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Kashfi SMH, Golmohammadi M, Behboudi Farahbakhsh F, Nazemalhosseini Mojarad E, Azimzadeh P, Norouzinia M, Montazer Haghighi M, Akbari Z, Damavand B, Molaei M, Anaraki F, Asadzadeh Aghdaei H, Zali MR. Novel Missense Mutation at Codon 2774 (C.8321 G>A) p.S2774N of APC Gene in a Denovo Case of Familial Adenomatous Polyposis. Arch Iran Med 2016; 18:446-9. [PMID: 26161710 DOI: 0151807/aim.0010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Familial adenomatous polyposis (FAP) is an autosomal dominant inherited disease caused by germline mutation in Adenomatous Polyposis Coli (APC) gene. FAP accounts less than 1% of all colorectal cancers incidence. Patients generally present hundreds to thousands of adenomas in colon and rectum and develop colorectal cancer by age 35 - 40 if left untreated. A milder form of FAP with fewer numbers of polyps (< 100) is Attenuated FAP (AFAP) and in comparison with classical FAP, it usually diagnosed at an older age. Approximately 15% - 20% of FAP patients are ''de novo'' cases without any family history of the disease and novel APC mutations account for approximately 25% of FAP cases. In our study, we reported a novel missense mutation at the APC gene in a denovo patient with AFAP like phenotype.
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Affiliation(s)
- Seyed Mohammad Hossein Kashfi
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mina Golmohammadi
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Faegheh Behboudi Farahbakhsh
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ehsan Nazemalhosseini Mojarad
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Pedram Azimzadeh
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohsen Norouzinia
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahdi Montazer Haghighi
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zahra Akbari
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Behzad Damavand
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahsa Molaei
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fakhrialsadat Anaraki
- Colorectal Division of Surgical Ward, Taleghani Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamid Asadzadeh Aghdaei
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Damavand B, Derakhshani S, Saeedi N, Mohebbi SR, Milanizadeh S, Azimzadeh P, Aghdaie HA, Zali MR. Intronic polymorphisms of the SMAD7 gene in association with colorectal cancer. Asian Pac J Cancer Prev 2015; 16:41-4. [PMID: 25640388 DOI: 10.7314/apjcp.2015.16.1.41] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Based on genome-wide association studies (GWAS) a linkage between several variants such as single nucleotide polymorphisms (SNPs) in intron 3 of SMAD7 (mothers against decapentaplegic homolog7) were, rs12953717, rs4464148 and rs4939827 has been noted for susceptibility to colorectal cancer (CRC). In this study we investigated the relationship of rs12953717 and rs4464148 with risk of CRC among 487 Iranian individuals based on a case- control study. Genotyping of SNPs was performed by PCR-RFLP and for confirming the outcomes, 10% of genotyping cases were sequenced with RFLP. Comparing the case and control group, we have found significant association between the rs4464148 SNP and lower risk of CRC. The AG genotype showed decreased risk with and odds ratio of 0.635 (adjusted OR=0.635, 95% CI: 0.417-0.967, p=0.034). There was no significant difference in the distribution of SMAD7 gene rs12953717 TT genotype between two groups of the population evaluated (adjusted OR=1.604, 95% CI: 0.978-2.633, p=0.061). On the other hand, rs12953717 T allele showed a statistically significant association with CRC risk (adjusted OR=1.339, 95% CI: 1.017-1.764, p=0.037). In conclusion, we found a significant association between CRC risk and the rs4464148 AG genotype. Furthermore, the rs12953717 T allele may act as a risk factor. This association may be caused by alternative splicing of pre mRNA. Although we observed a strong association with rs4464148 GG genotype in affected women, we did not detect the same association in CRC male patients.
