Showing 30 results for EA
Jila Yavarian , Nazanin Zahra Shafiei Jandaghi, Farhad Rezeai , Talat Mokhtari Azad,
Volume 72, Issue 1 (April 2014)
Abstract
Background: Influenza viruses are one of the most important etiological agents of res-piratory disease in humans and cause epidemics and pandemics with substantial mor-bidity and mortality worldwide. Vaccination and antiviral treatments are the sole and essential way for the prevention and control of influenza infection. During an influenza epidemic before the production of effective vaccine, antiviral treatments are the first step for the prevention and treatment of influenza infection. Adamantanes and neuraminidase inhibitors are influenza antiviral drugs. Because of the increase of drug resistant viruses, the aim of this study was the evaluation of the antiviral drug resistance in influenza A/H3N2 viruses from 2005-2013 in Iran.
Methods: In this study 50 influenza A/H3N2 viruses isolated in cell culture were tested. All samples were subjected to M and NA gene sequencing at the National Influenza Center, School of Public Health, Tehran University of Medical Sciences. RNA was ex-tracted from 200 µl of cell culture supernatants using the Roche high pure viral nucleic acid kit. RT-PCR with the Qiagen one step RT-PCR kit was done. The expected size of the PCR products were analyzed by electrophoresis using 1% agarose gels. The PCR products were sequenced for finding the drug resistant mutants.
Results: All influenza A/H3N2 viruses except four viruses circulating during 2005-2006 had Ser31Asn mutation at M2 channel protein. In the analysis of neuraminidase gene none of the A/H3N2 viruses had K292R, E119V and N294S mutations responsible for drug resistant strains.
Conclusion: This study showed circulating A/H3N2 viruses was resistant to adaman-tanes but susceptible to neuraminidase inhibitors. The national data analyzed in this re-search may help increase knowledge about influenza virus antiviral drug resistance, which is a global public health concern. The authors suggested continuing this study and also the investigation of antiviral drug resistance of influenza A/H1N1 and B viruses.
Ali Maleki , Mahnaz Ashjaearvan , Ashraf Karimi ,
Volume 73, Issue 1 (April 2015)
Abstract
Background: The effects of consumption of nutrients on coronary artery disease (CAD) are widely observed. The aim of this study is to assess the exclusive Iranian dietary pattern on coronary artery diseases (CAD) and its risk factors. Methods: In this description-cross sectional study, 801 inhabitants of Borujerd City were included by random stratification method and a questionnaire regarding micro- and macronutrients for subjects over 35 years old from March 2011 to February 2012 was filed out. Of all the subjects consent to participate were prepared by volunteers. The complete description and a standard questionnaire to record demographic and socioeconomic status of people were taken. The prevalence of coronary artery disease and its risk factors determined Based on rose questionnaire and Monica questionnaire respectively. Results: In this study mean age of the subjects were 54.8±1.2 years, 388 male and 413 female. There was no meaningful relation between red meat consumption and coronary artery disease (P= 0.117). Nut consumption was higher in patients with CAD (P= 0.028). Use of fresh and cooked vegetables, dried fruit, animal oils cakes, french fries and some dairies are correlated with CAD (P< 0.05). However, artificially flavored soda in contrast to ordinary soda was not associated with coronary artery disease. Conclusion: Although there are some differences between dietary pattern in patient with coronary artery disease, nutritional attitudes are not significantly different in normal and CAD patients. However, according to the importance of diet in CAD, balancing these attitudes should be on the educational system high priority.
Azadeh Meamarian , Shayesteh Ashrafi Esfahani , Shahrokh Mehrpisheh , Atoosa Mahdavi Saeedi , Kamran Aghakhani ,
Volume 73, Issue 3 (June 2015)
Abstract
Background: The relationship of the base of appendix to the cecum remains constant, whereas the tip can be found in a retrocecal, pelvic, subcecal, preileal, or right pericolic position. These anatomic considerations have significant clinical importance in the context of acute appendicitis. The knowledge about the correct anatomical position of appendix may facilitate in generating an accurate diagnosis of appendicitis as well as assist in achieving a better prognosis and early treatment. The present study aimed to determine the anatomical location of the appendix in Iranian cadavers.
Methods: This descriptive cross-sectional study was conducted on 200 cadavers who were referred to the Forensic Center of Tehran from March to September 2013. The data including age, sex, weight, and appendix length and position were collected and analyzed using SPSS software, version 16 (SPSS, Inc., Chicago, IL, USA).
Results: In the present study, 200 cadavers were evaluated accidentally, of which 173 (86.5%) were males and 26 (13%) were females, and the mean age was 39.96 years±16.31 (SD). The mean wall thickness of the appendix was 9.78 cm±16.31 (SD). The mean appendix length was 9.86 cm±1.79 (SD) in men and 9.30 cm±1.56 (SD) in women. The appendix height was long in 20 cadavers (10%), short in 3 cadavers (1.5%), and moderate in 177 cadavers (88.55%) cadavers. The appendix position was posterior in 120 (60%), ectopic in 32 (16%), and pelvic in 48 (24%) cadavers.
