The Effect of Rho Kinase Inhibitors on In Vitro Human Orbital Preadipocytes

Area of Science:

• Ophthalmology
• Endocrinology
• Cell Biology

Background:

• Graves' ophthalmopathy (GO) is characterized by orbital inflammation, fibrosis, and adipogenesis.
• Rho Kinase (ROCK) signaling pathways are implicated in the pathogenesis of GO.

Purpose of the Study:

• To investigate the therapeutic potential of a ROCK inhibitor (KD025) in modulating human orbital adipogenesis, fibroblast proliferation, and fibrosis.
• To assess the impact of KD025 on ROCK expression and downstream signaling in GO orbital tissues.

Main Methods:

• Orbital adipose tissue was obtained from GO patients and controls.
• Adipogenesis was induced in cultured orbital tissues.
• ROCK expression, adipocyte differentiation, and fibrosis markers were measured.
• Tissues were treated with KD025 to evaluate its effects on these processes.

Main Results:

• ROCK expression was elevated in GO tissues compared to controls.
• KD025 treatment dose-dependently reduced orbital adipocyte differentiation.
• KD025 suppressed fibrosis-related gene expression.
• KD025 significantly reduced transforming growth factor beta-mediated signaling.

Conclusions:

• The ROCK inhibitor KD025 effectively reduces ROCK expression in GO orbital tissue.
• KD025 demonstrates potential in mitigating orbital adipocyte differentiation and fibrosis associated with GO.