Methods to promote Notch signaling at the biomaterial interface and evaluation in a rafted organ culture model.
J Biomed Mater Res A
; 91(2): 436-46, 2009 Nov.
Article
en En
| MEDLINE
| ID: mdl-18985776
ABSTRACT
The Notch signaling pathway is a promising target for controlling cell fate choices at the biomaterial-tissue interface. Building on our previous work in developing Notch-signaling biomaterials, we evaluated various immobilization schemes for Notch ligands, and their effect on human foreskin keratinocytes. A peptide sequence derived from the Jagged-1 DSL-region and immobilized to poly(2-hydroxyethyl methacrylate) (polyHEMA) showed no bioactivity in relation to the Notch-CSL pathway. The full-length Jagged-1 protein immobilized directly to the polyHEMA surface showed activity in signaling the Notch-CSL pathway. However, an indirect affinity immobilization approach yielded a stronger signal. Human keratinocytes plated on bound Jagged-1 showed upregulated involucrin, keratin 10, and loricrin protein expression, with this expression being cell density-dependent. Utilizing a human foreskin rafted organ culture model as a bridge between in vitro and in vivo studies, Jagged-1-modified or control polyHEMA rods were implanted in human foreskin and cultured at the air-medium interface. Keratinocyte proliferation was suppressed and intermediate-stage differentiation promoted in Jagged-1-modified rods compared with control rods. Thus, Notch-signaling biomaterials provide a robust approach to control keratinocyte differentiation and may find application to other progenitor and stem cells.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Técnicas de Cultivo de Órganos
/
Materiales Biocompatibles
/
Proteínas de Unión al Calcio
/
Queratinocitos
/
Péptidos y Proteínas de Señalización Intercelular
/
Receptores Notch
/
Proteínas de la Membrana
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
J Biomed Mater Res A
Asunto de la revista:
ENGENHARIA BIOMEDICA
Año:
2009
Tipo del documento:
Article
País de afiliación:
Estados Unidos