Showing 6 results for Shiri
Shirin Sheikholeslami , Seyed Mahdi Rezayat , Reza Hosseini Doust , Hamid Reza Ahmadi Ashtiani ,
Volume 10, Issue 1 (Jan,Feb 2016 2016)
Abstract
Abstract
Background and Objective: The spread of drug resistance in bacteria have prompted researchers to seek suitable alternative for antimicrobial drugs among various medicinal plants and nanoparticles. The aim of this study was to evaluate the effect of silver nanoparticles alone and in combination with methanol extract of Zataria multiflora on five Gram-positive and Gram-negative bacteria.
Methods: Different concentrations of the nanoparticles and extract alone or in combination with each other were tested against the bacteria, using well diffusion method. Three concentration levels (lowest, average and highest) were prepared form the nanoparticles and the extract for the combination, and finally nine different combinations were prepared.
Results: The extract and nanoparticles showed inhibitory effects against all the tested bacteria. The maximum diameter of growth inhibition zone in the presence of the extract and nanoparticles were observed in Streptococcus pyogenes (35.6mm) and methicillin-resistant Staphylococcus aureus (20.6mm), respectively. The maximum diameter of growth inhibition zone for the combination was measured in S. pyogenes (31mm).
Conclusion: The combination of low concentrations of the plant extract and nanoparticles are more effective against bacteria, but the combination of their high concentrations reduce the antibacterial effects in some cases.
Keyvan Roshanjo, Leila Asadpour , Mohammad Reza Shiri Shahsavar, Arash Hemmati,
Volume 11, Issue 2 (Mar-Apr 2017)
Abstract
ABSTRACT
Background and Objective: Campylobacters are infectious zoonotic agents, and among the main bacterial causes of gastroenteritis in humans. Studies have shown that Campylobacter jejuni is of the main causes of infection among humans. Detection of these infectious agents in water resources is of great importance for maintaining the health of humans. Therefore, the aim of this study was molecular detection of C. jejuni strains in surface water samples collected from Rasht, Iran.
Methods: This cross-sectional descriptive study was performed on 45 surface water samples collected from the city of Rasht. After culture and isolation of bacteria, the molecular detection of C. jejuni was carried out using hipO-specific primers. Presence of cytolethal distending toxin (cdt) gene in positive samples was evaluated by polymerase chain reaction using cdtC-specific primers.
Results: Of 45 samples, seven (15.5%) were positive for C. jejuni contamination, five of which (71.4%) had the cdtC gene.
Conclusion: The prevalence of toxin-producing C. jejuni in surface waters of Rasht is notable. Therefore, it is recommended to take necessary measures for controlling the spread of this microorganism.
Keywords: Campylobacter jejuni, Surface water, cdt gene, PCR.
Amir Taghipoor Asramy , Abbas Ghanbari-Niaki , Shirin Hakemi , Mehran Naghizadeh Qomi , Mohammad Mehdi Moghanny Bashi ,
Volume 12, Issue 1 (Jan-Feb 2018)
Abstract
ABSTRACT
Background and Objectives: The aim of this study was to evaluate the effect of 12 weeks of intense endurance training and bee pollen consumption on
ABCA1 gene expression in small intestine, liver and gastrocnemius muscle tissues of male rats.
Methods: In this study, 24 male Wistar rats (aged 6-8 weeks and weighing 90-110 g) were randomly divided into four groups of saline-control (n=6), saline-training (n=6), bee pollen-control (n=6) and bee pollen-training (n=6). The training groups exercised on a treadmill for 12 weeks (30 m/min, 90 min/day, five days/week). The bee pollen groups were given bee pollen orally (500 mg/Kg) for 12 weeks. Data were analyzed using two-way ANOVA at significance level of 0.05.
Results: ABCA1 gene expression was highest in the liver, gastrocnemius muscle and small intestine, respectively. The findings also revealed that the intense endurance training caused a non-significant increase in
ABCA1 gene expression in the small intestine and liver. However, the training caused a non-significant decrease in
ABCA1 gene expression in the gastrocnemius muscle. In addition, consumption of bee pollen significantly increased
ABCA1 gene expression in the small intestine and gastrocnemius muscle of male rats. However, the effect of bee pollen on the gene’s expression in the liver was not statistically significant.
Conclusion: Based on our findings, it can be concluded that consumption of bee pollen has more beneficial effects on the
ABCA1 gene expression and reverse cholesterol transport compared with the intense endurance training.
Keywords: ABCA1
protein, Pollen, exercise.
Maryam Lotfi, Mohammad Azizi, Worya Tahmasebi, Parviz Bashiri,
Volume 14, Issue 2 (Mar-Apr 2020)
Abstract
ABSTRACT
Background and Objective: It is desirable for athletes, especially female soccer players, to consume beetroot beverage during training as a way of improving both health and performance ,. Therefore, the objective of this study was to assess the effect of beetroot juice intake on lipid profile in female soccer players.
