Use of l-pNIPAM hydrogel as a 3D-scaffold for intestinal crypts and stem cell tissue engineering

DOSH, Rasha, JORDAN-MAHY, Nikki, SAMMON, Chris and LE MAITRE, Christine L. (2019). Use of l-pNIPAM hydrogel as a 3D-scaffold for intestinal crypts and stem cell tissue engineering. Biomaterials Science, 7 (10), 4310-4324.

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Intestinal stem cells hold great potential in tissue regeneration of the intestine, however, there are key limitations in their culture in vitro. We previously reported a novel synthetic non-biodegradable hydrogel as a 3D culture model for intestinal epithelium using Caco2 and HT29-MTX cells. Here, we investigated the potential of this system as a 3D scaffold for crypts and single intestinal stem cells to support long-term culture and differentiation. Intestinal crypts were extracted from murine small intestines and Lgr5+ stem cells isolated by magnetic activated cell sorting. Crypts and stem cells were suspended within Matrigel or L-pNIPAM for 14 days or suspended within Matrigel for 7 days then released, dissociated, and suspended within, or on L-pNIPAM hydrogel for 28 days. Cellular behaviour and phenotype were determined by histology and immunohistochemistry for stem cell and differentiation markers: Lgr5, E-cadherin MUC2 chromograninA and lysozymes. Isolated crypts and Lgr5+ intestinal stem cells formed enteroids with a central lumen surrounded by multiple crypt-like buds when cultured in Matrigel. In contrast, when crypts and stem cells were directly suspended within, or layered on L-pNIPAM hydrogel under dynamic culture conditions they formed spherical balls of cells, with no central lumen. When enteroids were initially formed in Matrigel from crypts or single Lgr5+ intestinal stem cells and dissociated into small fragments or single cells and transferred to L-pNIPAM hydrogel they formed new larger enteroids with numerous crypt-like buds. These crypt-like buds showed the presence of mucin-producing cells, which resembled goblet cells, scattered throughout their structures. Immunohistochemistry staining also showed the expression of Lgr5 and differentiation markers of all the main intestinal cell types including: enterocytes, goblet cells, enteroendocrine and Paneth cells. This demonstrated that L-pNIPAM hydrogel supported long-term culture of crypts and Lgr5+ stem cells and promoted intestinal cell differentiation.

Item Type: Article
Identification Number:
Page Range: 4310-4324
Depositing User: Colin Knott
Date Deposited: 30 Sep 2019 09:21
Last Modified: 17 Mar 2021 23:46

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