Tissue adhesive FK506–loaded polymeric nanoparticles for multi–layered nano–shielding of pancreatic islets to enhance xenograft survival in a diabetic mouse model

This study aims to develop a novel surface modification technology to prolong the survival time of pancreatic islets in a xenogenic transplantation model, using 3,4–dihydroxyphenethylamine (DOPA) conjugated poly(lactide–co–glycolide)–poly(ethylene glycol) (PLGA–PEG) nanoparticles (DOPA–NPs) carrying...

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Published inBiomaterials Vol. 154; pp. 182 - 196
Main Authors Pham, Tung Thanh, Nguyen, Tiep Tien, Pathak, Shiva, Regmi, Shobha, Nguyen, Hanh Thuy, Tran, Tuan Hiep, Yong, Chul Soon, Kim, Jong Oh, Park, Pil–Hoon, Park, Min Hui, Bae, Young Kyung, Choi, Jeong Uk, Byun, Youngro, Ahn, Cheol–Hee, Yook, Simmyung, Jeong, Jee–Heon
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier Ltd 01.02.2018
Subjects
Diabetes mellitus
FK506
Islets transplantation
Local delivery
Surface modification
Local delivery
Surface modification
FK506
Islets transplantation
Diabetes mellitus
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Summary:This study aims to develop a novel surface modification technology to prolong the survival time of pancreatic islets in a xenogenic transplantation model, using 3,4–dihydroxyphenethylamine (DOPA) conjugated poly(lactide–co–glycolide)–poly(ethylene glycol) (PLGA–PEG) nanoparticles (DOPA–NPs) carrying immunosuppressant FK506 (FK506/DOPA–NPs). The functionalized DOPA–NPs formed a versatile coating layer for antigen camouflage without interfering the viability and functionality of islets. The coating layer effectively preserved the morphology and viability of islets in a co–culture condition with xenogenic lymphocytes for 7 days. Interestingly, the mean survival time of islets coated with FK506/DOPA–NPs was significantly higher as compared with that of islets coated with DOPA–NPs (without FK506) and control. This study demonstrated that the combination of surface camouflage and localized low dose of immunosuppressant could be an effective approach in prolonging the survival of transplanted islets. This newly developed platform might be useful for immobilizing various types of small molecules on therapeutic cells and biomaterial surface to improve the therapeutic efficacy in cell therapy and regenerative medicine.
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ISSN:0142-9612
1878-5905
DOI:10.1016/j.biomaterials.2017.10.049