Zwitterionically modified alginates mitigate cellular overgrowth for cell encapsulation

Qingsheng Liu, Alan Chiu, Long-Hai Wang, Duo An, Monica Zhong, Alexandra M. Smink, Bart J. de Haan, Paul de Vos, Kevin Keane, Andreas Vegge, Esther Y. Chen, Wei Song, Wendy F. Liu, James Flanders, Claude Rescan, Lars Groth Grunnet, Xi Wang, Minglin Ma*

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

74 Citaten (Scopus)
122 Downloads (Pure)


Foreign body reaction (FBR) to implanted biomaterials and medical devices is common and can compromise the function of implants or cause complications. For example, in cell encapsulation, cellular overgrowth (CO) and fibrosis around the cellular constructs can reduce the mass transfer of oxygen, nutrients and metabolic wastes, undermining cell function and leading to transplant failure. Therefore, materials that mitigate FBR or CO will have broad applications in biomedicine. Here we report a group of zwitterionic, sulfobetaine (SB) and carboxybetaine (CB) modifications of alginates that reproducibly mitigate the CO of implanted alginate microcapsules in mice, dogs and pigs. Using the modified alginates (SB-alginates), we also demonstrate improved outcome of islet encapsulation in a chemically-induced diabetic mouse model. These zwitterion-modified alginates may contribute to the development of cell encapsulation therapies for type 1 diabetes and other hormone-deficient diseases.

Originele taal-2English
Aantal pagina's14
TijdschriftNature Communications
Nummer van het tijdschrift1
StatusPublished - 20-nov-2019

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