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Impact of the secretome of activated pancreatic stellate cells on growth and differentiation of pancreatic tumour cells.

Abstract：

:Pancreatic ductal adenocarcinoma (PDAC) exists in a complex desmoplastic microenvironment. As part of it, pancreatic stellate cells (PSCs) provide a fibrotic niche, stimulated by a dynamic communication between activated PSCs and tumour cells. Investigating how PSCs contribute to tumour development and for identifying proteins that the cells secrete during cancer progression, we studied by means of complex antibody microarrays the secretome of activated PSCs. A large number of secretome proteins were associated with cancer-related functions, such as cell apoptosis, cellular growth, proliferation and metastasis. Their effect on tumour cells could be confirmed by growing tumour cells in medium conditioned with activated PSC secretome. Analyses of the tumour cells' proteome and mRNA revealed a strong inhibition of tumour cell apoptosis, but promotion of proliferation and migration. Many cellular proteins that exhibited variations were found to be under the regulatory control of eukaryotic translation initiation factor 4E (eIF4E), whose expression was triggered in tumour cells grown in the secretome of activated PSCs. Inhibition by an eIF4E siRNA blocked the effect, inhibiting tumour cell growth in vitro. Our findings show that activated PSCs acquire a pro-inflammatory phenotype and secret proteins that stimulate pancreatic cancer growth in an eIF4E-dependent manner, providing further insight into the role of stromal cells in pancreatic carcinogenesis and cancer progression.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Marzoq AJ,Mustafa SA,Heidrich L,Hoheisel JD,Alhamdani MSS

doi

10.1038/s41598-019-41740-x

subject

Has Abstract

pub_date

2019-03-28 00:00:00

pages

5303

issue

1

issn

2045-2322

pii

10.1038/s41598-019-41740-x

journal_volume

9

pub_type

杂志文章

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