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Affiliation(s)
- Behzad Damavand
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran E-mail :
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Khorshidi F, Haghighi MM, Nazemalhosseini Mojarad E, Azimzadeh P, Damavand B, Vahedi M, Almasi S, Aghdaei HA, Zali MR. The prostaglandin synthase 2/cyclooxygenase 2 (PTGS2/ COX2) rs5277 polymorphism does not influence risk of colorectal cancer in an Iranian population. Asian Pac J Cancer Prev 2015; 15:3507-11. [PMID: 24870748 DOI: 10.7314/apjcp.2014.15.8.3507] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The prostaglandin-endoperoxide synthase 2 [PTGS2, commonly known as cyclooxygenase-2 (COX-2)] is an enzyme induced by proinflammatory stimuli that is often overexpressed in malignant tissue and involved in the synthesis of prostaglandins and thromboxanes, regulators of processes such as inflammation, cell proliferation, and angiogenesis, all relevant for cancer development. We investigated whether a functional genetic polymorphism, rs5277, in COX-2 may have a risk-modifying effect on sporadic colorectal cancer in an Iranian population. MATERIALS AND METHODS We conducted a case-control study on 167 patients with colorectal cancer and 197 cancer-free controls in Taleghani Hospital in Tehran, Iran, between 2007 and 2011. Peripheral blood samples of both groups were processed for DNA extraction and genotyping of the COX-2 gene polymorphism (rs5277) using PCR-RFLP. RFLP results were confirmed by direct sequencing. Logistic regression analysis was performed to calculate the adjusted odds ratio (OR) and 95% confidence interval (95% CI). RESULTS There was no significant difference in the distribution of COX-2 gene rs5277 polymorphism genotype and the allelic form, among CRC patients compared with the healthy control group (p: 0.867). CONCLUSIONS Our results suggest that rs5277 polymorphism in COX2 could not be a good prognostic indicator for patients with CRC.
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Affiliation(s)
- Fatemeh Khorshidi
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran E-mail :
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Milanizadeh S, Khanyaghma M, Haghighi MM, Mohebbi S, Damavand B, Almasi S, Azimzadeh P, Zali M. Molecular analysis of imperative polymorphisms of MLH1 gene in sporadic colorectal cancer. Cancer Biomark 2014; 13:427-32. [PMID: 24595079 DOI: 10.3233/cbm-140391] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Single nucleotide polymorphisms in mismatch repair genes may be associated with different protein expression, production, and efficiency according to allele status and influence the risk of developing colorectal cancer. OBJECTIVE This research aimed at analyzing two important polymorphisms in MLH1 gene and their association in colorectal cancer susceptibility. METHODS In total, 219 CRC patients and 248 healthy controls were genotyped with PCR/RFLP for I219V and IVS12-169 C>T polymorphisms in MLH1 gene. Sequencing performed to ensure work flow and results. We used unconditional logistic regression after adjusting for age and sex to evaluate the association between each polymorphism and colorectal cancer. RESULTS The MLH1 I219V polymorphism was associated with colorectal cancer susceptibility (P=0.01). Stratified data analysis for gender demonstrated association of AG (P=0.009) and GG (P=0.021) genotypes with risk of colorectal cancer in women. In contrast there is no association with IVS 12-169 C>T polymorphism and colorectal cancer risk. CONCLUSIONS I219V SNP might be a susceptibility factor for CRC and gender is a factor that must be considered when it is analyzing. Further tests need to be done to define it as a dependable prognosis factor.
