Medical College of Wisconsin
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Polarized expression of members of the solute carrier SLC19A gene family of water-soluble multivitamin transporters: implications for physiological function. Biochem J 2003 Nov 15;376(Pt 1):43-8 PMID: 14602044 PMCID: PMC1223768


Humans lack biochemical pathways for the synthesis of the micro-nutrients thiamine and folate. Cellular requirements are met through membrane transport activity, which is mediated by proteins of the SLC19A gene family. By using live-cell confocal imaging methods to resolve the localization of all SLC19A family members, we show that the two human thiamine transporters are differentially targeted in polarized cells, establishing a vectorial transport system. Such polarization decreases functional redundancy between transporter isoforms and allows for independent regulation of thiamine import and export pathways in cells.

Author List

Boulware MJ, Subramanian VS, Said HM, Marchant JS


Jonathan S. Marchant PhD Chair, Professor in the Cell Biology, Neurobiology and Anatomy department at Medical College of Wisconsin

MESH terms used to index this publication - Major topics in bold

Biological Transport
Cell Line
Cell Polarity
Folic Acid
Membrane Transport Proteins
Microscopy, Confocal

View this publication's entry at the Pubmed website PMID: 14602044
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