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Chinese Journal of Applied Physiology ; (6): 43-48, 2018.
Artigo em Chinês | WPRIM | ID: wpr-773805

RESUMO

OBJECTIVE@#To investigate the effect of rosuvastatin on homocysteine (Hcy) induced mousevascular smooth muscle cells(VSMCs) dedifferentiation and endoplasmic reticulum stress(ERS).@*METHODS@#VSMCs were co-cultured with Hcy and different concentration of rosuvastatin (0.1, 1.0 and 10 μmol/L). Cytoskeleton remodeling, VSMCs phenotype markers (smooth muscle actin-α, calponin and osteopontin) and ERS marker mRNAs (Herpud1, XBP1s and GRP78) were detected at predicted time. Tunicamycin was used to induce, respectively 4-phenylbutyrate(4-PBA) inhibition, ERS in VSMCs and cellular migration, proliferation and expression of phenotype proteins were analyzed. Mammalian target of rapamycin(mTOR)-P70S6 kinase (P70S6K) signaling agonist phosphatidic acid and inhibitor rapamycin were used in Rsv treated VSMCs. And then mTOR signaling and ERS associated mRNAs were detected.@*RESULTS@#Compared with Hcy group, Hcy+ Rsv group (1.0 and 10 μmol/L) showed enhanced α-SMA and calponin expression (<0.01), suppressed ERS mRNA levels (<0.01) and promoted polarity of cytoskeleton. Compared with Hcy group, Hcy+Rsv group and Hcy+4-PBA group showed suppressed proliferation, migration and enhanced contractile protein expression (<0.01); while tunicamycin could reverse the effect of Rsv on Hcy treated cells. Furthermore, alleviated mTOR-P70S6K phosphorylation and ERS (<0.01)were observed in Hcy+Rsv group and Hcy+rapamycin group, compared with Hcy group; while phosphatidic acid inhibited the effect of Rsv on mTOR signaling activation and ERS mRNA levels (<0.01).@*CONCLUSIONS@#Rosuvastatin could inhibit Hcy induced VSMCs dedifferentiation suppressing ERS, which might be regulated by mTOR-P70S6K signaling.


Assuntos
Animais , Camundongos , Actinas , Metabolismo , Proteínas de Ligação ao Cálcio , Metabolismo , Desdiferenciação Celular , Células Cultivadas , Estresse do Retículo Endoplasmático , Proteínas de Choque Térmico , Metabolismo , Homocisteína , Proteínas de Membrana , Metabolismo , Proteínas dos Microfilamentos , Metabolismo , Músculo Liso Vascular , Biologia Celular , Miócitos de Músculo Liso , Biologia Celular , Proteínas Quinases S6 Ribossômicas 70-kDa , Metabolismo , Rosuvastatina Cálcica , Farmacologia , Serina-Treonina Quinases TOR , Metabolismo , Proteína 1 de Ligação a X-Box , Metabolismo
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