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命运追踪揭示了 Reelin 肝星状细胞(HSCs)和 Desmin HSCs 在激活、迁移和增殖方面的差异。

Fate tracking reveals differences between Reelin hepatic stellate cells (HSCs) and Desmin HSCs in activation, migration and proliferation.

机构信息

College of Veterinary Medicine/Bio-medical Center/, Huazhong Agricultural University, Wuhan, China.

College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China.

出版信息

Cell Prolif. 2023 Dec;56(12):e13500. doi: 10.1111/cpr.13500. Epub 2023 May 28.

Abstract

The activation of hepatic stellate cells (HSCs) is the main cause of liver fibrogenesis in response to different etiologies of chronic liver injuries. HSCs are heterogeneous, but the lack of specific markers to distinguish different HSC subset hinders the development of targeted therapy for liver fibrosis. In this study, we aim to reveal new HSC subsets by cell fate tracking. We constructed a novel ReelinCreERT2 transgenic mouse model to track the fate of cells expressing Reelin and their progeny (Reelin cells). And we investigated the property of Reelin cells, such as differentiation and proliferation, in hepatotoxic (carbon tetrachloride; CCl ) or cholestatic (bile duct ligation; BDL) liver injury models by immunohistochemistry. Our study revealed that Reelin cells were a new HSC subset. In terms of activation, migration, and proliferation, Reelin HSCs displayed different properties from Desmin HSCs (total HSCs) in cholestatic liver injury model but shared similar properties to total HSCs in hepatotoxic liver injury model. Besides, we did not find evidence that Reelin HSCs transdifferentiated into hepatocytes or cholangiocytes through mesenchymal-epithelial transition (MET). In this study, our genetic cell fate tracking data reveal that ReelinCreERT2-labelled cells are a new HSC subset, which provides new insights into targeted therapy for liver fibrosis.

摘要

肝星状细胞(HSCs)的激活是对不同病因的慢性肝损伤导致肝纤维化的主要原因。HSCs 具有异质性,但缺乏区分不同 HSC 亚群的特异性标志物,这阻碍了针对肝纤维化的靶向治疗的发展。在本研究中,我们旨在通过细胞命运追踪来揭示新的 HSC 亚群。我们构建了一种新型的 ReelinCreERT2 转基因小鼠模型来追踪表达 Reelin 及其后代(Reelin 细胞)的细胞命运。我们通过免疫组织化学研究了 Reelin 细胞在肝毒性(四氯化碳;CCl )或胆汁淤积性(胆管结扎;BDL)肝损伤模型中的分化和增殖等特性。我们的研究表明,Reelin 细胞是一种新的 HSC 亚群。在激活、迁移和增殖方面,Reelin HSCs 在胆汁淤积性肝损伤模型中表现出与 Desmin HSCs(总 HSCs)不同的特性,但在肝毒性肝损伤模型中与总 HSCs 具有相似的特性。此外,我们没有发现证据表明 Reelin HSCs 通过间质上皮转化(MET)转化为肝细胞或胆管细胞。在本研究中,我们的遗传细胞命运追踪数据表明,ReelinCreERT2 标记的细胞是一种新的 HSC 亚群,这为肝纤维化的靶向治疗提供了新的见解。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6d58/10693182/528ac8facac2/CPR-56-e13500-g008.jpg

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