le moputso, sena ke ho fana ka matla ka ho fetisisa, 'me hoa hlokahala ho nahana hore na likarolo tse fapaneng tsa tšusumetso li ama joang ka dopaminergic manipulations. Ka mohlala, NAC DA e kenye letsoho litabeng tsa Pavlovia, 'me mokhoa oa ho ithuta o matlafatsa-mokhoa oa boits'oaro, mekhoa e metle ea tšebetso, mekhoa ea ts'ebetso ea boits'oaro e ts'ehetsa mosebetsi oa boithaopo le boiteko bo matla le hoja o sa rarolle tlala ea pele, tšusumetso ea lijo kapa takatso ea lijo [3,5-7].

Ha ho ntse ho le nnete hore NAC DA e kenyelletsoa tshebetsong e tsitsitseng ea ts'oaetso le e tsosang takatso re pheha khang ea hore DA e boetse e ameha e le mokena-lipakeng oa bohlokoa mohloling oa lijo kapa takatso e tšoanang le lithethefatsi tsa tlhekefetso. Ho hlahlojoa ha lingoliloeng ho fana ka lipampiri tse ngata tse bontšang bohlokoa ba DA ts'ebetsong ea takatso ea lijo le takatso ea lijo [6,7]. Khauta e 'nile ea bula maliboho khopolo ea ho lemalla lijo [5-8]. Avena et al. [9] ka nepo ba pheha khang ea hore kahobane lithethefatsi tse lemalloang li hlahisa mekhoa e tšoanang ea methapo ea maikutlo e ileng ea fetoha ho arabela meputsong ea tlhaho, ho lemalla lijo ho bonahala eka hoa utloahala. Ho feta moo, tsoekere ka sehla e tsebahala e le ntho e hlahisang li-opioids le DA 'me kahoo ho ka lebelloa hore e be le menyetla ea ho lemalla. Ka ho khetheha, li-neural adaptations li kenyeletsa liphetoho ho DA le ho opioid receptor tlama, enkephalin mRNA polelo le DA le acetylcholine ho lokolloa NAc. Bopaki bo tšehetsa khopolo-taba ea hore maemong a mang litoeba li ka ba ts'oaetso ea tsoekere.

