Biocompatibility of nanoporous alumina membranes for immunoisolation.
Biomaterials
; 28(16): 2638-45, 2007 Jun.
Article
in En
| MEDLINE
| ID: mdl-17335895
ABSTRACT
Cellular immunoisolation using semi-permeable barriers has been investigated over the past several decades as a promising treatment approach for diseases such as Parkinson's, Alzheimer's, and Type 1 diabetes. Typically, polymeric membranes are used for immunoisolation applications; however, recent advances in technology have led to the development of more robust membranes that are able to more completely meet the requirements for a successful immunoisolation device, including well controlled pore size, chemical and mechanical stability, nonbiodegradability, and biocompatibility with both the graft tissue as well as the host. It has been shown previously that nanoporous alumina biocapsules can act effectively as immunoisolation devices, and support the viability and functionality of encapsulated beta cells. The aim of this investigation was to assess the biocompatibility of the material with host tissue. The cytotoxicity of the capsule, as well as its ability to activate complement and inflammation was studied. Further, the effects of poly(ethylene glycol) (PEG) modification on the tissue response to implanted capsules were studied. Our results have shown that the device is nontoxic and does not induce significant complement activation. Further, in vivo work has demonstrated that implantation of these capsules into the peritoneal cavity of rats induces a transient inflammatory response, and that PEG is useful in minimizing the host response to the material.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Immunologic Techniques
/
Coated Materials, Biocompatible
/
Nanostructures
/
Aluminum Oxide
/
Membranes, Artificial
Type of study:
Evaluation_studies
Limits:
Animals
Language:
En
Journal:
Biomaterials
Year:
2007
Document type:
Article
Affiliation country:
Estados Unidos