ErbB-4 ribozymes abolish neuregulin-induced mitogenesis

Careen K. Tang, David J. Goldstein, Jennifer Payne, Frank Czubayko, Maurizio Alimandi, Ling Mei Wang, Jacalyn H. Pierce, Marc E Lippman

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The epidermal growth factor-like receptor tyrosine kinase (ErbB) family is frequently overexpressed in a variety of human carcinomas, including breast cancer. To assist in characterizing the role of ErbB-4 in breast cancer, we generated three specific hammerhead ribozymes targeted to the ErbB-4 mRNA. These ribozymes, Rz6, Rz21, and Rz29, efficiently catalyzed the specific cleavage of ErbB-4 message in a cell-free system. We demonstrated that the neuregulin-induced mitogenic effect was abolished in ribozyme Rz29- and Rz6-transfected 32D/ErbB-4 cells. Inhibition of mitogenesis was characterized by ribozyme-mediated down-regulation of ErbB-4 expression. In addition, we provide the first evidence that different threshold levels of ErbB-4 expression and activation correlate with different responses to neuregulin stimulation. High levels of ErbB-4 expression, phosphorylation, and homodimerization are necessary for neuregulin-stimulated, interleukin 3- independent cell proliferation in the 32D/E4 cells. In the case of Rz29- transfected 32D/E4 cells, low levels of ErbB-4 expression allowed neuregulin- induced phosphorylation but were insufficient to couple the activated receptor to cellular signaling. Furthermore, expression of the functional ErbB-4 ribozyme in T47I) human breast carcinoma cells led to a down- regulation of endogenous ErbB-4 expression and a reduction of anchorage- independent colony formation. These studies support the use of ErbB-4 ribozymes to define the role of ErbB-4 receptors in human cancers.

Original languageEnglish
Pages (from-to)3415-3422
Number of pages8
JournalCancer Research
Volume58
Issue number15
StatePublished - Aug 1 1998
Externally publishedYes

Fingerprint

Neuregulins
Catalytic RNA
Breast Neoplasms
Down-Regulation
Phosphorylation
Cell-Free System
Interleukin-3
Epidermal Growth Factor Receptor
Protein-Tyrosine Kinases
Cell Proliferation
Carcinoma
Messenger RNA
Neoplasms

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

Cite this

Tang, C. K., Goldstein, D. J., Payne, J., Czubayko, F., Alimandi, M., Wang, L. M., ... Lippman, M. E. (1998). ErbB-4 ribozymes abolish neuregulin-induced mitogenesis. Cancer Research, 58(15), 3415-3422.

ErbB-4 ribozymes abolish neuregulin-induced mitogenesis. / Tang, Careen K.; Goldstein, David J.; Payne, Jennifer; Czubayko, Frank; Alimandi, Maurizio; Wang, Ling Mei; Pierce, Jacalyn H.; Lippman, Marc E.

In: Cancer Research, Vol. 58, No. 15, 01.08.1998, p. 3415-3422.

Research output: Contribution to journalArticle

Tang, CK, Goldstein, DJ, Payne, J, Czubayko, F, Alimandi, M, Wang, LM, Pierce, JH & Lippman, ME 1998, 'ErbB-4 ribozymes abolish neuregulin-induced mitogenesis', Cancer Research, vol. 58, no. 15, pp. 3415-3422.
Tang CK, Goldstein DJ, Payne J, Czubayko F, Alimandi M, Wang LM et al. ErbB-4 ribozymes abolish neuregulin-induced mitogenesis. Cancer Research. 1998 Aug 1;58(15):3415-3422.
Tang, Careen K. ; Goldstein, David J. ; Payne, Jennifer ; Czubayko, Frank ; Alimandi, Maurizio ; Wang, Ling Mei ; Pierce, Jacalyn H. ; Lippman, Marc E. / ErbB-4 ribozymes abolish neuregulin-induced mitogenesis. In: Cancer Research. 1998 ; Vol. 58, No. 15. pp. 3415-3422.
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