Inherited PD-1 deficiency underlies tuberculosis and autoimmunity in a child.

Ogishi M, Yang R, Aytekin C, Langlais D, Bourgey M, Khan T, Ali FA, Rahman M, Delmonte OM, Chrabieh M, Zhang P, Gruber C, Pelham SJ, Spaan AN, Rosain J, Lei WT, Drutman S, Hellmann MD, Callahan MK, Adamow M, Wong P, Wolchok JD, Rao G, Ma CS, Nakajima Y, Yaguchi T, Chamoto K, Williams SC, Emile JF, Rozenberg F, Glickman MS, Rapaport F, Kerner G, Allington G, Tezcan I, Cagdas D, Hosnut FO, Dogu F, Ikinciogullari A, Rao VK, Kainulainen L, Béziat V, Bustamante J, Vilarinho S, Lifton RP, Boisson B, Abel L, Bogunovic D, Marr N, Notarangelo LD, Tangye SG, Honjo T, Gros P, Boisson-Dupuis S, Casanova JL.

Source : Nat Med

2021 Jun 28

Pmid : 34183838


The pathophysiology of adverse events following programmed cell death protein 1 (PD-1) blockade, including tuberculosis (TB) and autoimmunity, remains poorly characterized. We studied a patient with inherited PD-1 deficiency and TB who died of pulmonary autoimmunity. The patient's leukocytes did not express PD-1 or respond to PD-1-mediated suppression. The patient's lymphocytes produced only small amounts of interferon (IFN)-γ upon mycobacterial stimuli, similarly to patients with inborn errors of IFN-γ production who are vulnerable to TB. This phenotype resulted from a combined depletion of Vδ2+ γδ T, mucosal-associated invariant T and CD56bright natural killer lymphocytes and dysfunction of other T lymphocyte subsets. Moreover, the patient displayed hepatosplenomegaly and an expansion of total, activated and RORγT+ CD4-CD8- double-negative αβ T cells, similar to patients with STAT3 gain-of-function mutations who display lymphoproliferative autoimmunity. This phenotype resulted from excessive amounts of STAT3-activating cytokines interleukin (IL)-6 and IL-23 produced by activated T lymphocytes and monocytes, and the STAT3-dependent expression of RORγT by activated T lymphocytes. Our work highlights the indispensable role of human PD-1 in governing both antimycobacterial immunity and self-tolerance, while identifying potentially actionable molecular targets for the diagnostic and therapeutic management of TB and autoimmunity in patients on PD-1 blockade.

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