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Scheeff S, Wang Y, Lyu MY, Nasiri Ahmadabadi B, Hau SCK, Hui TKC, Zhang Y, Zuo Z, Chan RWY, Ng BWL. Design and Synthesis of Bicyclo[4.3.0]nonene Nucleoside Analogues. Org Lett 2023; 25:9002-9007. [PMID: 38051027 PMCID: PMC10749478 DOI: 10.1021/acs.orglett.3c03590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/17/2023] [Accepted: 11/29/2023] [Indexed: 12/07/2023]
Abstract
Nucleoside analogues are effective antiviral agents, and the continuous emergence of pathogenic viruses demands the development of novel and structurally diverse analogues. Here, we present the design and synthesis of novel nucleoside analogues with a carbobicyclic core, which mimics the conformation of natural ribonucleosides. Employing a divergent synthetic route featuring an intermolecular Diels-Alder reaction, we successfully synthesized carbobicyclic nucleoside analogues with high antiviral efficacy against respiratory syncytial virus.
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Affiliation(s)
- Stephan Scheeff
- School of
Pharmacy, Faculty of Medicine, The Chinese
University of Hong Kong, Shatin , Hong Kong
| | - Yan Wang
- Department
of Paediatrics, Faculty of Medicine, The
Chinese University of Hong Kong, Shatin , Hong Kong
- Hong Kong
Hub of Paediatric Excellence, The Chinese
University of Hong Kong, Kowloon
Bay, Hong Kong
| | - Mao-Yun Lyu
- School of
Pharmacy, Faculty of Medicine, The Chinese
University of Hong Kong, Shatin , Hong Kong
| | - Behzad Nasiri Ahmadabadi
- Department
of Paediatrics, Faculty of Medicine, The
Chinese University of Hong Kong, Shatin , Hong Kong
- Hong Kong
Hub of Paediatric Excellence, The Chinese
University of Hong Kong, Kowloon
Bay, Hong Kong
| | - Sam Chun Kit Hau
- Department
of Chemistry, The Chinese University of
Hong Kong, Shatin , Hong Kong
| | | | - Yufeng Zhang
- School of
Pharmacy, Faculty of Medicine, The Chinese
University of Hong Kong, Shatin , Hong Kong
| | - Zhong Zuo
- School of
Pharmacy, Faculty of Medicine, The Chinese
University of Hong Kong, Shatin , Hong Kong
| | - Renee Wan Yi Chan
- Department
of Paediatrics, Faculty of Medicine, The
Chinese University of Hong Kong, Shatin , Hong Kong
- Li Ka Shing
Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin , Hong Kong
- Hong Kong
Hub of Paediatric Excellence, The Chinese
University of Hong Kong, Kowloon
Bay, Hong Kong
- S.H. Ho Research
Centre for Infectious Diseases, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, Hong Kong
| | - Billy Wai-Lung Ng
- School of
Pharmacy, Faculty of Medicine, The Chinese
University of Hong Kong, Shatin , Hong Kong
- Li Ka Shing
Institute of Health Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Shatin , Hong Kong
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Fung E, Lui LT, Huang L, Cheng KF, Lau GHW, Chung YT, Ahmadabadi BN, Xie S, Lee JSW, Hui E, So WY, Sung JJY, King I, Goggins WB, Chan Q, Järvelin MR, Ma RCW, Chow E, Kwok T. Characterising frailty, metrics of continuous glucose monitoring, and mortality hazards in older adults with type 2 diabetes on insulin therapy (HARE): a prospective, observational cohort study. The Lancet Healthy Longevity 2021; 2:e724-e735. [DOI: 10.1016/s2666-7568(21)00251-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 09/29/2021] [Accepted: 09/30/2021] [Indexed: 12/26/2022]
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Abdollahi SH, Ayoobi F, Khorramdelazad H, Nasiri Ahmadabadi B, Rezayati M, Kazemi Arababadi M, Zare-Bidaki M. Levels of Transforming Growth Factor-Beta After Immunization of Mice With in vivo prepared Toxoplasma gondii Excretory/Secretory Proteins. Jundishapur J Microbiol 2015; 8:e17802. [PMID: 26060564 PMCID: PMC4458350 DOI: 10.5812/jjm.8(5)2015.17802] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 01/24/2014] [Revised: 04/09/2014] [Accepted: 04/15/2014] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND Zoonotic parasite Toxoplasma gondii has a high prevalence in human populations. A suitable vaccine for animals can stop the transmission of infection between animal and human. OBJECTIVES The aim of