Heregulin is rapidly translocated to the nucleus and its transport is correlated with c-myc induction in breast cancer cells.

Abstract:

:Heregulins (neuregulins) are a family of proteins known to interact and activate the receptor tyrosine kinases ErbB2 in association with ErbB3 or ErbB4. Using immunofluorescence microscopy, electron microscopy autoradiography, and SDS-PAGE analysis of nuclear fractions, we show that the heregulin-beta1(1-244) isoform is rapidly internalized and translocated to the nucleus of SK-BR-3 breast cancer cells as an intact molecule. Heregulin-beta 1(1-244) treatment up-regulated expression of c-myc mRNA and protein, which was also observed to undergo its own translocation from the cytosol to the nucleus. c-myc thus appears to be a cellular target gene of HRGbeta 1(1-244), and its induction may be related to the nuclear translocation of heregulin.

journal_name

Oncogene

journal_title

Oncogene

authors

Li W,Park JW,Nuijens A,Sliwkowski MX,Keller GA

subject

Has Abstract

pub_date

1996-06-06 00:00:00

pages

2473-7

issue

11

eissn

0950-9232

issn

1476-5594

journal_volume

12

pub_type

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