Skewed inhibitory receptors expression in a TAP2-deficient patient.
Immunol Lett
; 86(2): 149-53, 2003 Apr 03.
Article
en En
| MEDLINE
| ID: mdl-12644316
ABSTRACT
Most of patients suffering from HLA class I deficiency due to mutations in TAP genes show a significative increase of the peripheral minor Vdelta1+ subpopulation of gammadelta T cells. Surface expression of inhibitory receptors (IR) for HLA class I molecules have been mainly attributed to Vdelta2+ gammadelta T clones. In this study we have analysed the expression of these receptors in both subsets of gammadelta T peripheral lymphocytes. We studied 16 healthy controls and a reported case of homozygous TAP2 mutation with a marked increase of Vdelta1+ gammadelta T cells. MICA/B presence in monocytes was also evaluated. In healthy subjects, the expression of CD94 and CD94/NKG2A was higher in the Vdelta2+ subset but cells bearing the IR ILT2 were found increased in the Vdelta1+. The patient Vdelta2+ gammadelta T cells showed the same IR expression than normal controls, in contrast the Vdelta1+ subset presented a special pattern of very high expression of CD94 and ILT2 and low of CD94/NKG2A. The presence of a new IR poorly represented in healthy individuals could account for the selective increase of Vdelta1+ gammadelta T in TAP-deficient patients. MICA/B surface expression in monocytes was not shifted in our patient.
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Bases de datos:
MEDLINE
Asunto principal:
Enfermedades de la Piel
/
Receptores Inmunológicos
/
Subgrupos de Linfocitos T
/
Transportadoras de Casetes de Unión a ATP
/
Granuloma
Límite:
Adult
/
Female
/
Humans
/
Male
Idioma:
En
Revista:
Immunol Lett
Año:
2003
Tipo del documento:
Article
País de afiliación:
España