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Peptidyl membrane-interactive molecules are cytotoxic to prostatic cancer cells in vitro.

Publication ,  Journal Article
Robertson, CN; Roberson, KM; Pinero, A; Jaynes, JM; Paulson, DF
Published in: World J Urol
1998

Cytotoxic membrane disruption via lytic peptides is a well-recognized mechanism of immune surveillance for antifungal and antibacterial host protection. Naturally occurring lytic peptides were shown to exhibit antitumor activity as well. Peptidyl membrane-interactive molecules (MIMs) are synthetic lytic peptides specifically designed to maximize antitumor activity. We tested nine novel Peptidyl MIMs for activity against four androgen-insensitive prostate-cancer cell lines using a standard microculture tetrazolium (MTT) assay. Five Peptidyl MIMs known to form alpha-helical secondary structures were active against prostate carcinoma and were chosen for further study. Three peptides configured in beta-pleated sheets were noticeably less effective. Concentrations lethal to 50% of the prostate-cancer cell lines treated (D50 values) with the five chosen Peptidyl MIMs ranged from 0.6 to 1.8 microM. For comparison, two alpha-helically structured peptides, D2A21 and DP1E, were tested on several other cancer types: breast (n = 2), colon (n = 2). bladder, cervical and lung carcinomas (n = 1 each). Resulting LD50 values obtained in breast carcinoma cells were significantly higher (P < 0.05) than those observed in prostate cancer cells. LD50 values recorded for D2A21 and DP1E in cervical, colon, bladder, and lung cancer lines were similar to those obtained in prostate cancer cells. As compared with cisplatin, a standard chemotherapeutic drug, the LD50 values recorded for D2A21 were significantly lower (P < 0.04) in prostate-cancer cell lines, suggesting the therapeutic efficacy of Peptidyl MIMs. These data demonstrate for the first time the cytotoxic potential of Peptidyl MIMs against prostate cancer cells and suggest a dependence on a specific secondary alpha-helical structure of the peptide.

Duke Scholars

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Published In

World J Urol

DOI

ISSN

0724-4983

Publication Date

1998

Volume

16

Issue

6

Start / End Page

405 / 409

Location

Germany

Related Subject Headings

  • Uterine Cervical Neoplasms
  • Urology & Nephrology
  • Urinary Bladder Neoplasms
  • Tumor Cells, Cultured
  • Prostatic Neoplasms
  • Peptides
  • Membrane Proteins
  • Male
  • Lung Neoplasms
  • Lethal Dose 50
 

Citation

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Robertson, C. N., Roberson, K. M., Pinero, A., Jaynes, J. M., & Paulson, D. F. (1998). Peptidyl membrane-interactive molecules are cytotoxic to prostatic cancer cells in vitro. World J Urol, 16(6), 405–409. https://doi.org/10.1007/s003450050091
Robertson, C. N., K. M. Roberson, A. Pinero, J. M. Jaynes, and D. F. Paulson. “Peptidyl membrane-interactive molecules are cytotoxic to prostatic cancer cells in vitro.World J Urol 16, no. 6 (1998): 405–9. https://doi.org/10.1007/s003450050091.
Robertson CN, Roberson KM, Pinero A, Jaynes JM, Paulson DF. Peptidyl membrane-interactive molecules are cytotoxic to prostatic cancer cells in vitro. World J Urol. 1998;16(6):405–9.
Robertson, C. N., et al. “Peptidyl membrane-interactive molecules are cytotoxic to prostatic cancer cells in vitro.World J Urol, vol. 16, no. 6, 1998, pp. 405–09. Pubmed, doi:10.1007/s003450050091.
Robertson CN, Roberson KM, Pinero A, Jaynes JM, Paulson DF. Peptidyl membrane-interactive molecules are cytotoxic to prostatic cancer cells in vitro. World J Urol. 1998;16(6):405–409.
Journal cover image

Published In

World J Urol

DOI

ISSN

0724-4983

Publication Date

1998

Volume

16

Issue

6

Start / End Page

405 / 409

Location

Germany

Related Subject Headings

  • Uterine Cervical Neoplasms
  • Urology & Nephrology
  • Urinary Bladder Neoplasms
  • Tumor Cells, Cultured
  • Prostatic Neoplasms
  • Peptides
  • Membrane Proteins
  • Male
  • Lung Neoplasms
  • Lethal Dose 50