Kudzora Kumanikidzwa Kweropa neRenin-Angiotensin System: Maitiro uye Zvinetso zveKliniki
Pendauluan
Kumanikidzwa kweropa chinhu chakakosha pakushanda kwemuviri chinokanganisa hutano hwedu hwese. Kudzora BP kwakakodzera kwakakosha pakuchengetedza mashandiro akanaka enhengo dzemuviri, kuvandudza hupenyu, uye kudzivirira zvirwere zvakasiyana-siyana zvemwoyo. Imwe yenzira huru dzinodzora BP isystem ye renin-angiotensin. Chinyorwa chino chichatsanangura mashandiro anoita system ye renin-angiotensin mukutonga BP uye zvazvinoreva kukiriniki.
Zvikamu zveRenin-Angiotensin System
Sisitimu ye renin-angiotensin ine zvikamu zvakakosha zvakasiyana-siyana, zvinosanganisira renin, angiotensinogen, angiotensin I, angiotensin II, uye angiotensin-converting enzyme (ACE). Chikamu chimwe nechimwe chinoita basa rakakosha mukuita uku kwakaoma.
1. Renin: Iyi enzyme inogadzirwa nemasero ejuxtaglomerular ari muitsvo nekuda kwezvikonzero zvakasiyana-siyana, zvakaita sekuderera kweropa, kudzikira kwehuwandu hwesodium muitsvo, kana kushanda kwetsinga dzinobatsira mutsinga.
2. Angiotensinogen: Puroteni iyi inogadzirwa nechiropa uye inotenderera muropa. Renin inokurudzira kushandurwa kweangiotensinogen kuita angiotensin I.
3. Angiotensin I: Iyi ipeptide isingashande zvakanyanya, iyo inozoshandurwa kuita angiotensin II neangiotensin converting enzyme (ACE) inowanikwa zvakanyanya mumapapu.
4. Angiotensin II: Iyi ipeptide inoshanda ine mhedzisiro yakakosha, kusanganisira vasoconstriction, kuwedzera kuburitswa kwealdosterone kubva muadrenals, uye kukurudzira nyota.
Mashandiro anoita Renin-Angiotensin System
Danho 1: Kuburitswa kweRenin
Kukurudzirwa kwekutanga kwekuburitswa kwerenin kunobva kumabaroreceptors ari mutsinga dzeitsvo uye system yetsinga dzinobatsira. Kana BP yadzikira, mabaroreceptors anoona shanduko yacho otumira zviratidzo kuitsvo kuti ibudise renin. Uyezve, kudzikira kwehuwandu hwesodium muitsvo dzinoita filtrate kunogonawo kukurudzira masero ejuxtaglomerular kuti abudise renin. Kuita kwesympathetic kunokurudzira tsinga dze beta-adrenergic, idzo dzinobva dzatanga kuburitswa renin.
Danho rechipiri: Kushandurwa kweAngiotensinogen kuita Angiotensin I
Renin inoburitswa ichasangana neangiotensinogen muropa, zvichikonzera kushandurwa kweangiotensinogen kuita angiotensin I. Angiotensin I pachayo imorekuru isingashande zvakanyanya, asi inoshanda senzira yekutanga angiotensin II.
Danho rechitatu: Kushandurwa kweAngiotensin I kuita Angiotensin II
Angiotensin-converting enzyme (ACE), inowanikwa zvakanyanya mu endothelium yetsinga dzeropa dzemapapu, yobva yabatsira kushandurwa kwe angiotensin I kuita angiotensin II. Angiotensin II ndiyo molekile huru ine chekuita nemhedzisiro yakawanda yemuviri ye renin-angiotensin system.
Danho rechina: Mhedzisiro yeAngiotensin II
Angiotensin II ine mabasa akawanda akakosha anobatsira mukugadzirisa BP:
1. Kuvharwa kweropa: Angiotensin II inokonzera kuvharwa kweropa kweropa mu arteriolar, izvo zvinowedzera kuramba kweropa rose uye, pakupedzisira, zvinowedzera BP.