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Affiliation(s)
| | - Mahsa Khanyaghma
- Gastroenterology and Liver Disease Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Mahdi Montazer Haghighi
- Gastroenterology and Liver Disease Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Seyedreza Mohebbi
- Gastroenterology and Liver Disease Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Behzad Damavand
- Gastroenterology and Liver Disease Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Shohreh Almasi
- Gastroenterology and Liver Disease Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Pedram Azimzadeh
- Gastroenterology and Liver Disease Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
| | - Mohammadreza Zali
- Gastroenterology and Liver Disease Research Center, Shahid Beheshti University of Medical Science, Tehran, Iran
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Derakhshani S, Baradaran Ghavami S, Damavand B, Azimzadeh P, Mohebbi S, Nazemalhosseini Mojarad E, Asadzadeh Aghdaieb H. Association of Polymorphisms with Gastric Cancer: Single Nucleotide Polymorphisms in Promoter or Micro Rna Binding Site? Ann Oncol 2014. [DOI: 10.1093/annonc/mdu334.39] [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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Salehi Moghadam F, Mohebbi SR, Hosseini SM, Romani S, Mirtalebi H, Azimzadeh P, Damavand B, Naghoosi H, Khanyaghma M, Sanati A, Zali MR. Phylogenetic analysis of hepatitis C virus strains and risk factors associated with infection and viral subtypes among Iranian patients. J Med Virol 2014; 86:1342-9. [PMID: 24838700 DOI: 10.1002/jmv.23947] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/28/2014] [Indexed: 01/28/2023]
Abstract
Hepatitis C virus (HCV) has infected approximately 170 million people worldwide. While the seroprevalence of anti-HCV antibody among Iranian blood donors is 0.13%, HCV infection is prevalent in 59-80% of Iranian injecting drug users. One hundred seventy-eight anti-HCV positive patients were referred to the Gastroenterology Department at the Taleghani Hospital (Tehran, Iran) between June 2007 and June 2012. Out of 178 samples, 142 were positive for HCV-RNA. HCV subtypes were determined using phylogenetic analysis of the NS5B or 5'UTR/core regions. Of 142 viremic patients, 71 (50%) were infected with HCV subtype 1a, 43 (30.3%) with subtype 3a, 20 (14.1%) with subtype 1b, 3 (2.1%) with subtype 4d, 2 (1.4%) with subtype 4a, 1 (0.7%) with subtype 2b, and 1 (0.7%) with subtype 6a. Interestingly, genetic analysis of a sub-genomic fragment from one patient identified a non-subtypeable HCV genotype-3 strain. There was a significant association between HCV subtype and a history of injecting drug use (P = 0.003). Subtype 3a was predominant among patients with such a history. Injecting drug use was associated with younger age (P < 0.001). HCV subtype was also significantly associated with a history of upper gastrointestinal endoscopy (P = 0.02). Subtype 1a was more frequent among patients with such a history. In addition, history of upper gastrointestinal endoscopy was significantly associated with older age (P = 0.002). In conclusion, while HCV subtype 1a is predominant among infected Iranian individuals, subtype 3a is predominant among Iranian injecting drug users.
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Affiliation(s)
- Faraz Salehi Moghadam
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Department of Microbiology, Faculty of Biological Sciences, Shahid Beheshti University, Tehran, Iran
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Najjar Sadeghi R, Damavand B, Vahedi M, Mohebbi SR, Zojazi H, Molaei M, Zali MR. Detection of p53 common intron polymorphisms in patients with gastritis lesions from Iran. Asian Pac J Cancer Prev 2013; 14:91-6. [PMID: 23534810 DOI: 10.7314/apjcp.2013.14.1.91] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND p53 alterations have been implicated in the development of many cancers, such as gastric cancer, but there is no evidence of p53 intron alterations in gastritis lesions. The aim of this study was to investigate the p53 intron alterations in gastritis along with p53 and mismatch repair protein expression and microsatellite status. MATERIALS AND METHODS PCR-sequencing was conducted for introns 2-7 on DNA extracted from 97 paired samples of gastritis lesions and normal adjacent tissue. Abnormal accumulation of p53 and mismatch repair proteins was investigated using immunohistochemistry. In addition, microsatellite status was evaluated with reference to five mononucleotide markers. RESULTS Gastritis cases included 41 males and 56 females in the age range of 15-83 years, 87.6% being H.pylori positive. IVS2+38, IVS3ins16 and IVS7+72 were the most polymorphic sites. Their minor allele frequency values were as follows: 0.38, 0.21 and 0.06, respectively. Samples with GG genotype at IVS2+38 and CT at IVS7+72 had no insertion. Moreover, most of the stable samples (91.9 %) had a G allele at IVS2+38. All of the samples were IHC negative for p53 protein, microsatellite stable and expressed mismatch repair proteins. p53 alterations were prominent in the HP+ group, but without statistical significance. CONCLUSIONS According to our results, some p53 polymorphisms such as IVS2+38, IVS3ins16 and IVS7+72, because of their correlations together or with microsatellite status may contribute to gastritis development. However, so far effects on p53 expression and function remain unclear. Therefore, a comprehensive survey is needed to delineate their biological significance.
