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- W3128293882 abstract "Asb2, ankyrin repeat, and SOCS box protein 2 form an E3 ubiquitin ligase complex. Asb2 ubiquitin ligase activity drives the degradation of filamins, which have essential functions in humans. The placenta is a temporary organ that forms during pregnancy, and normal placentation is important for survival and growth of the fetus. Recent studies have shown that approximately 25-30% of knockout (KO) mice have non-viable offspring, and 68% of knockout lines exhibit placental dysmorphologies. There are very few studies on Asb2, with insufficient research on its role in placental development. Therefore, we generated Asb2 knockout mice and undertook to investigate Asb2 expression during organogenesis, and to identify its role in early embryonic and placental development. The external morphology of KO embryos revealed abnormal phenotypes including growth retardation, pericardial effusion, pale color, and especially heart beat defect from E 9.5. Furthermore, Asb2 expression was observed in the heart from E 9.5, indicating that it is specifically expressed during early heart formation, resulting in embryonic lethality. Histological analysis of E 10.5 KO heart showed malformations such as failure of chamber formation, reduction in trabeculated myocardium length, absence of mesenchymal cells, and destruction of myocardium wall. Moreover, the histological results of Asb2-deficient placenta showed abnormal phenotypes including small labyrinth and reduced vascular complexity, indicating that failure to establish mature circulatory pattern affects the embryonic development and results in early mortality. Collectively, our results demonstrate that Asb2 knockout mice have placental defects, that subsequently result in failure to form a normal cardiac septum, and thereby result in embryo mortality in utero at around E 9.5." @default.
- W3128293882 created "2021-02-15" @default.
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- W3128293882 date "2021-03-01" @default.
- W3128293882 modified "2023-09-28" @default.
- W3128293882 title "Heart defects and embryonic lethality in Asb2 knock out mice correlate with placental defects" @default.
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- W3128293882 doi "https://doi.org/10.1016/j.cdev.2021.203663" @default.
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