Boitšoaro le Tsela ea Potoloho e thehiloeng Tlokotsing ea Tsoekere Lipakeng (2009)

. Mongolo o ngotsoeng ka letsoho; e fumanehang ho PMC 2015 Mar 16.

PMCID: PMC4361030

NIHMSID: NIHMS669567

inahaneloang

Phapang lipakeng tsa bokhoba ba tlhaho le bokhoba ba lithethefatsi e ea khahlisa ho tsoa linthong tse ngata, ho kenyeletsoa le maikutlo a mahlale le a bongaka. "Lithethefatsi tsa tlhaho" ke tse thehiloeng ts'ebetsong ea sistimi ea boits'oaro, joalo ka e laolang metabolism, ho iphelisa le ho ja ho fihlela matla a lekane. "Lithethefatsi tsa lithethefatsi" li kenya tšebetsong mekhoa e mengata ho latela litlhare tsa bona. Tlhahlobo ena e tšohla lipotso tse latelang: (1) Lijo li hlahisa tahi ea tlhaho neng? Tsoekere e baka matšoao a tahi haeba maemo a kemiso a loketse ho baka ho itlopa joala. (2) Hobaneng ha boitšoaro bo ts'oanang le bokhoba bo hlaha? Ho itlopa joala ka tharollo ea 10% ea sucrose ho ntša dopamine khafetsa ka har'a li-nucleus accumbens, 'me ho liehisa ho lokolloa ha acetylcholine, ka tsela eo ho chechisa satiety. Ho nka karolo ha opioid ho bonts'oa ke ho hula ka lebaka la naloxone kapa khaello ea lijo. Ho itlopa joala, ho ikhula le tšusumetso e bakoang ke ho ithiba ho hlalosoa e le motheo oa potoloho e mpe e lebisang ho ja haholo. (3) Ke lijo life tse ka lebisang bokhobeng ba tlhaho? Mefuta e fapaneng ea tsoekere, saccharin le phepo ea sham li bapisoa le ho itlopa lijo tse nang le mafura a mangata, tse bonahalang li sena tšobotsi ea ho ntša tsoekere ea opioid. (4) Ho lemalla lijo tsa tlhaho ho amana joang le botenya? Low basal dopamine e kanna ea ba sesosa se tloaelehileng, se lebisang ho "jella dopamine." (5) Ka mohlala oa methapo ea kutlo, li-accumbens li hlahisoa li na le litsela tse arohaneng tsa tlhahiso ea GABA ea ho atamela le ho qoba, ka bobeli e laoloang ke dopamine le acetylcholine. Liphetho tsena le tsona li laola tokollo ea lateral hypothalamic glutamate, e qalang lijo, le tokollo ea GABA, ee emisang.

Keywords: dopamine, acetylcholine, accumbens, binge, bulimia

LITLHAKISO TSA NTLE LE DIABOLA

Tlhaloso ea temallo e bulehile ho ngangisano. Pono ea pejana e hlalositse bokhoba ba lithethefatsi e le ka lebaka la ho haelloa ke matla, ho etsa hore bokhoba ba motho bo be le boitšoaro. Hamorao, ho lemalla ho ile ha hlalosoa ka mantsoe a kajeno a neuropsychopharmacology e le "lefu" le hlahisoang ke liphetoho tse sa feleng tsa ts'ebetso ea boko tse fetolang mokhoa oa boithaopo ho fetoha tloaelo e sa laoleheng. Pono ena ea bokhoba ba lithethefatsi e le lefu-mmuso e tlosa qoso ho motho eo ho ea ho sethethefatsi; leha ho le joalo, maikutlo ka bobeli a bontša pheletso e lebisa ho maemo a khothalletsang a boitšoaro le tahlehelo ea taolo. Haufinyane, ho bile le motsamao o lebisang ho litlolo tsa lithethefatsi le ho fana ka maikutlo a hore temallo, ho kenyelletsoa le ts'ebeliso ea liketsahalong tse kang ho ja kapa boitšoaro ba thobalano, e entsoe e le matla a sa tloaelehang, litakatso tsa boithabiso.- Buka ea Diagnostic and Statistical Manual of Mental Disrupt e khelositse taba ea ho lemalla, ka setotsoana, 'me ea tsepamisa mohopolo oa "ho ts'epa," ka tšebeliso e mpe ea bophelo, tlhekefetso ea lithethefatsi e le letšoao la tlhahlobo. Boitšoaro bo sitisang motho bo tsoela pele le ha a e-na le tsebo ea mathata a 'mele kapa a kelello a phehellang, a ka bakoang kapa a eketsoa ke ntho ea tlhekefetso. Hona joale liphatlalatso li ntse li hlaha ka tebello ea buka e tlang ea tlhahlobo ea tlhahlobo. Maikutlo a rona, a thehiloe haholo ho bopaki bo tsoang lipatlisisong tsa liphoofolo tsa laboratori, ke hore ho lemalla tsoekere e kanna ea eba bothata mme ho ka kenyelletsa liphetoho tse tšoanang tsa neural le liphetoho tsa boitšoaro joalo ka bokhoba ba lithethefatsi., Liphetoho tsena li bonoa maemong a ho fepa ka nakoana, ho ka fetisoang ka laboratoring. Boemo bo haufi haholo ba batho ba mofuta oa phoofolo ea rona ea laboratori e ka ba bothata ba ho ja kapa bulimia mothosa. Ho hlahisitsoe bopaki ba ho lemalla bakuli ba nang le mathata a ho ja., Lithuto tsa monahano oa Brain li lebisitse tlhokomelo phetohong e kang ea bokhoba ba lithethefatsi ho baahi ba batenya, moo likotsi tsa kelello tsa ts'epahalo li eketsoang ke likotsi tsa bongaka, ho kenyelletsa ho senyeha ha pelo le lefu la tsoekere la mofuta oa 2.,

