Functional involvement of RINF, retinoid-inducible nuclear factor (CXXC5), in normal and tumoral human myelopoiesis.
2009
Retinoids triggers differentiation of acute promyelocytic leukemia (APL) blasts by transcriptional regulation of myeloid regulatory genes. Using a microarray approach, we have identified a novel retinoid-responsive gene ( CXXC5 ) encoding a nuclear factor, retinoid-inducible nuclear factor (RINF), that contains a CXXC-type zinc-finger motif. RINF expression correlates with retinoid-induced differentiation of leukemic cells and with cytokine-induced myelopoiesis of normal CD34+ progenitors. Furthermore, short hairpin RNA (shRNA) interference suggests for this gene a regulatory function in both normal and tumoral myelopoiesis. Interestingly, RINF localizes to 5q31.3, a small region often deleted in myeloid leukemia (acute myeloid leukemia [AML]/myelodysplasia [MDS]) and suspected to harbor one or several tumor suppressor gene.
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