Liphello tsa mefuta e meng ea phekolo ea mafu a likobo libakeng tsa boko tse amanang le moputso le takatso ho banna (2013)

Am J Lijo tsa Meriana. Sep 2013; 98 (3): 641-647.

E hatisitsoe Inthaneteng Jun 26, 2013. doi:  10.3945 / ajcn.113.064113

PMCID: PMC3743729

Sehlooho sena se bile teng e boletsoeng ke lihlooho tse ling ho PMC.

Eya ho:

inahaneloang

Background: Likarolo tse nepahetseng tsa lijo li susumetsa boitšoaro ba ho ja, empa mekhoa ea physiologia ea liphello tsena tse ikemetseng e lula e nahanisisa.

Morero: Re ile ra hlahlobisisa liphello tsa letšoao la glycemic (GI) ho mosebetsi oa bokobo nakong ea morao-rao ka morao ka mor'a nako e tloaelehileng ea nakoana.

Tlhahiso: Ka tšebeliso ea moqapi oa crossover o sa hlophisitsoeng, o foufalitsoeng, banna ba 12 kapa ba boima haholo ba lilemo li 18-35 ba ne ba ja lijo tse phahameng le tse tlase tsa GI tse laoloang bakeng sa lik'halori, li-macronutrients le palatability ka linako tse ling tsa 2. Sephetho se ka sehloohong e ne e le ho phalla ha mali ho feta tekanyo ea ho phomola ha boko, e ileng ea hlahlojoa ka ho sebelisa litšoantšo tse sebetsang tse hlahisang matla a mahlaseli a motlakase 4 h ka mor'a lijo tsa tlhahlobo. Re ne re nahana hore mosebetsi oa boko o tla ba moholo ka mor'a lijo tse phahameng tsa GI libakeng tse hlalositsoeng tse amanang le boitšoaro ba ho ja, moputso le takatso.

Results: Phase ea mali e nang le mafura a venous (2-h sebakeng se ka tlas'a lekhalo) e ne e le mokhutšoanyane oa 2.4 ka morao ho feta ho feta GI lijo (P = 0.0001). Kolose ea plasma e ne e le tlase (e bolela ± SE: 4.7 ± 0.14 ha e bapisoa le 5.3 ± 0.16 mmol / L; P = 0.005) mme tlaleho ea tlala e kholoanyane (P = 0.04) 4 h ka mor'a boemo bo phahameng ho feta lijo tse tlaase-GI. Nakong ena, lijo tse phahameng tsa GI li ile tsa etsa hore mosebetsi o moholo oa boko bo behiloe nucleus accumbens e nepahetseng (sebaka se khethiloeng; P = 0.0006 le phetoho bakeng sa papiso e fapaneng) e phatlalatsoang likarolong tse ling tsa striatum e nepahetseng le sebakeng se hlollang.

Qeto: Ha ho bapisoa le lijo tse nyenyane tsa GI tsa isocaloric, lijo tse phahameng tsa GI li ile tsa fokotsa tsoekere ea mali ea mali, ho ba le tlala e eketsehileng, le libaka tsa boko bo tsosolositsoeng tse khethiloeng tse amanang le moputso le takatso ea nako ea morao-rao, e leng nako e nang le bohlokoa bo ikhethang ho ho ja boitšoaro bo latelang lijo. Teko ena e ngolisitsoe ho khalenabella.gov joaloka NCT01064778.

SELELEKELA

Ts'ebetso ea maolimbic dopaminergic ea boko, e fetohang nucleus accumbens (karolo ea striatum), e phetha karolo ea bohlokoa ho moputso le takatso, 'me tsamaiso ena e bonahala eka e fana ka likarabo tsa lijo tsa hedonic (1-3). Liphuputsong tsa rodent, li-concentrel tsa extraoplular tsa dopamine le metabolites ea eona nucleus accumbens li eketsehile haholo ka mor'a ho ja lijo tse monate haholo ho feta mefuta e tloaelehileng ea ho ja mefuta e meng ea lijo (4). Ho feta moo, microinjections ea opiate ka nucleus accumbens e ntseng e eketseha lijo le ho ba le moputso oa lijo (5). Liphuputso tsa meriana ea sepetlele tse sebelisitseng ho sebetsa ka boko boko bo sebetsang li tlalehile ts'ebetso e kholo ho nucleus accumbens kapa libakeng tse ling tsa striatum ka boima ho feta batho ba itšetlehileng ka mor'a hore ba shebe kapa ba je lijo tse monate tse phahameng,6-11). Ka thahasello e khethehileng, ho hlasela Dopamine D2 ho fumaneha ha likhahla ho ne ho le tlaase haholo ho batho ba mahlomoleng ho fapana le ho laola lintho tse sa tšoaneng (11), e leng se ileng sa hlahisa monyetla oa hore ho ja haholo ho ka lefella mosebetsi o tlaase oa dopaminergic. Leha ho le joalo, litšoantšiso tsena tse fapaneng pakeng tsa lihlopha tsa batho ba mahlahahlaha le ba mahlahahlaha ba ke keng ba hlahloba tataiso ea tlhaho.

