Roles for MicroRNAs, miR-93 and miR-130b, and tumor protein 53-induced nuclear protein 1 tumor suppressor in cell growth dysregulation by human T-cell lymphotrophic virus 1

Lung Yeung Man, Jun Ichirou Yasunaga, Yamina Bennasser, Nelson Dusetti, David Harris, Nafees Ahmad, Masao Matsuoka, Kuan Teh Jeang

Research output: Contribution to journalArticle

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Abstract

A role for microRNAs (miRNA) in human T-cell leukemia virus 1 (HTLV-1)-mediated cellular transformation has not been described. Here,we profiled miRNA expression in HTLV-1-transformed human T-cell lines and primary peripheral blood mononuclear cells from adult T-cell leukemia patients. Analyses of 11 different profiles revealed six miRNAs that were consistently up-regulated. Two of the up-regulated miRNAs (miR-93 and miR-130b) target the 3′ untranslated region (3′UTR) of the mRNA for a tumor suppressor protein, tumor protein 53-induced nuclear protein 1 (TP53INP1). A low expression level of TP53INP1 protein was found in HTLV-1-transformed cells. Additionally,when antagomirs were used to knock down miR-93 and miR-130b in these cells, the expression of TP53INP1 was increased, suggesting that the latter is regulated inside cells by the former. A role for TP53INP1 in regulating cell growth was established by experiments that showed that enhanced TP53INP1 expression increased apoptosis. Collectively,the findings implicate a miR-93/miR-130b-TP53INP1 axis that affects the proliferation and survival of HTLV-1-infected/transformed cells.

Original languageEnglish (US)
Pages (from-to)8976-8985
Number of pages10
JournalCancer Research
Volume68
Issue number21
DOIs
StatePublished - Nov 1 2008

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ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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