در هنگام جستجو کلمه در قسمت عنوان میتوانید کلمات مورد جستجو را با کاراکتر (-) جدا کنید.
کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Pathology
- نوع مقاله: Journal Article
- کلمات کلیدی: Iran,Human papillomavirus (HPV),Age Distribution,Genotype distribution,INNO LiPA HPV genotyping
- چکیده:
- چکیده انگلیسی: Background & Objective: Human papillomavirus (HPV) is the main cause of genital warts and some anogenital cancers in male and female subjects which is commonly transmitted by sexual contacts. The objective of this cross-sectional study was to examine the prevalence of HPV genotypes in 10,266 Iranian male and female population, according to their age.
Methods: Samples were collected from the penile and anal sites of male subjects and the vagina and cervix of female subjects in a time period between 2011 and 2016. HPV DNA was detected in PCR using the MY09 and MY11 primers, and the INNO-LiPA assay was applied for HPV genotyping. To investigate the relevance of HPV infection and age, the samples were classified into 4 age groups (13-29, 30-44, 45-59, and 60-74).
Results: Totally, the most common low risk HPV genotypes detected in the studied male and female subjects were HPV-6 (77.7% and 43.3%) and HPV-11 (13.7% and 11.4%), and more frequent high risk HPV genotypes were HPV-16 (5.5% and 16.6%) and HPV-52 (3.2% and 9.6%), respectively. High burden of the HPV infection was observed at ranges of 30 and 44 years (51.8%) with a peak at ranges between 30 and 32 years. No considerable statistically significant correlation was found between HPV infection and age (P=1).
Conclusion: This study gave an epidemiological overview of circulating HPV genotypes in Iranian population to develop future vaccination policies, though the findings of prevalent HPV genotypes in female subjects were inconsistent with the previous studies reported in Iran.- انتشار مقاله: 01-09-1397
- نویسندگان: Mina Mobini Kesheh,Hossein Keyvani
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Pathology
- نوع مقاله: Journal Article
- کلمات کلیدی: Chickenpox,Varicella zoster virus,RFLP assay,Restriction enzyme
- چکیده:
- چکیده انگلیسی: Background: Varicella zoster virus (VZV) causes chickenpox in children and zoster (zona) in the elderly. Using RFLP-PCR method for detection of VZV specific SNPs ORF38, 54 and 62 could distinguish the profile of VZV isolates. The aim of this study was to investigate enzymatic digestion pattern of VZV ORF38 and ORF54 in chickenpox patients using RFLP technique.
Methods: Thirty-eight chickenpox patients, who referred to the hospitals of Iran University of Medical Sciences in Tehran from May 2010 to June 2015 were enrolled in this cross sectional study. After the DNA extraction, PCR amplification of 38 VZV isolates performed by specific primers of ORFs 38 and 54, then RFLP assay and digestion carried out by PstI (for ORF38) and BglI (for ORF54) restriction enzymes.
Results: Of 38 positive VZV DNA, the mean age (yr)±SD was 34.4±23.3 (range: 7-89). 22 (57.9%) were female and 16 (42.1%) were male. The predominant VZV profile of BglI+PstI+ were 89.5% (34/38) followed by 10.5% (4/38) PstI+BglI‾. Statistical analysis showed that there was no significant relationship between genotype, age, sex, and year of infection variables (P value> 0.05). The common VZV genotype among Iranian patients with chickenpox and zona infection is genotype BglI+PstI+ followed by PstI+BglI‾.
Conclusion: There are different VZV circulating genotypes that call for for more research on this field by widely population and other methods such as nucleotide sequencing to justify the accurate VZV genotype prevalence in Iran.- انتشار مقاله: 04-05-1394
- نویسندگان: Hossein Keyvani,Fahimeh Safarnezhad Tameshkel,Mohammad Hadi Karbalaie Niya
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Basic Medical Sciences
- نوع مقاله: Journal Article
- کلمات کلیدی: Hepatitis B vaccine,HBsAg mutants,Hepatitis B immune epitopes
- چکیده:
- چکیده انگلیسی: Objective (s):The aim of this study was to determine the correlation between vaccine therapy and appearance of mutations in hepatitis B surface antigen (HBsAg)-positive chronic hepatitis B virus (HBV) patients. Materials and Methods: 16 patients received the HBV vaccine and another 16 individuals from the control group did not. The surface gene was amplified and directly sequenced from samples prior to vaccination and six months after the third dose. Results:Only one patient lost HBsAg. 48 and 44 amino acid mutations were found before and after vaccine therapy in the vaccine group respectively, 51 of which (55.4%) occurred in immune epitopes: 5 were in B cell, 21 in T helper (Th), and 25 in cytotoxic T-lymphocyte (CTL) epitopes. In the control group, 35 and 41 amino acid substitutions were found before and after therapy, respectively. 32 (42%) of 76 amino acid changes occurred within immune epitopes. There were no differences in age, gender, and duration of chronicity in both patient and control groups in terms of the frequency and the patterns of mutations. Conclusion: In chronic carriers who already had HBsAg variants selected by the host-immune response, any immune stimulation by the vaccine had no effect on the chronic state of these patients or selected any remarkable escape mutants. Newer strategies should be considered based on third generation or the use of DNA vaccines or new adjuvants.
