Cited by 71Telomeres, Telomerase, and SenescenceViral-associated cancers and disordersCancer-related Molecular Pathways

LMP1 of Epstein–Barr virus suppresses cellular senescence associated with the inhibition of p16INK4a expression

Yang, Xinhai, He, Zhimin, Xin, Baozhong, Cao, Liang·2000·Oncogene

Abstract

Epstein-Barr virus is associated with a number of human proliferative and malignant diseases. It is capable of immortalizing human primary B-lymphocytes in vitro. Studies indicate that latent membrane protein LMP1 is one of the viral proteins essential for this process. In this report, LMP1 was shown to prevent primary mouse embryonic fibroblasts from entering into replicative senescence in vitro. It further suppresses the senescence-associated induction of p16INK4a, commonly believed to be a key regulator of replicative senescence. In addition, LMP1 was shown to prevent premature senescence provoked by oncogenic ras in mouse embryonic fibroblasts, and to inhibit the oncogene ras-mediated induction of p16INK4a and p21WAF1. In parallel, LMP1 also prevents ras-induced premature senescence in rat embryonic fibroblasts REF52 and human diploid fibroblasts IMR90. Moreover, LMP1 is capable of suppressing the p16INK4a promoter in REF52 and Saos-2 cells in a promoter reporter assay. Our findings suggest that with the expression of p16INK4a and replicative senescence being suppressed, LMP1 may play a key role in Epstein-Barr virus-associated proliferative diseases, and it may further contribute to cancer development by preventing premature senescence induced by mitogenic oncogenes.

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Crossref · 10.1038/sj.onc.1203515

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  • EBV infection induces expression of p16INK4a or p21CIP1, which act as a primary host defence against virus propagation, and EBV-positive cells losing expression of these mediators are selected for in manifest chronic infection.

    “EBV infection has long been known to induce the expression of central signalling mediators of the senescence response such as p16INK4a or p21CIP1. These proteins act as a primary host defence against virus propagation, and EBV-positive cells losing expression of these mediators subsequently get selected for in manifest chronic infection187,188.”

    From COVID-19 and cellular senescence (2023) · cites this paper as [187]

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Authors
Yang, X., He, Z., Xin, B., & Cao, L.
Affiliations
University of Hong Kong (HK)
Venue
Oncogene
Published
2000-04-13
Volume
19
Issue
16
Pages
2002-2013
ISSN
  • 0950-9232 (ISSN-L)
  • 1476-5594
OpenAlex
W2314609747
Cited by
71
References
62
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 4 · 2021: 3 · 2020: 2 · 2019: 1 · 2016: 1 · 2015: 2 · 2014: 3 · 2013: 2 · 2012: 2
FWCI
3.67
Type
journal article
Language
en
Open access
closed
Locations
  • Oncogene (publishedVersion)
  • PubMed (publishedVersion)
Funders
Croucher Foundation
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Oncology › Viral-associated cancers and disorders
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
Epstein-Barr virus, replicative senescence, premature senescence, p16INK4a, p21, oncogenic Ras, cell immortalization, mouse embryonic fibroblasts, Saos-2 cells, carcinogenesis
MeSH terms
Animals, Cell Division, Cell Line, Cell Line, Transformed, Diploidy, Embryo, Mammalian, Female, Fibroblasts, Gene Expression Regulation, Humans, Mice, Inbred BALB C, Promoter Regions, Genetic, Genes, ras, Transfection, Viral Matrix Proteins, Cyclins, Cellular Senescence, Cyclin-Dependent Kinase Inhibitor p16, Cyclin-Dependent Kinase Inhibitor p21, Mice, Rats

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