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Photothermal Ablation Blotting for Capillary-Scale Microvasculature Engineering
Kexin Feng1, Shuaibing Liu1, Ruiyue Zhao1
1Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan, China.
Advanced Materials (Deerfield Beach, Fla.)
|June 5, 2026
Summary
This study introduces a photothermal ablation blotting (PAB) method to engineer perfusable microvascular networks in hydrogels. The technique creates robust, hierarchical vascular channels, improving tissue integration for regenerative medicine applications.
Area of Science:
- Biomaterials Engineering
- Regenerative Medicine
- Tissue Engineering
Background:
- Integrating engineered tissues with host vasculature, especially at the capillary level, is a major challenge.
- Developing methods for creating functional microvascular networks is crucial for graft success.
Purpose of the Study:
- To develop a novel strategy for engineering perfusable, robust, and hierarchically branched microvascular networks within hydrogel matrices.
- To demonstrate the efficacy of this method in supporting vascular integration and tissue remodeling in vivo.
Main Methods:
- Utilized a photothermal ablation blotting (PAB) strategy employing bioresorbable photothermal fibers (PTF) as a sculpting template.
- Engineered microchannels of multiple diameters using sequential near-infrared (NIR) and UV activation.
- Enhanced hydrogel mechanical properties through fiber reinforcement, creating photothermal microchannel hydrogels (PMH).
Main Results:
- The PMH platform demonstrated efficient in vitro perfusion and cellular infiltration.
- In vivo studies using rat subcutaneous and myocardial infarction (MI) models showed successful vascular integration and tissue remodeling.
- The PAB method proved scalable and adaptable for capillary-scale microvasculature engineering.
Conclusions:
- The PAB strategy offers a promising solution for creating functional microvascular networks in engineered tissues.
- This technique has broad applicability in regenerative medicine and soft tissue reconstruction, addressing critical integration bottlenecks.
