Basa reGlucagon muKutonga kweGlucose muRopa
Glucose muropa chinhu chakakosha pakugara zvakanaka kwemuviri wemunhu, uye huwandu hwakakodzera hweglucose hunokosha pakushanda zvakanaka kwemasero nenhengo dzemuviri. Kugara zvakanaka kweglucose muropa kunodzorwa nemahormone akasiyana-siyana, rimwe rawo iglucagon. Glucagon, inowanzo zivikanwa zvishoma pane insulin, inoita basa guru mukugadzirwa kweglucose, kunyanya mumamiriro ekutsanya uye ekushushikana. Chinyorwa chino chinokurukura basa reglucagon mukudzora glucose muropa, kubva pakugadzirwa kwayo uye nzira dzayo kusvika pamigumisiro yayo mukurapa.
1. Kugadzirwa kweGlucagon uye Kubuda
Glucagon ihormone inogadzirwa nemasero ealpha muzvitsuwa zveLangerhans mupancreas. Kugadzirwa kweglucagon kunotanga nekuumbwa kwepreproglucagon, iyo inozoshandurwa kuita proglucagon uye pakupedzisira inonamirwa kuita glucagon inoshanda. Zvinhu zvakawanda zvinogona kukurudzira kuburitswa kweglucagon, zvinosanganisira hypoglycemia (shuga shoma muropa), mamwe maamino acids akadai searginine, uye kushanda kwesympathetic kuburikidza nekuburitswa kweadrenaline.
Mumamiriro ezvinhu akajairwa, kuburitswa kweglucagon kunokonzerwa nekuderera kwehuwandu hweshuga muropa. Iyi ndiyo nzira yemuviri yekuona kuti glucose inoramba iripo senzvimbo huru yesimba, kunyanya kuuropi, iyo inonyanya kuvimba neshuga.
2. Maitiro Ekuita Glucagon
Glucagon inoshanda zvikuru muchiropa, uko inokonzera nzira dzakasiyana-siyana dzekugadzirisa glucose muropa. Heano mamwe emabasa makuru eglucagon:
– Glycogenolysis: Glucagon inokurudzira kuputsika kweglycogen, shuga yakachengetwa muchiropa, kuita shuga yakasununguka kuburikidza nenzira yeglycogenolysis. Maitiro aya inzira inokurumidza yekuwedzera huwandu hweshuga muropa munguva pfupi.
– Gluconeogenesis: Pamusoro pekusimudzira glycogenolysis, glucagon inowedzerawo kugadzirwa kweglucose itsva kubva kune zvisiri makabhohaidhiretsi zvakaita seamino acids, lactate, uye glycerol kuburikidza nenzira yegluconeogenesis. Maitiro aya akakosha panguva yekutsanya kwenguva refu kana nzara.
– Kupisa mafuta: Kunyange hazvo mhedzisiro yayo huru iri pakuchinja kwemakabhohaidhiretsi, glucagon inewo mhedzisiro pakuchinja kwemakabhohaidhiretsi. Glucagon inokurudzira kupiswa kwemamafuta munyama yemafuta, ichiburitsa mafuta acids muropa, ayo anozoshandurwa kuita ma ketone nechiropa seimwe nzira yekupa simba.
3. Mutemo uye Kudyidzana neInsulin
Kudzora shuga muropa kunosanganisira kuenzana pakati pemabasa eglucagon neinsulin. Insulin, inoburitswa nemasero epancreatic beta, inoderedza huwandu hweshuga muropa nekuwedzera kutorwa kweshuga nemasero uye kudzivirira glycogenolysis negluconeogenesis muchiropa. Kusiyana neizvi, glucagon inowedzera huwandu hweshuga muropa kuburikidza nemabasa atsanangurwa pamusoro apa.
Hukama huripo pakati peglucagon neinsulin hwakakosha pakuchengetedza glucose muropa. Semuenzaniso, mushure mekudya, huwandu hweshuga muropa hunokwira, izvo zvinozokurudzira kuburitswa kweinsulin uye zvinodzivisa kuburitswa kweglucagon. Izvi zvinobatsira kudzivirira hyperglycemia nekubvumira glucose kuchengetwa seglycogen kana kushandiswa mukushandiswa kwesimba.
