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Mahdavi SR, Tavakol A, Sanei M, Molana SH, Arbabi F, Rostami A, Barimani S. Use of artificial neural network for pretreatment verification of intensity modulation radiation therapy fields. Br J Radiol 2019; 92:20190355. [PMID: 31317765 PMCID: PMC6774604 DOI: 10.1259/bjr.20190355] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 06/22/2019] [Accepted: 07/10/2019] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE The accuracy of dose delivery for intensity modulated radiotherapy (IMRT) treatments should be determined by an accurate quality assurance procedure. In this work, we used artificial neural networks (ANNs) as an application for the pre-treatment dose verification of IMRT fields based two-dimensional-fluence maps acquired by an electronic portal imaging device (EPID). METHODS The ANN must be trained and validated before use for the pretreatment dose verification. Hence, 60 EPID fluence maps of the anteroposterior prostate and nasopharynx IMRT fields were used as an input for the ANN (feed forward type), and a dose map of those fluence maps that were acquired by two-dimensional Array Seven29TM as an output for the ANN. RESULTS After the training and validation of the neural network, the analysis of 20 IMRT anteroposterior fields showed excellent agreement between the ANN output and the dose map predicted by the treatment planning system. The average overall global and local γ field pass rate was greater than 90% for the prostate and nasopharynx fields, with the 2 mm/3% criteria. CONCLUSION The results indicated that the ANN can be used as a fast and powerful tool for pretreatment dose verification, based on an EPID fluence map. ADVANCES IN KNOWLEDGE In this study, ANN is proposed for EPID based dose validation of IMRT fields. The proposed method has good accuracy and high speed in response to problems. Neural network show to be low price and precise method for IMRT fields verification.
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Affiliation(s)
- Seied Rabie Mahdavi
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Asieh Tavakol
- Department of Radiation Oncology, Roshana Cancer Institute, Tehran, Iran
| | - Mastaneh Sanei
- Department of Radiation Oncology, Iran University of Medical Sciences, Tehran, Iran
| | - Seyed Hadi Molana
- Department of Radiation Oncology, Aja University of Medical Sciences, Tehran, Iran
| | - Farshid Arbabi
- Department of Radiation Oncology, Roshana Cancer Institute, Tehran, Iran
| | - Aram Rostami
- Department of Medical Physics, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Sohrab Barimani
- Department of Biomedical Engineering, Amirkabir University of Technology, Tehran, Iran
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Zakariaee SS, Oghabian MA, Firouznia K, Sharifi G, Arbabi F, Samiei F. Assessment of the Agreement between Cerebral Hemodynamic Indices Quantified Using Dynamic Susceptibility Contrast and Dynamic Contrast-enhanced Perfusion Magnetic Resonance Imagings. J Clin Imaging Sci 2018; 8:2. [PMID: 29441225 PMCID: PMC5801598 DOI: 10.4103/jcis.jcis_74_17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 12/11/2017] [Indexed: 01/05/2023] Open
Abstract
Background: Brain tumor is one of the most common tumors. A successful treatment might be achieved with an early identification. Pathological investigation as the gold standard method for tumor identification has some limitations. Noninvasive assessment of tumor specifications may be possible using perfusion-weighted magnetic resonance imaging (MRI). Cerebral blood volume (CBV) and cerebral blood flow (CBF) could be calculated based on dynamic contrast-enhanced MRI (DCE-MRI) in addition to dynamic susceptibility contrast MRI (DSC-MRI) modality. Each category of the cerebral hemodynamic and permeability indices revealed the specific tumor characteristics and their collection could help for better identification of the tumor. Some mathematical methods were developed to determine both cerebral hemodynamic and permeability indices based on a single-dose DCE perfusion MRI. There are only a few studies available on the comparison of DSC- and DCE-derived cerebral hemodynamic indices such as CBF and CBV. Aim: The objective of the study was to validate first-pass perfusion parameters derived from T1-based DCE method in comparison to the routine T2*-based DSC