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In vivo inhibition by a site-specific catalytic RNA subunit of RNase P designed against the BCR-ABL oncogenic products: a novel approach for cancer treatment.

Abstract：

:One major obstacle to the effective treatment of cancer is to distinguish between tumor cells and normal cells. The chimeric molecules created by cancer-associated chromosomal abnormalities are ideal therapeutic targets because they are unique to the disease. We describe the use of a novel approach based on the catalytic RNA subunit of RNase P to destroy specifically the tumor-specific fusion genes created as a result of chromosome abnormalities. Using as a target model the abnormal BCR-ABL p190 and p210 products, we constructed M1-RNA with guide sequences that recognized the oncogenic messengers at the fusion point (M1-p190-GS and M1-p210-GS). To test the effectiveness and the specificity of M1-p190-GS and M1-p210-GS, we studied in vitro and in vivo effects of these RNA enzymes against BCR-ABL(p190) and BCR-ABL(p210), bearing in mind that both fusion genes share the ABL sequence but differ in the sequence coming from the BCR gene. We showed that M1-p190-GS and M1-p210-GS can act as sequence-specific endonucleases and can exclusively cleave target RNA that forms a base pair with the guide sequence (GS). We also demonstrated that when M1-p190-GS and M1-p210-GS were expressed in proper mammalian cell models, they abolished the effect of BCR-ABL by specifically decreasing the amount of the target BCR-ABL mRNA and preventing the function of the BCR-ABL oncogenes. These data clearly demonstrate the usefulness of the catalytic activity of M1-GS RNA to cleave specifically the chimeric molecules created by chromosomal abnormalities in human cancer and to represent a novel approach to cancer treatment.

journal_name

Blood

journal_title

Blood

authors

Cobaleda C,Sánchez-García I

subject

Has Abstract

pub_date

2000-02-01 00:00:00

pages

731-7

issue

3

eissn

0006-4971

issn

1528-0020

journal_volume

95

pub_type

杂志文章

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