Increased enteric neural crest cell differentiation after transplantation into aganglionic mouse gut

Area of Science:

• Stem cell therapy
• Developmental biology
• Gastroenterology

Background:

• Stem cell-based therapies show promise for Hirschsprung's disease (HD).
• The behavior of transplanted enteric neural crest-derived cells (ENCCs) in aganglionic guts requires further investigation.
• Understanding ENCCs' migration, proliferation, and differentiation is crucial for developing effective HD treatments.

Purpose of the Study:

• To compare the behavior of ENCCs transplanted into the aganglionic gut of endothelin receptor B knockout (Ednrb-KO) mice versus wild-type (WT) mice.
• To assess the in vivo behavior of ENCCs in a model relevant to Hirschsprung's disease.

Main Methods:

• ENCCs from Sox10 transgenic mice (Venus-labeled) were isolated at embryonic day 18.5.
• Neurospheres were generated and transplanted into the aganglionic gut of E12.5 Ednrb-KO or WT mice.
• Time-lapse imaging and whole-mount immunohistochemistry were used to evaluate ENCC migration and neuronal differentiation.

Main Results:

• Transplanted ENCCs successfully migrated into the myenteric region of the aganglionic gut in both Ednrb-KO and WT mice.
• Neuronal differentiation (Tuj1-positive/Sox10-positive ratio) increased significantly over 72 hours in Ednrb-KO mice.
• Enhanced neuronal differentiation of transplanted ENCCs was observed in Ednrb-KO mice compared to WT mice at 72 hours.

Conclusions:

• Transplanted ENCCs can migrate to the myenteric region of the aganglionic recipient gut.
• The aganglionic gut microenvironment in Ednrb-KO mice promotes enhanced neuronal differentiation of transplanted ENCCs.
• Further research into the gut microenvironment is essential for advancing cell therapy for Hirschsprung's disease.