Metabolic syndrome (MetS) is a cluster of risk factors that increase the likelihood of developing cardiovascular, metabolic and other diseases. The pharmacological management of MetS often involves polypharmacy, making it essential to understand how drug-metabolising enzymes, transporters, transcription factors and other proteins involved are affected under different metabolic conditions. This study investigated the relative mRNA expression of key hepatic and intestinal genes involved in drug metabolism, including Cyp1a2, Cyp3a23, Cyp2d1, Cyp2c11, Cyp2c6, Cyp2e1, Cyp7a1, Cyp2b1, Cyp2a1, Abcg5, Abcg8, Abcb1, Nr1i3, Nr1i2, Ahr, Gsta1 and Comt, in four nonobese rat models of MetS: hereditary hypertriglyceridaemic (HHTg), spontaneously hypertensive rat (SHR), SHR expressing transgenic human C-reactive protein (SHR-CRP), and bilaterally ovariectomised Wistar (W-OVX), compared to Wistar controls. Gene expression was quantified by RT-PCR with data normalised using the ΔΔCt method. Between the models studied, measurements showed significant differences in the liver. The upregulation of Cyp2c6 and Cyp3a23 was observed only in SHR; upregulated Cyp2d1 was found in SHR as well as in HHTg rats. The downregulated Cyp1a2 was measured in a condition of hypertriglyceridemia, postmenopause or hypertension. These findings highlight model-specific alterations in gene expression that may affect drug metabolism and interactions. The HHTg may be, in particular, a suitable model for preclinical studies focusing on intestinal drug-drug interactions in MetS-related conditions.

• Klíčová slova
• drug metabolism, metabolic syndrome, rat model,
• MeSH
• játra metabolismus   enzymologie   MeSH
• krysa rodu Rattus MeSH
• lidé MeSH
• membránové transportní proteiny * genetika   metabolismus   MeSH
• messenger RNA * metabolismus   genetika   MeSH
• metabolický syndrom * genetika   metabolismus   MeSH
• modely nemocí na zvířatech MeSH
• potkani inbrední SHR MeSH
• potkani Wistar MeSH
• receptory cytoplazmatické a nukleární * genetika   metabolismus   MeSH
• systém (enzymů) cytochromů P-450 * genetika   metabolismus   MeSH
• zvířata MeSH
• Check Tag
• krysa rodu Rattus MeSH
• lidé MeSH
• mužské pohlaví MeSH
• ženské pohlaví MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• membránové transportní proteiny * MeSH
• messenger RNA * MeSH
• receptory cytoplazmatické a nukleární * MeSH
• systém (enzymů) cytochromů P-450 * MeSH

The development of inflammatory bowel disease (IBD) is associated with alterations in the gut microbiota. There is currently no universal treatment for this disease, thus emphasizing the importance of developing innovative therapeutic approaches. Gut microbiome-derived metabolite butyrate with its well-known anti-inflammatory effect in the gut is a promising candidate. Due to increased intestinal permeability during IBD, butyrate may also reach the liver and influence liver physiology, including hepatic drug metabolism. To get an insight into this reason, the aim of this study was set to clarify not only the protective effects of the sodium butyrate (SB) administration on colonic inflammation but also the effects of SB on hepatic drug metabolism in experimental colitis induced by dextran sodium sulfate (DSS) in mice. It has been shown here that the butyrate pre-treatment can alleviate gut inflammation and reduce the leakiness of colonic epithelium by restoration of the assembly of tight-junction protein Zonula occludens-1 (ZO-1) in mice with DSS-induced colitis. In this article, butyrate along with inflammation has also been shown to affect the expression and enzyme activity of selected cytochromes P450 (CYPs) in the liver of mice. In this respect, CYP3A enzymes may be very sensitive to gut microbiome-targeted interventions, as significant changes in CYP3A expression and activity in response to DSS-induced colitis and/or butyrate treatment have also been observed. With regard to medications used in IBD and microbiota-targeted therapeutic approaches, it is important to deepen our knowledge of the effect of gut inflammation, and therapeutic interventions were followed concerning the ability of the organism to metabolize drugs. This gut-liver axis, mediated through inflammation as well as microbiome-derived metabolites, may affect the response to IBD therapy.

