Proliferation of peripheral blood mononuclear cells causes increased expression of the sodium-dependent multivitamin transporter gene and increased uptake of pantothenic acid

Janos Zempleni, J. Steven Stanley, Donald M. Mock

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

Antigenic or mitogenic stimulation of peripheral blood mononuclear cells (PBMC) causes rapid cell proliferation. PBMC proliferation is associated with increased activities of pantothenic acid-dependent metabolic pathways, suggesting increased demand for pantothenic acid. We sought to determine whether PBMC respond to proliferation by increased cellular uptake of pantothenic acid and, if so, by what mechanism(s) the increased uptake is mediated. Uptake of pantothenic acid into PBMC was mediated by the sodium-dependent multivitamin transporter, SMVT, as judged by sodium dependency of uptake, substrate affinity and specificity, and RT-PCR of PBMC RNA. Proliferating PBMC accumulated two times more [3H]pantothenic acid than quiescent PBMC. Rates of [3H]pantothenic acid uptake paralleled rates of PBMC proliferation, as judged by uptake of [3H]thymidine. The increased uptake of [3H]pantothenic acid into proliferating PBMC was mediated by increased expression of SMVT (as judged by RT-PCR using total RNA from PBMC), leading to an increased number of transporters on the cell surface (as judged by maximal transport rates for pantothenic acid). We conclude that proliferating PBMC increase expression of the gene encoding SMVT to increase uptake of pantothenic acid.

Original languageEnglish (US)
Pages (from-to)465-473
Number of pages9
JournalJournal of Nutritional Biochemistry
Volume12
Issue number8
DOIs
Publication statusPublished - Aug 29 2001

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Keywords

  • Human
  • Pantothenic acid
  • Peripheral blood mononuclear cells
  • Proliferation
  • Sodium-dependent multivitamin transporter
  • Transport

ASJC Scopus subject areas

  • Endocrinology, Diabetes and Metabolism
  • Biochemistry
  • Molecular Biology
  • Nutrition and Dietetics
  • Clinical Biochemistry

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