Litlhaloso tsa physiologic mabapi le letšoao la glycemic (GI)5 fana ka mokhoa oa ho utloisisa hore na lijo tse itseng tse ling, ntle le ho fokotsa, li ka 'na tsa etsa hore ho lakatse lijo le ho ja lijo tse ngata. GI e hlalosa lijo tse nang le lik'habohaedroite tse amanang le tsoekere ea mali sebakeng sa postpandial (12, 13). Joalokaha ho hlalositsoe pele ho bacha ba lilemong tsa bocha (13, 14), ho sebelisoa ha phahameng-ho bapisoa le lijo tse tlase tsa GI ho entse hore ho be le tšollo ea mali e phahameng le insulin nakong ea pele (0-2 h), e ileng ea lateloa ke tšelo ea mali e tlaase nakong ea morao-rao (3-5 h ). Ho fokotseha ha tšelo ea mali, e atisang ho oela ka tlase ho itima lijo ka 4 h ka mor'a lijo tse phahameng tsa GI, ho ka lebisa ho lapeng ka ho feteletseng, ho ja lijo tse ngata, le ho khetha lijo tse potlakileng ho khutlisa tsoekere ea mali ho tloaelehileng (e leng, e phahameng GI) (15-17), li-propagating circles of eating. Ha e le hantle, ho ithuta batho ba baholo ba mahlahahlaha le ba mahlahahlaha, ho bolela hore ho fokotseha ho bakoang ke insulin ho senyeha ha mali ho tloha 4.9 ho ea ho 3.7 mmol / L ho ekelitse ts'ebetso ea lijo-ts'ebetso ea striatum le takatso ea lijo tse phahameng tsa khalori (18). Ho hlahloba mekhoa ena, re bapisoa le liphello tsa lijo tse phahameng tse fokolang le tse fokolang tsa GI tse laoloang bakeng sa lik'hilojule, lihlooho tsa macronutrient, mehloli ea lisebelisoa, le melaetsa nakong ea nako ea morao-rao ka nako e sebelisoang ke boko bo potolohileng bo nang le tšusumetso ea lijo le matla a tekanyo.

LIHLOOHO LE LITLHAHISO

Re ile ra etsa lithuto tsa crossover tse sa hlokomeleheng, tse foufalitsoeng, tse nang le boima bo botle ba 'mele le tse fokolang haholo' me re bapisa liphello tsa lijo tse phahameng le tse tlase tsa tlhahlobo ea GI ho 2 d e arohaneng le 2-8 wk. Sephetho se ka sehloohong e ne e le ho phalla ha mali ho feta tekanyo ea ho phomola ha boko, e neng e khethiloe ka ho sebelisa li-labeling (ASL) fMRI 4 h ka mor'a lijo tsa tlhahlobo. Re ne re nahana hore lijo tse phahameng tsa GI li tla eketsa ts'ebetsong ea striatum, hypothalamus, amygdala, hippocampus, cingulate, orbitofrontal cortex, le li-cortex tsa majoe, tse leng libaka tsa bokooa tse amanang le mokhoa oa ho ja, moputso le ho lemala (6-11). Likarolo tsa bobeli tsa bofelo li ne li kenyelletsa tsoekere ea mali, serum insulin, mme e tlaleha tlala ho pholletsa le nako ea 5-h. Ho nolofala ha lijo tsa tlhahlobo ho ile ha hlahlojoa hape ka ho sebelisa 10-cm e bonahalang ea analog scale (VAS). Litlhare tsa statistical li ne li akarelletsa ho ikemela ha libaka tsa boko ba thahasello le khalemelo bakeng sa litšoantšiso tse ngata. Protocol e ne e khannoa le ho amoheloa ka molao ho tloha Beth Israel Deaconess Medical Center (Boston, MA). Nyeoe e ngolisitsoe ho clinicaltrials.gov e le NCT01064778, mme barupeluoa ba fana ka tumello e ngolisitsoeng e ngolisitsoeng. Lintlha li ile tsa bokelloa pakeng tsa 24 April 2010 le 25 February 2011.

barupeluoa ba

Barupeluoa ba ile ba ngolisoa ka likhoka le li-posters tse neng li abeloa libakeng tsa motse oa Boston le li-listing tsa Inthaneteng. Litekanyetso tsa ho kenyeletsa e ne e le thobalano ea banna, lilemo tsa 18 le 35 y, le BMI (ka kg / m2) ≥25. Basali ha baa ka ba kenngoa thutong ena ea pele ho qoba ho ferekanya ho ka 'nang ha hlaha ho tloha nakong ea ho ea khoeling (19). Mekhoa ea ho khetholla e ne e le bothata bofe kapa bofe bo boholo ba bongaka, ts'ebeliso ea meriana e amileng takatso ea lijo kapa boima ba 'mele, ho tsuba kapa ts'ebeliso ea lithethefatsi, boithabiso bo phahameng, ho nka karolo hajoale lenaneong la ho theola boima ba' mele kapa phetoho ea boima ba 'mele> 5% ho tse fetileng 6 mo, ho kula kapa ho se mamellane ha lijo tsa liteko, le ntho efe kapa efe e hananang le ts'ebetso ea MRI [mohlala, li-implants tsa tšepe tse hanetsoeng, boima> 300 lb (136 kg)]. Tšoaneleho e ile ea hlahlojoa ka ho lekola mohala ho latela seboka sa tlhahlobo ea motho ka mong. Kopanong ea tlhahlobo, re fumane litekanyetso tsa anthropometric mme ra etsa tlhahlobo ea mamello ea tsoekere ea molomo. Ntle le moo, barupeluoa ba ile ba etsa sampole lijo tsa liteko mme ba etsa tatellano ea MRI ho netefatsa bokhoni ba ho mamella ts'ebetso.