2. Kuburitswa kweAldosterone: Angiotensin II inokurudzira adrenal cortex kuti iburitse aldosterone, hormone inowedzera kutorwazve kwesodium muitsvo. Kutorwazve kwesodium kunokonzera kuwedzera kwehuwandu hweropa uye BP.
3. Inosimudzira Nyota: Nekukurudzira hypothalamus, angiotensin II inowedzera chishuwo chekunwa mvura, izvo zvinobatsirawo kuwedzera huwandu hweropa neBP.
4. Vasopressin: Angiotensin II inogonawo kuwedzera kuburitswa kwevasopressin (hormone inoderedza diuretic), iyo inowedzera kutorwazve kwemvura neitsvo uye inobatsira kuchengetedza huwandu hweropa nekumanikidzwa.
Zvinokonzera Kurwara
Kudzora BP nehurongwa hwe renin-angiotensin kune zvakunobatsira zvikuru pakukura nekutarisira zvirwere zvakasiyana-siyana, kunyanya BP nekushaya simba kwemoyo. Kunzwisisa zvakakwana hurongwa uhwu kwakaita kuti pave nenzira dzakasiyana-siyana dzinoshanda dzekurapa.
Mishonga inodzivirira ACE (Angiotensin-Converting Enzyme Inhibitors)
Mishonga inodzivirira ACE imhando yemishonga inodzivirira kushandurwa kweangiotensin I kuita angiotensin II. Nekuderedza huwandu hweangiotensin II, mishonga iyi inogona kuderedza kuvharika kweropa uye huwandu hweropa, zvichizopedzisira zvaderedza BP. Mishonga inodzivirira ACE inoshandiswa zvakanyanya mukurapa BP uye kutadza kushanda zvakanaka kwemoyo.
MaAngiotensin II Receptor Blockers (ARBs)
MaARB ndeimwe mhando yemishonga inovhara angiotensin II type 1 (AT1) receptor. Nekudzivisa kushanda kweangiotensin II pareceptor iyi, maARB anodzivirira vasoconstriction uye kuburitswa kwealdosterone, nokudaro zvichideredza BP. MaARB anowanzo kunyorerwa varwere vasingakwanise kushivirira migumisiro yeACE inhibitors.
Vadzivisi veAldosterone
Mishonga inodzivirira aldosterone inodzivisa migumisiro yealdosterone paitsvo, nokudaro ichideredza kudzoserwa kwe sodium nemvura. Mishonga iyi inogonawo kubatsira mukurapa BP nekushaya simba kwemoyo, kunyanya kuvarwere vane aldosteronism yakawandisa.
Zvinodzivirira Renin
Mishonga inodzivirira renin yakaita sealiskiren inodzivirira kushandurwa kweangiotensinogen kuita angiotensin I, izvo zvinoderedzawo kugadzirwa kweangiotensin II. Kunyangwe isingawanzoitiki seACE inhibitors neARBs, mishonga inodzivirira renin inobatsira zvikuru mukurapa BP.
Mhedziso
Sisitimu ye renin-angiotensin ndeimwe yenzira dzakakosha mukutonga BP. Kuburikidza ne network yakaoma yema enzymes nema peptides, sisitimu iyi inodzora BP kuburikidza nemigumisiro yayo pa vasoconstriction, kuburitswa kwe aldosterone, uye kukurudzira nyota. Kunzwisisa kwakadzama kwenzira idzi kwakagonesa kugadzirwa kwemishonga inoshanda yekurapa BP nezvimwe zvirwere zvemwoyo. Nokudaro, kuenderera mberi nekutsvaga munzvimbo iyi kune mukana wakakura wekuvandudza mhedzisiro yekiriniki yevarwere pasi rese.
