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Full-Text Articles in Pharmacology, Toxicology and Environmental Health
Effects Of Antibiotic Treatment On The Expression Of Hepatic And Intestinal Cytochrome P450, Bruno Pereira De Carvalho
Effects Of Antibiotic Treatment On The Expression Of Hepatic And Intestinal Cytochrome P450, Bruno Pereira De Carvalho
Legacy Theses & Dissertations (2009 - 2024)
Expression of metabolic enzymes Cytochrome P450 (CYP) is highly affected by drugs, diseases, age and gender. The Intestinal microflora has been suggested to play a role in regulating CYP expression and antibiotic treatments would lead to changes in level and composition of microbiota in mouse gut. This study aims to analyze CYP expression changes in the liver and small intestine resulted from the reduction of intestinal microflora by antibiotics. Impacts on bile acid signaling were also analyzed for a better comprehension of the mechanisms involved in this modulation. Female C57BL/6J mice (9- to 13-week old) were treated with ampicillin (AMP) …
Function And Regulation Of Intestinal P450 Enzymes : Insights From Conditional Cytochrome P450 Reductase Knockout Mouse Models, Yi Zhu
Legacy Theses & Dissertations (2009 - 2024)
The overall goal of this thesis work was to investigate the function and regulation of intestinal P450 enzymes (P450s). The central hypotheses are that 1) small intestinal (SI) P450s play an important role in the first-pass clearance of oral drugs and in bioactivation of chemicals that cause intestinal toxicity, 2) endogenous regulatory compounds produced by intestinal P450s are important for protection against chemical-induced colon inflammation, and 3) there is a cross talk between the liver and the SI that helps to maintain the overall xenobiotic-metabolism capacity of the digestive tract.