Karolo ea Glucagon Taolong ea Tsoekere ea Mali
Tsoekere e maling ke karolo ea bohlokoa ea homeostasis ea 'mele oa motho, 'me maemo a nepahetseng a tsoekere a bohlokoa bakeng sa ts'ebetso e tloaelehileng ea sele le litho. Homeostasis ea tsoekere maling e laoloa ke lihormone tse fapaneng, tseo e 'ngoe ea tsona e leng glucagon. Glucagon, eo hangata e sa tsejoeng haholo joaloka insulin, e bapala karolo ea bohlokoa ho metabolism ea tsoekere, haholo-holo tlas'a maemo a ho itima lijo le khatello ea maikutlo. Sengoloa sena se tšohla karolo ea glucagon taolong ea tsoekere maling, ho tloha tlhahisong ea eona le mekhoeng ea eona ho isa litlamoraong tsa eona tsa bongaka.
1. Tlhahiso le ho Ntša Glucagon
Glucagon ke hormone e hlahisoang ke lisele tsa alpha lihlekehlekeng tsa Langerhans tse manyemeng. Ho hlophisoa ha Glucagon ho qala ka ho thehoa ha preproglucagon, e ntan'o fetoloa proglucagon ebe qetellong e khomarela glucagon e sebetsang. Mabaka a 'maloa a ka susumetsa tlhahiso ea glucagon, ho kenyeletsoa hypoglycemia (glucose e tlase maling), li-amino acid tse itseng tse kang arginine, le ts'ebetso ea kutloelo-bohloko ka ho lokolloa ha adrenaline.
Tlas'a maemo a tloaelehileng, tlhahiso ea glucagon e hlahisoa ke ho theoha ha maemo a tsoekere maling. Ena ke mokhoa oa 'mele oa ho netefatsa hore tsoekere e lula e fumaneha e le mohloli oa matla oa mantlha, haholo-holo bakeng sa boko, bo itšetlehileng haholo ka tsoekere.
2. Mokhoa oa Liketso oa Glucagon
Glucagon e sebetsa haholo-holo sebeteng, moo e qalang litsela tse 'maloa tsa metabolism ho eketsa maemo a tsoekere maling. Mona ke tse ling tsa mekhoa ea mantlha ea ts'ebetso ea glucagon:
– Glycogenolysis: Glucagon e hlohlelletsa ho senyeha ha glycogen, tsoekere e bolokiloeng sebeteng, hore e be tsoekere e lokolohileng ka tsela ea glycogenolysis. Ts'ebetso ena ke tsela e potlakileng ea ho phahamisa maemo a tsoekere maling ka nako e khuts'oane.
– Gluconeogenesis: Ntle le ho kenya tshebetsong glycogenolysis, glucagon e boetse e eketsa tlhahiso ya glucose e ntjha ho tswa ho di-substrate tse seng tsa k'habohaedreite tse kang amino acid, lactate, le glycerol ka tsela ya gluconeogenesis. Tshebetso ena e bohlokwa nakong ya ho itima dijo nako e telele kapa ho lapa.
– Lipolysis: Le hoja phello ea eona ea mantlha e le metabolism ea lik'habohaedreite, glucagon e boetse e na le phello metabolism ea mafura. Glucagon e hlohlelletsa lipolysis liseleng tsa mafura, e lokolla li-acid tse mafura maling, tseo ebe sebete se li fetolang hore e be li-ketone e le mohloli o mong oa matla.
3. Taolo le Tšebelisano le Insulin
Taolo ea tsoekere maling e kenyelletsa ho leka-lekana pakeng tsa liketso tsa glucagon le insulin. Insulin, e ntšoang ke lisele tsa beta tsa pancreatic, e fokotsa maemo a tsoekere maling ka ho eketsa ho monngoa ha tsoekere ke lisele le ho thibela glycogenolysis le gluconeogenesis sebeteng. Ka lehlakoreng le leng, glucagon e eketsa maemo a tsoekere maling ka liketso tse hlalositsoeng ka holimo.
Kamano e matla pakeng tsa glucagon le insulin e bohlokoa bakeng sa ho boloka homeostasis ea tsoekere maling. Mohlala, kamora lijo, maemo a tsoekere maling aa nyoloha, e leng se susumetsang tlhahiso ea insulin le ho thibela tlhahiso ea glucagon. Sena se thusa ho thibela hyperglycemia ka ho lumella tsoekere ho bolokoa e le glycogen kapa ho sebelisoa metabolism ea matla.