Ho utloisisa "bokhoba", motho o tlameha ho supa lits'ebetso tsa neural tse e bakang. Lithethefatsi tse lemalloang, ka karolo e itseng, ka lits'ebetso tse iphetotseng bakeng sa boits'oaro bo itlhommeng pele kapa mohlomong ba ho ba le bana. Hona ho bolela hore temallo ea mekhoa e itseng ea boits'oaro e kanna ea ba ea hlaha ka melemo ea liphatsa tsa lefutso tse khethileng liphoofolo tse nang le lits'ebetso tse hlophisitsoeng tse fumanehang ka mokhoa o hlophisitsoeng. Haeba ho joalo, ho na le mefuta e meholo ea bokhoba ba 2, eo ka bobeli e ka bang khatello le ka linako tse ling e le kotsi: (1) boits'oaro bo pholohileng, joalo ka bo ka lebisang boits'ebetsong bo kotsi ba ho ja le ho nyaloa le (2) boits'oaro bo bobe bo fetelang kahare ho ts'oaetso e tloaelehileng. matšoao a boloi a hlasimollang lits'ebetso tsa moputso, joalo ka lithethefatsi tsa tlhekefetso.

Ka bokhutšoanyane, bokhoba ba tlhaho bo ka hlaha ha ts'usumetso ea tikoloho e sebetsa ka tsela e boletsoeng, e tloaelehileng ea li-receptor system, joalo ka tsoekere e sebetsang ka li-gluselceptors. Maemong ana, "sistimi" e amehang ke e ileng ea iphetola ka tšebeliso ea matla joalo ka molemong oa ho pholoha. Ho lemalla lithethefatsi ho ka bakoa ke metsoako e ka tlisoang ke ho kenella ha maikutlo le ho sebetsa ka har'a sistimi e khethiloeng ka ts'ebetso ea methapo ea kutlo. Kahoo, lithethefatsi tse joalo ka li-psychostimulants kapa opiates li ka kenya tšebetsong lits'ebetso tse ngata ka mesebetsi e fapaneng ea ho ikoetlisa. E ne e tla ba ho sa utloahale ho bolela hore ke lithethefatsi feela tse ka lemalloang, haeba ho ka pakoa hore tšusumetso ea tlhaho, e kang ts'ebetso ea ts'ebetso ea taolo ea matla, e ka lekana bakeng sa ts'ebetso ea lits'ebetso.

SUGAR E BONTODA KAMOO LEFAT ?E LE NANG? HO JA HO BINGES HO KA ETSA TLHOKOMELISO

Kamora lilemo tsa 10 tsa ho etsa lipatlisiso ka ho lemalla tsoekere,,, re ntse re sebelisa mokhoa o tšoanang oa ho fumana matšoao a hlakileng a phepelo ea lijo ka ho beha kemiso ea ho fepa e phehang hangata ho itlopa joala ka mor'a nako ea ho itima lijo. Mefuteng ea rona ea liphoofolo ea ho itlopa lijo tse tsoekere, "ho itlopa joala" ho hlalosoa e le sejo se seholo se sa tloaelehang, ha se bapisoa le liphoofolo tse jang lijo tse tšoanang tsa papatso. Nako, thibelo ea lijo ea hora ea 12 e sebelisoa ho theha tlala le tebello ea ho ja. Ebe liphoofolo li fuoa tsoekere ea 25% (kapa 10% sucrose ho etsa mohlala oa tsoekere e ngata e nooang) hammoho le litoeba tsa tsona. Monyetla oa ho qala lijo tsa pele tsa letsatsi o liehisoa ke lihora tsa 4 ho feta nako eo ba neng ba tla be ba qalile ho ja pele ho lefifi. Nakong ea libeke tse 3, thibelo ena ea lijo ea letsatsi le letsatsi le ho lieha ho fepa ho fella ka 32% ea phepo ea khalori e tsoang ho tsoekere. Likhoto lenaneong lena la tsoekere le chow la letsatsi le leng le le leng la lihora tse 12 li eketsa phepelo ea bona ea letsatsi le letsatsi ea tsoekere nakong ea libeke tsa phihlello. Hoa thahasellisa ho hlokomela hore likhoto tse ling tse nang le phihlello ea lihora tse 12 ho tsoekere ha li nke feela lijo tse kholo qalong ea phihlello empa hape li itlopa ka boithaopo nakong eohle ea phepo.

Likhoto tse nang le phihlello ea lipapatso ho tharollo ea tsoekere ke sehlopha sa bohlokoa sa taolo. Ba noa tsoekere le nakong ea karolo e sa sebetseng, e bobebe. Liphoofolo tsena li sebelisa phepelo e lekanang ea tharollo ea tsoekere joalo ka likhoto; leha ho le joalo, e phatlalalitsoe nakong ea lihora tsa 24. Ha re bone bopaki ba boits'oaro ba ho ja ho itlopa lijo ka tsoekere ea ad libitum. Ka lebaka leo, ha li bonts'e matšoao a ho ts'epa. Kahoo, ke kemiso ea nakoana ea ho fepa e bonts'ang e le bohlokoa bakeng sa ho phehella ho itlopa lijo le matšoao a latelang a ho ts'epa. Ho Setšoantšo sa 1Ho itlopa joala ho bontšoa e le mohato oa pele tseleng ea ho lemalla.

