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Faghihi M.,Tehran University of Medical Sciences | Alizadeh A.M.,Cancer Institute of Iran | Khori V.,Golestan University of Medical Sciences | Latifpour M.,Tehran University of Medical Sciences | Khodayari S.,Islamic Azad University at Tehran Medical
Peptides | Year: 2012

Ischemia-reperfusion injury is a common complication of heart disease that is the leading cause of death worldwide. Here, we plan to elucidate oxytocin cardioprotection effects against ischemia-reperfusion via nitric oxide (NO), reactive oxygen species (ROS), and protein kinase C (PKC) in anesthetized rat preconditioned myocardium. Forty-eight Sprague-Dawley rats were equally divided into eight groups. All animals were subjected to 25 min ischemia and 120 min reperfusion. Oxytocin (OT), L-NAME (LNA, a nitric oxide synthase inhibitor), chelerythrine (CHE, a PKC enzyme inhibitor), and N-acetylcysteine (NAC, a ROS scavenger) were used prior to ischemia. Results showed that mean arterial pressure significantly reduced during the first 10 min of ischemia and reperfusion in IR, LNA, CHE, and NAC groups (p < 0.05). OT prevented mean arterial pressure decline during early phase of ischemia and reperfusion. Cardioprotective effects of OT in infarct size, plasma levels of creatine kinase-MB and lactate dehydrogenase, severity and incidence of ventricular arrhythmias were abolished by L-NAME, chelerythrine, and N-acetylcysteine (p < 0.05). The present study showed that OT pretreatment reduces myocardial infarct size and ventricular arrhythmias, and improves mean arterial pressure via NO production, PKC activation, and ROS balance. These findings provide new insight into therapeutic strategies for ischemic heart disease. © 2012 Elsevier Inc. Source

Afsharfard A.,Shahid Beheshti University of Medical Sciences | Mozaffar M.,Shahid Beheshti University of Medical Sciences | Orang E.,Islamic Azad University at Tehran Medical | Tahmasbpour E.,Islamic Azad University at Sari
Asian Pacific Journal of Cancer Prevention | Year: 2013

Background:Breast cancer (BC) is the top cancer among women worldwide and the most frequent malignancy among Iranian women over the past few decades. The increasing trend and high mortality rate of BC in the developing world necessitates studies concentrating on its characteristics in countries in Asia. The current study focused on clinical and histopathological features of BC among Iranian females. Materials and Methods: This retrospective study involved 714 Iranian patients with histopathologically proven BC undergoing resection of primary tumours and axillary clearance. Demographic, clinical and histopathological data were obtained and studied between ten year age groups (=40 years, 41-50 years, 51-60 years, 61-70 years, and =71 years) in four chronologic phases from 1994-2009. Results: Mean age of patients was 49.4±13.1 years. Most of cases (33.2%) were in 41-50 group. Mean size of primary tumors was 3.94±2.47 cm and 87.1% of cases had infiltrative ductal carcinoma. Modified radical mastectomy was the most common method of surgery carried out (48.8%). Some 57.1% of tumors were in pT2 and tumor size decreased significantly during the period (p<0.05). The most common BC stage was llla (27%). Lower BC stages (0 and 1) constituted 13.9% of the diagnosed tumors. Our series of patients aged =40 had larger tumors (mean 4.73±3.02 cm) compared to older age groups (p=0.003). Lower stages (0 and I) were more frequent among the oldest patients while nearly 50% of patients aged =40 had tumor stage III. We also observed a significant decreasing trend in the mean LN count (p<0.05) and blood vessel invasion (p=0.023) from younger to older age groups. Conclusions: More aggressive disease for younger age groups, earlier peak incidence age and high rate of advanced BC at the time of diagnosis among Iranian women, were the main findings of this study. Source

Abassi P.,Islamic Azad University at Tehran | Abassi F.,Islamic Azad University at Tehran | Yari F.,Islamic Azad University at Tehran | Hashemi M.,Islamic Azad University at Tehran Medical | And 2 more authors.
Journal of Photochemistry and Photobiology B: Biology | Year: 2013

Sulforaphane; [1-isothiocyanato-4-(methylsulfinyl) butane], (SFN) is an isothiocyanate derived from glucoraphanin present in cruciferous vegetables and has a variety of potential chemopreventive actions. This study was designed to examine the interaction of sulforaphane with HSA and BSA. FTIR, UV-Vis spectroscopic methods as well as molecular modeling were used to determine the drug binding mode, binding constant and the effect of drug complexation on serum albumins stability and conformation. Structural analysis showed that SFN bind HSA and BSA via polypeptide polar groups with overall binding constants of KSFN-HSA = 6.54 × 104 and KSFN-BSA = 8.55 × 104 M-1. HSA and BSA conformations were altered by a major reduction of α-helix upon SFN interaction. These results suggest that serum albumins might act as carrier proteins for SFN in delivering them to target tissues. © 2013 Elsevier B.V. All rights reserved. Source

Hosseini-Moghaddam S.,University of Toronto | Hosseini-Moghaddam S.,Shahid Beheshti University of Medical Sciences | Iran-Pour E.,Islamic Azad University at Tehran Medical | Rotstein C.,University of Toronto | And 4 more authors.
Reviews in Medical Virology | Year: 2012

Chronic hepatitis C virus (HCV) infection which is often a silent disease has resulted in a global epidemic. The diagnosis of hepatitis C virus often requires confirmation with molecular techniques such as the polymerase chain reaction for detection of HCV RNA. Following laboratory confirmation of the diagnosis, molecular techniques are routinely used to monitor HCV RNA levels, particularly in those undergoing treatment. Unfortunately, molecular tests are relatively expensive and their cost may be prohibitive in the developing world. Several studies have investigated the applicability of the hepatitis C core Ag (HCVcAg), as a substitute for measuring HCV RNA levels. In this review, we provide an overview of the major findings of these studies focused on the utility of measuring HCVcAg antigen levels in the clinical setting. Overall, measuring HCVcAg levels is associated with several advantages and disadvantages. It may be useful in different clinical settings for monitoring HCV patients after obtaining an initial baseline HCV RNA result. © 2011 John Wiley & Sons, Ltd. Source

Hashemi M.,Islamic Azad University at Tehran Medical | Pooladi M.,Islamic Azad University at Tehran | Abad S.K.R.,Islamic Azad University at Tehran
Journal of Cancer Research and Therapeutics | Year: 2014

Objective: Angiogenesis performs a critical role in the development of cancer. Angiogenesis research is a cutting-edge field in cancer research. Proteomics is a powerful tool in identifying multiple proteins that are altered following a neuropharacological intervention in a disease of the central nervous system. Diagnostic oncoproteomics is the application of proteomic techniques for the diagnosis of malignancies. Materials and Methods: We extracted proteins of tumor and normal brain tissues and then evaluated the protein purity by Bradford test and spectrophotometery method. In this study, we separated proteins by two-dimensional (2D) gel electrophoresis method and the spots were then analyzed and compared using statistical data and specific software, after providing three-dimensional images of spots alteration. Spots were identified by pH isoelectric, molecular weights, and data banks. Results: Simple statistical test were used to establish a putative hierarchy in which the change in protein level were ranked according a cutoff point with P < 0.05. Apolipoprotein A1 (apo A1) protein and albumin were consistently upregulated in astrocytoma brain tumors. Conclusion: The vascular microenvironment of glioma play a major role in determining the pathophysiological character is tics of the tumor. apo A1 and albumin are very significant due to their functional consequences in glioma tumor growth, migration and angiogenesis. Source

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