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The Effect of Nanoformulation of Amoxicillin on its Antibacterial Activity Against Common Bacterial Strains Involved in Hospital-Acquired Infections
Asma Toraji, Mahnaz Hadizadeh, Fahimeh Nemati Mansoor,
Volume 21, Issue 1 (4-2018)
Abstract
Abstract
Background: Nanotechnology offers a great chance to treat drug-resistant microbial infections. The purpose of this study was to synthesize amoxicillin-encapsulated polymeric nanoparticles and compare the antibacterial activity of this nanoformulation with pure amoxicillin.
Materials and Methods: Amoxicillin-encapsulated polymeric nanoparticles were prepared using chitosan as a polymer and alginate as cross linking agent. The obtained nanoparticles were characterized by Fourier transform infrared, dynamic light scattering and scanning electron microscopy. The antibacterial effects of the nanoparticles were evaluated using broth microdilution and well diffusion methods against some common bacterial strains involved in hospital-acquired infections.
Results: The drug-encapsulated nanoparticles were found to be spherical in shape with average size of 96 nm. These nanoparticles had a significant antibacterial effect on all tested bacteria, except for Pseudomonas aeruginosa. They also displayed stronger antibacterial activity than the nanocarrier alone or free antibiotic. The highest mean zones of growth inhibition (23.7 mm) for methicillin-sensitive Staphylococcus aureus and the smallest zone (12.5 mm) for the resistant species of this bacterium were determined. MIC of the nanoformulation against these two strains was respectively determined at 1.5 and 48 µg/ml and for Escherichia coli and Pseudomonas aeruginosa at 6.6 and 256 µg/ml.
Conclusion: The results suggest that amoxicillin encapsulation in polymer nanoparticles has the potential to increase its antibacterial activity against bacteria causing nosocomial infections.
 

The Effect of Hind Limb Immobilization on Expression of Some Genes Involved in the Regulation of Mitochondrial Processes in Soleus Muscle of Trained and Untrained Rats
Vahid Hadidi, Farhad Daryanoosh, Javad Nemati, Nader Tanideh,
Volume 22, Issue 1 (4-2019)
Abstract
Background and Aim: The purpose of this study was to determine the effect of a hind limb immobilization on the expression of PGC-1α, NRF1, Mfn2, PINK1 and Drp1 genes as the main regulators of mitochondrial quality and function in soleus muscle of endurance trained rats.
Materials and Methods: In this study, 15 male Sprague-Dawley rats were divided into three groups (control, exercise +immobilization and immobilization). The exercise + immobilization group run on the treadmill for 12 weeks and five times per week. The hind limb of the animal was immobilized for seven days with the casting method. Soleus muscle was extracted and the expression of the genes was measured by RT-PCR method. Univariate ANOVA and Tukey post hoc test were used to determine the differences (α = 0.05).
Ethical Considerations: This study with research ethics code IR.SUMS.REC.1396.S444 has been approved by research ethics committee at Shiraz university of medical sciences, Iran.
Findings: Results showed that immobilization in both immobilization and exercise +immobilization groups, compared to the  conterl group, reduced the expression of PGC-1α  gene (p = 0.001 and p = 0.045), NRF1 (p = 0.001 and p = 0.006), Mfn2 (p = 0.001, p = 0.001) and increased the expression of PINK1 (p = 0.001 and p= 0.001), but the expression of Drp1 gene didn't change significantly (p = 0.069 and p = 0.223). Also, studies showed that the expression of PGC-1α (p = 0.013), NRF1 (p = 0.001) and Mfn2 (p = 0.001) in the exercise + immobilization was lower in compare with the immobilization group. The expression of PINK1 was lower than immobilization group as well (p = 0.001).
Conclusion: This study shows that endurance training has a protective effect on mitochondrial quality during the immobilization period, but it can't prevent mitochondrial dysfunction.

Comparison of the Effect of 6 Weeks of Creatine and Ginseng Supplementation on Blood Ammonia, Lipoprotein and Homocysteine of Male Players of Iran's EPE Fencing Team in 2021
Ahmad Yaghoobi, Tahereh Bagherpoor, Nematollah Nemati,
Volume 25, Issue 3 (August & September 2022)
Abstract
Background and Aim Food and sports supplements are used by athletes all over the world, and correct and optimal consumption improves performance and prevents sports injuries. In this regard, creatine and ginseng supplements can be effective on physiological indicators and sports performance. Therefore, considering that no research has been done on the use of these supplements on blood indicators on fencers. The present study compares the effect of creatine and ginseng supplements on blood ammonia, HDL, LDL and homocysteine indices of the male players of the Iranian Epe fencing team.
Methods & Materials In the present study, 14 male players of the Epe national fencing team were divided into two creatine supplement groups (7 people) and ginseng supplement group (7 people). Subjects in two groups performed their normal exercises with the team during the research, and on the day before the measurement, after a specific activity in a sitting position, blood was taken from the arm vein of the subjects by a specialist. The statistical significance difference was determined at the level of P ≥ 0.05 and ANCOVA test was used to determine the differences between groups and the data was analyzed by SPSS software, version 25.
Ethical Considerations This article was approved by the Ethics Committee of Islamic Azad University, Shahrood Branch (Code: IR.IAU.SHAHROOD.REC.1400.073).
Results The results showed that after six weeks, there is a significant difference between the creatine and ginseng groups in the blood indices of ammonia, LDL, HDL and homocysteine (P≥0.05). so that the average of creatine supplement group in ammonia, LDL, HDL and homocysteine index in terms of mg/dL respectively (2.56±0.83, 1.16±0.33, 7.45±0.48, 8.89±0.18) and Gensing group (2.05±0.29, 1.46±0.78, 8.11±0.27, 7.63±0.45).
Conclusion The results showed that there is a significant difference in the average of blood ammonia, HDL, LDL and hemocytin between the creatine supplement group and the ginseng supplement group. Therefore, the role of ginseng supplement in reducing blood ammonia and homocysteine and in increasing HDL was more than that of creatine supplement, and the role of creatine supplement in reducing LDL was more than that of ginseng supplement. So it can be concluded that the role of ginseng supplement in the changes of blood ammonia, homocysteine and HDL is more than the role of creatine supplement.

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