Phaello e phahameng ea matla e amana le ho se ts'oanehe ha maikutlo libakeng tsa bokooa, ho ts'oaroa, le ho putsa bokooa ha ho ntse ho lebelloa chelete e amohelehang ea lijo (2013)

Am J Lijoana tsa Mmele. 2013 Jun; 97 (6): 1188-94. Doi: 10.3945 / ajcn.112.055285. Epub 2013 Apr 17.

Burger KS1, Stice E.

inahaneloang

Background: Ho nona ha ho bapisoa le batho ba se nang letheka ho bonts'a tlhokomelo e kholo-, gustatory-, le karabelo tikolohong ea meputso ho lithahasello tsa lijo empa e fokotsisa karabelo ea sebaka sa moputso nakong ea lijo. Leha ho le joalo, tsebong ea rona, patlisiso ha e so lekole hore na mokhoa oa "caloric" o lekantsoeng hantle o kopantsoe hantle le karabelo ea neural e ikemetseng ea lithane tsa adipose e feteletseng.

Morero: Re lekile hypothesis e lekantseng tšebeliso ea matla, e lekanang le litlhoko tsa mantlha le liperesente tsa mafura a mmele, e lumellana hantle le karabelo ea neural ho lijo tse ka lebelloang empa e le hampe ka karabelo ea ho ja lijo ho bacha ba phetseng hantle.

Tlhahiso: Barupeluoa (n = 155; bolele ± lilemo tsa SD: 15.9 ± 1.1 y) e qetile sekhahla sa ts'ebetso ea matla a ho lekola ha u ntse u lebelletse le ho fumana lijo tse monate ha li bapisoa le tharollo e seng kotsi, tlhahlobo ea metsi a nang le tšebeliso ea matla a mangata, le tlhahlobo ea tekanyo ea metabolic le sebopeho sa 'mele.

Results: Matla a amanang le phepelo e tsamaellana hantle le ts'ebetso ea "cortices" ea morao-rao ea pono le ho tsepamisa maikutlo (sefahleho se shebiloeng le ho tsepamisa maikutlo), nakong eo ho lebelloang lijo tse matlafatsang, le ts'ebetso e kholo ea ts'ebetso ha ho lebelletsoe lijo tse fumanehang sebakeng se amehang haholo sa tlhahlobo ea thahasello. . Ho ja matla a matla ho ne ho sa amane haholo le ho arabela ha neural nakong ea lijo tse fumanehang habonolo.

Qeto: Liphetho li bonts'a tšebeliso ea matla e lekantsoeng hantle e lekanang le litlhoko tsa mantlha le lithaelese tsa adipose li lumellana hantle le ts'ebetso libakeng tse tlhokomeliso, tse khahlang le ho putsa ha li lebelletse lijo tse fumanehang habonolo. Leha ho hloka ts'ebeliso e matla ea libaka tsena ho ka eketsa kotsi ea ho ja ho feta tekano, ha ho hlake hore na see ke sesosa sa tlokotsi kapa sephetho sa ho nona ho feta tekano.

SELELEKELA

Liphuputso tse entsoeng ka neuroimaging li fane ka leseli le hlakileng lipakeng tsa karohano ea kutlo ea tlhaho ho ts'usumetso ea lijo e le ts'ebetso ea boemo ba boima. Haholo-holo, batho ba batenya ha ba bapisoa le batho ba se nang letheka ba bontšitse karabelo e kholo libakeng tse amanang le moputso (striatum, pallidum, amygdala, and orbitof Pambal cortex) le libaka tsa tlhokomeliso (li-cortices tsa bonono le tsa ka ntle) ho thabisa litšoantšo tsa lijo (1-5), lijo tse natefiloeng tse ka lebelloang (6, 7), le monko oa lijo (8). Obese ha e bapisoa le batho ba monyetleng e boetse e bonts'itse ts'ebetso e kholo ho karolo ea mantlha ea gustatory cortex (anterior insula le fronterc operculum) le libakeng tsa molomo tsa somatosensory (postcentral gyrus le parietal operculum) nakong ea ho pepesehela litšoantšo tsa lijo (2, 5) le lijo tse natefeloang tse fumanehang (6, 7). Lintlha tsena li tsamaisana le mohlala oa tšenyehelo ea moputso, e fanang ka hore batho ba fumanang moputso o eketsehileng ka lebaka la ho ja lijo ba kotsing ea ho ho ja ho feta tekano (9). Ho latela juxtaposition, monokotšoai o bapisoa le batho ba se nang letheka o bontšitse ho se sebetse haholo libakeng tse amanang le moputso nakong ea lijo tse fumanehang habonolo (7, 10, 11), e lumellanang le khopolo ea ho haelloa ke moputso, e reng batho ka bomong ba ka tšella ho lefella sekoloto sa moputso (12). Lintlha li bontšitse hore liphumano li fapana ho latela hore na tlhahlobo ea karabelo ea lijo e amanang le tšebeliso ea lijo e ea hlahlojoa na e fana ka maikutlo a hore ho bohlokoa ho etsa lipatlisiso mabapi le ho arabela ka liketsahalo tsena ka bobeli.

