Identification of new participants in the rainbow trout (Oncorhynchus mykiss) oocyte maturation and ovulation processes using cDNA microarrays

Bobe, Julien; Montfort, Jérôme; Tri, Nguyen; Fostier, Alexis

doi:10.1186/1477-7827-4-39

Cited by 114 publications

(79 citation statements)

References 66 publications

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“…The first one, an acid phosphatase tartrate-resistant, is expressed in zebrafish embryonic development (Thisse et al, 2001). Members of the aquaporins family play a role in the ovarian follicle maturation and egg hydration in fishes (Bobe et al, 2006, Fabra et al, 2005Yamaji et al, 2006), and AQP3 has been detected in zebrafish gastrula (Thisse and Thisse, 2004). NPC2, whose name recall a human disorder of cholesterol storage, the NiemannPick disease type C2, is a gene poorly described in the ovary, and involved in sperm maturation in the epididymus (Dacheux et al, 2006).…”

Section: Discussionmentioning

confidence: 98%

Genes expressed in Blue Fin Tuna (Thunnus thynnus) liver and gonads

Chini

Cattaneo

Rossi

et al. 2008

Gene

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Section: Discussionmentioning

confidence: 98%

Genes expressed in Blue Fin Tuna (Thunnus thynnus) liver and gonads

Chini

Cattaneo

Rossi

et al. 2008

Gene

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“…Aromatase is critical for 17b-estradiol production in granulosa cells to regulate vitellogenin synthesis in the liver [66], and expression is only drastically reduced at the post-vitellogenic period [7,36]. Other gene expression changes related to steroidogenesis also occur later in development [6,8,24], as the follicle undergoes a steroidogenic shift at FOM [54].…”

Section: Steroidogenesismentioning

confidence: 94%

“…Prior research in cod, however, has found no antifreeze activity in eggs and larvae [69], and AFPIV function as an antifreeze protein is unclear, as it only renders low thermal hysteresis [22] and is structurally similar to apolipoproteins (lipid-binding proteins) from many fish species. While oocyte lipid accumulation occurs during vitellogenic growth [42], lipid transportation and processing may also be critical later in development, as several genes related to lipid metabolism are upregulated at late vitellogenesis or FOM in rainbow trout, including apolipoprotein C [7,9] and an oocyte-specific oxysterol binding protein [61]. The antifreeze activity of AFPIV may just be coincidental [39], and the true function may involve lipid binding and metabolism in the egg.…”

Section: Lipid Metabolismmentioning

confidence: 97%

“…Attaining maturational and ovulatory competencies in teleost fish ovarian follicles involve orchestrated gene expression at the post-vitellogenic period, including up-and downregulation of steroidogenic enzymes during the transition from estrogen to progestin-dominated steroidogenesis [54] as well as changes in gonadotropin receptors, paracrine regulators, proteases [6], and inflammation-related genes [7,8]. Gene products related to maturational and ovulatory competencies, however, may also be synthesized earlier in development, as vitellogenic follicles are responsive to in vivo exogenous gonadotropin stimulation and can be induced to undergo FOM and ovulation [72].…”

Section: Introductionmentioning

confidence: 99%

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Identification of ovarian gene expression patterns during vitellogenesis in Atlantic cod (Gadus morhua)

