Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Tytuł pozycji:

Hypoxic stress suppresses lung tumor-secreted exosomal miR101 to activate macrophages and induce inflammation

Tytuł:
Hypoxic stress suppresses lung tumor-secreted exosomal miR101 to activate macrophages and induce inflammation
Autorzy:
Jie Li
Peng Xu
Di Wu
Minjie Guan
Xuanwen Weng
Yongzhen Lu
Yuwei Zeng
Rongchang Chen
Temat:
Cytology
QH573-671
Źródło:
Cell Death and Disease, Vol 12, Iss 8, Pp 1-11 (2021)
Wydawca:
Nature Publishing Group, 2021.
Rok publikacji:
2021
Kolekcja:
LCC:Cytology
Typ dokumentu:
article
Opis pliku:
electronic resource
Język:
English
ISSN:
2041-4889
Relacje:
https://doaj.org/toc/2041-4889
DOI:
10.1038/s41419-021-04030-x
Dostęp URL:
https://doaj.org/article/1fed53385f934f7d92664f2723cece1c  Link otwiera się w nowym oknie
Numer akcesji:
edsdoj.1fed53385f934f7d92664f2723cece1c
Czasopismo naukowe
Abstract Hypoxia promotes inflammation in the tumor microenvironment. Although hypoxia-inducible factor 1α (HIF1α) is a master modulator of the response to hypoxia, the exact mechanisms through which HIF1α regulates the induction of inflammation remain largely unclear. Using The Cancer Genome Atlas Lung Squamous Cell Carcinoma (TCGA-LUSC) database, we divided patients with LUSC into two groups based on low or high HIF1α expression. After analyzing the differentially expressed genes in these two groups, we found that HIF1α was positively correlated with interleukin 1A (IL1A) and IL6 expression. Our in vitro study showed that hypoxic stress did not induce IL1A or IL6 expression in tumor cells or macrophages but dramatically enhanced their expression when co-cultured with tumor cells. We then investigated the effect of tumor-derived exosomes on macrophages. Our data suggested that the changes in miR101 in the tumor-derived exosomes played an important role in IL1A and IL6 expression in macrophages, although the hypoxic stress did not change the total amount of exosome secretion. The expression of miR101 in exosomes was suppressed by hypoxic stress, since depletion of HIF1α in tumor cells recovered the miR101 expression in both tumor cells and exosomes. In vitro, miRNA101 overexpression or uptake enriched exosomes by macrophages suppressed their reprogramming into a pro-inflammatory state by targeting CDK8. Injection of miR101 into xenografted tumors resulted in the suppression of tumor growth and macrophage tumor infiltration in vivo. Collectively, this study suggests that the HIF1α-dependent suppression of exosome miR101 from hypoxic tumor cells activates macrophages to induce inflammation in the tumor microenvironment.

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies