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纸质出版:2013
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血管紧张素-(1-7)对胰岛素分泌细胞株NIT-1增殖的影响[J]. 中山大学学报(医学科学版), 2013,34(4).
Effect of Angiotensin-(1-7) on Proliferation of Insulin-secreting Cell Line NIT-1[J]. Journal of Sun Yat-sen University (Medical Sciences), 2013, 34(4).
【目的】 探讨血管紧张素[Ang-(1-7)]对小鼠胰岛素分泌细胞株NIT-1细胞增殖的影响。【方法】 NIT-1细胞按以下分组分别处理24 h,采用CCK-8比色法检测细胞增殖。(1)11.1、25.0、30.0、35.0和40.0 mmol/L葡萄糖液,35.0 mmol/L甘露醇分别处理24 h;(2)0、10-7、10-6、10-5和10-4 mol/L Ang-(1-7)分别处理24 h;(3)高糖(HG,35.0 mmol/L)、HG+Ang-(1-7)(10-5 mol/L)、HG+Ang-(1-7)+Mas受体拮抗剂(A-779,10-5 mol/L)和HG+A-779组。【结果】 (1)较11.1 mmol/L组,葡萄糖浓度为35.0和40.0 mmol/L时,NIT-1细胞的增殖明显减低(1.02 ± 0.07 vs 1.21 ± 0.10;0.90 ± 0.05 vs 1.21 ± 0.10,P < 0.05)。(2)在11.1 mmol/L葡萄糖培养条件下,10-7 ~ 10-4 mol/L之间的Ang-(1-7)不影响NIT-1细胞的增殖。(3)与HG组相比,HG+Ang-(1-7)组细胞的增殖率明显增加(1.44 ± 0.24 vs 1.14 ± 0.07,P < 0.05),加入A-779共同孵育可逆转Ang-(1-7)的促增殖效应(1.20 ± 0.02 vs 1.44 ± 0.24,P < 0.05)。【结论】 Ang-(1-7)通过Mas受体拮抗高糖对NIT-1细胞增殖的抑制作用。
【Objective】 To investigate whether Angiotensin-(1-7) can affect the proliferation of mouse insulin-secreting cell line NIT-1. 【Methods】 NIT-1 cells were divided into different groups as follows and cell counting Kit-8 method (CCK-8) was performed to detect the proliferation of NIT-1 at different groups separately: (1) Glucose at concentration of 11.1, 25.0, 30.0, 35.0, and 40.0 mmol/L, mannitol at concentration of 35 mmol/L for 24 h; (2) Ang-(1-7) at concentrations of 0, 10-7, 10-6, 10-5, and 10-4 mol/L for 24 h; (3) High glucose(HG), HG+Ang-(1-7), HG+Ang-(1-7)+Mas receptor inhibitor(A-779), HG+A-779.【Results】 (1) Compared with the 11.1 mmol/L group, the cell proliferation were inhibited in the 35.0 mmol/L and 40.0 mmol/L groups (1.02 ± 0.07 vs 1.21 ± 0.10; 0.90 ± 0.05 vs 1.21 ± 0.10, P < 0.05). (2) No significant difference of the proliferation in NIT-1 cells was found between Ang-(1-7) treatment groups (10-7 ~ 10-4 mol/L). (3) Compared to the HG group, the proliferation of the HG+Ang-(1-7) group was higher (1.14 ± 0.07 vs 1.44 ± 0.24, P < 0.05); Compared to the HG+Ang-(1-7) group, the proliferation of the HG+Ang-(1-7)+A-779 group was decreased (1.44 ± 0.24 vs 1.20 ± 0.02,P < 0.05). 【Conclusion】 By binding to Mas receptor, Ang-(1-7) could reverse the inhibitory effect of high glucose on proliferation of NIT-1 cells.
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