4. Basa reGlucagon muShuga
Mumamiriro ezvinhu akajairwa, shuga yeropa inodzorwa zvakasimba nekushanda pamwe chete kwe insulin ne glucagon. Zvisinei, muchirwere cheshuga, mutemo uyu unokanganiswa. Muchirwere cheshuga cherudzi rwekutanga, pane kushomeka kwe insulin zvachose, zvichikonzera kuwedzera kusingadzoreki kwekuburitswa kwe glucagon. Izvi zvinoguma ne hyperglycemia yakanyanya nekuda kwekuwedzera kwe glycogenolysis uye gluconeogenesis.
Muchirwere cheshuga cherudzi rwechipiri, kunyange hazvo insulin ichiri kugadzirwa, insulin resistance inoderedza kushanda kwayo mukudzvinyirira glucagon. Kusakwanisa kwe insulin uku kunoita kuti insulin iwedzere, iyo isingashande zvakanyanya mukudzvinyirira kushanda kweglucagon, zvichikonzera kuwedzera kwegluconeogenesis uye glycogenolysis, izvo zvinowedzerawo kukonzera hyperglycemia.
Kurapa chirwere cheshuga, kunyanya chirwere cheshuga cherudzi rwechipiri, hakungotarisi chete pakuvandudza mashandiro e insulin uye kuderedza kuramba insulin, asiwo kudzora kuburitswa kwe glucagon uye mashandiro ayo. Mishonga yakaita se GLP-1 (glucagon-like peptide-1) agonists uye DPP-4 (dipeptidyl peptidase-4) inhibitors inoshanda nenzira iyi kuderedza mashandiro e glucagon uye kuwedzera mashandiro e insulin.
5. Tsvagiridzo neKuvandudza Zvichangoburwa
Munguva pfupi yapfuura, kwave nekufarira kuri kuwedzera kwekunzwisisa basa reglucagon uye kutsvaga nzira dzekudzora mashandiro ayo mumamiriro ezvinhu echirwere cheshuga nezvimwe zvirwere zve metabolic. Semuenzaniso, kugadzirwa kweglucagon analogs iyo inogona kushandiswa kudzora hypoglycemia yakanyanya, iyo inowanzoitika kune varwere vane chirwere cheshuga vanoshandisa insulin.
Uyezve, tsvakiridzo pamusoro peglucagon receptor uye nzira dzayo dzekutumira mashoko yakapa ruzivo rutsva pamusoro pekuti glucagon inogona sei kushandiswa pakurapa zvirwere zve metabolic. Glucagon receptor inhibitors (GRA) inzvimbo inoshanda yekutsvagisa inoratidza kugona kudzora huwandu hweshuga muropa nekudzora zvakananga mashandiro eglucagon muchiropa.
Tsvagiridzo iri kuenderera mberiwo kuti tinzwisise basa reglucagon muzvirwere zvisina chirwere cheshuga, zvakaita sekudzora huremu uye metabolism yemafuta mumuviri, izvo zvinogona kupa mhinduro itsva mukurapa kufuta nezvirwere zvemwoyo.
Mhedziso
Glucagon ihormone inobatanidzwa zvakanyanya mukudzora shuga muropa, ichishanda zvinopesana ne insulin. Basa rayo guru nderekuona kuti shuga inowanikwa kana munhu achitsanya kana kuti achinetseka nekuwedzera glycogenolysis uye gluconeogenesis. Kana mutemo uyu ukakanganiswa, sezvinoonekwa muchirwere cheshuga, chiyero pakati peglucagon ne insulin chinokanganiswa, zvichikonzera kukanganiswa kukuru mukukura kweshuga muropa.
Kunzwisisa kwakadzama basa reglucagon mukushandiswa kweglucose mumuviri hakungobatsiri chete mukutarisira nekurapa chirwere cheshuga asiwo kunovhura nzira yekutsvaga nekurapa kutsva kunosanganisira kudzora hormone iyi. Kuenderera mberi nekuedza mukutsvaga nekugadzira mishonga yakatarisana nekugadzirisa mashandiro eglucagon kunogona kupa tariro itsva kuvarwere vane matambudziko epasi rose ekugadzirisa glucose mumuviri, zvichiita kuti kudzora glucose muropa kuve nyore uye kunoshanda.
