Cited by 47Telomeres, Telomerase, and SenescenceProstate Cancer Treatment and ResearchCancer-related Molecular Pathways

Evidence that senescent human prostate epithelial cells enhance tumorigenicity: cell fusion as a potential mechanism and inhibition by p16INK4a and hTERT

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Bhatia, Bobby, Multani, Asha S., Patrawala, Lubna, Chen, Xin, Calhoun‐Davis, Tammy, Zhou, Jianjun, Schroeder, Lisa, Schneider‐Broussard, Robin +4 more·2008·International Journal of Cancer

Abstract

Normal human prostate (NHP) epithelial cells undergo senescence in vitro and in vivo but the potential role of senescent NHP cells in prostate tumorigenesis remain unclear. Here we show that senescent NHP cells enhance the in vivo tumorigenicity of low‐tumorigenic LNCaP prostate cancer and low/non‐tumorigenic subset of cells (called L cells) isolated from multiple bulk‐cultured prostate (and other) cancer cell lines. Subsequent studies suggest cell–cell fusion as a potential mechanism for senescent NHP cell‐enhanced tumor development. Using fluorescently tagged tumor cells and/or NHP cells, we find that NHP cells, like fibroblasts, can undergo fusion with unfractionated tumor cells or the L cells. Using 293T‐L cells as the model cell system, we verify NHP and 293T‐L cell fusion by using differential RT‐PCR, karyotyping, and gene expression analyses. Further experiments demonstrate that senescent NHP cells that have lost progenitor markers, accumulated p16INK4a (p16) protein expression, and acquired the AR mRNA expression, appear to be the preferential fusion targets. Strikingly, the tumorigenicity of the NHP/293T‐L hybrid cells was inhibited by exogenous p16 as well as hTERT. Chromosomal analyses revealed that hTERT probably inhibited the in vivo tumorigenicity by maintaining genomic stability. These results suggest that senescent NHP cells, like senescent fibroblasts, may promote tumor development and that one of the mechanisms underlying the senescent NHP cell‐enhanced tumorigenicity could be through cell fusion. © 2007 Wiley‐Liss, Inc.

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Authors
Bhatia, B., Multani, A. S., Patrawala, L., Chen, X., Calhoun‐Davis, T., Zhou, J., Schroeder, L., Schneider‐Broussard, R., Shen, J., Pathak, S., Chang, S., & Tang, D. G.
Affiliations
The University of Texas MD Anderson Cancer Center (US)
Corresponding author
Tang, Dean G.
Venue
International Journal of Cancer
Publisher
Wiley
Published
2008-01-25
Volume
122
Issue
7
Pages
1483-1495
ISSN
  • 0020-7136 (ISSN-L)
  • 1097-0215
OpenAlex
W2034805414
Cited by
47
References
55
Citations by year
2026: 2 · 2025: 1 · 2024: 1 · 2023: 3 · 2022: 1 · 2021: 6 · 2020: 2 · 2019: 4 · 2018: 2 · 2017: 3 · 2016: 2 · 2015: 2 · 2014: 3 · 2013: 3 · 2012: 3
FWCI
1.34
Type
journal article
Language
en
Open access
Locations
  • International Journal of Cancer (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • U.S. Department of Defense (W81XWH, W81XWH0710616)
  • Elsa U. Pardee Foundation
  • National Institutes of Health (105961, W81XWH, ES07784)
  • National Institute on Aging (R01AG023374, AG 023374)
  • National Institute of Environmental Health Sciences (ES015888, R01ES015888)
Topics
  • Health Sciences › Medicine › Physiology › Telomeres, Telomerase, and Senescence
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Prostate Cancer Treatment and Research
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
Keywords
cellular senescence, prostate epithelial cells, prostate cancer, tumorigenicity, cell fusion, p16INK4a, hTERT, genome stability, androgen receptor, LNCaP cells, hybrid cells
MeSH terms
Cell Fusion, Cell Transformation, Neoplastic, Epithelial Cells, Humans, Karyotyping, Male, Mutation, Prostate, Prostatic Neoplasms, Tumor Suppressor Protein p53, Cellular Senescence, Polymorphism, Single-Stranded Conformational, Telomerase, Cyclin-Dependent Kinase Inhibitor p16

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