this study was to evaluate in vivo prepared excretory/secretory antigens (E/SA) as a potential candidate for immunization against the parasite and its effect on the production of transforming growth factor-beta (TGF-β). MATERIALS AND METHODS Toxoplasma gondii tachyzoites were inoculated in the peritoneal cavity of mice and E/SA was harvested and used in animal immunization with and without adjuvant. Serum levels of anti-E/SA antibodies and TGF-β were measured in days 0, 3, 7, 14, 28 and 56 after immunization using ELISA technique. The measurements were statistically analyzed. RESULTS Our results showed that the serum levels of anti-E/SA immunoglobulins significantly increased in all of the immunized groups. The differences of the serum levels of TGF-β between the groups were statistically significant at days 28 and 56 after immunization with E/SA. CONCLUSIONS Based on our study, in vivo prepared E/SA may be considered as a good candidate for animal immunization.
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Affiliation(s)
- Seyed Hossein Abdollahi
- Molecular Medicine Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Fateme Ayoobi
- Physiology and Pharmacology Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Hossein Khorramdelazad
- Molecular Medicine Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Behzad Nasiri Ahmadabadi
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Mohammadtaghi Rezayati
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Mohammad Kazemi Arababadi
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Mohammad Zare-Bidaki
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
- Corresponding author: Mohammad Zare-Bidaki, Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran. Tel: +98-3915234003, Fax: +98-3915225209, E-mail:
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Vazirinejad R, Ayoobi F, Arababadi MK, Eftekharian MM, Darekordi A, Goudarzvand M, Hassanshahi G, Taghavi MM, Ahmadabadi BN, Kennedy D, Shamsizadeh A. Effect of aqueous extract of Achillea millefolium on the development of experimental autoimmune encephalomyelitis in C57BL/6 mice. Indian J Pharmacol 2015; 46:303-8. [PMID: 24987178 PMCID: PMC4071708 DOI: 10.4103/0253-7613.132168] [Citation(s) in RCA: 9] [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] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2013] [Revised: 08/28/2013] [Accepted: 03/20/2014] [Indexed: 11/17/2022] Open
Abstract
Objective: Achillea millefolium (A. millefolium) is widely used as an anti-inflammatory remedy in traditional and herbal medicine. In this study, we investigated the effect of an aqueous extract from A. millefolium on experimental autoimmune encephalomyelitis (EAE) and on the serum cytokine levels in C57BL/6 mice. Materials and Methods: EAE was induced in 63 C57BL/6 mice weighing 20-25 g (8 weeks old). Following immunization, the treatment protocol was initiated by using different doses of an aqueous extract from A. millefolium (1, 5, and 10 mg/mouse/day). Histopathologic assessments were performed by hematoxylin and eosin (H and E) and luxol fast blue (LFB) staining. Behavioral disabilities were recorded by a camera. Serum levels of interleukin (IL)-10, IL-12, and transforming growth factor (TGF)-β were measured using enzyme-linked immunosorbent assay (ELISA). Results: On average, mice developed classical behavioral disabilities of EAE, 13.2 ± 1.9 days following immunization. Treatment of mice with A. millefolium led to delay the appearance of behavioral disabilities along with reduced severity of the behavioral disabilities. Treatment with A. millefolium prevented weight loss and increased serum levels of TGF-β in immunized mice with MOG35-55. EAE-induced mice, which were treated with A. millefolium, had less cerebral infiltration of inflammatory cells. Conclusion: The results demonstrated that treatment with aqueous extract of A. millefolium may attenuate disease severity, inflammatory responses, and demyelinating lesions in EAE-induced mice. In addition, following treatment with A. millefolium, serum levels of TGF-βwere increased in EAE-induced mice.