Boholo ba lipatlisiso tsa morao-rao li bapisitse ka kotlolloho botenya ha bo bapisoa le batho ba se nang 'mele, bo faneng ka tlhaiso-leseling e fokolang mabapi le ts'ebetso ea etiologic e bakang boima ba pele ba boima. Hajoale, ha ho hlake hore na phapang e amanang le botenya ho arabello ea neural ho susumetso ea lijo e tsamaisoa ke ts'ebetso e fetotsoeng ea neuroendocrine e tsoang liphatseng tse ngata tsa lithane tsa adipose (13, 14) ha e bapisoa le tšebeliso ea tloaelo ea ho ja lijo tse nang le "caloric" tse ngata joalo ka ha ho khothalelitsoe mehlaleng ea thuto ea methapo ea kutlo (9, 12, 15, 16).

Ho hlahloba ka kotloloho phello ea tšebeliso e tloaelehileng ea matla (EI)4 mabapi le karabelo ea neural ho khothalletso ea lijo, ntle le litlhoko tsa basal le lithane tsa adipose, re lekotse hore na likhakanyo tsa metsi tsa EI li ngotsoe ka makhetlo a mabeli ha li nahana ka lijo tse matlafatsoang le ho fokotsa karabelo nakong ea lijo le litekanyo tsa metabolism tse setseng (RMR) le liperesente tsa mafura a 'mele ho bacha ba boima ba' mele bo laoloang bakeng sa. Re kholoa hore EI e ka amahanngoa 1) Karabelo e kholo ea moputso (mohlala, striatum), tlhokomeliso (mohlala, litšoantšo tsa ponelo-pele ea methapo), gustatory (mohlala, anterior insula le fronterc operculum), le molomo somatosensory (mohlala, postcentral gyrus le parietal operculum) dikarolo tsa boko mabapi le karabelo lijo tse lebelletsoeng habonolo 2) Karabelo e tlase ea neural ea libaka tsa moputso nakong ea lijo tse fumanehang habonolo.

LIHLOOHO LE LITLHAHISO

Mohlala (n = 155; BOPHELO Banna ba lilemong tsa bocha ba 75 le basali ba lilemong tsa bocha ba 80) e ne e le 10% Hispanic, 1% Asia, 4% African American, 79% e tšoeu, le barupeluoa ba 6% ba Maindia a Amerika le MaAlaska. Batho ba tlalehileng ho itlopa joala kapa boitšoaro bo hlephileng nakong e fetileng ea 3 mo, ts'ebeliso ea litlhare tsa psychotropic kapa lithethefatsi tse seng molaong, ho lemala hloohong ka ho lahleheloa ke kelello, kapa lefu la kelello la Axis I selemong se fetileng (ho kenyeletsoa anorexia nervosa, bulimia nervosa, kapa lefu la ho itlopa joala) ha lia kenyelletsoa. Batsoali le bacha ba fane ka tumello e ngotsoeng e nang le tsebo bakeng sa morero ona. Barupeluoa ba fihlile laboratoring kamora ho itima lijo bosiung bo le bong, ba phethile sebopeho sa 'mele, litekanyo tsa anthropometric, tlhahlobo ea RMR, le tlhahlobo ea pele ea DLW, mme ba khutlisa 2 wk hamorao bakeng sa tlhahlobo ea DLW e latelang. Litekanyetso tsa fMRI li etsahetse nakong ea tekanyetso ea 1 ea litlhahlobo tsa DLW. Boto ea Setsi sa Patlisiso ea Setsi sa Oregon e amohetse mekhoa eohle.

EI

DLW e ne e sebelisoa ho hakanya EI nakong ea 2-wk. DLW e fana ka tekanyo e nepahetseng haholo ea tšebeliso ea 'mele e sa thibeloeng ke litheko tse amanang le lijo tse hopotsoang kapa li-diary tsa lijo (17, 18). DLW e sebelisa marang-rang a isotopic ho lekola tlhahiso e felletseng ea khabone, e ka sebelisetsoang ho hakanya litšenyehelo tse tloaelehileng tsa caloric (19). DLW e ile ea fanoa hang hang ka mor'a hore lithuto li hlahlojoe hampe bakeng sa boimana (haeba ho hlokahala). Lida e ne e le 1.6-2.0 g H218O (Karolo ea athomo ea 10) / kg e hakanyetsoang metsi a 'mele. Mehlala ea urine ea Spot e ile ea bokelloa hang-hang pele DLW e fanoa le 1, 3, le 4-h postdosing. Libeke tse peli hamorao, li-sampole tsa mochine oa 2 tse ling tsa ho ntša metsi li ile tsa bokelloa ka nako e ts'oanang ea matsatsi joaloka li-sampuli tsa 3- le 4-h postdosing. Ha ho na mehlala e neng e le lero la pele la letsatsi. Lits'enyehelo tsa Matla (EE) li ne li baloa ka ho sebelisa equation A6 (19), litekanyo tsa sebaka sa dilution (20), le equation e fetotsoeng ea Weir (21) joalo ka ha ho hlalositsoe pele (22). EI ka letsatsi e ne e baloa ho tloha kakaretso ea EE ho tloha DLW le phetoho e lekantsoeng ea mabenkele a matla a 'mele ho tloha mehatong ea boima ba' mele ea serial e entsoeng ho baseline (T1) le 2-wk kamora ho dosing (T2). Palo ena e arotsoe ke palo ea matsatsi pakeng tsa tlhahlobo ea motheo le 2-wk kamora ho qeta ho bala mohloli oa letsatsi oa li-substrates tsa matla ho tloha ho theola boima ba 'mele kapa ho boloka EI e feteletseng e le phaello ea boima (23). Equation e sebelisitsoeng bakeng sa karolo e 'ngoe le e' ngoe e ne e

