中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (24): 3857-3862.doi: 10.3969/j.issn.2095-4344.0831

• 组织构建实验造模 experimental modeling in tissue construction • 上一篇    下一篇

敲降Gata6基因雄性小鼠模型睾丸功能维持过程中的调控机制

王顺德,李  晶,王澍弘   

  1. 重庆三峡中心医院,重庆市  404000
  • 收稿日期:2018-01-30
  • 通讯作者: 王澍弘,硕士,主治医师,重庆三峡中心医院,重庆市 404000
  • 作者简介:王顺德,男,1962年生,重庆市人,汉族,1986年成都中医药大学毕业,副主任医师,主要从事男性生殖方面的研究。
  • 基金资助:

    重庆市社会事业与民生保障科技创新专项(一般) (cstc2016shmszx130028)

Regulatory mechanism underlying testicular maintenance in a mouse model of Gata6 gene knockdown

Wang Shun-de, Li Jing, Wang Shu-hong   

  1. Chongqing Three Gorges Central Hospital, Chongqing 404000, China
  • Received:2018-01-30
  • Contact: Wang Shu-hong, Master, Attending physician, Chongqing Three Gorges Central Hospital, Chongqing 404000, China
  • About author:Wang Shun-de, Associate chief physician, Chongqing Three Gorges Central Hospital, Chongqing 404000, China
  • Supported by:

    the Science and Technology innovation Project of Social Programs and Strengthening Peasant’s Livelihood of Chongqing, No. cstc2016shmszx130028

摘要:

文章快速阅读:
文题释义:
CRISPR/Cas9技术:CRISPR(Clustered regularly interspaced short palindromic repeats),被称为规律成簇间隔短回文重复,实际上就是一种基因编辑器,是细菌用以保护自身对抗病毒的一个系统,也是一种对付攻击者的基因武器。Cas9蛋白(含有两个核酸酶结构域,可以分别切割DNA两条单链。Cas9首先与crRNA及tracrRNA结合成复合物,然后通过PAM序列结合并侵入DNA,形成RNA-DNA复合结构,进而对目的DNA双链进行切割,使DNA双链断裂。
转录因子:转录因子(transcription factor)是一群能与基因5’端上游特定序列专一性结合,从而保证目的基因以特定的强度在特定的时间与空间表达的蛋白质分子。
摘要
背景:
GATA家族是一类含有两个保守锌指结构的转录调节因子,在人和脊椎动物中广泛表达,同时该家族参与调节组织发育、分化和细胞增殖过程。Gata6属于GATA家族中的一员,其在哺乳动物的心脏、性腺、脾脏、肝、性腺等器官发挥重要功能。
目的:分析Gata6基因在小鼠睾丸中的作用机制。
方法:以小鼠为模型,通过CRISPR/Cas9技术在雄性小鼠体内敲降Gata6基因,并以正常小鼠做对照,组织学观察睾丸形态学变化,Ellisa法测定雄激素相关合成酶,实时定量PCR仪检测相关基因。
结果与结论:①利用CRISPR/Cas9技术成功在小鼠体内敲降Gata6基因;②与对照组相比,2月龄敲降组小鼠睾丸发育迟缓,睾丸及相关生殖器明显变小,精原细胞和精子生成减少,睾丸中雄性信号通路相关基因表达量降低,雄激素水平显著降低(P < 0.05);③结果说明,Gata6在哺乳动物睾丸发育过程中发挥重要作用。

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程
ORCID: 0000-0003-2088-9903(王澍弘)

关键词: 组织构建, Gata6基因, 基因敲降, 生殖发育

Abstract:

BACKGROUND: The GATA transcription factors have two conserved zinc fingers, which are widely distributed in human and vertebrates. This family plays a significant role in tissue development, differentiation and cell proliferation. Especially, Gata6 exerts important effects on heart, gonad, spleen, and liver in mammals.
OBJECTIVE: To study the mechanism of Gata6 gene in mouse testes.
METHODS: Gata6 was knocked down in male mice aged 2 mouths by CRISPR/Cas9 technique, and normal mice were as controls. Histological changes of the mouse testis were observed. Androgen-related synthase levels were detected by ELISA and real-time PCR.
RESULTS AND CONCLUSION: Gata6 was knocked down successfully in mice by CRISPR/Cas9 technique. Testicular developmental retardation, size-reduced testicles and related genitalia, and decreased spermatogonia and spermatogenesis were detected in the knockdown group compared with the control group. The levels of testosterone and androgen-related gene were significantly lower in the knockdown group than the control group (P < 0.05). To conclude, Gata6 plays an important role in mammal testicular development.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Genes, Mice, Knockout, Reproduction, Tissue Engineering

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