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Forschungsdatenbank PMU-SQQUID

alpha-SNAP is expressed in mouse ovarian granulosa cells and plays a key role in folliculogenesis and female fertility
Arcos, A; de Paola, M; Gianetti, D; Acuna, D; Velasquez, ZD; Miro, MP; Toro, G; Hinrichsen, B; Munoz, RI; Lin, Y; Mardones, GA; Ehrenfeld, P; Rivera, FJ; Michaut, MA; Batiz, LF
SCI REP-UK. 2017; 7: 11765
Originalarbeiten (Zeitschrift)

PMU-Autor/inn/en

Rivera Gomez-Barris Francisco J.

Abstract

The balance between ovarian folliculogenesis and follicular atresia is critical for female fertility and is strictly regulated by a complex network of neuroendocrine and intra-ovarian signals. Despite the numerous functions executed by granulosa cells (GCs) in ovarian physiology, the role of multifunctional proteins able to simultaneously coordinate/modulate several cellular pathways is unclear. Soluble N-ethylmaleimide-sensitive factor (NSF) attachment protein (alpha-SNAP) is a multifunctional protein that participates in SNARE-mediated membrane fusion events. In addition, it regulates cell-to-cell adhesion, AMPK signaling, autophagy and apoptosis in different cell types. In this study we examined the expression pattern of a-SNAP in ovarian tissue and the consequences of alpha-SNAP (M105I) mutation (hyh mutation) in folliculogenesis and female fertility. Our results showed that alpha-SNAP protein is highly expressed in GCs and its expression is modulated by gonadotropin stimuli. On the other hand, a-SNAP-mutant mice show a reduction in a-SNAP protein levels. Moreover, increased apoptosis of GCs and follicular atresia, reduced ovulation rate, and a dramatic decline in fertility is observed in a-SNAP-mutant females. In conclusion, a-SNAP plays a critical role in the balance between follicular development and atresia. Consequently, a reduction in its expression/function (M105I mutation) causes early depletion of ovarian follicles and female subfertility.