Tšoantšiso 1 

Pontšo ea merero e sebelisitsoeng ho khetholla lintho tsa tlhekefetso joalo ka ha ho hlalositsoe ke Koob le Le Moal. Re sebelisitse lintlha tsena thutong ea bokhoba ba lijo. Ho fihlella tharollo ea tsoekere letsatsi le leng le le leng ho lebisa ho kulang le ho ts'oaroa ha opiate ...

KE HOBANE'NG HA SUGAR BINGEING RESULT IN DITLHAKISO TSA BATHO BA BANG?

Ho itlopa lijo ho baka ho phetoa khafetsa, dopamine (DA) le ts'usumetso ea opioid e lateloang nakong ea thibelo, ka liphetoho tse tsoelang pele tse ntlafatsang monyetla oa ho oela hape.

Phokotso ea Opioid le lipontšo tsa ho tlohela

Papiso ea tšebeliso ea lithethefatsi tsa tsoekere le tšebeliso ea lithethefatsi e hlahlojoe ka botlalo., Libekeng tse 'maloa feela lenaneong la phepelo ea lijo tsa tsoekere ea 12, li-rats li tla bonts'a matšoao a "ho khaola" ho arabela le ezinexone (3 mg / kg sc), e bonts'ang ho nka karolo ha opioid' me e fana ka maikutlo a ho itšetleha ka "opioid" . ” Ho tlohela ho boetse ho bonahala ntle le naloxone, ha lijo le tsoekere ka bobeli li haneloa lihora tsa 24.,, Boitšoaro ba rona ba bongata ba li-polymerase reaction reaction (qPCR) le bopaki ba bohloeki 'meleng oa likotlo tse nang le tsoekere bo bonts'a ts'ephalin mRNA le li-mureceptor tse tlatselletsang bokong ba nyutlelie (NAc). Sena se fetoleloa ho bolela hore ho itlopa joala khafetsa ka tsoekere ho lokolla li-opioids, joalo ka enkephalin kapa beta-endorphin, 'me boko bo sebetsa ka ho fana ka litlhaloso tse fokolang tsa li-peptide tsena tsa opioid libakeng tse ling. Mohlomong lisele tsa postynaptic li arabela ka tlase ho li-peptide tsena ka ho hlahisa kapa ho pepesa li-receptor tse ling tsa mu-opioid. Haeba li-receptors li koetsoe ke naloxone, kapa likhoto ke lijo, liphoofolo li bontša ho tšoenyeha ka tsela e phahameng le e 'ngoe., le khatello ea maikutlo teko ea ho sesa (Kim et al, e sa phatlalatsoang). Liphetoho tsena tsa boitšoaro le tsa methapo ea kutlo ke matšoao a amohelehang a "ho tlosoa" joalo ka mefuta ea liphoofolo.

Dopaminergic Adaptation le Matšoao a Sensitization

Sistimi ea opioid ka hare ho mpa ea bohareng e na le boikarabello ba ho hlasimolla lisele tsa DA nakong ea ts'ebeliso ea lijo tse matlafatsang haholo., Likarolong tse fapaneng tsa striatum, ho itlopa joala ka tsoekere ho fella ka keketseho ea DA e tlamang li-receptor tsa D1 hammoho le ho fokotseha ha D2-receptor binding. Sena se kanna sa etsahala hobane ho loana ka 'ngoe ho lokolla DA ka ho lekana ho phahamisa maemo a tsoang kantle ho 123% ea basement., Ho fapana le mekhoa e tloaelehileng ea ho fepa, ho lokolloa ha DA ka lebaka la ho itlopa lijo ha ho fokotse ka lijo tse phetoang hangata, joalo ka ha ho tloaelehile ka lijo tse seng li sa ntsane., Joalokaha re bona ho Setšoantšo sa 2, maemo a thibelo ea ho fokotsa litšenyehelo a behiloeng ke mokhoa oa rona oa ho ja o jang o baka tšubuhlellano ea DA, le kamora matsatsi a 21 a ho pepeseha letsatsi le letsatsi. Maqhubu a phetoang khafetsa a DA a ka fetola tlhahiso ea liphatsa tsa lefutso le mekhoa ea methapo ea kutlo ea postynaptic neurons, hangata e lebisang ho li-adaptation tsa neural tse lekanyetsang ts'usumetso e kholo ea DA.

Tšoantšiso 2 

Likhoto tse nang le phihlello ea nako le nako ea ho lokolla tsoekere ho DA mabapi le ho noa sucrose bakeng sa metsotso ea 60 ka letsatsi 21. DA, joalo ka ha e lekantsoe ke vivo micodialysis, e eketseha bakeng sa lipakeng tsa sucrose le litekanyetso tsa letsatsi le letsatsi (mekotla e bulehileng) ka matsatsi 1, 2, le 21; ka papiso, ...

Ts'ebetso e phetoang hangata ea psychostimulant ea sisteme ea mesolimbic e baka tšusumetso ea boitšoaro.- Bopaki bo fana ka maikutlo a hore ts'ebetso ea mesolimbic DA le eona e fetotsoe ke ho itlopa joala. Phephetso ea amphetamine e baka li-hyperactivity tsa locomotor litekong tse nang le nalane ea ho itlopa lijo ka tsoekere. Tšusumetso e etsahetse matsatsi a 9 kamora hore likhoto li emise ho itlopa lijo, li fana ka tlhahiso ea hore liphetoho mosebetsing oa DA li tšoarella. Ka lehlakoreng le leng, ha likhoto li khothatsoa ke liente tsa letsatsi le letsatsi tsa amphetamine, li bonts'a matsatsi a 10 kamora nako ea ha ba e-noa tsoekere. Re fetolela sena ho bolela hore liente tsa tsoekere le ente ea amphetamine li natefisa ts'ebetso e ts'oanang ea DA, e fella ka maikutlo a sefapano-maikutlo.

