Evidence map›Paper›PMID 25522962›Full record

ArticleBiomaterials2015

Linking the foreign body response and protein adsorption to PEG-based hydrogels using proteomics.

Mark D Swartzlander, Christopher A Barnes, Anna K Blakney, Joel L Kaar, Themis R Kyriakides, Stephanie J Bryant

Open access · greenAbstract read
In one paragraph

Article in Biomaterials, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 81 papers.

0numbers the graph read from it
0cells of the map it votes in
81citing papers in PubMed
3.0field-weighted citation impact, top 9% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

81 citing papers in PubMed, 177 citations in OpenAlex.

  1. Review
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  13. Guidance on biomaterials for periodontal tissue regeneration: Fabrication methods, materials and biological considerations.Dental materials : official publication of the Academy of Dental Materials · 2025
    Review
  14. Article
  15. Article
  16. Biomaterial-Based Therapeutic Delivery of Immune Cells.Advanced healthcare materials · 2025
    Review
  17. Review
  18. Article
  19. Article
  20. Review

21 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 2 countries.

Mark D SwartzlanderDepartment of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA; Biofrontiers Institute, University of Colorado, Boulder, CO 80309, USA. Electronic address: Mark.Swartzlander@colorado.edu.
Christopher A BarnesInstitute of Biochemistry, ETH Zürich, Switzerland. Electronic address: barnes@biol.bc.ethz.ch.
Anna K BlakneyDepartment of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA. Electronic address: Blakney@uw.edu.
Joel L KaarDepartment of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA. Electronic address: Joel.Kaar@colorado.edu.
Themis R KyriakidesDepartment of Pathology, Yale University School of Medicine, New Haven, CT 06520, USA. Electronic address: Themis.Kyriakides@yale.edu.
Stephanie J BryantDepartment of Chemical and Biological Engineering, University of Colorado, Boulder, CO 80309, USA; Biofrontiers Institute, University of Colorado, Boulder, CO 80309, USA; Material Science and Engineering Program, University of Colorado, Boulder, CO 80309, USA. Electronic address: Stephanie.Bryant@colorado.edu.
University of Colorado Boulder · USETH Zurich · CHYale University · US

Funding

Surface Analysis Facility for Biomedical ProblemsP41EB002027 · NIBIB · UNIVERSITY OF WASHINGTON · PI CASTNER, DAVID G · 2003 to 2019
$17.6M
The Interplay between Macrophages and Differentiating MSCs in Cell-Laden HydrogelR21AR064436 · NIAMS · UNIVERSITY OF COLORADO · PI BRYANT, STEPHANIE J · 2013 to 2014
$358k
Modulating the Host Response to Tissue Engineering ScaffoldsR03DE019505 · NIDCR · UNIVERSITY OF COLORADO · PI BRYANT, STEPHANIE J · 2010 to 2011
$231k
NIAMS NIH HHS 1R21AR064436NIAMS NIH HHS R21 AR064436NIBIB NIH HHS EB-002027NIBIB NIH HHS P41 EB002027NIDCR NIH HHS 1R03DE019505NIDCR NIH HHS R03 DE019505
6 · The paper itself

Abstract

Poly(ethylene glycol) (PEG) hydrogels with their highly tunable properties are promising implantable materials, but as with all non-biological materials, they elicit a foreign body response (FBR). Recent studies, however, have shown that incorporating the oligopeptide RGD into PEG hydrogels reduces the FBR. To better understand the mechanisms involved and the role of RGD in mediating the FBR, PEG, PEG-RGD and PEG-RDG hydrogels were investigated. After a 28-day subcutaneous implantation in mice, a thinner and less dense fibrous capsule formed around PEG-RGD hydrogels, while PEG and PEG-RDG hydrogels exhibited stronger, but similar FBRs. Protein adsorption to the hydrogels, which is considered the first step in the FBR, was also characterized. In vitro experiments confirmed that serum proteins adsorbed to PEG-based hydrogels and were necessary to promote macrophage adhesion to PEG and PEG-RDG, but not PEG-RGD hydrogels. Proteins adsorbed to the hydrogels in vivo were identified using liquid chromatography-tandem mass spectrometry. The majority (245) of the total proteins (≥300) that were identified was present on all hydrogels with many proteins being associated with wounding and acute inflammation. These findings suggest that the FBR to PEG hydrogels may be mediated by the presence of inflammatory-related proteins adsorbed to the surface, but that macrophages appear to sense the underlying chemistry, which for RGD improves the FBR.

Indexed as

AdsorptionAnimalsCell AdhesionForeign-Body ReactionGene OntologyHydrogelsMacrophagesMaleMice, Inbred C57BLOligopeptidesPolyethylene GlycolsProteinsProteomicsSpectrum Analysisarginyl-glycyl-aspartic acidHydrogelsOligopeptidesPolyethylene GlycolsProteinsForeign body responseHydrogelMacrophageMass spectrometryPoly(ethylene glycol)Protein adsorption

Identifiers

PMID25522962
PMCPMC4629245
OpenAlexW2021703335

What OpenQuestion holds

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Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.