Related Experiment Video
Updated: May 5, 2026
09:03
The CYP2D6 Animal Model: How to Induce Autoimmune Hepatitis in Mice
Published on: February 3, 2012
21.6K
Summary
Cyclofenil, a non-steroidal ovulation stimulant, caused reversible liver damage in thirty patients. This hepatic reaction was likely due to metabolic idiosyncrasy.
Area of Science:
- Hepatology
- Pharmacology
- Endocrinology
Background:
- Cyclofenil is a non-steroidal drug known for its ovulation-stimulating properties.
- Hepatic reactions are a potential adverse effect of drug therapies.
Observation:
- A review of thirty patients experiencing hepatic reactions to cyclofenil was conducted.
- The observed liver damage was associated with the use of this ovulation stimulant.
Findings:
- The liver damage observed in patients was likely a result of metabolic idiosyncrasy.
- All thirty patients in the study showed reversible liver damage.
Implications:
- This study highlights the importance of monitoring liver function in patients undergoing cyclofenil therapy.
- Understanding metabolic idiosyncrasy is crucial for predicting and preventing drug-induced liver injury.
- Further research into the mechanisms of cyclofenil-induced hepatotoxicity may inform safer drug development.
Related Concept Videos
01:17Drug Metabolism: Phase I Reactions
5.1K
A phase I reaction is a biochemical process that introduces a functionally reactive polar group to a substance. This transformation predominantly occurs in the liver, facilitated by the cytochrome P450 system of hemoproteins situated in the lipophilic endoplasmic reticulum of cells. The metabolite generated through this process can have varying polarities. If it is sufficiently polar, it can be easily excreted in the urine due to its water compatibility. However, if the metabolite is nonpolar,...
5.1K
01:14Drug Metabolism: Phase II Reactions
4.7K
Phase II reactions are essential for the detoxification and elimination of drugs from the body. These reactions involve the conjugation of parent drugs or their phase I metabolites with endogenous molecules, resulting in more hydrophilic drug conjugates. The primary conjugation reactions in this phase are sulfation and glucuronidation. Both sulfation and glucuronidation typically produce biologically inactive metabolites. However, in some cases involving prodrugs, active metabolites may be...
4.7K
01:19Phase I Reactions: Oxidation of Aliphatic and Aromatic Carbon-Containing Systems
948
Phase I biotransformation reactions are integral to drug metabolism, predominantly involving oxidative, reductive, and hydrolytic transformations. Chief among these are oxidative reactions, which enhance the hydrophilicity of xenobiotics and introduce polar functional groups to facilitate their elimination from the body.
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
Oxidation reactions are fundamental in aromatic carbon-containing systems. An example is the hydroxylation of phenobarbital, a process that transforms it into...
948
01:17Hepatic Drug Excretion: Enterohepatic Cycling
3.6K
Enterohepatic cycling involves the active secretion of drugs and their metabolites into the bile via transporters in the canalicular membrane of hepatocytes. This secretion is an integral part of the digestive process, releasing these substances into the gastrointestinal (GI) tract.
Post-release drugs and metabolites can be reabsorbed into the body from the intestine. For conjugated metabolites like glucuronides, reabsorption requires enzymatic hydrolysis by intestinal microflora. This...
Post-release drugs and metabolites can be reabsorbed into the body from the intestine. For conjugated metabolites like glucuronides, reabsorption requires enzymatic hydrolysis by intestinal microflora. This...
3.6K
01:01Hypersensitivity Reactions: Cytolytic Reactions
208
Type II hypersensitivity involves IgG and IgM antibodies targeting cell surface antigens, leading to cell destruction. This can occur through complement activation, antibody-dependent cell-mediated cytotoxicity (ADCC), or acting as opsonins for phagocytosis. When excessive, these reactions cause significant tissue damage.Drug-induced hemolytic anemia is a common example, where drugs like penicillin or cephalosporins bind to red blood cells, forming drug-protein complexes. These complexes...
208
01:16Drug toxicity: Idiosyncratic Reactions
220
Idiosyncratic drug reactions represent abnormal chemical responses that vary significantly among individuals, ranging from extreme sensitivity to low doses to insensitivity to high doses. These reactions often occur due to the drug's covalent binding with serum proteins, forming a foreign hapten that triggers an immunotoxicological response. The variability in drug reactions has a strong pharmacogenetic foundation, with genetic differences crucial in how individuals metabolize drugs. For...
220