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Affiliation(s)
- Reza Vazirinejad
- Department of Physiology, Physiology-Pharmacology Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Fateme Ayoobi
- Department of Physiology, Physiology-Pharmacology Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | | | - Mohammad M Eftekharian
- Molecular Medicine Research Center, Faculty of Para Medicine, Hamadan University of Medical Sciences, Hamadan, Iran
| | - Ali Darekordi
- Department of Chemistry, Faculty of Science, Vali-e-Asr University of Rafsanjan, Rafsanjan, Iran
| | - Mahdi Goudarzvand
- Department of Physiology and Pharmacology, Faculty of Medicine, Alborz University of Medical Sciences, Karaj, Iran
| | | | - Mohammad Mohsen Taghavi
- Department of Anatomy, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Behzad Nasiri Ahmadabadi
- Department of Physiology, Physiology-Pharmacology Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
| | - Derek Kennedy
- School of Biomolecular and Physical Science, Eskitis Institute for Cell and Molecular Therapies, Griffith University Nathan, Queensland, Australia
| | - Ali Shamsizadeh
- Department of Physiology, Physiology-Pharmacology Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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Hakimi H, Akhondi MM, Sadeghi MR, Chamani L, Arababadi MK, Ahmadabadi BN, Hassanshahi G, Fathollahi MS. Seminal Levels of IL-10, IL-12, and IL-17 in Men with Asymptomatic Chlamydia Infection. Inflammation 2013; 37:122-6. [DOI: 10.1007/s10753-013-9719-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Ahmadabadi BN, Hassanshahi G, Khoramdelazad H, Mirzaei V, Sajadi SMA, Hajghani M, Khodadadi H, Pourali R, Arababadi MK, Kennedy D. Downregulation of CCR5 expression on the peripheral blood CD8+ T cells of southeastern Iranian patients with chronic hepatitis B infection. Inflammation 2013; 36:136-40. [PMID: 22918850 DOI: 10.1007/s10753-012-9528-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Studies indicated that CC receptor 5 (CCR5), as a receptor for CC ligand 3, CCL4, and CCL5, plays important roles in the recruitment of T cytotoxic lymphocytes to the liver of chronic HBV (CHB)-infected patients. The main purpose of this study was to investigate the expression levels of CCR5 on the CD8(+) T lymphocytes of CHB patients. This clinical study was performed on 63 CHB patients and 96 healthy controls. Flow cytometric analysis was performed to examine the expression of CCR5 on CD8(+) T cells of CHB patients. Real-time PCR was also used for HBV-DNA quantification. The results of our study demonstrated that CCR5 expressing T cytotoxic cells were decreased significantly in CHB patients in comparison to healthy control. Based on our results, it can be concluded that the percent of CCR5(+)/CD8(+) T cells in Iranian CHB patients is significantly decreased, hence their migration to the infected liver, and HBV eradication from the hepatocytes is disrupted.
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Abdollahi SH, Ayoobi F, Khorramdelazad H, Hassanshahi G, Ahmadabadi BN, Rezayati M, Ravary A, Shamsizadeh A, Arababadi MK. Interleukin-10 Serum Levels after Vaccination with In Vivo Prepared Toxoplasma gondii Excreted/Secreted Antigens. Oman Med J 2013; 28:112-5. [PMID: 23599879 DOI: 10.5001/omj.2013.29] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Accepted: 02/14/2013] [Indexed: 11/03/2022] Open
Abstract
OBJECTIVES Toxoplasma gondii is a worldwide prevalent zoonotic parasite which causes toxoplasmosis. An appropriate vaccine for animals could interrupt the circle between animals and humans. Our previous study showed that excreted/secreted antigens (E/SA), derived from the peritoneum of mice infected with T. gondii tachyzoites could be considered as a good candidate for animal vaccination. Interleukin-10 (IL-10) inhibits proliferation of B and T lymphocytes and induces homeostasis in immune system responses. However, since IL-10 has also been shown to suppress the killing of T. gondii by human macrophages, the aim of this study was to evaluate IL-10 serum levels after vaccination with T. gondii E/SA prepared in vivo. METHODS T. gondii tachyzoites were inoculated in the peritoneum of mice and harvested E/SA were used as a vaccine, with and without adjuvant, in T. gondii infected and un-infected mice. IL-10 serum levels were evaluated using the ELISA technique. RESULTS The data showed that although serum levels of IL-10 were not changed at the early phases, they were elevated at the end phases of vaccination with T. gondii E/SA. CONCLUSION Based on these and our previous results, it can be concluded that in vivo prepared T. gondii E/SA could be considered as a good candidate for animal vaccination.
