Vascularization in bone tissue engineering: physiology, current strategies, major hurdles and future challenges

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Vascular Biology

Background:

• Bone tissue engineering strategies face challenges due to the absence of a functional vascular supply.
• Current bone grafts rely on post-implant vascularization, often leading to graft failure and poor integration.
• Establishing a microcirculation within engineered constructs is a primary objective in bone tissue engineering.

Purpose of the Study:

• To highlight the critical role of vascular network development in bone tissue engineering.
• To review current research efforts focused on inducing microcirculation in engineered bone constructs.
• To underscore the importance of vascularization for successful bone graft integration.

Main Methods:

• Literature review of current research in bone tissue engineering and vascularization strategies.
• Analysis of studies focusing on methods to promote neovascularization in engineered tissues.
• Synthesis of findings related to the development of functional microvasculature in bone grafts.

Main Results:

• The development of a vascular network is essential for the survival and integration of engineered bone grafts.
• Various strategies are being investigated to pre-vascularize bone constructs, including the use of growth factors and co-culture systems.
• Successful vascularization significantly enhances graft performance and clinical applicability.

Conclusions:

• Overcoming the vascularization challenge is key to advancing bone tissue engineering.
• Continued research into effective vascular network formation is vital for clinical translation.
• Engineered vascularized bone grafts hold significant promise for treating skeletal defects.