Matšoao a susumetsang hore re se ke ra etsa letho a ho Khothatsa

Litholoana tse ling tsa nako e telele tsa ho itlopa lijo tse tsoekere li kenyelletsa a) khatello e matlafatsang ea tsoekere ka mor'a libeke tsa 2, b) ho ja joala bo ithaopileng ka ho itšepa ka likhoto tse nang le nalane ea ho itlopa joala ka tsoekere, le c) karabelo e ntlafalitsoeng ea likhatiso tse amanang le tsoekere. Maemo ana a bitsoa "phello ea ho fokolisa" tsoekere, "ts'ebetso ea joala" le "cue" incubation athari, "ka ho latellana. Tsena li etsahala kaofela nakong ea ho itima lijo, libeke kamora ho ts'oaroa tsoekere letsatsi ka leng. Hobane li bonoa nakong ea ho khaotsa ho tsuba, ho hohela ho li beha ka lihlopha joalo ka matšoao a "ho lakatsa." Ka mokhoa o hlokolosi, li ka talingoa e le lipontšo tsa khothatso e ntlafalitsoeng, e leng karolo ea bohlokoa ea ho khutlela bothateng ba tlhekefetso ea lithethefatsi.,,

Ka bokhutšoanyane, tsoekere e na le lintho tse lemalloang joaloka psychostimulant le opiate. Tšusumetso ea sefapano le amphetamine ho hlakile hore ke dopaminergic ebile e bohlokoa mehatong e meng ea ho lemalla. Leqoetha le hlohlelletsang le ts'oaetso ea ts'oaetso ea ho thibela ts'oaetso bakeng sa ho thibela mekhoa e amanang le tsoekere e na le likarolo tsa opioid. Sena se lebisa tlhokomelong ea hore ho itlopa joala ka tsoekere ho fella ka matšoao a boits'oaro le methapo ea kutlo ea takatso e feteletseng ea dopaminergic le opioid, tse tlatsetsang phetohong ea nako e telele boits'oarong bo khothalletsang (Feie. 1).

Ho qobelloa le ho ba le mathata a bophelo li bonahala ho batho ba bang ba nang le bothata ba ho ja ka thata, bulimia mothosa, kapa botenya; ka hona, batho ba bang ba kanna ba "itšetleha" ka Diagnostic le Statistical Manual ea Mental Disfall criteria. Sena se hlahisa potso e totobetseng: na ba na le tahi ea lijo? Moetso oa liphoofolo o boletsoeng ka holimo o bontša hore ho ka etsahala hore batho ba jang ba kulang haholo le bo-'mampoli ba ka lemalla tsoekere, empa sena ha se hlalose mathata ohle a ho ja kapa botenya leha ho le joalo ho phatlalalitsoe ka sehlooho sena se inahaneloang haholo.-

KE LINTHO TSE NANG TSE LI BONOLO HANGATA? HO na le ntho e 'ngoe e ikhethang e buang ka SUGAR

Sugar

Ho na le lintho tse ngata tse tlisoang ke ho lemalla lijo eseng feela thibelo ea lijo le ho itlopa lijo. Mofuta oa limatlafatsi tseo phoofolo e e kenyang le ona o bohlokoa. Lithuto tsa rona tsa bokhoba ba lijo li shebile haholo tsoekere (sucrose kapa glucose). Liphetho tse ntle li ka amana le tsoekere e le limatlafatsi tse khethehileng. E na le mokhoa oa eona oa ho amohela leleme,, mala,, sebete, manyeme, le boko. Li-Glucoreceptors li fana ka leseli le bolokang bophelo ho sistimi ea boitšoaro ba ingestive le lithuto tsa eona tse amanang le eona, maikutlo, le ts'usumetso. Monyetla oohle, ho lemalla tsoekere literekeng ho hlahisoa ke ts'ebetso e fetelletseng ea ts'ebetso ea maikutlo a tsoekere.

Saccharin le tatso e monate

E ka ba ho khahlisang ho leka litlolo tse monate tsa maiketsetso ho bona hore na motsoako o monate oa molomo o lekane ho hlahisa ts'ehetso. Re sebelisitse phepelo ea hora ea 12 nako le nako ea 0.1% saccharin ho etsisa tatso ea "seno se bobebe sa ho ja." Kamora matsatsi a 8 a regimen ena ea lijo, liphoofolo li ne li fuoe lijo le saccharin ka lihora tsa 36, ka matšoao a amanang le ho tšoenyeha ho tšoaea lihora tsohle tsa 12. Ho tlosa likhoto tsa lijo le saccharin ho lebisitse liketsahalong tse ngata tsa ho oma ha meno, ho sisinyeha ha hlooho le ho thothomela hoa pele ho nako ea 36hour. Naha ena e fetohileng e ile ea hanyetsoa habonolo ke 5 mg / kg ea morphine kapa ho fihlella tharollo ea saccharin (Hoebel le McCarthy, e sa phatlalatsoang). Ka hona, re belaela hore ho itlama ka sebopeho sa saccharin ho ka tsosa ho ts'epa ho ts'epahale le dopamine, joalo joalo ka sucrose. Sena ha se makatse, ha ho fanoa ka lipatlisiso tse pharalletseng ka laboratoring ea Carroll tse fanang ka maikutlo a hore saccharin e ka nka sebaka sa koae, 'me ho rata sa saccharin ke letšoao bakeng sa ho lemalla., Ts'ehetso e ngoe ea boleng bo matlafatsang ba saccharin, le kamano ea eona le ts'ebeliso ea lithethefatsi, e tsoa ho Ahmed le basebetsi-'moho le uena, ba bonts'itseng hore likhoto tse ling li khetha saccharin ho itlhokomela ka koae.

