The effect of antibodies and immunotoxins reactive with HER-2/neu on growth of ovarian and breast cancer cell lines.


Journal Article

Because HER-2/neu is overexpressed in one third of breast and ovarian cancers, we examined the effect of unconjugated monoclonal antibodies (ID-5, PB-3, TA-1) and an immunotoxin (TA-1-ricin) reactive with this protooncogene on the growth of breast and ovarian cancer cell lines.The tritiated thymidine incorporation assay was used to examine the effect of unconjugated antibodies on proliferation. A limiting dilution clonogenic assay was used to assess the effect of immunotoxin on cellular cytotoxicity.Scatchard analysis revealed that OVCA 420, OVCA 429, OVCA 432, and OVCA 433 cells had approximately 10(4) HER-2/neu receptors per cell, whereas the SKOv3 and SKBr3 cell lines expressed 10(5) and 10(6) receptors per cell, respectively. Monoclonal antibody ID-5 caused significant inhibition of tritiated thymidine incorporation in SKBr3, SKOv3, and OVCA 420 cells (p < 0.002). The TA-1-rich immunotoxin significantly inhibited the clonogenic growth of only SKBr3 and SKOv3 cells.HER-2/neu may be a useful target for immunotherapy with unconjugated antibodies and immunotoxins in ovarian and breast cancers that overexpress this protooncogene.

Full Text

Duke Authors

Cited Authors

  • Rodríguez, GC; Boente, MP; Berchuck, A; Whitaker, RS; O'Briant, KC; Xu, F; Bast, RC

Published Date

  • January 1, 1993

Published In

Volume / Issue

  • 168 / 1 Pt 1

Start / End Page

  • 228 - 232

PubMed ID

  • 8420332

Pubmed Central ID

  • 8420332

Electronic International Standard Serial Number (EISSN)

  • 1097-6868

International Standard Serial Number (ISSN)

  • 0002-9378

Digital Object Identifier (DOI)

  • 10.1016/s0002-9378(12)90918-7


  • eng