Abstract:
:We evaluated whether treatment of orthotopic human prostate cancer in nude mice with pegylated IFN-alpha-2b (PEG-IFN-alpha-2b) and docetaxel could represent a two-compartment targeting of primary tumor (tumor cells and tumor-associated endothelial cells) and inhibition of regional lymph node metastasis. The antiangiogenic properties of IFN were combined with the cytotoxic properties of docetaxel, resulting in apoptosis of both tumor cells and endothelium and hence significant inhibition of primary tumor growth. We first determined the optimal biological dose of PEG-IFN-alpha-2b (70,000 IU/week) necessary to down-regulate the expression of basic fibroblast growth factor, matrix metalloprotease-9, and matrix metalloprotease-2. The therapeutic dose of docetaxel (10 mg/kg/week) was determined by efficacy and minimal body weight loss. Therapy beginning 3 days after orthotopic implantation of PC3-MM2 prostate cancer cells reduced tumor weight by 37% in mice treated with PEG-IFN-alpha-2b, by 60% in mice treated with docetaxel, and by 83% in those given both drugs. PEG-IFN-alpha-2b also induced apoptosis of tumor-associated endothelial cells and hence a significant decrease in microvessel density. Our data indicate that the combination of PEG-IFN-alpha and docetaxel inhibits neoplastic angiogenesis by inducing a decrease in the local production of proangiogenic molecules by tumor cells, resulting in increased apoptosis of tumor-associated endothelial cells.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Huang SF,Kim SJ,Lee AT,Karashima T,Bucana C,Kedar D,Sweeney P,Mian B,Fan D,Shepherd D,Fidler IJ,Dinney CP,Killion JJsubject
Has Abstractpub_date
2002-10-15 00:00:00pages
5720-6issue
20eissn
0008-5472issn
1538-7445journal_volume
62pub_type
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