Related Experiment Video
Updated: Jun 15, 2025
A Facile and Eco-friendly Route to Fabricate PolyLactic Acid Scaffolds with Graded Pore Size
Published on: October 17, 2016
Novel collagen gradient membranes with multiphasic structures: Preparation, characterization, and biocompatibility.
Huilin Huang1, Xue Song1, Jiangjiang Zhang1
1State Key Laboratory of Marine Food Processing & Safety Control, College of Food Science and Engineering, Ocean University of China, No.1299, Sansha Road, Qingdao, Shandong Province 266404, PR China.
Tilapia skin collagen gradient membranes, with multiphasic structures, significantly enhance guided tissue regeneration. These biocompatible scaffolds exhibit superior mechanical and hydrophilic properties, promoting cell adhesion and proliferation for tissue repair applications.
Area of Science:
- Biomaterials Science
- Tissue Engineering
- Regenerative Medicine
Background:
- Multiphasic scaffolds are recognized for their superior performance in guided tissue regeneration.
- Homogeneous membranes serve as a baseline for comparison in tissue regeneration studies.
Purpose of the Study:
- To develop and evaluate tilapia skin collagen gradient membranes with multiphasic structures for guided tissue regeneration.
- To compare the efficacy of stepped and linear gradient collagen membranes against homogeneous membranes.
Main Methods:
- Preparation of tilapia skin collagen gradient membranes (stepped and linear) by controlling collagen concentration and freezing rates.
- Characterization of mechanical properties (tensile strength), porosity, hydrophilicity (contact angle), and water absorption.
- Assessment of biocompatibility through acute toxicity and intradermal irritation assays.
- Evaluation of cell behavior (fibroblast and osteoblast adhesion and proliferation) and underlying signaling pathways (TGF-β/Smad and Wnt/β-catenin).
Main Results:
- Gradient membranes demonstrated enhanced tissue regeneration capabilities compared to homogeneous membranes.
- The membranes possessed a dense outer layer and loose inner layer, with tensile strength >250 Kpa and porosity >85%.
- Excellent hydrophilicity (inner layer contact angle <91°) and water absorption (>40 times) were observed.
- Biocompatibility was confirmed, and gradient membranes effectively promoted fibroblast and osteoblast adhesion and proliferation via TGF-β/Smad and Wnt/β-catenin pathways.
Conclusions:
- Tilapia skin collagen gradient membranes with multiphasic structures are effective for guided tissue regeneration.
- These gradient membranes offer a promising combination of structural, mechanical, and biological properties.
- The findings highlight the significant application potential of these biomaterials in regenerative medicine.
