RBM47 as a potential therapeutic target for thyroid-associated ophthalmopathy

Area of Science:

• Ophthalmology
• Molecular Biology
• Cell Biology

Background:

• Thyroid-associated ophthalmopathy (TAO) is an autoimmune condition affecting the eye orbits.
• RNA-binding motif 47 (RBM47) is an RNA-binding protein implicated in development, immunity, and cancer.
• The role of RBM47 in TAO pathogenesis remains largely unexplored.

Purpose of the Study:

• To investigate the biological functions of RBM47 in thyroid-associated ophthalmopathy (TAO).
• To determine the effect of RBM47 on adipogenesis, inflammation, and fibrosis in orbital fibroblasts (OFs).
• To explore RBM47 as a potential therapeutic target for TAO.

Main Methods:

• Orbital fibroblasts (OFs) were isolated from control and TAO patients.
• RBM47 expression was analyzed using immunohistochemistry, Western blotting (WB), and RT-PCR.
• RBM47 knockdown was performed using small interfering RNA (siRNA).
• Adipogenesis, inflammation, and fibrosis were assessed using Oil Red O staining, ELISA, RT-PCR, and WB.
• Signaling pathways, including IGF-1R and ERK, were investigated.

Main Results:

• RBM47 expression was significantly increased in orbital tissues and OFs from TAO patients.
• RBM47 knockdown reduced adipogenesis and fibrosis in OFs.
• Knockdown of RBM47 downregulated insulin-like growth factor 1 receptor (IGF-1R), proinflammatory molecules, and hyaluronan (HA).
• Reduced RBM47 expression inhibited adipocyte differentiation via the IGF-1R/ERK signaling pathway.

Conclusions:

• RBM47 plays a crucial role in regulating adipogenesis, inflammation, HA production, and fibrosis in TAO.
• RBM47 may promote TAO pathogenesis by upregulating IGF-1R and activating downstream signaling.
• RBM47 represents a promising therapeutic target for managing thyroid-associated ophthalmopathy.