Combinatorial interaction among signaling pathways is believed to determine hemopoietic cell fate. Notch proteins are a wide-expressed family of transmembrane receptors that have been shown to influence cell fate decisions and tumorigenesis in multiple systems, including T cells. We previously generated Notch3-IC transgenic mice and demonstrated that altered Notch3 signaling impairs the developmentally regulated interplay between pre-TCR and NF-jB signalling and allows the disruption of thymocyte differentiation and the development of T cell leukaemia. Moreover, by utilizing Notch3-IC transgenic mice and Notch3-IC/pTa-/- double mutant mice, which do not develop leukemia, we demonstrated that, while pre-TCR is required for thymocytes proliferation and leukemogenesis, it is dispensable for Notch3-induced thymocyte differentiation. We will discuss new genetic and biochemical evidence that Notch3, depending on its interaction with pre- TCR, triggers multiple NF-jB activation pathways and regulates SCL/Tal1 and Ikaros transcription factor functions, thus regulating early T cell differentiation and leukemogenesis. We also will show that cooperation between Notch3 and pTa appears to be required for correct development and function of T regulatory cells, thus suggesting its role in lineage fate decision.

Notch3 and pre-TCR interaction differentially regulate T cell development and leukemogenesis / Bellavia, Diana; Campese, Antonio Francesco; Talora, Claudio; Checquolo, Saula; Vacca, Alessandra; Felli, MARIA PIA; Gulino, Alberto; Screpanti, Isabella. - In: IMMUNOLOGY. - ISSN 0019-2805. - STAMPA. - 120:1(2007), pp. 33-33. (Intervento presentato al convegno Annual Congress of the British-Society-of-Immunology tenutosi a Glasgow, SCOTLAND nel FEB 20-23, 2007).

Notch3 and pre-TCR interaction differentially regulate T cell development and leukemogenesis

BELLAVIA, Diana;CAMPESE, Antonio Francesco;TALORA, Claudio;CHECQUOLO, Saula;VACCA, Alessandra;FELLI, MARIA PIA;GULINO, Alberto;SCREPANTI, Isabella
2007

Abstract

Combinatorial interaction among signaling pathways is believed to determine hemopoietic cell fate. Notch proteins are a wide-expressed family of transmembrane receptors that have been shown to influence cell fate decisions and tumorigenesis in multiple systems, including T cells. We previously generated Notch3-IC transgenic mice and demonstrated that altered Notch3 signaling impairs the developmentally regulated interplay between pre-TCR and NF-jB signalling and allows the disruption of thymocyte differentiation and the development of T cell leukaemia. Moreover, by utilizing Notch3-IC transgenic mice and Notch3-IC/pTa-/- double mutant mice, which do not develop leukemia, we demonstrated that, while pre-TCR is required for thymocytes proliferation and leukemogenesis, it is dispensable for Notch3-induced thymocyte differentiation. We will discuss new genetic and biochemical evidence that Notch3, depending on its interaction with pre- TCR, triggers multiple NF-jB activation pathways and regulates SCL/Tal1 and Ikaros transcription factor functions, thus regulating early T cell differentiation and leukemogenesis. We also will show that cooperation between Notch3 and pTa appears to be required for correct development and function of T regulatory cells, thus suggesting its role in lineage fate decision.
2007
Annual Congress of the British-Society-of-Immunology
04 Pubblicazione in atti di convegno::04c Atto di convegno in rivista
Notch3 and pre-TCR interaction differentially regulate T cell development and leukemogenesis / Bellavia, Diana; Campese, Antonio Francesco; Talora, Claudio; Checquolo, Saula; Vacca, Alessandra; Felli, MARIA PIA; Gulino, Alberto; Screpanti, Isabella. - In: IMMUNOLOGY. - ISSN 0019-2805. - STAMPA. - 120:1(2007), pp. 33-33. (Intervento presentato al convegno Annual Congress of the British-Society-of-Immunology tenutosi a Glasgow, SCOTLAND nel FEB 20-23, 2007).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/501328
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