吉林大学学报(医学版) ›› 2023, Vol. 49 ›› Issue (5): 1107-1116.doi: 10.13481/j.1671-587X.20230501

• 基础研究 •    下一篇

Sirtuins蛋白在双酚A诱导的雄性生殖系统损伤模型小鼠睾丸组织和GC-2细胞中的表达及其意义

符璐,叶严珏,李江英,汤子怡,尹俐()   

  1. 重庆理工大学药学与生物工程学院生物制药系,重庆 400054
  • 收稿日期:2022-12-25 出版日期:2023-09-28 发布日期:2023-10-26
  • 通讯作者: 尹俐 E-mail:yinli@cqut.edu.cn
  • 作者简介:符 璐(1998-),女,重庆市人,在读硕士研究生,主要从事分子毒理学方面的研究。
  • 基金资助:
    国家自然科学基金青年基金项目(81402655);重庆市科技局自然科学基金面上项目(cstc2019jcyj-msxmX0427)

Expressions of Sirtuins protein in testis tissue and GC-2 cells in male reproductive system damage model mice induced by bisphenol A and their significances

Lu FU,Yanjue YE,Jiangying LI,Ziyi TANG,Li YIN()   

  1. Department of Biopharmaceutical Sciences,School of Pharmacy and Bioengineering,Chongqing University of Technology,Chongqing 400054,China
  • Received:2022-12-25 Online:2023-09-28 Published:2023-10-26
  • Contact: Li YIN E-mail:yinli@cqut.edu.cn

摘要:

目的 探讨Sirtuins(Sirt)蛋白家族在双酚A(BPA)诱导的雄性生殖系统损伤细胞和动物模型中的作用,阐明其对BPA诱导的雄性生殖系统损伤的影响。 方法 40只昆明种小鼠随机分为对照组、低剂量BPA组(给予3 mg·kg-1·d-1 BPA)、中剂量BPA组(给予30 mg·kg-1·d-1 BPA)和高剂量BPA组(给予300 mg·kg-1·d-1 BPA),每组10只。低、中和高剂量BPA组小鼠采用玉米油(0.01 mL·g-1)配成相应浓度BPA灌胃,对照组小鼠给予0.01 mL·g-1玉米油。5周后,检测各组小鼠体质量、睾丸指数和附睾指数,计算机辅助精液分析(CASA)系统检测各组小鼠精子质量,HE染色观察各组小鼠睾丸组织形态表现,Western blotting法检测各组小鼠睾丸组织中Sirt1~Sirt7蛋白表达水平。小鼠GC-2细胞分为0、20、40和80 μmol·L-1 BPA组(给予0、20、40和80 μmol·L-1 BPA处理),EdU荧光染色法检测各组GC-2细胞增殖率,流式细胞术检测不同细胞周期各组GC-2细胞百分率和细胞凋亡率,Western blotting法检测各组GC-2细胞中Sirt1~Sirt7蛋白表达水平。 结果 与对照组比较,高剂量BPA组小鼠的睾丸指数降低(P<0.05);与对照组比较,中和高剂量BPA组小鼠不动精子百分率升高(P<0.01),快速前向运动精子百分率降低(P<0.01),中速前向运动精子百分率降低(P<0.05),高剂量BPA组小鼠精子畸形率升高(P<0.01)。HE染色,各剂量BPA组小鼠曲细精管内各级生精细胞呈现数量减少且排列疏松的趋势。与对照组比较,低剂量BPA组小鼠睾丸组织中 Sirt6蛋白表达水平降低(P<0.01),中剂量BPA组小鼠睾丸组织中Sirt1、Sirt2和Sirt6蛋白表达水平降低(P<0.01),高剂量BPA组小鼠睾丸组织中Sirt1、Sirt2、Sirt3、Sirt4、Sirt5、Sirt6和Sirt7蛋白表达水平降低(P<0.05或 P<0.01)。EdU染色法,与0 μmol·L-1 BPA组比较,20、40和80 μmol·L-1 BPA组细胞增殖率降低(P<0.01)。流式细胞术,作用48 h后,与0 μmol·L-1 BPA组比较,20、40和80 μmol·L-1 BPA组GC-2细胞凋亡率升高(P<0.01)。Western blotting法,作用24 h后,与0 μmol·L-1 BPA组比较,20 μmol·L-1 BPA组小鼠GC-2细胞中Sirt4和 Sirt7蛋白表达水平降低(P<0.05或P<0.01),80 μmol·L-1 BPA组小鼠GC-2细胞中Sirt4和Sirt7蛋白表达水平降低(P<0.05或 P<0.01)。作用48 h后,与0 μmol·L-1 BPA组比较,20 μmol·L-1 BPA组小鼠GC-2细胞中Sirt2、 Sirt3、Sirt4 和Sirt6蛋白表达水平降低(P<0.05或P<0.01),40 μmol·L-1 BPA组小鼠GC-2细胞中Sirt1、Sirt2、Sirt3、Sirt4和Sirt6蛋白表达水平降低(P<0.05或 P<0.01),80 μmol·L-1 BPA组小鼠GC-2细胞中Sirt1、 Sirt2、Sirt3、Sirt4、Sirt 5和Sirt6蛋白表达水平降低(P<0.05或 P<0.01)。 结论 BPA诱导的雄性生殖损伤细胞和动物模型中Sirt1~Sirt7蛋白表达水平降低,加重了BPA诱导的雄性生殖系统损伤。