Mokhoa o mong oa ho lekola matla a monate oa tsoekere ntle le likhalase tse kopaneng ke ho hlatsoa mpa ka ho bula fistula ha likhoto li ntse li noa 10% sucrose. Joalo ka ha motho a ne a ka lebella, lino tse tahang li sebelisa tsoekere e ngata ka lebaka la ho haelloa ke lipontšo tse matla. Kamora libeke tsa 3 tsa ho ja sham-binge, tatso ea lijo tsa shamose e sa ntse e tla eketsa DA ea kantle ho 131% ea basement.

Lik'habohaedreite tse Khefutsang

Ho ja ka mokhoa oa 'nete oa sucrose mohlomong ho hohela ho feta tekanyo ea saccharin kapa sham, hobane bopaki bo bongata bo bontša hore li-glucose receptors le lintlha tse ling tsa morao-rao li bohlokoa bakeng sa moputso oa tsoekere o bonahatsoang ka mokhoa o ratoang oa tatso. Lisebelisoa tse amanang le ho fepa li-intragastric li khethoa, mme ba lokolla accumbens DA.- Re phethela motheong oa lithuto tsena tse fanang ka maemo a hore li-carbohydrate postingestive cues li ka kenya letsoho ho DA kapa ho lokolloa ha opioid e bakiloeng ke tsoekere nakong ea ho hapa, ho e lokisa le ho e khutlisetsa hape.

Tšobotsi e makatsang ea Mafura

Re ile ra makatsoa ke ho sitoa ha rona ho fumana ho tšoenyeha ho tlisoang ke naloxone ho sebelisa tlhahlobo e kholo ea sesepa e le sesupo sa boemo ba ho tlohela chelete likotong lijong tse nang le mafura a mangata. Ho tlohela ho ile ha atleha ho hlaha ho likhoto tse fuoeng mafura a meroho (Crisco) hammoho le li-pellets tse tloaelehileng tsa chow, kapa ba fuoa phepelo e phethahetseng ea phepo e ntle ea li-pellets tse phahameng, tse nang le mafura a mangata. Mafura a hloekileng a meroho le li-pellets tse nang le mafura a mangata li ne li nooa ka matla kemisong ea ho itlopa lijo. Mohlomong liphoofolo li ne li sa itšetleha ka mafura kapa e ne e le mofuta o mong oa tlhekefetso o sa hlahiseng ho tlosoa joalo ka opiate. Mabapi le ho tlohela, mafura a kanna a ba le tsoekere joalokaha cocaine e le ho heroin; ka mantsoe a mang, ho na le mekhoa e fokolang e ka bonoang ea ho khaotsa ho tsuba le koae ha e bapisoa le heroin, ka mokhoa o ts'oanang, mafura a bapisoang le tsoekere. Ka lebaka lena, re na le khethollo ea ho batla matšoao a ho khaotsa ho tšoana le ho likhoto tse tlisoang ke tsoekere. Haeba sistimi ea opioid e sa senyehe ho isa tekanyong e kholo ea litheko tse tsoang ho mafura, joale matšoao a ho khaola a kang opiate a ke ke a hlaha. Le ha ho hlakile hore tsoekere e lokolla li-opioid tse eketsang lijo,, mafura a kanna a se sebetse ka tsela ena. Mafura ha a nyenyefatse ho feta kh'aloriamo, khalori ea khalori, empa tsoekere e hlile e hatella satiety, feela joalokaha e ka hatella bohloko le ho se khotsofale ka kakaretso., Re boetse re nahanne hore li-peptide tse susumetsoang ke mafura joalo ka galanin, tse bonts'ang polelo ea mRNA e eketsehang ho arabela lijo tse nang le mafura a mangata hape e sitisang lits'ebetso tse ling tsa opioid, ka tsela eo, e ka fokotsa ho ntshwa hoa tsoekere bo thehiloeng ho tsoekere. Kahoo, le ha mafura a bonahala a sa hlahise litheko tse thehiloeng holima opioid, e kanna ea eba litlatse, empa ka tsela eo re seng re sa e lekanye.

NA HO NA LE LITLHAKU TSE LING TSE BONANG HO ETSA LIJO LE TLHAKISO? E itšetleha ka DIET

Ho Tlatsa kapa Ho Tlatsa Khase ka Glucose, Uena U le Mong, Ha e Lebatse Ho Nona

Mabapi le boima ba 'mele ka kakaretso, liphuputso tse ling li fumane hore ho itlopa joala ho mafura kapa tsoekere ha ho felle ka ho fokola ha mmele.,- athe ba bang ba bontšitse keketseho ea boima ba 'mele.- Ka laboratoring ea rona, likhoto tse itlotsang tsoekere kapa sucrose li bonts'a matšoao a tšoanang le a liphoofolo tse sebelisang lithethefatsi tsa tlhekefetso, joalo ka ha li hlalositsoe kaholimo, 'me li sebeletsa e le mehlala ea liphoofolo tse lemalloang tsoekere, empa li buseletsa lik'hilojule tsa tsoekere ka ho ja tlase chow laola boima ba 'mele ea bona., Sehlopha sa taolo se nang le phihlello ea ho lumelisa tsoekere se boetse se lekana ho ja ha sona caloric e le hore se se ke sa nona haholo.

