مجله دانشگاه علوم پزشکی اراک
سال هفدهم شماره 4 (پیاپی 85، تیر 1393)

Derived hormones from Adipokines include leptin, adiponectin, resistin, apelin, omentin.The aim of present study was to investigate the effect of 12 weeks aerobic exercise on plasma levels of Apelin, Omentin and glucose in obese older women with diabetes type 2. In this study, 30 obese older women were chosen. They were also divided in to two groups: control (n=15; Age: 53.3+5.88; BMI: 28.7+2.2) and experimental (n=15; Age: 52.6+ 7.12: BMI: 30.03+3.6) according to their fat percentage and BMI. The training program included aerobic exercises which were conducted increasingly, 3 times a week for 12 weeks. Blood samples were taken before starting the exercise training and also 24 hours after the last training session. U Mann-Whitney Test was used to evaluate the data and in order to compare each group's pretest and posttest, Wilcoxon test was used at the significance level of p≤ 0.05. There were significant changes in apelin and glucose plasma levels in the training group (p=0.001 and p=0.006 respectively). Furthermore, no significant difference was observed between each group's omentin levels. It was finally concluded that exercise training can facilitate the process of glucose entrance into a cell because of the continuous muscle contractions and also decrease the plasma glucose. Also each adipokine response might be depend on the intensity and duration of exercise training, separately.

According to the important of SALL4 gene during the development of embryonic neurvous system, our aim in this study was to analyze and quantify mRNA expression of SALL4 in Prosencephalon during different stages of chicken embryogenesis. In this experimental study, incubated Ross fertilized eggs were applied in 37°C-37.5°C in 60-65% humidified atmosphere after beginning of embryogenesis. Prosencephalon part of the brain tissue was collected from the eggs, daily. Total RNA extraction and cDNA synthesis was performed from resected tissues. The synthesized cDNA was used as template for quantitatively analysis of SALL4 mRNA expression by real-time PCR. The Results indicate that the level of SALL4 gene expression is significantly variable during embryogenesis. However it doesn’t show variation during the early days. The maximum copy number of SALL4 mRNA was quantified on 15 th day of chicken development. SALL4 mRNA expression is high when the Prosencephalon is under development, using of HAMBURGER–HAMILTON chart, there is relation between increasing SALL4 expression and developing limbs and anterior brain.

The Real-time PCR assay has been established as the standard method for Human Cytomegalovirus (HCMV) quantitation in immunocompromised patients. However, the question of which one of whole blood or plasma specimens is better for viral quantitation is still unresolved for many clinical laboratories. To answer this question, the current study compares HCMV DNA load in whole blood and plasma samples. In this prospective study, the whole blood and plasma samples were obtained from 41 transplantated patients and the viral load was detected using a validated, in-house Real-time PCR assay. Of the total 193 examined specimens, 174 were negative and 19 samples, from 16 patients, were positive in at least one of whole blood or plasma samples. Based on the results of linear regression analysis, the cytomegalovirus viral load was correlated in whole blood and plasma samples (R2: 0.872). However, the regression equation shows that the HCMV load in whole blood samples is higher than load of this virus in plasma. The validity of the quantitative results was confirmed by repeating the tests and analyzing the results using the repeated measure analysis. Based on the results of the present study, HCMV quantitation in whole blood samples has a higher analytical sensitivity than in plasma samples.

Physical activity and overweight both changethe body homeostasis; for this purpose, in this study effect of two models of high and moderate intensity aerobic exercises on the amount of Adiponectin and Resistin were compared inobese and overweight females. In this experimental study, 15 obese and overweight female (Mean age: 22.93±0.54 years; weight: 75.15±2.07 kg; hight: 160.6±1.38 Cm; BMI: 29.24±0.73kg.m-2) were randomly selected as sample. Subjects were placed into high (33 min exercise, 85-90% of max hearat rate) and moderate (41 min exercise, 50-70% of max hearat rate) intensity aerobic exercise groups. Exercises lasted three days a week for eight weeks with an equal volume of consumed energy. In order to analyze data, independent-t test and Repeated Measure analysis of variance were used at a significance level of <0.05. The results indicate a significant increase in Adiponectin after eight weeks of high-intensity aerobic exercise compared to moderate-intensity exercise (p=0.02). A significant reduction in fat mass and percentage was observed after moderate intensity exercise (p=0.03), too. In Addition, moderate intensity exercise caused a considerable decrease in Resistin after eight weeks (p=0.06). High-intensity exercise appears to provide necessary metabolic stress to enhance Adiponectin, even without weight and fat loss.

There are few studies related to effects of exercise training, including concurrent training, on hormonal changes in children. Hence, the aim of this study was to Compare theeffects of 6 weeks of resistance training and concurrent resistance and endurance training on aerobic power (VO2peak) and resting levels of growth hormone and cortisol in healthy children. The subjects ofthis quasi-experimental study were 35 healthy boys between 9-11 years old, which were randomly divided into three groups of concurrent training (n=12), resistance training (n=11), control (n=12). Experimental groups were trained during 6 weeks; 3 times a week.Control group were performed only their routine activities. VO2peak test was taken 48 hours before and after implementation of 6-weeks protocols and samples were selected from all subjects.Measurement of resting levels of GH and cortical was performed with ELISA method. For data analysis, one way ANOVA and paired t-test were used. The results showed that VO2peak and resting levels of GH increased significantly in concurrenttraining group (p=0.001, p=0.003, respectively). Resting level of cortisol in concurrent group was significantly lower than the other groups (p<0.05) and it was reducedsignificantlyin concurrent training and resistance training groups (p=0.001, p=0.036). It seems a concurrent training period has greater benefits on VO2peak and resting levels of GH and cortical in children in comparison with resistance training.

Treatment failure and relapse is a major problem in the treatment and control of brucellosis. The present study directed to determine risk factors for failure of treatment and relapse in patients treated for brucellosis. This study was a descriptive - analytic and prospective study and were conducted in72 patients with acute brucellosis.Patients were followed up during treatment and for six months after completion of therapy, and patients with treatment failure or relapse were analyzed. All data analyzed using SPSS software and P-value of less than 0.05 was considered significant. The mean value of age in patients was 40.2 ± 16.5 years. Treatment failures was 6.9% and the relapse at the end of the ninth month was 12.5% that recurrence of symptoms were associated with increased titers of serological tests and 80.6 percent had successful treatment. In this study gender of male (P = 0.026), occupational exposure (P = 0.005), delayed treatment in less than two weeks (P = 0.016), hepatosplenomegaly (P = 0.003), thrombocytopenia (P = 0.023), CRP ≥ +2 (P = 0.017) and Wright ≥ 1/320 and 2-ME ≥ 1/160 at the end of the sixth week of treatment (P = 0.004 and P = 0.010) were risk factors of treatment failure and relapse in brucellosis. The diagnosis and treatment of relapse and treatment failure in acute brucellosis is not clear, therefore, the prediction of relapse may be useful in preventing recurrence and treatment of patients.

Wharton's Jelly Mesenchymal Stem Cells (WJMSc) are potential renewable source of cells in replacement therapies of many diseases. Different biomaterials have been used as a scaffold to mimic the stem cell niche, which is important for promoting cellular interactions, cell proliferation and differentiation. Encapsulation involves entrapment of living cells within the semi-permeable membrane for the exchange of nutrients, oxygen and stimuli, whereas antibodies and host immune cells are kept out. In this study, a new approach for culturing and differentiating Wharton's Jelly Mesenchymal Stem Cells to definitive endoderm in a three dimensional environment using alginate capsules is presented. In this experimental study, Wharton's Jelly Mesenchymal Stem Cells were capsulated and Trypan blue exclusion method was applied to determine cells viability. Then, encapsulated cells have been cultured in medium contain differentiating factors and to investigate the expression of definitive endoderm related genes, Real- time PCR was performed. The encapsulation procedure did not alter the morphology and viability of the encapsulated cells. Post-differentiation analysis confirmed the expression of FOXa2 and SOX17 as definitive endoderm specific markers. Alginate has potential to be used as a three dimensional scaffold for culturing and differentiation of WJMSCs to definitive endoderm.

Streptococcus pyogenes produce extracellular hyaluronidase enzyme which is directly associated with the spreading of the organism during infection. Hyaluronidase enzyme is able to break hyaluronic acid or interstitial cement. This enzyme might be used in cancer treatment.The objective of the present study was to clone and express the nucleotide sequence of this enzyme which is involved in hyaluronidase enzymatic activity. The enzymatic region of hyaluronidase gene was detected by bioinformatics methods. The polymerase chain reaction method was used to amplify the region. The amplified product was cloned into the expression vector pET32a. E. coli BL21 (DE3) pLYsS was transformed with recombinant plasmids. Then gene expression was induced by IPTG. The expressed protein was purified successfully via affinity chromatography by NiNTA kit. The integrity of the product was confirmed by western-blot analysis. The nucleotide sequence of amplified gene was consistent with the streptocuccal hyaluronidase gene. The concentration of recombinant protein calculated to 500 mg purified protein per liter. The enzymatic region of recombinant protein from Streptococcus pyogenes was recognized by all five patient’s sera with Streptococcus infection. In general, it is possible to produce the enzymatic regions of the Streptococcus pyogenes hyaluronidase in Escherichia coli. The antigenic property of the produced protein is well retained. Considering the product's domestic demand and also low efficiency of production and pathogenicity of Streptococcus species, it is possible to produce it as recombinant product.

Peripheral nerve injures are common in clinical practice that includes from compression injury to complete disruption of nerve trunk. After injury nerves can grow and repair spontaneously, early end to end anastomosis is first choice for repair but only 50% of nerve fiber would be physiologically accurate and effective, thus several techniques for repair of nerve injury are introduced including combination of nerve transplant with silicon tubes, use of biologic and synthetic tubes for nerve conduit. In this Exprimental study, 20 rats with the same weight were selected and kept in the same condition. The left sciatic nerve of them was cut and were divided in two groups.In the first group the facial flap method for repair of nerve injury was used. In the second group vein conduit method was used as standard method. Histological nerve repair was assessed after 45 days and the intact right sciatic nerve was used as control. Repair of nerve injury in proximal, mid and distal portion of nerve in facial flap method was more effective than vein conduit (P<0.05). Repair of nerve injury in proximal, mid and distal portion had no difference compared with control group (p>0.05). Repair of nerve injury with facial flap method is more effective than standard method and can be used as a new method for nerve repair.

Pediatricians frequently confront with elevated body temperature in children and subsequent anxious parents. They practice several approaches in management of fever. A recently addressed issue is administration of alternating doses of acetaminophen and Ibuprofen. This method is relatively common, despite lack of sufficient evidence in this field. This study is a randomized clinical trial. A total of 240 children, aged 6 months to 12 years suffering from gastroenteritis was recruited in this research. Children were classified in 3 groups. First group received Acetaminophen, second group received Ibuprofen and third group were treated with acetaminophen – Ibuprofen every other day alternately. 240 child were taken apart in this research. 112 ones were female (46.66%) and 128 were male (53.33%). The mean time of lowering fever in the first group was 2.07 days. This figure in the second and third groups were 1.82 and 1.87 respectively. Average doses in the first, second and third groups were (in order) 9, 8.17 and 7.13 doses. Medication in the first group minimum effectiveness rather than two other groups. The alternating regimen of Acetaminophen – Ibuprofen is more effective than monotherapy in reduction of fever in infants and children between 6 months to 12 years.