恒星细胞特定的粘附分子protocadherin 7调节侧侧收缩
James K Carter1, Ming-Chao Tsai1,2, Nicholas Venturini1
1Department of Internal Medicine, Division of Liver Diseases, Icahn School of Medicine at Mount Sinai, New York, New York, USA.
原素7 (PCDH7) 调节肝星细胞 (HSC) 的收缩性. 丢失PCDH7会损害HSC功能,导致细胞骨变化和慢性肝病中侧侧松动.
科学领域:
- 细胞生物学 细胞生物学
- 肝病学 肝病学是一种肝病学.
- 分子生物学分子生物学
背景情况:
- 慢性肝病涉及持续的炎症和肝细胞损伤.
- 激活的肝星细胞 (HSCs) 转化为纤维化纤维纤维细胞.
- 프로토卡德林7 (PCDH7) 是一种卡德林家族成员,在HSC中表达受限,在肝脏中以前没有表征.
研究的目的:
- 为了研究protocadherin 7 (PCDH7) 在肝星细胞 (HSC) 功能中的作用.
- 为了确定PCDH7在HSC收缩性中的参与及其对肝脏鼻状度的影响.
主要方法:
- 生成HSC特定的PCDH7淘汰赛小鼠模型.
- 利用内多光子显微镜在体内评估HSC收缩.
- 已建立的PCDH7-null HSC线路用于体外收缩性测定.
- 分析了与粘附和血管调节相关的基因表达途径.
主要成果:
- 肝脏PCDH7表达被证实是严格限制在HSCs.
- 特定于HSC的PCDH7淘汰赛取消了HSC介导的鼻状收缩.
- 在培养的HSC中PCDH7的损失显著减弱了收缩性和改变了基因表达.
- 在PCDH7淘汰赛细胞中观察到Rho-GTPase信号的受损,F-actin组合的减少,以及焦点粘附的丧失.
结论:
- Protocadherin 7 (PCDH7) 是一种新型的,恒星细胞特异性的调节器,对HSC收缩性起作用.
- 缺少PCDH7会导致细胞骨重塑和侧腔松.
- PCDH7在维持高神经细胞收缩性和鼻腔度方面发挥着至关重要的作用.
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