کاظم باعثی

Background and Objectives One of the most important proteins of the SARS-COV-2 virus is S protein, which consists of S1 and S2 subunits. The most important region insubunit S1 is the receptor binding region (RBD), which plays a key role in binding toACE receptors. The RBD is a conserved region in S protein that is the target of theimmune system and the production of antibodies against the virus. Due to theimportance of this region in the production of neutralizing antibodies, it can be a goodcandidate for vaccine development and production of diagnostic kits. Therefore, thepresent study aimed to assess the response rate of antibodies in the serum ofrecovered COVID-19 cases using recombinant RBD protein produced in the prokaryoticexpression system as an inexpensive expression system.Subjects and Methods In this study, the recombinant PET22b-RBD construct wastransformed to the Escherichia coli (BL21) host, and the bacterial cells were culturedin a culture medium; thereafter, protein expression was induced using isopropyl beta-D-thiogalactoside (IPTG). The expression of recombinant RBD protein was confirmedby acrylamide gel (SDS-PAGE) and Western blotting. Finally, the desired protein wasextracted using a Ni-NTA column and applied in an indirect ELISA.Results In comparison with the serum of healthy individuals (cut off: 0.412), nosignificant increase was observed in the response of 30 serum samples to therecombinant RBD protein.Conclusion The recombinant RBD protein produced in the prokaryotic host did notrespond significantly to the antibodies in the serum of recovered COVID-19 patientsand cannot be used for diagnostic purposes.

Anti-Retroviral Therapy (ART) should considerably ameliorate the recovery of the immune system in HIV infected patients. In some patients a failure to satisfactorily increase CD4 counts on ART despite successful virological control did occur, named discordant immune response (DIR).  The aim of this study is the evaluation of CD28, CXCL12, FOS genes in patients with DIR.

In current study, after PBMC isolation, RNA was extracted for two groups; Control group (immunologic responders) and case group (non immunologic responders). Real-time relative quantitative PCR was performed in duplicate using One Step PrimeScript™ RT-PCR Kit and data analyzed by using GraphPad prism software version 8.0.2.

The expression levels in the case group compared to the control group were measured for CD28, CXCL12, FOS. The Fold change ratio for CD28 and CXCL12 were (0.46), (0.19) respectively and in both of them, a significant decrease was observed. The Fold change ratio for FOS was (0.70) and no statistically significant was observed.

we showed significantly decrease in the expression of CD28 and CXCL12 genes in the case group compared to control group, but we couldn’t say, this low expression of these genes are the reason of the low count of CD4 T cells. The more investigation is necessary for it, if the suppression of these genes can impact on proliferation of CD4 T cells, in-vitro.

Cardiomyopathy is one of adverse effects of diabetes that associated with cardiac muscle metabolism and function disruption. Exercise training decreases adverse effects of diabetes on heart by changing genes involved in cardiac metabolism and increasing myokines secretion. So, the aim of this study was to investigate of 8 weeks aerobic training on cardiac PGC-1α gene expression and plasma irisin in STZ-induced diabetics’ rats.

16 STZ-induced diabetics Wistar rats (10 weeks old) divided into control and aerobic training groups. Time and intensity of exercise session began with 15 minutes and 10 m/min, and gradually increased to 40 minutes and 25 m/min at seventh week and kept to the end of eighth’s week (8 weeks). Cardiac PGC-1α gene expression analyzed by PCR, and plasma concentration of insulin, glucose were analyzed by ELISA method 48 hours after the last session of exercise training. Data were analyzed by independent t test at alpha level of 0/05.

the results showed that aerobic exercise training increased PGC-1α concentration (P<0/001) and plasma irisin (P<0/001). Further analysis showed that aerobic exercise training decreased glucose concentration (P<0/001) and increased insulin concentration (P<0/001), but had no effect of insulin resistance (P=0/79). In addition, the results revealed that there is a positive correlation between PGC-1α and plasma irisin (P<0/001) and insulin (P=0/019), but it has a negative correlation with plasma glucose (P=0/001). There is also a positive significant correlation between isirin and insulin (P=0/001), and a negative correlation between irisin and glucose (P=0/002).

The findings suggest that aerobic exercise training induces increased cardiac PGC-1α gene expression and plasma irisin. These changes have a significant correlation with lowered glucose and increased plasma insulin insulin in STZ-induced diabetics’ rats.

Due to the significant role of PGC1α in glucose metabolism, insulin has also been induced by the Myokines with sports activities, which is reduced with type 2 diabetes. The gene expression of PGC1α in diabetic people is reduced up to 50%. The purpose of this study was to explore the Effect of 8 weeks of resistance training on IRISIN plasma serum and the gene expression of PGC1α cardiac muscle in (streptozetosin) induced diabetic rats. Sixteen male Wistar rats with an average weight of 200 ± 20 g were randomly assigned to one of the two groups of the diabetic control (n = 8) and the diabetic resistance (n = 8) and were kept in vitro. The experimental group received resistance training for 8 weeks. The following factors were measured: Blood samples were taken and then their heart was abroad and using the Real Time-PCR method, the gene expression of PGC1α of the left ventricle were measured. Independent sample t-test was used. The results showed that there was a significant difference between the average Irisin (p=0/002), gene expression of PGC1α (p=0/001), glucose level (p=0/001) and insulin (p=0/004) between the resistance diabetic group and the control diabetic group. Based on the results of the present study, it seems that resistance training is recommended as an important strategy for improving the gene expression of PGC1α and glucose metabolism in diabetics. Therefore, it can be considered as an effective interference method.

Diabetesis one of the most common metabolic diseaseswhich is characterized by hyperglycemia and failure of endogenous insulin.Levels of serum retinol-binding protein 4(RBP4) as an adipokin increase in insulin resistant or type 2 diabetic patientsreferring to its role in regulation of insulin function and glucose metabolism. The present study was designed to investigate the effect of resistance training on serum levels of RBP4 and insulin resistance (IR) index in type II diabetic male wistar rats.
Male 8-week-old Wistar rats were randomly assigned as study samples. Diabetes was inducedby intra peritoneal injection nicotinamid and streptozotocin. Five days after injection, blood glucose was measured and the rats with fasting glucose levels between 400-126 mg/dl, were considered as diabetic rats. Based on homogeneous body weight,rats were randomly categorizedinto two control and resistance training groups. Onemonthafter inducing diabetes, rats in the training group carried out an eight-week exercise program on a step ladder, whereas control group remained sedentary in their cages. The levels of the serum glucose, insulin, RBP4, and insulin resistance index (HOMA-IR) wereassessed.
Serum concentration of RBP4[(57/3±9 to 70/9±12)(ng/dl),(p=0/007)], glucose[(234/8±36 to 324/5±16)(mg/dl), (p=0/001)], insulin[(5/5±0/8 to 6/7±0/66)( µmol//l),(p=0/002)], insulin resistance index[(0/3±0/11 to 0/2±0/18)( HOMA-IR), (p=0/002)] were significantly decreased in the training group in comparison with the control group.
The present study showed that resistance training could decrease glucose, insulin, and RBP4 level and improves insulin resistance in rats with type 2 diabetes.Therefore,it seems that this type of training can also be appropriate in patients with type 2 diabetes.

Autophagy (self-digestion) is a highly regulated process for the degradation of damaged proteins and intracellular components. Autophagy has multifunctional roles in the protection of cellular homeostasis. Beclin1 is a key regulator molecule in autophagosome formation. Inhibition of autophagy by destruction of the Beclin 1 allele creates sensitivity to metabolic stress. Inhibition of the autophagy under conditions of nutrient deprivation in tumors resistant to apoptosis can lead to necrosis, inflammation and increased tumor growth. This study aims to assess the effect of autophagy induction on the necrosis pathway of MDCK cells.
We evaluated induction of autophagy by the Beclin1 gene in MDCK cells and assessed the percentage of necrosis cell death by flow cytometry using an Annexin V Staining kit. In order to induce autophagy, the recombinant pcDNA3.1-Beclin 1 was transfected into the MDCK cell line using lipofectamine TM 3000.
Overexpression of the Beclin1 gene in MDCK cells led to induction of autophagy as seen by intracellular autophagosomal indicator LC3-II staining. There were 9.92% positive LC3 structures in transfected cells and 0.15% in untransfected cells. In the transfected and control groups, the rate of necrosis cell death was 1.66% and 0.06%, respectively.
Crosstalk between autophagy and necrosis pathways might affect the fate of the cell life span. Strategies that involve in modulation of autophagy and cell death might lead to therapeutic interventions in diseases. Therefore manipulation of cell death pathways could create new areas in therapeutic uses and interventions.

Type 2 diabetes is a risk factor for heart disease and has a major contribution in mortality due to cardiovascular diseases. In the present study, the effect of 12-week resistance training was investigated on cardiac hypertrophy, glucose, level, insulin, and insulin resistance index in STZ-induced diabetic rats.
A total of 16 male Wistar rats (mean weight, 200±20g) were randomly divided into two groups of diabetic control and (N= 8), diabetic resistance (N= 8). The diabetic resistance training group performed a 12-week resistance training, and 48 hours after the end of the last training session, the rats were anesthetized and euthanized. The variables of interest (body weight, heart weight, left ventricular weight, percentage of heart weight to body weight, percentage of left ventricular weight to heart weight, resting heart rate, level of glucose, insulin, and insulin resistance index), were measured. Data analysis was performed using independent samples t-test at significance level of p≤0.05.
There was a significant difference among mean heart weight (p=0.050), left ventricular weight (p=0.002), level of glucose (p=0/000), insulin (p=0.000), and resting heart rate (p=0.021) in the resistance diabetic group compared to the control diabetic group.
According to the results of the present study, it seems that resistance training is an important strategy to improve the structure and function of the heart in diabetics and it can be considered as an effective intervention method.

Although less is known about the molecular mechanisms responsible for its genetic compatibility, regular training is identified as a non-pharmacological treatment for obesity and type-II diabetes. This study aimed to determine the effect of a 3 months aerobic training on pancreatic TCF7L2 expression and glycemic profile in type II diabetic rats.
In this experimental study, type II diabetes was induced in male Wistar rats (n=16, weight: 220±30 g) by intraperitoneal injection of streptozotocin- nicotinamide. Animals were randomly divided into Exercise (n=8) and Control (n=8) groups. Exercise group, but not Control group, was completed a 3 month aerobic training (3 sessions/week). Forty-eight hours after the last exercise session, the relative expression of pancreatic TCF7L2, fasting glucose and serum insulin were measured in two groups.
Compared to Control rats, exercise resulted in a significant decrease in fasting glucose in Exercise group (P=0.001). Serum insulin was increased significantly by aerobic training in Exercise group compared to Control one (P=0.014). However, pancreatic TCF7L2 expression did not change by aerobic training (P=0.876).
Based on these data, while we concluded that a long-term aerobic training effectively improves the glycemic profile and insulin concentration of type II diabetic rats, such improvements cannot be attributed to TCF7L2 expression in pancreatic tissue.

Type 2 diabetes is a multifactorial disease, but recently it has been found that increased expression of MTNR1B gene is associated with of the risk of type 2 diabetes. The aim of this study was to evaluate the effect of 12 weeks of resistance training on MTNR1B gene expression in the pancreas and glucose and insulin levels in male Wistar rats with type 2 diabetes.
This study was a fundamental and experimental approach. In this study 30 male Wistar rats weighing 220±20 g, were used. Rats were kept under the standard conditions of temperature of 22 °±2 C and humidity of 45% and consecutive 12-hour periods of light and darkness. Rats were divided into three groups: Control group, diabetic group, and diabetic plus resistant training group. Diabetes was induced by disolving nicotinamide and STZ in the drinking water. Resistance training was conducted for 12 weeks, 5 days a week in a 3 course with 6 repetitions. All rats were sacrificed 48 hours after the last training session.
A significant reduction in fasting glucose levels was observed in the diabetic resistant training group than the diabetic group (P The results showed that twelve weeks of resistance exercise significantly increased serum insulin, a significant reduction in blood glucose and a significant reduction in the MTNR1B gene expression in the pancreatic than diabetic group.

Protein tyrosine phosphatase 1B (PTP1B) is a key enzyme in dephosphorylation of the insulin receptor (IR) and it is a central factor to induce the insulin resistance. The purpose of this study was to evaluate the effect of 12-week aerobic training on protein tyrosine phosphatase 1B gene expression and insulin resistance in diabetic rats.
In this study, 16 Wistar rats were divided into aerobic training and control groups. After inducing diabetes intra protaneally, aerobic training group performed training protocol for 12 weeks and 5 session/week. The duration and speed of each session increased progressively as 18 to 26 m/min and 10 to 55 min, respectively. Then, blood and tissue (from gastrocnemius) sampling were carried out in diabetic rats. Insulin resistance markers and PTP1B gene expression were evaluated by commercial kits and Real-Time PCR method, respectively.
Findings showed that PTP1B significantly was decreased in diabetic rats of aerobic training group (p=0.0001). Also, glucose and insulin resistance significantly was decreased in aerobic training groups (p=0.02 and p=0.006, respectively). However, insulin in control rats was significantly increased (p=0.015).
It seems that, current aerobic training protocol has capability to decrease PTP1B and insulin resistance in diabetic rats. Furthermore, the direct correlation between PTP1B and insulin illustrated that any changes in insulin resistance due to exercise training associated with diminution of negative regulation of insulin signaling pathway.

Cardiomyopathy is a side effect caused by diabetes. Prolonged hyperglycemia gives rise to an increase in the expression of the receiver gene RAGE subsequently triggering pathogenesis cardiac signaling pathways in the heart of rats with type II diabetes. The present paper aims to examine how a 12 week Resistance training on gene expressions RAGE, ICAM, VCAM in the heart of diabetic rats with STZ.
16 male Wistar rats with weight mean ranging from 200 ± 20 g were randomly assigned to two groups of Resistance diabetes (n = 8) and control diabetes (n = 8) and were kept under lab circumstances. A 12 week Resistance training was administered with the experimental group and 48 hours after the end of the last training session the rats were made unconscious and examined. Their hearts were, afterwards, cut out and the extent of gene expressions RAGE, ICAM, VCAM in the left ventricular heart was measured using Real time-PCR method.
The results indicated there was a significant difference between left ventricular heart of the Resistance diabetes and that of control diabetes in terms of gene expression RAGE, yet no significant difference was detected between the two groups in terms of gene expressions ICAM, VCAM.
According to the results, in seems that Resistance trainings effectively reduce gene expressions RAGE and reduction pattern but non-significant in the Gene ICAM, VCAM in left ventricular heart of diabetic rats and therefore can be considered an effective way in reducing pathogenesis cardiac signaling pathways in the heart of rats with type II diabetes.

Type 2 diabetes is a chronic disease with warning increasing rate in the world. Although type 2 diabetes is a multifactorial disease, it has been recently found that the incidence of type 2 diabetes is associated with MTNR1B gene and the growth of its expression increases the risk of type 2 diabetes. The objective of this study was to evaluate the effect of 12-week aerobic exercise on MTNR1B gene expression, glucose and fasting insulin in male Wistar rats with type 2 diabetes.
This fundamental study with experimental approach. included 30 male Wistar rats with weight of 220±20 gram. Sampls were kept under standard conditions: temperature of 22 ± 3° centigrade, 45% humidity and consecutive 12-hour periods of light and darkness. The rats were divided into three groups. Infusion of diabetes was conducted by Nicotinamide and streptozotocin solution.Training program was held on 5 days a week for 12 weeks with a gradual increasing of speed (18 to 26 meters per minute) and time (10 to 55 minutes) by running on a treadmill. Glucose level, insulin level and gene expression were measured by enzyme glucose oxidase colorimetric method, enzyme-linked immunosorbent assay, and Real-time polymerase chain reaction. All statistical analyses were performed by software SPSS, version16.
Training programme led to a significant reduction in fasting glucose levels in aerobic diabetic group compared to the control diabetic group (P The results showed that 12-week aerobic exercise led to a significant reduction in blood glucose and in gene expression MTNR1B in pancreatic tissue compared to the diabetic control group.

Type 2 diabetes as a factor for heart disease is a major contributor to deaths due to cardiovascular disease, The aim of this study was to evaluate The effects of 12 week endurance training on serum glucose, insulin and heart structure in type 2 diabetic Rats.
16 male Wistar rats with an average weight of 200 ± 20 g were randomly divided into two groups, diabetic control (n = 8) and diabetic endurance (n = 8) and were kept in vitro, The experimental group received endurance training for 12 weeks. The following factors were measured: Body weight ( BW), heart weight (HW), left ventricular mass (LHW), percentage of heart weight to body weight (HW / BW), heart weight, left ventricular weight (LVW / HW), resting heart rate (RHR ), amount of glucose, insulin, insulin resistance index, In order to analyze the data, independent sample t-test at p ≤ 0/05 significance level was used.
The results showed that there was a significant difference between the average left ventricle weight (P= 0/005), the percentage of the heart weight to the body weight (P= 0/001), amount of glucose (P= 0/000), insulin (P= 0/000), and resting heart rate (P= 0/003), between the endurance diabetic group and the control diabetic group (p Based on the results of the present study, it seems that endurance training affects the amount of blood glucose and insulin and the heart structure. Therefore, it can be considered as an effective interference method.

The use of antiretroviral drugs has proven remarkably effective in controlling the progression of human immunodeficiency virus (HIV) disease, but these benefits can be compromised by the development of drug resistance. This study aims to assess the drug resistance profile of the Pr gene in highly active antiretroviral therapy (HAART)-treated and naïve HIV-1 infected patients. A total of 30 samples from naïve and 16 samples of highly active antiretroviral therapy (HAART)-treated patients were collected and divided into two groups. After RNA extraction, RT nested PCR was performed. The final products were sequenced and then analyzed for drug-resistant mutations and subtypes. No drug resistant mutations were noted in group one that have never used drug, but 40% of group two samples which are under treatment contained drug resistant mutations. According to the results, the following subtypes were seen among patients: A (50%), B (40.6%), D (6.2%), and C (3.2%). Transmission of drug-resistant viruses and their detection are very important epidemiologically. However our data and other studies suggest that other PIs should be replaced by LPV in the HAART regime.

Background and ObjectivesHuman immunodeficiency virus (HIV) is the retrovirus that causes the disease known as AIDS. In the current study, we examined the genetic diversity of HIV-1 strains circulating in Iran. Materials and MethodsSequencing and phylogenetic analysis of human immunodeficiency virus type 1 (HIV-1) pol gene is a useful method for subtyping strains of HIV-1. HIV-1 RNA was derived from plasma of 24 infected patients in Imam Khomeini Hospital in Tehran. RT Nested-PCR was developed and the product was extracted from agarose gel. The products were sequenced and phylogenetic analysis by Mega 4 software was constructed. ResultsThe developed PCR method successfully amplified the specific sequence. The sequence and phylogenetic analysis showed subtypes A1 and B in 14 and 10 patients, respectively. ConclusionsThe results indicated intravenous drug users infected with HIV-1 subtype A1, and hemophiliacs infected with HIV-1 subtype B. The results also showed that the subtype A1 is the most prevalent in HIV infected patients. Such information can be useful in intervention strategies and control programs.