细胞凋亡
肝损伤
DNA损伤
癌症研究
肝细胞
氧化应激
p38丝裂原活化蛋白激酶
纤维化
肝癌
体内
化学
内分泌学
生物
内科学
医学
细胞生物学
体外
信号转导
MAPK/ERK通路
肝细胞癌
生物化学
DNA
生物技术
作者
Johanna Orlik,Sven Schüngel,Laura Elisa Buitrago‐Molina,Silke Marhenke,Robert Geffers,Jessica Endig,Katharina Lobschat,Stephanie Rössler,Benjamin Goeppert,Michael P. Manns,Atan Gross,Arndt Vogel
出处
期刊:Hepatology
[Wiley]
日期:2015-07-01
卷期号:62 (3): 816-828
被引量:9
摘要
Apoptosis is critical for maintaining tissue homeostasis, and apoptosis evasion is considered as a hallmark of cancer. However, increasing evidence also suggests that proapoptotic molecules can contribute to the development of cancer, including liver cancer. The aim of this study was to further clarify the role of the proapoptotic B-cell lymphoma 2 homology domain 3 (BH3)-only protein BH3 interacting-domain death agonist (BID) for chronic liver injury (CLI) and hepatocarcinogenesis (HCG). Loss of BID significantly delayed tumor development in two mouse models of Fah-mediated and HBsTg-driven HCG, suggesting a tumor-promoting effect of BID. Liver injury as well as basal and mitogen-stimulated hepatocyte proliferation were not modulated by BID. Moreover, there was no in vivo or in vitro evidence that BID was involved in DNA damage response in hepatocytes and hepatoma cells. Our data revealed that CLI was associated with strong activation of oxidative stress (OS) response and that BID impaired full activation of p38 after OS.We provide evidence that the tumor-promoting function of BID in CLI is not related to enhanced proliferation or an impaired DNA damage response. In contrast, BID suppresses p38 activity and facilitates malignant transformation of hepatocytes.
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