Breton

Anderson

Goetz

et al. 2012

General and Comparative Endocrinology

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Follicular maturational competence and ovulatory competence in teleost fish refer to the ability of the ovarian follicle to undergo final oocyte maturation and ovulation, respectively, in response to gonadotropin stimulation and other external cues. Some gene products related to competence acquisition are likely synthesized during vitellogenic growth, as these follicles gain in vivo responsiveness to exogenous gonadotropin stimulation and can be induced to undergo maturation and ovulation. In Atlantic cod (Gadus morhua), gonadotropin responsiveness has been shown to be oocyte size-dependent, and only ovaries containing late-stage vitellogenic follicles can be induced to ovulate. The purpose of the present study was to compare gene expression patterns between mid (unresponsive) and late (responsive) vitellogenic ovaries to identify genes involved in gonadotropin responsiveness and the acquisition of maturational and ovulatory competencies. Representational difference analysis was conducted in two reciprocal comparisons using intact ovarian fragments and follicle wall-enriched tissues, and genes of interest were used in real time quantitative PCR to confirm differential expression. Few differences were detected in intact ovarian fragments, but type IV ice-structuring protein and gephyrin were upregulated later in development and may be involved in lipid and sulfur metabolism, respectively. Candidate gene assays for luteinizing hormone receptor and aromatase also exhibited significant upregulation during vitellogenesis. Many genes were differentially expressed in follicle wall-enriched tissues, including endocrine maturational regulators and smooth muscle genes. Overall, maturational and ovulatory competencies during vitellogenesis in Atlantic cod are associated with up- and downregulation of many genes involved in lipid metabolism, endocrine regulation, and ovulatory preparation.

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“…As a result, much research on estrogen action has been focused on this enzyme. Recently, several reports have also demonstrated the involvement of aromatase in fish gonadal differentiation (Chang et al 1997;Kitano et al 1999;Smith et al 2003;Chang et al 2005) and oocyte maturation (Bobe et al 2006). Transcription factors, such as dmrt1 (doublesex/mab-3 related transcription factor 1) and foxl2 (winged helix/forkhead transcription factor gene 2), were also reported to be involved in vertebrate sex determination and differentiation, including in fish (Nanda et al 1999Raymond et al 2000;Shan et al 2000;Guan et al 2000;Marchand et al 2000;Torres et al 2002;Smith et al 2003;Hudson et al 2005;Wang et al 2004Wang et al , 2007.…”

Section: Isolation and Characterization Of Genes Involved In Catfish mentioning

confidence: 96%

Studies on feminization, sex determination, and differentiation of the Southern catfish, Silurus meridionalis—a review

Liu

Zhang

Wang

2008

Fish Physiol Biochem

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The sex ratio of the feral Southern catfish was reported to be about 1:1, while the fish obtained by artificial fertilization were always female. Hence, we examined the possible influence of the micro-environment during artificial insemination (pH of the ovarian fluid and concentration of the semen) and early development (feed, hatching temperature, and water) on the sex ratio of Southern catfish fry. In order to examine the possibility of the occurrence of gynogenesis during artificial propagation, cytological observations on the insemination processes and the artificial induction of gynogenesis were also performed. However, no male fish were obtained even in these experiments, excluding the possibilities of these micro-environmental changes on catfish sex ratio and the occurrence of gynogenesis during artificial propagation. Female-to-male sex reversal was achieved by treatment with fadrozole (an aromatase inhibitor) and tamoxifen (an estrogen receptor antagonist). Histological analyses on the gonadal development of both female and induced male fish were subsequently performed. Moreover, several genes involved in sex differentiation, such as dmrt1, foxl2, and cyp19, and three subunits of gonadotropin (gth), i.e., gthalpha, lhbeta, and fshbeta, were isolated. Their expression patterns were studied under normal gonadal development and sex reversal conditions. The results revealed that dmrt1, foxl2, and cyp19a were closely related to catfish sex differentiation, and the gth subunits were possibly related to ovarian differentiation and oocyte development. Taken together, we hypothesized that estrogen was highly responsible for the ovarian differentiation and feminization of catfish fry under artificial propagation, although the mechanism involved remains elusive.

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Identification of new participants in the rainbow trout (Oncorhynchus mykiss) oocyte maturation and ovulation processes using cDNA microarrays

Abstract: Background: The hormonal control of oocyte maturation and ovulation as well as the molecular mechanisms of nuclear maturation have been thoroughly studied in fish. In contrast, the other molecular events occurring in the ovary during post-vitellogenesis have received far less attention.

Cited by 114 publications

References 66 publications

Genes expressed in Blue Fin Tuna (Thunnus thynnus) liver and gonads

Genes expressed in Blue Fin Tuna (Thunnus thynnus) liver and gonads

Identification of ovarian gene expression patterns during vitellogenesis in Atlantic cod (Gadus morhua)

Studies on feminization, sex determination, and differentiation of the Southern catfish, Silurus meridionalis—a review

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