Faele e kantle e nang le setšoantšo, papiso, joalo-joalo Lebitso la ntho ke ajcn9761188equ1.jpg

7800 kcal / kg ke khakanyo ea matla a lithane tsa adipose (24). Phetoho ea boima ba 'mele (boima ho T2 - boima ho T1) e boetse e sebelisitsoe tlhahlobisong ea khatello ho lekola bonnete ba nako e tšoanang ea EI ka litlhoko tsa basal e le protocol ea matla a laoloang bakeng sa.

RMR

RMR e ne e lekantsoe ka ho sebelisa calorimetry e sa amaneng le TrueOne 2400 Metabolic Measurement System (ParvoMedics Inc) litekong tsa pele tsa DLW. RMR e na le 60-75% ea EE ea letsatsi le letsatsi mme e amana le ho hlokomela mesebetsi e meholo ea 'mele (25). Bakeng sa tlhahlobo ea RMR, bankakarolo ba fihlile laboratoring kamora ho itima lijo bosiung bo le bong (moeli: 5-15 h) mme ba emisitse ho ikoetlisa bakeng sa 24 h pele ho liteko. Phapang e bile ka lebaka la palo ea lihora tse robetseng bosiung bo fetileng. Barupeluoa ba ile ba phomola ka khutso ka phapusing e laoloang ke mocheso bakeng sa metsotso e 20, 'me polasetiki e bonaletsang e neng e hokahane le sesebelisoa e ile ea beoa holima hlooho ea morupeluoa. Ho tseba RMR, phapanyetsano ea khase e phomotseng e ne e lekantsoe ka ho sebelisa lipalo tsa O2 tšebeliso (VO2) le CO2 tlhahiso (VCO2) e fumanoe mahaheng a 10-s a 30-35 min. Barupeluoa ba ile ba lula ba sa sisinyehe 'me ba falimehile, mme 25-30 ea ho qetela ea tekanyo e sebelisitsoe ho bala RMR. Ho nepahala le ho tšepahala ha mokhoa ona bakeng sa tlhahlobo ea RMR li se li thehiloe (26, 27).

Peresente ea mafura a 'mele

Phepelo ea maikutlo a pharalletseng moea e sebelisitsoe ho lekanya liperesente tsa mafura a 'mele le Bod Pod S / T (COSMED USA Inc) ka ho sebelisa mekhoa e khothalelitsoeng motheong oa li-equation tse loketseng lilemo tsa bona le tsa thobalano.28). Sekhahla sa 'mele se ne se baloa e le boima ba' mele (se hlahlojoang ka ho lekanya ka ho toba) se arotsoe ke bophahamo ba 'mele. Peresente ea likhakanyo tsa mafura a 'mele e bonts'itse ts'epahalo ea ho hlahloba liteko (r = 0.92-0.99) le khokahano le likhakanyo tsa mahlakore a mabeli tsa X-ray le likhakanyo tsa boima ba hydrostatic tsa liperesente tsa mafura a 'mele (r = 0.98-0.99) (29).

Mehato ea boitšoaro

Litsebi tsa Litakatso tsa Lijo (30) e sebelisitsoe ho lekola litakatso tsa lijo tse fapaneng. Sekala sena se ile sa fetoloa hore se kenyele le lintlha tsa hore na barupeluoa ba monate ba fumane lijo tse 'ngoe le e' ngoe joang (7). Likarabo li ne li le boemong ba 5-point Likert bakeng sa takatso ea [ho tloha 1 (le ka mohla e lakatsang) ho 5 (e lulang e lakatsa)] le sekala sa lintlha tsa 4 bakeng sa ho rata [ho tloha 1 (ho se rate) le 4 (lerato)]. Inventory ea Lijo tsa Chelete ea mantlha e bonts'itse ts'ebetso ea kahare (α = 0.93), ts'episo ea ts'ebetso ea liteko tsa 2-wkr = 0.86), le kutloisiso ea ho khetholla litlamorao tsa ho kenella (30). Lenaneong la fMRI, tlala ea mots'eare e ile ea hlahlojoa pele ho skena ka ho sebelisa A 100-mm-modal visual analog wadogo e entsoeng ke 0 (e seng tlala) ho 100 (e lapileng haholo).

