Multifunctional tumor-targeted polymer-peptide-drug delivery system for treatment of primary and metastatic cancers

Pooja Chandna, Jayant J. Khandare, Elizabeth Ber, Lorna Rodriguez-Rodriguez, Tamara Minko

Research output: Contribution to journalArticlepeer-review

45 Scopus citations


Purpose: In order to improve drug delivery to drug-resistant ovarian tumors, we constructed a multifunctional polymer-peptide-drug conjugate (PPDC) system for effective treatment of primary and metastatic ovarian cancers. Methods: The PPDC consists of the poly(Ethylene Glycol) (PEG) polymeric carrier conjugated via citric acid spacers to anticancer drug (Camptothecin, CPT), tumor targeting moiety (LRHR, a synthetic analog of luteinizing hormone-releasing hormone) and a suppressor of cellular antiapoptotic defense (BH3 peptide). To test the conjugates in vitro and in vivo, cancer cells were isolated from tissue samples obtained from patients with ovarian primary tumor and metastatic malignant ascites. Results: It was found that cells isolated from malignant ascites were more aggressive in terms of tumor growth and more resistant to chemotherapy when compared with those isolated from primary tumors. PPDC containing two copies of drugs and peptides was most efficient in treatment of primary tumors and intraperitoneal metastases. Multiple treatments with this PPDC led to almost complete regression of primary tumor and prevented growth of malignant ascites. Conclusion: The proposed multifunctional polymeric delivery system which consists of multiple copies of the drug and peptides demonstrated significantly higher antitumor activity in primary and metastatic cancers when compared with drug alone and PEG-CPT conjugate.

Original languageEnglish (US)
Pages (from-to)2296-2306
Number of pages11
JournalPharmaceutical research
Issue number11
StatePublished - Nov 2010

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Molecular Medicine
  • Pharmacology
  • Pharmaceutical Science
  • Organic Chemistry
  • Pharmacology (medical)


  • BH3 peptide
  • LHRH peptide
  • PEG polymer
  • camptothecin
  • proapoptotic peptide


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