Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patients
(Received 5 Oct, 2008; Accepted 14 Feb, 2009)AbstractBackground and purpose: Occult hepatitis B infection (OBI) is defined as a form of hepatitis B that despite absence of detectable HBsAg, HBV-DNA is present in patient’s peripheral blood. Genetic and immunological differences appear to play importa...
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| Format: | Article |
| Language: | English |
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Mazandaran University of Medical Sciences
2009-01-01
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| Series: | Journal of Mazandaran University of Medical Sciences |
| Subjects: | |
| Online Access: | http://www.mazums.ac.ir/index.php?digital_library&do=downloadPdf&sid=701 |
| _version_ | 1818755673032228864 |
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| author | Mohammad Kazemi Arababadi Ali Akbar Pourfathollah Abdollah Jafarzadeh Gholamhossein Hassanshahi Maryam Mohit Masomeh Hajghani Ali Shamsizadeh1 |
| author_facet | Mohammad Kazemi Arababadi Ali Akbar Pourfathollah Abdollah Jafarzadeh Gholamhossein Hassanshahi Maryam Mohit Masomeh Hajghani Ali Shamsizadeh1 |
| author_sort | Mohammad Kazemi Arababadi |
| collection | DOAJ |
| description | (Received 5 Oct, 2008; Accepted 14 Feb, 2009)AbstractBackground and purpose: Occult hepatitis B infection (OBI) is defined as a form of hepatitis B that despite absence of detectable HBsAg, HBV-DNA is present in patient’s peripheral blood. Genetic and immunological differences appear to play important roles in producing OBI. Therefore, this project was aimed to examine the expression of a chemokine receptor (CCR5) on CD8 T cells of OBI patients.Materials and methods: In this experimental study, 3,700 HBsAg- plasma samples were collected. Samples were tested for anti-HBc antibody and all of HBsAg-/anti-HBc+ samples were screened for HBV-DNA by PCR. HBV-DNA positive samples were assigned as OBI cases. Also, flow cytometry analysis was performed to examine the expression of CCR5 on CD8 T cells of OBI patients.Results: Results of current study showed that 352 (9.5%) cases of samples were positive for anti-HBc. Examination of HBsAg-/anti-HBc+ samples for HBV-DNA by PCR showed that 57 (16.1%) cases had HBV-DNA. Flow cytometric studies indicated lymphocytosis in these patients; however, the number of cells which expressed CD8 and CCR5 is decreased significantly in patients, compared to healthy control. In addition to CD8 T cells, the expression of CCR5 is also decreased on all immune cells.Conclusion: One of the chemokine receptors which are expressed by CD8+ T cells is CCR5 and these cells are recruited to infected tissues, including liver by CCR5. Therefore, based on results of this investigation, one may conclude that due to the decreased expression of CCR5, the CD8+ T cells are unable to respond to the chemokines (CCR5 ligands) and, hence, can not immigrate to the infected liver and incorporate in clearance of hepatitis B virus.J Mazand Univ Med Sci 2009; 19(68): 11-18 (Persian) |
| first_indexed | 2024-12-18T05:42:53Z |
| format | Article |
| id | doaj.art-56bcbbe32aa64596a5acc89d674a6182 |
| institution | Directory Open Access Journal |
| issn | 1735-9260 1735-9279 |
| language | English |
| last_indexed | 2024-12-18T05:42:53Z |
| publishDate | 2009-01-01 |
| publisher | Mazandaran University of Medical Sciences |
| record_format | Article |
| series | Journal of Mazandaran University of Medical Sciences |
| spelling | doaj.art-56bcbbe32aa64596a5acc89d674a61822022-12-21T21:19:07ZengMazandaran University of Medical SciencesJournal of Mazandaran University of Medical Sciences1735-92601735-92792009-01-0118681118Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patientsMohammad Kazemi ArababadiAli Akbar PourfathollahAbdollah JafarzadehGholamhossein HassanshahiMaryam MohitMasomeh HajghaniAli Shamsizadeh1(Received 5 Oct, 2008; Accepted 14 Feb, 2009)AbstractBackground and purpose: Occult hepatitis B infection (OBI) is defined as a form of hepatitis B that despite absence of detectable HBsAg, HBV-DNA is present in patient’s peripheral blood. Genetic and immunological differences appear to play important roles in producing OBI. Therefore, this project was aimed to examine the expression of a chemokine receptor (CCR5) on CD8 T cells of OBI patients.Materials and methods: In this experimental study, 3,700 HBsAg- plasma samples were collected. Samples were tested for anti-HBc antibody and all of HBsAg-/anti-HBc+ samples were screened for HBV-DNA by PCR. HBV-DNA positive samples were assigned as OBI cases. Also, flow cytometry analysis was performed to examine the expression of CCR5 on CD8 T cells of OBI patients.Results: Results of current study showed that 352 (9.5%) cases of samples were positive for anti-HBc. Examination of HBsAg-/anti-HBc+ samples for HBV-DNA by PCR showed that 57 (16.1%) cases had HBV-DNA. Flow cytometric studies indicated lymphocytosis in these patients; however, the number of cells which expressed CD8 and CCR5 is decreased significantly in patients, compared to healthy control. In addition to CD8 T cells, the expression of CCR5 is also decreased on all immune cells.Conclusion: One of the chemokine receptors which are expressed by CD8+ T cells is CCR5 and these cells are recruited to infected tissues, including liver by CCR5. Therefore, based on results of this investigation, one may conclude that due to the decreased expression of CCR5, the CD8+ T cells are unable to respond to the chemokines (CCR5 ligands) and, hence, can not immigrate to the infected liver and incorporate in clearance of hepatitis B virus.J Mazand Univ Med Sci 2009; 19(68): 11-18 (Persian)http://www.mazums.ac.ir/index.php?digital_library&do=downloadPdf&sid=701Occult hepatitis B infectionCCR5CD8+ T cellsHBsAgHBV-DNA |
| spellingShingle | Mohammad Kazemi Arababadi Ali Akbar Pourfathollah Abdollah Jafarzadeh Gholamhossein Hassanshahi Maryam Mohit Masomeh Hajghani Ali Shamsizadeh1 Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patients Journal of Mazandaran University of Medical Sciences Occult hepatitis B infection CCR5 CD8+ T cells HBsAg HBV-DNA |
| title | Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patients |
| title_full | Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patients |
| title_fullStr | Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patients |
| title_full_unstemmed | Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patients |
| title_short | Evaluation of expression rate of chemokines receptor CCR5 on peripheral blood CD8+ T cells of occult hepatitis B infected patients |
| title_sort | evaluation of expression rate of chemokines receptor ccr5 on peripheral blood cd8 t cells of occult hepatitis b infected patients |
| topic | Occult hepatitis B infection CCR5 CD8+ T cells HBsAg HBV-DNA |
| url | http://www.mazums.ac.ir/index.php?digital_library&do=downloadPdf&sid=701 |
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