Loss of Lkb1 cooperates with Braf^V600E and ultraviolet radiation, increasing melanoma multiplicity and neural-like dedifferentiation.

ABSTRACT: The mechanisms that work alongside BRAF^V600E oncogene in melanoma development, in addition to ultraviolet (UV) radiation (UVR), are of great interest. Analysis of human melanoma tumors [data from The Cancer Genome Atlas (TCGA)] revealed that 50% or more of the samples expressed no or low amounts of serine/threonine protein kinase STK11 (also known as LKB1) protein. Here, we report that, in a mouse model, concomitant neonatal Braf^V600E activation and Lkb1 tumor suppressor ablation in melanocytes led to full melanoma development. A single postnatal dose of UVB radiation had no effect on melanoma onset in Lkb1-depleted mice compared with Braf^V600E-irradiated mice, but increased tumor multiplicity. In concordance with these findings and previous reports, Lkb1-n

SUBMITTER: McGrail K 

PROVIDER: S-EPMC11792986 | biostudies-literature | 2025 Feb

REPOSITORIES: biostudies-literature