Key result
Mild, stable overexpression of NIPP1 in HeLa cells caused a massive induction of mesenchymal lineage genes, associated with actin-based stress fibers and reduced proliferation.
Overexpression of NIPP1 in HeLa cells induces a mesenchymal transition, suggesting that PP1-NIPP1 plays a key role in lineage specification through selective dephosphorylation.
Answers are grounded in this paper and cite their sources.
NIPP1-driven mesenchymal shift in epithelial cells remains hypothesis-generating; in vivo validation required before any translational consideration.
The deletion of the protein phosphatase-1 (PP1) regulator known as Nuclear Inhibitor of PP1 (NIPP1) is embryonic lethal during gastrulation, hinting at a key role of PP1-NIPP1 in lineage specification. Consistent with this notion we show here that a mild, stable overexpression of NIPP1 in HeLa cells caused a massive induction of genes of the mesenchymal lineage, in particular smooth/cardiac-muscle and matrix markers. This reprogramming was associated with the formation of actin-based stress fibers and retracting filopodia, and a reduced proliferation potential. The NIPP1-induced mesenchymal transition required functional substrate and PP1-binding domains, suggesting that it involves the selective dephosphorylation of substrates of PP1-NIPP1.
No takes yet. Share an insight, caveat, or question.
Dessel et al. (2015) studied this question. Overexpression of NIPP1 was evaluated on Induction of genes of the mesenchymal lineage. Mild, stable overexpression of NIPP1 in HeLa cells caused a massive induction of mesenchymal lineage genes, associated with actin-based stress fibers and reduced proliferation.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: