TY - JOUR
T1 - The Notch/Hes1 pathway sustains NF-κB activation through CYLD repression in T cell leukemia
AU - Espinosa, Lluis
AU - Cathelin, Severine
AU - D'Altri, Teresa
AU - Trimarchi, Thomas
AU - Statnikov, Alexander
AU - Guiu, Jordi
AU - Rodilla, Veronica
AU - Inglés-Esteve, Julia
AU - Nomdedeu, Josep
AU - Bellosillo, Beatriz
AU - Besses, Carles
AU - Abdel-Wahab, Omar
AU - Kucine, Nicole
AU - Sun, Shao Cong
AU - Song, Guangchan
AU - Mullighan, Charles C.
AU - Levine, Ross L.
AU - Rajewsky, Klaus
AU - Aifantis, Iannis
AU - Bigas, Anna
PY - 2010/1/1
Y1 - 2010/1/1
N2 - It was previously shown that the NF-κB pathway is downstream of oncogenic Notch1 in T cell acute lymphoblastic leukemia (T-ALL). Here, we visualize Notch-induced NF-κB activation using both human T-ALL cell lines and animal models. We demonstrate that Hes1, a canonical Notch target and transcriptional repressor, is responsible for sustaining IKK activation in T-ALL. Hes1 exerts its effects by repressing the deubiquitinase CYLD, a negative IKK complex regulator. CYLD expression was found to be significantly suppressed in primary T-ALL. Finally, we demonstrate that IKK inhibition is a promising option for the targeted therapy of T-ALL as specific suppression of IKK expression and function affected both the survival of human T-ALL cells and the maintenance of the disease in vivo.
AB - It was previously shown that the NF-κB pathway is downstream of oncogenic Notch1 in T cell acute lymphoblastic leukemia (T-ALL). Here, we visualize Notch-induced NF-κB activation using both human T-ALL cell lines and animal models. We demonstrate that Hes1, a canonical Notch target and transcriptional repressor, is responsible for sustaining IKK activation in T-ALL. Hes1 exerts its effects by repressing the deubiquitinase CYLD, a negative IKK complex regulator. CYLD expression was found to be significantly suppressed in primary T-ALL. Finally, we demonstrate that IKK inhibition is a promising option for the targeted therapy of T-ALL as specific suppression of IKK expression and function affected both the survival of human T-ALL cells and the maintenance of the disease in vivo.
UR - http://www.scopus.com/inward/record.url?scp=77956511912&partnerID=8YFLogxK
U2 - 10.1016/j.ccr.2010.08.006
DO - 10.1016/j.ccr.2010.08.006
M3 - Journal article
C2 - 20832754
AN - SCOPUS:77956511912
SN - 1535-6108
VL - 18
SP - 268
EP - 281
JO - Cancer Cell
JF - Cancer Cell
IS - 3
ER -