Effects of okadaic acid and vanadate on TPA-induced monocytic differentiation in human promyelocytic leukemia cell line HL-60

Lillian Wei, Yat Ming Yung

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)


Treatment of HL-60 cells with 12-O-tetradecanoylphorbol-13-acetate (TPA) (1-5 nM) induced inhibition of cell growth and the appearance of an adherent monocyte-like cell type in a dose- and time-dependent manner. The extent of TPA-induced monocytic differentiation was found to be markedly reduced by okadaic acid (OA) (35 nM). OA had to be present for the early 12 h during treatment with TPA to reduce the induction of monocytic differentiation. The majority of cells (80%) were non-adherent but morphologically resembled mature myelocytes or granulocytes after treatment with TPA (5 nM) in the presence of OA (35 nM). Vanadate (VD), on the other hand, enhanced the extent of monocytic differentiation induced by low-dose of TPA (1 nM). These results indicated that dephosphorylation by tyrosine protein phosphatase and serine-threonine protein phosphatase may play an important role in the induction of monocytic and granulocytic differentiation.
Original languageEnglish
Pages (from-to)199-205
Number of pages7
JournalCancer Letters
Issue number2
Publication statusPublished - 14 Apr 1995
Externally publishedYes


  • Okadaic acid
  • TPA-induced differentiation
  • Vanadate

ASJC Scopus subject areas

  • Oncology
  • Cancer Research

Cite this