SPANX Control of Lamin A/C Modulates Nuclear Architecture and Promotes Melanoma Growth.

Journal Article (Journal Article)

Mechanisms regulating nuclear organization control fundamental cellular processes, including the cell and chromatin organization. Their disorganization, including aberrant nuclear architecture, has been often implicated in cellular transformation. Here, we identify Lamin A, among proteins essential for nuclear architecture, as SPANX (sperm protein associated with the nucleus on the X chromosome), a cancer testis antigen previously linked to invasive tumor phenotypes, interacting protein in melanoma. SPANX interaction with Lamin A was mapped to the immunoglobulin fold-like domain, a region critical for Lamin A function, which is often mutated in laminopathies. SPANX downregulation in melanoma cell lines perturbed nuclear organization, decreased cell viability, and promoted senescence-associated phenotypes. Moreover, SPANX knockdown (KD) in melanoma cells promoted proliferation arrest, a phenotype mediated in part by IRF3/IL1A signaling. SPANX KD in melanoma cells also prompted the secretion of IL1A, which attenuated the proliferation of naïve melanoma cells. Identification of SPANX as a nuclear architecture complex component provides an unexpected insight into the regulation of Lamin A and its importance in melanoma. IMPLICATIONS: SPANX, a testis protein, interacts with LMNA and controls nuclear architecture and melanoma growth.

Full Text

Duke Authors

Cited Authors

  • Lazar, I; Fabre, B; Feng, Y; Khateb, A; Turko, P; Martinez Gomez, JM; Frederick, DT; Levesque, MP; Feld, L; Zhang, G; Zhang, T; James, B; Shklover, J; Avitan-Hersh, E; Livneh, I; Scortegagna, M; Brown, K; Larsson, O; Topisirovic, I; Wolfenson, H; Herlyn, M; Flaherty, K; Dummer, R; Ronai, ZA

Published Date

  • October 2020

Published In

Volume / Issue

  • 18 / 10

Start / End Page

  • 1560 - 1573

PubMed ID

  • 32571981

Pubmed Central ID

  • PMC7541784

Electronic International Standard Serial Number (EISSN)

  • 1557-3125

Digital Object Identifier (DOI)

  • 10.1158/1541-7786.MCR-20-0291

Language

  • eng

Conference Location

  • United States