期刊
ANTI-CANCER DRUGS
卷 30, 期 1, 页码 65-71出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/CAD.0000000000000694
关键词
kinase inhibitor; PRKCI; prostate cancer; protein kinase C-iota
资金
- Leo and Anne Albert Charitable Trust
- Sapphire Foundation for Prostate Cancer
- Frederick H. Leonhardt Foundation
- William and Ella Owens Medical Research Foundation
- Translational Research Core Facility at the H. Lee Moffitt Cancer Center& Research Institute, an NCI designated Comprehensive Cancer Center [P30-CA076292]
- Daniel Tanner Foundation
Protein kinase C-iota (PKC-iota) is an oncogene overexpressed in many cancer cells including prostate, breast, ovarian, melanoma, and glioma. Previous in-vitro studies have shown that 5-amino-1-((1R,2S,3S,4R)-2,3-dihydroxy-4-methylcyclopentyl)-1H-imidazole-4-carboxamide (ICA-1s), a PKC-iota specific inhibitor, is effective against some cancer cell lines by decreasing cell growth and inducing apoptosis. To assess ICA-1s as a possible therapeutic, in-vivo studies using a murine model were performed. ICA-1s was tested for stability in blood serum and results demonstrated that ICA-1s was stable in human plasma at 25 and 37 degrees C over a course of 2 h. Toxicity of ICA-1s was tested for both acute and subacute exposure. The acute exposure showed patient surviving after 48 h of doses ranging from 5 to 5000 mg/kg. Subacute tests exposed the patients to 14 days of treatment and were followed by serum and tissue collection. Aspartate aminotransferase, alkaline phosphatase, gamma-glutamyl transpeptidase, troponin, and C-reactive protein serum levels were measured to assess organ function. ICA-1s in plasma serum was measured over the course of 24 h for both oral and intravenous treatments. Heart, liver, kidney, and brain tissues were analyzed for accumulation of ICA-1s. Finally, athymic nude mice were xenografted with DU-145 prostate cancer cells. After tumors reached similar to 0.2 cm(2), they were either treated with ICA-1s or left as control and measured for 30 days or until the tumor reached 2 cm(2). Results showed tumors in treated mice grew at almost half the rate as untreated tumors, showing a significant reduction in growth. In conclusion, ICA-1s is stable, shows low toxicity, and is a potential therapeutic for prostate carcinoma tumors.
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