Conclusion: Majority of appendices examined in the present study were positioned at the posterior (Retrocecal) of pelvis. According to different positions of appendices in different populations and different races, the knowledge of appendix position in various populations is necessary for early diagnosis and treatment and fewer complications for related disease.
Malihea Khaleghian , Issa Jahanzad , Abbas Shakoori , Neda Zargari, Maryam Mohamadi , Cyrus Azimi ,
Volume 73, Issue 4 (July 2015)
Abstract
Background: The incidence rate of gastric cancer in Western countries has shown a remarkable decline in recent years although it is still the almost common cancer between men in Iran. The proto-oncogene MYC, located at 8q24.1, regulates almost 15% of human genes and is activated in 20% of all tumors. MYC amplification and overexpression of its protein product are observed in 15-30% of gastric neoplasia. The objective of this study was to find the preference of CISH or IHC in the diagnosis and prognosis of gastric cancer.
Methods: In this cross-sectional investigation, 102 paraffin blocks samples of Iranian patients with gastric cancers were studied. All the patients had undergone primary surgical resection at the Cancer Institute Hospital, Tehran University of Medical Sciences from 1987 to 1993. CISH and IHC techniques were applied to the samples. CISH was carried out on 3-µm-thick tissue sections and with a ZytoDot CISH Implementation Kit (ZytoVision GmbH, Germany). IHC was down using the HRP method with the monoclonal antibody. A universal peroxidase-conjugated secondary antibody kit was used for the detection system. All samples were gastric adenocarcinoma and were selected randomly.
Results: Our data revealed that both diffuse and intestinal types of gastric cancer occurred significantly in men more than women. Our results showed an indication of some correlation between grades and CISH results, although the difference was not significant. Our data also showed that CISH+ patients (43.1%) were more frequent in comparison with IHC+ patients (14.7%). There was a correlation between CISH and IHC. This result revealed that there was a significant difference between grades and IHC. There was also no statistically significant difference between CISH amplification in diffuse and intestinal types.
Conclusion: Our conclusion is that for the treatment, management of stomach cancer, and monitoring of progress and prognosis of the tumor that is almost important for patients and clinicians, CISH test is a better and feasible to IHC test, with regards to sensitivity and specificity.
Sanambar Sadighi, Hosein Kamranzadeh, Easa Jahanzad , Saghi Vaziri ,
Volume 73, Issue 8 (November 2015)
Abstract
Background: Breast cancer is the most common cancer in women around the world. It has been known for over a century that androgens and androgen receptor (AR) play a role in normal and neoplastic breast cells. The aim of this study was to determined the AR expression on tumor cells and its correlation with other prognostic and predictive factors as well as contribution of AR in patients overall survival (OS) and disease- free survival (DFS). Methods: This retrospective cross-sectional study performed on 189 patients who referred to Medical Oncology Ward of Cancer Institute, Tehran University of Medical Sciences, from April 2007 to February 2010. We performed an immunohistochemistry study for AR (AR441 clone, Dako, Germany) (10% cut-off point) and Ki-67 MIB-1 clone, Dako, Germany) on paraffin embedded blocks. Other data were extracted from patients’ documents. Results: Overall, AR expression was 49.1%. Mean age of the patients with and without AR was 47.86 and 48.49 years, respectively. AR positive tumors presented more in stage I/II than III/IV (P=0.02) and AR were more positive for estrogen receptor positive, lower grade of tumor (grade I/II versus III) and lower Ki-67 (P=0.01). AR positivity had neither correlation with progesterone receptor, HER2/neu, P53 expression or menopausal status. OS and DFS were higher in AR positive patients but did not reach statistical significance. In triple-negative breast cancer (TNBC) group, 25% of tumors showed AR expression. AR had non-significant positive correlation with OS in TNBC cancer patients. OS and DFS had significant statistic positive correlation with ER, PR and stage regardless of AR status. Conclusion: Based on this study, although androgen receptor expression showed correlation with other prognostic factors for survival in patients, we didn’t find statistically significant independent relationship between AR and overall survival in patients. As far as there isn’t any targeted therapy for triple-negative breast cancer (TNBC), prospective basic and clinical studies regarding AR inhibitors in the treatment of TNBC seems to be logical and valuable.
