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Background & Objective: Gastric cancer is the 2nd cause of cancer mortality after lung cancer. Approximately 12% of all cancer death are due to gastric cancer. Tumorgenesis is thought to be a multistep process involving a series of genetic changes in oncogenes and suppressor genes. The most common cancer-related genetic change known in human tumors is P53 mutation, particularly in gastric cancer. This study was done to determine P53 gene mutations in gastric cancer. Materials & Methods: This study was performed on 44 biopsy from patients with gastric cancer during 2002 in 3 hospitals in Tehran. For determination of P53 gene mutations was performed PCR-SSCP methods. Results: The patients group comprised 31 males and 13 females (Average age, 60.8 years Ranging from 34 to 84 years). 36 cases (81.8%) intestinal type, 5 cases (11.4%) were diffuse type and 3 cases no defined. 44 gastric cancers of gastric tissues were screened for the mutations of P53 gene mutations in exons 5-8 using the PCR-SSCP analysis. After polyacrylamide gel electrophoresis, 9 patients (20.5%) showed an apparent electrophoretic mobility shift between the cancer and other normal samples. One mutation in exon 5 (11.1%), 2 were detected in exon 6 (22.2%), 3 were found in exon 7 (33.3%) and 3 were detected in exon 8 (33.3%). The mutation rate was 7 of 36 (21.2%) in intestinal type and 2 of (40%) in diffuse type. No significant correlation between P53 gene mutations and age and genus was found. Conclusion: This investigation showed the rate P53 gene mutation (20.5%) in gastric cancer in our society.

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Background and Objective: The obesity and overweight in the children of many developing countries have dramatically increased. Obesity is associated with numerous health problems. While children spend a significant amount of their time in school daily, the various aspects of children school-life such as academic achievement, social skills and attendance, can be affected by obesity and overweight. This study was done to determine the correlation between obesity and overweight with attention dificit in elementary school girls. Materials and Methods: This descriptive-cross sectional study was carried out on 300 girls student of 7-11 years old, in elementary schools in capital city of east Azarbijan cocated North-West of Iran in 2007. The samples selected based on body mass index and were classified by random sampling in three groups including, normal group, overweight group and obese group. The data, collected by child behavior check list (CBCL). The CBCL have 113 iteams, 9 iteams of them were designed for determination of attention dificit in children. The behaviors were scored on a 3-point ranging scale. SPSS-11.5 software and ANOVA statistical test were used to analyse the data. Results: The results showed that overweight group had greater scores in attention dificit scale than other groups and revealed a significant correlation between obesity-over weight and attention dificit (r=0.177, P<0.05). Conclusion: This study indicated a significant correlation between obesity and attention dificit. Prevention of obesity as a first step for prevention of behavioral problems, seems to be essentieal. The treatment of obesity may be a matter of dealing with behavioral problems in children.

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Child abuse as an ominous and abnormal phenomenon was scold in every community. In attention to severity of non - accidental injuries that inflict by parents or guardian and chance of death is considerable, intervention is necessary for life saving at early stage. A large number of child abuse fatality occur in world wide, that usually does not recognize at routine visits. Therefore the need for a program to recognize and intervent is an inevitable task. This study consider child abuse case with fatal abdominal injury with subsequent death.

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Background and Objective: Anesthetic agents effect on pregnancy in operating room personnel is a challenge in anesthesiology. This study was carried out to determined pregnancy complications among hospital operating room personals in Fars province – Iran.

Materials and Methods: In this case-control study, 122 women working in operating rooms of governmental Fars province hospitals during their pregnancies with different jobs considered as case group. 122 women working in internal and pediatric wards considered as control group. The history of pregnancy complications including infertility, abortion, preterm labor, fetal death, neonatal death and low birth weight obtained using questionnaire. Data were analyzed using SPSS-15 software and Chi-Square test.

Results: The incidence of abortion was 19.8% and 16% in case and control group respectively, this difference was not statistically significant. Infertility was significantly higher (8.2% versus 2.5%) in case group than control group (P<0.05). No significant differences in incidence of preterm labor, fetal death, neonatal death and low birth weight were seen between two groups.

Conclusion: This study showed that the incidence of pregnancy complications is similar between women working in operating room and those working in other hospital wards but the prevalence of infertility is higher in operating room personnel than those of other wards.