protocol. Materials and Methods: Twenty-nine patients with brain tumor underwent DCE- and DSC-MRIs to evaluate the agreement between DSC- and DCE-derived cerebral hemodynamic parameters. Agreement between DSC- and DCE-derived cerebral hemodynamic indices was determined using the statistical method described by Bland and Altman. The reliability between DSC- and DCE-derived cerebral hemodynamic indices was measured using the intraclass correlation analysis. Results: The achieved magnitudes for DCE-derived CBV (gray matter [GM]: 5.01 ± 1.40 mL/100 g vs. white matter [WM]: 1.84 ± 0.74 mL/100 g) and DCE-derived CBF (GM: 60.53 ± 12.70 mL/100 g/min vs. WM: 32.00 ± 6.00 mL/100 g/min) were in good agreement with other studies. The intraclass correlation coefficients showed that the cerebral hemodynamic indices could accurately be estimated based on the DCE-MRI using a single-compartment model (>0.87), and DCE-derived cerebral hemodynamic indices are significantly similar to the magnitudes achieved based on the DSC-MRI (P < 0.001). Furthermore, an acceptable agreement was observed between DSC- and DCE-derived cerebral hemodynamic indices. Conclusion: Based on the measurement of the cerebral hemodynamic and blood–brain barrier permeability using DCE-MRI, a more comprehensive collection of the physiological parameters cloud be achieved for tumor evaluations.
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Affiliation(s)
- Seyed Salman Zakariaee
- Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mohammad Ali Oghabian
- Department of Medical Physics and Biomedical Engineering, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Department of Research Center For Molecular and Cellular Imaging, Neuroimaging and Analysis Group, Tehran University of Medical Sciences, Tehran, Iran
| | - Kavous Firouznia
- Department of Radiology, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Guive Sharifi
- Department of Neurosurgery, Faculty of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farshid Arbabi
- Department of Radiotherapy, Faculty of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Farhad Samiei
- Department of Radiotherapy, Faculty of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Ramezani S, Hadjighassem M, Vousooghi N, Parvaresh M, Arbabi F, Amini N, Joghataei MT. The Role of Protein Kinase B Signaling Pathway in Anti-Cancer Effect of Rolipram on Glioblastoma Multiforme: An In Vitro Study. Basic Clin Neurosci 2017; 8:325-336. [PMID: 29158883 PMCID: PMC5683690 DOI: 10.18869/nirp.bcn.8.4.325] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
Introduction: The mechanism of putative cytotoxicity of 4-[3-(cyclopentyloxy)-4-methoxyphenyl]-2-pyrrolidone (rolipram), a specific phosphodiesterase-4 (PDE4) inhibitor, on glioblastoma multiforme (GBM) is almost unknown. This study aimed to investigate the role of protein kinase B (Akt) pathway in the cytotoxic effect of rolipram on human GBM U87 MG cell line and Tumor-Initiating Cells (TICs) isolated from patient’s GBM specimen. Methods: TICs were characterized by using flow cytometry and quantitative real-time PCR. The cells were treated with rolipram at inhibitory concentration of 50% (IC50) in the presence or absence of SC79 (4μg/mL), a specific AKT activator, for 48 hours. The cell viability and apoptosis were measured by MTT assay and TUNEL staining, respectively. The relative expression of Phospho-Akt (Ser473), matrix metalloproteinase 2 (MMP2), and vascular endothelial growth factor A (VEGFA) were detected using Western blotting. Results: The findings showed that rolipram could suppress cell viability in both U87MG and TICs, dose-dependently. Interestingly, the rolipram-induced cytotoxicity was significantly reduced in the presence of SC79. Nevertheless, in rolipram-treated cells, the pretreatment with SC79 significantly led to increase in U87 MG cells and TICs apoptosis and decrease in viability of U87 MG cells but not TICs relative to corresponding control. In U87 MG and TICs, rolipram-induced reduction of Phospho-Akt (Ser473) and MMP2 levels were significantly suppressed by SC79. Conclusion: There is a cell type-specific mechanism of anti-proliferative action of rolipram on GBM cells. The reduction of intracellular level of MMP2 but not VEGFA by rolipram is conducted through the inhibition of Akt signal. Rolipram-induced apoptosis is mediated via Akt dependent/independent mechanisms.
