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Zebrafish establish female germ cell identity by advancing cell proliferation and meiosis

ABSTRACT: Zebrafish establish female germ cell identity by advancing cell proliferation and meiosis

PROVIDER: PRJNA807685 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR18053104_1.fastq.gz	Fastqsanger.gz
	SRR18053104_2.fastq.gz	Fastqsanger.gz
	SRR18053105_1.fastq.gz	Fastqsanger.gz
	SRR18053105_2.fastq.gz	Fastqsanger.gz
	SRR18053106_1.fastq.gz	Fastqsanger.gz

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Similar Datasets

Zebrafish establish female germ cell identity by advancing cell proliferation and meiosis

Project description:In this study, we utilize the RNA-seq of germ cell to uncover the early germ cell development. To obtain fish with defined sex, we crossed domesticated zebrafish with the Nadia strain that has a female-dominant W segment. These fish were placed on a ziwi:GFP background to facilitate sorting of fluorescent germ cells for transcriptomic analysis. We analyzed the transcriptomes of germ cells at 10 to 14 days postfertilization (dpf), when sex dimorphic changes started to appear.

2022-03-07 | GSE196899 | GEO

Zebrafish Establish Female Germ Cell Identity by Advancing Cell Proliferation and Meiosis.

Project description:Zebrafish is a popular research model; but its mechanism of sex determination is unclear and the sex of juvenile fish cannot be distinguished. To obtain fish with defined sex, we crossed domesticated zebrafish with the Nadia strain that has a female-dominant W segment. These fish were placed on a ziwi:GFP background to facilitate sorting of fluorescent germ cells for transcriptomic analysis. We analyzed the transcriptomes of germ cells at 10-14 days postfertilization (dpf), when sex dimorphic changes started to appear. Gene ontology showed that genes upregulated in the 10-dpf presumptive females are involved in cell cycles. This correlates with our detection of increased germ cell numbers and proliferation. We also detected upregulation of meiotic genes in the presumptive females at 14 dpf. Disruption of a meiotic gene, sycp3, resulted in sex reversal to infertile males. The germ cells of sycp3 mutants could not reach diplotene and underwent apoptosis. Preventing apoptosis by disrupting tp53 restored female characteristics in sycp3 mutants, demonstrating that adequate germ cells are required for female development. Thus, our transcriptome and gene mutation demonstrate that initial germ cell proliferation followed by meiosis is the hallmark of female differentiation in zebrafish.

| S-EPMC9013747 | biostudies-literature

DIS3 is essential for male germ cell meiosis and spermatogenesis in mice

Project description:Male germ cell meiosis is essential for generating haploid spermatozoa in mice. Here, we investigate the essential role of DIS3 in male germ cell meiosis in mice. Conditional inactivation of DIS3 in spermatocytes with Stra8-cre transgenic mice have severely impaired meiotic progression, which results in defective meiosis and spermatogenesis. RNA-seq analysis reveals that Dis3 deficiency causes significant dysregulation of the expression of transcripts in mutant testes. Meiosis-associated genes are significantly decreased in the absence of DIS3. Therefore, we show that DIS3 ribonuclease plays a critical role in germ cell meiosis during spermatogenesis in mice.

2021-07-16 | GSE180197 | GEO

SYMPK is essential for meiosis in mouse germ cells

Project description:SYMPK is essential for meiosis in mouse germ cells

| PRJNA550108 | ENA

BMPR1A-mediated BMP signalling ensures correct mitosis-to-meiosis transition in mouse fetal ovarian germ cells, in vivo

Project description:A successful mitosis-to-meiosis transition in germ cells is essential for fertility in sexually reproducing organisms. In mice and humans, it is established that STRA8 expression is critical for meiotic onset in both sexes. Here we show that BMP signalling is also essential, not for STRA8 induction but for correct meiotic progression in mouse fetal ovarian germ cells. Germ cell-specific deletion of Bmpr1a caused aberrant expression of meiotic, pluripotency, and cell cycle genes in E14.5 mouse fetal ovaries. Our results verify a role for BMP signalling in instructing germ cell meiosis in female mice in vivo, and shed light on the regulatory mechanisms underlying fetal germ cell development.

2025-01-16 | GSE268565 | GEO

DIS3 is essential for male germ cell meiosis and spermatogenesis in mice

Project description:DIS3 is essential for male germ cell meiosis and spermatogenesis in mice

| PRJNA747007 | ENA

DIS3L2 regulates male germ cell mesiosis in mice

Project description:Male germ cell meiosis is essential for generating haploid spermatozoa in mice. Here, we investigate the essential role of DIS3L2 in male germ cell meiosis in mice. Conditional inactivation of DIS3L2 in spermatocytes with Stra8-cre transgenic mice have severely impaired meiotic progression, which results in defective meosis and spermatogenesis associated with a Sertoli cell-only syndrome and adult sterility. RNA-seq analysis reveales that Dis3l2 deficiency causes significant dysregulation of the expression of transcripts in mutant testes. Meiosis-assocaited genes are significantly decreased in the absence of DIS3L2. Therefore, we show that DIS3L2 ribonuclease plays a critical role in germ cell meiosis during spermatogenesis in mice.

2021-07-15 | GSE175883 | GEO

Transcription profiling of mammalian male germ cells undergoing mitotic growth, meiosis and gametogenesis in highly enriched cell populations

Project description:We report a comprehensive large-scale expression profiling analysis of mammalian male germ cells undergoing mitotic growth, meiosis and gametogenesis using High Density Oligonucleotide Microarrays and highly enriched cell populations. Among 11955 rat loci investigated, 1268 were identified as differentially transcribed in germ cells at subsequent developmental stages as compared to total testis, somatic Sertoli cells as well as brain and skeletal muscle controls. The loci were organized into four expression clusters that correspond to somatic, mitotic, meiotic and post-meiotic cell types. This work provides information about expression patterns of approximately 200 genes known to be important during male germ cell development. Approximately 40 of those are included in a group of 121 transcripts for which we report germ cell expression and lack of transcription in three somatic control cell types. Moreover, we demonstrate the testicular expression and transcriptional induction in mitotic, meiotic and/or post-meiotic germ cells of 293 as yet uncharacterized transcripts some of which are likely to encode factors involved in spermatogenesis and fertility. This group also contains numerous potential germ cell specific targets for innovative contraceptives. A graphical display of the data is conveniently accessible through the GermOnline database at http://www.germonline.org.

2004-03-01 | E-MEXP-31 | biostudies-arrayexpress

ADAD2 regulates heterochromatin in meiotic and post-meiotic male germ cells via translation of MDC1

Project description:Male germ cells establish a unique heterochromatin domain, the XY-body, early in meiosis. How this domain is maintained through the end of meiosis and into post-meiotic germ cell differentiation is poorly understood. ADAD2 is a late meiotic male germ cell specific RNA binding protein, loss of which leads to post-meiotic germ cell defects. Analysis of ribosome association in Adad2 mutants revealed defective translation of Mdc1, a key regulator of XY-body formation, late in meiosis. As a result, Adad2 mutants show normal establishment but failed maintenance of the XY-body. Observed XY-body defects are concurrent with abnormal autosomal heterochromatin and ultimately lead to severely perturbed post-meiotic germ cell heterochromatin and cell death. These findings highlight the requirement of ADAD2 for Mdc1 translation, the role of MDC1 in maintaining meiotic male germ cell heterochromatin, and the importance of late meiotic heterochromatin for normal post-meiotic germ cell differentiation.

2021-12-11 | GSE190525 | GEO

Direct induction of meiosis from human iPSCs under defined conditions

Project description:Meiotic failure is a significant cause of infertility, but the lack of an in vitro model of human meiosis is a barrier to understanding its mechanism. Here, we establish a method to initiate meiosis directly from male or female human induced pluripotent stem cells (iPSCs). DNMT1 inhibition, retinoid signaling activation, and overexpression of regulatory factors (anti-apoptotic BCL2, and pro-meiotic HOXB5, BOLL, or MEIOC) rapidly activates meiosis over a 15-day protocol. Our protocol bypasses the primordial germ cell stage and directly generates cells expressing genes similar to meiotic oogonia, including oogonia markers, all synaptonemal complex components, and meiotic recombination machinery. DNMT1 inhibition rapidly erases DNA methylation, including at imprinting control regions and promoters of meiotic genes. Microscopy shows key aspects of meiosis, including chromosome axis formation and synapsis in live human cells. Our model of human meiosis provides opportunities for studying this critical reproductive process under chemically defined conditions in vitro.

2025-01-15 | GSE286688 | GEO

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