Cited 0 times in Scipus Cited Count

Interrupting an IFN- 3-dependent feedback loop in the syndrome of pyogenic arthritis with pyoderma gangrenosum and acne

Authors
Lee, W | Stone, DL | Hoffmann, P | Rosenzweig, S | Tsai, WL | Gadina, M | Romeo, T | Lee, CR | Randazzo, D | Pimpale Chavan, P | Manthiram, K | Canna, S | Park, YH  | Ombrello, AK | Aksentijevich, I | Kastner, DL | Chae, JJ
Citation
Annals of the rheumatic diseases, 83(6). : 787-798, 2024
Journal Title
Annals of the rheumatic diseases
ISSN
0003-49671468-2060
Abstract
Objectives To study the molecular pathogenesis of PAPA (pyogenic arthritis, pyoderma gangrenosum and acne) syndrome, a debilitating hereditary autoinflammatory disease caused by dominant mutation in PSTPIP1. Methods Gene knock-out and knock-in mice were generated to develop an animal model. THP1 and retrovirally transduced U937 human myeloid leukaemia cell lines, peripheral blood mononuclear cells, small interfering RNA (siRNA) knock-down, site-directed mutagenesis, cytokine immunoassays, coimmunoprecipitation and immunoblotting were used to study inflammasome activation. Cytokine levels in the skin were evaluated by immunohistochemistry. Responsiveness to Janus kinase (JAK) inhibitors was evaluated ex vivo with peripheral blood mononuclear cells and in vivo in five treatment-refractory PAPA patients. Results The knock-in mouse model of PAPA did not recapitulate the human disease. In a human myeloid cell line model, PAPA-associated PSTPIP1 mutations activated the pyrin inflammasome, but not the NLRP3, NLRC4 or AIM2 inflammasomes. Pyrin inflammasome activation was independent of the canonical pathway of pyrin serine dephosphorylation and was blocked by the p.W232A PSTPIP1 mutation, which disrupts pyrin-PSTPIP1 interaction. IFN-γpriming of monocytes from PAPA patients led to IL-18 release in a pyrin-dependent manner. IFN-γwas abundant in the inflamed dermis of PAPA patients, but not patients with idiopathic pyoderma gangrenosum. Ex vivo JAK inhibitor treatment attenuated IFN- 3-mediated pyrin induction and IL-18 release. In 5/5 PAPA patients, the addition of JAK inhibitor therapy to IL-1 inhibition was associated with clinical improvement. Conclusion PAPA-associated PSTPIP1 mutations trigger a pyrin-IL-18-IFN-γpositive feedback loop that drives PAPA disease activity and is a target for JAK inhibition.
Keywords

MeSH

DOI
10.1136/ard-2023-225085
PMID
38408849
Appears in Collections:
Journal Papers > School of Medicine / Graduate School of Medicine > Microbiology
Ajou Authors
박, 용환
Full Text Link
Files in This Item:
38408849.pdfDownload
Export

qrcode

해당 아이템을 이메일로 공유하기 원하시면 인증을 거치시기 바랍니다.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse