Scaffolds in vascular regeneration: current status.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Vascular Surgery

Background:

• Blood vessels are complex tissues with limited regeneration capacity, necessitating effective vascular substitutes, particularly for small-diameter applications (<6 mm).
• The extracellular matrix (ECM) plays a critical role in native blood vessel structure and function, influencing tissue engineering strategies.
• Current vascular tissue engineering faces challenges in creating conduits that mimic native vessels and regenerate successfully in vivo.

Purpose of the Study:

• To review current scaffold materials and strategies for vascular regeneration.
• To highlight the state-of-the-art in developing vascular conduits for clinical applications.
• To address the ongoing need for functional vascular substitutes in regenerative medicine.

Main Methods:

• Comprehensive review of literature on scaffold materials for vascular regeneration.
• Analysis of natural, synthetic, decellularized, and scaffold-free approaches.
• Evaluation of the applicability of tubular scaffolds for in vivo regeneration.

Main Results:

• Scaffold material choice is paramount for successful vascular regeneration, with diverse options available.
• Tubular scaffolds are under active investigation for in vivo vascular regeneration.
• Creating conduits with adequate endothelialization that regenerate in vivo remains a key challenge in small-diameter vascular tissue engineering.

Conclusions:

• Advancements in scaffold materials are essential for improving vascular regeneration strategies.
• Developing functional vascular substitutes that bridge the gap from laboratory research to clinical practice is a primary goal.
• Further research is needed to address the specific challenges of small-diameter vascular grafts.