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Background and Objective: Magnesium (Mg) ion has possible role in protecting neurons and glia from ischemic damage through the cerebral blood flow and neuronal action. This study was done to evaluate the correlation of total serum Mg level with clinical outcomes in stroke patients. Materials and Methods: This cross sectional study was done on 316 patients whom diagnosed with stroke in Imam Hossein hospital, Tehran, Iran during 2010-11. Mg levels in all patients were measured. Also, recurrent transient ischemic attack (TIA), recurrent myocardial infarction or stroke, unstable angina and death as clinical outcomes were follow-up for period of 3 and 6 months after admission. Data were analyzed using SPSS-18, Chi-Square, Fisher and Pearson correlation tests. Results: The mean age of patients was 65±15.8 year. Limb weakness (69.9%) and haemoplasia with 63.6% were the most common clinical complaints. Death was the most common finding in 3 month (16.8%) and recurrent stroke was the most common finding in 6 month follow up (2.5%). There was no significant difference between the total serum Mg and the first and second three-months follow up of clinical outcomes. Conclusion: This study can not show a significant correlation between total serum Mg levels and clinical outcomes after 3 and 6 month follow up in stroke patients.

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Tissue engineering is based on three main factors including scaffolds, cells and growth factors. Natural scaffolds derived from decellularized tissues and organs have been successfully used in tissue engineering. Decellularization studies have shown that natural scaffolds which maintaine their main structure and properties could be a suitable tool for studying cellular behaviors and preparation of such scaffolds is an important part of future research in biology that may have extensive applications in regenerative medicine and tissue engineering. Blastema tissue which is produced after injuries in some organisms has embryonic cell characteristics, and can be a suitable model for evaluation of cell behaviors in various tissues. In this review, the process of decellularization, process involved in preparation of 3D scaffolds derived from extracellular matrix of various tissues including cartilage, bone, gingiva, aorta and bladder, and assessment of their interactions with blastema tissue under in vitro conditions are discussed.

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Background and Objective: Chrysin is a natural and active biological component which is extracted from plants, honey and propolis. Chrysin has anti-inflammatory, anticancer and antioxidant propertis. This study was done to evaluate the effect of chrysin on AGS human gastric cancer cell line. Methods: In this descriptive - analytic study, chrysin was dissolved in dimethyl sulfoxide (DMSO) and the cytotoxic effects of concentrations of 10, 15, 20, 30, 40 ,50, 60, 70, 80, and 100 µM/ml of chrysin on AGS cells was evaluated. Viability of the cells was determined with MTT assay after 24, 48 and 72 hours and compared to controls. Results: Chrysin inhibited the growth and proliferation of human gastric cancer AGS cell line. The antiproliferative effect of chrysin was dose and time dependent. The IC50 values were determined for 60, 30 and 20 µM, in incubation time of 24, 48 and 72 hour, respectively (P<0.05). Conclusion: Chrysin proved to have antiproliferative activity on human gastric cancer cells in culture medium.

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Background and Objective: Colorectal cancer can significantly cause physical, psychological and social problems. This study was done to determine the prevalence of anxiety and depression in patients with colorectal cancer in Babol located in north of Iran. Methods: This cross-sectional, analytical study was done on 120 (75 males, 45 females) patients with colorectal cancer which registered in the Babol cancer registry in north of Iran during 2008-12. A questionnaire containing demographic information, aspects of the disease and HADS questionnaire was completed by interviewing to assess anxiety and depression for each patient. Results: The prevalence rate of depression and anxiety in patients was 23.4% and 30.8%, respectively. Gender, residency of rural area, and having comorbidities are related to depression among which location was identified as an independent predictor. Urban residency had 79% less risk of depression than rural residents (95% CI=0.06-0.67, OR=0.21, P<0.009). Gender, resident of rural areas, unemployed, having comorbidities, low income and lack of education were associated with anxiety, among which only education was identified as an independent predictor (95% CI=1.32-13.81, OR=4.27, P<0.015). Conclusion: The prevalence of anxiety and depression in colorectal cancer patients was high in this area. Therefore, interventions are recommended to increase awareness and greater attention to rural women and controlling comorbidities.

