Grape exosome-like nanoparticles induce intestinal stem cells and protect mice from DSS-induced colitis.

By Songwen Ju, J. Mu, T. Dokland, Xiaoying Zhuang, Qi-long Wang, Hong Jiang, Xiaoyu Xiang, Zhong-bin Deng, Baomei Wang, Lifeng Zhang and 6 more. Molecular Therapy, 2013

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Food-derived exosome-like nanoparticles pass through the intestinal tract throughout our lives, but little is known about their impact or function. Here, as a proof of concept, we show that the cells targeted by grape exosome-like nanoparticles (GELNs) are intestinal stem cells whose responses underlie the GELN-mediated intestinal tissue remodeling and protection against dextran sulfate sodium (DSS)-induced colitis. This finding is further supported by the fact that coculturing of crypt or sorted Lgr5⁺ stem cells with GELNs markedly improved organoid formation. GELN lipids play a role in induction of Lgr5⁺ stem cells, and the liposome-like nanoparticles (LLNs) assembled with lipids from GELNs are required for in vivo targeting of intestinal stem cells. Blocking β-catenin-mediated signaling pathways of GELN recipient cells attenuates the production of Lgr5⁺ stem cells. Thus, GELNs not only modulate intestinal tissue renewal processes, but can participate in the remodeling of it in response to pathological triggers.

Subfields: Molecular Biology, Surgery

View Paper: https://www.semanticscholar.org/paper/d133a0cc5acdb7f7f851697e2366279f33b7611a

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