• Klíčová slova
• butyrate, cytochromes P450, drug metabolism, gut inflammation, gut–liver axis,
• Publikační typ
• časopisecké články MeSH

In today's modern society, it seems to be more and more challenging to cope with life stresses. The effect of psychological stress on emotional and physical health can be devastating, and increased stress is associated with increased rates of heart attack, hypertension, obesity, addiction, anxiety and depression. This review focuses on the possibility of an influence of psychological stress on the metabolism of selected antidepressants (TCAs, SSRIs, SNRIs, SARIs, NDRIs a MMAs) and anxiolytics (benzodiazepines and azapirone), as patients treated with antidepressants and/or anxiolytics can still suffer from psychological stress. Emphasis is placed on the drug metabolism mediated by the enzymes of Phase I, typically cytochromes P450 (CYPs), which are the major enzymes involved in drug metabolism, as the majority of psychoactive substances are metabolized by numerous CYPs (such as CYP1A2, CYP2B6, CYP2C19, CYP2C9, CYP2A6, CYP2D6, CYP3A4). As the data on the effect of stress on human enzymes are extremely rare, modulation of the efficacy and even regulation of the biotransformation pathways of drugs by psychological stress can be expected to play a significant role, as there is increasing evidence that stress can alter drug metabolism, hence there is a risk of less effective drug metabolism and increased side effects.

• Klíčová slova
• antidepressants, anxiolytics, cytochrome P450, drug metabolism, psychological stress,
• MeSH
• antidepresiva metabolismus   MeSH
• anxiolytika * metabolismus   MeSH
• biotransformace MeSH
• jaterní mikrozomy metabolismus   MeSH
• lidé MeSH
• psychický stres MeSH
• systém (enzymů) cytochromů P-450 metabolismus   MeSH
• Check Tag
• lidé MeSH
• Publikační typ
• časopisecké články MeSH
• přehledy MeSH
• Názvy látek
• antidepresiva MeSH
• anxiolytika * MeSH
• systém (enzymů) cytochromů P-450 MeSH

Microbiome is now considered as a significant metabolic organ with an immense potential to influence overall human health. A number of diseases that are associated with pharmacotherapy interventions was linked with altered gut microbiota. Moreover, it has been reported earlier that gut microbiome modulates the fate of more than 30 commonly used drugs and, vice versa, drugs have been shown to affect the composition of the gut microbiome. The molecular mechanisms of this mutual relationship, however, remain mostly elusive. Recent studies indicate an indirect effect of the gut microbiome through its metabolites on the expression of biotransformation enzymes in the liver. The aim of this study was to analyse the effect of gut microbiome on the fate of metronidazole in the mice through modulation of system of drug metabolizing enzymes, namely by alteration of the expression and activity of selected cytochromes P450 (CYPs). To assess the influence of gut microbiome, germ-free mice (GF) in comparison to control specific-pathogen-free (SPF) mice were used. First, it has been found that the absence of microbiota significantly affected plasma concentration of metronidazole, resulting in higher levels (by 30%) of the parent drug in murine plasma of GF mice. Further, the significant interaction between presence/absence of the gut microbiome and effect of metronidazole application, which together influence mRNA expression of CAR, PPARα, Cyp2b10 and Cyp2c38 was determined. Administration of metronidazole itself influenced significantly mRNA expression of Cyp1a2, Cyp2b10, Cyp2c38 and Cyp2d22. Finally, GF mice have shown lower level of enzyme activity of CYP2A and CYP3A than their SPF counterparts. The results hence have shown that, beside direct bacterial metabolism, different expression and enzyme activity of hepatic CYPs in the presence/absence of gut microbiota may be responsible for the altered metronidazole metabolism.

• MeSH
• gnotobiologické modely MeSH
• játra * metabolismus   účinky léků   enzymologie   MeSH
• metronidazol * farmakologie   MeSH
• myši MeSH
• regulace genové exprese enzymů účinky léků   MeSH
• střevní mikroflóra * účinky léků   MeSH
• systém (enzymů) cytochromů P-450 * metabolismus   genetika   MeSH
• zvířata MeSH
• Check Tag
• mužské pohlaví MeSH
• myši MeSH
• zvířata MeSH
• Publikační typ
• časopisecké články MeSH
• Názvy látek
• metronidazol * MeSH
• systém (enzymů) cytochromů P-450 * MeSH