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Affiliation(s)
- Seyed Hossein Abdollahi
- Molecular Medicine Research Center, Rafsanjan University of Medical Science, Rafsanjan, Iran
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Khorramdelazad H, Hassanshahi G, Nasiri Ahmadabadi B, Kazemi Arababadi M. High Serum Levels of TGF-β in Iranians With Chronic HBV Infection. Hepat Mon 2012; 12:e7581. [PMID: 23346151 PMCID: PMC3549612 DOI: 10.5812/hepatmon.7581] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [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: 08/03/2012] [Revised: 09/03/2012] [Accepted: 09/17/2012] [Indexed: 12/11/2022]
Abstract
BACKGROUND The transforming growth factor-β (TGF-β) is an important cytokine with anti-inflammatory properties. OBJECTIVES The main purpose of this study was to compare the serum levels of TGF-β in a group of chronic HBV infected (CHB) patients as well as healthy individuals from South-East of Iran. PATIENTS AND METHODS Sixty patients with CHB as well as sixty healthy individuals were enrolled in the study. ELISA technique was applied to measure the serum levels of TGF-β in both groups. RESULTS Our results revealed that the serum levels of TGF-β were significantly increased in CHB patients in compare to healthy controls. CONCLUSIONS According to this result, it may be concluded that high serum levels of TGF-β may be a mechanism by which immune response against HBV is suppressed.
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Affiliation(s)
- Hossein Khorramdelazad
- Molecular Medicine Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | | | - Behzad Nasiri Ahmadabadi
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Mohammad Kazemi Arababadi
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
- Corresponding author: Mohammad Kazemi Arababadi, Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran. Tel.: +98-3915234003-5, Fax: +98-3915225209, E-mail:
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Ahmadabadi BN, Hassanshahi G, Arababadi MK, Leanza C, Kennedy D. The IL-10 promoter polymorphism at position -592 is correlated with susceptibility to occult HBV infection. Inflammation 2012; 35:818-21. [PMID: 21901441 DOI: 10.1007/s10753-011-9381-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Occult hepatitis B infection (OBI) is characterized as a form of hepatitis in which detectable amounts of HBV-DNA can be monitored in the peripheral blood of patients whereas the hepatitis B surface antigen is undetectable. The main aim of this study was to investigate whether there is a relationship between OBI and single nucleotide polymorphisms in the -592 region of the IL-10 gene. In this study, the polymorphism at position -592 of the IL-10 promoter of 57 OBI cases was compared and correlated to that of 100 healthy controls by PCR-RFLP techniques. Our results showed that patient and control groups had significant differences regarding genotypes and alleles of the -592 polymorphism in the IL-10 gene. Based on our results, it can be concluded that the -592 polymorphism within the promoter of the IL-10 gene is associated with OBI.
