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Updated: Mar 20, 2026
Tissue Engineering: Construction of a Multicellular 3D Scaffold for the Delivery of Layered Cell Sheets
Published on: October 3, 2014
Growth Factor-Free Pre-vascularization of Cell Sheets for Tissue Engineering
Marina Costa1,2, Rogério P Pirraco1,2, Mariana T Cerqueira1,2
13B's Research Group-Biomaterials, Biodegradables, and Biomimetics, University of Minhom, Headquarters of the European Institute of Excellence on Tissue Engineering and Regenerative Medicine, Guimarães, Portugal.
This study presents a novel method for tissue engineering using pre-vascularized cell sheets derived from adipose stromal vascular fraction (SVF) cultured under hypoxia. This growth factor-free approach enhances neo-vascularization for improved therapeutic constructs.
Area of Science:
- Regenerative Medicine
- Biomaterials Science
- Cell Biology
Background:
- Therapeutic efficacy of tissue-engineered constructs is limited by poor inosculation and neo-vascularization.
- Current strategies using endothelial cells and growth factors have not fully resolved this challenge.
- Developing methods for pre-vascularization is crucial for successful tissue engineering.
Purpose of the Study:
- To develop a growth factor-free method for creating pre-vascularized cell sheets for tissue engineering.
- To utilize the stromal vascular fraction (SVF) from adipose tissue combined with hypoxic culture.
- To enhance the angiogenic potential of cell sheets for improved therapeutic outcomes.
Main Methods:
- Isolation of nucleated SVF cells from adipose tissue.
- Culture of SVF cells under hypoxic conditions (5% pO2) for up to 5 days using cell sheet engineering techniques.
- Analysis of cell phenotypes and vascular structure formation using flow cytometry and immunocytochemistry.
Main Results:
- Successful generation of contiguous cell sheets from SVF.
- Demonstration of inherent angiogenic properties within SVF components.
- Formation of branched, complex CD31+ tube-like structures under hypoxic culture.
- Growth factor-free pre-vascularization achieved.
Conclusions:
- A simple and flexible method for generating pre-vascularized cell sheets using SVF and hypoxia is established.
- This approach offers a promising strategy for enhancing neo-vascularization in tissue engineering applications.
- The technique avoids the need for extrinsic growth factors, simplifying the process and potentially reducing costs.
