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Updated: May 3, 2026

Micropatterning and Assembly of 3D Microvessels

Micropatterning and Assembly of 3D Microvessels

Published on: September 9, 2016

Polymer scaffolds for small-diameter vascular tissue engineering.

Haiyun Ma¹, Jiang Hu¹, Peter X Ma²

¹Department of Biologic and Materials Sciences, University of Michigan, Ann Arbor, MI, 48109-1078.

Advanced Functional Materials

|February 7, 2014

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Novel biodegradable scaffolds made from poly(L-lactic acid) (PLLA) were created using thermally induced phase separation (TIPS) for small-diameter blood vessel tissue engineering. These scaffolds feature controlled gradient microtubular structures to enhance cell growth and blood vessel regeneration.

Area of Science:

Biomaterials Science
Tissue Engineering
Polymer Chemistry

Background:

Small-diameter blood vessel tissue engineering requires advanced scaffold materials.
Biodegradable polymers offer promising solutions for regenerative medicine.
Current methods face challenges in mimicking native vascular structures.

Purpose of the Study:

To fabricate novel poly(L-lactic acid) (PLLA) scaffolds for small-diameter blood vessel tissue engineering.
To develop scaffolds with controlled gradient microtubular and nanofibrous structures.
To enhance cell seeding, mass transfer, and vascular regeneration.

Main Methods:

Utilized thermally induced phase separation (TIPS) techniques with biodegradable PLLA.
Employed benzene and benzene/tetrahydrofuran mixtures as solvents.

Keywords:

PLLA blood vessel scaffold nanofiber orientation thermally induced phase separation

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Last Updated: May 3, 2026

Micropatterning and Assembly of 3D Microvessels

Micropatterning and Assembly of 3D Microvessels

Published on: September 9, 2016

Implantation of Electrospun Vascular Grafts with Optimized Structure in a Rat Model

Implantation of Electrospun Vascular Grafts with Optimized Structure in a Rat Model

Published on: June 27, 2018

Elastomeric PGS Scaffolds in Arterial Tissue Engineering

Elastomeric PGS Scaffolds in Arterial Tissue Engineering

Published on: April 8, 2011

Controlled scaffold architecture (porosity, tubular size, orientation) via polymer concentration, TIPS temperature, and mold thermal conductivity.

Main Results:

Fabricated PLLA scaffolds with oriented gradient microtubular structures (axial or radial).
Achieved control over porosity, tubular size, and microtubule orientation.
Developed nanofibrous scaffolds with interconnected micro-tubular pore networks mimicking extracellular matrix.
Demonstrated adjustability of structural features by varying solvent ratio, temperature, and concentration.

Conclusions:

The developed PLLA scaffolds possess advantageous structural features for small-diameter blood vessel tissue engineering.
Gradient microtubular and nanofibrous structures facilitate cell seeding, growth, and mass transfer.
These novel scaffolds show potential for promoting blood vessel regeneration.