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Arababadi MK, Reza Mirzaei M, Ali Sajadi SM, Hassanshahi G, Ahmadabadi BN, Salehabadi VA, Derakhshan R, Kennedy D. Interleukin (IL)-10 gene polymorphisms are associated with type 2 diabetes with and without nephropathy: a study of patients from the southeast region of Iran. Inflammation 2012; 35:797-802. [PMID: 21909800 DOI: 10.1007/s10753-011-9376-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The impact of several environmental and genetic factors on diabetes and its complications is well documented. It has also been established that cytokines play a key role in the regulation of immune responses which have been shown to be important in the pathogenesis of diabetes. Studies showed that single-nucleotide polymorphisms within the -592 region of interleukin-10 (IL-10) are associated with the regulation of its expression. In this study, we aimed to find polymorphisms of this region that may be associated to type 2 diabetic (T2D) patients with and without nephropathy. In this study, peripheral blood samples were collected from 100 T2D patients without nephropathy, 100 T2D patients with nephropathy, and 100 healthy controls. DNA was extracted, and a polymerase chain reaction-restriction fragment length polymorphism technique was performed to examine the polymorphisms within the -592 region of the IL-10 gene. Our results showed a significant difference between the genotypes and alleles of the -592 region of IL-10 in nephropathic and non-nephropathic patients in comparison to the healthy controls. The differences between the two patient groups in relation to genotypes and alleles were not significant. Results of this study suggest that the functional gene polymorphism of IL-10 reported here may play an important role in the pathogenesis of diabetes, but it seems that these polymorphisms do not have an effect on the nephropathic complications of the disease.
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Affiliation(s)
- Mohammad Kazemi Arababadi
- Department of Microbiology, Hematology and Immunology, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
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Arababadi MK, Nasiri Ahmadabadi B, Yousefi Daredor H, Kennedy D. Epidemiology of occult hepatitis B infection among thalassemic, hemophilia, and hemodialysis patients. Hepat Mon 2012; 12:315-9. [PMID: 22783342 PMCID: PMC3389356 DOI: 10.5812/hepatmon.5934] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 09/28/2011] [Accepted: 04/24/2012] [Indexed: 12/11/2022]
Abstract
CONTEXT Hepatitis B virus (HBV) is the most common disease commuted through blood transfusion. Occult hepatitis B infection (OBI) is a form of the disease which does not present Hepatitis B surface antigens (HBsAg) in the serum of patients; however, HBV-DNA is detectable in the serum and hepatocytes of patients. OBI is an important risk factor to induce post transfusion hepatitis (PTH), cirrhosis, hepatocellular carcinoma (HCC) and reactivation of the HBV. Recently, several reports from various regions of the world have been published regarding PTH among blood recipients as well as HCC, and cirrhosis among patients who require permanent blood transfusion, including diseases such as hemophilia, hemodialysis and thalassemia. This form of the hepatitis also creates problems for individuals that are co-infected with other viruses such as HCV and HIV. To determine the prevalence of OBI among hemophilia, hemodialysis and thalassemia patients is important because it is a high risk factor for PTH, HCC and cirrhosis therefore, its detection is a critical strategy for most health care services. This review addresses recent information regarding prevalence of OBI in relation to the mentioned diseases. EVIDENCE ACQUISITION The data presented here was collected by searching the key words in Pubmed and Scopous databases. RESULTS Our searching in the published papers revealed that OBI prevalence is frequent in patients receiving frequent blood transfusions. CONCLUSIONS it seems that one of the main mechanisms for OBI transmission is most likely through infected blood and its component and evaluation of the prevalence of OBI in donors and patients, especially those with hemophilia and thalassemia should be foul considered.
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Affiliation(s)
- Mohammad Kazemi Arababadi
- Department of Microbiology, Hematology and Immunology, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
- Corresponding author: Mohammad Kazemi Arababadi, Department of Microbiology and Immunology, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran. Tel.: +98-39152340035, Fax: +98-3915225209, E-mail:
| | - Behzad Nasiri Ahmadabadi
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Hassan Yousefi Daredor
- Department of Biochemistry, Rafsanjan University of Medical Sciences, Rafsanjan, IR Iran
| | - Derek Kennedy
- Schools of Biomolecular and Physical Science, Griffith University Nathan, Queensland, Australia
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Abstract
Hepatitis B is one of the most frequently occurring posttransfusion infections. Occult hepatitis B (OB) is a form of hepatitis B in which, despite the presence of hepatitis B virus (HBV) DNA in the serum and hepatocytes of a carrier, hepatitis B surface antigen is absent. In addition to the risk of transfusion of infection, OB can lead to cirrhosis, hepatic cancer, and reactivation of the viral duplication process in the carrier. The mechanisms responsible for progression of OB are yet to be clarified; however, some investigators have suggested that genetic and immunologic variables may play a significant role in the resistance of some individuals and sensitivity of other patients. This review addresses the current information regarding immunologic status of OB-infected patients.
