Receptor mediated antiproliferative effects of the cytotoxic LHRH agonist AN-152 in human ovarian and endometrial cancer cell lines.

  • Authors:
    • S Westphalen
    • G Kotulla
    • F Kaiser
    • W Krauss
    • G Werning
    • H P Elsasser
    • A Nagy
    • K D Schulz
    • C Grundker
    • A V Schally
    • G Emons
  • View Affiliations

  • Published online on: November 1, 2000     https://doi.org/10.3892/ijo.17.5.1063
  • Pages: 1063-1072
Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

Eighty percent of human ovarian and endometrial cancers express receptors for luteinizing hormone-releasing hormone (LHRH). These receptors might be used for targeted chemotherapy with cytotoxic LHRH analogs such as AN-152, in which doxorubicin is linked to agonist carrier [D-Lys6]LHRH. The antiproliferative effects of doxorubicin and AN-152 were assessed in LHRH receptor-positive ovarian (EFO-21, EFO-27) and endometrial (HEC-1A, Ishikawa) cancer cell lines as well as in LHRH receptor negative ovarian SKOV-3 and endometrial MFE-296 lines. The mechanism of action of AN-152 was investigated by a blockage of receptors using an excess of the LHRH agonist [D-Trp6]LHRH. In some cases, confocal laser-scanning microscopy was used to visualize the accumulation of AN-152 or doxorubicin within the cells. In 3 of 4 LHRH receptor-positive cell lines (EFO-21, HEC-1A, Ishikawa) AN-152 was more effective than doxorubicin in inhibiting cell proliferation. The effect of AN-152 was shown to be receptor-mediated because it could be reduced by competitive blockade of the LHRH receptors with [D-Trp6]LHRH. In contrast, AN-152 was less active than doxorubicin in LHRH receptor-negative lines. Confocal laser-scanning microscopy showed an intranuclear accumulation of AN-152 and competitive inhibition thereof by [D-Trp6]LHRH in LHRH receptor-positive cell lines, but no intracellular accumulation of AN-152 could be detected in the receptor-negative SKOV-3 line. These results suggest a selective receptor-mediated action of AN-152 in receptor-positive cell lines.

Related Articles

Journal Cover

Nov 2000
Volume 17 Issue 5

Print ISSN: 1019-6439
Online ISSN:1791-2423

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Westphalen S, Kotulla G, Kaiser F, Krauss W, Werning G, Elsasser H, Nagy A, Schulz K, Grundker C, Schally A, Schally A, et al: Receptor mediated antiproliferative effects of the cytotoxic LHRH agonist AN-152 in human ovarian and endometrial cancer cell lines.. Int J Oncol 17: 1063-1072, 2000.
APA
Westphalen, S., Kotulla, G., Kaiser, F., Krauss, W., Werning, G., Elsasser, H. ... Emons, G. (2000). Receptor mediated antiproliferative effects of the cytotoxic LHRH agonist AN-152 in human ovarian and endometrial cancer cell lines.. International Journal of Oncology, 17, 1063-1072. https://doi.org/10.3892/ijo.17.5.1063
MLA
Westphalen, S., Kotulla, G., Kaiser, F., Krauss, W., Werning, G., Elsasser, H., Nagy, A., Schulz, K., Grundker, C., Schally, A., Emons, G."Receptor mediated antiproliferative effects of the cytotoxic LHRH agonist AN-152 in human ovarian and endometrial cancer cell lines.". International Journal of Oncology 17.5 (2000): 1063-1072.
Chicago
Westphalen, S., Kotulla, G., Kaiser, F., Krauss, W., Werning, G., Elsasser, H., Nagy, A., Schulz, K., Grundker, C., Schally, A., Emons, G."Receptor mediated antiproliferative effects of the cytotoxic LHRH agonist AN-152 in human ovarian and endometrial cancer cell lines.". International Journal of Oncology 17, no. 5 (2000): 1063-1072. https://doi.org/10.3892/ijo.17.5.1063