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Affiliation(s)
- Rouhallah Najjar Sadeghi
- Research Center for Gastroenterology and Liver Diseases, Taleghani Hospital, Shahid Beheshti University of Medical sciences, Tehran, Iran.
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Salehi Moghadam F, Mohebbi SR, Hosseini SM, Damavand B, Zali MR. A new subtype of hepatitis C virus genotype 3: analysis of available evidence. Hepat Mon 2013; 13:e13380. [PMID: 24098307 PMCID: PMC3787683 DOI: 10.5812/hepatmon.13380] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/04/2013] [Accepted: 07/21/2013] [Indexed: 12/11/2022]
Abstract
BACKGROUND Hepatitis C virus (HCV) is one of the leading causes of chronic liver disease. Seven genotypes and more than 80 subtypes have been identified for HCV so far. To date, 10 subtypes (3a to 3i; and 3k) of HCV genotype 3 have been identified. In 2006, two HCV isolates were reported from Iran that belonged to a new subtype of genotype 3. However, considering the consensus proposal for HCV genotype nomenclature, the available sequences of the new subtype did not correspond to the regions that are required to be analyzed prior to subtype assignment. During a study on the molecular epidemiology of HCV in Iran, an HCV isolate (FSM165) which seemed to belong to a new subtype of genotype 3 was obtained from a patient residing in Tehran, Iran. OBJECTIVES The aim of this study was to assess the relatedness of isolate FM165 together with several sequences retrieved from the database to the new HCV-3 subtype reported from Iran in 2006. MATERIALS AND METHODS Various parts of the genome including the core/E1 region and two segments of the NS5B region were amplified and sequenced for isolate FSM165. Furthermore, using the Basic Local Alignment Search Tool (BLAST), the HCV database was searched for sequences that had a high level of similarity with sequences of FSM165 isolate and such sequences were retrieved from the database. To investigate the relatedness of isolate FSM165 and also the retrieved sequences to a new HCV-3 subtype reported previously, phylogenetic analyses were performed using the Kimura two-parameter model and the neighbor joining method. RESULTS Phylogenetic analysis of the partial NS5B region demonstrated the relatedness of isolate FSM165 to the new subtype reported from Iran in 2006. Moreover, some core/E1 and NS5B sequences that had a high level of similarity with FSM165 isolate were found through searching the HCV database. These sequences were previously either misclassified or could not be accurately classified. Phylogenetic analyses showed that all of the described sequences belonged to the new subtype of HCV genotype 3. CONCLUSIONS Data suggests that the new subtype has a vast geographical distribution in Iran. The core/E1 and the NS5B sequences described in this paper can be used as references for the new HCV-3 subtype in future studies.