- انتشار مقاله: 02-07-1393
- نویسندگان: Maryam Daram,Ghodratollah Montazeri,Hadi Karimzadeh,Reza Malekzadeh,Mahmood Mahmoodi,Zahra Goodarzi,Hossein Keyvani,Shahram Mirmomen,Seyed Moayed Alavian,Michael Roggendorf,Seyed Mohammad Jazayeri
- مشاهده
- جایگاه : پژوهشی
- مجله: International Journal of Advanced Biological and Biomedical Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Real-time PCR,bla OXA-23,bla OXA-48,E-test,MHT
- چکیده:
- چکیده انگلیسی: Background:
The prevalence of carbapenem-resistant Enterobacteriaceae, especially Klebsiella pneumoniae carbapenemase (KPC), has been recently reported worldwide. Therefore, there is an indispensable need for precise and rapid detection of these carbapenemases.
Objectives:
This study aimed to propose an accurate and rapid method for detecting K. pneumoniae carbapenemase genes from clinical samples, using reverse transcription-polymerase chain reaction (RT-PCR) and to evaluate the expression of these genes in the presence of β-lactam antibiotic by real-time PCR assay.
Methods:
One hundred and eighty-one K. pneumoniae strains were collected from patients presenting to Firoozgar Hospital of Tehran, Iran. The strains were tested using the disk diffusion method, the modified Hodge test (MHT), and E-test minimum inhibitory concentration (MIC). Next, reverse transcription-PCR method was applied for the identification of bla OXA-23 and bla OXA-48 genes. Finally, expression of genes was measured by real-time PCR assay in the presence and absence of β-lactam antibiotic.
Results:
Phenotypic testing also showed a high level of antibiotic resistance, while the genotypic methods indicated the presence and expression of carbapenemase genes.
Conclusions:
The findings suggest revisions in the current antibiotic therapy protocols, considering the high expression level of resistant carbapenemases to K. pneumoniae strains.- انتشار مقاله: 22-03-1398
- نویسندگان: Narjes Mohammadi Bandari,Hossein Keyvani,Mohsen Zargar,Malihe Talebi,Mohammad Reza Zolfaghari
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Phylogenetic analysis,Colorectal cancer (CRC),Human bocavirus (HBoV)
- چکیده:
- چکیده انگلیسی: Background: Colorectal cancer (CRC) as a worldwide human health concern is identified being a multifactorial
subject that infection with specific viral particles such as oncogenic viruses is research interest. Human bocavirus (HBoV)
as a recent isolated virus has been investigated in many respiratory and enteric diseases but rare studies evaluates it in
tissue specimens especially in cancerous sections. The aim of this study was to detect the presence of HBoV genome
and its genotyping in CRC patient’s tissue and compare the result with matched healthy control group tissue. Method:
in this retrospective case-control study, CRC cases were sporadic and non-familial cancerous while control subjects had
healthy or non-malignant lesions in colon tissue. A conventional-PCR performed by specific primers for HBoV VP1
gene. After sequencing of positive PCR products, raw data used for trimming and alignment by bioinformatics software
CLC Main Workbench 5 and MEGA5. SPSS v.22 used for statistical calculations. Result: a total of 157 subjects were
participated that 66 were diagnosed as CRC cases and 91 were non-CRC colon tissue as control group that matched by
the cases. The mean age (y) ± standard deviation of each case and control groups were 59.35±14.48 and 57.21±14.66,
respectively. PCR results showed there were 1.3% (2/157) HBoV positive (of each groups one was positive). Sequencing
analysis showed all were HBoV-1 genotype. Conclusion: our study showed there are low rate of HBoV genome in
Iranian CRC and non-CRC colon tissue. Furthermore, the predominant genotype in our studied subsets were HBoV-1
according to phylogenetic analysis.- انتشار مقاله: 01-05-1397
- نویسندگان: Mohammad Hadi Karbalaie Niya,Hossein Ajdarkosh,Fahimeh Safarnezhad Tameshkel,Mahshid Panahi,Maryam Tabasi,Behnaz Bouzari,Mahdi Alemrajabi,Hossein Keyvani
