Evaluation of the potential therapeutic role of a new generation of vitamin D analog, MART-10, in human pancreatic cancer cells in vitro and in vivo

Kun Chun Chiang, Chun Nan Yeh, Jun Te Hsu, Ta Sen Yeh, Yi Yin Jan, Chun Te Wu, Huang Yang Chen, Shyh Chuan Jwo, Masashi Takano, Atsushi Kittaka, Horng Heng Juang*, Tai C. Chen

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

40 Scopus citations

Abstract

Pancreatic cancer is a lethal disease with no known effective chemotherapy and radiotherapy, and most patients are diagnosed in the late stage, making them unsuitable for surgery. Therefore, new therapeutic strategies are urgently needed. 1α,25-dihydroxyvitamin D3 [1α,25(OH) 2D3] is known to possess antitumor actions in many cancer cells in vitro and in vivo models. However, its clinical use is hampered by hypercalcemia. In this study, we investigated the effectiveness and safety of a new generation, less calcemic analog of 1α,25(OH)2D 3, 19-nor-2α-(3-hydroxypropyl)-1α,25-dihydroxyvitamin D3 (MART-10), in BxPC-3 human pancreatic carcinoma cells in vitro and in vivo. We demonstrate that MART-10 is at least 100-fold more potent than 1α,25(OH)2D3 in inhibiting BxPC-3 cell proliferation in a time- and dose-dependent manner, accompanied by a greater upregulation of cyclin-dependent kinase inhibitors p21 and p27 and a greater downregulation of cyclin D3 and cyclin-dependent kinases 4 and 5, leading to a greater increase in the fraction of cells in G0/G1 phase. No induction of apoptosis and no effect on Cdc25 phosphatases A and C were observed in the presence of either MART- 10 or 1α,25(OH)2D3. In a xenograft mouse model, treatment with 0.3 μg/kg body weight of MART-10 twice/week for 3 weeks caused a greater suppression of BxPC-3 tumor growth than the same dose of 1α,25(OH)2D3 without inducing hypercalcemia and weight loss. In conclusion, MART-10 is a promising agent against pancreatic cancer growth. Further clinical trial is warranted.

Original languageEnglish
Pages (from-to)1316-1325
Number of pages10
JournalCell Cycle
Volume12
Issue number8
DOIs
StatePublished - 15 04 2013

Keywords

  • BxPC-3
  • Cell cycle
  • Chemotherapy
  • MART-10
  • Pancreatic cancer
  • Vitamin D analog
  • Xenograft

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