Effects of Estrogens on Pig Liver Enzymes
Author Information
Author(s): Galia Zamaratskaia, Martin Krøyer Rasmussen, Isabelle Herbin, Bo Ekstrand, Vladimir Zlabek
Primary Institution: Swedish University of Agricultural Sciences
Hypothesis
The study aims to evaluate the regulation of CYP1A and CYP2E1 activity by various steroids in porcine liver microsomes.
Conclusion
17β-estradiol and 17α-estradiol inhibit certain liver enzyme activities in pigs, but only at concentrations much higher than physiological levels.
Supporting Evidence
- 17β-estradiol and 17α-estradiol inhibited EROD and MROD activities at 100 µM concentration.
- PNPH activities were inhibited only by 100 µM of 17β-estradiol.
- The study used in vitro models to assess enzyme activity in porcine liver microsomes.
Takeaway
The study found that two types of hormones can stop certain liver enzymes from working, but only when there's a lot of these hormones present, much more than what pigs usually have.
Methodology
The study used liver microsomes from six male pigs to assess the effects of various steroids on enzyme activities.
Limitations
The significance of the findings in vivo is uncertain due to the high concentrations of estrogens used, which exceed physiological levels.
Participant Demographics
Three entire male pigs of a crossbreed between Yorkshire×Landrace and three entire male pigs of a crossbreed between Landrace×Yorkshire and Duroc.
Statistical Information
Confidence Interval
0.001–0.087
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website