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Related Concept Videos

Matrix Proteoglycans and Glycoproteins01:21

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Proteoglycans are extensively glycosylated proteins, commonly found in the extracellular matrix, interwoven with collagen fibers. Hyaline cartilage, the most common type of cartilage in the body, consists of short and dispersed collagen fibers associated with large amounts of proteoglycans. These proteoglycans have long negative charges that attract cations, which in turn attract water molecules. This influx of ions and water molecules swells up the proteoglycan like a water-soaked gel that can...
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Related Experiment Video

Updated: Mar 29, 2026

Evaluation of Keratinocyte Proliferation on Two- and Three-dimensional Type I Collagen Substrates
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Differences in cytocompatibility between collagen, gelatin and keratin.

Yanfang Wang1, Weiwei Zhang1, Jiang Yuan1

  • 1Jiangsu Key Laboratory of Biofunctional Materials, College of Chemistry and Materials Science, Nanjing Normal University, Nanjing 210023, P. R. China.

Materials Science & Engineering. C, Materials for Biological Applications
|December 15, 2015
PubMed
Summary

Keratin, collagen, and gelatin were electrospun into nanofibrous mats for tissue engineering. Collagen demonstrated superior cytocompatibility, outperforming gelatin and keratin in cell adhesion and proliferation.

Keywords:
CytocompatibilityElectrospinningKeratinPHBVProtein

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Protein Chemistry

Background:

  • Keratins are intermediate filament proteins abundant in epithelial cells and protective structures.
  • Keratins possess natural cell adhesion sequences (RGD, LDV), suggesting potential in tissue engineering.
  • Collagen and gelatin are well-established biomaterials used in tissue engineering.

Purpose of the Study:

  • To evaluate the cytocompatibility of keratin-based biomaterials.
  • To compare the cytocompatibility of keratin with collagen and gelatin.
  • To assess keratin's suitability for tissue engineering applications.

Main Methods:

  • Blending keratin, collagen, and gelatin with poly(hydroxybutyrate-co-hydroxyvalerate) (PHBV).
  • Fabricating nanofibrous mats via electrospinning.
  • Characterizing composite mats using FE-SEM, ATR-FTIR, XPS, and DMA.
  • Assessing cytocompatibility through cell adhesion, viability (MTT assay), and proliferation (BrDU assay).

Main Results:

  • Collagen exhibited significantly superior cytocompatibility compared to gelatin and keratin.
  • Gelatin demonstrated better cytocompatibility than keratin, though not statistically significant.
  • PHBV/protein composite mats were successfully fabricated and characterized.

Conclusions:

  • Collagen is the most promising protein for enhancing the cytocompatibility of PHBV-based nanofibrous scaffolds.
  • Keratin's cytocompatibility is lower than collagen and gelatin, requiring further investigation for tissue engineering applications.
  • The study provides insights into protein selection for optimizing biomaterial performance in regenerative medicine.