High IFN-γ Release and Impaired Capacity of Multi-Cytokine Secretion in IGRA Supernatants Are Associated with Active Tuberculosis.
Interferon gamma (IFN-γ) release assays (IGRAs) detect Mycobacterium tuberculosis (Mtb) infection regardless of the active (ATB) or latent (LTBI) forms of tuberculosis (TB). In this study, Mtb-specific T cell response against region of deletion 1 (RD1) antigens were explored by a microbead multiplex assay performed in T-SPOT TB assay (T-SPOT) supernatants from 35 patients with ATB and 115 patients with LTBI. T-SPOT is positive when over 7 IFN-γ secreting cells (SC)/250 000 peripheral blood mononuclear cells (PBMC) are enumerated. However, over 100 IFN-γ SC /250 000 PBMC were more frequently observed in the ATB group compared to the LTBI group. By contrast, lower cytokine concentrations and lower cytokine productions relative to IFN-γ secretion were observed for IL 4, IL-12, TNF-α, GM-CSF, Eotaxin and IFN-α when compared to LTBI. Thus, high IFN-γ release and low cytokine secretions in relation with IFN-γ production appeared as signatures of ATB, corroborating that multicytokine Mtb-specific response against RD1 antigens reflects host capacity to contain TB reactivation. In this way, testing cytokine profile in IGRA supernatants would be helpful to improve ATB screening strategy including immunologic tests.
UMR1058 INSERM/University Montpellier/EFS, Montpellier, France.|University Montpellier, Montpellier, France.
Séverine
S
Carrère-Kremer
UMR1058 INSERM/University Montpellier/EFS, Montpellier, France.|University Montpellier, Montpellier, France.
Pierre-Alain
PA
Rubbo
UMR1058 INSERM/University Montpellier/EFS, Montpellier, France.|CHRU Montpellier, Departments of Bacteriology-Virology, Montpellier, France.
Amandine
A
Pisoni
CHRU Montpellier, Departments of Bacteriology-Virology, Montpellier, France.
Sophie
S
Bendriss
CHRU Montpellier, Department of Medical Information, Montpellier, France.
Grégory
G
Marin
UMR1058 INSERM/University Montpellier/EFS, Montpellier, France.
Marianne
M
Peries
UMR1058 INSERM/University Montpellier/EFS, Montpellier, France.|University Montpellier, Montpellier, France.
Karine
K
Bolloré
CHRU Montpellier, Departments of Bacteriology-Virology, Montpellier, France.
Dominique
D
Terru
CHRU Montpellier, Departments of Bacteriology-Virology, Montpellier, France.
Sylvain
S
Godreuil
CHRU Montpellier, Department of Pneumology, Montpellier, France.
Arnaud
A
Bourdin
UMR1058 INSERM/University Montpellier/EFS, Montpellier, France.|University Montpellier, Montpellier, France.|CHRU Montpellier, Departments of Bacteriology-Virology, Montpellier, France.
Philippe
P
Van de Perre
UMR1058 INSERM/University Montpellier/EFS, Montpellier, France.|University Montpellier, Montpellier, France.|CHRU Montpellier, Departments of Bacteriology-Virology, Montpellier, France.
Edouard
E
Tuaillon
D000328:Adult; D000368:Aged; D000942:Antigens, Bacterial / Q000378:metabolism; D001426:Bacterial Proteins / Q000378:metabolism; D005260:Female; D006801:Humans; D007371:Interferon-gamma / Q000378:metabolism*; D059425:Interferon-gamma Release Tests / Q000379:methods*; D055985:Latent Tuberculosis / Q000175:diagnosis; D007963:Leukocytes, Mononuclear / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D016017:Odds Ratio; D011933:Reagent Kits, Diagnostic; D014376:Tuberculosis / Q000276:immunology*
D000942:Antigens, Bacterial; D001426:Bacterial Proteins; C093276:ESAT-6 protein, Mycobacterium tuberculosis; D011933:Reagent Kits, Diagnostic; D007371:Interferon-gamma