Prevention of N-methyl-N-nitrosourea-induced breast cancer by α-fetoprotein (AFP)-derived peptide, a peptide derived from the active site of AFP

Rahul R. Parikh, Neil Gildener-Leapman, Amithi Narendran, Hung Yun Lin, Nicole Lemanski, James A. Bennett, Herbert I. Jacobson, Thomas T. Andersen

研究成果: 雜誌貢獻文章

29 引文 斯高帕斯(Scopus)

摘要

Purpose: α-Fetoprotein (AFP) is a protein of pregnancy associated with a decrease in lifetime risk of breast cancer in parous women. A synthetic, cyclic nonapeptide has been developed that mimics the antioncogenic active site of AFP. To test the hypothesis that the AFP-derived peptide (AFPep) can prevent breast cancer, the N-methyl-N-nitrosourea-induced breast cancer model was used in rats. Experimental Design: AFPep was given daily by injection beginning 10 days after N-methyl-N-nitrosourea treatment and continued for 23 days (a time designed to mimic pregnancy) or for other times to assess efficacy as a function of drug duration. Tumor incidence, multiplicity, and latency were noted as end points. At necropsy, pathology analysis of tumors and major organs were obtained. Results: AFPep prevented cancer in a dose-dependent fashion. Significantly longer mean tumor-free days (P <0.02), lower tumor incidence (P = 0.004), and lower tumor multiplicity were observed for AFPep-treated groups. No evidence of host toxicity as measured by body weight, cage activity, fur texture, and organ weights (liver, uterus, heart, kidney, and spleen) were found in animals treated with AFPep. Mechanistic studies using transplantable human breast cancer xenografts showed that the peptide interfered with estrogen-dependent breast cancer growth inhibited the phosphorylation of the estrogen receptor and activated phosphorylation of p53. Conclusions: AFPep is a well-tolerated, mechanistically novel, chemopreventive agent in models of breast cancer and warrants further development for the prevention and treatment of this disease in humans.
原文英語
頁(從 - 到)8512-8520
頁數9
期刊Clinical Cancer Research
11
發行號23
DOIs
出版狀態已發佈 - 十二月 1 2005
對外發佈Yes

ASJC Scopus subject areas

  • Cancer Research
  • Oncology

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