fMRI paradigm

Tlhahlobo ea fMRI e etsahetse ka har'a 1 wk ea litekanyo tsa DLW le RMR. Ka letsatsi la scan, barupeluoa ba ile ba kopuoa ho ja lijo tsa bona tsa kamehla empa ba hana ho ja kapa ho nwa lino tse tahiloeng tsa 5 h pele ho sekepe. FMRI paradigm e ile ea lekola karabelo ea ho ja le ho ja lijo tse matlafalitsoeng [bona Stice et al (31) bakeng sa lintlha tse ling tsa paradigm]. Stimuli e ne e le litšoantšo tsa 2 (likhalase tsa lebese le metsi) tse bonts'ang ho tlisoa ha 0.5 mL ea chisi ea lebese kapa tharollo e se nang litla, ka ho latellana. The milkshake (270 kcal, 13.5 g mafura, le 28 g tsoekere / 150 mL) e ne e hlophisitsoe ka lebese la 60 g vanilla ice cream, 80 mL 2% lebese, le 15 mL chokolete. Tharollo e seng kotsi, e neng e etselitsoe ho etsisa tatso ea tlhaho ea mathe, e ne e le 25 mmol KCl / L le 2.5 mmol NaHCO3/ L. Ho liteko tsa 40%, tatso ha ea ka ea fanoa ka mor'a cue ho lumella tlhahlobo ea karabo ea neural ho tebello ea tatso e sa kang ea ferekanngoa le ho amohela tatso (liteko tse sa lefelloeng). Ho bile le makhetlo a mangata a 30 a nooang le ho hloka tharollo ea tharollo le phetisetso ea 20 ka bobeli ba senepe se sa lebelloang sa lebese le sutu e sa lefelloeng. Litefiso li ile tsa fanoa ka ho sebelisa lipompo tsa syringe tse khonehang. Li-syndinge tse tlatsitsoeng ke ho sisinya lebese le tharollo e se nang thapo li ile tsa hokahanngoa ka mothapo o mongata o tsoang melomong ea litho tsa tsona 'me tsa isa tatso ho karolo e lumellanang ea leleme. Maikutlo a susumetsang a hlahisoa ka sephutheloana sa seipone sa dijithale / reverse screen screen. Barupeluoa ba ile ba laeloa hore ba metse ha lehetla le hlaha.

Ho iphumanela ho fumana thepa, ho e ntlafatsa le ho e sekaseka

Ho Scanning ho entsoe ka Allegra 3 Tesla hlooho-feela MRI scanner (Motorola Medical Solutions USA Inc). Ho sebelisoa coilage ea linonyana ho fumana boitsebiso ho tsoa bokong bohle. Makala a sebetsang a sebelisitse T2 * -weighted gradient single-shot echo planar imaging sequence (nako ea echo: 30 ms; nako ea ho pheta-pheta: 2000 ms; flip angle: 80 °) ka qeto ea in0plane ea 3.0 × 3.0 mm2 (64 × 64 matrix; 192 × 192 mm2 tšimo ea pono). Likhechana tse mashome a mararo a metso e 'meli tsa 4-mm (ho kenoetsoa kahare; ha ho skip) li ile tsa nkuoa ka sefofaneng sa "anterior commissure-posterior commissure transverse oblique sefofane" ka mokhoa o khethiloeng ke karolo ea midsagittal. Ho ile ha sebelisoa khalemelo e ntle ea ho fumana thepa molemong oa ho lokisa maemo le methalo le ho fokotsa tšusumetso ea molumo o phallang ka nako ea nnete nakong ea tlhaiso-leseling ka sepheo sa ho fokotsa litlamorao tsa ts'ebetso (32). Ha ho morupeluoa ea tsamaileng> 2 mm kapa 2 ° ka tsela efe kapa efe. Ho latellana ka mokhoa o phahameng oa inversion T1-weighted tatellano (MP-RAGE; lebala la pono: 256 × 256 mm2; 256 × 256 matrix; botenya: 1.0 mm; nomoro ea selae: ∼160) e fumanoe.

Litšoantšo tse sa tsebeng letho le tse sebetsang li ne li entsoe ka mokhoa oa letsoho la mokokotlo oa "anterior commissure-posterior commissure Line" le "skather" e katiloeng ka ho sebelisa sesebelisoa sa ho tlosa bokong ho FSL (Version 5.0; Functional Magnetic Resonance Imaging ea sehlopha sa Brain). Lintlha li ile tsa ntlafatsoa tsa ba tsa hlahlojoa ka ho sebelisa SPM8 (Wellcome department of Imaging Neuroscience) ho MATLAB (Version R2009b bakeng sa Mac; The Mathworks Inc). Litšoantšo tse sebetsang li ile tsa fetoleloa molemong 'me litšoantšo tse ka bobeli tsa sebopeho le tšebetso li ile tsa fetoloa ka mokhoa o tloaelehileng ho Montreal Neurological Institute (MNI) T1 template brain (ICBM152). Tsamaiso e tloaelehileng e hlahisitse boholo ba xxel ba 3 mm3 bakeng sa litšoantšo tse sebetsang le boholo ba voxel ea 1 mm3 bakeng sa litšoantšo tse phahameng tsa anatomical. Litšoantšo tse sebetsang li ile tsa ntlafatsoa ka 6-mm FWHM isotropic Gaussian kernel. Setsi se phahameng sa 128-s-high-pass se tlositse lerata le tlase le ho oela holimo. Litšoantšo tsa Anatomical li ile tsa aroloa hore e be ntho e putsoa le e tšoeu ka ho sebelisa lebokose la lisebelisoa la DARTEL ho SPM (33); moelelo oa taba e tsamaeang ea bohlooho o ile oa sebelisoa e le motheo bakeng sa mask a taba a kopaneng pele ho tlhahlobo ea sehlopha.