Farshid Farhan , Cyrus Azimi , Majid Mahmoodi , Mohammad-Ali Mohagheghi , Farideh Farzanfar , Azam Noor-Mohammadi, Malihea Khaleghian , Abbas Jafari , Mehrangiz Ghaem-Maghami , Kouros Divsalar ,
Volume 74, Issue 1 (April 2016)
Abstract
Background: It is reported that high frequency of chromosomal aberrations in peripheral blood lymphocytes of individuals is a marker of cancer predisposition. The aim of this study was to investigate the in vitro frequency of chromosomal damage in lymphocytes of patients with head and neck cancer against gamma irradiation compared with those in healthy individuals.
Methods: In a case and control study, peripheral blood lymphocytes of 101 patients with head and neck cancer were collected before the onset of radiotherapy. Lymphocytes of 40 healthy individuals were also collected as controls. Head and neck cancer patients and the control group were consecutively recruited between April 2012 and February 2015 from Clinics of Cancer Institute, Imam Khomeini Hospital, Tehran, Iran. Lymphocytes of patients or control group were cultured and exposed to gamma radiation in G2- and G0- phase of the cell cycle. The induced chromosomal aberrations such as chromosome and chromatid breakages, chromosome and chromatid gaps, chromatid exchanges and micronuclei were scored in one-hundred metaphase cells of each individual. The mean of each chromosomal aberration was compared in patient and control groups. Early and late tissue reactions were scored during radiotherapy treatment or thereafter.
Results: There was no significant difference in demographic characterization between the two study groups. The frequency of radiation- induced G2 aberrations in lymphocytes of patients was significantly higher than in those of healthy donors (P= 0.001 for chromosomal breaks). The frequency of radiation-induced micronuclei in G0 assay was also higher in patients than in those in controls (P= 0.05). The results also indicate that there is no correlation between the two assays. No significant correlation was also observed between aberration frequencies in lymphocytes and the degree of both early and late normal tissue reactions.
Conclusion: The results indicate that the in vitro chromosomal radiosensitivity of peripheral blood lymphocytes of patients with head and neck cancer against gamma irradiation was significantly higher than that in healthy individuals.
Zahra Raeisi , Pantea Ramezannezad , Marzieh Ahmadzade , Shahram Tarahomi ,
Volume 75, Issue 1 (April 2017)
Abstract
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Background: One of the today most common and incurable diseases that is associated with central neural system is ‘MS’ disease. Multiple sclerosis (MS) is a demyelinating disease in which the insulating covers of nerve cells in the brain and spinal cord are damaged. In this disease become apparent a wide spectrum of symptoms such as lose muscles control and their coordination and vision derangement. The goal of this research is to consider to two problems: 1- Recognition of effective clinical symptoms on MS disease and 2- Considering levels of effectiveness of age, sex and education levels factors on MS disease and association between these factors according to verity of categories of this disease.
Methods: Data mining science in medicine is worthy of attention with main application in diagnosis, therapy and prognosis, respectively high volume of collected datum. The data that were used in this article are about patients of Chaharmahal and Bakhtiari Province and collected by cure assistance. In this paper classification and association methods in software engineering field are used. Classification is a general process related to categorization, the process in which ideas and objects are recognized, differentiated, and understood. Association rules are created by analyzing data for frequent if/then patterns and using the criteria support and confidence to identify the most important relationships.
Results: In consideration of first problem in this paper, concluded vision-clinical symptoms are the most effective symptoms and in consideration of second problem, concluded that from 584 records, women affected four times more than men. In other word 70% of MS patients with high graduate are in relapsing-remitting category and 62.5% of MS patients are 20-40 years old.
Conclusion: Some of symptoms are quite temporary and transitory and are ignored by people. Awareness of clinical-symptoms prevalence manner can be warning for people before starting critical cycle of illness. This would cause early diagnosis, effective therapy and even prevention of disease progress, respectively to MS chronicity.
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Malihe Hasanzadeh , Mina Baradaran Khalkhale , Akram Behroznea, Leila Musavi ,
Volume 75, Issue 12 (March 2018)
Abstract
Background: Graves' disease is the most common cause (85% of all cases) of thyrotoxicosis in women in childbearing age. Many of the symptoms are similar to hyper-metabolic status during pregnancy. The cause of the disease is autoantibodies that stimulate the thyroid-stimulating hormone (TSH) receptor. Hyperthyroidism is uncommon in pregnancy and its prevalence is 0.1-%0.4. In this paper we introduce a patient who was admitted with a primary diagnosis of pulmonary embolism and treatment with final diagnosis of thyroid storm and was discharged with good condition.
