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Developmental aspects of polyamine-oxidizing enzyme activities in the mouse kidney. Effects of testosterone

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Summary

In the present study developmental patterns of renal polyamineoxidizing enzymes polyamine oxidase (PAO) and diamine oxidase (DAO) in male and female ICR mice were demonstrated. The effects of testosterone (10μg/100g body weight) on renal PAO and DAO activities were also studied. The differences between sexes in both PAO and DAO activities were most clearly expressed in the immature kidney. At the age of 20 days PAO and DAO activities were 1.52 fold (p < 0.01) and 1.75 (p < 0.02) respectively higher in male mouse kidney than in female. Maturational processes reflected in significant increases in polyamine- oxidizing enzyme activities mainly in female mouse kidney, comparable with the gain in the kidney wet weight. Our data show that testosterone is able to influence renal PAO and DAO activities in addition to the well-known stimulation of polyamine biosynthesis. The hormonal effects were sex and age dependent. The influence of testosterone on renal PAO activity was mainly age dependent. The slight stimulation of renal PAO activity observed in 20- and 50-day old mice, 24h after testosterone administration, change with a decrease in the enzyme activity at the age of 70 days. The effects of testosterone on renal DAO activity were mainly sex dependent. Testosterone caused stimulation of DAO activity with a very close magnitude (nearly twice) in female mouse kidney, independently of the age of mice. In contrast, in male mice the hormone treatment resulted in a statistically significant increase in renal DAO activity at the age of 70 days (.1.3 fold, p < 0.05) only. It could be suggested that our data indicate the different contribution of renal PAO and DAO in androgen regulation of polyamine levels, depending on sex and the stage of the postnatal development.

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Authors and Affiliations

  1. Department of Human and Animal Physiology, Faculty of Biology, University of Sofia “St. Kliment Ohridski”, Sofia, Bulgaria

    I. Jotova, V. Pavlov & O. Dimitrov

  2. Department of Molecular Biology, The Hebrew University-Hadassah Medical School, Jerusalem, Israel

    U. Bachrach

Authors
  1. I. Jotova
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  2. V. Pavlov
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  3. O. Dimitrov
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  4. U. Bachrach
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Jotova, I., Pavlov, V., Dimitrov, O. et al. Developmental aspects of polyamine-oxidizing enzyme activities in the mouse kidney. Effects of testosterone. Amino Acids 17, 267–276 (1999). https://doi.org/10.1007/BF01366925

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  • DOI: https://doi.org/10.1007/BF01366925

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