Mosebetsi oa Wang et al. [10] tse amanang le lithuto tsa ho nahana ka boko ba batho li entse hore ho be le lipotoloho tsa DA-modulated ho latela mokhoa oa ho ja (pathologic). Liphuputso tsa bona li bontša hore DA e sebakeng sa extracellular ea striatum e eketseha ka lijo tse nang le lijo, hona ke bopaki ba hore DA e ka 'na ea kenngoa mofuteng oa lijo tseo e seng tsa hedonic. Hape ba fumane hore orbitofrontal cortex metabolism e eketsoa ke lijo tse bontšang hore sebaka sena se amahanngoa le sepheo sa ho phelisana ha lijo. Ho na le ho fokotseha ho hlokomelisoang ha ho fumanoa ho fumanoa ha DA D2 ho fumanoa lihloohong tse ngata, ho tšoana le ho fokotseha ha lihlooho tse nang le lithethefatsi tse ngata, kahoo lihlooho tse ngata li ka 'na tsa etsoa pele ho sebelisa lijo ho lefella nakoana bakeng sa liphutheho tsa moputso [11]. Ha e le hantle, liphello tse matla tse matlafatsang tsa lijo le lithethefatsi li karolo e le 'ngoe ka lebaka la ho eketseha ha tšohanyetso ea DA matsatsing a boko bo botle ba boko. Volkow et al. [11] a bontša hore ho eketseha ka tšohanyetso ha DA ho ka fetela mekhoa ea ho laola homeostatic boko ba batho ba tlokotsing. Liphuputso tsa ho nahana ka ho ba le maikutlo a ho ba le pelo li entse hore ho se ke ha e-ba le ts'ebetso ea methapo ea pelo e hlahisang likarolo tse arolelanoeng tsa lijo le lithethefatsi tsa lithethefatsi. Lejoe la sekhutlo la tloaelehileng, la sesosa sa sesosa sa ho lemalla lithethefatsi ke ho se sebetse litseleng tsa dopaminergic tse laolang mekhoa ea neuronal e amanang le boits'oaro, boemo ba maikutlo, khatello ea kelello, khatello ea moputso le tsusumetso e susumetsang [11]. Metabolism libakeng tsa prefrontal e ameha ka ho thibela ho thibela lijo, ha lihlooho tse ngata li sitoa ho fokotsa ho ja lijo ho kenyeletsa ghrelin 'me e ka' na ea e-ba sephetho sa ho fokotsa li-receptor tsa DA D2 tse amanang le ho fokotsa metabolism ea prefrontal [12]. Libaka tsa limbic le tsa cortical tse amanang le ho susumetsa, ho hopola le ho itšoara, li ts'oaroa ke ho khothaletsoa ka mpeng ho lihlooho tse ngata [10] le nakong ea takatso ea lithethefatsi litabeng tse nang le lithethefatsi tse lemaletseng lithethefatsi. Ho ba le kutloisiso e matla bakeng sa lijo tse utloisisang maikutlo ho nahanngoa ka ho eketseha ha metabolism kerekeng e tsitsitseng ea lihlooho tse ngata. Ts'ehetso e matlafalitsoeng ea lijo le ho fokotsa li-receptor tsa DA D2 li ka etsa hore lijo li be matla haholo bakeng sa ho ja lijo le ho ba le botenya haholo [10]. Liphello tsena tsa lipatlisiso li bontša hore lipotoloho tse ngata tsa boko li senyeha ka botenya le ho lemalla lithethefatsi le hore thibelo le phekolo ea botenya bo ka rua molemo ho maqheka a ntlafatsang mosebetsi oa DA.

