Stress-induced tunneling nanotubes support treatment adaptation in prostate cancer.

Abstract:

:Tunneling nanotubes (TNTs) are actin-based membranous structures bridging distant cells for intercellular communication. We define roles for TNTs in stress adaptation and treatment resistance in prostate cancer (PCa). Androgen receptor (AR) blockade and metabolic stress induce TNTs, but not in normal prostatic epithelial or osteoblast cells. Co-culture assays reveal enhanced TNT formation between stressed and unstressed PCa cells as well as from stressed PCa to osteoblasts. Stress-induced chaperones clusterin and YB-1 localize within TNTs, are transported bi-directionally via TNTs and facilitate TNT formation in PI3K/AKT and Eps8-dependent manner. AR variants, induced by AR antagonism to mediate resistance to AR pathway inhibition, also enhance TNT production and rescue loss of clusterin- or YB-1-repressed TNT formation. TNT disruption sensitizes PCa to treatment-induced cell death. These data define a mechanistic network involving stress induction of chaperone and AR variants, PI3K/AKT signaling, actin remodeling and TNT-mediated intercellular communication that confer stress adaptative cell survival.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Kretschmer A,Zhang F,Somasekharan SP,Tse C,Leachman L,Gleave A,Li B,Asmaro I,Huang T,Kotula L,Sorensen PH,Gleave ME

doi

10.1038/s41598-019-44346-5

subject

Has Abstract

pub_date

2019-05-24 00:00:00

pages

7826

issue

1

issn

2045-2322

pii

10.1038/s41598-019-44346-5

journal_volume

9

pub_type

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