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Related Concept Videos

Elastin is Responsible for Tissue Elasticity01:12

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Proteins are one of the most abundant organic molecules in living systems and have the most diverse range of functions of all macromolecules. Proteins may be structural, regulatory, contractile, or protective. They may serve in transport, storage, or membranes; or they may be toxins or enzymes. Their structures, like their functions, vary greatly. They are all, however, amino acid polymers arranged in a linear sequence.
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Characterization of a Crosslinked Elastomeric-Protein Inspired Polypeptide.

Brigida Bochicchio1, Angelo Bracalello1, Antonietta Pepe1

  • 1Laboratory of Protein-Inspired Materials, Department of Science, University of Basilicata, Potenza, Italy.

Chirality
|July 13, 2016
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Summary

Researchers created a novel biomaterial from protein-inspired polypeptides. Crosslinking enhanced its structure, forming porous networks and nanowires for potential tissue engineering applications.

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AFMSEMcircular dichroismelastinresilin

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Polymer Chemistry

Background:

  • Natural protein-inspired materials offer excellent biocompatibility for tissue engineering.
  • Chimeric polypeptides mimic extracellular matrix (ECM) components like silk, elastin, and collagen.
  • Recombinant polypeptides combining elastin, resilin, and collagen sequences show promise as biomaterials due to self-assembly and biocompatibility.

Purpose of the Study:

  • To chemically crosslink a linear, three-block recombinant polypeptide using 1,6-hexamethylene-diisocyanate (HMDI).
  • To investigate the structural changes and material properties of the crosslinked polypeptide.
  • To assess the potential of the crosslinked material for tissue engineering applications.

Main Methods:

  • Synthesis of a recombinant polypeptide incorporating elastin, resilin, and collagen sequences.
  • Crosslinking of the polypeptide using 1,6-hexamethylene-diisocyanate (HMDI) via primary amine functionalities.
  • Characterization using Circular Dichroism (CD) spectroscopy, Atomic Force Microscopy (AFM), and Scanning Electron Microscopy (SEM).

Main Results:

  • The crosslinked polypeptide exhibited distinct structural features compared to the linear form.
  • Formation of porous networks, thin nanowires, and films was observed in the crosslinked material.
  • Characterization techniques provided insights into the structural morphology of the modified biomaterial.

Conclusions:

  • Crosslinking a specific recombinant polypeptide with HMDI modifies its structural characteristics.
  • The crosslinked material demonstrates potential for forming complex structures like porous networks and nanowires.
  • These findings suggest the crosslinked polypeptide is a promising candidate for advanced biomaterial applications in tissue engineering.