Ho itlopa mmele o monate ho eketsa Boima ba 'Mele

Le ha liphoofolo li itlopa joala ka tharollo ea tsoekere ea 10% li bonts'a matla a ho laola boima ba 'mele, tse tsoaloang lijong tse tšoanang tsa ho itlopa lijo, empa ka mohloli o monate oa lijo tse nang le mafura a mangata, li bonts'a ho nona. Liphoofolo tse fuoeng lihora tsa 2 tsa ho ja lijo tsena tse matlafatso li ile tsa bonts'a mekhoa e kulang, leha li ne li na le phihlello ea libitum ho fumana lijo tse phetseng hantle bakeng sa letsatsi. Boima ba 'mele bo ile ba eketseha ka lebaka la lijo tse matla tse jang,' me ea fokotseha pakeng tsa ho loana ka lebaka la ho ja ka tsela e tloaelehileng. Leha ho le joalo, ho sa tsotellehe liphetoho tsena tsa letsatsi le letsatsi ka boima ba 'mele, liphoofolo tse nang le phihlello ea mafura a monate letsatsi le leng le le leng li ile tsa nona haholo ho feta sehlopha sa taolo se nang le phihlello ea lib lib ho standard chow. Sena se ka re thusa hore re utloisise hore na ho ja ho feta tekano le ho nona ho amana kae.

Dopamine ea Basal e tlase

Ho hlahloba thuto ea hore batho ba bang ba motenya ke makhoba a lijo, re hloka litoeba tse ngata. Mosebetsi o mongata ka laboratoring ea Pothos o bonts'a hore likhoto tse nang le botenya bo feteletseng le litheko tse bobebe tsa lijo tse bobebe li na le DA e tlase ebile e sitisa ho lokolloa ha DA. Sena se nahanoa hore se na le lisosa tse amanang, ka karolo e 'ngoe, le liphetoho tse amanang le boima ba insulin le kutlo ea leptin taolong ea ho ts'oaroa ha lisele tsa DA., Rea tseba hore litoeba tse se nang phepo phepong e lekantsoeng le tsona li na le DA ea tlase e tlase. Kahoo, ho bonahala eka liphoofolo tse nang le boima bo tlase le tse tlase li ka ba li-hyperphagic e le mokhoa oa ho khutlisetsa boemo ba tsona ba kantle ho DA. Sena ke se khahlisang ho likhoto tse ipehang cocaine ka tsela e bolokang DA e phahamisa. Ebile, likhoto tse jang lijo tse tsoekere tse nang le lijo tse thibetsoeng ho isa tekanyong ea boima ba 'mele li lokolla DA ho feta kamoo e tloaelehileng ha li lumelloa ho itlopa lijo hape, ka hona li tla phahamisa boemo ba tsona ba DA.

MOSEBETSI O MOTSOALLE OA HO BONAHALA OA HO BONAHALA

Ka lebaka la hore ho itšetleha ka tsoekere, joalo ka botenya, ho amana le maemo a mabe a DA le tokollo ea lijo e hlahisoang ke DA, re hloka mohlala o bonts'ang karolo ea karolo ea DA lithutong tsa boits'oaro. Motho a ka lebella hore potoloho ena e sebelisane le lits'ebetso tsa opioid. Re hlahisitse mofuta oa mokhoa oo NAc e arotseng litheko tsa GABA bakeng sa tšusumetso e ts'oanang le liphetho tse tlalehiloeng hantle ka har'a dorsal striatum bakeng sa pina. Joalokaha ho se leka-lekane ha neurotransmitter tsamaisong ea makoloi ho lebisa ho Huntington Chorea le lefu la Parkinson,, ho se leka-lekane ha neurotransmitter ho li-accumbens ho ka amana le khatello e akaretsang ea khatello ea maikutlo le khatello ea maikutlo. Maemo a ikhethang a ka bonahala e le hyperphagia le anorexia. Ho nka lintlha tsa rona ho tsoa ho lingoliloeng tsa lefu la Parkinson, re fana ka maikutlo a hore ho na le tsela ea ho bokella lintho tsa GABA tse bokelletsoeng bakeng sa tšusumetso e ntle ea "ho ea" ("atamela"), ho kenyelletsoa mokhoa oa ho ithuta le boitšoaro bo bobe, 'me e ngoe ka tšusumetso e mpe, "ho se ee" ho kenyelletsa ho hloea., Ha u shebana le khetla, tsela e lebisang ho eona e tla ba "tsela e otlolohileng" e nang le dynorphin le Substance P e le mekhabiso. Mokhoa oa ho qoba o tlameha ho sebelisa enkephalin e le setsi se kopantseng 'me o nka "tsela e sa tobang" ho ea ho thalamus le "cyb" bohareng. Li-loops tsa Cortex-striatal-pallidum-thalamus-cortex li ka potoloha makhetlo a 'maloa ka ho phahama, ho tloha lits'ebetsong tsa kelello ho isa liketsong tsa makoloi. Litsela tsa Striatal-midbrain le tsona li hlalositsoe e le sebaka sa moea, ha khetla e susumetsa karolo ea mantlha, e susumetsang medri striatum ebe dorsallateral striatum. Sena se tlisa bohareng ba "vitb" bo ntseng bo nyoloha le DA le Gaba neurons ka har'a schema hore kelello e fetoloe. Ka kotloloho kapa ka kotloloho menyetla ea ho bokella le tsona li fihla ho hypothalamus. Ho hypothalamus ea morao, litlatsetso tsa glutamate li qala ho ja mme GABA ea e emisa. Sena se bontšitsoe ke li-microinjection ka bobeli le lithuto tsa rona tsa microdialysis.,