Ho khetholla libaka tsa boko tse sebelisitsoeng ka tebello ea moputso oa lijo, karabelo ea mali ea oksijene ea mali (BOLD) nakong ea tlhahiso ea mohopolo o sa sebetsoang o neng o supa ho tsamaisoa ha milkshake ho ne ho fapane le karabelo nakong ea tlhahiso ea cue e sa sebetsoang e neng e bontša hore e haufi phano ea tharollo e senang tatso (lebelletsoe lebese> tharollo e lebelletsoeng e se nang tatso). Ho khetholla libaka tse kentsoeng lijo tse monate, ho sebelisitsoe phapang ea (milkshake intake> solution solution). Phapang ena ea maemo ka bomong e sebelisitsoe tlhahlobisong ea khatello ea maikutlo ea EI le RMR le liperesente tsa mafura a 'mele a laoloang bakeng sa ho fumana litlamorao tsa EI tse ikarabellang bakeng sa litlhoko tsa mantlha le lisele tsa adipose. Moeli o bohlale oa sehlopha sa P <0.001 le k (boholo ba sehlopha)> 12 e ne e nkuoa e le bohlokoa ho P <0.05 e lokisitsoe bakeng sa papiso e mengata bokong bohle. Moeli ona o ile oa khethoa ka ho hakanya boreleli ba tlhaho ba data e sebetsang e koahetsoeng ke bohlooho le module ea 3dFWHMx ho software ea AFNI (mofuta oa 05_26_1457) le ho etsa lipapiso tsa 10,000 Monte Carlo tsa lerata le sa reroang ho 3 mm3 ka data eo ka ho sebelisa 3DClustSim module ea software ea AFNI (34). Mokhoa ona o ne o etsoa tlhahlobong e 'ngoe le e' ngoe e ikemetseng, 'me sehlopha sa eona se ne se pota-potiloe ho fihlela palo eohle e haufi. Maemong ohle, ena e ne e le k > 12. Liphetho tse hlahisitsoeng ha lia ka tsa fokotsoa ha li laoloa bakeng sa nako ea ho ilela khoeli le thobalano, nehelano, kapa tlala ntle le ha ho boletsoe ka hosele. Lihokelo tsa stereotactic li hlahisoa sebakeng sa MNI, 'me litšoantšo li hlahisoa setšoantšong se bolelang sa boko ba anatomical bakeng sa sampole. Motheong oa lithuto tsa pejana tse neng li kenyelletsa libaka tsa moputso tse kopaneng tsa dopamine ho arabela tšusumetso ea lijo (3-8, 10), sebaka se hlokolosi sa tlhahlobo ea lithahasello se hlophiselitsoe pele ho striatum (caudate le putamen). Likhakanyo tse fapaneng tsa tšebetso e tloaelehileng ea bo-ralitaba ka motho ka mong li ile tsa hlahlojoa le lenaneo MarsBaR (35) ho arabela litlamorao tsa (lebelletsoe lebese> tharollo e lebelletsoeng e se nang tatso) le (ho noa lebese> ho noa tharollo e se nang tatso) Likhakanyo tsena tse fapaneng li ne li sebelisoa mefuteng ea khatello e neng e laola RMR le liperesente tsa mafura a mmele le EI. Boholo ba litlamorao (r) li nkiloe ho z boleng (z/ √N).

Tumellanong le tlhahlobo ea fMRI, re sebelisitse tlhahlobo ea khatello ea maikutlo bakeng sa RMR le liperesente tsa mafura a 'mele ho lekola hore na EI e amana le phetoho ea boima nakong ea tlhahlobo ea 2-wk DLW, mehato e itlalehileng ea ho lakatsa lijo le ho rata, le tlala. Tlhahlobo ea lipalo-palo e seng ea fMRI, ho kenyelletsa le liteko tsa tlhahlobo ea lipalo-palo tse hlalosang (li bolela ± SDs), le tatellano ea likamano, tlhahlobo ea khatello, le mohlala o ikemetseng t Liteko li entsoe ka software ea SPSS (bakeng sa Mac OS X, mofuta 19; SPSS Inc). Lintlha tsohle tse hlahisitsoeng li ile tsa hlahlojoa bakeng sa lintlha tse nang le tšusumetso e matla haholo.