Barupeluoa ba ngolisitseng ba kentsoe ka tatellano lethathamong la likabelo tse sa reroang (tse lokiselitsoeng ke Setsi sa Lipatlisiso sa Kliniki sepetleleng sa bana sa Boston) bakeng sa taelo ea lijo tsa liteko ka ho sebelisa li-block tse lumelloang ka linako tse ling tsa 4. Lijo tsa liteko tsa metsi li ile tsa fuoa bankakarolo ke basebetsi ba ithutoang ka linoelo tsa pampiri . Lijo tse peli tsa liteko li ne li na le ponahalo, monko le tatso e tšoanang. Barupeluoa bohle le basebetsi ba etsang lipatlisiso ba kentseng pokello ea lintlha ba ile ba koaheloa ka tatellano ea ho kenella. Barupeluoa ba amohetse $ 250 bakeng sa ho phethela protocol.

Lijo tsa teko

Lijo tsa teko li fetotsoe ho tloha Botero et al (20) ho finyella monate o tšoanang le o fokolang litekong tsa ho latsoa tse amanang le basebeletsi ba thuto. Joalokaha ho bontšitsoe ho Lethathamo 1, lijo tse peli tsa tlhahlobo li ne li entsoe ka mefuta e tšoanang le 'me li ne li e-na le phaello e tšoanang ea macronutrient (ProNutra Software, version 3.3.0.10; Viocare Technologies Inc). GI e boletsoeng esale pele ea lijo tse phahameng le tse tlase tsa tlhahlobo ea GI e ne e le 84% le 37%, ka ho latellana, ka ho sebelisa tsoekere e le tekanyo ea ho bua. K'halori ea lijo tsa teko e ne e ikemiselitse ho fana ka 25% ea litlhoko tsa letsatsi le letsatsi ka matla a tekanyo ea lits'enyehelo tsa matla a phomolo (21) le mosebetsi oa 1.2.

TABLE 1 

Kemiso ea lijo1

Litsela

Nakong ea lenane la ho hlahloba, bophahamo le boima ba 'mele li ne li lekanngoa, lintlha tsa motheo tsa motheo (ho akarelletsa le boipiletso ba morabe le morabe) li ile tsa bokelloa,' me ho fumanoa hormone ea serum thyroid-stimulating (ho shebella hypothyroidism). Barupeluoa ba ile ba fuoa teko ea ho mamella ho mamella ha 75-g ka molomo oa lipalesa (seno se bitsoang 10-O-75; Azer Scientific) le sampling ea glucose ea plasma le serum insulin ho 0, 30, 60, 90 le 120 min.

Liteko tsa teko li arotsoe ke 2-8 wk. Barupeluoa ba ile ba laeloa hore ba qobe liphetoho mekhoeng ea tloaelo ea ho ja le ho ikoetlisa bakeng sa 2 d pele ho thuto ka 'ngoe le ho boloka boima ba' mele ka har'a 2.5% ea motheo ho pholletsa le thuto. Barupeluoa ba fihletse lihlopha tse peli tsa tlhahlobo pakeng tsa 0800 le 0930 ha ba itima lijo ≥12 h le ho itšila joala ho tloha mantsiboeeng a fetileng. Qalong ea thuto ka 'ngoe, bophelo ba nako bo ne bo hlahlojoa, nako ea ho potlaka e tiisitsoe,' me boima le khatello ea mali li ne li lekantsoe. Ho na le catheter e entsoeng ka 20-gauge e sebelisoang bakeng sa sampling ea mali. Ka mor'a nako ea ho lumellana le metsotso ea 30, lijo tsa tlhahlobo tse entsoeng ka tlhaho li ne li jele ka ho feletseng ka har'a 5 min. Litlhapi tsa mali le tlala li fumanoa pele ho nako ea 30 min ka mor'a tlhahlobo ea tlhahlobo nakong ea khetho ea 5-h. Re ne re sa khone ho sebelisa sesebelisoa sa ho futhumatsa matsoho ho kenya mali a majoe haufi le mochine oa fMRI, 'me khatello e amehang ka makhetlo a mabeli bakeng sa mali a capillary e ka be e ferekantse sephetho sa thuto ea mantlha. Ho sebelisoa ha mali a mafura ho ka be ho bakile phoso ka tekanyo ea likarolo tsa mali tse tšoaetsanoang ka mali holimo le ka tlase ho lijo tsa ho itima lijo, haholo-holo bakeng sa lijo tse phahameng tsa GI, tse nang le meeli ea thuto (22). Bothata bo ile ba hlahlojoa kamora ho phethoa lijo tsa tlhahlobo, 'me ho ne ho e-na le lisele tsa phetoho ka mor'a 4 h.

Mehato

Boima ba 'mele bo ne bo lekantsoe seaparo sa sepetlele le liaparo tsa ka tlas'a masela tse nang le lisebelisoa tsa elektronike (Scaletronix). Boima ba tsona bo ne bo lekanngoa le stadiometer e lekaneng (Holtman Ltd). BMI e ne e baloa ka ho arola boima ba lik'hilograma ka kakaretso ea bophahamo ka limithara. Khatello ea mali e ile ea fumanoa ka mokhoa o ikemiselitseng (IntelliVue monitor; Phillips Healthcare) le mohoeletsi a lutse ka khutso bakeng sa minara ea 5. Glucose ea plasma le hormone ea qoqotho e tsosang likokoana-hloko e ne e lekanngoa le Mekhoa e ntlafalitsoeng ea Clinical Laboratory-mekhoa e amohelehang (Labcorp). Serum e ne e lokiselitsoe ka centrifugation mme e bolokiloe ho -80 ° C bakeng sa tekanyo ea insulin thupong e le 'ngoe qetellong ea thuto (Harvard Catalyst Central Laboratory).

Bothata bo ile ba hlahlojoa ka potso e reng, "Ke lijo tse monate hakae?" Barupeluoa ba ile ba laeloa hore ba etse letšoao la mahlakoreng a VAS ea 10-cm ka li-ankora tsa mantsoe tse neng li le "ho se monate" (0 cm) ho "monate haholo" ( Cm 10). Tlala e ile ea hlahlojoa ka tsela e tšoanang, ka potso ea "U lapile joang hona joale?" Le likekere tsa mantsoe tse neng li le "ho se lapa ho hang" ho "lapile haholo" (14).

Ho ne ho etsoa ka mahlaseli ho tloha 4 h kamora 'lijo tsa tlhahlobo, ha mali a tsoang ka mali a tsoa ka mor'a lijo tse phahameng tsa GI (14), ka ho sebelisa mochine oa 'mele oa GE 3Tesla (GE Healthcare). Phallo ea mali ea masapo e ne e khethoa ka ho sebelisa ASL, e leng mokhoa oa MRI o thehiloeng ka ntle ho matla ho sebelisa metsi a tšoaetsanoang a mali bakeng sa ho sebelisoa e le setsebi se sa sebetseng. Ho ile ha fumanoa scan ea 3-plane localizer, e lateloa ke dataset e nang le boima ba T1 bakeng sa modified Driven Equilibrium Fourier Transform) (23), ka nako ea ho pheta-pheta ea 7.9 ms, nako ea ho khutlela ha 3.2 ms, sefofane sa 32-kHz sekhahla sa maiketsetso, sebopeho sa 24 × 19, sekhahla sa 1-mm ka sefofaneng, le likarolo tsa 1.6-mm. Nako ea ho lokisetsa e ne e le 1100 ms ka ho pheta ho pheta-pheta qalong ea nako ea ho itokisa le ho hlasela ho ts'oaetso ha adiabatic 500 ms pele ho litšoantšo. Ka mor'a ho latellana, ho hlahlojoa ha ASL ho fumanoe ka mekhoa e hlalositsoeng pele (24). Ho latellana ho sebelisitsoe melaetsa ea pseudocontinuous le khatello ea morao-rao ho fokotsa lik'hamphani tse tsamaeang, setšoantšo sa 3-dimensional multist of imaging spiral, setšoantšo sa 3.8 mm ka sefofaneng, le likarolo tse mashome a mane a metso e mene tsa 4-mm ka molumo o le mong. Letšoao le ts'oanang le lisebelisoa bakeng sa 1.5 s le lebelo la postlabeling la 1.5 pele setšoantšo se fumaneha (25) e ile ea etsoa ka cm 1 ka tlaase ho setsi sa cerebellum (4 methati ea label le taolo le litšoantšo tse sa tsitsitseng tsa 2 bakeng sa ts'oaetso ea mali ea phekolo ea mali). Phallo ea mali ea masapo e ne e lekanngoa le software e tloaelehileng joalokaha e tlalehiloe pele (24-26).

Lipatlisiso tsa sethathamo

Thuto e ne e etselitsoe ho fana ka matla a 80% ka ho sebelisa tekanyo ea liphoso tsa mofuta oa 5% ho lemoha phapang pakeng tsa mali ea 11.8%, ho nka sampuli ea boholo ba barupeluoa ba 12, ho senya SD ea 11% bakeng sa tekanyo e le 'ngoe, le ka hare ho lumellana ha 0.6. Sebopeho se fumanoeng sa barupeluoa ba 11 ba nang le boitsebiso bo sebetsang bo fane ka matla a 80% ho bona phapang ea 12.4%, le likhopolo tse ling tsohle tse setseng.

Dintlha tsa dintlha tsa diphetho tsa diurosetiki li ne li etsoa ka tikoloho ea tlhahlobo ea setšoantšo sa Statistical Parametric Mapping (SPM5; Lefapha la Wellcome la Neoglogy e nahanang). Litšoantšo tsa matšoao a mali li ne li fetisetsoa setšoantšong sa pele ebe li fetoloa sebakeng se tloaelehileng sa anatomic (Montreal Neurologic Institute / International Consortium bakeng sa Mapolesa a Bokooa) (27) ka ho sebelisa mefuta e fapaneng ea ngoliso e tsoang ho SPM5 Normalization algorithm. Litšoantšo li khabisitsoe ka bophara ba 8-mm ka halofo ea kernel ho lokisetsa tlhahlobo ea lintlha.

