زیست پزشکی جرجانی (حکیم سید اسماعیل جرجانی)
سال:1393 | دوره:2 | شماره:2 |تعداد مقالات:8

Infertility is defined as the absence of pregnant after one year of regular unprotected sexual intercourse. In women, infertility may be caused by several factors, all of which may be affected by genetic factors. Epigenetic changes play a key role in embryonic development, ovulation, and spermatogenesis. During oocyte growth, follicular cells form a multilayer coating of granulosa cells, which are affected by gonadotropin hormones and secrete steroid hormones. TheCYP11A1gene is also involved in the pathway of steroid hormone production in luteinizing granulosa cells. The CYP11A1 enzyme converts cholesterol into pregnenolone in the progesterone production pathway. Progesterone is an important steroid hormone, which is significantly involved in fertility and pregnancy. Histone modifications also contribute to the induction of the CYP11A1gene, and methylation of histone H3 on lysine 4 (H3K4me) in the regulatory region of the gene leads to the increased expression and activation of gene transcription. The present study aimed to evaluate the methylation level of H3K4me3 in the CYP11A1 gene regulatory region in the granulosa cells extracted from the fertile and infertile women referring to the infertility treatment center in Tabriz, Iran. Chromatin immunoprecipitation (ChIP) and real-time polymerase chain reaction were used to evaluate the methylation level. According to the results, the fertile and infertile women had no significant difference in terms of the H3K4me3 methylation level at the CYP11A1 gene regulatory region. In addition, no significant correlations were observed between histone methylation at the CYP11A1 gene promoter region, follicle rate, and egg maturation.

Background and objectives: Afew large population-based studies have been conducted on the prevalence of oral mucosal lesions in relation to fertility status in the Iranian population. The aim of study was determine the prevalence of oral mucosal lesions in relation to fertility status in women participants of Shahedieh cohort study. Methods: Adescriptive cross-sectional study was conducted on 4935 women who participated in theShahedieh cohort study. The age range of participants was 35-71 years with a mean age of 47. 12 years. The prevalence of oral mucosal lesions considering fertility variables including pregnancy, number of pregnancy, oophorectomy, tubectomy, hysterectomy, infertility, menopause, normal menopause, and abortion, application of infertility and oral contraceptive drugs and hormone replacement therapy were recorded. Results: The total prevalence of oral mucosal lesions in the studied women were 3. 8%. The most commonly affected age group was 40-49 years, followed by 30-39, 50-59 and 60-71 years, respectively. Considering the fertility variables, only menopause (P=0. 047) and normal menopause (P=0. 024) significantly related to the prevalence of oral mucosal lesions. Conclusion: The findings of the present study provide information on the prevalence of the oral mucosal lesions considering fertility status in a large population-based study in Iran. With due attention to the higher prevalence of oral mucosal lesions in menopause women, an improved comprehension of oral manifestations at menopause and preventive and treatment approaches during this period should be programmed with health care services to meet the needs of patients deservingly.

Background and objectives: Acinetobacterisa genus of opportunistic pathogens that are commonly found in the environment. Given the unique ability of these bacteria to survive in the hospital, they are considered as one of the main causes of hospital-acquired infections. The emergence of multidrug-resistant Acinetobacter spp., particularly Acinetobacter baumannii has become a major health threat worldwide. In this study, we investigate antibacterial effects of probiotic isolates from goat milk on clinical isolates of A. baumannii. Methods: In this study, 100 clinical specimens were taken from patients hospitalized in six hospitals in the Golestan Province, north of Iran. Following isolation and identification of A. baumannii strains, antibiotic resistance patterns of the isolates were investigated using the Kirby-Bauer method according to the Clinical and Laboratory Standards Institute (CLSI-2015) guidelines. Probiotic bacteria in goat milk were isolated and identified by culture in MRS and M17 media and carbohydrate fermentation tests. Antibacterial effects of the probiotic bacteria against resistant A. baumannii isolates were evaluated using the agar well diffusion method. Results: Overall, 55% of the isolates were identified as A. baumannii. The highest resistance rates were observed against tobramycin (76. 3%), mezlocillin (74. 5%) and cefotaxime (74. 5%). Resistance to levofloxacin, tetracycline, imipenem and minocycline was detected in 72. 7%, 72. 7%, 70. 9% and 29. 1% of the isolates, respectively. The most common probiotic isolates were Lactobacillus plantarum and Lactococcus piscium (30% each). The highest and lowest effects were exerted by Lactococcus lactis (34. 54%) and Lactobacillus bulgaricus (3. 63%), respectively. Conclusion: Our results demonstrate that the prevalence ofdrug-resistantA. baumannii strains is high in the hospitals. Given the promising antimicrobial effects of the isolated probiotic bacteria, goat milk can be recommended as an adjuvant therapy or an alternative to common antibiotics for improving treatment outcome of infections caused by drugresistantA. baumannii.