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Background and Objective: Ovarian cancer is the fifth common cancer among women and the number of new cases is increasing. Valproic acid is a histone deacetylase inhibitor effectively used to treat epilepsy and bipolar disease. Recently, this compound has attracted attention as an anti-cancer agent. Bim is one of the most important genes of mitochondrial pathway of apoptosis, and it plays an important role in the biology of cancer. Expression of this gene is greatly reduced in ovarian cancer. This study was done to evaluate the effect of valproic acid on the viability of ovarian cancer cells, apoptosis and Bim gene expression in A2780 line.
Methods: In this experimental study, the human ovarian cancer cells (A2780) were grown in RPMI-1640 medium in appropriate culture conditions. The cells were treated by various concentrations valproic acid (1-30 mM) and were incubated for 24, 48 and 72 hours. After the incubation of period, cell viability was investigated using MTT. Apoptosis was analyzed by flow-cytometry method in the cells were treated by valproic acid. The Real time PCR test was used to assess the effect of this drug on the expression of Bim gene.
Results: The results of MTT assay showed that valproic acid reduced the viability of A2780 cells, and this effect was time and dose-dependent. The reduction of cell viability at 30 mM concentration and 72 hours after treatment, was maximum and statistically significant (P<0.05). Exposure to valproic acid significantly increased the percentage of apoptotic cells (P<0.05). Also, Valproic acid significantly increased the expression of Bim (P<0.05).
Conclusion: Valproic acid reduced viability in ovarian cancer cell line A2780. Valproic acid increased cell death by altering the expression of genes involved in apoptosis in ovarian cancer cell line A2780.

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Background and Objective: Electro convulsion therapy (ECT) is one of the most common ways for treatment of psychiatric disorders. The aim of this study was to compare the effect of Propofol, Etomidate, and Thiopental on seizure and recovery duration following ECT.
Methods: In this clinical trial study, 90 patients diagnosed with a psychiatric disorder by a psychiatrist, who need to be treated by ECT in 5 Azar hospital, Gorgan, north Iran. The patients were randomly divided into the three groups by simple random allocation method. Interventions included standard monitoring and pre-oxygenation with 100% FiO2 for 3 minutes for all patients in three groups. Anesthesia of the patients in the first, second, and third group was done with Thiopental (1.5 mg/kg), Propofol (0.6 mg/kg), and Etomidate (0.1 mg/kg), respectively. Administration of Succinyl Colin (0.5 mg/kg) as muscle relaxant and Atropine for prevention of bradycardia was uesd in all patients. Duration of seizure and recovery; changes in hemodynamic status including heart rate (HR) and mean arterial pressure (MAP); and amount of charge for ECT were recorded for each subject.
Results: Mean of seizure duration in Thiopental, Propofol, and Etomidate groups were 43.72±11.81, 35.74±10.58 and 45.81±17.26 seconds, respectively (P<0.05). Amount of charge for ECT in 3 sessions of treatment and changes of HR were not different between the 3 groups. Changes of MAP in the Propofol group was significantly less than other two groups (P<0.05). Recovery time following ECT was the least in Etomidate group in comparison with Thiopental and Propofol (P<0.05).
Conclusion: Ethomidate and Thiopental had the same effect on increasing seizure duration. However, due to the significant reduction in recovery time compared with Thiopental, Ethomidate may be considered as the best choice.

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Background and Objective: Streptomyces are gram-positive and aerobic bacterial strains that are isolated from different sources. Streptomyces have the ability to produce secondary metabolites and biologically active substances and are therefore very important in the field of biocontrol. Urate oxidase is a microbial enzyme product that can be extracted from a variety of sources, including streptomycin. In the present study, cloning of the urate oxidase gene isolated from seawater streptomycosis was performed in Escherichia coli Origami bacteria.
Methods: In this descriptive study, a total of 60 water and sediment samples were collected from different depths of the Caspian Sea coast in Mazandaran province, Iran. The Geram, staining methyl red, VP, citrate, starch hydrolysis, casein hydrolysis, nitrate reduction, oxidase and catalase tests were performed to identify and isolate Streptomyces. The urate oxidase gene was cloned using the T-A cloning method using the PTG-19 vector inside the host of Escherichia coli Origami. The expression of cloned genes in recombinant colonies was investigated by Real-Time PCR. The phylogenetic tree was drawn using clustalX and Mega5 software.
Results: Screening of marine water samples identified 12 isolated streptomyces, all of which had the urate oxidase gene. The expression of urate oxidase gene in Escherichia coli Origami was confirmed by Real-Time PCR. The results of phylogenetic studies identified some close relatives of Streptomyces as candidates for subsequent studies.
Conclusion: Streptococcus bacteria can be considered as a rich source of secondary metabolites with many applications and can be used as a native to produce the enzyme urate oxidase. By using different cloning hosts and examining optimal production conditions, this strain can be a candidate for future studies to develop antimicrobial drugs and compounds.

