Abstract:
:There have been no reports describing the effects of cancer cell-derived extracellular vesicles (EVs) on three-dimensional organoids. In this study, we delineated the proneoplastic effects of esophageal adenocarcinoma (EAC)-derived EVs on gastric organoids (gastroids) and elucidated molecular mechanisms underlying these effects. EVs were identified using PKH-67 staining. Morphologic changes, Ki-67 immunochemistry, cell viability, growth rates, and expression levels of miR-25 and miR-210, as well as of their target mRNAs, were determined in gastroids co-cultured with EAC-derived extracellular vesicles (c-EVs). C-EVs were efficiently taken up by gastroids. Notably, c-EV-treated gastroids were more crowded, compact, and multilayered and contained smaller lumens than did those cultured in organoid medium alone or in EAC-conditioned medium that had been depleted of EVs. Moreover, c-EV-treated gastroids manifested increased proliferation and cellular viability relative to medium-only or EV-depleted controls. Expression levels of miR-25 and miR-210 were significantly higher, and those of PTEN and AIFM3 significantly lower, in c-EV-treated versus medium-only or EV-depleted control groups. Inhibitors of miR-25 and miR-210 reversed the increased cell proliferation induced by c-exosomes in co-cultured gastroids by lowering miR-25 and miR-210 levels. In conclusion, we have constructed a novel model system featuring the co-culture of c-EVs with three-dimensional gastroids. Using this model, we discovered that cancer-derived EVs induce a neoplastic phenotype in gastroids. These changes are due, at least in part, to EV transfer of miR-25 and miR-210.
journal_name
Neoplasiajournal_title
Neoplasia (New York, N.Y.)authors
Ke X,Yan R,Sun Z,Cheng Y,Meltzer A,Lu N,Shu X,Wang Z,Huang B,Liu X,Wang Z,Song JH,Ng CK,Ibrahim S,Abraham JM,Shin EJ,He S,Meltzer SJdoi
10.1016/j.neo.2017.06.007subject
Has Abstractpub_date
2017-11-01 00:00:00pages
941-949issue
11eissn
1522-8002issn
1476-5586pii
S1476-5586(17)30240-3journal_volume
19pub_type
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