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HIF1α enrichment on KSHV genome in normoxia and hypoxia

ABSTRACT: Chromatin Immuno-precipitaion sequencing was performed using HIF1 alpha antibodies to investigate its enrichment on Kaposi's sarcoma associated herpesvirus (KSHV) genome in BC3 cells and purified KSHV infected PBMCs under normoxic or hypoxic conditions

ORGANISM(S): Homo sapiens

PROVIDER: GSE149401 | GEO | 2020/11/01

REPOSITORIES: GEO

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Epigenetic reprogramming of Kaposi’s sarcoma-associated herpesvirus during hypoxic reactivation

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Project description:The aging process is characterized by cellular functional decline and increased susceptibility to infections. Understanding the association between virus infection and aging is crucial for developing effective strategies against viral infections in older individuals. Kaposi's sarcoma-associated herpesvirus (KSHV) infection increases the risk of Kaposi's sarcoma, a vascular cancer prevalent among the elderly without HIV infection. However, the relationship between KSHV pathogenesis and cellular senescence remains unknown. Here, we demonstrate that KSHV infectivity is significantly increased in senescent human endothelial cells due to enhanced binding of virions to cell surface. Proteomic analysis identified caveolin-1 and CD109 that promote KSHV infection and were significantly upregulated in senescent cells. In particular, CD109 is expressed on cell surface and directly interacts with KSHV virions to enhance KSHV infection. Knockout of CD109 abolished while overexpression of CD109 promote KSHV binding to cell surface, and infectivity. These results identify CD109 as a novel KSHV entry receptor that enhances KSHV infection in senescent cells, which might in part explain the higher sensitivity of elder subjects to KSHV infection and Kaposi's sarcoma.

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