LIPOTSO

Litekanyetso tsa DLW tsa EI li hlahisitse tšebeliso e matla ea caloric ea 2566 kcal / d (Lethathamo 1). EI e ne e amana haholo le litakatso tsa lijo tse tlalehiloeng (semipartial r = 0.19, P = 0.025) le ho rata lijo (semipartial r = 0.33, P = 0.001) empa eseng tlala (semipartial r = -0.12, P = 0.14). Tlhahlobo ea khatello e senotse kamano e ntle pakeng tsa EI le phetoho ea boima ba 'mele nakong ea 2-wk DLW (semipartial r = 0.85, P <0.001), e khothalelitseng hore EI e ikarabellang bakeng sa litlhoko tsa mantlha le liperesente tsa mafura a 'mele e ka sebetsa e le moemeli oa tekano ea matla. Ha ho bapisoa le basali ba lilemong tsa bocha, banna ba lilemong tsa bocha ba ne ba na le EI e phahameng haholo (P <0.001), RMR (P <0.001), le liperesente tse tlase tsa mafura a 'mele (P <0.001) (Lethathamo 1). Ha ho phapang e 'ngoe e hlokometsoeng pakeng tsa banna ba batona le ba batšehali ba lilemong tsa bocha ((basali ba lilemong tsa bocha)P= 0.09-0.44).

TABLE 1  

Litšobotsi tsa sehlooho le mekhoa ea boits'oaro (n = 155)1

Karabelo ea EI le BOLD

Bakeng sa phapang e lebelletsoeng ea milkshake> tharollo e lebelletsoeng e se nang tatso, EI e hokahane hantle le ts'ebetso ho cortex e holimo ea morao-rao e fumanehang parietal lobe le anterior cingulate cortex (libaka tse amanang le ts'ebetso ea pono le tlhokomelo) (Lethathamo 2, Setšoantšo sa 1), operculum e ka pele (sebaka sa karolo e ka sehloohong ea gustatory cortex), le posterior cingrate cortex (e nahanoang ho koala sekhahla sa ts'usumetso). Ts'ebetso ea bohlokoa e bonts'itsoe hape ho precuneus le cuneus (e 'nileng ea amahanngoa le tlhokomelo / litšoantšo), posterior e bohareng ea temporori ea nakoana (e amanang le memori ea semantic), le libaka tse ling tse fumanehang tseleng ea parietal ea morao-rao (mohlala, supramarginal gyrus) (Lethathamo 2). EI e ne e sa amana haholo le karabelo ea BOLD nakong ea ho kenella ha lebese.

TABLE 2  

Karabelo e BONNGA nakong ea lijo tse lebelletsoeng tse matlafalitsoeng e le ts'ebetso ea tšebeliso ea matla (n = 155)1
TLHAHLISO 1.  

Karabelo e itšetlehileng ka boemo ba oksijene ea mali nakong ea tebello ea lijo tse lebelloang (> lijo tse lebelletsoeng tse se nang tatso) e le ts'ebetso ea matla a kenang (kcal / d) ka sekhahla sa phomolo sa metabolic le liperesente tsa mafura a 'mele a laoloang bakeng sa lateral ...

Kamora ho ikemisetsa ha likhakanyo tse fapaneng tse fapaneng ka ho sebelisa sebaka sa katamelo se khahlisang se hlalositsoeng pejana, ts'ebetso ea striatal ho arabela ho lebella ho ts'oaroa ha lebese (> ho lebella tharollo e se nang tatso) e bonts'itse kamano e nyane e ntle le EI (semipartial r = 0.18, P = 0.038). Leha ho le joalo, litlhahlobo tsa khatello ea maikutlo li bontšitse hore karolelano ea tšebetso nakong ea ho noa lebese (> ho noa joala) e ne e sa amane haholo le EI (semipartial r = 0.04, P = 0.61).

Karabelo ea RMR le BOLD

Re ne re nahana hore ke bohlale ho hlahloba hore na RMR e amana ka kotlolloho le karabelo ea BOLD le ho lekola hore na litlamorao tse bonoang li tsamaisoa ke phapang ea litlhoko tsa mantlha. Ha ho likamano tsa bohlokoa tse ileng tsa bonoa lipakeng tsa RMR le BOLD karabelo nakong ea ho sesa kapa ho lebella tlhokomelo ea lebese.

TŠOHLOA

Ho fumana hore EI e kenyang litlhoko tsa basal le lithane tsa adipose e ne e amana hantle le tlhokomelo, thabo, le karabelo ea meputso ha lithuto li lebelletse tšebeliso ea lijo li pheta liphetho tse boneng ha karabelo ea neural ea batho ba batenya le ba sehlahlo ketsahalong ena e bapisoa (6, 7). Ho tsebo ea rona, thuto ea morao-rao e fane ka bopaki ba nalane bo eketsang EI ho fapana le lithane tsa adipose e feteletseng e ka tsamaisang khatello ena ea maikutlo. Ka ho khetheha, re bone ts'ebetso e matlafalitsoeng nakong ea litebello libakeng tse amanang le ts'ebetso ea pono le tlhokomelo [lateral visual cortex, precuneus, and anterior cingulate (36)], lits'ebetso tsa gustatory [frontal operculum (37)], le sebaka se nahannoeng ho kenyelletsa botlaase ba ho hlohlelletsa [posterior cingulate (38)]. Kamano e nyane empa e ntle e ile ea boela ea bonoa lipakeng tsa ketsahalo ea moputso kapa sebaka sa khothatso (striatum) le EI nakong ea tebello.

