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The effect of pre-polymeric solution and subsequent encapsulation in hydrogel membranes on the stability and biological activity of horse myoglobins.

Abstract: Proteins are biological macromolecules which have a unique spatial conformation. Once this 3D spatial conformation is affected the protein's biological stability and activity can be severely limited. For these reasons, this investigation focuses on the effects of pre-polymeric solution components on the behavior of proteins to be encapsulated by the entrapment technique in anionic, cationic, and neutral hydrogel membranes. Equine skeletal muscle myoglobin (MMb), and equine heart myoglobin (HMb) were employed as model molecules. Three hydrogel morphologies were examined: methacrylic acid-poly(ethylene glycol) dimethacrylate (n=1000) (MAA-PEGDMA1000), dimethylaminoethyl methacrylate-poly(ethylene glycol) dimethacrylate (n=1000) (DMAEM-PEGDMA1000), and poly(ethylene glycol) (200) monomethyl ether methacrylate-poly(ethylene glycol) di-methacrylate (n=1000) (PEGDMA200-PEGDMA1000). Stability of the proteins in the pre-polymeric solution was assessed by UV-vis spectroscopy and the optimized morphologies were synthesized and the biological activity of both heme-proteins was assessed by oxidation-reduction reactions of the heme group. It was observed that while there was no displacement of the Soret bands of the proteins in the pre-polymeric solution, significant blue shifts were observed for the encapsulated proteins. Subsequent oxidation-reduction of the proteins caused shifts of the Soret bands as would be expected. However, the displaced peaks were not at their anticipated wavelengths. Other analyses will be performed on the membranes to better comprehend these results.
Publication Date: 2007-11-16 PubMed ID: 18003154DOI: 10.1109/IEMBS.2007.4353488Google Scholar: Lookup
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  • Journal Article
  • Research Support
  • N.I.H.
  • Extramural

Summary

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The study investigates how pre-polymeric solution components affect the behavior of proteins encapsulated in anionic, cationic, and neutral hydrogel membranes, using equine skeletal muscle myoglobin and equine heart myoglobin as test subjects.

Study Overview

In this study, the researchers are interested in understanding how proteins, particularly equine skeletal muscle myoglobin and equine heart myoglobin, behave when encapsulated in different types of hydrogel membranes. They used three distinct hydrogel morphologies for this purpose and evaluated the stability of the proteins in the pre-polymeric solution using UV-vis spectroscopy. Furthermore, they assessed the biological activity of the encapsulated heme-proteins through oxidation-reduction reactions.

Findings

  • The authors note that while there were no changes observed in the Soret bands of the proteins in the pre-polymeric solution, notable blue shifts were seen for the encapsulated proteins.
  • They also observed that oxidation-reduction of the proteins caused shifts in the Soret bands. This was an expected outcome; however, the peak wavelengths did not align with the expected numbers.

Conclusion and Future Work

The study concluded there were observable changes in proteins once encapsulated in hydrogel membranes. The encapsulation process appears to impact protein stability and biological activity, as evidenced by the shifts in the Soret bands. Despite these findings, the authors acknowledge that further analyses on the membranes are needed to better comprehend the results. The observed deviations in peak wavelengths during oxidation-reduction reactions indicate that there may still be unknown factors at play, highlighting the need for continued research in this area.

Cite This Article

APA
Valentín-Rodríguez C, López-Garriga J, Torres-Lugo M. (2007). The effect of pre-polymeric solution and subsequent encapsulation in hydrogel membranes on the stability and biological activity of horse myoglobins. Annu Int Conf IEEE Eng Med Biol Soc, 2007, 5103-5106. https://doi.org/10.1109/IEMBS.2007.4353488

Publication

ISSN: 2375-7477
NlmUniqueID: 101763872
Country: United States
Language: English
Volume: 2007
Pages: 5103-5106

Researcher Affiliations

Valentín-Rodríguez, Celimar
  • Chemical Engineering Department, University of Puerto Rico, Mayagüez, Mayagüez, PR 00681.
López-Garriga, Juan
    Torres-Lugo, Madeline

      MeSH Terms

      • Animals
      • Biocompatible Materials / chemistry
      • Drug Carriers / chemistry
      • Drug Stability
      • Horses
      • Hydrogels / chemistry
      • Membranes, Artificial
      • Myoglobin / chemistry
      • Polymers / chemistry
      • Solutions

      Grant Funding

      • P20 RR 016470 / NCRR NIH HHS

      Citations

      This article has been cited 0 times.