Lindblom et al. [13] o tlaleha hore ho ja lijo e le leano la ho fokotsa boima ba 'mele khafetsa le hlōleha kaha le etsa hore litakatso tsa lijo tse lebisang ho binging le ho boima bo boima. Ba boetse baa lumellana hore bopaki bo tsoang lipatlisisong tse 'maloa bo bontša ho ba teng ha likarolo tse arolelanoeng tsa melaho ea lijo le lithethefatsi. Lindblom et al. [13] o ile a lekanyetsa polelo ea liphatsa tsa lefutso tse robeli tse amang karolo ea DA likarolong tsa boko bo amanang le mesolimbic le nigrostriatal DA tsamaiso ea liphoofolo tse ratoang tse nang le lijo tse sa foleng tse sebelisoang ka nako e tloaelehileng ea polymerase chain reaction. Ba ile ba fumana hore tyrosine hydroxylase ea mRNA, 'me motlakase oa dopamine sebakeng sa ventral tegmental e ne e eketseha haholo ka thibelo ea lijo le molao-motheo oa DAT ka nako e lekaneng ka sekhahla sa protheine sekhethong sa NAC hape se ne se hlokomeloa ka mokhoa oa ho iketsetsa maikutlo. Hore liphello tsena li ne li hlokomeloa ka mor'a hore li sa phekolehe ho e-na le ho thibela lijo tse boima li fana ka maikutlo a hore ho khothaletsoa ha litsela tsa mahlaseli a dopamine ho ka etsahala. Ka hona, ho hlohlelletsoa ke mocheso ho ka 'na ha e-ba ka lebaka la ho eketseha ha li-extracellular dopamine ho tloha ho NAc shell e ka' na ea e-ba e 'ngoe ea lisosa tsa litakatso tsa lijo tse thibelang ho latela phepo ea lijo. Liphuputso tsena li lumellana le liphuputso tsa pejana tsa Patterson et al. [14]. Ba bonts'a hore ho kenngoa ha insulin ka tsela e tobileng ho etsa hore ho be le keketseho ea mRNA bakeng sa mofetoleli oa DAT ea DA. Nakong ea 24- ho 36 hora ea ho thibela ho ja lijo tsa ho thibela lijo ho ne ho sebelisoa in situ ho hlahloba litekanyetso tsa mantlha tsa DAT ka likokoanyana tse sa amoheleheng (likokoana-hloko). Methati e ne e le ka ventral tegmental area / substantia nigra pars compacta e theohile haholo ho fana ka maikutlo a hore tekanyo ea ts'oaetso ea DAT e ka sebetsoa ka boemo ba phepo e nepahetseng, ho itima lijo le insulin. Ifland et al. [15] o ile a hatisa khopolo ea hore lijo tse sebetsitsoeng tse nang le likhahla tse phahameng tsa tsoekere le tse ling tse monate tse hloekisitsoeng, lik'habohaedreite tse hloekisitsoeng, mafura, letsoai le caffeine ke lintho tse lemalang. Liphuputso tse ling li 'nile tsa hlahloba letsoai e le ntlha ea bohlokoa moetlong oa ho batla lijo. Roitman et al. [16] e bontša hore ho fetisetsoa ha DA ho eketsehileng ho NAc ho amana le boitšoaro bo susumelletsang, ho akarelletsa le takatso ea lijo. Phetoho ea DA e fetisetsoa ke DAT mme e ka 'na ea kenya letsoho boitšoarong bo susumetsang. Lithutong tsa bona ka vivo, ho fokotseha ka matla ho ts'oaetso ea DA ka DAT khakong ea NAc e amanang le Na le takatso ea lijo e susumelitsoeng ke Na ho felisoa. Ho fokotsa mosebetsi oa DAT ho NAc ho ile ha hlokomeloa ka morao a vitro Kalafo ea Aldosterone. Ka hona, ho fokotseha ha mosebetsi oa DAT, ho NAc, ho ka ba le phello ea ketso e tobileng ea Aldosterone mme e ka ba mohato oo Na ho felisoang ho oona ho hlahisang moloko oa ho fetisetsoa ha NAc DA nakong ea lijo tsa Na. Ho eketseha ha NAc DA e ka 'na ea e-ba setša se susumelletsang rat ea Na-depleted. Tšehetso e eketsehileng bakeng sa karolo ea lijo tse nang le letsoai ha ho khoneha (lijo) tsa tlhekefetso li entse hore "Salted Food Addiction Hypothesis" e hlalositsoeng ke Likoekoe le Khauta [17]. Phuputsong ea lifofane, ho fumana hore na lijo tse nang le letsoai li tšoana le agonist e bonolo ea opiate e etsang hore ho be le phepo e matla ea boima le boima ba 'mele, ba fumane hore sehlopha sa batho ba itšetlehileng ka opiate se hlahisitse keketseho ea 6.6% ea boima nakong ea ho tlosoa ha opiate ho bontša ho rata lijo tse nang le letsoai. E itšetlehile ka lingoliloeng tsena le tse ling [18] ba fana ka maikutlo a hore Salted Food e ka ba ntho e lemalloang e susumetsang li-opiate le li-receptor tsa DA ka moputso le setsi sa boikhathollo sa boko. Ka tsela e fapaneng, khethollo, tlala, khothatso, le ho lakatsa lijo tse "monate" tsa letsoai li ka 'na tsa e-ba matšoao a ho tlosoa ha opiate le ho tlosoa ha opiate joaloka phello ea lijo tsa letsoai. Lijo tse nang le letsoai le ho tlosoa ha opiate li etsa hore lijo tsa Na, li hlahise lijo tse ngata, ho ja haholo le mafu a amanang le botenya.

