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Journal of Virology, August 2004, p. 8687-8700, Vol. 78, No. 16
0022-538X/04/$08.00+0     DOI: 10.1128/JVI.78.16.8687-8700.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Papillomavirus-Mediated Neoplastic Progression Is Associated with Reciprocal Changes in Jagged1 and Manic Fringe Expression Linked to Notch Activation{dagger}

Karthikeyan Veeraraghavalu,1* Mark Pett,2 Rekha V. Kumar,3 Pradip Nair,1 Annapoorni Rangarajan,4 Margaret A. Stanley,2 and Sudhir Krishna1

National Centre for Biological Sciences, TIFR, UAS-GKVK Campus, Bangalore 560065,1 Department of Pathology, Kidwai Memorial Institute of Oncology, Bangalore 560029, India,3 Department of Pathology, University of Cambridge, Cambridge, United Kingdom,2 Whitehead Institute for Biomedical Research, Cambridge Center, Cambridge, Massachusetts 021424

Received 7 November 2003/ Accepted 18 March 2004

Infection by high-risk human papillomaviruses (HPV) and persistent expression of viral oncogenes E6 and E7 are causally linked to the development of cervical cancer. These oncogenes are necessary but insufficient for complete transformation of human epithelial cells in vivo. Intracellular Notch1 protein is detected in invasive cervical carcinomas (ICC), and truncated Notch1 alleles complement the function of E6/E7 in the transformation of human epithelial cells. Here we investigate potential mechanisms of Notch activation in a human cervical neoplasia. We have analyzed human cervical lesions and serial passages of an HPV type 16-positive human cervical low-grade lesion-derived cell line, W12, that shows abnormalities resembling those seen in cervical neoplastic progression in vivo. Late-passage, but not early-passage, W12 and progression of the majority of human high-grade cervical lesions to ICC showed upregulation of Notch ligand and Jagged1 and downregulation of Manic Fringe, a negative regulator of Jagged1-Notch1 signaling. Concomitantly, an increase in Notch/CSL (CBF1, Suppressor of Hairless, Lag1)-driven reporter activity and a decrease in Manic Fringe upstream regulatory region (MFng-URR)-driven reporter activity was observed in late-passage versus early passage W12. Analysis of the MFng-URR revealed that Notch signaling represses this gene through Hairy Enhancer of Split 1, a transcriptional target of the Notch pathway. Expression of Manic Fringe by a recombinant adenovirus, dominant-negative Jagged1, or small interfering RNA against Jagged1 inhibits the tumorigenicity of CaSki, an ICC-derived cell line that was previously shown to be susceptible to growth inhibition induced by antisense Notch1. We suggest that activation of Notch in cervical neoplasia is Jagged1 dependent and that its susceptibility to the influence of Manic Fringe is of therapeutic value.

* Corresponding author. Mailing address: National Centre for Biological Sciences, TIFR, UAS-GKVK Campus, Bangalore 560065, India. Phone: 91 80 23636421. Fax: 91 80 23636662. E-mail: vkarthik{at}ncbs.res.in.

{dagger} Supplemental material for this article may be found at http://jvi.asm.org/.

Journal of Virology, August 2004, p. 8687-8700, Vol. 78, No. 16
0022-538X/04/$08.00+0     DOI: 10.1128/JVI.78.16.8687-8700.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Lace, M. J., Anson, J. R., Klingelhutz, A. J., Lee, J. H., Bossler, A. D., Haugen, T. H., Turek, L. P. (2009). Human Papillomavirus (HPV) Type 18 Induces Extended Growth in Primary Human Cervical, Tonsillar, or Foreskin Keratinocytes More Effectively than Other High-Risk Mucosal HPVs. J. Virol. 83: 11784-11794 [Abstract] [Full Text]  
  • Yugawa, T., Handa, K., Narisawa-Saito, M., Ohno, S.-i., Fujita, M., Kiyono, T. (2007). Regulation of Notch1 Gene Expression by p53 in Epithelial Cells. Mol. Cell. Biol. 27: 3732-3742 [Abstract] [Full Text]  
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