Spatial Patterning from an Integrated Wnt/ß-catenin and Notch/Delta Gene Circuit.
Annu Int Conf IEEE Eng Med Biol Soc
; 2018: 5022-5025, 2018 Jul.
Article
em En
| MEDLINE
| ID: mdl-30441469
ABSTRACT
Classically, the Wnt/ß-catenin and Notch /Delta signaling pathways were thought to operate through separate mechanisms, performing distinct roles in tissue patterning. However, it has been shown that b-catenin activates transcription of Hesl, a signaling intermediate in the Notch /Delta pathway that controls its lateral inhibition mechanism. To investigate this non-canonical crosstalk mechanism, a new gene circuit, integrating the two pathways, is proposed and simulated in two-cell and multi-cell environments. This model also captures both Paneth cell- mediated and mesenchymal Wnt production. The simulations verify that the gene circuit is temporally bistable and capable of forming a pattern on a multi-cell grid. Last, the model exhibits a bifurcation based on the steady state concentration of Wnt and the relative amount of control b-catenin has over the Hesl promoter, providing a possible mechanism to explain why a homogeneous population of transit amplifying cells is observed directly above the more diverse stem niche.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Receptores Notch
/
Redes Reguladoras de Genes
/
Via de Sinalização Wnt
/
Fatores de Transcrição HES-1
Tipo de estudo:
Prognostic_studies
Limite:
Humans
Idioma:
En
Revista:
Annu Int Conf IEEE Eng Med Biol Soc
Ano de publicação:
2018
Tipo de documento:
Article