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Affiliation(s)
- Faraz Salehi Moghadam
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran
- Department of Microbiology, Faculty of Biological Sciences, Shahid Beheshti University, Tehran, IR Iran
| | - Seyed Reza Mohebbi
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran
- Corresponding author: Seyed Reza Mohebbi, Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran. Tel.: +98-2122432514, Fax: +98-2122432515,
| | - Seyed Masoud Hosseini
- Department of Microbiology, Faculty of Biological Sciences, Shahid Beheshti University, Tehran, IR Iran
| | - Behzad Damavand
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran
| | - Mohammad Reza Zali
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, IR Iran
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Romani S, Mohebbi SR, Khanyaghma M, Azimzadeh P, Bozorgi SM, Damavand B, Jadali F. Detection of human Bocavirus 1, 2 and 3 from patients with acute gastroenteritis. Gastroenterol Hepatol Bed Bench 2013; 6:S77-81. [PMID: 24834292 PMCID: PMC4017530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Accepted: 08/30/2013] [Indexed: 11/16/2022]
Abstract
AIM We aimed to investigate the prevalence of Human Bocavirus isolates among Iranian patients suffering from acute gastroenteritis. BACKGROUND Human Bocavirus is a new parvovirus that has been identified in association with gastroenteritis. Limited data are available about HBoV in Iran. PATIENTS AND METHODS Viral DNA was extracted from all 294 stool samples. HBoV DNA was detected in extracted samples by polymerase chain reaction (PCR) amplification of a 354 bp of noncapsid protein 1 (NP1) gene. In addition, all samples were also subjected to a nested PCR to amplify a 455 bp of nonstructural 1 (NS1) gene. RESULTS The main clinical symptoms among HBoV positive patients were diarrhea (77.7%), fever (62.9%), vomiting (55.5%), and anorexia (59.2%). NP1 PCR was positive in 8 samples (2.72%), NS1 was positive in 16 patients (5.44%) and 3 samples had positive results in both regions (1.02%). CONCLUSION Our results suggest that HBoV could be considered as one of the important etiologic agents of acute gastroenteritis cases in Iran.
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Affiliation(s)
- Sara Romani
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Reza Mohebbi
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahsa Khanyaghma
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Pedram Azimzadeh
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sajad Majidizadeh Bozorgi
- Basic and Molecular Epidemiology of Gastroenterology Disorders Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Behzad Damavand
- Gastroenterology and Liver Diseases Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Farzaneh Jadali
- Department of Pathology and Laboratory sciences, Mofid Children's Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Mohebbi SR, Amini-Bavil-Olyaee S, Zali N, Damavand B, Azimzadeh P, Derakhshan F, Sabahi F, Zali MR. Characterization of hepatitis B virus genome variability in Iranian patients with chronic infection, a nationwide study. J Med Virol 2012; 84:414-23. [PMID: 22246826 DOI: 10.1002/jmv.23200] [Citation(s) in RCA: 15] [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: 12/15/2022]
Abstract
Hepatitis B virus (HBV) isolates from Iranian patients around the country were characterized. Eighty-one complete genomes from HBV isolates were sequenced and analyzed. The studied population was grouped into three categories including inactive carriers, patients with chronic hepatitis, and patients with liver cirrhosis. Molecular and phylogenetic analyses revealed that Iranian patients were infected with HBV genotype D and subgenotype D1. The most common subtype was ayw2, followed by ayw3 and ayw4. Several deletions and insertions that had no correlation with disease outcome were observed in the HBV genomes. The most frequent mutation in the major hydrophilic region (MHR) of HBV surface antigen (HBsAg) was sP120S. Almost half of the patients studied carried precore (PC) mutant variants and one-third of the studied population was infected with variants carrying basal core promoter (BCP) mutations. PC and BCP mutations were observed in older patients, especially in those with chronic liver disease. Sixty-seven patients (82.7%) were HBeAg negative, and the prevalence of precore mutant isolates (G1896A) was higher in this group than in HBeAg-positive patients. Lamivudine drug resistance mutations were detected after 1 year of treatment in about 30% of lamivudine-treated patients. In conclusion, these results demonstrate that HBV subgenotype D1 is the only subgenotype circulating in Iran, and there is no evidence of any exotic genotype in the region. The HBV PC (G1896A) mutation may play an important role in the clinical outcome of the disease by increasing the risk of progressive liver disease among Iranian patients infected with HBV.
