Caveolin Delivered by Ultrasound-Mediated Microbubble Destruction Prevents Endothelial Cell Proliferation

Area of Science:

• Vascular Biology
• Biomedical Engineering
• Drug Delivery

Background:

• Endothelial nitric oxide synthase (eNOS) regulates vascular homeostasis.
• Caveolin-1 (Cav) inhibits eNOS, reducing vascular permeability and angiogenesis, presenting a potential anti-angiogenic therapy.
• Efficient and controlled delivery of Cav remains a challenge.

Purpose of the Study:

• To evaluate the efficacy of antennapedia-Caveolin-1 (AP-Cav) loaded into microbubbles (MBs) delivered via ultrasound-mediated microbubble destruction (UMMD).
• To assess the impact of UMMD-delivered AP-Cav on nitric oxide (NO) production, cell migration, proliferation, and angiogenesis.

Main Methods:

• AP-Cav loaded MBs were delivered to brain endothelial cells (bEnd.3) using UMMD.
• NO production was measured using DAF2-DA.
• Cell migration and proliferation were assessed via wound healing and BrdU assays, respectively.
• Ex-vivo angiogenesis was evaluated in rat aortic rings.

Main Results:

• UMMD delivery of AP-Cav showed enhanced inhibition compared to free AP-Cav.
• AP-Cav delivered by MBs and UMMD increased acetylcholine-induced NO release.
• UMMD-delivered AP-Cav significantly inhibited wound healing, cell proliferation, and angiogenesis in bEnd.3 cells.

Conclusions:

• AP-Cav-loaded MBs combined with UMMD represent a promising administration method for Cav.
• This delivery approach enhances the therapeutic efficacy and cellular specificity of Cav.
• The findings suggest a potential strategy for targeted anti-angiogenic therapies.