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. 1998 Nov;89(11):1113–1117. doi: 10.1111/j.1349-7006.1998.tb00505.x

Modulation of Dihydroxy‐di‐n‐propylnitrosamine‐induced Liver Lesion Development in Opisthorchis‐infected Syrian Hamsters by Praziquantel Treatment in Association with Butylated Hydroxyanisole or Dehydroepiandrosterone Administration

Malcolm A Moore 1,✉, Witaya Thamavit 2, Danai Tiwawech 3, Nobuyuki Ito 4, Hiroyuki Tsuda 1
PMCID: PMC5921716  PMID: 9914779

Abstract

The effects of praziquantel coupled with dehydroepiandrosterone (DHEA) or butylated hydroxyanisole (BHA) administration 16 weeks subsequent to dihydroxy‐di‐n‐propylnitrosamine (DHPN) treatment and infection with Opisthorchis viverrini (OV) on lesion development in the liver of Syrian hamsters were investigated. Animals were given 80 OV metacercariae and then two i.p. injections of DHPN (500 mg/kg body weight) 4 and 5 weeks thereafter. At week 16, groups received praziquantel (250 mg/kg, i.g.) and were placed on normal diet or diet supplemented with BHA (1%) or DHEA (0.6%) until they were killed at week 24. Histopathological assessment revealed that, whereas antihelminthic treatment alone resulted in a clear reduction in hepatocellular lesion development, effects on cholangiocellular lesions were equivocal. BHA and DHEA, in contrast, were both associated with a significant reduction in frequency of cholangiofibrosis and cholangiocellular carcinoma. The former chemical, however, increased the numbers of liver nodules while the hormone brought about a decrease as well as a shift in the phenotype of the lesions. The results thus indicate that although cholangiocellular lesion development may, unlike generation of hepatocellular nodules, be to a certain extent independent of the continued presence of parasite, it can be influenced by exogenous treatments.

Keywords: Opisthorchis viverrini, Liver cancer, Prevention, Butylated hydroxyanisole, Dehydroepiandrosterone

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