Biotin homeostasis during the cell cycle

J. Zempleni, D. M. Mock

Research output: Contribution to journalReview articlepeer-review

7 Scopus citations

Abstract

Peripheral blood mononuclear cells (PBMC) accumulate biotin by a Na-dependent energy-requiring transporter. This transporter might be the so-called Na-dependent multivitamin transporter, but kinetic observations suggest the existence of a second, more specific, biotin transporter. PBMC respond to proliferation by increased uptake of biotin; the increase is probably mediated by an increased number of transporters on the cell surface. The inferred increase in the biotin transporter synthesis is relatively specific. The increased uptake of biotin into proliferating PBMC is consistent with the hypothesis that these cells have an increased demand for biotin. Indeed, proliferating PBMC increase expression of genes encoding β-methylcrotonyl-CoA carboxylase and propionyl-CoA carboxylase, generating a quantitatively significant increased demand for biotin as a coenzyme in newly-synthesized carboxylases. Moreover, expression of the holocarboxylase synthetase gene increases, consistent with the synthesis of new holocarboxylases. In addition, proliferating PBMC increase both the density of biotinylation of histones and the mass of biotinylated histones per cell, suggesting a potential role for biotin in transcription and replication of DNA.

Original languageEnglish (US)
Pages (from-to)45-63
Number of pages19
JournalNutrition Research Reviews
Volume14
Issue number1
DOIs
StatePublished - 2001

Keywords

  • Biotin
  • Cell cycle
  • Na-dependent multivitamin transporter
  • Peripheral blood mononuclear cells

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Nutrition and Dietetics

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