UMMS Affiliation

Program in Molecular Medicine

Publication Date

6-1-2015

Document Type

Article

Subjects

Animals; Foreign-Body Reaction; Mice; Mice, Inbred C57BL; Primates

Disciplines

Biomaterials | Biomedical Devices and Instrumentation | Biotechnology | Immunity

Abstract

The efficacy of implanted biomedical devices is often compromised by host recognition and subsequent foreign body responses. Here, we demonstrate the role of the geometry of implanted materials on their biocompatibility in vivo. In rodent and non-human primate animal models, implanted spheres 1.5 mm and above in diameter across a broad spectrum of materials, including hydrogels, ceramics, metals and plastics, significantly abrogated foreign body reactions and fibrosis when compared with smaller spheres. We also show that for encapsulated rat pancreatic islet cells transplanted into streptozotocin-treated diabetic C57BL/6 mice, islets prepared in 1.5-mm alginate capsules were able to restore blood-glucose control for up to 180 days, a period more than five times longer than for transplanted grafts encapsulated within conventionally sized 0.5-mm alginate capsules. Our findings suggest that the in vivo biocompatibility of biomedical devices can be significantly improved simply by tuning their spherical dimensions.

Rights and Permissions

Citation: Nat Mater. 2015 Jun;14(6):643-51. doi: 10.1038/nmat4290. Epub 2015 May 18. Link to article on publisher's site

DOI of Published Version

10.1038/nmat4290

Comments

Full author list omitted for brevity. For the full list of authors, see article.

Author accepted manuscript posted after 6 months as allowed by the publisher's author rights policy at http://www.nature.com/authors/policies/license.html#terms.

Related Resources

Link to Article in PubMed

Keywords

Biomaterials, Biomedical materials, Implants

Journal/Book/Conference Title

Nature materials

PubMed ID

25985456

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