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Identification of polymorphism in promoter region of growth hormone receptor (GHR) gene and its association with milk related traits in Holstein cows

It is widely accepted that hormones, growth factors and other agents exert their biological effects on target tissues by binding to specific receptors on the plasma membrane. The variability in constituent sequences of growth hormone receptor (GHR) gene is very important because of its major role in mammary gland development. The aim of the present study is to detect polymorphism in promoter region of GHR gene and its association with milk related traits in Holstein cows. Blood samples were randomly collected from 93 Holstein cows, transported to the laboratory and stored at -20°C for further analysis. DNA was extracted using modified salting-out method and a fragment of 836 base pair from promoter region of GHR gene was amplified by a specific primer pairs using polymerase chain reaction (PCR). The PCR products were digested by AluI restriction enzyme and electrophoresed on 2% agarose gel. Result of enzyme digestion for GHR gene, showed allele AluI(-) with the fragment sizes of 14, 75 and 747, and allele AluI(+) with the fragment sizes of 14, 75, 145 and 602 base pairs. Frequency estimation of AluI(-) and AluI(+) alleles were 56 and 44%, respectively, and mean of heterozygosity was 0.49. Statistical analysis showed that cows with AluI(+) allele had significantly higher milk protein and fat percentage at first lactation compared with cows with AluI(-/-), while there was no significant relation between different genotypes and other traits.Keywords: Growth hormone receptor, polymorphism, milk, HolsteinAfrican Journal of Biotechnology Vol. 9(33), pp. 5460-5464, 16 August, 201

Molecular identification of Pseudomonas aeruginosa recovered from cystic fibrosis patients

Objective. Precise identification of various morphotypes of Pseduomonas aeruginosa which developed during cystic fibrosis (CF) is of prime importance. We aimed to identify the isolates of P. aeruginosa recovered from CF patients at the genus and species level through primers targeting oprI and oprL genes via PCR. Methods. Sputum samples or throat swabs were taken from 100 CF patients and plated on cetrimide agar. All suspected colonies were primarily screened for P. aeruginosa by a combination of phenotypic tests. Molecular identification of colonies was per- formed using specific primers for oprI and oprL genes.Results. Based on phenotypic tests, P. aeruginosa isolates were recovered from 40% of CF patients. Forty isolates yielded ampli- con of oprI gene using genus-specific primers confirming the identity of fluorescent pseudomonads. However, 37 of 40 isolates yielded amplicon of oprL gene using species-specific primers, verifying the identity of P. aeruginosa. Conclusion. This study showed that the species-specific PCR tar- geting oprL gene can be used as accurate test for identification of highly adaptable P. aeruginosa in CF patients. This procedure may provide a simple and reliable method for identification of various morphotypes

Status of HIV and hepatitis C virus infections among prisoners in the Middle East and North Africa: review and synthesis.

INTRODUCTION: The status of HIV and hepatitis C virus (HCV) infections among incarcerated populations in the Middle East and North Africa (MENA) and the links between prisons and the HIV epidemic are poorly understood. This review synthesized available HIV and HCV data in prisons in MENA and highlighted opportunities for action. METHODS: The review was based on data generated through the systematic searches of the MENA HIV/AIDS Epidemiology Synthesis Project (2003 to December 15, 2015) and the MENA HCV Epidemiology Synthesis Project (2011 to December 15, 2015). Sources of data included peer-reviewed publications and country-level reports and databases. RESULTS AND DISCUSSION: We estimated a population of 496,000 prisoners in MENA, with drug-related offences being a major cause for incarceration. Twenty countries had data on HIV among incarcerated populations with a median prevalence of 0.6% in Afghanistan, 6.1% in Djibouti, 0.01% in Egypt, 2.5% in Iran, 0% in Iraq, 0.1% in Jordan, 0.05% in Kuwait, 0.7% in Lebanon, 18.0% in Libya, 0.7% in Morocco, 0.3% in Oman, 1.1% in Pakistan, 0% in Palestine, 1.2% in Saudi Arabia, 0% in Somalia, 5.3% in Sudan and South Sudan, 0.04% in Syria, 0.05% in Tunisia, and 3.5% in Yemen. Seven countries had data on HCV, with a median prevalence of 1.7% in Afghanistan, 23.6% in Egypt, 28.1% in Lebanon, 15.6% in Pakistan, and 37.8% in Iran. Syria and Libya had only one HCV prevalence measure each at 1.5% and 23.7%, respectively. There was strong evidence for injecting drug use and the use of non-sterile injecting-equipment in prisons. Incarceration and injecting drugs, use of non-sterile injecting-equipment, and tattooing in prisons were found to be independent risk factors for HIV or HCV infections. High levels of sexual risk behaviour, tattooing and use of non-sterile razors among prisoners were documented. CONCLUSIONS: Prisons play an important role in HIV and HCV dynamics in MENA and have facilitated the emergence of large HIV epidemics in at least two countries, Iran and Pakistan. There is evidence for substantial but variable HIV and HCV prevalence, as well as risk behaviour including injecting drug use and unprotected sex among prisoners across countries. These findings highlight the need for comprehensive harm-reduction strategies in prisons

Coupled computational fluid dynamics-response surface methodology to optimize direct methanol fuel cell performance for greener energy generation

