ADAM9 is involved in pathological retinal neovascularization

Area of Science:

• Ophthalmology
• Molecular Biology
• Oncology

Background:

• Pathological ocular neovascularization is a major cause of blindness.
• The underlying mechanisms of neovascularization are not fully understood.
• ADAM9's role in ocular neovascularization requires further investigation.

Purpose of the Study:

• To investigate the role of ADAM9 in mouse models of ocular neovascularization.
• To explore ADAM9's potential as a therapeutic target for neovascular eye diseases and cancer.

Main Methods:

• Used oxygen-induced retinopathy (OIR) and laser-induced choroidal neovascularization (CNV) mouse models.
• Assessed neovascularization and tumor growth in wild-type and Adam9(-/-) mice.
• Utilized cell-based assays to examine ADAM9's effect on membrane protein shedding.

Main Results:

• Adam9(-/-) mice showed significantly reduced pathological neovascularization in OIR and CNV models.
• ADAM9 expression was upregulated in endothelial cells within pathological vascular tufts in OIR.
• Tumor growth was reduced in Adam9(-/-) mice, and ADAM9 overexpression enhanced shedding of key membrane proteins.

Conclusions:

• ADAM9 plays a significant role in pathological ocular neovascularization and tumor growth.
• ADAM9-dependent shedding of membrane proteins, upregulated by reactive oxygen species, contributes to neovascularization.
• ADAM9 is a potential therapeutic target for proliferative retinopathies, CNV, and cancer.