Paraptosis-like cell death in Wistar rat granulosa cells.
DEVELOPMENT GROWTH & DIFFERENTIATION(2016)
摘要
Follicular atresia, a common process present in all mammals, involves apoptotic and autophagic cell death. However, the participation of paraptosis, a type of caspase-independent cell death, during follicular atresia is unknown. This study found swollen endoplasmic reticulum in the granulosa cells of adult Wistar rats. Calnexin was used as a marker of the endoplasmic reticulum at the ultrastructural and optical levels. The cells with swelling of the endoplasmic reticulum were negative to the TUNEL assay and active caspase-3 immunodetection, indicating that this swelling is not part of any apoptotic or autophagic process. Additionally, immunodetection of the CHOP protein was used as a marker of endoplasmic reticulum stress, and this confirmed the presence of the paraptosis process. These data suggest that paraptosis-like cell death is associated with the death of granulosa cells during follicular atresia in adult Wistar rats.
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关键词
endoplasmic reticulum,follicular atresia,granulosa cells,paraptosis,programmed cell death
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