Protein phosphatase 4 catalytic subunit (PPP4C) mRNA (PPP4C)

Protein phosphatase 4 catalytic subunit (PPP4C) is a highly conserved serine/threonine phosphatase that functions as the catalytic core of the PP4 complex, regulating essential cellular processes such as microtubule organization, DNA damage repair, and cell cycle progression [1][2]. It plays a pivotal role in the DNA damage response by dephosphorylating gamma-H2AX, a marker of DNA double-strand breaks, thereby facilitating the completion of the repair process [3]. In various human malignancies, including breast, lung, and pancreatic cancers, PPP4C is frequently overexpressed and is associated with increased tumor cell proliferation and resistance to apoptosis [4][5]. Targeting PPP4C mRNA through RNA interference (RNAi) or antisense oligonucleotides (ASOs) represents a promising therapeutic strategy to downregulate the protein, thereby sensitizing cancer cells to DNA-damaging therapies like radiation and chemotherapy [6]. Although no clinical-stage drugs currently target PPP4C, preclinical evidence suggests that its inhibition can significantly impair tumor growth [7]. However, because PPP4C is involved in fundamental cellular maintenance and genomic integrity, therapeutic interventions must be carefully designed to avoid significant systemic toxicity and unintended genomic instability [8].

Other names

PP4PP4CPPP4PPH3Protein phosphatase XPP-XProtein phosphatase 4 catalytic subunit

Inhibition of protein expression through mRNA degradation or translational repression via RNA interference (RNAi) or antisense mechanisms; small molecule inhibition of the catalytic activity of the protein phosphatase 4 complex [6][7].