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Affiliation(s)
- Mohammad Kazemi Arababadi
- Department of Microbiology, Hematology and Immunology, Faculty of Medicine, and Molecular Medicine Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
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Hakimizadeh E, Arababadi MK, Hassanshahi G, Ahmadabadi BN, Hakimi H, Rezaeian M, Salehabadi VA, Yousefidaredor H, Abousaidi H, Kennedy D. Association of -592 region of IL-10 polymorphisms with asthma in south-eastern Iranian patients. Clin Lab 2012; 58:267-271. [PMID: 22582500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Cytokines are considered important factors for the pathogenesis of asthma as they play a key role in the regulation of immune responses. The aim of this study was to investigate the association between this disease and polymorphisms in the -592 region of the IL-10 gene. METHODS This study was carried out on 100 asthmatic patients and 100 healthy controls. PCR-RFLP was applied to examine the polymorphisms in the -592 region of the IL-10 gene. RESULTS Our results showed a significant difference between patients and controls in terms of genotypes and alleles of the -592 region of the IL-10 gene. CONCLUSIONS According to our results, it can be concluded that the IL-10 promoter polymorphisms may play a crucial role in the pathogenesis of asthma.
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Affiliation(s)
- Elham Hakimizadeh
- Physiology and Pharmacology Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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14
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Assar S, Arababadi MK, Mohit M, Ahmadabadi BN, Pumpens P, Khorramdelazad H, Hajghani M, Assar S, Araste M, Nekhei Z, Sendi H, Kennedy D. T helper and B cell escape mutations within the HBc gene in patients with asymptomatic HBV infection: a study from the South-Eastern region of Iran. Clin Lab 2012; 58:53-60. [PMID: 22372345] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
BACKGROUND Escape mutations potentially allow viruses to avoid detection and clearance by the host immune system and may represent a mechanism through which infections may persist in some patients. The association of the mutations in the HBcAg gene with Hepatitis B asymptomatic carriers (ASC) has not been studied adequately. The current study was aimed to investigate HBcAg18-27 CTL epitope mutations in ASC patients in the South-Eastern region of Iran. METHODS 100 ASC patients were selected for this study and screened for HLA-A2 using flow cytometry. HBV-DNA was extracted from the HLA-A2 positive patients and the HBc gene was amplified using PCR. Direct double sequencing was performed to analyse mutations in the HBc gene of HBV isolates from patients with ASC. RESULTS Overall, 25 (25%) of individuals were HLA-A2 positive. Direct double sequencing indicated no mutations in the HBcAg18-27 epitope. However, four mutations within the T helper and three mutations within the B cell epitopes of ASC patients were identified. CONCLUSIONS The lack of mutations within the HBcAg18-27 epitope suggests that the antigenicity of this region is not altered in HBV isolates of our patients and therefore antigen presentation would occur normally to the patient's immune system through HLA-A2. However, in the course of this study we revealed some novel mutations within the T helper and B cell epitopes that may affect the efficiencies of immune response of ASC patients against these novel HBV epitopes.
