Title : Thiamin uptake by the human-derived renal epithelial (HEK-293) cells: cellular and molecular mechanisms.

Pub. Date : 2006 Oct

PMID : 16705148






4 Functional Relationships(s)
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1 Maintaining the cells in thiamin-deficient medium led to a significant (P < 0.01) and specific upregulation in [(3)H]thiamin uptake, which was associated with an increase in hTHTR-1 and hTHTR-2 protein and mRNA levels as well as promoter activities. Thiamine solute carrier family 19 member 3 Homo sapiens
2 Maintaining the cells in thiamin-deficient medium led to a significant (P < 0.01) and specific upregulation in [(3)H]thiamin uptake, which was associated with an increase in hTHTR-1 and hTHTR-2 protein and mRNA levels as well as promoter activities. Thiamine solute carrier family 19 member 3 Homo sapiens
3 These studies demonstrate for the first time that thiamin uptake by HEK-293 cells is mediated via a specific pH-dependent process, which involves both the hTHTR-1 and hTHTR-2. Thiamine solute carrier family 19 member 3 Homo sapiens
4 In addition, the uptake process appears to be under the regulation of an intracellular Ca(2+)/CaM-mediated pathway and also adaptively upregulated in thiamin deficiency via transcriptional regulatory mechanism(s) that involves both the hTHTR-1 and hTHTR-2. Thiamine solute carrier family 19 member 3 Homo sapiens