BMP-2 Is Involved in Scleral Remodeling in Myopia Development

Area of Science:

• Ophthalmology
• Developmental Biology
• Biochemistry

Background:

• Myopia development involves scleral remodeling, but regulatory factors remain unclear.
• Bone morphogenetic protein-2 (BMP-2) is a key signaling molecule in tissue development and repair.

Purpose of the Study:

• To investigate BMP-2 expression in lens-induced myopia (LIM) and its role in scleral remodeling.
• To evaluate BMP-2's effect on extracellular matrix (ECM) synthesis in human scleral fibroblasts (HSFs).

Main Methods:

• Induced myopia in guinea pigs using lenses, measuring refractive power and axial length.
• Assessed BMP-2 expression in sclera via immunostaining.
• Cultured HSFs with BMP-2 and TGF-β1 to analyze collagen and GAG synthesis.

Main Results:

• Decreased posterior scleral BMP-2 expression observed in myopic eyes.
• BMP-2 expression normalized upon myopia recovery after lens removal.
• BMP-2 treatment upregulated Type I and Type III collagen, GAG, and aggrecan synthesis in HSFs.

Conclusions:

• BMP-2 is implicated in scleral remodeling during both the development and recovery phases of lens-induced myopia.
• BMP-2 influences ECM synthesis and chondrogenesis-associated gene expression in HSFs.