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Paraspeckle Component 1 (PSPC1), a Drosophila behavior/human splicing (DBHS) protein family member, represents a pivotal component within paraspeckles. It exerts indispensable functions across a wide array of biological processes, encompassing gene expression, the DNA damage response, the regulation of circadian rhythms, spermatogenesis, cell fate determination, and cancer metastasis. Notably, PSPC1 exhibits overexpression in several types of cancer, including hepatocellular carcinoma, lung cancer, and breast cancer, where it actively contributes to tumorigenesis. This overexpression phenomenon implies that PSPC1 holds the potential to serve as both a biomarker and a therapeutic target for these malignancies. Consequently, a substantial amount of research has been conducted to explore its structure, functions, and role in cancer development and progression. This review article aims to comprehensively summarize the current findings regarding PSPC1.
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http://dx.doi.org/10.62347/RIWH3000 | DOI Listing |
Genome Biol
September 2025
Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, 16419, Republic of Korea.
Cellular senescence is accompanied by extensive genomic reorganization, such as senescence-associated heterochromatin foci and expanded interchromatin compartments, to ultimately affect gene expression. Here, we demonstrate that chromatin structural changes in senescent cells drive significant alterations in the phase behavior and motility of paraspeckles, a type of interchromatin compartment condensate. We observe increased numbers, size, and elongation of paraspeckles harboring NONO and NEAT1_2, driven by elevated levels of those components, consistent with the micellization model of longitudinal growth rather than condensate coalescence.
View Article and Find Full Text PDFNat Protoc
July 2025
Sorbonne Université, CNRS, INSERM, Development, Adaptation and Ageing, Dev2A, Paris, France.
Condensates are receiving increasing attention because of their ability to organize subcellular space. In eukaryotes, nuclear condensates include nucleoli and paraspeckles, and cytoplasmic ones include P-bodies (PBs) and stress granules. One approach to investigate condensate biology is through analyzing their protein and RNA content.
View Article and Find Full Text PDFNat Commun
July 2025
Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, China.
Vacuolation is a common phenomenon observed in many subcellular membrane-less organelles, such as paraspeckles, granules and nucleoli. Previous work suggests that such dynamic sub-structuration can be a result of charge disproportion at super-stoichiometric ratios of the assembling component. In this work, we demonstrate that other than remodeling the large coacervate-constituting components, the introduction of small charged motifs, amino acids, can also lead to the formation of static vacuoles in the coacervate droplets.
View Article and Find Full Text PDFAm J Cancer Res
May 2025
Department of Medical Oncology, Cancer Center of Zhejiang University, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University Hangzhou 310016, Zhejiang, China.
Paraspeckle Component 1 (PSPC1), a Drosophila behavior/human splicing (DBHS) protein family member, represents a pivotal component within paraspeckles. It exerts indispensable functions across a wide array of biological processes, encompassing gene expression, the DNA damage response, the regulation of circadian rhythms, spermatogenesis, cell fate determination, and cancer metastasis. Notably, PSPC1 exhibits overexpression in several types of cancer, including hepatocellular carcinoma, lung cancer, and breast cancer, where it actively contributes to tumorigenesis.
View Article and Find Full Text PDFCell Death Discov
May 2025
Department of Systems Biology, College of Life Science and Biotechnology, Yonsei University, Seoul, Republic of Korea.
Non-POU domain-containing octamer-binding protein (NONO) is a multifunctional member of the Drosophila behavior/human splicing (DBHS) protein family with DNA- and RNA-binding activity. NONO is highly expressed in various types of cancer, and excessive O-GlcNAcylation has also been implicated in tumorigenesis. Although recent studies revealed that NONO is O-GlcNAcylated and that this modification is involved in DNA damage repair, it remains unknown whether O-GlcNAcylation of NONO regulates cancer cell proliferation.
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