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Zhao X, Younis S, Shi H, Hu S, Zia A, Wong HH, Elliott EE, Chang T, Bloom MS, Zhang W, Liu X, Lanz TV, Sharpe O, Love ZZ, Wang Q, Robinson WH. RNA-seq characterization of histamine-releasing mast cells as potential therapeutic target of osteoarthritis. Clin Immunol 2022; 244:109117. [PMID: 36109004 PMCID: PMC10752578 DOI: 10.1016/j.clim.2022.109117] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/23/2022] [Accepted: 09/01/2022] [Indexed: 01/12/2023]
Abstract
OBJECTIVE Mast cells in the osteoarthritis (OA) synovium correlate with disease severity. This study aimed to further elucidate the role of mast cells in OA by RNA-Seq analysis and pharmacological blockade of the activity of histamine, a key mast cell mediator, in murine OA. METHODS We examined OA synovial tissues and fluids by flow cytometry, immunostaining, single-cell and bulk RNA-Seq, qPCR, and ELISA. Cetirizine, a histamine H1 receptor (H1R) antagonist, was used to treat the destabilization of the medial meniscus (DMM) mouse model of OA. RESULTS Flow cytometry and immunohistology analysis of OA synovial cells revealed KIT+ FcεRI+ and TPSAB1+ mast cells. Single-cell RNA-Seq of OA synovial cells identified the expression of prototypical mast cell markers KIT, TPSAB1, CPA3 and HDC, as well as distinctive markers HPGD, CAVIN2, IL1RL1, PRG2, and CKLF, confirmed by bulk RNA-Seq and qPCR. A mast cell prototypical marker expression score classified 40 OA patients into three synovial pathotypes: mast cell-high, -medium, and -low. Additionally, we detected mast cell mediators including histamine, tryptase AB1, CPA3, PRG2, CAVIN2, and CKLF in OA synovial fluids. Elevated H1R expression was detected in human OA synovium, and treatment of mice with the H1 receptor antagonist cetirizine reduced the severity and OA-related mediators in DMM. CONCLUSION Based on differential expression of prototypical and distinct mast cell markers, human OA joints can be stratified into mast cell-high, -medium, and -low synovial tissue pathotypes. Pharmacologic blockade of histamine activity holds the potential to improve OA disease outcome.
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Affiliation(s)
- Xiaoyi Zhao
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA; Department of Joint Surgery, First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510080, China
| | - Shady Younis
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Hui Shi
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Shu Hu
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Amin Zia
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Heidi H Wong
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Eileen E Elliott
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Tiffany Chang
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Michelle S Bloom
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Wei Zhang
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Xiangyang Liu
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Tobias Volker Lanz
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Orr Sharpe
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Zelda Z Love
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA
| | - Qian Wang
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA.
| | - William H Robinson
- VA Palo Alto Health Care System, Palo Alto, CA 94304, USA; Division of Immunology and Rheumatology, Stanford University School of Medicine, Stanford, CA 94305, USA.
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