Mosebetsi oa Bokooa Dopaminergic

Dopamine D2 sephatsa sa lefutso (DRD2)

Ha synaptic e fetoha, DA e susumelletsa batho ba amohelang li-DA (D1-D5), batho ba fumana khatello ea kelello le maikutlo a bophelo [19]. Joalokaha ho boletsoe pejana, tsela ea mesocorticolimbic dopaminergic e thusa ho matlafatsa meputso e sa tloaelehang le meputso ea tlhaho. Likoloi tsa tlhaho li matlafatsoa moeeng o kang ho lapa le ho ba le bana ha meputso e sa tloaelehang e kenyelletsa khotsofalo ea ho fumana menyaka e ithutoang, hedonic sensations e kang e fumanoang lithethefatsing, joala, papali ea chelete le mekhoa e meng ea likotsi [8,20,21].

E 'ngoe e tsebahalang ea liphatsa tsa lefutso la DA ke DR Genex, e leng eona e ikarabellang bakeng sa ho qaptjoa ha methapo ea DA D2 [22]. Tsela ea allelic ea liphatsa tsa DRD2 (A1 ho ea ho A2) e hlalosa palo ea li-receptor libakeng tsa mohaho oa li-post le hypodopaminergic function [23,24]. Bobebe ba li-receptor tsa DA bo etsa hore batho ba batle ntho leha e le efe kapa boitšoaro bo susumetsang tsamaiso ea dopaminergic [25-27].

Lefu la DRD2 le DA li 'nile tsa amahanngoa le moputso [28] ho sa tsotellehe khang [3,4]. Le hoja Taq1 A1 e fapane le liphatsa tsa lefutso la DRD2, e 'nile ea amahanngoa le mathata a mangata a neuropsychiatric' me qalong e e-na le tahi e tebileng, e boetse e amahanngoa le lithethefatsi tse ling tsa lithethefatsi le ts'ebetso, hammoho le Tourette's Syndrome, boits'oaro bo phahameng ba ho batla boitšoaro, Matšoenyeho a ho Hlokahala ha Matšoao (ADHD), le ho bana le ho batho ba baholo, ba nang le matšoao a matšoao a batho ba nang le khatello ea kelello ea boitšoaro bo bobebe [28].

