Pozol is a beverage prepared with maize dough made after boiling the kernels in limewater. This pretreatment could act as a selective force that shapes the starter microbiota, with microorganisms able to survive the fermentation. Since Streptococcus infantarius subsp.
View Article and Find Full Text PDFFlank organs are an androgen-dependent pilosebaceous complex present in male and female hamsters. These organs have been used for the evaluation of antiandrogenic drugs, which could be used for the treatment of androgen-dependent afflictions. This study demonstrated the role of four different steroidal carbamates 7-10 in the expression of mRNAs coding for different enzymes involved in the lipid metabolism in flank organs.
View Article and Find Full Text PDFBackground: The initial step of steroidal action on target cells is gene activation; therefore, the quantification of mRNA is a direct method for comparing the role of different steroids in the skin.
Objective: This study demonstrated the role of several steroids on the mRNA expression encoding for different enzymes involved in the lipid metabolism in hamsters' flank organs, which are a pilosebaceous complex.
Methods: To determine the effect of treatments with testosterone (T) progesterone (P), levonorgestrel (LNG), 17α-p-chlorobenzoyloxy-6-chloropregn-4,6-diene-3,20-dione (5) and 17α-p-chlorobenzoyloxy-4,6-pregnadiene-3,20-dione (6); T and/or LNG; T and 5 or 6; P and/or 5 or 6 on the expression of mRNA encoding for lipid enzymes, the steroids were applied to the glands; later, the mRNAs expression for the enzymes was determined by PCR.
In order to study the biological activity of the two novel steroidal carbamates derivatives: 8a and 8b, we determined the concentration of both compounds that inhibit the 50% of the activity of human prostate 5alpha-reductase enzyme, as well as the in vivo effect of these compounds in the weight of hamster prostate and flank organs diameter size. We determined also, the capacity of these steroids to bind to the androgen receptors present in the rat prostate cytosol. Furthermore the activity of these compounds on the mRNA expression of glycerol 3-phosphate acyl transferase (GPAT) in flank organs was analyzed by RT-PCR.
View Article and Find Full Text PDFIn this study, the acid resistance and the changes in outer membrane protein (Omps) profiles of Escherichia coli strains isolated from pozol, an acid-fermented maize beverage consumed in Southeastern Mexico, were determined. Results showed that adaptation to acid by these E. coli strains significantly enhances their survival in acid conditions.
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