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Affiliation(s)
- Sara Ramezani
- Neuroscience Research Center, Department of Neurology, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran.,Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoudreza Hadjighassem
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Brain and Spinal Cord Injury Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nasim Vousooghi
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Iranian National Center for Addiction Studies, Iranian Institute for Reduction of High-Risk Behaviors, Tehran University of Medical Sciences, Tehran, Iran
| | - Mansour Parvaresh
- Department of Neurosurgery, School of Medicine, Iran University of Medical Sciences, Tehran, Iran
| | - Farshid Arbabi
- Department of Oncology, Faculty of Medical Sciences, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Naser Amini
- Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Taghi Joghataei
- Department of Neuroscience, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Cellular and Molecular Research Center, Iran University of Medical Sciences, Tehran, Iran.,Department of Neuroscience, School of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran
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Anvari K, Fazl Ersi M, Etemad-Rezaie H, Nekooie S, Arbabi F, Ganjeifar B, Bidouei F, Nikkhah K, Afarid M, Torabi-Nami M. P21.04 Clinical pathway in glioma management; from NOSC (Neuro-Oncology Scientific Club) meetings to bedside practice. Neuro Oncol 2016. [DOI: 10.1093/neuonc/now188.292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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5
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Taheri M, Hashemi M, Eskandari-Nasab E, Fazaeli A, Arbabi F, Bahrani-Zeidabadi M, Bahari G. Association of –607 C/A Polymorphism of IL-18 Gene (rs1946518) with Breast Cancer Risk in Zahedan, Southeast Iran. Prague Med Rep 2015; 113:217-22. [DOI: 10.14712/23362936.2015.19] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
It is known that interleukin-18 (IL-18) is a proinflammatory cytokine with dual effects on tumor development and progression. It can increase the immune defense against tumor cells. Polymorphisms in the IL-18 genes are known to influence both expression levels and may be associated with outcome of cancers. This study was aimed to find out the possible association of IL-18 polymorphism at position –607 C/A (rs1946518) with breast cancer in a sample of Iranian population. We investigated IL-18 rs1946518 polymorphism on 72 breast cancer patients and 93 cancer free women. Genotyping was done using amplification refractory mutation system-PCR (ARMS-PCR). We found no significant differences between breast cancer patients and control subjects regarding IL-18 rs1946518 polymorphism (χ2=1.78, p=0.411). In conclusion, our finding showed that IL-18 rs1946518 polymorphism was not associated with breast cancer in a sample of Iranian population.
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Kordi Tamandani DM, Hemati S, Davani SK, Arbabi F. Association between promoter methylation and expression of thyroid hormone receptor beta (THRβ) gene in patients with gastric cancer in an Iranian population. J Gastroenterol Hepatol 2015; 30:485-9. [PMID: 25302749 DOI: 10.1111/jgh.12808] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/23/2014] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIM There is evidence that gastric cancer patients suffer from thyroid disorders. However, the relationship between thyroid receptor (TR) expression and gastric cancer remains unknown. The aim of this study was to evaluate the status of promoter methylation and expression of the thyroid hormone receptor beta (THRβ) gene in gastric cancer patients in an Iranian population. METHODS Analysis of THRβ promoter methylation was performed on 85 pairs of formalin-fixed, paraffin-embedded (FFPE) tissue samples as cases and controls via methylation-specific polymerase chain reaction (PCR [MSP]). The samples were obtained from tumors and surrounding healthy tissues from resected gastric cancers. The expression assay was also performed with 25 FFPE tissue pairs (tumor and surrounding healthy tissues of the same individual) using real-time PCR. RESULTS The results of the present study show that there is a statistically significant difference between tumor and adjacent normal tissues regarding promoter methylation status and THRβ expression (P = 0.04 and P = 0.036, respectively). CONCLUSION Therefore, promoter methylation of THRβ may be involved in the development of gastric cancer.
