Resumo

BLANCO-ROJO, R.; BAYELE, H. K.; SRAI, S. K. S.  e  VAQUERO, M. Pilar. Intronic SNP rs3811647 of the human transferrin gene modulates its expression in hepatoma cells. Nutr. Hosp. [online]. 2012, vol.27, n.6, pp.2142-2145. ISSN 1699-5198.  https://dx.doi.org/10.3305/nh.2012.27.6.6154.

Introduction: Transferrin (Tf) exerts a crucial function in the maintenance of systemic iron homeostasis. The expression of the Tf gene is controlled by transcriptional mechanism, although little is known about genetic factors influence. Objective: To study the role of rs3811647 in Tf expression using an in-vitro assay on hepatoma cells. Design and Methods: Hep3B cells were co-transfected with constructs containing A (VarA-Tf-luc) and G (VarG-Tf-luc) variants of rs3811647, using luciferase as a surrogate reporter of Tf expression. Results: Luciferase assays showed a higher intrinsic enhancer activity (p < 0.05) in the A compared with the G variant. In silico analysis of SNP rs3811647 showed that the A allele might constitute a binding site for the transcription factor glucocorticoid receptor (GR). Conclusion: The A allele of SNP rs3811647 increases Tf expression in a manner that might underlie inter-individual variation in serum transferrin levels observed in different population groups.

Palavras-chave : Transferrin gene; SNP rs3811647; Serum transferrin; Iron metabolism; Gene expression.

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