CHL1 gene acts as a tumor suppressor in human neuroblastoma.

CHL1 gene acts as a tumor suppressor in human neuroblastoma. Oncotarget. 2018 May 25;9(40):25903-25921 Authors: Ognibene M, Pagnan G, Marimpietri D, Cangelosi D, Cilli M, Benedetti MC, Boldrini R, Garaventa A, Frassoni F, Eva A, Varesio L, Pistoia V, Pezzolo A Abstract Neuroblastoma is an aggressive, relapse-prone childhood tumor of the sympathetic nervous system that accounts for 15% of pediatric cancer deaths. A distal portion of human chromosome 3p is often deleted in neuroblastoma, this region may contain one or more putative tumor suppressor genes. A 2.54 Mb region at 3p26.3 encompassing the smallest region of deletion pinpointed CHL1 gene, the locus for neuronal cell adhesion molecule close homolog of L1. We found that low CHL1 expression predicted poor outcome in neuroblastoma patients. Here we have used two inducible cell models to analyze the impact of CHL1 on neuroblastoma biology. Over-expression of CHL1 induced neurite-like outgrowth and markers of neuronal differentiation in neuroblastoma cells, halted tumor progression, inhibited anchorage-independent colony formation, and suppressed the growth of human tumor xenografts. Conversely, knock-down of CHL1 induced neurite retraction and activation of Rho GTPases, enhanced cell proliferation and migration, triggered colony formation and anchorage-independent growth, accelerated growth in orthotopic xenografts mouse model. Our findings demonstrate unambiguously that CHL1 acts ...
Source: Oncotarget - Category: Cancer & Oncology Tags: Oncotarget Source Type: research