Paraspeckle Component 1: a multifunctional RNA binding protein

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.