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Dependence receptor UNC5D mediates nerve growth factor depletion–induced neuroblastoma regression
Yuyan Zhu, … , Hirofumi Arakawa, Akira Nakagawara
Yuyan Zhu, … , Hirofumi Arakawa, Akira Nakagawara
Published June 17, 2013
Citation Information: J Clin Invest. 2013;123(7):2935-2947. https://doi.org/10.1172/JCI65988.
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Research Article Oncology

Dependence receptor UNC5D mediates nerve growth factor depletion–induced neuroblastoma regression

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Abstract

Spontaneous regression of neuroblastoma (NB) resembles the developmentally regulated programmed cell death (PCD) of sympathetic neurons. Regressing tumor cells express high levels of the nerve growth factor (NGF) receptors TRKA and p75NTR and are dependent on NGF for survival; however, the underlying molecular mechanism remains elusive. Here, we show that UNC5D, a dependence receptor that is directly targeted by p53 family members, is highly expressed in favorable NBs. NGF withdrawal strongly upregulated UNC5D, E2F1, and p53 in human primary favorable NBs. The induced UNC5D was cleaved by caspases 2/3, and the released intracellular fragment translocated into the nucleus and interacted with E2F1 to selectively transactivate the proapoptotic target gene. The cleavage of UNC5D and its induction of apoptosis were strongly inhibited by addition of netrin-1. Unc5d–/– mice consistently exhibited a significant increase in dorsal root ganglia neurons and resistance to NGF depletion–induced apoptosis in sympathetic neurons compared with wild-type cells. Our data suggest that UNC5D forms a positive feedback loop with p53 and E2F1 to promote NGF dependence–mediated PCD during NB regression.

Authors

Yuyan Zhu, Yuanyuan Li, Seiki Haraguchi, Meng Yu, Miki Ohira, Toshinori Ozaki, Atsuko Nakagawa, Toshikazu Ushijima, Eriko Isogai, Haruhiko Koseki, Yohko Nakamura, Cuize Kong, Patrick Mehlen, Hirofumi Arakawa, Akira Nakagawara

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