Publications by authors named "M T Lavault"

Study Question: Do human granulosa cells (GCs) ingest and destroy apoptotic oocytes?

Summary Answer: Somatic GCs ingest and destroy apoptotic oocytes and other apoptotic substrates through unconventional autophagy-assisted phagocytosis.

What Is Known Already: Most (99%) ovarian germ cells undergo apoptosis through follicular atresia. The mode of cleaning of atretic follicles from the ovary is unclear.

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Article Synopsis
  • Autophagy plays a crucial role in sperm cell development by helping manage damaged organelles, particularly under hyperthermic conditions.
  • Cryptorchidism leads to immature sperm cells, suggesting a problem with germ cell maturation, which this study aims to explore through the analysis of sperm samples from cryptorchid patients and healthy controls.
  • Findings indicate increased autophagy activity in sperm cells from cryptorchid patients, highlighting a potential pathway for improving sperm quality in those affected by this condition.
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CFTR protein regulates electrolyte and fluid transport in almost all tissues with exocrine function, including male reproductive tract. Mutation of CFTR gene causes cystic fibrosis (CF), which affects the function of several organs, and impairs male fertility. The role of CFTR protein in different compartments of male reproductive tract (testis, epididymis, sperm) as well as an impact of CFTR mutation(s) on male fertility phenotype is discussed in relation with the choice of optimal technique for Assisted Reproductive Techniques (ART) management.

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Many epithelial cancers show cell cycle dysfunction tightly correlated with the overexpression of the serine/threonine kinase Aurora A (AURKA). Its role in mitotic progression has been extensively characterised, and evidence for new AURKA functions emerges. Here, we reveal that AURKA is located and imported in mitochondria in several human cancer cell lines.

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Using electron microscopy to localize rare cellular events or structures in complex tissue is challenging. Correlative light and electron microscopy procedures have been developed to link fluorescent protein expression with ultrastructural resolution. Here, we present an optimized scanning electron microscopy (SEM) workflow for volumetric array tomography for asymmetric samples and model organisms (, , ).

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