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HLA-DR typing and lymphocyte subset evaluation in rheumatic heart disease: a search for immune response factors.

Abstract：

:Several autoimmune diseases have been associated with increased frequencies of specific histocompatibility (HLA) antigens, particularly for the D (DR) locus, that may be linked to immune response genes. Rheumatic valvular heart disease (RHD) has been postulated to have autoimmune features, but HLA associations have not been established. We, therefore, performed HLA-DR typing in 33 consecutive patients with RHD and in 82 normal blood bank control subjects. We also evaluated the frequencies of lymphocyte subsets by means of monoclonal antibodies and immunofluorescence flow cytometry and made functional correlations for the natural killer cell (NKC) in patient subsets. The DR patterns in RHD were heterogeneous. However, significant differences were noted for DR4 and DR6. DR4 was present in 52% (17 of 33) of RHD patients vs 32% (26 of 82) of control subjects (p less than 0.05). DR6 was present in 6% (2 of 33) of patients vs 26% (21 of 82) of control subjects (p less than 0.02). The associated relative odds of DR4 was 2.3 and the etiologic fraction was 0.30. The relative odds of DR6 was 0.19 and the preventive fraction was 0.21. A distinct clinical profile was not associated with DR4 positivity or DR6 negativity. The frequency of lymphocyte subsets was not significantly changed except for OKT8. Median NKC numbers tended to be higher in RHD patients than in control subjects (p less than 0.05). In contrast, NKC functional activity tended to be lower in RHD; median lymphocyte to target cell (K562 line) ratio resulting in 50% killing (L/T 50) was 20.5 in RHD patients vs 11.5 in control subjects (p = 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)

journal_name

Am Heart J

journal_title

American heart journal

authors

Anastasiou-Nana MI,Anderson JL,Carlquist JF,Nanas JN

doi

10.1016/0002-8703(86)90311-x

subject

Has Abstract

pub_date

1986-11-01 00:00:00

pages

992-7

issue

5

eissn

0002-8703

issn

1097-6744

pii

0002-8703(86)90311-X

journal_volume

112

pub_type

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