Le hoja sehlooho sena se tla lebisa tlhokomelo litsing tsa lithethefatsi le lijo tse lemalloang, le karolo ea liphatsa tsa lefutso tsa DA le ho sebetsa ka ho lemalla, bakeng sa phetheho, re tla hlahloba ka bokhutšoanyane maikutlo a rona a amang liphatsa tsa lefutso tsa lithethefatsi tse ngata. "Moputso oa Khaello ea Matšoao" (RDS) e ile ea hlalosoa ka lekhetlo la pele ka 1996 e le mokhoa oa ho etsa liphatsa tsa lefutso, oa ho lemalla le o se nang boikemisetso ka ho hlokomela hore mefuta ea liphatsa tsa lefutso tsa DRD2 A1 e amana le boitšoaro bona [29-32]. RDS e kenyelletsa menyaka kapa tharollo e itšetlehileng ka DA. Litakatso kapa maemo a bakoang ke ho hanyetsa ha DA kapa ho senyeha ke pontšo ea RDS [30]. Ho haella ha moputso oa mali ho ka ba bonolo, phello ea ho tlōla tekano kapa khatello ea kelello kapa e matla haholo, phello ea khaello ea DA e thehiloeng ho liphatsa tsa lefutso. RDS kapa litsela tse khahlanong le moputso li thusa ho hlalosa kamoo liphatsa tse itseng tsa lefutso li ka hlahisang boitšoaro bo rarahaneng bo hlephileng. Ho ka 'na ha e-ba le tloaelo e tloaelehileng ea methapo ea kutlo ea pelo, methapo ea methapo ea pelo le ea neuroanatomy, bakeng sa mathata a mangata a kelello le lithethefatsi tse ngata. Ho tsebahala haholo hore lithethefatsi tsa tlhekefetso, lino tse tahang, thobalano, lijo, papali ea chelete le mekhoa e tsosang takatso e matla, e leng ho etsa hore ho be le ts'ebeliso e ntle le ho lokolloa ha pelo ea bokooa DA le ho fokotsa maikutlo a sithabetsang. Litakatso tse sa tloaelehang li amana le mosebetsi o tlase oa DA [33]. Mona ke mohlala oa mekhoa e rarahaneng e ka hlahisoang ke liphatsa tsa lefutso tse khethehileng. Ka lebaka la ho haelloa ke, mohlala, li-receptor tsa D2 ka lebaka la ho ba le phapang ea A1 ea liphatsa tsa DRD2 [34] e ka 'na ea etsa hore batho ba be le kotsing e khōlō ea litakatso tse ka khotsofatsoang ke boitšoaro bo bongata ba ho lemalla, bo se nang maikutlo le bo qobelloang. Ho haella hona ho ka eketsoa haeba motho eo a e-na le polymorphism e 'ngoe ka mohlala, e leng lefutso la DAT le entseng ho tlosoa ho feteletseng ha DA ho tloha synapse. Ho phaella moo, tšebeliso ea lisebelisoa le mekhoa ea ho ntša mpa e boetse e felisa DA. Ka lebaka leo, RDS e ka bonahala ka mefuta e matla kapa e bonolo e bakoang ke ho hlōleha ha lik'hemik'hale ho fumana moputso oa mesebetsi e tloaelehileng ea letsatsi le letsatsi. Le hoja liphatsa tse ngata tsa liphatsa tsa lefutso le li-polymorphisms li etsa hore batho ba be le mosebetsi o sa tloaelehang oa DA, bajari ba Taq1 A1 ea lefats'e la DRD2 ha ba na libaka tse lekaneng tsa menyetla ea DA bakeng sa ho fumana kutloisiso e lekaneng ea DA. Lekhahla lena la DA lefats'e la moputso la boko le ka fella ka takatso e sa nepahaleng le takatso. Ha e le hantle, ba batla lintho tse kang joala, li-opiate, cocaine, nicotine, glucose le boitšoaro; esita le mekhoa e sa tloaelehang e mabifi e tsejoang hore e sebelise litsela tsa dopaminergic 'me e baka ho lokolloa ha DA ho khethehileng ho NAc. Hona joale ho na le bopaki bo bontšang hore ho e-na le NAC, li-cortex tse ka hare li ka 'na tsa kenella ho sebetsa, ho etsa liqeto [35-37] le sebaka sa ho khutlela morao.

Mathata a liphatsa tsa DRD2 kapa liphatseng tse ling tsa DA, joaloka DRD1 e amehang ho homeostasis le eo ho thoeng ke ea bokooa bo tloaelehileng, e ka qetella e lebisa ho mathata a neuropsychiatric a kenyeletsang lithethefatsi tse sa tloaelehang le boitšoaro bo batlang ba lijo. Tšebeliso e mpe ea lithethefatsi pele ho bokhachane ho basali ba nang le bokhachane e bontšitsoe hore e na le liphello tse tebileng tsa boemo ba methapo ea kutlo ea bana. Tsena li kenyelletsa ethanol [38]; kankere [39]; heroine [40]; cocaine [41]; tšebeliso e mpe ea lithethefatsi ka kakaretso [42]. Morao tjena Novak le al. [43] o fane ka bopaki bo matla bo bontšang hore nts'etsopele e sa tloaelehang ea li-neurons tse hlaselang ke karolo ea maloetse a maholo a bakoang ke mafu a kelello. Bangoli ba ile ba fumana setša sa liphatsa tsa lefutso tse sa sebetsaneng (mathoasong) a rat e sa nang le litsela tsa bohlokoa tsa ho hlasela (ho bontša). Nakong ea libeke tse peli tsa bakhachane, marang-rang a theohile 'me a nkeloa sebaka ke marang-rang a liphatsa tsa lefutso tse hōlileng tse hlahisang liphatsa tsa lefutso tse amanang le lefuba, ho akarelletsa le li-receptor tsa DA D1 le D2 le ho fana ka li-neurons tsena ka boitsebiso ba bona ba sebetsang le litšobotsi tsa phenotypic. Ka hona, phetoho ena ea nts'etsopele ea rat le ea batho, e na le monyetla oa hore e be ntlha ea ho khelosoa ke ho senya ts'oaetso ka lintho tse tebileng tse kang ho noa haholo lijong, joaloka letsoai le tšebeliso e mpe ea lithethefatsi.

