Evaluation of ES-derived neural progenitors as a potential source for cell replacement therapy in the gut

BMC Gastroenterology

Pankaj Jay Pasricha²  Kristen M Kahrig¹  Maria-Adelaide Micci¹  Valentina Sasselli¹ 

[1] Division of Gastroenterology and Hepatology, University of Texas Medical Branch, Galveston, TX, USA;Johns Hopkins Center for Neurogastroenterology, Johns Hopkins University School of Medicine, Baltimore, MD, USA

关键词: Stem cell transplantation;    Gastrointestinal motility;    Enteric nervous system;    Embryonic stem cells;   

Others  :  1113016
DOI  :  10.1186/1471-230X-12-81

 received in 2010-10-04, accepted in 2012-06-26,  发布年份 2012

【 摘 要 】

Background

Stem cell-based therapy has recently been explored for the treatment of disorders of the enteric nervous system (ENS). Pluripotent embryonic stem (ES) cells represent an attractive cell source; however, little or no information is currently available on how ES cells will respond to the gut environment. In this study, we investigated the ability of ES cells to respond to environmental cues derived from the ENS and related tissues, both in vitro and in vivo.

Methods

Neurospheres were generated from mouse ES cells (ES-NS) and co-cultured with organotypic preparations of gut tissue consisting of the longitudinal muscle layers with the adherent myenteric plexus (LM-MP).

Results

LM-MP co-culture led to a significant increase in the expression of pan-neuronal markers (βIII-tubulin, PGP 9.5) as well as more specialized markers (peripherin, nNOS) in ES-NS, both at the transcriptional and protein level. The increased expression was not associated with increased proliferation, thus confirming a true neurogenic effect. LM-MP preparations exerted also a myogenic effect on ES-NS, although to a lesser extent. After transplantation in vivo into the mouse pylorus, grafted ES-NS failed to acquire a distinct phenotype al least 1 week following transplantation.

Conclusions

This is the first study reporting that the gut explants can induce neuronal differentiation of ES cells in vitro and induce the expression of nNOS, a key molecule in gastrointestinal motility regulation. The inability of ES-NS to adopt a neuronal phenotype after transplantation in the gastrointestinal tract is suggestive of the presence of local inhibitory influences that prevent ES-NS differentiation in vivo.

【 授权许可】

   
2012 Sasselli et al.;licensee BioMed Central Ltd.

【 图 表 】

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