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Omrani M, Hashemi M, Eskandari-Nasab E, Hasani SS, Mashhadi MA, Arbabi F, Taheri M. hsa-mir-499 rs3746444 gene polymorphism is associated with susceptibility to breast cancer in an Iranian population. Biomark Med 2014; 8:259-67. [PMID: 24521023 DOI: 10.2217/bmm.13.118] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
AIM Our study aimed to evaluate the possible association between four miRNA polymorphisms, hsa-miR-146a (rs2910164 G>C), hsa-miR-499 (rs3746444 T>C) and hsa-miRNA-196a2 (rs11614913 C>T and rs185070757 T>G), and susceptibility to breast cancer in an Iranian population. MATERIALS & METHODS In this case-control study we enrolled 236 patients with breast cancer and 203 healthy individuals. Tetra primer amplification refractory mutation system PCR was applied for genotyping the four miRNA SNPs. RESULTS Our study indicated that the hsa-mir-499 rs3746444 CC homozygote increased the risk of breast cancer in the dominant (odds ratio [OR]: 2.42; 95% CI: 1.43-4.09; p = 0.001; CC vs TT) and recessive (OR: 2.48; 95% CI: 1.49-4.13; p = 0.004; CC vs TT+TC) inheritance models tested. In addition, the rs3746444 C allele increased the risk of breast cancer (OR: 1.71; 95% CI: 1.27-2.29; p = 0.0004) in comparison with the T allele. However, distribution of the rs2910164 G>C, rs11614913 C>T and rs185070757 T>G genotypes was not statistically different between cases and controls (p > 0.05). CONCLUSION Our findings demonstrated that the hsa-mir-499 rs3746444 polymorphism is associated with higher risk of developing breast cancer in our population.
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Affiliation(s)
- Mohsen Omrani
- Cellular & Molecular Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
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Jajroudi M, Baniasadi T, Kamkar L, Arbabi F, Sanei M, Ahmadzade M. Prediction of Survival in Thyroid Cancer Using Data Mining Technique. Technol Cancer Res Treat 2014; 13:353-9. [DOI: 10.7785/tcrt.2012.500384] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cancer is the second leading cause of death after cardiovascular diseases in the world. Health professionals are seeking ways for suitable treatment and quality of care in these groups of patients. Survival prediction is important for both physicians and patients in order to choose the best way of management. Artificial Neural Network (ANN) is one of the most efficient data mining methods. This technique is able to evaluate the relationship between different variables spontaneously without any prevalent data. In our study ANN and Logistic Regression were used to predict survival in thyroid cancer and compare these results. SEER (Surveillance, Epidemiology and End Result) data were got from SEER site1. Effective features in thyroid cancer have been selected based on supervision by radiation oncologists and evidence. After data pruning 7706 samples were studied with 16 attributes. Multi Layer Prediction (MLP) was used as the chosen neural network and survival was predicted for 1-, 3- and 5-years. Accuracy, sensitivity and specificity were parameters to evaluate the model. The results of MLP and Logistic Regression models for one year are defined as for 1-year (92.9%, 92.8, 93%), (81.2%, 88.9%, 72.5%), for 3-year as (85.1%, 87.8%, 82.8%), (88.6%, 90.2%, 87.2%) and for 5-year as (86.8%, 96%, 74.3%), (90.7%, 95.9%, 83.7) respectively. According to our results ANN could efficiently represent a suitable method of survival prediction in thyroid cancer patients and the results were comparable with statistical models.
