The first US domestic report of disseminated Mycobacterium avium complex and anti-interferon-γ autoantibodies.
J Clin Immunol
; 34(8): 928-32, 2014 Nov.
Article
em En
| MEDLINE
| ID: mdl-25149293
ABSTRACT
INTRODUCTION:
Anti-interferon-γ (IFNγ) autoantibodies have been associated with disseminated mycobacterial infections, mostly in patients from Southeast Asia.PURPOSE:
We studied an American-born, Caucasian female with M. avium complex infection of the subglottic mucosa and brain for underlying etiologies of infection.METHODS:
Plasma was screened for anticytokine autoantibodies using a Luminex-based approach. The ability of patient plasma to block IFNγ-induced STAT1 phosphorylation in normal blood cells was evaluated by flow cytometry with intracellular staining. Plasma inhibition of IFNγ production and IFNγ-induced cytokines in normal and patient blood cells washed of autologous plasma was also evaluated.RESULTS:
Patient plasma contained high-titer IgG anti-IFNγ autoantibodies, primarily of the IgG1 subclass. Patient but not control plasma prevented IFNγ-induced STAT1 phosphorylation and expression of the IFNγ-inducible cytokines tumor necrosis factor (TNF) α and interleukin (IL)-12 in normal blood cells. Patient blood cells washed free of autologous plasma demonstrated normal IFNγ production and response.CONCLUSIONS:
Disseminated nontuberculous mycobacterial infections should always prompt immune evaluation. This first case of disseminated nontuberculous mycobacterial infection and anti-IFNγ autoantibodies in an American-born Caucasian suggests that anti-cytokine autoantibodies are not racially or regionally restricted.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Autoanticorpos
/
Complexo Mycobacterium avium
/
Infecção por Mycobacterium avium-intracellulare
/
Interferon gama
Tipo de estudo:
Diagnostic_studies
Limite:
Adult
/
Female
/
Humans
País/Região como assunto:
America do norte
Idioma:
En
Ano de publicação:
2014
Tipo de documento:
Article