Several studies have demonstrated the existence of an autonomous intranuclear phosphoinositide cycle that involves the activation of nuclear PI-PLC and the generation of diacylglycerol (DG) within the nucleus. Although several distinct isozymes of PI-PLC have been detected in the nucleus, the isoform that has been most consistently highlighted as being nuclear is PI-PLC-β1. Nuclear PI-PLC-β1 has been linked with either cell proliferation or differentiation. Remarkably, the activation mechanism of nuclear PI-PLC-β1 has been shown to be different from its plasma membrane counterpart, being dependent on phosphorylation effected by p44/42 mitogen activated protein (MAP) kinase. In this review, we report the most up-dated findings about nuclear PI-PLC-β1, such as the localization in nuclear speckles, the activity changes during the cell cycle phases, and the possible involvement in the progression of myelodisplastic syndrome to acute myeloid leukemia.
|Number of pages||10|
|Journal||Histology and Histopathology|
|Publication status||Published - Oct 2005|
- Myelodisplastic syndromes
ASJC Scopus subject areas
- Cell Biology
- Pathology and Forensic Medicine