Background and objectives: Patients undergoing chemotherapy are severely susceptible to infections due to a compromised immune system and also their oral cavity is a great place for microorganisms and fungi to grow. The aim of this study was to determine the distribution of different strains of Candida from oral lesions of these patients. Methods: This descriptive study was performed on 128 patients undergoing chemotherapy in teaching hospitals of Yazd, which was three weeks passing receiving their first medicine. Oral samples were prepared from swabs and then cultured in Sabouraud dextrose agar culture media for evaluation of yeast growth, colonization, and identification of species. Samples were examined under the microscope and recorded. Finally, the data were analyzed by SPSS17 software, Chi-square, and Man-Whitney tests. Results: 128 patients participated in this study, which included 45 males (35. 15%) and 83 females (64. 85%) with an average age of 40. 16 ± 19. 95 years. 84 patients (62. 65%) had candida in their oral cavity, of which 79 were candida albicans and 5 were Non-albicans Candida. No significant correlation was found between the type of candidates, type of cancer and the frequency of Candida albicans with the age and sex of the patients (P-value <0. 05). Conclusion: Based on the results of this study, the prevalence of Candida albicans in patients undergoing chemotherapy is higher than Non-albicans Candida. Patients with leukemia are more susceptible to Candida infections.

Background and objectives: Autism spectrum disorder (ASD) is a childhood neurodevelopmental disorder and according to DSM-5 classification, its severity includes three levels: requiring support, requiring substantial support, and requiring very substantial support. This classification is unclear from a possible perspective and from a fuzzy point of view; it has a degree of uncertainty. The purpose of this study is to predict the severity of autism disorder by fuzzy logistic regression. Methods: In this cross-sectional study, 22 children with ASD which referred to the rehabilitation centers of Gorgan in 2017 were used as a research sample. Therapist's viewpoint about the severity of the disorder that is measured by linguistic terms (low, moderate, high) was considered as fuzzy output variable. In addition, to determine the prediction model for the severity of autism, a fuzzy logistic regression model was used. In this sense parameters were estimated by least square estimations (LSE) and least absolute deviations (LAD) methods and then the two methods were compared using goodness-of-fit index. Results: The age of children varied from 6 to 17 years old with mean of 10. 44± 3. 33 years. Also, the goodness-of-fit index for the model that was estimated by the LAD method was 0. 0634, and this value was less than the LSE method (0. 1255). The estimated model by the LAD indicates that with the constant of the values of other variables, with each unit increase in the variables of age, male gender, raw score of stereotypical movements, communication and social interaction subscales, possibilistic odds of severity of autism disorder varied about 0. 67 (decrease), 0. 362 (decrease), 0. 098 (increase), 0. 019 (increase) and 0. 097 (increase) respectively. Conclusion: The LAD method was better than LSE in parameter estimation. So, the estimated model by this method can be used to predict the severity of autism disorder for new patients who referred to rehabilitation centers and according to predicted severity of the disorder, proper treatments for children can be initiated.

Background and objectives: Rheumatoid arthritis (RA) is a common chronic and systemic autoimmune disease, characterized by inflammation and the destruction of the joints. It is well known that CD4+ T cells play a major role in the pathogenesis of RA. Expanded subpopulations of CD4+ T cells have been reported in RA patients. Here, we investigated the expression of PD-1 on subsets of CD4+ T cells (CD4+CD28-and CD4+CD28+ T cells) in the peripheral blood (PB) and synovial fluid (SF) of patients with RA. Methods: A total of 42 RA patients, including 10 newly diagnosed (ND) and 32 relapsed (RL) cases and also 20 healthy controls were enrolled. Phenotypic characterization subsets of CD4+ T cells were evaluated by flow cytometry, using fluorescence conjugated specific human monoclonal antibodies. Results: The frequency of CD4+CD28+ T cells was significantly increased in SF versus PB in ND and RL patients. In contrast, the percentage of CD4+CD28-T cells was elevated in PB of ND and RL patients comparison to SF. Expression of PD-1 on CD4+CD28+ and CD4+CD28-T cells in PB of ND and RL patients was significantly higher than the healthy controls. Furthermore, PD-1 expression on CD4+CD28+ and CD4+CD28-T cells in SF versus PB of RL patients were significant increased. Conclusion: These data suggest that CD4+ T cells subsets in RA patients were resistance to PD-1 mediated effects and PD-1 has insufficient ability to suppression of CD4+Tcells.

Background and objectives: Ischemic stroke (IS) is a debilitating disorder with no reliable prognostic or diagnostic biomarker. Here, we evaluated the serum level of Oxidative Stress Balance and assessed their diagnostic and prognostic value for IS. Methods: Sera from 52 patients with IS and 52 age-and sex-matched healthy subjects were collected. All patients were subjected to sample collection at the time of admission, 24 and 48 hours later, at the time of discharge and three months later. Oxidative Stress Balance expression was assessed by ELISA. Statistical measures for diagnostic accuracy of quantitative measures were conducted. Results: We demonstrated Oxidative Stress Balance was elevated at the time of admission in comparison to normal subjects. ROC curve analyse revealed that Oxidative Stress Balance (AUC = 0. 7337; P<0. 0001) was acceptable diagnostic value to discriminate IS patients from normal subjects. Kaplan-Meier survival analyse shown that Oxidative Stress Balance(P=0. 8584) had no prognostic value. Conclusion: Oxidative Stress Balance could be introduced as suggested biomarker to segregate IS patients from normal subjects.