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  • Title: beta-Cyclodextrin: promoting effect on the development of renal tubular cell tumors in rats treated with N-ethyl-N-hydroxyethylnitrosamine.
    Author: Hiasa Y, Ohshima M, Kitahori Y, Konishi N, Fujita T, Yuasa T.
    Journal: J Natl Cancer Inst; 1982 Oct; 69(4):963-7. PubMed ID: 6956770.
    Abstract:
    Injection (sc) of beta-cyclodextrin (beta-C) increased the number and size of renal tubular cell tumors in inbred Wistar (W) rats treated with 1,000 ppm of N-ethyl-N-hydroxyethylnitrosamine (EHEN). The incidence of renal tumors at the end of the 32-week experiment was 50% in rats treated with 1,000 ppm EHEN for 2 weeks and 100% in rats treated with 1,000 ppm EHEN for 2 weeks and then given daily sc injections of beta-C for 1 week. The incidence of renal tumors more than 3 mm in diameter was 70% in rats treated with 1,000 ppm EHEN before beta-C but 0% in rats treated with EHEN alone. In addition, beta-C promoted the development of renal tumors in rats treated with 500 ppm EHEN, which is a subthreshold dose for renal tubular cell tumorigenesis. These results show that beta-C promotes EHEN-induced renal tubular cell tumorigenesis.
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