Angiotensin II type 1 receptor autoantibodies induces INS-1 islet β-cell apoptosis by upregulation of autophagy / 中国病理生理杂志
Chinese Journal of Pathophysiology
; (12): 474-480, 2018.
Article
em Zh
| WPRIM
| ID: wpr-701147
Biblioteca responsável:
WPRO
ABSTRACT
AIM:
To explore whether the angiotensin II type 1 receptor autoantibodies(AT1-AA)induces islet β-cell apoptosis and whether autophagy is involved in the process.METHODS:
The INS-1 cells treated with AT1-AA at 10-6mol/L for 24 h,and then the apoptosis was analyzed by flow cytometry,Western blot and Hoechst 33258 staining.In addition,the expression of autophagy-related proteins such as LC3 and beclin 1 were determined by Western blot.The effects of AT1-AA on the apoptosis,autophagy and viability of INS-1 cells with or without 3-methyladenine(3-MA;a com-mon autophagy inhibitor)or telmisartan(an angiotensin Ⅱ type 1 receptor blocker)pretreatment, were detected by flow cytometry,Western blot and CCK-8 assay.RESULTS:
Treatment with AT1-AA at 10 -6mol/L for 24 h significantly re-duced the cell viability(P<0.05).Compared with the negative IgG control group,the apoptotic cells increased after incu-bation with AT1-AA for 12 h,24 h and 36 h,respectively(P<0.05).Moreover,the protein levels of LC3 and beclin 1 also increased gradually with the prolongation of treatment time,and the elevation of apoptosis and autophagy were blocked by telmisartan.After pretreatment with 3-MA, the apoptotic rate of the cells was obviously decreased compared with the cells treated with AT1-AA alone.CONCLUSION:
AT1-AA induces the apoptosis of INS-1 islet βcells by upregulating autophagy via the angiotensin Ⅱtype 1 receptor pathway.
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Base de dados:
WPRIM
Idioma:
Zh
Revista:
Chinese Journal of Pathophysiology
Ano de publicação:
2018
Tipo de documento:
Article