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Background and Objective: Pseudomonas aeruginosa is an opportunistic pathogen that is a major cause of mortality in immunocompromised patients. One of the most important mechanisms of resistance of this bacterium is biofilm formation. The aim of this study was done to determine the Effect of Morin on Expression of Biofilm Gene of Pseudomonas aeruginosa Isolated from burn wounds by Real time PCR.
Methods: In this descriptive-analytic study 60 sample were collected from burn wounds of patients admitted to the hospitals in Tehran, Iran. Samples were identified by using biochemical methods. The DNA of the isolates was extracted and then antimicrobial activity of morin analyzed by microbroth dilution assay. The presence of biofilm production genes was investigated by PCR. Finally, the expression of lasI gene in combination with Sub-MIC concentration of morin in biofilm-producing bacteria was evaluated using Real time PCR.
Results: From 60 samples that analyzed by Multiplex-PCR, 12 (20%) Pseudomonas aeruginosa strains were isolated in which 12 isolates (100%) were carried lasI and lasR, genes, respectively. 3 isolates (25%) were carried rhlI gene. Sub-MIC concentration of morin in biofilm-producing bacteria reduced lasI gene expression in Pseudomonas aeruginosa.
Conclusion: Morin has significant efficacy on Pseudomonas aeruginosa and could be a good alternative for treatment of antibiotic resistant isolates.

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Background and Objective: Streptococci are Gram-positive and anaerobic bacteria that are isolated from different sources. These bacteria are capable of producing superantigens, toxins, and biologically-active substances and are therefore very important in the field of infectious disease. Streptococcal pyrogenic exotoxins A (speA) is produced by various bacteria, including Streptococcus dysgalactiae. This study aimed at the isolation, cloning, and production of speA from streptococci from the skin of psoriasis patients.
Methods: In this descriptive-laboratory study, samples were taken from 60 psoriasis patients. S. dysgalactiae isolated were identified by different tests. The speA gene was cloned by the TA cloning method using PTG-19 vector into the Escherichia coli X11 blue as host. Expression of the cloned gene in recombinant colonies was evaluated by SDS-PAGE.
Results: Screening of white recombinant colonies confirmed the presence of speA genes. Expression of the speA gene in E. coli X11 blue was confirmed by SDS-PAGE.
Conclusion: Streptococcus superantigens can be considered as a rich source of vaccine production for different infections caused by these bacteria. By utilizing different cloning hosts and investigating optimal production conditions, S. dysgalactiae could be a candidate for future studies on vaccine production.
 

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The visual processing disorder is broadly observed among individuals with autism. This study was conducted to develop an integrated rehabilitation program based on vibroacoustics and virtual reality and to assess its effectiveness on the visual processing of autistic children. This experimental case report was conducted using an Aberrant Behavior Checklist (ABC) design on 5 children with autism referred to Zehnara Rehabilitation Clinic in the second half months of 2021. First, the integrated program was implemented for ten 30-minute sessions on 2 subjects randomly selected from among the samples. After determining the program validity, 3 more subjects were entered into the study. The sensory profile questionnaire-2 was used. The questionnaires were filled out at the baseline stage, at the end of each intervention session, and at the one-month follow-up stage. The visual analysis, the percentage of recovery, the percentage of non-overlapping data (PND), and the percentage of overlapping data (POD) were used for data analysis. The implemented intervention was evaluated to be effective for all five subjects so that for Subjects No. 1, 2, 3, 4, and 5, the PND rates were obtained to be 90%, 90%, 70%, 100%, and 90%, respectively. The results of this study demonstrated that the integrated sensory rehabilitation program could be used to improve the visual processing of children with autism.