BACKGROUND & AIMS: Effective chemotherapy for pancreatic cancer is urgently needed. The aim of this study was to compare the anti-proliferative activity of a new vitamin D3 analogue, 22-oxa-1,25-dihydroxyvitamin D3 (22-oxa-calcitriol), on pancreatic cancer cells lines with that of 1,25-dihydroxyvitamin D3 (calcitriol) with analysis of vitamin D receptor status. METHODS: Antiproliferative effects of both agents were compared using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method and by measuring the tumor size of xenograft inoculated into athymic mice. Vitamin D receptor contents by Scatchard analysis and mutational analysis of receptor complementary DNA were performed. RESULTS: In vitro, 22-oxa-calcitriol and calcitriol markedly inhibited the proliferation (3 of 9 cell lines) and caused a G1 phase cell cycle arrest by appearance of numerous domes. In vivo, 22-oxa-calcitriol inhibited the growth of BxPC-3 xenografts more significantly than calcitriol without including hypercalcemia. Hs 766T, showing no response to either agent, had the second highest receptor contents with no abnormalities in its primary structure deduced by receptor complementary DNA. CONCLUSIONS: 22-oxa-calcitriol may provide a more useful tool for the chemotherapy of pancreatic cancer than calcitriol. Also, the susceptibility of the cell lines to both agents is not well determined by evaluating either the contents or the mutation of vitamin D receptor.
BACKGROUND & AIMS: Effective chemotherapy for pancreatic cancer is urgently needed. The aim of this study was to compare the anti-proliferative activity of a new vitamin D3 analogue, 22-oxa-1,25-dihydroxyvitamin D3 (22-oxa-calcitriol), on pancreatic cancer cells lines with that of 1,25-dihydroxyvitamin D3 (calcitriol) with analysis of vitamin D receptor status. METHODS: Antiproliferative effects of both agents were compared using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide method and by measuring the tumor size of xenograft inoculated into athymic mice. Vitamin D receptor contents by Scatchard analysis and mutational analysis of receptor complementary DNA were performed. RESULTS: In vitro, 22-oxa-calcitriol and calcitriol markedly inhibited the proliferation (3 of 9 cell lines) and caused a G1 phase cell cycle arrest by appearance of numerous domes. In vivo, 22-oxa-calcitriol inhibited the growth of BxPC-3 xenografts more significantly than calcitriol without including hypercalcemia. Hs 766T, showing no response to either agent, had the second highest receptor contents with no abnormalities in its primary structure deduced by receptor complementary DNA. CONCLUSIONS:22-oxa-calcitriol may provide a more useful tool for the chemotherapy of pancreatic cancer than calcitriol. Also, the susceptibility of the cell lines to both agents is not well determined by evaluating either the contents or the mutation of vitamin D receptor.
Authors: Chen Yuan; Zhi Rong Qian; Ana Babic; Vicente Morales-Oyarvide; Douglas A Rubinson; Peter Kraft; Kimmie Ng; Ying Bao; Edward L Giovannucci; Shuji Ogino; Meir J Stampfer; John Michael Gaziano; Howard D Sesso; Julie E Buring; Barbara B Cochrane; Rowan T Chlebowski; Linda G Snetselaar; JoAnn E Manson; Charles S Fuchs; Brian M Wolpin Journal: J Clin Oncol Date: 2016-06-20 Impact factor: 44.544
Authors: Katherine Van Loon; Kouros Owzar; Chen Jiang; Hedy L Kindler; Mary F Mulcahy; Donna Niedzwiecki; Eileen M O'Reilly; Charles Fuchs; Federico Innocenti; Alan P Venook Journal: J Natl Cancer Inst Date: 2014-08-06 Impact factor: 13.506
Authors: Rachael Z Stolzenberg-Solomon; Eric J Jacobs; Alan A Arslan; Dai Qi; Alpa V Patel; Kathy J Helzlsouer; Stephanie J Weinstein; Marjorie L McCullough; Mark P Purdue; Xiao-Ou Shu; Kirk Snyder; Jarmo Virtamo; Lynn R Wilkins; Kai Yu; Anne Zeleniuch-Jacquotte; Wei Zheng; Demetrius Albanes; Qiuyin Cai; Chinonye Harvey; Richard Hayes; Sandra Clipp; Ronald L Horst; Lonn Irish; Karen Koenig; Loic Le Marchand; Laurence N Kolonel Journal: Am J Epidemiol Date: 2010-06-18 Impact factor: 4.897