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Gastroenterology. 2008 May;134(5):1424-35. doi: 10.1053/j.gastro.2008.02.018. Epub 2008 Feb 14.

Characterization of fetal and postnatal enteric neuronal cell lines with improvement in intestinal neural function.

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1
Division of Digestive Diseases, Emory University, Atlanta, Georgia, USA.

Abstract

BACKGROUND & AIMS:

The isolation and culture of primary enteric neurons is a difficult process and yields a small number of neurons. We developed fetal and postnatal enteric neuronal cell lines using H-2K(b)-tsA58 transgenic mice (immortomice) that have a temperature-sensitive mutation of the SV40 large tumor antigen gene under the control of an interferon gamma-inducible H-2K(b) promoter element.

METHODS:

Enteric neuronal precursors were isolated from the intestines of E13-mouse fetuses and second day postnatal mice using magnetic immunoselection with a p75NTR antibody. The cells were maintained at the permissive temperature, 33 degrees C, and interferon-gamma for 24 or 48 hours, and then transferred to 39 degrees C in the presence of glial cell line-derived neurotrophic factor for 7 days for further differentiation. Neuronal markers were assessed by reverse-transcription polymerase chain reaction, Western blot, and immunocytochemistry. Neuronal function was assessed by transplanting these cells into the colons of Piebald or nNOS(-/-) mice.

RESULTS:

Expression analysis of cells showed the presence of neuronal markers peripherin, PGP9.5, HuD, tau, synaptic marker synaptophysin, characteristic receptors of enteric neurons, Ret, and 5-hydroxytryptamine-receptor subtypes at 33 degrees C and 39 degrees C. Nestin, S-100beta, and alpha-smooth muscle actin were expressed minimally at 39 degrees C. Glial cell line-derived neurotrophic factor resulted in increased phosphorylation of Akt in these cells, similar to primary enteric neurons. Transplantation of cells into the piebald or nNOS(-/-) mice colon improved colonic motility.

CONCLUSIONS:

We have developed novel enteric neuronal cell lines that have neuronal characteristics similar to primary enteric neurons. These cells can help us in understanding newer therapeutic options for Hirschsprung's disease.

PMID:
18471518
PMCID:
PMC2612783
DOI:
10.1053/j.gastro.2008.02.018
[Indexed for MEDLINE]
Free PMC Article

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