Interplay of DDP4 and IP-10 as a Potential Mechanism for Cell Recruitment to Tuberculosis Lesions

Thomas Blauenfeldt (1) , Linda Petrone (2) , Franca del Nonno (2) , Andrea Baiocchini (2) , Laura Falasca (2) , Teresa Chiacchio (2) , Vincent Bondet (3) , Valentina Vanini (2) , Fabrizio Palmieri (2) , Gianni Galluccio (4) , Armanda Casrouge (3) , Jesper Eugen-Olsen (5) , Matthew Albert (3, 6) , Delia Goletti (2) , Darragh Duffy (3) , Morten Ruhwald (1)

1 Statens Serum Institut [Copenhagen]
2 INMI - Istituto Nazionale di Malattie Infettive "Lazzaro Spallanzani"
3 Immunobiologie des Cellules dendritiques
4 Ospedale San Camillo-Forlanini
5 Hvidovre Hospital
6 Genentech, Inc.

Mycobacterium tuberculosis is one of the world's most successful pathogens equipped to establish itself within the human host as a subclinical infection without overt disease. Unable to eradicate the bacteria, the immune system contains the infection in a granuloma structure. Th1 cells that are essential for infection control are recruited to the site of infection directed by chemokines, predominantly CXCL10. It has previously been shown that CXCL10 in the plasma of patients chronically infected with hepatitis C virus is present primarily in an antagonist form. This is due to N-terminal truncation by the enzyme DPP4, which results in the antagonist form that is capable of binding its receptor CXCR3, but does not induce signaling. We aimed to explore whether such CXCL10 antagonism may have an impact on the pathogenesis of tuberculosis (TB).

Keywords: CXCL10; DPP4/CD26; bronchoalveolar lavage fluid; cytokines; pulmonary; tuberculosis

Domains: Life Sciences [q-bio]; Immunology

Thomas Blauenfeldt, Linda Petrone, Franca del Nonno, Andrea Baiocchini, Laura Falasca, et al.. Interplay of DDP4 and IP-10 as a Potential Mechanism for Cell Recruitment to Tuberculosis Lesions. Frontiers in Immunology, 2018, 9, pp.1456. ⟨10.3389/fimmu.2018.01456⟩. ⟨pasteur-01880326⟩