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Splicing factor SRSF1 is indispensable for regulatory T cell homeostasis and function

ABSTRACT: Purpose: The goals of this study are to determine the role of the serine/ arginine-rich splicing factor 1 (SRSF1) in regulatory T cells

ORGANISM(S): Mus musculus

PROVIDER: GSE173268 | GEO | 2021/05/31

REPOSITORIES: GEO

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Splicing factor SRSF1 controls T cell hyperactivity and systemic autoimmunity

Project description:Purpose: The goals of this study are to determine the role of the serine/ arginine-rich splicing factor 1 (SRSF1) in T cells and autoimmune disease.

2019-08-24 | GSE136286 | GEO

SRSF1 governs progenitor-specific alternative splicing to maintain adult epithelial tissue homeostasis and renewal

Project description:Alternative splicing generates distinct mRNA variants and is essential for development, homeostasis, and renewal. Proteins of the serine/arginine (SR)-rich splicing factor family are major splicing regulators that are broadly required for organ development as well as cell and organism viability. However, how these proteins support adult organ function remains largely unknown. Here, we used the continuously growing mouse incisor as a model to dissect the functions of the prototypical SR-family protein SRSF1 during tissue homeostasis and renewal. We identified an SRSF1-governed alternative splicing network that is specifically required for dental proliferation and survival of progenitors but dispensable for the viability of differentiated cells. We also observed a similar progenitor-specific role of SRSF1 in the small intestinal epithelium, indicating a conserved function of SRSF1 across adult epithelial tissues. Thus, our findings define a regulatory mechanism by which SRSF1 specifically controls progenitor-specific alternative splicing events to support adult tissue homeostasis and renewal.

2022-01-18 | GSE193492 | GEO

SRSF1-mediated alternative splicing is required for spermatogonial stem cell differentiation and mitotic-to-meiotic transition [RNA-Seq]

Project description:Alternative splicing (AS) plays significant roles in fundamental biological activities. AS also are prevalent in the testis, but the regulations of alternative splicing in spermatogenesis is vague. Here, we report that Serine/arginine-rich splicing factor 1 (SRSF1), plays critical roles in alternative splicing and male reproduction. Male germ cell-specific deletion of Srsf1 led to complete infertility and abnormal spermatogenesis. We further demonstrated that Srsf1 is required for spermatogonial stem cell differentiation and mitotic-to-meiotic transition. Mechanistically, by combining RNA-seq data with LACE-seq data, we showed that SRSF1 regulatory networks have functions in spermatogenesis. Particularly, we found that SRSF1 affects the AS of Stra8 in a direct manner and Dazl, Dmc1, Mre11a, Syce2 and Rif1 in an indirect manner. Taken together, our findings demonstrate that SRSF1 has crucial functions in spermatogenesis and male fertility by regulating alternative splicing.

2024-03-31 | GSE226550 | GEO

SRSF1-mediated alternative splicing is required for spermatogonial stem cell differentiation and mitotic-to-meiotic transition [LACE-seq]

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SRSF1 is involved in alternative mRNA splicing in granulosa cell survival

Project description:Granulosa cells abnormalities are one of the characteristics of premature ovarian insufficiency (POI). Abnormal expression of serine/arginine-rich splicing factor 1 (SRSF1) can causes a variety of diseases, but the role of SRSF1 in mouse granulosa cells has been poorly reported. In this study, we found that SRSF1 was expressed in the nuclei of both mouse oocytes and granulosa cells. Specific knockout of SRSF1 in granulosa cells was performed using Foxl2-creERT2 mice, and morphological staining showed that follicular development was blocked. In addition, granulosa cell proliferation decreased and cell apoptosis increased. The differential gene Gene Ontology (GO) analysis of RNA-Seq results showed abnormal expression of DNA repair, cell killing and other signaling pathways. Alternative splicing (AS) analysis showed that SRSF1 affected DNA damage in granulosa cells by regulating genes related to DNA repair. In conclusion, SRSF1 in granulosa cells affects female reproduction by controlling the development of follicles through regulating granulosa cell DNA repair related genes.

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Effect of SRSF1 splicing factor knockdown in the physiology and function of cytotoxic CD8 T lymphocytes and a potential molecular mechanism in viral immunopathogenesis

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2022-07-31 | GSE201028 | GEO

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Project description:PRMT1 is highly expressed in breast tumors, and has been suggested to play a vital role in breast tumorigenesis, but the underlying molecular mechanisms remain to be fully characterized. Here, we reveal that PRMT1 exhibits a wide-spreading role in RNA alternative splicing based on transcriptome analysis, with a preference for exon inclusion in a large cohort of oncogenic genes. Profiling PRMT1 methylome reveals that the arginine/serine-rich splicing factor SRSF1 is heavily arginine-methylated by PRMT1, which is critical for SRSF1 phosphorylation, SRSF1 binding with RNA, and PRMT1-induced exon inclusion. In breast tumors, the overexpression of PRMT1 is associated with high levels of SRSF1 arginine methylation and aberrant exon inclusion in those oncogenic genes. Accordingly, PRMT1-mediated SRSF1 methylation and exon inclusion events are found to be critical for the malignant behaviors of breast cancer cells. Furthermore, we identified and characterized a selective PRMT1 inhibitor iPRMT1, which is potent in inhibiting PRMT1-mediated SRSF1 methylation and exon inclusion events, and breast cancer cell growth both in vitro and in vivo. Combination treatment with iPRMT1 and inhibitor targeting SRSF1 phosphorylation, SPHINX31 or SRPIN340, exhibits synergistic effects on suppressing breast cancer cell growth, strengthening the cross-talk between arginine methylation and phosphorylation in SRSF1. In conclusion, our data uncover a key mechanism underlying PRMT1-mediated gene alternative splicing, demonstrating targeting PRMT1 has great potential to treat breast cancer in clinic.

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