当前位置： SCI文献检索 > BRITISH JOURNAL OF CANCER期刊下所有文献 > KSHV infection skews macrophage polarisation towards M2-like/TAM and activates Ire1 α-XBP1 axis up-regulating pro-tumorigenic cytokine release and PD-L1 expression.

KSHV infection skews macrophage polarisation towards M2-like/TAM and activates Ire1 α-XBP1 axis up-regulating pro-tumorigenic cytokine release and PD-L1 expression.

Abstract：

BACKGROUND:Kaposi's Sarcoma Herpesvirus (KSHV) is a gammaherpesvirus strongly linked to human cancer. The virus is also able to induce immune suppression, effect that contributes to onset/progression of the viral-associated malignancies. As KSHV may infect macrophages and these cells abundantly infiltrate Kaposi's sarcoma lesions, in this study we investigated whether KSHV-infection could affect macrophage polarisation to promote tumorigenesis. METHODS:FACS analysis was used to detect macrophage markers and PD-L1 expression. KSHV infection and the molecular pathways activated were investigated by western blot analysis and by qRT-PCR while cytokine release was assessed by Multi-analyte Kit. RESULTS:We found that KSHV infection reduced macrophage survival and skewed their polarisation towards M2 like/TAM cells, based on the expression of CD163, on the activation of STAT3 and STAT6 pathways and the release of pro-tumorigenic cytokines such as IL-10, VEGF, IL-6 and IL-8. We also found that KSHV triggered Ire1 α-XBP1 axis activation in infected macrophages to increase the release of pro-tumorigenic cytokines and to up-regulate PD-L1 surface expression. CONCLUSIONS:The findings that KSHV infection of macrophages skews their polarisation towards M2/TAM and that activate Ire1 α-XBP1 to increase the release of pro-tumorigenic cytokines and the expression of PD-L1, suggest that manipulation of UPR could be exploited to prevent or improve the treatment of KSHV-associated malignancies.

journal_name

Br J Cancer

journal_title

British journal of cancer

authors

Gilardini Montani MS,Falcinelli L,Santarelli R,Granato M,Romeo MA,Cecere N,Gonnella R,D'Orazi G,Faggioni A,Cirone M

doi

10.1038/s41416-020-0872-0

subject

Has Abstract

pub_date

2020-07-01 00:00:00

pages

298-306

issue

2

eissn

0007-0920

issn

1532-1827

pii

10.1038/s41416-020-0872-0

journal_volume

123

pub_type

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