Carbon monoxide release from ultrasound-sensitive microbubbles improves endothelial cell growth

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Vascular Biology

Background:

• Carbon monoxide (CO) is a gasotransmitter with potential benefits for vascular tissue engineering.
• CO can promote endothelial cell (EC) proliferation and migration.
• Controlled delivery of CO is critical for therapeutic applications, especially for healing disrupted blood-brain barriers.

Purpose of the Study:

• To develop ultrasound-sensitive microbubbles for controlled CO delivery.
• To assess the efficacy of CO-loaded microbubbles in promoting EC proliferation and function.
• To evaluate microbubble stability and CO release triggered by ultrasound.

Main Methods:

• Fabrication of ultrasound-sensitive microbubbles using perfluoropentane.
• Loading microbubbles with carbon monoxide.
• Assessing microbubble stability, biocompatibility, and CO release upon ultrasound application.
• Evaluating EC proliferation, migration, and VE-cadherin expression.
• Testing microbubble rupture and CO delivery using tissue phantoms and ultrasound probes.

Main Results:

• Perfluoropentane microbubbles demonstrated good stability and ultrasound-triggered CO release.
• CO-loaded microbubbles showed good biocompatibility and improved VE-cadherin expression.
• Ultrasound imaging probes efficiently ruptured microbubbles, enhancing EC spreading and proliferation.
• CO-loaded microbubbles significantly improved EC function compared to controls.

Conclusions:

• Ultrasound-sensitive microbubbles represent a promising platform for controlled CO delivery.
• This technology has potential applications in vascular tissue engineering and regenerative medicine.
• The developed microbubbles can effectively enhance endothelialization for improved blood vessel repair.