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Affiliation(s)
- M. Jajroudi
- Department of medical Informatics, School of Management and Medical Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - T. Baniasadi
- Department of medical Informatics, School of Management and Medical Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - L. Kamkar
- Department of medical Informatics, School of Management and Medical Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran
| | - F. Arbabi
- Radiation Oncology Assistant Professor, Iran University of Medical Sciences, Zahedan, Iran
| | - M. Sanei
- Radiation Oncology Assistant Professor, Tehran University of Medical Sciences, Tehran, Iran
| | - M. Ahmadzade
- School of Computer Engineering & IT, Shiraz University of Technology, Shiraz, Iran
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Hashemi M, Fazaeli A, Ghavami S, Eskandari-Nasab E, Arbabi F, Mashhadi MA, Taheri M, Chaabane W, Jain MV, Łos MJ. Functional polymorphisms of FAS and FASL gene and risk of breast cancer - pilot study of 134 cases. PLoS One 2013; 8:e53075. [PMID: 23326385 PMCID: PMC3543397 DOI: 10.1371/journal.pone.0053075] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Accepted: 11/23/2012] [Indexed: 01/06/2023] Open
Abstract
Fas/Fas ligand (FasL) system is one of the key apoptotic signaling entities in the extrinsic apoptotic pathway. De-regulation of this pathway, i.e. by mutations may prevent the immune system from the removal of newly-formed tumor cells, and thus lead to tumor formation. The present study investigated the association between −1377 G/A (rs2234767) and −670 A/G (rs1800682) polymorphisms in Fas as well as single nucleotide polymorphisms INV2nt −124 A/G (rs5030772) and −844 C/T (rs763110) in FasL in a sample of Iranian patients with breast cancer. This case-control study was done on 134 breast cancer patients and 152 normal women. Genomic DNA was extracted from whole blood samples. The polymorphisms were determined by using tetra-ARMS-PCR method. There was no significant difference in the genotype distribution of FAS rs2234767 polymorphism between cases and controls. FAS rs1800682, FASL rs5030772, and FASL rs763110 genotypes showed significant associations with an increasing risk of breast cancer (odds ratio OR = 3.18, P = 0.019; OR = 5.08, P = 0.012; OR = 2.40, P = 0.024, respectively). In conclusion, FAS rs2234767 was not associated with breast cancer risk. Though, FAS rs1800682, FASL rs5030772, and FASL rs763110 polymorphisms were associated with the risk of breast cancer in the examined population.
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Affiliation(s)
- Mohammad Hashemi
- Cellular and Molecular Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Science, Zahedan, Iran
| | - Aliakbar Fazaeli
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Science, Zahedan, Iran
| | - Saeid Ghavami
- Biology of Breathing Group, Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada
- Department of Physiology, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Ebrahim Eskandari-Nasab
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Science, Zahedan, Iran
- Department of Internal Medicine, School of Medicine, Zahedan University of Medical Science, Zahedan, Iran
| | - Farshid Arbabi
- Department of Internal Medicine, School of Medicine, Zahedan University of Medical Science, Zahedan, Iran
| | - Mohammad Ali Mashhadi
- Department of Internal Medicine, School of Medicine, Zahedan University of Medical Science, Zahedan, Iran
| | - Mohsen Taheri
- Genetic of Non Communicable Disease Research Center, Zahedan University of Medical Science, Zahedan, Iran
| | - Wiem Chaabane
- Department of Clinical and Experimental Medicine, Integrative Regenerative Med. Center (IGEN), Division of Cell Biology, Linköping University, Linköping, Sweden
- Department of Biology, Faculty of Sciences, University of Tunis, Tunis, Tunisia
| | - Mayur V. Jain
- Department of Clinical and Experimental Medicine, Integrative Regenerative Med. Center (IGEN), Division of Cell Biology, Linköping University, Linköping, Sweden
| | - Marek J. Łos
