Current Cancer Drug Targets

Ruiwen Zhang 
Texas Tech University Health Sciences Center
1300 Coulter Drive
Amarillo, TX 79106
USA

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CD44-Targeting for Antitumor Drug Delivery: A New SN-38-Hyaluronan Bioconjugate for Locoregional Treatment of Peritoneal Carcinomatosis

Author(s): A. Serafino, M. Zonfrillo, F. Andreola, R. Psaila, L. Mercuri, N. Moroni, D. Renier, M. Campisi, C. Secchieri, P. Pierimarchi.

Abstract:

An innovative approach for cancer therapy implies the use of drugs covalently conjugated to macromolecular carriers that specifically target molecules over-expressed on tumor cells. This drug delivery strategy may allow a controlled release of the drug and a high targeting selectivity on tumor cells, increasing drug cytotoxicity and decreasing its undesirable side effects. We provide in vitro and in vivo preclinical data on the antitumor efficacy of ONCOFID™-S, a new bioconjugate of hyaluronic acid (HA) with SN-38 (the CPT11 active metabolite), that support the validity of the drug delivery strategy implying the use of HA as macromolecular carrier of antineoplastic drugs, an approach based on the over-expression of its target CD44 (the receptor for HA-mediated motility) in a wide variety of cancers. We show that ONCOFID™-S exerts a strong in vitro anti-proliferative activity on CD44 over-expressing rat DHD/K12/trb colon adenocarcinoma cells, as well as on gastric, breast, oesophageal, ovarian and lung human cancer cells, higher than that exerted by unconjugated SN-38. We also demonstrated the in vivo anti-tumor efficacy of locoregional treatment with ONCOFID™-S on two pre-clinical models of colorectal cancer (CRC) in BDIX rats: a) syngeneic model of subcutaneous tumor; b) syngeneic model of metastatic tumor induced by injection of cells into the peritoneal cavity, mimicking the clinical situation of peritoneal carcinomatosis. Specifically, in the latter model ONCOFID™-S is able to dramatically reduce all parameters indicative of a poor prognosis in peritoneal metastatization of CRC without any myelotoxicity or mesothelial inflammation. We propose this CD44-targeted therapeutic strategy for locoregional treatment of peritoneal carcinomatosis from CRC, against which systemic chemotherapy results almost inefficient.

Keywords: CD44, colorectal cancer, drug delivery, hyaluronic acid, locoregional treatment, peritoneal carcinomatosis, target therapy, confocal laser scanning microscopy, camptothecin, 7-ethyl-10-hydroxy-camptothecin, 7-ethyl-10-[4-(l-piperidino)-lpiperidino] carbonyloxy-camptothecin or Irinotecan

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Article Details

VOLUME: 11
ISSUE: 5
Year: 2011
Page: [572 - 585]
Pages: 14
DOI: 10.2174/156800911795655976
Price: $58