Motlakase oa Dopamine (DAT)

Motlakase oa DA (hape le DA ea sebetsang ka mafolofolo, DAT, SLC6A3) ke protheine e fokolang ka membrane e pomelang DA ea methapo ea mantle ho tsoa ho synapse ho ea ho cytosol eo ho eona ba bang ba tsebang ho fetisa li-DA le norepinephrine ho li-vesicle tsa neuronal bakeng sa ho boloka le ho lokolloa hamorao [44].

Protheine ea DAT e na le khopo ea liphatsa tsa lefutso tse teng ka chromosome ea batho 5 e ka bang 64 kbp e telele mme e na le khoeli ea khoeli ea 15. Ka ho khetheha, lefutso la DAT (SLC6A3 kapa DAT1) le sebakeng sa kromosome 5p15.3. Ho feta moo, ho na le polymorphism ea VNTR ka har'a sebaka sa 3 se seng sa coding sa DAT1. Lepolymorphism ea lefutso lefapheng la DAT le etsang hore palo ea protheine e bontšoe ke bopaki ba botsoalle pakeng tsa mathata a amanang le DA le DAT [45]. Ho totobetse hore DAT ke mokhoa o ka sehloohong o hloekisang DA ho tloha li-syntapses, haese ka prefrontal cortex moo DA e tsoelang pele ho akarelletsa norepinephrine [46,47]. DAT e felisa pontšo ea DA ka ho tlosa DA ho tsoa ho synoptic cleft le ho e beha ka lisele tse potolohileng. Habohlokoa, likarolo tse 'maloa tsa moputso le ho khetholla ke mesebetsi ea DA le DAT e fana ka taolo ea taolo ea DA [48].

Hoa hlokomeleha hore DAT ke protheine ea lera le lekanang 'me e nkoa e le motlatsi' me mo-transporter o susumetsa DA ho tloha synaptic cleft ho pholletsa le membrane ea seleng ea phospholipid ka ho kopanya leeto la eona ho tsamaisoang ke Ion tlase ho sesebelisoa sa electrochemical (facilitated diffusion) le ka seleng.

Ho feta moo, ts'ebetso ea DAT e hloka hore ho lumellane ho kopanetsoeng le ho tsamaisana ha li-ion tse peli le li-chloride ion tse peli le substrate ea DA. Sesosa sa DAT-mediated DA reuptake ke mahlaseli a mahlakoreng a ion a hlahisoang ke lera la plasma Na + / K + ATPase [49].

Sonders et al. [50] o ile a hlahloba karolo ea mohlala o amohelehang ka ho fetisisa bakeng sa mosebetsi oa ho tsamaisa monoamine. Ba fumane hore mosebetsi o tloaelehileng oa ho tsamaisa monoamine o hloka melao e behiloeng. Ka mohlala, li-ion li tlamehile ho tlama mohahong oa extracellular oa morekisi pele DA a ka tlama. Hang ha DA e kopanya, protheine e na le phetoho ea conformational, e lumellang Na le DA hore ba se ke ba koala lehlakoreng la intracellular la membrane. Liphuputso tse 'maloa tsa electrophysiological li tiisitse hore DAT e tsamaisa molek'hule e' ngoe ea methapo ea meriana ho pholletsa le membrane ka Noni e le 'ngoe kapa tse peli tse kang tse ling tse tsamaisang monoamine. Li-ions tsa chloride tse nkiloeng hampe li hlokeha ho thibela litefiso tse ntle tse hahang. Lithuto tsena li sebelisitse DA e nang le mahlaseli a kotsi, 'me li bontšitse hore lebelo la lipalangoang le tataiso li itšetlehile ka ho feletseng ka Na gradient [51].

