Cited by 128Hydrogels: synthesis, properties, applicationsTissue Engineering and Regenerative MedicinePolymer Surface Interaction Studies

Vascular endothelial growth factor and dexamethasone release from nonfouling sensor coatings affect the foreign body response

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Norton, L.W., Koschwanez, H.E., Wisniewski, N.A., Klitzman, B., Reichert, W.M.·2007·Journal of Biomedical Materials Research Part A

Abstract

Vascular endothelial growth factor (VEGF) and dexamethasone (DX) release from hydrogel coatings were examined as a means to modify tissue inflammation and induce angiogenesis. Antibiofouling hydrogels for implantable glucose sensor coatings were prepared from 2‐hydroxyethyl methacrylate, N‐vinyl pyrrolidinone, and polyethylene glycol. Microdialysis sampling was used to test the effect of the hydrogel coating on glucose recovery. VEGF‐releasing hydrogel‐coated fibers increased vascularity and inflammation in the surrounding tissue after 2 weeks of implantation compared to hydrogel‐coated fibers. DX‐releasing hydrogel‐coated fibers reduced inflammation compared to hydrogel‐coated fibers and had reduced capsule vascularity compared to VEGF‐releasing hydrogel‐coated fibers. Hydrogels that released both VEGF and DX simultaneously also showed reduced inflammation at 2 weeks implantation; however, no enhanced vessel formation was observed indicating that the DX diminished the VEGF effect. At 6 weeks, there were no detectable differences between drug‐releasing hydrogel‐coated fibers and control fibers. From this study, hydrogel drug release affected initial events of the foreign body response with DX inhibiting VEGF, but once the drug depot was exhausted these effects disappeared. © 2007 Wiley Periodicals, Inc. J Biomed Mater Res, 2007

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  • Norton et al. observed the expected increase in vascularization due to VEGF but no decrease in local inflammation from dexamethasone release.

    “Norton et al. carefully examined the tissue response to VEGF-, DX-, and VEGF/DX-releasing hydrogels in a rat subcutaneous model,191 observing the expected increase in vascularization due to VEGF but no decrease in local inflammation from DX release.”
  • Norton et al. observed no real benefit in reducing the inflammatory response using dexamethasone-releasing PLGA microspheres after 2 or 6 weeks in rat subcutaneous tissue.

    “Norton et al. observed no real benefit in reducing the inflammatory response using DX-releasing PLGA microspheres after 2 or 6 weeks in rat subcutaneous tissue.191”

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Research works printed but not linked: 1

  1. [15]Weast RC, editor. CRC Handbook of Chemistry and Physics. Boca Raton, FL: CRC Press; 1984. [Google Scholar]

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Authors
Norton, L. W., Koschwanez, H. E., Wisniewski, N. A., Klitzman, B., & Reichert, W. M.
Affiliations
Duke University (US)
Corresponding author
Reichert, W.M.
Venue
Journal of Biomedical Materials Research Part A
Publisher
Wiley
Published
2007-01-18
Volume
81A
Issue
4
Pages
858-869
ISSN
  • 1549-3296 (ISSN-L)
  • 1552-4965
OpenAlex
W2104634040
Cited by
128
References
57
Citations by year
2026: 1 · 2025: 2 · 2024: 5 · 2023: 4 · 2022: 1 · 2021: 5 · 2020: 4 · 2019: 11 · 2018: 7 · 2017: 7 · 2016: 7 · 2015: 7 · 2014: 8 · 2013: 12 · 2012: 7
FWCI
5.22
Type
journal article
Language
en
Open access
Locations
  • Journal of Biomedical Materials Research Part A (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institute of General Medical Sciences (T32GM008555)
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK54932, R01DK054932, R56DK054932)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Hydrogels: synthesis, properties, applications
  • Health Sciences › Medicine › Surgery › Tissue Engineering and Regenerative Medicine
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Polymer Surface Interaction Studies
Keywords
vascular endothelial growth factor, dexamethasone, implantable glucose sensor, foreign body reaction, inflammation, angiogenesis, antifouling coatings, polyethylene glycol, 2-hydroxyethyl methacrylate, microdialysis
MeSH terms
Animals, Biological Transport, Blood Vessel Prosthesis, Dexamethasone, Foreign-Body Reaction, Glucose, Inflammation, Male, Polymers, Skin, Sulfones, Rats, Sprague-Dawley, Microdialysis, Neovascularization, Physiologic, Hydrogel, Polyethylene Glycol Dimethacrylate, Vascular Endothelial Growth Factor A, Rats

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