Abstract:
:Perforin is one of the key effector molecules of cytotoxic T cells and natural killer cells. The influence of HLA-DRB1 alleles on peripheral blood perforin-positive CD4, CD8, CD16 and CD 56 cells was studied by flow cytometry. HLA-DRB1 typing was done in normal healthy subjects (NHS: n = 156) and patients with pulmonary tuberculosis (PTB: n = 102) by polymerase chain reaction-based sequence-specific oligonucleotide hybridization method. We observed a significantly decreased percentage of total perforin-positive cells (per(+)) (P = 0.0004); CD8(+)/Per(+) (P = 0.0005); CD16(+)/Per(+) (P = 0.05) and CD 56(+)/Per(+) cells (P = 0.001) in HLA-DR2-positive PTB patients compared to non-DR2 patients. Subtyping of HLA-DR2-positive subjects at the allelic level revealed that the percentage of CD8(+)/Per(+) cells did not differ among DRB1*1501 and DRB1*1502 patients while a trend towards a decreased percentage of CD16(+)/Per(+) and CD 56(+)/Per(+) cells was noticed in DRB1*1501 patients compared to DRB1*1502 patients. The present study suggests that HLA-DR2 may be associated with down-regulation of perforin-positive cytotoxic lymphocytes and natural killer cells in pulmonary tuberculosis.
journal_name
Int J Immunogenetjournal_title
International journal of immunogeneticsauthors
Rajeswari DN,Selvaraj P,Raghavan S,Jawahar MS,Narayanan PRdoi
10.1111/j.1744-313X.2007.00703.xsubject
Has Abstractpub_date
2007-10-01 00:00:00pages
379-84issue
5eissn
1744-3121issn
1744-313Xpii
EJI703journal_volume
34pub_type
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