Kaha ho tsebahala hore lithethefatsi tse ngata tsa tlhekefetso li etsa hore ho lokolloe DA neuronal [52], DAT e ka ba le karolo ho sena. Ka lebaka la ho kopanya ka thata ka matla a lera le Nadidient, liphetoho tse bakoang ke ketsahalo ka polase ea membrane li ka susumetsa haholo litekanyetso tsa lipalangoang. Ho phaella moo, morekisi a ka tlatsetsa DA ho lokolloa ha neuron e hlaphoheloa [53]. Ha e le hantle, joalokaha ho boletsoe ke Vandenbergh et al. [54] protheine ea DAT e laola tšebetso ea phekolo ea methapo ea mali ea DA ka ho bokella ka potlako DA e hlalositsoeng ka synapse.

Tlhōlisano ea DAT ea lesapo la mokokotlo e ne e le taba ea tlhaho, e thehiloeng ho latela tlhahlobo ea hydrophobic sequence le ho tšoana le mohoebi oa GABA. Ketsahalo e qalang ea Kilty et al. [55] ea sepakapaka se seholo sa extracellular pakeng tsa libaka tsa boraro le tsa bone tsa tse leshome le metso e 'meli tsa transmembrane li tiisitsoe ke Vaughan le Kuhar [56] ha ba sebelisa li-protease, ho cheka liprotheine ka likaroloana tse nyenyane, le glycosylation, e hlahang feela lintlheng tse ling tsa extracellular, ho netefatsa likarolo tse ngata tsa moralo oa DAT.

DAT e fumanoe libakeng tsa boko moo ho nang le lipalangoang tsa dopaminergic, libaka tsena li kenyelletsa litsela tsa mesocortical, mesolimbic, le nigrostriatal [57]. Nuclei e etsang litsela tsena e na le mekhoa e khethollang ea polelo. DAT ha ea ka ea fumanoa ka hare ho ntho leha e le efe ea synaptic e fanang ka maikutlo a hore ts'oaetso ea DA e tsoelang pele e hlaha ka ntle ho li-synaptic tse sebetsang ka mor'a hore DA e fapane le synaptic cleft.

Li-alleles tse peli, pheta-pheto ea 9 (9R) le 10 hape (10R) VNTR e ka eketsa kotsi bakeng sa boitšoaro ba RDS. Ho ba teng ha 9R VNTR ho amana le bothata ba tahi le ho sebelisoa ha lithethefatsi. Ho bonts'itsoe ho eketsa phetolelo ea protheine ea DAT e hlahisang bolokolohi bo eketsehileng ba synaptic DA, e leng ho fokotsang ho fokotseha ha DA, le ts'ebetso ea DA ea li-neurons tsa postsynaptic [58]. Mantsoe a pheta-phetoang a DAT a amana le kutloisiso ea moputso le kotsi e kholo ea ho Hlokomoloha ho Hlokahala ha Matšoao a Matšoao (ADHD) ho bana le ho batho ba baholo [59,60]. The 10-repeat allele e na le mokhatlo o monyenyane empa o le oa bohlokoa o nang le matšoao a ho ba le tšusumetso e matla (HI) [61].

