Microbiology
Sina Rostami; Alireza Pasdar; Sina Gerayli; Hamed Hatami; Samaneh Sepahi; Fatemeh Nategh; Mojtaba Meshkat; Seyed Mousalreza Hoseini; Mitra Ahadi; Hamid Reza Sima; Hasan Vosughinia; Mohammad Reza Sarvghad; Abbas Esmaeelzade; Hosein Nomani; Homan Mosanan Mozafari; Fariba Rezai Talab; Mohammad Taghi Shakeri; Zahra Meshkat
Abstract
Background and Objectives: Interferon-gamma is an important cytokine, which facilitates immunity against intracellular pathogens. Several factors, including genetic variations of cytokine-producing genes have been shown to influence the progression and severity of Hepatitis C virus (HCV) infection. Methods: ...
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Background and Objectives: Interferon-gamma is an important cytokine, which facilitates immunity against intracellular pathogens. Several factors, including genetic variations of cytokine-producing genes have been shown to influence the progression and severity of Hepatitis C virus (HCV) infection. Methods: Between January and December 2012, 87 HCV-infected individuals and 89 individuals without HCV infection were recruited for the study of Single Nucleotide Polymorphism (SNP) at Interferon Gamma (IFNG) +874 T/A. After extraction of genomic DNA from Peripheral Blood Mononuclear Cells (PBMCs) in blood sample of the individuals, Amplification Refractory Mutation System (ARMS) polymerase chain reaction was performed to evaluate the SNP at this position. Results: The frequency of genotype TA was 62.1% in the HCV-infected group, while it was 47.2% for the control group (p=0.033). However, after adjusting for confounders (including alcohol consumption, drug addiction, transfusion, and tattoos), the genotypes at this position did not show any statistically significant association with HCV infection (adjusted P values were above 0.05). The frequency of allele A was slightly higher in patients than the controls (55.2% versus 48.3%).Carriers of A allele were more frequent in patients with HCV infection compared to the control group (55.17% in patients versus 48.31% in the control group; P=0.02). However, after adjustment for confounders, the results were no longer statistically significant (P=0.2). Conclusion: A carrier status for certain alleles and genotypes at Interferon Gamma (IFNG) +874 T/A may lead to higher susceptibility to HCV infection in a certain population.
Microbiology
Faezeh Ghasemi; Sina Rostami; Maryam Sadat Nabavinia; Zahra Meshkat
Volume 11, Issue 1 , January 2016, , Pages 41-46
Abstract
Background: Human papillomavirus (HPV) is responsible for the development of cervical neoplasia. Infection with human papillomavirus type 16 (HPV-16) is a major risk factor for the development of cervical cancer. The virus encodes three oncoproteins (E5, E6 and E7), of which, the E7 oncoprotein ...
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Background: Human papillomavirus (HPV) is responsible for the development of cervical neoplasia. Infection with human papillomavirus type 16 (HPV-16) is a major risk factor for the development of cervical cancer. The virus encodes three oncoproteins (E5, E6 and E7), of which, the E7 oncoprotein is the major protein involved in cell immortalization and transformation of the infected cells. The aim of the current study was to develop Michigan Cancer Foundation 7 (MCF7) cells, which could stably express E7 protein of HPV type 16. Methods: E7 gene of HPV type 16 was introduced into MCF7 cells by Lipofectamine 2000 reagent and the transfected cells were treated with G418 antibiotic. After antibiotic selection of the transfected cells, stable expression of E7 gene of HPV16 was confirmed by reverse transcriptase polymerase chain reaction (RT-PCR). Results: Antibiotic selections of transfected cells were performed and transfected cells were alive in cytotoxic concentration of the antibiotic. RNA was extracted from transfected cells and E7 gene of HPV16 was amplified by RT-PCR method and a 350-bp band corresponds to E7 was observed. Conclusion: Results confirmed the stable transfection of cells. The stably transfected cells can be used as a useful tool in future studies on HPV16 and cancers caused by this virus.
Masoumeh Salehpour; Naser Tayyebi Meibodi; Roghayeh Teimourpour; Adel Ghorani-Azam; Samaneh Sepahi; Sina Rostami; Zahra Meshkat
Abstract
Background &Objective: Breast cancer is the most common female malignancy. Detection of DNA of human papillomaviruses (HPVs) in breast carcinomas suggests that the virus may play a role in the pathogenesis of this disease. The aim of this study was to evaluate the frequency of HPVs genotypes 6, 11, ...
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Background &Objective: Breast cancer is the most common female malignancy. Detection of DNA of human papillomaviruses (HPVs) in breast carcinomas suggests that the virus may play a role in the pathogenesis of this disease. The aim of this study was to evaluate the frequency of HPVs genotypes 6, 11, 16, 18 and 31 in paraffin-embedded tissue samples of invasive breast carcinomas. Methods: Three hundred and twenty six paraffin-embedded tissue samples of breast cancer were studied. PCR was performed using specific primers for HPV genotypes. Results: Of total 206 (63.2%) samples positive for Beta-globin gene, 54 (26.2%) were HPV-positive and 152 (73.8%) were negative for HPV. Distribution of HPV genotypes were as follows: 19 (25.7%) were positive for genotype 11, 5 (6.8%) were positive for genotype 6; and 2 cases (2.7%) were positive for both genotypes 6 and 11. Samples were also screened for HPV genotypes 16, 18 and 31 but none was positive. Conclusion: The current study confirmed the association of HPV and breast cancer. However, all samples were negative for high-risk HPV types 16, 18 and 31. How to cite this article: Salehpour M, Tayyebi Meibodi N, Teimourpour R, Ghorani-Azam A, Sepahi S, Rostami S, et al. Frequency of Human Papillomavirus Genotypes 6, 11, 16, 18 And 31 in Paraffin-Embedded Tissue Samples of Invasive Breast Carcinoma, North-East of Iran. Iran J Pathol. 2015;10(3):192-8.