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Showing 2 results for Kargar
Hosseini Fatemeh, Mohammad Kargar,
Volume 17, Issue 2 (summer 2017)
Abstract
Background & objectives: Enterococcus spp. are predominant in the faecal microflora which enter the environment directly or through wastewater. These bacteria play an important role in the development of nosocomial infections due to their ability to acquire resistance genes and their transmission to other bacteria, particularly Staphylococcus aureus. The aim of this study was to identify the prevalence of vancomycin-resistant enterococci (VRE) and to detect van A, van B and van C1/C2 genes in VRE strain isolated from environmental samples of the in southern Fars province.
Methods: This cross-sectional study was carried out on 155 Enterococcus spp isolates collected from environmental samples (hospital wastewaters and surface waters) in different areas of Larestan and Jahrom cities. Isolates were identified and confirmed as Enterococcus spp. using the membrane filtration method, selective growth on Kenner Fecal Streptococcus Agar (KF) medium and biochemical tests. The disk diffusion test and Macro Broth dilution method based on CLSI guidelines were used to determine antimicrobial susceptibility against conventional antibiotics and vancomycin and to measure the minimum inhibitory concentration (MIC), respectively. Finally, the presence of van A, van B and van C1/C2 genes in VRE strains was determined by multiplex PCR technique.
Results: Out of all of Enterococcus spp. isolates, 41 cases (26.45%) were belonged to E.faecalis, 6 cases (3.87%) to E.faecium and 108 cases (69.68%) to non-faecalis and non-faecium. In total, 46 isolates (29.67%) were resistant to vancomycin and 4 isolates showed MIC ≥128 μg/ml. Resistant to all types of antibiotics was observed in 4 isolates (8.70%). Further, 2 isolates (50%) had vanA gene and 2 isolates (50%) had vanB gene, but vanC1/C2 genes were detected in none of them.
Conclusion: The results indicated that the VRE strains are widespread in the studied area, therefore there is an urgent need for prudent use of vancomycin and implementation of control measures to prevent the environmental spread of VRE strains.
Zahra Kargar Dolatabadi, Abdossaleh Zar, Sara Zare Karizak, Rouhollah Ranjbar,
Volume 24, Issue 4 (Winter 2025)
Abstract
Background: Various signaling pathways are involved in causing hypertrophy in different organs of the body. One of these important pathways is the mTOR signaling pathway, which, as a key regulator in cellular growth and metabolism processes, plays an important role in muscle hypertrophy and kidney function. The aim of the present study was to investigate the effect of resistance training and Spirulina supplementation on the expression of IGF-1, AKT, Rheb, and TSC2 genes in male rats.
Methods: 32 male Sprague Dawley rats, 3 months old and weighing 150 ± 20 g, were randomly assigned to four groups: resistance training + spirulina supplement, resistance training, spirulina supplement, and control. Spirulina was orally administered to rats in the spirulina and resistance training plus spirulina groups at a dose of 200 mg/kg body weight per day for eight weeks. The resistance training protocol consisted of eight weeks of ladder climbing to a height of one meter. The expression levels of IGF-1, AKT, Rheb, and TSC2 were measured using Real-time PCR.
Results: The expression levels of IGF-1 (p<0.001), AKT (p<0.0001) and Rheb (p<0.0001) genes showed a significant increase in the exercise + supplement group. While the expression of TSC2 gene was significantly decreased in the exercise + supplement group (p<0.0001).
Conclusion: The findings indicate a positive effect of resistance training and Spirulina supplementation on the expression of IGF-1, AKT, Rheb, and TSC2 genes in kidney tissue.
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