Mapapa ea Moputso oa Genese le RDS

Tšehetso bakeng sa tlhaho e sa tsitsang ea batho ba nang le difaminergic liphatsa tsa lefutso le li-neurotransmitters tse ling (mohlala DRD2, DRD3, DRD4, DAT1, COMT, MOA-A, SLC6A4, Mu, GABAB) e tsoa litsing tse 'maloa tsa bohlokoa tse bontšang likotsi tsa liphatsa tsa lefutso bakeng sa mekhoa ea ho batla lithethefatsi tse itšetlehileng ka botsoalle le lithuto tsa ho kopanya tse amang li-alleles tsena e le likokoana-hloko tse kotsi tse nang le tšusumetso tsamaisong ea mesocorticolimbic (Lethathamo 1). Laboratori ea rona e kopanngoa le LifeGen, Inc. le Dominion Diagnostics, Inc. e etsa lipatlisiso tse nang le litsi tse leshome le metso e 'meli tse khethiloeng ho pholletsa le United States ho tiisa tlhahlobo ea liphatsa tsa lefutso tse kileng tsa etsoa ka molao e le hore ho khethoe kotsi ea mafu a lefutso bakeng sa RDS e bitsoang Genetic Addiction risk Score ™ ( GARS).

Table1 

Mokhethoa Moputso Genes le RDS - (Mohlala).

Ngolisa mongolo o ngotsoeng o latelang ebe u fumana melemo ea litlhaloso tsa sehlopha sa MAIL

ditshebetso tse botle bo ikhethang e

  • Sebaka sa molekane se sebetsang / se ka khonehang-ho fetolela pampiri ea hau lipuong tse etellang pele tsa lefatse la 50
  • Version ea phatlalatso ea pampiri e hatisitsoeng
  • Lihlooho tsa li-digital tsa ho arolelana le ho hlahloba

Lintlha tse khethehileng

  • Li-Journals tsa Open Access tsa 250
  • Sehlopha sa bahlophisi ba 20,000
  • Matsatsi a 21 a ho hlahloba ka potlako
  • Boleng le bohlophisi bo potlakileng, ho hlahloba le ho hatisa lingoliloeng
  • Tlhahisoleseding ho PubMed (e leeme), Scopus, DOAJ, EBSCO, Index Copernicus le Google Scholar joalo-joalo.
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  • Tlhōlo e molemo ho lihlooho tsa hau tse latelang

Ngolisa mongolo oa hau ho: http://www.editorialmanager.com/omicsgroup/

lumela hore baa fokola

Bangoli ba ananela tlhahiso ea litsebi tsa litsebi tsa Margaret A. Madigan le Paula J. Edge. Re ananela maikutlo a Eric R. Braverman, Raquel Lohmann, Joan Borsten, BW Downs, Roger L. Waite, Mary Hauser, John Femino, David E Smith le Thomas Simpatico. Marlene Oscar-Berman ke mofani oa liphallelo tse tsoang Mekhatlo ea Sechaba ea Bophelo, NIAAA RO1-AA07112 le K05-AA00219 le Lefapha la Phuputso ea Bongaka Lefapheng la Machaba a Veterans Affairs la United States. Hape rea lumela hore Karen Hurley, Mookameli ea ka Sehlopha sa National Institute of Holistic Addiction, North Miami Beach Florida o amohela tlaleho ea nyeoe. Karolong ena sehlooho sena se ne se tšehetsoa ke tlotla e kholo ea Path foundation NY ho Life Extension Foundation.

Mongolo o botlaaseng ba leqephe

Ena ke sehlooho se bulehileng sa ho finyelloa tlas'a melao ea License ea Creative Commons Attribution, e lumellang hore ho sebelisoe, ho abeloa le ho thibela ho thibela mekhoa eohle, ho fana ka moqolo le mohloli oa pele.

Khohlano ea Thahasello Kenneth Blum, Ph. Dominion Diagnostics, LLC, North Kingstown, Rhode Island hammoho le LifeGen, Inc., ba nkile karolo ka mafolofolo ntlafatsong ea khoebo ea GARS. John Giordano le eena ke molekane ho LifeGen, Inc. Ha ho na likhohlano tse ling tse khahlisang mme bangoli bohle ba balile le ho amohela sengoloa sena.

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