Methods: Young and well-trained female soccer players (N=20) were included in a randomized placebo-controlled crossover study. They were categorized into two groups: experimental (beetroot beverage, n=10, age: 23.20±0.91 years, BMI: 22.57±1.54(kg/m2)) and control (placebo, n=10, age: 23±0.81 years, BMI: 23.13±0.58(kg/m2)). Subjects drank either 200 ml concentrated beetroot beverage or an equal amount of placebo 2 hours prior to their trainings for six weeks (18 session). Blood samples were taken 24 hours before and after trials. All data were compared in pretest and posttest via paired sample t-test and independent sample t-test. All statistical analyses were performed at (P≤0.05) by SPSS (version22).
Results: Beetroot juice intake increased plasma high density lipoprotein (t= -60.88, P<0.05). Triglyceride, total cholesterol, and low density lipoprotein were reduced (P<0.05). Compared with placebo, beetroot juice reduced the concentrations of triglyceride, total cholesterol, and low density lipoprotein (P<0.05).
Conclusion: Regular beetroot juice intake has significant effects on lipid profile in female soccer players, hence its suggestion for preventing diseases such as hypercholesterolemia and hypertension in female soccer players.
Key words: Soccer, Training, Dietary Supplements, Lipids.
Mohammad Fallah, Alireza Shiri, Amir Hossein Maghsood, Mohammad Matini,
Volume 15, Issue 3 (May-Jun 2021)
Abstract
Background and objectives: Hydatidosis is an important zoonotic disease with widespread distribution. For unknown reasons, some cysts are unable to produce protoscoleces, and little is known about the mechanisms involved in infertile cyst production. Therefore, characterization of hydatid cyst fluid (HCF) components could help clarify the host-parasite relationship and the fertility process of cyst. The aim of this study was to identify and quantify biochemical components of HCF of fertile and infertile cysts from different hosts.
Methods: A total of 35 HCF samples were obtained from the liver and lung of 16 cattle, 16 sheep and three humans. Fertility of cysts was determined by examination of cysts’ content. Then, total fluid was aspirated aseptically from each cyst. The samples were centrifuged at 10000×g for 15 min at 4°C, and then concentrated and dialyzed against phosphate buffer saline using an Amicon Ultra-15 5000 MWCO centrifugal filter device (Millipore, USA). All biochemical components were quantified by an automatic analyzer.
Results: The value of lactate dehydrogenase, potassium, calcium, cholesterol, glucose, urea and uric acid differed significantly in cysts collected from different hosts (P<0.001). There was also a significant difference in the amount of lactate dehydrogenase, aspartate aminotransferase and cholesterol between fertile and infertile cysts (P<0.039).
Conclusion: Due to the differences in biochemical composition of HCF of different host origin, it is possible that the host plays a crucial role in determining the type of biochemistry in hydatid cyst as well as in hydatid cyst fertility.
Shahab Shiri Hamedani, Mohsen Mansouri, Sina Shiri Hamedani, Parham Tadayon, Peyman Aslani, Mohammad Mohsen Homayouni,
Volume 16, Issue 4 (Jul-Aug 2022)
Abstract
Background and objectives: Echinococcosis is a global cosmopolitan zoonotic disease and a major veterinary and public health issue. In humans, echinococcosis usually develops following close contact with infected dogs or ingestion of the parasite eggs. Until now, no effective vaccine has been commercially developed, and treatment is only focused on controlling hydatidosis. This study was conducted to evaluate the protoscolicidal activity of alcoholic extracts of pomegranate rind and barberry.
Methods: The alcoholic extracts of pomegranate rind and barberry were prepared by mixing 330 g of powdered plants with 1,000 ml of 70% ethanol. A concentrate of viable protoscolices (PCSs) was obtained from hydatid cysts found in the lungs and liver of sheep. Next, PCSs were treated with four different concentrations (5, 10, 20, 30, and mg/ml) of each extract for 10, 20, 30, and 60 minutes. The eosin exclusion test was performed to assess viability of the PCSs.
Results: The mortality rate caused by treatment with the extracts ranged between 25% and 100%. Complete inactivation of PCSs was achieved after 60 minutes of exposure to 15 mg/ml of the pomegranate rind extract and 30 mg/ml of the barberry extract.
Conclusion: Given their favorable anti-PCSs activity, combination of conventional synthetic albendazole with the alcoholic extracts of pomegranate rind and barberry might induce higher anti-PCS activity with lower side effects. It is recommended to evaluate the anti-PCSs activities of the pomegranate rind and barberry alcoholic extracts in vivo and ex vivo.