Re ile ra hlahloba sebaka sa stereotactic ka ho sebelisa li-template ka har'a lebokose la lithulusi tsa WFU Pickatlas (28). Har'a libaka tse ling tsa 334 tse sa amaneng le li-anatomic ho pholletsa le boko, libaka tse thahasellisang tse nang le thahasello tse kenyeletsang libaka tse fapaneng tsa 25 (sheba Tlhaloso ea Supplemental 1 tlasa "Tlhaloso ea Litlatsetso" tsekong ea inthaneteng). Ho leka tlhahlobo ea rona ea mantlha, re ile ra bapisa phapang pakeng tsa phekolo ea mali ea sebaka se phahameng (lijo tse phahameng tsa GI tse fokolang lijo tse fokolang-GI) ka ho sebelisa paired, 2-tailed t liteko tse fetotsoeng bakeng sa phello ea taelo le ka khalemelo ea Bonferroni bakeng sa papiso e mengata (e tala P palo e atolositsoeng ke 25). Ho hlalosa ho aroloa ha sebaka sa ho fapana ha mali ho tsoa ha mali, re ile ra etsa tlhahlobo ea voxel-voxel ka ho sebelisa mekhoa ea ho etsa sebopeho sa moelelo o tloaelehileng (29) le palo ea sekhetho sa P ≤ 0.002.

Li-AUC tse hloekisang bakeng sa tsoekere ea plasma (0-2 h), insumine ea serum (0-2 h), le tlala (0-5 h) e ne e baloa ka ho sebelisa mokhoa oa trapezoidal. Libaka tsena le litekanyetso tsa liphello tsena ho 4 h (ntlha ea nako e khethiloeng ea thahasello e ka sehloohong) li ile tsa hlahlojoa bakeng sa phello ea tlhahlobo ea tlhahlobo ka ho sebelisa li-2 tse nang le mahlakoreng, li kopane t tlhahlobo le SAS software (tlhahiso ea 9.2; SAS Institute Inc). Liphetoho bakeng sa phello ea taelo ha ea ka ea ama litholoana tsena. Ho hlahloba kamano pakeng tsa mefuta-futa ea physiologia le ho sebetsa ha boko, ho hlahlojoa ha mefuta e tloaelehileng ho ile ha etsoa ka ho phalla ha mali ka nucleus accumbens e nepahetseng e le mofuta o tsitsitseng le palo ea barupeluoa le mefuta e fapaneng ea mefuta-futa e le mefuta e ikemetseng. Lintlha li hlahisoa ka mekhoa, 'me, moo ho bontšitsoeng, SE.

LIPOTSO

Barupeluoa ba ithuta

Ho batho ba 89 ba hlahlobisitsoeng, re ngolisitse banna ba 13, ka ho tlohela 1 pele ho tsamaiso ea lijo tsa pele tsa tlhahlobo (Setšoantšo sa 1). Batsoaruoa ba 12 ba setseng ba ne ba kenyelletsa 2 Hispanics, bats'oena ba 3 bao e seng ba Maaspanishe, le bahlabani ba se nang litsebo tsa 7. Nako e boima e ne e le 29.1 y (lehlakoreng: 20-35 y), BMI e ne e le 32.9 (lebala: 26-41), ho itima lijo ka har'a mahlaseli a 'mele oa mali e ne e le 4.9 mmol / L (lebone: 3.6-6.2 mmol / L), le ho itima lijo ka insulin e ne e le 10.3 μU / mL (moeli: 0.8-25.5 μU / mL). Ho bonts'a data bakeng sa moemeli e mong ho ne ho sa phethoa ka lebaka la phoso ea polokelo ea data; barupeluoa ba bang ba qetile phetolelo eo ka mokhoa o sa tsebeng.

TLHAHLISO 1. 

Setšoantšo sa phallo ea barupeluoa.

Ho arabela ka tsela e ikhethileng le ea lik'hemik'hale linthong tsa tlhahlobo

Ho nolofala ha lijo tse phahameng le tse tlase tsa tlhahlobo ea GI ha lia ka tsa fapana ho latela likarabo tsa 10-cm VAS (5.5 ± 0.67 ha e bapisoa le 5.3 ± 0.65 cm, ka ho latellana; P = 0.7). Tumellanong le GI e boletsoeng esale pele (Lethathamo 1), e kholo ea 2-h AUC bakeng sa tsoekere e ne e le kholo ea 2.4 ka mor'a lijo tsa tlhahlobo tse phahameng tsa GI (2.9 ± 0.36 ha li bapisoa le 1.2 ± 0.27 mmol · h / L, ka ho latellana; P = 0.0001) (Setšoantšo sa 2). 2-h AUC e kholo ea insulin (127.1 ± 18.1 ha e bapisoa le 72.8 ± 9.78 μh h / mL; P = 0.003) le ho feta 5-h AUC ea tlala (0.45 ± 2.75 ha e bapisoa le -XUMUM ± 5.2 cm · h; P = 0.04) e ne e boetse e le khōlō ka mor'a hore lijo tsa tlhahlobo tse fokolang haholo tsa GI, ka ho latellana. Nakong ea 4 h nakong ea postpandial, mohopolo oa mali oa tsoekere o ne o le tlaase (4.7 ± 0.14 ha o bapisoa le 5.3 ± 0.16 mmol / L, P = 0.005), 'me phetoho ea tlala e tsoang molaong oa motheo e ne e le kholo (1.65 ± 0.79 ha e bapisoa le -0.01 cm ± 0.92; P = 0.04) ka mor'a hore lijo tsa tlhahlobo tse fokolang haholo tsa GI, ka ho latellana.