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Affiliation(s)
- Shokrollah Assar
- Dept. of Microbiology, Hematology and Immunology, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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15
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Assar S, Arababadi MK, Ahmadabadi BN, Salehi M, Kennedy D. Occult hepatitis B virus (HBV) infection: a global challenge for medicine. Clin Lab 2012; 58:1225-1230. [PMID: 23289193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Hepatitis B virus (HBV) is a serious risk as a disease that can be spread through blood transfusion. Occult hepatitis B infection (OBI) is defined in a patient with the presence of HBV-DNA but a lack of HBsAg in the serum and hepatocytes. OBI can be considered as a high potential risk factor for inducing post transfusion hepatitis (PTH), hepatocellular carcinoma (HCC), cirrhosis, and reactivation of the HBV. Recently, several investigations from various regions of the world have reported PTH as well as HCC and cirrhosis among blood recipients with diseases such as thalassemia and other disorders requiring regular hemodialysis. This form of hepatitis also causes complications for individuals that are co-infected with other viruses such as HCV and HIV. Because of its extreme disease potential, OBI can be considered a high risk for PTH, HCC, and cirrhosis. Therefore, an understanding of the prevalence of OBI among blood donors is a critical strategy in most transfusion services. This review addresses the recent information regarding the prevalence of OBI worldwide, with an additional focus on Iranian blood donors.
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Affiliation(s)
- Shokrollah Assar
- Immunology of Infectious Diseases Research Center, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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Azin H, Vazirinejad R, Ahmadabadi BN, Khorramdelazad H, Zarandi ER, Arababadi MK, Karimabad MN, Shamsizadeh A, Rafatpanah H, Hassanshahi G. The SDF-1 3'a genetic variation of the chemokine SDF-1α (CXCL12) in parallel with its increased circulating levels is associated with susceptibility to MS: a study on Iranian multiple sclerosis patients. J Mol Neurosci 2011; 47:431-6. [PMID: 22125123 DOI: 10.1007/s12031-011-9672-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [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: 08/06/2011] [Accepted: 11/06/2011] [Indexed: 12/27/2022]
Abstract
Immune system-related factors are important in pathogenesis of multiple sclerosis. The CXC chemokine SDF-1α (CXCL12) is involved in the immune responses. Hence, the aim of this study was to investigate the association between serum levels of SDF-1α (CXCL12) and its gene polymorphisms at position +801 with multiple sclerosis. In this experimental study, blood samples were collected from 100 multiple sclerosis patients and 100 healthy controls on EDTA pre-coated tubes. DNA was extracted and DNA samples were analyzed for SDF-1α (CXCL12) polymorphisms using PCR-RLFP in patients and controls. The serum levels of SDF-1α (CXCL12) were measured by ELISA. Demographic data were also collected by a questionnaire which was designed specifically for this study. Our results showed a significant difference between the A/A, A/G, and G/G genotype and A and G alleles of polymorphisms at position +801 of SDF-1α (CXCL12). Our results also showed that serum levels of SDF-1α (CXCL12) were markedly higher in patients than healthy controls, but no association was observed between SDF-1α (CXCL12) polymorphism and its serum levels. The results of this study might suggest the serum levels of SDF-1α (CXCL12) and its polymorphism play an important role in pathogenesis of multiple sclerosis. It is also worth noting that these factors could probably use as pivotal biological markers in the diagnosis of MS.
