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Changes in hepatic metabolic enzyme activities and biliary excretion of 4-nitrophenol in streptozotocin induced diabetic rats

Almási, Attila; Pinto, Évora Da Ibéria Leite Nogueira; Kovács, Noémi-Piroska; Fischer, Tamás; Markovics, Zoltán; Fischer, Emil; Perjési, Pál

Brazilian Journal of Pharmaceutical Sciences; Vol. 54 No. 1 (2018); e17347

Universidade de São Paulo. Faculdade de Ciências Farmacêuticas 2018-06-07

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  • Título:
    Changes in hepatic metabolic enzyme activities and biliary excretion of 4-nitrophenol in streptozotocin induced diabetic rats
  • Autor: Almási, Attila; Pinto, Évora Da Ibéria Leite Nogueira; Kovács, Noémi-Piroska; Fischer, Tamás; Markovics, Zoltán; Fischer, Emil; Perjési, Pál
  • Assuntos: 4-Nitrophenol; Hepatic Excretion; Glucuronide Conjugate; Sulfate Conjugate; Experimental Diabetes
  • É parte de: Brazilian Journal of Pharmaceutical Sciences; Vol. 54 No. 1 (2018); e17347
  • Descrição: Activity of hepatic metabolic enzymes of glucuronidation and sulfation of 4-nitrophenol (PNP) and biliary excretion of its glucuronide (PNP-G) and sulfate (PNP-S) conjugates have been investigated in control and streptozotocin (STZ)-induced diabetic rats. 500 μM PNP solution was luminally perfused in a cannulated jejunal loop for 90 minutes. It was found that biliary excretion of PNP-G was significantly decreased in the diabetic rats. This effect of STZ could be completely reversed by administration of rapid-acting insulin. Activity of hepatic UDP-glucuronyltransferase and β-glucuronidase was also depressed by the STZ pretreatment. Administration of insulin antagonized the inhibitory action of STZ on UDP-glucuronyltransferase, but the reduced activity of β-glucuronidase was not reversed. Biliary excretion of PNP-S was also depressed in the diabetic rats. Whereas, different effects of insulin administration were observed. Namely, the lower biliary excretion rate of PNP-S was not changed after administration of insulin. Activity of the sulfotransferase and the arylsulfatase enzymes was not altered either by STZ pretreatment or by insulin administration. Biliary excretion of PNP was also significantly depressed by STZ and this depression was not changed after insulin administration. The results call attention to hepatobiliary circulation of low molecular weight xenobiotics and their glucuronide and sulfate conjugates.
  • Títulos relacionados: https://www.revistas.usp.br/bjps/article/view/146831/140360
  • Editor: Universidade de São Paulo. Faculdade de Ciências Farmacêuticas
  • Data de criação/publicação: 2018-06-07
  • Formato: Adobe PDF
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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