- Department of Clinical and Experimental Medicine, Integrative Regenerative Med. Center (IGEN), Division of Cell Biology, Linköping University, Linköping, Sweden
- BioApplications Enterprises, Winnipeg, Manitoba, Canada
- * E-mail:
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Hashemi M, Eskandari-Nasab E, Fazaeli A, Taheri M, Rezaei H, Mashhadi M, Arbabi F, Kaykhaei MA, Jahantigh M, Bahari G. Association between polymorphisms of glutathione S-transferase genes (GSTM1, GSTP1 and GSTT1) and breast cancer risk in a sample Iranian population. Biomark Med 2012; 6:797-803. [DOI: 10.2217/bmm.12.61] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Genetic and environmental factors are risk factors for breast cancer. Our aim was to investigate the associations between genetic polymorphism of GST genes (GSTM1, GSTT1 and GSTP1) and susceptibility to breast cancer in an Iranian population. Materials & methods: This case–control study was carried out on 134 patients with breast cancer and 152 healthy, cancer-free women. GSTP1 polymorphism was determined using tetra-primer amplification refractory mutation system PCR assay and GSTM1 and GSTT1 were genotyped by a multiplex PCR. Results: We found that the GSTM1 null genotype is a risk factor for predisposition to breast cancer (odds ratio [OR] = 2.01; 95% CI = 1.78–3.45; p = 0.010). No significant difference was found between the groups regarding GSTT1 null genotype (p > 0.05). The GSTP1 Ile/Val and Val/Val genotypes were associated with breast cancer risk (OR = 3.29; 95% CI = 1.84–5.91; p < 0.0001 and OR = 20.68; 95% CI = 5.66–75.60; p < 0.0001, respectively). Conclusion: In summary, GSTM1 and GSTP1, but not GSTT1 genetic polymorphisms are associated with increased risk of breast cancer in our population.
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Affiliation(s)
- Mohammad Hashemi
- Cellular & Molecular Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Ebrahim Eskandari-Nasab
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Aliakbar Fazaeli
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mohsen Taheri
- Genetic of Non-Communicable Disease Research Center, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Hamzeh Rezaei
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mohammadali Mashhadi
- Department of Internal Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Farshid Arbabi
- Brain & Spinal Injury Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Mahmoud-Ali Kaykhaei
- Department of Internal Medicine, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Mehdi Jahantigh
- Department of Pathology, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
| | - Gholamreza Bahari
- Department of Clinical Biochemistry, School of Medicine, Zahedan University of Medical Sciences, Zahedan, Iran
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Hashemi M, Moazeni-Roodi A, Arbabi F, Fazaeli A, Nasab EE, Taheri M, Kerkhoff C, Ghavami S. Genotyping of -374A/T, -429A/G, and 63 bp Ins/del polymorphisms of RAGE by rapid one-step hexaprimer amplification refractory mutation system polymerase chain reaction in breast cancer patients. Nucleosides Nucleotides Nucleic Acids 2012; 31:401-10. [PMID: 22497255 DOI: 10.1080/15257770.2012.665545] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Several studies have focused on the RAGE genetic background and have demonstrated that its polymorphisms affect the receptor's activity, expression, and downstream signaling. However, there is only little information regarding RAGE polymorphism in breast cancer. In the present study, the authors studied RAGE polymorphisms in 71 patients with breast cancer and 93 healthy women. RAGE -374T/A, -429T/C, and 63 bp Ins/del polymorphisms were analyzed using a hexaprimer amplification refractory mutation system PCR (H-ARMS-PCR). The results showed that RAGE polymorphisms are not associated with breast cancer in the current study population. Larger studies are required to confirm these data in other populations.
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Affiliation(s)
- Mohammad Hashemi
- Cellular and Molecular Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.
