NCYM promotes calpain-mediated Myc-nick production in human MYCN-amplified neuroblastoma cells

Journal Article · Fri Jun 05 00:00:00 EDT 2015 · Biochemical and Biophysical Research Communications

DOI:https://doi.org/10.1016/J.BBRC.2015.04.050· OSTI ID:22462069

Shoji, Wataru ^[1]; Suenaga, Yusuke ^[1]; Kaneko, Yoshiki; Islam, S.M. Rafiqul; Alagu, Jennifer ^[1]; Yokoi, Sana ^[2]; Nio, Masaki ^[3]; Nakagawara, Akira ^[1]

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1. Division of Biochemistry and Innovative Cancer Therapeutics and Children's Cancer Research Center, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuo-ku, Chiba 260-8717 (Japan)
2. Cancer Genome Center, Chiba Cancer Center Research Institute, 666-2 Nitona, Chuo-ku, Chiba 260-8717 (Japan)
3. Department of Pediatric Surgery, Graduate School of Medicine, Tohoku University, Sendai 980-8574 (Japan)

NCYM is a cis-antisense gene of MYCN and is amplified in human neuroblastomas. High NCYM expression is associated with poor prognoses, and the NCYM protein stabilizes MYCN to promote proliferation of neuroblastoma cells. However, the molecular mechanisms of NCYM in the regulation of cell survival have remained poorly characterized. Here we show that NCYM promotes cleavage of MYCN to produce the anti-apoptotic protein, Myc-nick, both in vitro and in vivo. NCYM and Myc-nick were induced at G2/M phase, and NCYM knockdown induced apoptotic cell death accompanied by Myc-nick downregulation. These results reveal a novel function of NCYM as a regulator of Myc-nick production in human neuroblastomas. - Highlights: • NCYM promotes cleavages of MYC and MYCN to produce Myc-nick in vitro. • NCYM increases Myc-nick production in MYCN-amplified neuroblastoma cells. • NCYM knockdown decreases Myc-nick production and induces apoptosis at G2/M phase.

• OSTI ID: 22462069
• Journal Information: Biochemical and Biophysical Research Communications, Vol. 461, Issue 3; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0006-291X
• Country of Publication: United States
• Language: English

Related Subjects

60 APPLIED LIFE SCIENCES
APOPTOSIS
CELL CYCLE
CELL PROLIFERATION
CLEAVAGE
GENES
HUMAN POPULATIONS
IN VITRO
IN VIVO
PROTEINS