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- W2079787316 abstract "To investigate spatial and temporal distributions of apoptosis in the embryonic chick heart and its relation to different tissue types, we examined apoptosis in the embryonic chick heart from Hamburger and Hamilton stage 17 through 3 days after hatching. MF20 antibody, alpha-smooth muscle actin (SMA) antibody and EAP-300 antibody were applied to delineate specific cell types. During early development of the embryonic chick heart, very few apoptotic cells were detected. The first distinctive zone of apoptosis was observed in the outflow tract at stage 25. This focus was most prominent during septation of the pulmonary artery from the aorta (i.e., between stages 28 and 29), and diminished to virtually background level by stage 32, except in the subconal regions. Subsequently, remarkable apoptosis appeared in the atrioventricular cushions by stage 26, peaked at stages 29-31, and dropped significantly thereafter. Characteristic distribution patterns of apoptotic cells were also detected in the cardiac conduction tissues, including the His bundle, the bundle branches, and the ventricular trabeculae. After stage 36, cell death dropped to background level, except in developing coronary vessels. MF20 and TUNEL double staining revealed that apoptosis in cardiomyocytes was limited to a few specific regions, much less than in cushion tissues. SMA and TUNEL double staining demonstrated that vascular structures were the major foci of apoptosis from stage 40 to 44, whereas adjacent perivascular Purkinje cells displayed significantly less cell death at these stages. The characteristic spatiotemporal locations of apoptosis parallel the morphologic changes and tissue differentiation during heart development, suggesting that apoptosis is crucial to the transformation of the heart from a simple tube to a complex multichambered pump." @default.
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- W2079787316 date "2002-01-01" @default.
- W2079787316 modified "2023-10-07" @default.
- W2079787316 title "Spatiotemporal and tissue specific distribution of apoptosis in the developing chick heart" @default.
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- W2079787316 doi "https://doi.org/10.1002/dvdy.1244" @default.
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