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Affiliation(s)
- Seyed Reza Mohebbi
- Research Center for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Bozorgi SM, Tahaei SME, Mohebbi SR, Sahba N, Damavand B, Romani S, Azimzadeh P, Naghoosi H, Milanizadeh S, Mohebbi A, Zali MR. Molecular prevalence of JC virus in Tehran, Iran. Gastroenterol Hepatol Bed Bench 2012; 5:84-9. [PMID: 24834205 PMCID: PMC4017453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2011] [Accepted: 11/21/2011] [Indexed: 11/20/2022]
Abstract
AIM Since data about prevalence of JC virus in Iranian population is scarce, this study was designed to evaluate the prevalence of JC virus in healthy individuals who had attended Fajr hospital and Farjam clinical laboratory in Tehran, Iran. BACKGROUND JC virus is the causative agent of progressive multifocal encephalopathy (PML) in individuals with suppressed immune system. There are some evidences that this virus is responsible for some forms of cancers for example colorectal and gastric cancers in humans. PATIENTS AND METHODS Urine samples from 133 healthy individuals older than 18 years old were collected and after extraction of viral DNA, PCR was performed to determine the presence of virus. Results of the test and demographic data of subjects were entered into SPSS program and were analyzed by it. RESULTS 71 subjects were male and 62 individuals were female. Mean age of the population was 42.23 ± 13.47. From the total number of 133 subjects, 51 (38.3%) individuals were positive for the presence of JC virus. Gender had statistically significant relationship with JC virus presence (p= 0.042). Age was not significantly related to JC virus presence status (p= 0.3). CONCLUSION Obtained rate of JC prevalence in this study is similar to the results of studies in India and Philippine. Because of this virus's role in AIDS and the role of this virus in gastrointestinal cancers have been revealed in recent years, the more extended studies on the prevalence of this virus in different populations in Iran is necessary.
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Affiliation(s)
- Sajjad Majidizadeh Bozorgi
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Mohammad Ebrahim Tahaei
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Reza Mohebbi
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Negar Sahba
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Behzad Damavand
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sara Romani
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Pedram Azimzadeh
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamed Naghoosi
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Saman Milanizadeh
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | | | - Mohammad Reza Zali
- Research Institute for Gastroenterology and Liver Disease, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Shemirani AI, Haghighi MM, Milanizadeh S, Taleghani MY, Fatemi SR, Damavand B, Akbari Z, Zali MR. The role of kras mutations and MSI status in diagnosis of colorectal cancer. Gastroenterol Hepatol Bed Bench 2011; 4:70-5. [PMID: 24834160 PMCID: PMC4017411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/22/2010] [Accepted: 12/19/2010] [Indexed: 11/29/2022]
Abstract
AIM The aim of the current investigation was to examine the profile of Kras mutations accompanied with MSI (microsattelite instability) status in polyps and colorectal carcinoma tissues in an Iranian population. BACKGROUND Kras mutations in colorectal cancer cause resistance to anti-Epidermal Growth Factor Receptor (EGFR). So it can be considered as a true indicator of EGFR pathway activation status. Kras mutations can be detected in approximately 30% to 40% of all patients with colorectal cancer. The most hot spot of the gene is located in exons 2 and 3. PATIENTS AND METHODS In this study we examined exons 2 and 3 Kras gene using polymerase chain reactions and subsequent sequencing of the exons in 95 patients with sporadic colorectal cancer including 48 tumors and 47 polyps. This study was performed using biopsy samples from the patients. We sequenced the Kras gene in a panel of human colorectal tumors and polyps in addition to detecting MSI status using fluorescent technique. RESULTS We could detect 6 mutations in tumors including 5 mutations in codon 12 and one mutation in codon 13. Moreover, in polyps 2 mutations were determined in codon 13 and one in codon 12. Microsatellite instability assay revealed the presence of 5 and 6 MSI in tumors and polyps, respectively. Among the MSI mononucleotide markers, NR-21 marker demonstrated the most frequency (60%) in the both groups. CONCLUSION Our findings showed that probably the profile of mutations in tumors is not entirely compatible with the pattern of mutations in polyps. However, just one of the mutations, Gly12Asp, was similar in both groups.
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