Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Original Paper
  • Published:

Identification and characterization of nucleophosmin/B23/numatrin which binds the anti-oncogenic transcription factor IRF-1 and manifests oncogenic activity

Abstract

Interferon regulatory factor-1 (IRF-1) acts as a transcriptional activator in the interferon system and as a tumor suppressor. The loss of functional IRF-1 has been observed in a significant number of patients with myelodysplastic syndrome (MDS) and leukemia, suggesting a potentially critical role of IRF-1 in human oncostasis. Here we report an alternative mechanism by which IRF-1 may be inactivated. We purified an IRF-1 association molecule which was revealed to be identical to a nuclear factor nucleophosmin (NPM)/B23/numatrin. Functional analysis showed that NPM inhibited the DNA-binding and transcriptional activity of IRF-1. Moreover, NPM was overexpressed in several clinical leukemia samples and human-derived leukemia cell lines. Finally, overexpression of NPM in NIH3T3 cells resulted in malignant transformation. These results suggest the possible involvement of NPM in inactivating IRF-1-dependent anti-oncogenic surveillance in human cancer development.

This is a preview of subscription content, access via your institution

Access options

Rent or buy this article

Prices vary by article type

from$1.95

to$39.95

Prices may be subject to local taxes which are calculated during checkout

Similar content being viewed by others

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

Kondo, T., Minamino, N., Nagamura-Inoue, T. et al. Identification and characterization of nucleophosmin/B23/numatrin which binds the anti-oncogenic transcription factor IRF-1 and manifests oncogenic activity. Oncogene 15, 1275–1281 (1997). https://doi.org/10.1038/sj.onc.1201286

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1038/sj.onc.1201286

Keywords

This article is cited by

Search

Quick links