4. Karolo ea Glucagon ho Lefu la Tsoekere
Tlas'a maemo a tloaelehileng, tsoekere maling e laoloa ka thata ke ts'ebetso ea tšebelisano ea insulin le glucagon. Leha ho le joalo, ho lefu la tsoekere, taolo ena ea sitisoa. Ho lefu la tsoekere la mofuta oa 1, ho na le khaello e felletseng ea insulin, e leng se lebisang keketsehong e sa laoleheng ea tlhahiso ea glucagon. Sena se fella ka hyperglycemia e matla ka lebaka la keketseho ea glycogenolysis le gluconeogenesis.
Le hoja insulin e ntse e hlahisoa, ho hanyetsa insulin ho fokotsa katleho ea eona ho thibeleng glucagon. Ho hanyetsa insulin hona ho fella ka hyperinsulinemia, e leng se sa sebetseng haholo ho thibeleng ketso ea glucagon, e leng se lebisang keketsehong ea gluconeogenesis le glycogenolysis, e leng se boetseng se tlatsetsang ho hyperglycemia.
Kalafo ea lefu la tsoekere, haholo-holo lefu la tsoekere la mofuta oa 2, ha e shebane feela le ho ntlafatsa ts'ebetso ea insulin le ho fokotsa ho hanyetsa insulin, empa hape e shebane le ho laola tlhahiso le ts'ebetso ea glucagon. Lithethefatsi tse kang GLP-1 (glucagon-like peptide-1) agonists le DPP-4 (dipeptidyl peptidase-4) inhibitors li sebetsa ka tsela ena ho fokotsa ts'ebetso ea glucagon le ho ntlafatsa ts'ebetso ea insulin.
5. Patlisiso le Nts'etsopele ea morao-rao
Morao tjena, ho bile le thahasello e ntseng e eketseha ea ho utloisisa haholoanyane karolo ea glucagon le ho fumana litsela tsa ho laola ts'ebetso ea eona maemong a lefu la tsoekere le mafu a mang a metabolism. Mohlala, nts'etsopele ea li-analog tsa glucagon tse ka sebelisoang ho laola hypoglycemia e matla, e atisang ho hlaha ho bakuli ba lefu la tsoekere ba sebelisang insulin.
Ho feta moo, dipatlisiso mabapi le receptor ya glucagon le ditsela tsa yona tsa ho ntsha matshwao di fane ka temohisiso e ntjha mabapi le kamoo glucagon e ka shejwang kateng bakeng sa kalafo ya mafu a metabolism. Dithibela-moleko wa glucagon (GRA) ke sebaka se mafolofolo sa dipatlisiso se bontshang bokgoni ba ho laola maemo a glucose mading ka ho hatella ka ho toba mosebetsi wa glucagon sebeteng.
Phuputso e ntse e tsoela pele ho utloisisa karolo ea glucagon maemong a seng a lefu la tsoekere, joalo ka taolong ea boima le metabolism ea lipid, e leng se ka fanang ka litharollo tse ncha kalafong ea botenya le lefu la pelo.
Qetello
Glucagon ke hormone e amehang haholo taolong ea tsoekere maling, e sebetsang khahlanong le insulin. Mosebetsi oa eona oa mantlha ke ho netefatsa hore tsoekere e fumaneha tlas'a maemo a ho itima lijo kapa a khatello ea maikutlo ka ho eketsa glycogenolysis le gluconeogenesis. Ha taolo ena e sitisoa, joalo ka ha ho bonoa ho lefu la tsoekere, ho leka-lekana pakeng tsa glucagon le insulin hoa sitisoa, e leng se bakang tšitiso e kholo ho homeostasis ea tsoekere maling.
Kutloisiso e tebileng ea karolo ea glucagon ho metabolism ea tsoekere e tla thusa eseng feela taolong le kalafong ea lefu la tsoekere empa hape e tla bula tsela bakeng sa lipatlisiso le mekhoa e mecha ea phekolo e kenyeletsang taolo ea hormone ena. Maiteko a tsoelang pele a lipatlisiso le nts'etsopele ea mekhoa ea phekolo e shebaneng le ho fetola ts'ebetso ea glucagon a ka fana ka tšepo e ncha bakeng sa bakuli ba nang le mathata a lefats'e a metabolism, e leng se etsang hore taolo ea tsoekere maling e sebetse hantle le ho sebetsa hantle.
