15417786mcr200291-sup-240321_2_supp_6335426_qbdktj.avi (5.47 MB)

Supplementary Movie 2 from SPANX Control of Lamin A/C Modulates Nuclear Architecture and Promotes Melanoma Growth

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posted on 2023-04-03, 19:40 authored by Ikrame Lazar, Bertrand Fabre, Yongmei Feng, Ali Khateb, Patrick Turko, Julia M. Martinez Gomez, Dennie T. Frederick, Mitchell P. Levesque, Lea Feld, Gao Zhang, Tongwu Zhang, Brian James, Jeny Shklover, Emily Avitan-Hersh, Ido Livneh, Marzia Scortegagna, Kevin Brown, Ola Larsson, Ivan Topisirovic, Haguy Wolfenson, Meenhard Herlyn, Keith Flaherty, Reinhard Dummer, Ze'ev A. Ronai

Supplementary Movie S2 - 3D representation around the X axis of A375 cell nucleus

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NCI

Melanoma Research Alliance

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ARTICLE ABSTRACT

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. SPANX, a testis protein, interacts with LMNA and controls nuclear architecture and melanoma growth.

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Keywords

Cell Signaling Skin Cancers Melanoma

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CC BY

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