Optimization of operational parameters is vital for improving the performance of direct methanol fuel cells. To investigate the effects of these parameters on the power density, the experiments were performed using an experimental setup to yield the highest performance. In this regard, response surface methodology (RSM) was applied to select the proper combination of operating variables such as cell temperature, methanol concentration, and oxygen flow rate. Furthermore, a computational fluid dynamics (CFD) model of DMFC flow field plates, including two parallel-serpentine channels with circular bends were conducted using the finite element method at the optimum operating conditions, which obtained by applying RSM. The developed model solves the conservation of charge, mass, momentum, and species (methanol, water, and oxygen) transport equations. The performance tests based on RSM gave the optimum operating conditions as a cell temperature of 70 degrees C, methanol concentration of 1 M, and an oxygen flow rate of 300 ml/min. The mathematical model in the optimal operating conditions showed that the polarization curve obtained from the modeling study is in good agreement with the experimental data. Also, the concentration distributions of methanol and oxygen at the optimum operating conditions were predicted by the CFD model. (C) 2020 Elsevier Ltd. All rights reserved

Consumption Pattern of Edible Oils and Its Related Factors Based on PRECEDE Model in Urban and Rural Women Referring to Health Centers in Qom Province

Abstract Background: The evaluation of the amount and type of edible oils can significantly help to raise the people’s awareness about how to use this type of food product. The aim of this study was to determine consumption pattern of various edible oils and its related factors based on PRECEDE model. Materials and Methods: This cross sectional descriptive analytic study was performed on 300 urban and rural women referring to health centers in Qom province. The participants were selected via multi-stage sampling method. The data were collected using standard questionnaire of PRECEDE model and analyzed by SPSS V.20 using independent t-test, paired t-test, ANOVA, and Pearson correlation coefficient. Results: The results of this study showed that 46.4% of urban women and 53.6% of rural women used solid oil. There was a significant difference between urban and rural households in terms of the consumption of tallow oil (p<0.05), as the consumption of tallow oil was more prevalent in rural households than in urban households. Also, there was a statistically significant difference between the two groups of urban and rural women in terms of the mean score of consumption of healthy edible oils and reinforcing factors (p<0.05), as the mean scores of urban women were better than those of rural women. Conclusion: Implementation of training programs using training models such as the PRECEDE model can help to modify and correct the pattern of consumption of edible oils, especially in rural areas and promote the level of health of the community

Changes in vascular structure in diabetic patients after 8Â weeks aerobic physical exercise: a randomized controlled trial

Diabetes is a highly prevalent metabolic disease with macrovascular and microvascular complications. Insulin resistance plays a major role in the pathogenesis of atherosclerosis in type 2 diabetes patients. The risk of atherosclerosis progress in diabetes is of 2�4 orders of magnitude. Early atherosclerosis can be detected by carotid intima-media thickness (cIMT) ultrasonography. There is an inverse relationship between intima-media thickness and physical activity. The aim of this study was to investigate the effects of an 8-week aerobic exercise program on the vascular structure in different segments of the carotid artery. This study was a randomized control trial. Thirty individuals were selected out of 642 volunteers who fulfilled the inclusion criteria. They were randomly divided into aerobic exercise and control groups by a block randomization method. This study was carried out during May�October 2016 in Iran. The aerobic protocol comprised of 24 sessions of aerobic exercise on a treadmill for 30 min per session, 3 days a week. The intensity of the training protocol was 50�70 of the patient�s max heart rate. Measurements of vascular parameters were evaluated by the same person, before and after the 24-session intervention. There were no significant differences between anthropometric, sex, age, diabetic history, and cardiac ejection fraction, compared to baseline characteristics. Intima-media thickness (0.52 ± 0.12), intima-media/lumen (0.07 ± 0.02) in bulb carotid, common carotid, and internal carotid, as well as bulb wall, were reduced significantly in the training group compared to the control group after 8 weeks (p < 0.05). Twenty-four sessions of aerobic exercise improved vascular parameters in type 2 diabetics. © 2017, Research Society for Study of Diabetes in India

Changes in vascular structure in diabetic patients after 8Â weeks aerobic physical exercise: a randomized controlled trial

Diabetes is a highly prevalent metabolic disease with macrovascular and microvascular complications. Insulin resistance plays a major role in the pathogenesis of atherosclerosis in type 2 diabetes patients. The risk of atherosclerosis progress in diabetes is of 2�4 orders of magnitude. Early atherosclerosis can be detected by carotid intima-media thickness (cIMT) ultrasonography. There is an inverse relationship between intima-media thickness and physical activity. The aim of this study was to investigate the effects of an 8-week aerobic exercise program on the vascular structure in different segments of the carotid artery. This study was a randomized control trial. Thirty individuals were selected out of 642 volunteers who fulfilled the inclusion criteria. They were randomly divided into aerobic exercise and control groups by a block randomization method. This study was carried out during May�October 2016 in Iran. The aerobic protocol comprised of 24 sessions of aerobic exercise on a treadmill for 30 min per session, 3 days a week. The intensity of the training protocol was 50�70 of the patient�s max heart rate. Measurements of vascular parameters were evaluated by the same person, before and after the 24-session intervention. There were no significant differences between anthropometric, sex, age, diabetic history, and cardiac ejection fraction, compared to baseline characteristics. Intima-media thickness (0.52 ± 0.12), intima-media/lumen (0.07 ± 0.02) in bulb carotid, common carotid, and internal carotid, as well as bulb wall, were reduced significantly in the training group compared to the control group after 8 weeks (p < 0.05). Twenty-four sessions of aerobic exercise improved vascular parameters in type 2 diabetics. © 2017, Research Society for Study of Diabetes in India