Efecto del extracto de maíz morado sobre la expresión génica de srebp-1, A5d y A6d en glándula mamaria de ratas nodrizas suplementadas con aceite de chía (Salvia Hispánica L) / Effect of purple corn extract on gene expression of srebp-1, A5d y A6d in mammary gland of nursing rats supplemented with chia oil (Salvia Hispánica L)

The effect of the dietary intake of purple-corn extract (EMM) as a source of anthocyanins and the oral supplementation of chia oil (CH), rich in α-linolenic acid on the lipid metabolism of the mammary glands were evaluated by gene expression SREBP-1, Δ6D Δ5D in 36 nursing rats distributed in olive oil (OL), chia oil (CH), olive oil - EMM (EMM OL +) or chia oil - EMM (CH + EMM) treatments. Gene expression of SREBP-1 was similar in OL and CH, increasing in presence of EMM; suggesting that under this conditions, CH and OL oils have similar effect on SREBP-1, while anthocyanins upregulate the gene expression. ALA inhibited the expression of desaturases, and the anthocyanins imaaproved Δ5D expression at control levels similar or higher in the case of Δ6D.

Se evaluó el efecto dietario de un extracto de maíz morado (EMM) como fuente de antocianinas y la suplementación oral de aceite de chía (CH), rico en ácido α-linolénico sobre la expresión génica de SREBP-1, Δ5D y Δ6D en en glándula mamaria de 36 ratas nodrizas distribuidas en cuatro tratamientos: aceites de oliva (OL), CH, OL + EMM o CH + EMM. La expresión de SREBP-1 fue similar en OL y CH, incrementándose en presencia de EMM. La expresión de Δ5D y Δ6D fue mayor en OL que en CH, donde incrementó en presencia de EMM, sugiriendo que bajo estas condiciones los aceites CH y OL tienen efectos similares sobre la expresión de SREBP-1 mientras las antocianinas regulan al alza dicha expresión. ALA inhibió la expresión de las desaturasas y la presencia de antocianinas aumentó la de Δ5D a niveles similares al control, o superiores en el caso de Δ6D.

Effect of curcumin on sterol regulatory report system in HEK-293 / 中国药理学通报

Aim To investigate the lipid-lowering mechanism of Chinese Medicine curcumin.A sterol regulatory report system of LDLR gene expression in HEK-293 cell line was established.Method A green fluorescent protein(GFP) gene was constructed downstream of the sterol regulatory element-1(SRE-1) and the constructed plasmid was introduced into HEK-293 cell line.This SRE-GFP transfected 293 cells were treated with different concentration of curcumin for 2 days.The expression of GFP in the cells was measured by a fluorescence microscope and Flow Cytometry.Results The expression of GFP in SRE-GFP transfected 293 cells was obviously induced by curcumin.Conclusion Curcumin may positively affect the expression of LDLR gene by its influence on SRE-1.