关键词: 双酚A, Sirtuins, 雄性生殖损伤, 细胞周期, 细胞凋亡

Abstract:

Objective To discuss the effect of Sirtuins(Sirt) protein family on the male reproductive system damage cell and animal models induced by bisphenol A (BPA), and to clarify its effect on the male reproductive system damage induced by BPA. Methods Forty Kunming mice were randomly divided into control group, low dose of BPA group (given 3 mg·kg-1·d-1 BPA), medium dose of BPA group (given 30 mg·kg-1·d-1 BPA), and high dose of BPA group (given 300 mg · kg-1·d-1 BPA),and there were 10 mice in each group. The mice in low, medium, and high doses of BPA groups were gavaged with corn oil (0.01 mL·g-1) mixed with corresponding concentrations of BPA, while the mice in control group were given 0.01 mL·g-1 corn oil. After 5 weeks, the body weights, testis indexes, and epididymal indexes of the mice in various groups were detected; the sperm qualities of the mice in various groups were detected by using computer assisted semen analysis (CASA) system; the morphology of testis tissue of the mice in various groups was observed by HE staining; the expression levels of Sirt1-Sirt7 proteins in testis tissue of the mice in various groups were detected by Western blotting method. The GC-2 cells were divided into 0, 20, 40, and 80 μmol·L-1 BPA groups (treated with 0, 20, 40,and 80 μmol·L-1 BPA). The proliferation rates of the GC-2 cells in various groups were detected by EdU staining; the percentages of the GC-2 cells at different cell cycles and the apoptotic rates of GC-2 cells in various groups were detected by flow cytometry;the expression levels of Sirt1-Sirt7 proteins in the GC-2 cells in various groups were detected by Western blotting method. Results Compared with control group, the testis index of the mice in high dose of BPA group was decreased (P<0.05); compared with control group, the percentage of immobile sperm of the mice in high dose of BPA group was increased (P<0.01), the percentage of rapid progressive sperm was decreased (P<0.01), the percentage of medium progressive sperm was decreased (P<0.05), and the deformity rate of the sperm was increased (P<0.01). The HE staining results showed that the number of spermatogenic cells at all levels in the seminiferous tubules of the mice in different doses of BPA groups showed a decreasing and loosely arranged trend. Compared with control group, the expression level of Sirt6 protein in testis tissue of the mice in low dose of BPA group was decreased (P<0.01), while the expression levels of Sirt1, Sirt2, and Sirt6 proteins in testis tissue of the mice in medium dose of BPA group mice were decreased (P<0.01),the expression levels of Sirt1, Sirt2, Sirt3, Sirt4, Sirt5, Sirt6, and Sirt7 proteins in testis tissue of the mice in high dose of BPA group were decreased (P<0.05 or P<0.01). The EdU staining results showed that compared with 0 μ mol·L-1 BPA group, the proliferation rates of the GC-2 cells in 20, 40, and 80 μmol·L-1 BPA groups were decreased (P<0.01). The flow cytometry results showed that after treated for 48 h, compared with 0 μmol·L-1 BPA group, the apoptotic rates of the GC-2 cells in 20, 40, and 80 μmol·L-1 BPA groups were increased (P<0.01). The Western blotting assay results showed that after treated for 24 h, compared with 0 μmol·L-1 BPA group, the expression levels of Sirt4 and Sirt7 proteins in GC-2 cells of the mice in 20 μmol·L-1 BPA group were decreased (P<0.05 or P<0.01), while the expression levels of Sirt4 and Sirt7 proteins in GC-2 cells of the mice in 80 μmol·L-1 BPA group decreased (P<0.05 or P<0.01). After treated for 48 h, compared with 0 μmol·L-1 BPA group, the expression levels of Sirt2, Sirt3, Sirt4, and Sirt6 proteins in GC-2 cells of the mice in 20 μmol·L-1 BPA group were decreased (P<0.05 or P<0.01), while the expression levels of Sirt1, Sirt2, Sirt3, Sirt4, and Sirt6 proteins in GC-2 cells of the mice in 40 μmol·L-1 BPA group were significantly decreased (P<0.05 or P<0.01),and the expression levels of Sirt 5 and Sirt 6 proteins were decreased (P<0.05 or P<0.01). Conclusion The expression levels of Sirt1-Sirt7 proteins in the male reproductive injury cells and animal models induced by BPA are decreased, which exacerbates the male reproductive system damage induced by BPA.

Key words: Bisphenol A, Sirtuins, Male reproductive damage, Cell cycle, Apoptosis

中图分类号: 

  • R-332