RRR-alpha-tocopheryl succinate inhibits DNA synthesis and enhances the production and secretion of biologically active transforming growth factor-beta by avian retrovirus-transformed lymphoid cells

Nutrition and Cancer
M Simmons-MenchacaK Kline

Abstract

The RRR-alpha-tocopheryl succinate form of vitamin E, referred to as vitamin E succinate (VES), inhibits the proliferation of avian reticuloendotheliosis virus-transformed RECC-UTC4-1 (C4-1) lymphoblastoid cells in a dose-dependent manner in vitro. Analyses of conditioned medium (CM) from VES growth-inhibited cells revealed a potent antiproliferative activity. Characterization of the antiproliferative activity as transforming growth factor-beta (TGF-beta) was established by 1) growth inhibition of TGF-beta-responsive Mv1Lu mink lung and murine CTLL-2 cell lines, 2) a combination of physical characteristics including heat stability, acid stability, and Bio-Gel P-60 column chromatography elution profile, 3) neutralization of the antiproliferative activity by antibodies specific for TGF-beta, and 4) immunoprecipitation of metabolically labeled TGF-beta in CM from VES-treated C4-1 cells by use of TGF-beta-specific antibodies. Northern blot analyses of total cellular RNA revealed that VES does not alter the levels of constitutively expressed TGF-beta isoform-specific mRNAs; namely, VES does not alter the levels of the 3.9- and 4.1-kb TGF-beta 2 mRNAs, the 3.0-kb TGF-beta 3 mRNA, or the 2.5-, 2.7-, and 1.7-kb TGF-beta 4 mRNAs. The da...Continue Reading

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Citations

Apr 4, 2003·Journal of the American College of Nutrition·Kedar N PrasadWilliam C Cole
Dec 29, 2005·International Journal of Cancer. Journal International Du Cancer·Mokenge P MalafaKounosuke Watabe
Nov 8, 2005·Cytokine & Growth Factor Reviews·Denis Vivien, Carine Ali
Feb 4, 2009·Clinical Cancer Research : an Official Journal of the American Association for Cancer Research·Jing NiShuyuan Yeh
Mar 1, 2006·Molecular Cancer Therapeutics·Sreenivasa DonapatyMokenge P Malafa
Jun 30, 2005·Pancreatology : Official Journal of the International Association of Pancreatology (IAP) ... [et Al.]·I HeukampF A Wenger

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