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Perirenal adipose tissues as a human elastin source, and optimize the extraction process.

Eun Hye Lee1, Jun Nyung Lee2, Yun-Sok Ha2

  • 1Joint Institute for Regenerative Medicine, 34986Kyungpook National University, Daegu, South Korea.

Journal of Biomaterials Applications
|December 22, 2022
PubMed
Summary

Human elastin, crucial for tissue repair, is costly and risky. Researchers optimized extracting elastin from discarded perirenal adipose tissue, yielding a safe, pure, and abundant source via a hot alkali method.

Keywords:
adipose tissueelastinhot alkalihumanperirenal

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Extracellular Matrix Research

Background:

  • Elastin, a key extracellular matrix (ECM) protein, exhibits limited natural repair capabilities.
  • Current human elastin sources are expensive and pose disease transmission risks, while animal-derived elastin can trigger immune responses.
  • Perirenal adipose tissue is a readily available, yet discarded, human biomaterial.

Purpose of the Study:

  • To investigate perirenal adipose tissue as a safe and cost-effective source of human elastin.
  • To optimize elastin extraction methods for high purity and yield.
  • To evaluate the characteristics and biological activity of extracted elastin.

Main Methods:

  • Perirenal adipose tissue underwent pre-processing (delipidation and decellularization).
  • Four distinct elastin extraction methods were compared: acidic solvents, neutral salt, organic solvents, and hot alkali.
  • Extracted elastin was analyzed for purity, quantity, amino acid composition, structural integrity (microscopy, FT-IR), and cytotoxicity.

Main Results:

  • The hot alkali method yielded elastin with 64.24% purity, 159.29 mg/g quantity, and a yield of ~6.37%.
  • Extracted elastin exhibited a mesh-like structure, β-sheet secondary structure, and superior characteristics compared to commercial human skin elastin.
  • Alpha-elastin derived from this method demonstrated enhanced cell proliferation and maintained cell properties.

Conclusions:

  • Perirenal adipose tissue is an ideal, safe, and abundant source for human elastin extraction.
  • The optimized pre-processing combined with the hot alkali extraction method is superior for obtaining high-purity and high-quantity elastin.
  • This approach offers a cost-effective and safe alternative for medical and research applications requiring human elastin.