Nuclear factor-kappaB p65 mediates tumor necrosis factor alpha-induced nuclear translocation of telomerase reverse transcriptase protein - PubMed (original) (raw)
. 2003 Jan 1;63(1):18-21.
Affiliations
- PMID: 12517770
Nuclear factor-kappaB p65 mediates tumor necrosis factor alpha-induced nuclear translocation of telomerase reverse transcriptase protein
Masaharu Akiyama et al. Cancer Res. 2003.
Retraction in
- Retraction: Nuclear Factor-κB p65 Mediates Tumor Necrosis Factor α-induced Nuclear Translocation of Telomerase Reverse Transcriptase Protein.
Akiyama M, Hideshima T, Hayashi T, Tai YT, Mitsiades CS, Mitsiades N, Chauhan D, Richardson P, Munshi NC, Anderson KC. Akiyama M, et al. Cancer Res. 2024 Mar 15;84(6):939. doi: 10.1158/0008-5472.CAN-24-0517. Cancer Res. 2024. PMID: 38486487 No abstract available.
Abstract
Sustained proliferation of cancer cells requires telomerase to maintain telomeres that regulate chromosomal stability and cellular mitosis. Expression of human telomerase reverse transcriptase (hTERT) catalytic subunit, which modulates telomerase activity, is regulated at both the transcriptional level and via phosphorylation by Akt kinase. Moreover, nuclear localization of hTERT is required to promote elongation of telomere sequences. In this study, we show for the first time that hTERT protein interacts directly with nuclear factor (NF)-kappaB p65 in MM.1S cells. Importantly, tumor necrosis factor alpha (TNFalpha) modulates telomerase activity by inducing translocation from the cytoplasm to the nucleus of hTERT protein bound to NF-kappaB p65. Conversely, a specific IkappaB kinase (IKK) inhibitor PS-1145, and a specific NF-kappaB nuclear translocation inhibitor SN-50, both block TNFalpha-induced hTERT nuclear translocation. These studies suggest that NF-kappaB p65 plays a pivotal role in regulating telomerase by modulating its nuclear translocation.
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