Abstract

AbstractEstrogen receptor (ER)-[alpha]46 is known as an important isoform for ER[alpha]. It inhibits the function of full length ER[alpha] in MCF-7 mammary carcinoma cells and associated with cell cycle arrest. On the other hand, the oncogene HMGA1 (formally HMG I/Y) is known to have increased expression in mammary carcinoma correlating with the degree of malignancy. We present here that HMGA1a (HMG I) induces the exon skipped product, ER[alpha]46 mRNA, by tethering U1 snRNP to an upstream pseudo 5' splice site, which is quite analogous to the PSI-mediated splicing regulation of Drosophila P-element.

Highlights

  • Division of Gene Expression Mechanism, ICMS, *Dept. of Breast Surgery, Fujita Health University, Toyoake, Aichi 470-1192, Japan.

  • Kenji Ohe, *Toshiaki Utsumi & Akila Mayeda

  • Division of Gene Expression Mechanism, ICMS, *Dept.

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Summary

Introduction

Division of Gene Expression Mechanism, ICMS, *Dept. of Breast Surgery, Fujita Health University, Toyoake, Aichi 470-1192, Japan.

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