Cloning and expression analysis of the cytochrome P450c17s enzymes during the reproductive cycle in ovoviviparous Korean rockfish (Sebastes schlegeli)

Mu, Weijie; Wen, Haishen; He, Feng; Li, J.F.; Liu, M.; Ma, Ruiqin; Zhang, Y.Q.; Hu, Jian; Qi, Bao X.

doi:10.1016/j.gene.2012.10.064

Cited by 12 publications

(5 citation statements)

References 36 publications

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“…The changes of the three steroid hormone of black rockfish are similar to the previous studies [30,53], but we found the E 2 rapidly declined to the bottom at blastula stage, while the 11-KT peaked at the same time. The asynchronous secretion of estrogen and androgen is different from the oviparous teleost, in which the E 2 and 11-KT synchronously change with the oocyte development [40].…”

Section: Discussionsupporting

confidence: 89%

New Insights on Folliculogenesis and Follicular Placentation in Marine Viviparous Fish Black Rockfish (Sebastes Schlegelii)

Liu

et al. 2021

Preprint

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Background: In viviparous fish, a considerable degree of variation in placental structures have been described. However, no distinct structures are reported in Scorpaenidae.Results: In this study, we demonstrate a new type of folliculogenesis and follicular placentation in Sebastes schlegelii. Before copulation, the germinal epithelium gradually surrounds the oocytes and develops to individually follicles with a stalk-like structure hanging on the ovigerous lamella, which ensures each follicle have access to spermatozoa after copulation. From stage V to early gestation, the cyp17-I highly expressed accompanied by cyp19a1a signals disappearance, and 11-ketotestosterone level keeps rising and peaks at blastula stage, while 17β-estradiol declines to the bottom. Meanwhile, the theca cells rapidly proliferate and invade outwards forming a highly hypertrophied and folded microvillous placenta. This unbalance of hormone might be an important factor driving the theca cells proliferation and invasion. Additionally, some conserved genes related to mammalian placentation are significantly high expression in follicular placenta suggesting the high convergence in vertebrate placenta evolution.Conclusions: This finding provided a new type of placentation pattern for viviparous teleost between the intrafollicular gestation and intraluminal gestation.

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Section: Discussionsupporting

confidence: 89%

New Insights on Folliculogenesis and Follicular Placentation in Marine Viviparous Fish Black Rockfish (Sebastes Schlegelii)

Liu

et al. 2021

Preprint

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“…The changes of the three steroid hormone of black rockfish are similar to the previous studies (Mu et al, 2013, Mori et al, 2003, but we found the E2 rapidly declined to the bottom at blastula stage, while the 11-KT peaked at the same time.…”

Section: Discussionsupporting

confidence: 89%

New insights on folliculogenesis and follicular placentation in marine viviparous fish black rockfish (Sebastes schlegelii)

Xu¹,

Liu²,

Qi³

et al. 2021

Preprint

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In viviparous fish, a considerable degree of variation in placental structures have been described. However, no distinct structures are reported in Scorpaenidae. In this study, we demonstrate a new type of folliculogenesis and follicular placentation in Sebastes schlegelii. Before copulation, the germinal epithelium gradually surrounds the oocytes and develops to individually follicles with a stalk-like structure hanging on the ovigerous lamella, which ensures each follicle have access to spermatozoa after copulation. From stage V to early gestation, the cyp17-I highly expressed accompanied by cyp19a1a signals disappearance, and 11-ketotestosterone level keeps rising and peaks at blastula stage, while 17β-estradiol declines to the bottom. Meanwhile, the theca cells rapidly proliferate and invade outwards forming a highly hypertrophied and folded microvillous placenta. This unbalance of hormone might be an important factor driving the theca cells proliferation and invasion. Additionally, some conserved genes related to mammalian placentation are significantly high expression in follicular placenta suggesting the high convergence in vertebrate placenta evolution.

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“…These findings help to explain the switch in the post-vitellogenic steroidogenic pathway, at least in medaka and tilapia. However, cyp17a1 and/or cyp17a2 transcript levels showed little relationship to MIS production and OM in zebrafish (Wang and Ge, 2004a,b;Ings and Van Der Kraak, 2006), tongue sole, Cynoglossus semilaevis (Chen et al, 2013), Japanese flounder, Paralichthys olivaceus (Ding et al, 2013) and Korean rockfish, Sebastes schlegeli (Mu et al, 2013). Post-transcriptional and/or post-translational mechanisms may participate in determining the overall balance between 17α-hydroxylase and C17, C20 lyase activities.…”

Section: F Transition From Vitellogenesis To Final Oocyte Maturationmentioning

confidence: 99%

Maternal investment in fish oocytes and eggs: The molecular cargo and its contributions to fertility and early development

et al. 2017

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The production of fertile eggs with the capacity to develop into larvae and subsequently into marketable fish is centrally important to the aquaculture industry. This entails not only the programmed production of large numbers of eggs, but also high quality eggs with the potential to support normal development and high survival of offspring to juvenile and later stages of development and growth. Numerous studies highlight the maternal contributions to the development of embryos, including transcripts that regulate cell division and determine oocyte polarity, pattern development during early and late embryonic stages and the transition from maternal to zygotic gene expression and translation. Since most fish embryos develop independently within an enclosed egg envelope, they rely on compounds deposited within the oocytes during their various stages of development. In addition to regulatory nucleic acids (maternal DNA and RNA), these include proteins and other compounds that contribute to the structure and function of the egg envelope and the bulk molecular cargo that will be used as a source of cellular energy and structural components for formation of embryos and larvae. These latter components notably include yolk lipids and proteins deposited during oocyte growth and water acquired at the same time and during cytoplasmic maturation. In this review we highlight recent advances made in revealing the transcripts deposited within the oocyte that contribute to the structural and morphological development of the embryo, and to the regulation of gene expression and translation during oocyte development. Significant advances have been made in revealing the molecular mechanisms of lipid accumulation and metabolism within the oocyte, the intricacies of yolk protein formation via endocytosis of multiple yolk precursor proteins by multiple oocyte receptors, and the complex machinery supporting massive accumulation of water by maturing oocytes of many species. Additionally, many advances have been made in our understanding of the endocrine regulation of all of these processes during oogenesis. We provide here an overview of recent advances in our knowledge on these various aspects of oogenesis and identify several gaps in our knowledge for future studies.

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Cloning and expression analysis of the cytochrome P450c17s enzymes during the reproductive cycle in ovoviviparous Korean rockfish (Sebastes schlegeli)

Cited by 12 publications

References 36 publications

New Insights on Folliculogenesis and Follicular Placentation in Marine Viviparous Fish Black Rockfish (Sebastes Schlegelii)

New Insights on Folliculogenesis and Follicular Placentation in Marine Viviparous Fish Black Rockfish (Sebastes Schlegelii)

New insights on folliculogenesis and follicular placentation in marine viviparous fish black rockfish (Sebastes schlegelii)

Maternal investment in fish oocytes and eggs: The molecular cargo and its contributions to fertility and early development

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