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Affiliation(s)
- Hossein Azin
- Department of Neurology, Ali-ebn-Abitaleb Hospital, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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Arababadi MK, Pourfathollah AA, Jafarzadeh A, Hassanshahi G, Salehi M, Ahmadabadi BN, Kennedy D. Hepatitis B virus genotype, HBsAg mutations and co-infection with HCV in occult HBV infection. Clin Res Hepatol Gastroenterol 2011; 35:554-9. [PMID: 21835725 DOI: 10.1016/j.clinre.2011.04.004] [Citation(s) in RCA: 5] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 03/16/2011] [Accepted: 04/20/2011] [Indexed: 02/04/2023]
Abstract
BACKGROUND The association between mutations in the hepatitis B surface antigen (HBsAg) gene and the occurrence of occult HBV (OBI) in patients has not been studied adequately to determine if the two are correlated. The current study was aimed to investigate HBsAg mutations, the genotype of HBV and co-infection with HCV in OBI in the central part of Iran to determine any possible associations. MATERIAL AND METHODS In this study, 3700 plasma samples were examined for the presence of HBsAg, anti-HBc and HBV-DNA. All HBsAg(-)/anti-HBc(+)/HBV-DNA(+) samples were regarded as OBI. The genotype of HBV was identified using Gap-PCR and RT-PCR was used to determine possible co-infection with HCV. Finally, direct sequencing was performed to analyse mutations within the surface antigen gene of HBV in occult versus acute HBV infection. RESULTS Of the 3700 patient samples analysed, 352 (9.5%) cases were determined to be HBsAg(-)/anti-HBc(+) in which HBV-DNA was detected in 57 (16.1%), these latter patients were classified as OBI. All of the patients studied carried the D genotype. Direct sequencing of the S-gene from occult and acute HBV patients revealed one silent and one glycine to arginine mutation but the acute HBV patients showed an additional mutation (alanine to threonine). All the mutations were outside the range of the α-determinant. Furthermore, none of the OBI patients were co-infected with HCV. CONCLUSIONS The absence of conformational mutations in the α-determinant of HBsAg confirmed that this antigen could be detected by commercial Elisa kits and therefore was not responsible for false negatives during blood screening. However, it can be concluded that suitable amounts of HBsAg were not expressed by HBV in the OBI patients to be detected by Elisa. Low level expression of HBsAg might be related to the D genotype of the virus. Furthermore, our results suggest that OBI is not related to co-infection with HCV.
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Affiliation(s)
- M K Arababadi
- Department of Microbiology, Hematology and Immunology, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran
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Arababadi MK, Pourfathollah AA, Jafarzadeh A, Hassanshahi G, Shamizadeh A, Ahmadabadi BN, Kennedy D. The status of humoral immunity in occult HBV infection in south-eastern Iranian patients. Clin Res Hepatol Gastroenterol 2011; 35:309-14. [PMID: 21310685 DOI: 10.1016/j.clinre.2010.12.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2010] [Revised: 11/29/2010] [Accepted: 12/02/2010] [Indexed: 02/04/2023]
Abstract
BACKGROUND Occult hepatitis B infection (OBI) is characterized as a form of hepatitis in which, despite of absence of detectable HBsAg, HBV-DNA is present in patient's peripheral blood. The aim of this study was to investigate components of humoral immunity during OBI as a possible measure of how patients respond to Hepatitis B viral infections. MATERIAL AND METHODS In this study, HBsAg-/anti-HBc+/HBV-DNA+ samples were assigned as OBI cases and SRID techniques were performed to measure levels of circulating antibodies (IgG, IgM and IgA) as well as C3, C4. In addition, complement system function was assessed by CH50. RESULTS Our results showed that the serum levels of IgG and C4 were significantly lower in OBI patients, while IgM and C3 were higher in patients when compared to healthy controls. Serum levels of IgA and CH50 were not significantly different between OBI patients and controls. DISCUSSION Based on these results, it could be concluded that although OBI patients produced elevated levels of IgM there may be a problem converting and progressing this response to generate enough IgG to overcome HBV infection.
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Affiliation(s)
- Mohammad Kazemi Arababadi
- Department of Microbiology, Hematology and Immunology, Faculty of Medicine, Rafsanjan University of Medical Sciences, Rafsanjan, Iran.
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Arababadi MK, Pourfathollah AA, Jafarzadeh A, Hassanshahi G, Mohit M, Hajghani M, Ahmadabadi BN, Kennedy D. Evaluation of CCR5 Expression on NK Cells in Iranian Patients With Occult Hepatitis B Infection. Lab Med 2010. [DOI: 10.1309/lmauisl84q4srsbt] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Arababadi MK, Mohammadzadeh A, Ahmadabadi BN, Pourfathollah AA, Kennedy D. Are Fas Ligand Polymorphisms Associated With Occult HBV Infection? Lab Med 2010. [DOI: 10.1309/lm7ch48rqrlrdldz] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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