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
Oncogenejournal_title
Oncogeneauthors
Li W,Park JW,Nuijens A,Sliwkowski MX,Keller GAsubject
Has Abstractpub_date
1996-06-06 00:00:00pages
2473-7issue
11eissn
0950-9232issn
1476-5594journal_volume
12pub_type
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