Joalokaha ho bontšitsoe ho Setšoantšo sa 3Maiketsetso a DA ho tloha mahareng a bokhachane ho ea ho NAc a ka nka bohato ba ho khothaletsa mokhoa oa ho qoba le ho thibela phepelo, ka hona, a khothaletsa ho pheta-pheta boitšoaro. Ho natefeloa ho bonoa ka li-receptor tsa D1 ho li-neurons tsa "GABA-dynorphin" approach "le thibelo ka mefuta ea D2 ho li-neurons tsa" Gaba-enkephalin " Ka sebele, ho susumetsoa ke D2 ea lehae ho ka hlahisa matšoao a ho khopisa, joalo ka ho tsikinyeha le ho hohotsoa ke chin. DA e sebetsang ka li-receptor tsa D2 e fokotsa karabelo ea GABA striatal-pallidum neuron ho arabela glutamate le ho khothaletsa khatello ea maikutlo ea nako e telele ea phetisetso ea glutamatergic. Li-receptors tsa D1 li tlalehoa li khothaletsa likarabo ho ts'ebetso e matla ea "gluta-mate" e kopantsoeng le ho tšoarella ha nako e telele, bonyane li-neurons tsa GABA tse projeke ho nigra., Li-receptor tsa D1 mokhatlong oa mahlo o amanang le moputso oa caudate, mme hape, ts'ebetso ea D2-receptor e ne e le se fapaneng. Sena se fana ka tšehetso bakeng sa schema e bonts'itsoeng Setšoantšo sa 3 ho isa bohōleng boo khetla ea accumbens e hlophisitsoeng hammoho le mela e ts'oanang le ea dorsal striatum. Ho na le maikutlo a fapaneng ka har'a lingoliloeng tse hlalosang litsela tse tsoang ho li-accumbens ho ea pallidum, nigra le hypothalamus. E mong le e mong a ka ba le mesebetsi e fapaneng mabapi le ho fumana le ho fana ka likarabo tse nang le maemo le ts'ebetso ea ts'ebeliso ea matla.- Ka har'a li-accumbens, khetla le konokono li tlameha ho khetholloa, ho latela mesebetsi ea tsona le tatellano ea liketso tsa bona.- Ntle le moo, litekanyo tse tlase tsa "vivo voltammetry" li bonts'a ho lokolloa ha DA ka har'a "li-microenvironments" tsa li-accumbens ho ka fapana ka litlatsetso tse ikhethileng tsa kenyelletso ea DA.

Tšoantšiso 3 

Setšoantšo se betliloeng se bonts'ang litšusumetso tsa DA le ACh tse hanyetsanang liphumatsong tse peli tsa GABA tse amanang le tšebeliso ea boitšoaro le mokhoa oa ho qoba mekhoa eo. Lehlakore le letšehali la setšoantšo se bontša lintho tse bokelloang ke linate. Hlokomela hore tlhahiso ea DA ho ...

DA e phahama ho arabela lithethefatsi tsa tlhekefetso e baka liphetoho tse tlase, joalo ka ho bokella ha Delta FosB, ho ka fetolang tlhahiso ea liphatsa tsa lefutso bakeng sa li-receptors le likarolo tse ling tsa cellular joalo ka mokhoa oa puseletso; hona ho ka khothaletsa ho khutlisetsoa hoa lithethefatsi nakong ea ts'ebeliso. Re fana ka maikutlo a hore haeba moferefere ona oa liphetoho tse makatsang o ka ba teng ka lebaka la lithethefatsi tsa tlhekefetso, o ka boela oa hlaha ha lits'oants'o tse ngata tsa DA li bakoa ke ho itlopa joala., Hypothesis ena e tšehetsoa ke bopaki ba morao-rao bo bonts'ang hore li-femme tsa tlhaho, joalo ka ho itlama le boitšoaro ba thobalano, phetoho e hlahisitsoeng ke Delta FosB ho NAc.

Li-interneurons tsa Acetylcholine li ka sebetsa e le mohanyetsi mohato oa ho emisa boitšoaro ka ho etsa se fapaneng le DA maemong a mang a bokelloang joalo ka ha ho laetsoe ho Setšoantšo sa 3. ACh theoretically e thibela mokhoa oa ho thabela takatso hape e tsosa tseleng ea ho qoba ho qoba; sena se ka bakoa ke litlamorao tsa synaptic ho muscarinic M2 le M1 receptors, ka ho latellana (Feie. 3). Boithuto bo bongata ho rat bo tšehetsa pono e bokellang boitšoaro ba likokoana-hloko tsa ACh bo thibelang boitšoaro, ho kenyelletsa le thibelo ea boitšoaro ba ho fepa le ho ja koae.,,, Setsebi sa kelello sa "muscarinic" se sebelisoang sebakeng sa heno ka har'a li-alexander se ka baka khatello ea maikutlo litekong tsa ho sesa le mohanyetsi ea itseng oa M1 a theola khatello ea maikutlo. Dynorphin le li-transmitter tse ling le tsona li kena taolong ea sistimi ena ka khatello ea maikutlo e le e 'ngoe ea sephetho. Ho hlohlotsa tatso e nang le maemo ho hlahisa ACh le neostigmine, e sebelisetsoang ho phahamisa maemo a ACh a lehae, e lekane ho kenyelletsa tatso e latsoang e neng e entsoe ka pente ea cholinergic pele. Sena se fana ka maikutlo a hore ACh e feteletseng e ka baka boemo bo feto-fetohang bo hlahang e le mokhoa o khelohileng oa tatso. Lintho tse ka etsahalang tsa litlhare tse ling tsa muscarinic le nicotinic ka har'a lierekisi ha li tšoane le mohlala oa rona,, 'me ho buisanoa ka libaka tse ling ka lebaka la monyetla oa hore lingaka tse ling tsa "muscarinic agonists" li lokolle DA mme bahanyetsi ba bang ba marang-rang ba ka sebetsa ka li-receptors tsa M2 ho lokolla ACh., Li-interneurons tsa ACh li kanna tsa thibeloa ke DA ka li-receptors tsa D2, joalo ka ha li hlahlojoa ke Surmeier et al. Tlhahiso ena e lumellana le Setšoantšo sa 3, e bonts'ang hore ho lokolloa ha ACh ho tla fokotsa ts'ebetso ho "tsela ea ho qoba" le ho khothaletsa "mokhoa."

