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Antisense MBD2 gene therapy inhibits tumorigenesis

✍ Scribed by Andrew Slack; Veronica Bovenzi; Pascal Bigey; M. A. Ivanov; Shyam Ramchandani; Sanjoy Bhattacharya; Benjamin tenOever; B. Lamrihi; Daniel Scherman; Moshe Szyf

Publisher
John Wiley and Sons
Year
2002
Tongue
English
Weight
396 KB
Volume
4
Category
Article
ISSN
1099-498X

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✦ Synopsis

Abstract

Background

Aberration in the pattern of DNA methylation is one of the hallmarks of cancer. We present data suggesting that dysregulation of MBD2, a recently characterized member of a novel family of methylated DNA binding proteins, is involved in tumorigenesis. Two functions were ascribed to MBD2, DNA demethylase activity and repression of methylated genes.

Methods

Multiple antisense expression and delivery systems, transfection, electrotransfer and adenoviral were employed to demonstrate that MBD2 is essential in tumorigenesis, both ex vivo and in vivo.

Results

Inhibition of MBD2 by antisense expression resulted in inhibition of anchorage‐independent growth of antisense transfected cancer cells or cells infected with an adenoviral vector expressing MBD2 antisense. Xenograft tumors treated with an adenoviral vector expressing MBD2 antisense or xenografts treated with electrotransferred plasmids expressing MBD2 antisense showed reduced growth.

Conclusions

These results support the hypothesis that one or both of the functions described for MBD2 are critical in tumorigenesis and that MBD2 is a potential anticancer target. Copyright © 2002 John Wiley & Sons, Ltd.

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