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Human papillomavirus (HPV),Head and Neck Squamous Cell Carcinoma (HNSCC),Molecular epidemiology,Nested-PCR,INNO-LiPA HPV genotyping
- چکیده:
- چکیده انگلیسی:
Background: Head and neck squamous cell carcinomas (HNSCC) are a major health issue in many parts of the world. Recently, attention has focused on the human papilloma virus (HPV) as a potential causative agent for HNSCC. This study aimed to survey HPV occurrence in HNSCCs as part of a comprehensive molecular epidemiology approach. Methods: In this retrospective study, patients were recruited from hospitals affiliated to the Iran University of Medical Sciences, Tehran, Iran. Formalin-fixed paraffin-embedded (FFPE) blocks were subjected to DNA isolation by QIAamp® DNA FFPE Tissue Kit and nested PCR, HPV-16 specific conventional PCR, and extra INNO-LiPA HPV genotyping assays were subsequently performed. PCR products were purified with a High Pure PCR Product Purification Kit and sequenced with an ABI 3730 XL sequencer. CLC Main Workbench 5 and MEGA5 bioinformatics software was used to analyze the raw data and to create the phylogenetic tree. SPSS v.20 was applied for statistical analysis. Results: A total of 156 FFPE blocks were collected from 2011 to 2017. Total mean age (y) of participants was 60.5 ± 12.6; 77.6 % (121/156) being men and 22.4% (35/156) e women. Overall, 5/156 (3.2%) patients (3 females and 2 males) were found to be HPV positive using the three methods. HPV genotyping revealed HPV types 16, 2, 27, and 43 in these malignancies. Tumor location and lymph node involvement indicated significant differences between the sexes. Conclusion: Although high risk HPV genotypes have been associated with HNSCCs, our findings indicate a potential of low risk HPV types to also contribute to such malignancies.- انتشار مقاله: 01-05-1396
- نویسندگان: Mohammad Hadi Karbalaie Niya,Fahimeh Safarnezhad Tameshkel,Mahshid Panahi,Farah Bokharaei Salim,Seyed Hamid Reza Monavari,Hossein Keyvani
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Human papillomavirus (HPV),Head and Neck Squamous Cell Carcinoma (HNSCC),Molecular epidemiology,Nested-PCR,INNO-LiPA HPV genotyping
- چکیده:
- چکیده انگلیسی:
Background: Head and neck squamous cell carcinomas (HNSCC) are a major health issue in many parts of the world. Recently, attention has focused on the human papilloma virus (HPV) as a potential causative agent for HNSCC. This study aimed to survey HPV occurrence in HNSCCs as part of a comprehensive molecular epidemiology approach. Methods: In this retrospective study, patients were recruited from hospitals affiliated to the Iran University of Medical Sciences, Tehran, Iran. Formalin-fixed paraffin-embedded (FFPE) blocks were subjected to DNA isolation by QIAamp® DNA FFPE Tissue Kit and nested PCR, HPV-16 specific conventional PCR, and extra INNO-LiPA HPV genotyping assays were subsequently performed. PCR products were purified with a High Pure PCR Product Purification Kit and sequenced with an ABI 3730 XL sequencer. CLC Main Workbench 5 and MEGA5 bioinformatics software was used to analyze the raw data and to create the phylogenetic tree. SPSS v.20 was applied for statistical analysis. Results: A total of 156 FFPE blocks were collected from 2011 to 2017. Total mean age (y) of participants was 60.5 ± 12.6; 77.6 % (121/156) being men and 22.4% (35/156) e women. Overall, 5/156 (3.2%) patients (3 females and 2 males) were found to be HPV positive using the three methods. HPV genotyping revealed HPV types 16, 2, 27, and 43 in these malignancies. Tumor location and lymph node involvement indicated significant differences between the sexes. Conclusion: Although high risk HPV genotypes have been associated with HNSCCs, our findings indicate a potential of low risk HPV types to also contribute to such malignancies.- انتشار مقاله: 01-05-1396
