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Cell Growth & Differentiation, Vol 9, Issue 10 827-836, Copyright © 1998 by American Association of Cancer Research


ARTICLES

Genetic elements regulating HES-1 induction in Wnt-1-transformed PC12 cells

PS Issack and EB Ziff
Howard Hughes Medical Institute, Department of Biochemistry and Kaplan Cancer Center, New York University Medical Center, New York 10016, USA.

PC12 cells differentiate in response to nerve growth factor from a chromaffin cell to a sympathetic neuronal phenotype. Wnt-1 is a secreted signaling factor required for development of mammalian midbrain and cerebellum. PC12 cells transformed by Wnt-1 fail to express several differentiation-specific genes in response to nerve growth factor. We have previously shown that HES-1, a negative regulator of neuronal differentiation, is increased in Wnt-1/PC12 cells (P. S. Issack and E. B. Ziff. Altered expression of helix-loop-helix transcriptional regulators and cyclin D1 in Wnt-1-transformed PC12 cells. Cell Growth & Differ., 9: 837-845). Here, we show that the HES-1 promoter is more active in Wnt-1/PC12 cells relative to PC12 and that the binding sites for the transcription factor RBP-J kappa contribute to this induction. We also identify two additional promoter elements required for elevated HES-1 expression. One element binds Wnt-1-induced protein complexes in a sequence-specific manner. Identification of Wnt-1 responsive elements in potential target genes may provide clues to nuclear pathways regulated by Wnt-1.


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HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Cancer Research Clinical Cancer Research
Cancer Epidemiology Biomarkers & Prevention Molecular Cancer Therapeutics
Molecular Cancer Research Cell Growth & Differentiation
Copyright © 1998 by the American Association of Cancer Research.