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 Repjournal_title
Scientific reportsauthors
Kretschmer A,Zhang F,Somasekharan SP,Tse C,Leachman L,Gleave A,Li B,Asmaro I,Huang T,Kotula L,Sorensen PH,Gleave MEdoi
10.1038/s41598-019-44346-5subject
Has Abstractpub_date
2019-05-24 00:00:00pages
7826issue
1issn
2045-2322pii
10.1038/s41598-019-44346-5journal_volume
9pub_type
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