TLHAHLISO 2. 

Ho boleloa hore ± SE e fetoha tsoekere ea mali ea mali (A), serum insulin (B), le tlala (C) kamora lijo tsa tlhahlobo. Phapang pakeng tsa lijo tse phahameng le tse tlaase tsa GI li ne li le bohlokoa ho 4 h (nako ea thahasello) bakeng sa liphello tsohle tsa 3 ka ho sebelisa li-paired t liteko. n = 12. GI, ...

Pono ea boko

Phallo ea mali e ne e le kholo 4 h ka mor'a lijo tse phahameng ho feta tsa GI ka nucleus accumbens e nepahetseng (phapang e bolelang: 4.4 ± 0.56 mL · 100 g-1 · Metsotsoana-1;; mebala: 2.1-7.3 mL · 100 g-1 · Metsotsoana-1;; e leng 8.2% kamano e fapaneng). Phapang ena e ile ea lula e le ea bohlokoa kamora ho khalemeloa ha Bonferroni bakeng sa libaka tsa 25 tse sa tsejoeng tse thahasellisang (P = 0.0006) le ka mor'a ho lokisoa bakeng sa libaka tsohle tsa boko ba 334 tse sa boleleng (P = 0.009). Tlhahlobo e thehiloeng setšoantšong e bontšitse sebaka se le seng nucleus accumbens e nepahetseng Montreal Neurologic Institute / International Consortium bakeng sa liphuputso tsa Mapolanka a Brain 8, 8, -10 (tlhōrō t = 9.34) le boholo bo bong ba libaka tsa 12, 12, 2 (t = 5.16), e jalang libakeng tse ling tsa striatum e nepahetseng (caudate, putamen, le globus pallidus) le sebaka se nang le mahlo (Setšoantšo sa 3). Ha rea ​​ka ra bona phapang pakeng tsa libaka tse ling tse thahasellisang.

TLHAHLISO 3. 

Libaka tse nang le mali a mangata a fapaneng haholo a phallo ea mali (4 h) ka mor'a lijo tsa tlhahlobo (P ≤ 0.002). Palo ea 'mala e emela bohlokoa ba t dipalo-palo bakeng sa papiso pakeng tsa lijo (n = 11) ka ho hlahloba litšoantšo tse tloaelehileng tse hlalositsoeng ho tsona ...

Kamano pakeng tsa mefuta-futa ea mefuta-futa le ho phalla ha mali ka nucleus accumbens e nepahetseng e bontšoa ho Lethathamo 2. Liphetoho tsohle tse amanang le tsoekere ea mali ea mali, serum insulin, le tlala li ne li amana haholo le ho phalla ha mali ka nucleus accumbens e nepahetseng, athe ho nolofala ha lijo ha hoa ka ha e-ba joalo.

TABLE 2 

Kamano pakeng tsa mefuta e fapaneng ea physiologic le ho phalla ha mali ka nucleus e sebetsang hantle1

TŠOHLOA

Ho ja lijo ho laoloa ke hedonic le homeostatic systems (3) tse fetileng li ile tsa thusa ho boloka BMI e boemong bo botle tlas'a maemo a sa tšoaneng a tikoloho. Leha ho le joalo, ha e le hantle ho na le seoa sa botenya haholo, lijo li fetohile haholo, le ho sebelisoa ha lijo tse ntseng li eketseha ka potlako tse tsoang lihlahisoa tsa lijo-thollo. Ka lebaka leo, mocheso oa glycemic (sehlahisoa se ngata sa GI le likhahydrate)30) lijo tsa US li tsohile haholo lilemong tse mashome a mararo tse fetileng, 'me mokhoa ona oa lefatše o ka senya mekhoa e mabeli e laolang ho ja lijo. Ho theoha ha tsoekere ea mali (le mefuta e meng ea lik'hemik'hale) (13, 14) nakong ea phomolo ea morao ka morao ka lijo tse phahameng tsa GI e ne e ke ke ea e-ba pontšo e matla ea tlala ea homeostatic (15) empa hape e eketsa bohlokoa ba hedonic ea lijo ka ho thibela ho hlasela (18). Kopano ena ea liketsahalo tsa physiologic e ka matlafatsa litakatso tsa lijo ka khetho e ikhethang ea lik'habohaedreite tse phahameng tsa GI (16, 17), ka tsela eo, ho jala ho ja lijo tse ngata. Ho phaella moo, ts'ebetsong ea phetoho ea se-striatum e ka 'na ea fokotsa ho fumaneha ha mokhathala oa dopamine' me ea tsoela pele ho eketsa koloi ea ho ja haholo (11).

Thuto ena e na le matla a 'maloa. Ntlha ea pele, re sebelisitse ASL, e leng mokhoa oa litšoantšo oa litšoantšo o fanang ka tekanyo e ngata ea ho phalla ha mali. Mokhoa o tloaelehileng (tšelo ea mali ea mali-e itšetlehile ka fMRI) e hlahloba liphetoho tse matla bokong ba boko, eseng phapang e feletseng, eo ka tloaelo e fokotsang maikutlo ho metsotsoana e seng mekae ka mor'a lefufalo la physiologic. Ka ASL, re ile ra khona ho hlahloba liphello tse sa khaotseng tsa lijo tsa tlhahlobo ntle le tšusumetso e kholo (mohlala, litšoantšo tsa lijo tse phahameng tsa lik'halori). Ea bobeli, re sebelisitse ho kenngoa ha li-crossover ho e-na le ho bapisa likarolo pakeng tsa lihlopha (mohlala, ho khotsofatsa ha ho bapisoa le ho feta), e leng se faneng ka matla a mangata a lipalo le bopaki ba tataiso e fokolang. Ntlha ea boraro, re ne re tsepamisitse tlhokomelo ho lijo tse itseng ka ho laola lik'hilojule, tlhahiso ea macronutrient, mohloli oa mehloli, le foromo ea lijo, ho e-na le ho bapisa lijo tse fapaneng haholo (mohlala, cheesecake ho bapisoa le meroho) (6, 10, 31, 32). Ntlha ea bone, lijo tsa tlhahlobo tsa 2 li ne li etselitsoe li bile li ngotsoe hore li be le palatability e tšoanang, e thusitseng ho fokotsa liphello tsa metabolic ho tloha likarabong tsa hedonic hang-hang. Ea bohlano, re ile ra hlahloba nako ea morao-rao ea postpandial, e leng nako e nang le bohlokoa bo khethehileng tabeng ea ho ja boitšoaro nakong ea lijo tse latelang. Liphuputso tse fetileng li fokolitse nako ea ho shebella ho ≤1 h kamora lijo tse sebelisoang, ha monokotšoai oa litlhapi o phahame le lijo tse phahameng tsa GI li ka bonahala eka li fana ka melemo ho bokong bo sebetsang (33). Ntlha ea botšelela, re ne re sebelisa lijo tse tsoakaneng le mohopolo o moholo oa matla le lijo tse fokolang ka bongata ka har'a mefuta e mengata. Ka hona, liphuputso li na le bohlokoa ho lifofane tsa GI tse phahameng tse sebelisoang United States (mohlala, li-bagel le li-cream tse se nang mafura) (12).

Meeli e mengata ea ho ithuta e ne e akarelletsa ho nyenyane le ho lebisa tlhokomelo e khethehileng ho banna ba feteletseng le ba mafura haholo. Thuto e nyenyane ea thuto e fokotseha haholo mme e eketsa kotsing ea ho fumana ntho e fosahetseng (empa e seng ea bohata). Thuto ea rona, ho sa tsotellehe boholo ba eona, e ne e e-na le matla a maholo a ho leka tlhahlobo ea priori le liphetoho tsa lipapiso tse ngata. Liphuputso tse eketsehileng ka lihlooho tse laolehileng tsa ho laola, basali, le batho ba mafura haholo pele le ho lahleheloa ke boima ba 'mele e tla ba tsebo. Ha rea ​​ka ra hlahloba likarabo tsa hedonic lijong kapa lijo tsa lijo ka ho toba, ka hona, re ke ke ra hlahloba kamano pakeng tsa litekanyetso tsena tse ikhethang le ho sebetsa ha boko. Ho phaella moo, mofuta oa metsi oa lijo tsa tlhahlobo o fokotsa matla a ho fumanoa lijong tse tiileng.

Litaba tse ling tse ngata tse hlalosang li lokela ho hlahlojoa. Ha rea ​​ka ra lebella phello ea GI bokong bo fokolang sebakeng se nepahetseng, le hoja kamorao ho nako e 'nile ea ameha ka mathata a ho itšireletsa ka maikutlo a amanang le moputso oa potoloho. Ha e le hantle, phuputso e neng e bapisa insulin-e nahanang ha e bapisoa le banna ba sa sebetsaneng le insulin e ile ea bontša phapang e fapaneng ea tsamaiso ea insulin ea tsamaiso ea methapo ea methapo ea matla, empa e sa siea, ventral striatum (34). Hape ha rea ​​ka ra bona phapang pakeng tsa libaka tse ling tsa boko bo boletsoeng hantle, ebang ke hobane thuto ea rona e ne e se matla a ho bona liphello tse fokolang kapa hobane liphello tse joalo li sa ka tsa etsahala nakong ea 4-h. Leha ho le joalo, phekolo ea lik'hemik'hale ea nucleus accumbens ka likhoto e ile ea fella ka ho tsosoa ha li-neurons tsa orexigenic le ho thibela li-neurone tsa anorexigen hypothalamus (35), e bontšang tšusumetso ea striatum libakeng tse ling tsa bokooa tse amehang ho fepa.