Ho ts'ehetsa liphetho tsa hajoale, keketseho ea mafura a mangata ka nako ea 6-mo e ne e amahanngoa le keketseho ea karabelo litšoantšong tse fumanehang habonolo tsa lijo lits'ebetsong tse shebiloeng / ho tsepamisoa le libaka tse phahameng tse amanang le motheo. (39). Ntle le moo, datha ea boits'oaro e bonts'itse hore batho ka boomo ba abetsoeng ho ja lijo tse nang le mafura a matla bakeng sa linako tsa 2-3-wk li bontšitse boikemisetso bo eketsehileng ba ho sebetsa (ke hore, tšusumetso bakeng sa lijo tseo) (40, 41). Liphetho tsena li bonts'a hore EI e fetelletseng e ka kenya letsoho ho hlokeng tlhokomelo e matla, ho phahama le ho putsa libaka bakeng sa litheko tsa ho ja lijo nakong e tlang. Tlhaloso ena e lumellana le mohopolo oa ts'usumetso ea maikutlo a susumetsang (16), e fanang ka moputso oa moputso le litheko tse lebelletsoeng o sebetsa hammoho le nts'etsopele ea boleng bo matlafatsang ba lijo, empa kamora khafetsa moputso oa lijo le litekanyetso tse boletseng moputso ona, moputso o lebelletsoeng oa eketseha. Liphetho tsa hajoale li boetse li tsamaisana le mohlala oa ho ba kotsing ea botenya31, 42), e fanang ka maikutlo a hore karabelo e phahameng maemong a ho tsotella, a pherekano, le ea moputso libakeng tsa lijo e ka eketsa ho tsieleha ho lithahasello tsena, tse khothaletsang keketseho e eketsehileng ka mokhoa oa pele. Ka lebaka la sebopeho sa sephetho sa hajoale, ho ka etsahala hore batho ba nang le ts'oaetso ea tlhaho ea likarolo tsena tsa boko ha ba lebelletse lijo ba ka ba le tšohanyetso ea ho ja ho tlola. Tlhaloso e joalo e tsamaellana le likhopolo tsa botenya bo fetisang moputso (9). Ka hona, ho bohlokoa hore patlisiso ea nako e tlang e leke hore na karabelo e phahameng e bonoang thutong ea morao-rao e bolela esale pele hore na boima ba 'mele bo tla latela kamora nako e telele ho latela.

Re bone hape le ts'ebetso e amanang le EI ho bokaholimo ba nakoana ba moea oa nakoana kahare, bo amanang le memori ea semantic (43, 44). Leha ho le joalo, batho ba batenya ha ba bapisoa le batho ba sehlahlo ba bontšitse karabelo e kholo tikolohong ena ha ho bontšoa litšoantšo tsa lijo tse matlafatsang (3) ho latela se fumanoeng hajoale. Sebaka sena se boetse se hlahisitsoe ka likarolo tse bonts'ang karabelo ea mekhoa eo ho nahanoang hore e hohela batho ba tloaetseng ho sebelisa lithethefatsi. Mohlala, ho batho ba tsubang hona joale, litakatso tse hlahisitsoeng ke ho tsuba li ne li amana le ts'ebetso ea moea o bohareng oa "gyrus"45), mme liphetho tse tšoanang li ile tsa bonoa ho basebelisi ba koae ba hona joale (46). Ka hona, re bone kamano e nyane empa e le ea bohlokoa mabapi le litabatabelo tsa lijo tse tlalehiloeng le EI. Liphetho tsa hona joale li bontša hore leseli la mofuta oa tlhaho le ka hlahisa likelello tsa maikutlo a ho ja lijo tse nang le mafura a mangata, tse nang le tsoekere e ngata mme li ka etsa hore motho a be le takatso e matla kapa e amanang le takatso ea kelello bakeng sa batho ba nang le takatso e phahameng.