Case presentation: In the first pregnancy of a 29-year-old woman with gestation age of 31 weeks was referred to obstetric emergency unit Ghaem Hospital, Mashhad, Iran in March 2015. She had Grave’s disease in her past medical history which was treated with methimazole before pregnancy and propylthiouracil (PTU) during pregnancy. In admission, she presented with tachycardia and tachypnea and hypertension and lower extremity edema. During pregnancy, she used propantheline instead of propylthiouracil due to pharmacy mistake. She admitted in Intensive care unit. After rule out of pulmonary embolism, ultrasonography showed a fetus with 30 weeks of gestational age with an approximate weight of 1680 grams. The amniotic fluid was reduced. She was treated with thyroid storm diagnosis due to a medication error. In serial obstetric visits fetal heart rate was not detected. Due to the fetal death, the pregnancy was terminated. Hyperthyroid therapy continued with PTU after delivery. She was discharged with a good general condition.
Conclusion: Despite the rarity of thyroid storm during pregnancy, in the event of unstable hemodynamic condition and cardiac dysfunction in pregnant women, rule out of thyroid disorders should be considered. Clinician should be paid attention to past drug history and underline disease of patient.
Mansour Bahardoust, Shahram Agah , Arash Sarveazad , Amir Hossein Faghihi , Asrin Babahajian , Seyed Ali Hashemi Kiapay , Farnaz Farsi , Marjan Mokhtare,
Volume 76, Issue 3 (June 2018)
Abstract
Background: One of the most important causes of chronic liver disease is hepatitis C virus (HCV), which causes liver cirrhosis and hepatocellular carcinoma. To control the prevalence of the disease, knowledge and information in risk factor of HCV are required. The aim of this study was to compare the risk factors of infection between HCV patients with genotypes 1a and 3a.
Methods: This is an observational analytical study. HCV patients who referred to the clinic of hepatology, Rasoul-e-Akram University Hospital from July 2015 to July 2017, were assigned to the genotype 1a and 3a. Demographic (age, sex, family history), clinical (cirrhosis, hepatocellular carcinoma) and laboratory data, history of intravenous drug and alcohol usage, and history of imprisonment were gathered and compared between two groups. All the patients completed the informed consent form. Data analysis was performed by SPSS software, version 22 (IBM SPSS, Armonk, NY, USA). P value less than 0.05 was considered statistically significant.
Results: Overall, 97 HCV patients were included in this study. Mean age was 45±12 years and 78 (80%) of patients were male. Among them, 58 (60%) and 39 (40%) had genotype 1a and 3a. respectively. History of injection drug usage was recorded in 34/39 (87%) of patients with genotype 3a, and significantly higher in genotype 3a as compared to genotype 1a [OR adj: 3.1, CI (1.3-6.2)]. Also, in this study, genotype 3a was significantly recorded in younger patients [OR adj: 1.7, CI (1.2-4.1)]. However, cirrhosis and hepatocellular carcinoma was more common in patients with genotype 1a as compared to genotype 3a [OR adj: 2.05, CI (1.6-5.4) and OR adj: 2.8, CI (1.3-5.7)] respectively.
Conclusion: According to the results of this study, hepatitis C virus transmission risk factors differed in genotypes 3a and 1a. Genotype 3a is found among young patients with a history of intravenous drug usage and genotype 1a in patients with cirrhosis and hepatocellular carcinoma.
Firouzeh Moeinzadeh, Mohammad Hossein Rouhani , Mojgan Mortazavi , Mohammad Sattari,
Volume 79, Issue 6 (September 2021)
Abstract
Background: Millions of deaths occur around the world each year due to lack of access to appropriate treatment for chronic kidney disease patients. Given the importance and mortality rate of this disease, early and low-cost prediction is very important. The researchers intend to identify chronic kidney disease through the optimal combination of techniques used in different stages of data mining.
Methods: This cross-sectional research was conducted from February 1999 to May 2014. The used data set included 4145 samples and 32 attributes, where Each sample corresponded to a patient and each attribute corresponded to the demographic and clinical traits. There were several eligibility criteria for the patients for clinical testing. These criteria for the clinical testing included having 18 years of age and older, living in Isfahan city, willing to participate in the study, lack of fever and cold during laboratory tests, no strenuous exercise 48 hours before laboratory tests, and fasting. Individuals who had an incomplete questionnaire or were unwilling to perform accurate tests were excluded from the study. The target variable is kidney disease, the values of which include sick and healthy. Four data mining techniques have been used in the dataset. These techniques are support vector machine (SVM), random forest (RF), artificial neural network (ANN) and Chi-square automatic interaction detection (CHAID).
Results: Accuracy is the evaluation criteria for comparing available data mining methods. Based on the accuracy criterion, the support vector machine performed better than other techniques (random forest, neural network and CHAID). The best rule is that if the patients consume salt in their diet, their age is between 50 and 69, and they have diabetes. they are 82% more likely to develop chronic kidney disease.
Conclusion: The derived rules also showed that if we use salt and we have diabetes, we are at the risk of developing chronic kidney disease. Moreover, having diabetes can increase the risk of mortality in chronic kidney patients. Aged people should also be more careful about getting chronic kidney disease. Because, they are more prone to develop chronic kidney disease.
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