Improvements in immune/melanocyte biomarkers with JAK3/TEC family kinase inhibitor ritlecitinib in vitiligo

Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved..

BACKGROUND: Vitiligo is an autoimmune depigmenting disorder with no effective and safe treatments. Its pathogenesis is not fully elucidated.

OBJECTIVE: This substudy of a randomized, double-blind, placebo-controlled phase 2b trial (NCT03715829) evaluated effects of ritlecitinib, an oral JAK3/TEC family kinase inhibitor, on skin and blood biomarkers in participants with nonsegmental vitiligo (NSV).

METHODS: Sixty-five adults with NSV participated in the substudy and received daily treatment for 24 weeks with placebo (n = 14) or ritlecitinib with or without a 4-week loading dose: 200 (loading dose)/50 mg (n = 13), 100/50 mg (n = 12), 50 mg (n = 11), 30 mg (n = 8), or 10 mg (n = 6). Skin (lesional and nonlesional) biopsy samples were obtained at baseline and at 4 and 24 weeks. Changes from baseline to weeks 4 and 24 in skin and blood molecular and cellular biomarkers were evaluated by RNA sequencing, quantitative real-time PCR, proteomic analysis, and flow cytometry.

RESULTS: Ritlecitinib-treated groups showed downregulation of immune biomarkers and upregulation of melanocyte-related markers at weeks 4 and 24 compared to baseline and/or placebo. Significant reductions were seen in CD3+/CD8+ T-cell infiltrates, with significant increases in melanocyte markers (tyrosinase; Melan-A) in NSV lesions in the 50 mg ritlecitinib groups (both P < .05). There was significant, dose-dependent downregulation in T-cell activation, NK, cytotoxic, and regulatory markers in lesional skin (IL-2, IL2-RA, IL-15, CCR7, CD5, CRTAM, NCR1, XCL1, KIR3DL1, FASLG, KLRD; P < .05). TH1 and TH2 markers were also downregulated in lesional skin and blood in a dose-dependent manner (P < .05). Changes in immune biomarkers correlated with clinical response.

CONCLUSIONS: Ritlecitinib significantly downregulated proinflammatory biomarkers and increased melanocyte products in skin and blood of participants with NSV, suggesting its potential in treatment. Ritlecitinib-mediated changes positively correlated with clinical response.

Medienart:

E-Artikel

Erscheinungsjahr:

2024

Erschienen:

2024

Enthalten in:

Zur Gesamtaufnahme - volume:153

Enthalten in:

The Journal of allergy and clinical immunology - 153(2024), 1 vom: 13. Jan., Seite 161-172.e8

Sprache:

Englisch

Beteiligte Personen:

Guttman-Yassky, Emma [VerfasserIn]
Del Duca, Ester [VerfasserIn]
Da Rosa, Joel Correa [VerfasserIn]
Bar, Jonathan [VerfasserIn]
Ezzedine, Khaled [VerfasserIn]
Ye, Zhan [VerfasserIn]
He, Wen [VerfasserIn]
Hyde, Craig [VerfasserIn]
Hassan-Zahraee, Mina [VerfasserIn]
Yamaguchi, Yuji [VerfasserIn]
Peeva, Elena [VerfasserIn]

Links:

Volltext

Themen:

Biomarkers
Cytokines
EC 2.7.10.2
Inflammation
JAK
JAK3 protein, human
Janus Kinase 3
Janus kinase inhibitors
Journal Article
Melanocytes
Nonsegmental vitiligo
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Ritlecitinib
Tyrosine kinase
Vitiligo

Anmerkungen:

Date Completed 08.01.2024

Date Revised 16.02.2024

published: Print-Electronic

ClinicalTrials.gov: NCT03715829

Citation Status MEDLINE

doi:

10.1016/j.jaci.2023.09.021

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM362729433