Low-dose retinoic acid enhances in vitro invasiveness of human oral squamous-cell-carcinoma cell lines

D. Uchida, H. Kawamata, K. Nakashiro, F. Omotehara, S. Hino, M. O. Hoque, N. M. Begum, H. Yoshida, M. Sato, T. Fujimori

Research output: Contribution to journalArticlepeer-review

Abstract

Retinoids inhibit the proliferation of several types of tumour cells, and are used for patients with several malignant tumours. In this study, we examined the effect of retinoic acids (RAs) on the invasive potentials of the oral squamous cell carcinoma (SCC) cells, BHY and HNt. BHY cells expressed all of retinoid nuclear receptors (RARα, β, γ, and RXRα) and cytoplasmic retinoic acid binding proteins (CRABP1 and CRABP2). HNt cells lacked the expression of RARβ, but expressed other nuclear receptors and CRABPs. All-trans retinoic acid (ATRA) and 13-cis retinoic acid (13-cisRA) (10-6 and 10-7 M) inhibited the growth of the cells, but low-dose ATRA and 13-cisRA (10-8 M) marginally affected the growth of the cells. Surprisingly, low-dose RAs enhanced the activity of tissue-type plasminogen activator (tPA), and activated pro-matrix metalloproteinases (proMMP2 and proMMP9). Activation of proMMP2 and proMMP9 was inhibited by aprotinin, a serine-proteinase, tPA inhibitor. Furthermore, low-dose RAs enhanced the in vitro invasiveness of BHY cells. These results indicate that low-dose RAs enhances the in vitro invasiveness of oral SCC cells via an activation of proMMP2 and proMMP9 probably mediated by the induction of tPA.

Original languageEnglish (US)
Pages (from-to)122-128
Number of pages7
JournalBritish journal of cancer
Volume85
Issue number1
DOIs
StatePublished - Jul 6 2001
Externally publishedYes

Keywords

  • Invasion
  • MMP
  • Oral squamous cell carcinoma
  • Retinoic acid
  • tPA

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

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