Ha re khothalelitse hore maqhubu a DA a bakoang ke ho itlopa lijo tse tsoekere a ka sebetsa ka mekhoa e tsebahalang ho khothaletsa bokhoba, ho bohlokoa ho hlokomela hore ho fepa ka sham, ho ka fokotsang matšoao a ACh satiety, e tla etsa hore karabelo ea kakaretso ea likaroloana tsa lipotso tse ngata e lekana le karabelo ea DA eo motho a e bonang ka litlhare tse ling tsa tlhekefetso tse kang opiates le joala. Hoa leka ho nahana hore sena se fetolela ho lefu la ho itlhatsoa ha motho joalo ka ha le bonoa ho bulimia. Ho itlopa joala le ho itlhatsoa, ​​ho latela liteko tsa litekete, ho ka hlahisa tokollo ea DA e sa thibeloang ke ACh ho li-accumbens.

Litholoana tsa GABA tse bokelletsoeng, tlasa litšusumetso tse hanyetsanang tsa DA le ACh, li nka karolo taolong ea tokollo ea lateral hypothalamic glutamate le GABA. Sehlopha sa Rada se na le tlhaiso-leseling e ncha e bonts'ang hore li-accumbens tsa GABA tse hlahisang lisele li na le li-muscarinic receptors, le hore muscarinic agonist e kenngoeng NAc e baka liphetoho tse kholo tokollong ea glutamate le GABA ho lateral hypothalamus (Rada et al, e sa phatlalatsoang). Sena se tsamaellana le microdialysis le bopaki ba ente ea lehae hore lateral hypothalamic glutamate e kenya letsoho ho qala lijo le GABA ho e emisa.,, Kahoo, mohlala ona o tšehetsoa ke bopaki bo bontšang hore litholoana tse bokellang li nka karolo ho laoleng tsamaiso ea phepelo ea hypothalamic le satiety. Ho li-accumbens, DA le ACh li ka qala le ho emisa tšusumetso ea ho ja ka ho laola mesebetsi ena ka ho lokolloa ha glutamate le GABA ho hypothalamus. Ho hlakile hore sena ke pono e fetelletseng, empa ke mohopolo oa hore data ea rona hona joale e ts'ehetsa mme ka hona e ka ba karolo ea setšoantšo se seholo se tla hlaha hamorao.

CONCLUSIONS

Sengoloa sena se akaretsa lintlha tse fanang ka maikutlo a hore, ho ja lijo tse tsoekere tse ngata khafetsa ho ka lebisa phetohong ea kelello le boits'oaro bo ts'oanang hantle le litlamorao tsa lithethefatsi tsa tlhekefetso. Kahoo, tsoekere e ka lemalla tlasa maemo a ikhethang. Ka lehlakoreng le leng, ho itlopa joala ka mafura, kapa esita le mafura a monate, ho hlahisitse litlamorao tse mpe ho isa boipolelong, ho fana ka maikutlo a hore litsamaiso tse fapaneng tsa neural lia ameha. Lijo tse nang le mafura a mangata, haeba likhoto li itlopa lijo letsatsi le leng le le leng, li ka lebisa ho boima bo eketsehileng ba 'mele. Likhoto tse tloaeloang ke botena ho lijo tse nang le mafura a mangata li bontša litekanyetso tse tlase tsa DA ho NAc, joalo ka litoeba tse tlase, li fana ka maikutlo a hore ka bobeli ba ka nona ka mokhoa o nepahetseng ka mokhoa o khutlisetsang maemo a DA. Maqhubu a bakoang ke ho kula le ho ts'oaroa ke DA a ka ba le boikarabello ba ho feto-fetoha ha maikutlo a neural joalo ka maikutlo a locomotor le tlhotlheletso ea takatso ea lijo. Li-opioids ke karolo e 'ngoe ea bohlokoa ea setšoantšo, empa sistimi e tobileng ha e tsejoe, hobane li-opioids li ka baka phepo libakeng tse ngata tsa boko. Ho bonahala eka opioids e kanna ea ikarabella bakeng sa matšoao a ho ntša le ho kenya ts'ebetsong ts'oaetso ea cue-ikiwa hape. ACh ho NAc ke e 'ngoe ea matla a ho loants'oa ketsong ena. Ho itlopa joala ka tsoekere ho bonahala eka ho chechisa morao ho lokolloe ha ACh, mme ho fepa ka sham ho e fihlela haholo. Sena sohle se tsamaisana le mohlala oa moo DA e hlohlelletsang mokhoa le ho thibela ts'ebetso ea thibelo ho NAc. ACh e etsa se fapaneng, ntle leha e ka patoa ke lithethefatsi tsa tlhekefetso, ho itlopa joala kapa ho itlhoekisa.

lumela hore baa fokola

E tšehelitsoe ke lithuso tsa USPHS DA10608, MH65024, le AA12882 (ho ea BGH) le botsoalle DK-079793 (ho ea ho NMA).

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