Ka ntle ho moputso le takatso, mokokotlo oa accumbens o ameha haholo ts'ebetsong e mpe ea lithethefatsi le ho itšetleha ka botlalo (36-38), ho phahamisa potso mabapi le hore na lijo tse ling li ka 'na tsa lemalla. Ha e le hantle, khopolo ea ho lemalla lijo e fumaneha haholo ka libuka tsa lijo le litlaleho tsa mehleng ea khale 'me e ntse e tsoela pele ho etsoa lipatlisiso. Liphuputso tsa morao-rao tse sebelisitseng tloaelo e tloaelehileng ea mali ea oksijene e nang le mali a fMRI li bontšitse ho se sebetse habonolo nucleus accumbens le libaka tse ling tse amanang le bokooa ha li bapisoa le batho ba omeletseng ha ba bontšoa litšoantšo tsa lijo tse monate haholo (6-11) le litabeng tse ileng tsa fumana tse ngata ka ho lemalla lijo (39). Leha ho le joalo, ho ka 'na ha e-ba le maikutlo a hore karabelo ena ea thabo e amanang le lijo ha e fapane ka ho feletseng le thabo ea litšoantšo tsa ho sheba li-golfer tsa ho beha setala kapa ho mamela' mino o motle oa audiophile (40). Ho fapana le lipatlisiso tsa nakong e fetileng, thuto ea rona e sebelisitse lijo tsa tlhahlobo tse tšoanang le mokhoa oa ASL oa ho hlahloba tšebetso ea boko bo sa tsitsitseng ka mor'a 4 h. Leha ho le joalo, ho nepahala ha khopolo ea ho lemalla lijo ho lula ho phehisana khang haholo (41-47). Ho fapana le lithethefatsi tsa tlhekefetso, lijo li hlokahala hore motho a phele, 'me batho ba bang ba ka tloaela ho ja lihlahisoa tse ngata tse phahameng tsa GI (le tse phahameng-lik'halori, tse sebelisoang ka ho fetisisa) tse sa hlahisoeng ke litho tsa' mele kapa tsa maikutlo. Ka hona, ho sebelisoa ha khopolo ea ho lemalla lijo ho hloka hore ho be le lithuto tse eketsehileng tsa tlhahiso-pele le ho hlahloba.

Qetellong, re bontšitse hore ho sebelisoa ha lijo tse phahameng-ho bapisoa le lijo tse tlaase tsa GI ho eketsa mosebetsi likarolong tsa bokooa tse amanang le ho ja lijo, moputso, le takatso ea lijo nakong ea morao-rao, e neng e lumellana le tšelo ea mali e tlaase le ho feta tlala. Liphuputso tsena tsa neurophysiologic, hammoho le lipatlisiso tsa nako e telele tsa boima bo boima ba tlhokomelo (48, 49), e fana ka maikutlo a hore ho fokotsa ho sebelisoa ha li-GI lik'habohaedreite tse phahameng (ka ho khetheha, lihlahisoa tsa lijo-thollo tse entsoeng haholo, li-litapole, le tsoekere e tebileng) li ka ntlafatsa ho ja haholo le ho thusa ho boloka boima bo boima ho batho ba fetang tekanyo le ho feta.

lumela hore baa fokola

Re leboha Dorota Pawlak, Simon Warfield le Phillip Pizzo bakeng sa ho susumetsa lipuisano le likeletso; Joanna Radziejowska bakeng sa thuso ea tlhahiso ea lijo le tlhahiso ea lijo; le Henry Feldman bakeng sa keletso ea lipalo. Ha ho le ea mong oa batho bana ea fumaneng matšeliso bakeng sa menehelo ea bona

Boikarabello ba mongoli bo ne bo le ka tsela e latelang-DCA, CBE, JMG, LMH, BSL, DSL, le ES: li fane ka mohopolo oa thuto le moralo; DCA le BSL: ba fumane boitsebiso le boitsebiso ba lipalo-palo; DCA, JMG, LMH, BSL, le DSL: ho hlahlojoa le ho hlalosoa dintlha; BSL le DSL: li ngotse mongolo o ngotsoeng ka letsoho; DCA, CBE, JMG, LMH, RR, le ES: e hlophisitse ka ho hlaka mongolo o ngotsoeng ka letsoho; RR: fana ka tšehetso ea theknoloji; DCA, BSL, le DSL: ba fumane chelete; DCA le DSL: tlhokomelo e fanoeng; le DSL: e le mofuputsi ea ka sehloohong, o fihletsoeng ka botlalo litabeng tsohle tsa thuto mme o nka boikarabelo ba botšepehi ba data le ho nepahala ha tlhahlobo ea litaba. DCA e ile ea fuoa lichelete ho tsoa ho NIH le GE Healthcare, eo e leng mohoebi oa MRI, bakeng sa ho etsa litšoantšo tsa ts'ebeliso ea litsebo le mekhoa le litšebeletso ka mekhoa ea hae ea morao-rao le ea khale bakeng sa lihlahisoa tse amanang le mekhoa ea ASL e sebelisitsoeng thutong ena. DSL e fumane menehelo ho tsoa ho NIH le metheo ea lipatlisiso tse amanang le botenya, tlhokomelo le tlhokomelo ea mokuli le melemo e tsoang bukeng e mabapi le botenya ba bongoana. BSL, LMH, ES, RR, CBE, le JMG ha lia tlaleha likhohlano tsa thahasello.

Mongolo o botlaaseng ba leqephe

5Lifetoleli tse sebelisitsoeng: ASL, lihlahisoa tsa ho ngola tse ling; GI, glycemic index; VAS, analog scale e bonahalang.

LITLHAHISO

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