Elevated BMPR2 Expression Amplifies Osteoblast Differentiation in Ankylosing Spondylitis

Overview

Journal J Rheum Dis

Specialty Rheumatology

Date 2023 Sep 22

PMID 37736586

Authors

Sungsin Jo

Seung Hoon Lee

Chanhyeok Jeon

Hye-Ryeong Jo

Eunae Ko

Min Whangbo

Tae-Jong Kim

Ye-Soo Park

Tae-Hwan Kim

Affiliations

Soon will be listed here.

Abstract

Objective: Bone morphogenetic protein receptor type 2 (BMPR2) has been associated with radiographic changes in ankylosing spondylitis (AS), but further characterization of the cellular signaling pathway in osteoprogenitor (OP) is not clearly understood. The aim of this study was to investigate the expression of BMPR2 and bone morphogenetic protein 2 (BMP2)-mediated responsibility in AS.

Methods: We collected 10 healthy control (HC) and 14 AS-OPs derived from facet joints. Subsequently, we then conducted RNA sequencing with two samples per group and selected BMP-related genes. Facet joint tissues and derived primary OPs were evaluated by validation of selected RNA sequencing data, immunohistochemistry, and comparison of osteogenic differentiation potential.

Results: Based on RNA-sequencing analysis, we found that BMPR2 expression is higher in AS-OPs compared to in HC-OPs. We also validated the increased BMPR2 expression in facet joint tissues with AS and its derived OPs in messenger RNA and protein levels. Additionally, primary AS-OPs showed much greater response to osteogenic differentiation induced by BMP2 and a higher capacity for smad1/5/8-induced RUNX2 expression compared to HCs.

Conclusion: The expression of BMPR2 was found to be significantly increased in facet joint tissues of patients with AS. These findings suggest that BMPR2 may play a role in the BMP2-mediated progression of AS.

Citing Articles

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