Research Article

Table of Contents | Genet. Mol. Res. 2022 (2)

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Research Article

This study aimed to examine the effects of curcumin, a phytochemical antioxidant, on the treatment and care of diabetic nephropathy and to contribute to alternative treatment strategies for diabetes. Male Wistar albino rats (8–10 weeks old) were divided into five groups of seven. Experimental diabetes was induced in all rats except for those in Group 1 (placebo group) by administration of 110 mg/kg nicotinamide, followed by intraperitoneal administration (after 15 min) of 55 mg/kg streptozotocin. Groups 1, 3, 4, and 5 were treated with 0.1 ml normal saline (0.9% NaCl), 150mg/kg/day metformin, 10 mg/kg/day glycazide (diamicron), and 200 mg/kg/day curcumin, respectively. Group 2 did not receive any treatment. Kidney tissues of rats were collected for histopathological examination.  There were no significant differences in the kidney dimensions of the rats. In the histopathological evaluation of kidney tissues with diabetic nephropathy, glomerular congestion and destruction were observed. Rats treated with curcumin had significantly less kidney damage, based on histopathological analysis, than those treated with the diabetes drugs.  We conclude that curcumin has protective effects in kidneys due to its antioxidant properties. It has potential for use, in addition to antidiabetic drugs, for diabetes treatment.

Genet. Mol. Res. 21(2): GMR19026
DOI: dx.doi.org/10.4238/gmr19026
Research Article

We investigated single nucleotide polymorphisms of four genes (calpain (CAPN-9 and CAPN-14), calpastatin – CAST, diacylglycerol acyltransferase – DGAT, and leptin - LEP) that are related to beef quality, and we examined changes in the synthesis of proteins that they encode in Nellore cattle. Samples from 95 adult males of commercial origin were analyzed. Genomic DNA was extracted from the longissimus dorsi (sirloin) muscle tissue, identified with PCR-single-stranded conformation polymorphism analysis. For each different pattern identified, the products were sent for sequencing and analyzed using sequence scanner software. The data were analyzed by determining the absolute and relative frequencies of the polymorphisms identified in each gene. For the CAPN-9 gene, sequencing showed five polymorphisms (G/A, T/A, T/C, T/C, and A/G), of which two involved amino acid substitutions (c.5861G>A and c.5498A>G). Sequencing of the CAPN-14 gene revealed four polymorphisms (A/C, G/A, T/C, and C/G), with two involving amino acid substitutions (c.11054 T>C and c.11161C>G). Sequencing of the CAST-5 gene revealed five polymorphisms (C/T, T/C, C/A, C/A, and G/T), four of which involved amino acid substitutions (c.29919C>T, c.29963A>C, c.29978C>A, and c.30019G>T). Sequencing of the DGAT gene revealed six polymorphisms (T/A, G/A, A/T, G/C, A/G, and G/A), four of which involved amino acid substitutions (c.11730A>T, c.11809G>C, c.11858A>G, and c.11927G>A). Sequencing of the LEP gene revealed three polymorphisms (C/T, C/T and T/C), with one involving an amino acid substitution (c.14962T>G). These genes   had a large number of polymorphisms resulting in amino acid differences in Nellore Cattle. These polymorphisms involving amino acid changes may promote functional changes in beef characteristics of Nellore cattle given that these genes are associated with beef quality parameters.

Genet. Mol. Res. 21(2): GMR18983
DOI: 10.4238/gmr18983