1. Cannabinoid type 2 receptor (CB2R) distribution in dermatomyositis skin and peripheral blood mononuclear cells (PBMCs) and in vivo effects of LenabasumTM
- Author
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Spandana Maddukuri, Jay Patel, De Anna Diaz, Kristen L. Chen, Maria Wysocka, Christina Bax, Yubin Li, Adarsh Ravishankar, Madison Grinnell, Majid Zeidi, Nithin Reddy, Josef Symon S. Concha, Muhammad M. Bashir, Joyce Okawa, Barbara White, and Victoria P. Werth
- Subjects
CB2R ,Dermatomyositis ,Image mass cytometry ,Lenabasum ,Dendritic cells ,Diseases of the musculoskeletal system ,RC925-935 - Abstract
Abstract Background Lenabasum is a cannabinoid type 2 receptor (CB2R) reverse agonist that demonstrates anti-inflammatory effects in vivo and in vitro in dermatomyositis (DM) and is currently being investigated for therapeutic potential. The purpose of our study is to investigate CB2R distribution as well as the effects of lenabasum in DM. Methods Immunohistochemistry staining (IHC) was utilized to examine immune cell and cytokine production changes in lesional DM skin biopsies from lenabasum and placebo-treated patients. CB2R expression in various immune cell populations within DM skin was investigated with image mass cytometry (IMC), whereas flow cytometry elucidated CB2R expression in DM peripheral blood mononuclear cells (PBMCs) as well as cytokine production by CB2R-expressing cell populations. Results After 12 weeks of lenabasum treatment, IHC staining showed that CD4+ T cells, CB2R, IL-31, IFN-γ, and IFN-β cytokines were downregulated. IFN-γ and IFN-β mRNA decreased in lesional DM skin but not in PBMCs. IMC findings revealed that CB2R was upregulated in DM lesional skin compared to HC skin and DM PBMCs (p
- Published
- 2022
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