Alterations in gene expression during fasting-induced atresia of early secondary ovarian follicles of coho salmon, Oncorhynchus kisutch

Initiation of sex change and gonadal gene expression in black sea bass (Centropristis striata) exposed to exemestane, an aromatase inhibitor

“…Several sequences were identified that corresponded to well-studied genes involved in steroidogenesis and estrogen signaling, including estrogen receptor alpha (esr1), an estrogen receptor beta (esr2b), gonadal aromatase (cyp19a1a), and 11β-hydroxylase (cyp11b). Four genes previously associated with differential expression during follicular atresia in fish were also used, including caspase 9 (casp9), programmed cell death protein 4 (pdcd4), fatty acid binding protein 11 (fabp11), and replication timing regulatory factor 1, also known as RAP1 interacting protein 1 (rif1) (Agulleiro et al, 2007;Tinguad-Sequeira et al, 2009;Yamamoto et al, 2011Yamamoto et al, , 2016. Partial sequences for apoptotic genes poly(ADPribose) glycohydrolase (parg) and an apoptosis-enhancing nuclease (aen) were also included (Affar et al, 2000;Kawase et al, 2008;Shirai et al, 2013).…”

“…Expression patterns associated with atresia in gonochoristic species were not detected in black sea bass. For instance, atresia in coho salmon (Oncorhynchus kisutch) was characterized by elevated expression of both casp9 and pdcd4, which are well-studied genes in intrinsic, mitochondria-mediated apoptosis pathways and translational repression, respectively (Lankat-Buttgereit and Göke, 2009;Tait and Green, 2010;Yamamoto et al, 2011Yamamoto et al, , 2016. However, black sea bass did not exhibit elevated levels of either mRNA in atretic gonads.…”

Oocytes Skipped Spawning Through Atresia Is Regulated by Somatic Cells Revealed by Transcriptome Analysis in Pampus argenteus

“…More recently, in teleost fishes, some studies also showed that lipid metabolism, oxidative metabolism, and immune cells play pivotal roles in the regulating of follicular atresia. Some related signal pathways and genes were also discovered in Solea senegalensis (Tingaud-Sequeira et al, 2009), Coho salmon (Yamamoto et al, 2016), and Sterlet sturgeon (Akhavan et al, 2016). However, a comprehensive investigation of stage-specific, related gene expression to illustrates that the molecular mechanism of follicular atresia in teleost fishes is currently lacking.…”

Apoptosis and autophagy-related gene transcription during ovarian follicular atresia in European hake (Merluccius merluccius)

“…Although some of these genes participate in processes such as lipid or oxidative metabolism, most of them are usual suspects that participate in regulating apoptotic and autophagic mechanisms (González-Kother et al, 2020). For instance, the sequential activation of caspases essential for proteolytic cleavage and apoptosis-mediated cell death (Andreu-Vieyra and Habibi, 2000) has been demonstrated during follicular atresia in fasted coho salmon (Yamamoto et al, 2016). In the freshwater fishes, Astyanax bimaculatus, Leporium obtusidens and Prochilodus argenteus overexpression of apoptotic and autophagy marker genes caspase-3, Bcl2 protein family genes bcl2 and bax, cathepsin D and beclin-1 has been demonstrated in follicular and theca cells during early and advanced ovarian regression (Morais et al, 2012).…”