Effect of Sustained Administration of Thymol on Its Bioaccessibility and Bioavailability in Rabbits
2021
Kristina Bacova | Karin Zitterl Eglseer | Gesine Karas Räuber | Lubica Chrastinova | Andrea Laukova | Margareta Takacsova | Monika Pogany Simonova | Iveta Placha
The objective of this study was the detection of thymol in rabbit plasma, tissues, large intestinal content, and faeces. Forty-eight rabbits were divided into control and experimental groups (thymol 250 mg/kg feed). Thymol was administered for 21 days and then withdrawn for 7 days. Concentration of thymol in the intestinal wall (IW) was significantly higher than in plasma (<i>p</i> < 0.05) and liver (<i>p</i> < 0.05); in the kidneys it was significantly higher than in plasma (<i>p</i> < 0.05) and liver (<i>p</i> < 0.05) during thymol addition. Thymol in IW was significantly higher than in plasma also after withdrawal (<i>p</i> < 0.01). Significant correlation (r<sub>s</sub> = −1.000, <i>p</i> < 0.01) between IW and plasma points to the intensive absorption of thymol from the intestine, while the correlation between plasma and liver (r<sub>s</sub> = 0.786, <i>p</i> < 0.05) indicates intensive biotransformation and excretion processes in liver. Significant correlation between liver and kidney (r<sub>s</sub> = 0.738, <i>p</i> < 0.05) confirms the intensive metabolism of thymol in the kidney. During the withdrawal period, thymol was detected above trace amounts only in faeces, and was significantly higher than in the colon during both periods (<i>p</i> < 0.01). Results show intensive biotransformation of thymol in the rabbit organism.
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