Re kile ra tlaleha hore tšebeliso ea ice-cream khafetsa, empa e se e jeletsoeng ka botlalo, e ne e amana le karabelo e fokotsehileng mabapi le tšebeliso ea ice-cream e thehiloeng marang-rang libakeng tsa boko tse amanang le moputso ka har'a dopamine.47). Phuputso ea morao-rao e sebelisitse tekanyo ea EI mme e sa bonts'e kamano. Ka khopolo-taba, kamora ho ja khafetsa mofuta o itseng oa lijo tse fumanehang habonolo, ho ithuta ka moputso ho ithuta ka dopamine ho tloha ho tse ling ka lebaka la ho ja lijo tseo ho etsahale ka karabelo ea mekhoa e boletsoeng e ka ba teng ea lijo, e leng ts'ebetso e tlalehiloeng litekong tsa liphoofolo.48). Mekhoa ea hona joale ea ho nahana le litšenyehelo e fokotsa bokhoni ba ho lekola karabelo ea neural ho lijo tse ngata. Ts'ebeliso ea pejana ea khafetsa ea lijo e lumelletsoe tlhahlobo e boletsoeng ho ja lijo tse ikhethileng, 'me ho shebane le lijo tse tsamaisoang ka har'a sehatisi. Le ha tekanyo ea DLW e sebelisitsoeng thutong ena e fane ka sepheo se nepahetseng le se nepahetseng sa EI, ha e ea lekola bongata kapa matla a lijo tse sebelisoang ka bongata. Ho fihla joale, ho na le lacuna ka har'a lingoliloeng mabapi le tšebelisano lipakeng tsa neural litlamorao tsa tšebeliso ea tloaelo ea lijo le dikahare tsa macronutrient, leha ho le teng liphapang tse tebileng tsa karabelo ea neural lijong tse fapaneng ka litaba tsa macronutrient (49).

Ho bohlokoa ho nahana ka meeli ea thuto ena ha ho hlalosoa se fumanoeng. Joalokaha ho boletsoe, moralo oa likarolo tse fapaneng e ne e le moeli oa bohlokoa hobane re ne re sa tsebe hore na mokhoa oa boikarabello ba methapo o eketsa kotsi ea ho ja ho feta tekano nakong e tlang kapa e bile litlamorao tsa tšebeliso e fetelletseng ea lijo. Mohlala oa hajoale o ntse o lateloa nako e telele, mme mekhatlo e nang le phetoho ea boima e tla fana ka leseli potsong ena; leha ho le joalo, teko e sebetsanang le ho ja e ea hlokahala bakeng sa litšitiso tse tiileng tse ka sitisoang ke likhohlano tse ka bang teng. Tekanyo ea hajoale ea EI e ka sebetsa e le moemeli oa matla a matla a nako ea 2-wk e lekiloeng empa e ke ke ea ikarabella ka nako e le ngoe bakeng sa EI le tšebeliso ea lichelete ebile e ke ke ea nkuoa e le mohato o tobileng oa ho ja ho feta ho bankakarolo bohle. Mohlala, ha ho bapisoa le basali ba lilemong tsa bocha, ba batona ba lilemong tsa bocha ba bonts'a EI e phahameng le RMR empa BMI e ts'oanang le mafura a tlase a mmele, e leng se khothalelitseng hore banna ba lilemong tsa bocha ba sebelise matla a mangata. Liphuputso tsa nako e tlang li lokela ho nahana ka mehato ea ts'ebetso e joalo ka li-accelerometer ho ts'oara EE hantle haeba DLW e sebelisetsoa ho hakanya EI. Leha e le moeli ona, EI e fane ka tekanyetso ea phepelo e etsahetseng maemong a tlhaho a monkakarolo ka nako ea 2-wk e neng e sa itšireletse ho itlhahiseng.

Ka ho phethela, ho hloka boikarabelo nakong ea lijo tse neng li lebelletsoe le ha ho pepesetsoa takatso ea lijo e tlalehiloeng ho batho ba batenya ha ho bapisoa le batho ba sa tšepahaleng (1-8). Patlisiso ea hajoale e phahamisa liphumano tsena ka ho fana ka bopaki ba lipale, tsebong ea rona, hore tekanyo ea sepheo sa ho ja e amana le karabelo ea hyperneural ha ho lebelloa lijo tse ka fumanehang ntle le litlhoko tsa matla a basal le litekanyo tsa lithane tsa adipose. Ka lebaka la sebopeho se akaretsang sa tlhahlobo, tlhahlobo ea nakoana ea liphetho ha e hlake. Ho fihlella kutlwisiso e ntlafalitsoeng ea kahare, lintlha tsa phapang tse bakang ho ja ho feta tekano li ka fana ka leseli le tlatselletso ntlafatsong le phepong ea botena hape e fana ka leseli le bohlokoa ho nts'etsopele ea mananeo a thibelo ea botenya.

lumela hore baa fokola

Re leboha Setsi sa Lewis bakeng sa Neuroimaging Univesithing ea Oregon ka tlatsetso ea bona le thuso ea bona ho nahana lipatlisiso tsena.

Boikarabello ba bangoli e ne e le tse latelang-KSB le ES: ba ne ba ikarabella bakeng sa ho ngola ka letsoho le ho ntlafatsa. KSB: e thusitse ho bokella datha mme e entse tlhahlobo ea data; mme ES: e ne e ikarabella moqapi oa thuto mme e kentse letsoho haholo tlhahlobisong ea data. Ha ho mongoli ea bileng le khohlano ea lithahasello.

Mongolo o botlaaseng ba leqephe

4Maele a sebelisitsoeng: BOLD, boemo ba oksijene ea mali bo its'etleha; DLW, metsi a thathamisitsoeng habeli; EE, ts'ebeliso ea matla; EI, ho ja matla; MNI, Montreal Neurological Institute; RMR, ho phomola tekanyo ea metabolic.

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