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Hashemi M, Eskandari-Nasab E, Fazaeli A, Rezaei H, Mashhadi MA, Arbabi F, Taheri M. Bi-directional PCR allele-specific amplification (bi-PASA) for detection of caspase-8 -652 6N ins/del promoter polymorphism (rs3834129) in breast cancer. Gene 2012; 505:176-9. [PMID: 22659694 DOI: 10.1016/j.gene.2012.05.043] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2012] [Revised: 04/12/2012] [Accepted: 05/20/2012] [Indexed: 01/18/2023]
Abstract
Caspase-8 (CASP8) plays a critical role in regulating apoptosis, and its functional polymorphisms may modify cancer risk. We investigated the possible association between CASP8 -652 6N ins/del (rs3834129) and the risk of breast cancer in a sample of Iranian population. This case-control study was done on 236 breast cancer patients and 203 cancer free healthy female. We designed a rapid and simple bi-directional PCR allele-specific amplification (bi-PASA) for detection of CASP8 -652 6N ins/del polymorphism. The results showed that the CASP8 -652 6N del/dl genotype was inversely associated with breast cancer risk (OR=0.33, 95% CI=0.17-0.65, p=0.001). The frequencies of the del allele in cases and controls were 29.1% and 38.6%, respectively. An inverse association between CASP8 6N del variant and the risk of breast cancer (OR=0.66, 95% CI=0.66-0.87, p=0.002) was found. In conclusion, the result suggests that the CASP8 -652 6N del polymorphism plays a protective role in susceptibility to breast cancer in our population. Further studies in other populations with larger samples are needed to confirm these findings.
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Affiliation(s)
- Mohammad Hashemi
- Cellular and Molecular Research Center, Zahedan University of Medical Sciences, Zahedan, Iran.
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Monajemi A, Arabshahi KS, Soltani A, Arbabi F, Akbari R, Custers E, Hadadgar A, Hadizadeh F, Changiz T, Adibi P. A comprehensive test of clinical reasoning for medical students: An olympiad experience in Iran. J Educ Health Promot 2012; 1:10. [PMID: 23555113 PMCID: PMC3577397 DOI: 10.4103/2277-9531.94420] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Although some tests for clinical reasoning assessment are now available, the theories of medical expertise have not played a major role in this filed. In this paper, illness script theory was chose as a theoretical framework and contemporary clinical reasoning tests were put together based on this theoretical model. MATERIALS AND METHODS This paper is a qualitative study performed with an action research approach. This style of research is performed in a context where authorities focus on promoting their organizations' performance and is carried out in the form of teamwork called participatory research. RESULTS Results are presented in four parts as basic concepts, clinical reasoning assessment, test framework, and scoring. CONCLUSION we concluded that no single test could thoroughly assess clinical reasoning competency, and therefore a battery of clinical reasoning tests is needed. This battery should cover all three parts of clinical reasoning process: script activation, selection and verification. In addition, not only both analytical and non-analytical reasoning, but also both diagnostic and management reasoning should evenly take into consideration in this battery. This paper explains the process of designing and implementing the battery of clinical reasoning in the Olympiad for medical sciences students through an action research.
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Affiliation(s)
- Alireza Monajemi
- Department of Philosophy of Science, Institute for Humanities and Cultural Studies, Tehran, Iran.
| | | | - Akbar Soltani
- Endocrinology and Metabolism Research Center (EMRC), Tehran University of Medical Sciences, Tehran, Iran.
| | - Farshid Arbabi
- Department of Oncology, Zahedan University of Medical Sciences, Zahedan, Iran.
| | - Roghieh Akbari
- Department of Internal Medicine, School of Medicine, Babol University of Medical Sciences, Babol, Iran.
| | - Eugene Custers
- Medical Education Development Center, University of Utrecht Medical Center, Utrecht, Netherlands, Iran.
| | - Arash Hadadgar
- Medical Education Development Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Fatemeh Hadizadeh
- Medical Education Development Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Tahereh Changiz
- Medical Education Research Center, Isfahan University of Medical Sciences, Isfahan, Iran.
| | - Peyman Adibi
- Department of Internal Medicine, School of Medicine, Isfahan University of Medical Sciences, Isfahan, Iran.
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Krampitz G, Greuel E, Kriesten K, Hardebeck H, Engels J, Koester U, Helfgen I, Arbabi F. [Molecular biology of the egg shell matrix]. Berl Munch Tierarztl Wochenschr 1973; 86:313-4. [PMID: 4271114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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