- نویسندگان: Mohammad Hadi Karbalaie Niya,Fahimeh Safarnezhad Tameshkel,Mahshid Panahi,Farah Bokharaei Salim,Seyed Hamid Reza Monavari,Hossein Keyvani
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Human papillomavirus (HPV),Head and Neck Squamous Cell Carcinoma (HNSCC),Molecular epidemiology,Nested-PCR,INNO-LiPA HPV genotyping
- چکیده:
- چکیده انگلیسی:
Background: Head and neck squamous cell carcinomas (HNSCC) are a major health issue in many parts of the world. Recently, attention has focused on the human papilloma virus (HPV) as a potential causative agent for HNSCC. This study aimed to survey HPV occurrence in HNSCCs as part of a comprehensive molecular epidemiology approach. Methods: In this retrospective study, patients were recruited from hospitals affiliated to the Iran University of Medical Sciences, Tehran, Iran. Formalin-fixed paraffin-embedded (FFPE) blocks were subjected to DNA isolation by QIAamp® DNA FFPE Tissue Kit and nested PCR, HPV-16 specific conventional PCR, and extra INNO-LiPA HPV genotyping assays were subsequently performed. PCR products were purified with a High Pure PCR Product Purification Kit and sequenced with an ABI 3730 XL sequencer. CLC Main Workbench 5 and MEGA5 bioinformatics software was used to analyze the raw data and to create the phylogenetic tree. SPSS v.20 was applied for statistical analysis. Results: A total of 156 FFPE blocks were collected from 2011 to 2017. Total mean age (y) of participants was 60.5 ± 12.6; 77.6 % (121/156) being men and 22.4% (35/156) e women. Overall, 5/156 (3.2%) patients (3 females and 2 males) were found to be HPV positive using the three methods. HPV genotyping revealed HPV types 16, 2, 27, and 43 in these malignancies. Tumor location and lymph node involvement indicated significant differences between the sexes. Conclusion: Although high risk HPV genotypes have been associated with HNSCCs, our findings indicate a potential of low risk HPV types to also contribute to such malignancies.- انتشار مقاله: 01-05-1396
- نویسندگان: Mohammad Hadi Karbalaie Niya,Fahimeh Safarnezhad Tameshkel,Mahshid Panahi,Farah Bokharaei Salim,Seyed Hamid Reza Monavari,Hossein Keyvani
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Pacific Journal of Cancer Prevention
- نوع مقاله: Journal Article
- کلمات کلیدی: Tissue Plasminogen Activator,Pichia pastoris,Fibrin,Recombinant Proteins
- چکیده:
- چکیده انگلیسی:
Background: Human tissue-type plasminogen activator (t-PA) is a key protease of the trypsin family. It catalyzes the activation of zymogen plasminogen to the fibrin-degrading proteinase, plasmin, leading to digestion of fibrin clots. The recombinant enzyme produced by recombinant technology issued to dissolve blood clots in treatment of various human diseases such as coronary artery thrombosis, pulmonary embolism, acute ischemic stroke (AIS). Pichia pastoris expression system is a unique system for the production of high level of recombinant proteins. GS115 and KM71H are two kinds of Pichia pastoris strains whilst production of recombinant proteins in these strains is not predictable. The aim of the study was evaluation of t-PA expression in KM71H strains. Methods: In this study, the cDNA of the t-PA gene was amplified by PCR, sequenced and cloned into Pichia pastoris KM71H host strain using pPICZalphaA expression vector that allows methanol-induced expression and secretion of the protein. Results: Dot blotting results confirmed the presence oft-PA in the cell supernatant. Western blotting test revealed the approximate size of 70 KDa for recombinant t-PA. Quantitative ELISA experiment showed 810 μg/L of t-PA in the supernatant samples. Zymography analysis confirmed the proteolytic activity and biological function of the expressed recombinant t-PA. Conclusions: Correspondingly, Pichia pastoris KM71H is an appropriate strain for production of active recombinant protein.- انتشار مقاله: 15-03-1396
- نویسندگان: Amir Hossein Mohseni,Mohammad Soleimani,Keivan Majidzadeh-A,Sedigheh Taghinezhad-S,Hossein Keyvani
- مشاهده