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Funktionelle Charakterisierung lsc/p115-RhoGEF-gekoppelter Signalwege in der Entwicklung und Funktion des enterischen Nervensystems des oberen gastrointestinalen Trakts.

Antragsteller Dr. Eugen Zizer
Fachliche Zuordnung Gastroenterologie
Molekulare Biologie und Physiologie von Nerven- und Gliazellen
Förderung Förderung von 2013 bis 2019
Projektkennung Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 247486657
 
Erstellungsjahr 2017

Zusammenfassung der Projektergebnisse

In summary, we could demonstrate the essential role of lsc/p115-RhoGEF for the embryonic migration of glial cells and colonization of the upper GI-tract. We were able to show the direct connection between the proliferative activity of glial cells and the lsc/p115-RhoGEF-expression. For the first time the according signalling pathway could be evaluated in detail: the role of lsc/p115-RhoGEF-expression for the GDNF-associated stimulation of glial cells could be demonstrated. One of the most crucial signalling ways that was revealed was the ability of lsc/p115-RhoGEF to neutralize the antiproliferative effect of p53 with breakup of p53-caused cell cycle arrest in the G0/1-phase. Furthermore the proliferative effect of GDNF is strongly linked with JNK-activation and expression of Cyclin D3 and ppm1d. Furthermore the expression pattern of other RhoGEF-proteins was evaluated showing some potential compensating mechanisms (more-expression of intersectin2, ARHGEF2 and 9). Interestingly, the effect of lsc/p115-RhoGEF-expression seems to show some other characteristics, not described before, besides the proliferative effect in glial cells: lsc/p115-RhoGEF seems to show some anti-fibrosis protective effect in murine pancreas. In TGF-alphatransgenic animals lsc/p115-RhoGEF-KO results in amelioration of pro-fibrosis effect linked by TGF-alpha-overexpression. The expression of lsc/p115-RhoGEF in pancreatic stellate cells may play an important role for this connection.

Projektbezogene Publikationen (Auswahl)

 
 

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