Journal Article
Differences in PPD- and mitogen-induced T-cell activation marker expression characterize immunopathology in acute tuberculosis patients
Isaac Acheampong; Difery Minadzi; Edwin F. Laing; Michael Frimpong; Monika M. Vivekanandan; Augustine Yeboah; Ernest Adankwah; Wilfred Aniagyei; Joseph F. Arthur; Millicent Lamptey; Mohammed K. Abass; Francis Kumbel; Francis Osei-Yeboah; Amidu Gawusu; Linda Batsa Debrah; Dorcas O. Owusu; Alexander Debrah; Ertan Mayatepek; Julia Seyfarth; Richard O. Phillips; Marc Jacobsen
European Journal of Clinical Microbiology & Infectious Diseases · Vol. 43, Issue 3 · pp. 611-616 · 2024
Abstract
Impaired T-cell responses to mitogens and high T-cell activation marker (TAM) expression on Mycobacterium tuberculosis –specific T-cells characterize immunopathology in patients with tuberculosis (TB). In a study of patients with TB ( n = 60) and asymptomatic contacts (controls, n = 37), we found that TB patients had higher CD38 + T-cell proportions specific for M. tuberculosis protein (PPD Mtb ), yet total proportions of PPD Mtb -specific T-cells were comparable. Notably, both activated (CD38 + ) and total IFN-γ + T-cells from TB patients had lower mitogen (phytohemagglutinin, PHA)-induced responses. This impaired mitogen response improved the classification efficacy of the TAM-TB assay, especially employing the PPD/PHA-induced T-cell ratio.