Related Experiment Video
Updated: Jul 20, 2026
10:44
Mass Spectrometry and Luminogenic-based Approaches to Characterize Phase I Metabolic Competency of In Vitro Cell Cultures
Published on: March 28, 2017
Xenobiotic metabolism in Australian marsupials
I Stupans1, B Jones, R A McKinnon
1Centre for Pharmaceutical Research, School of Pharmacy and Medical Sciences, University of South Australia, North Terrace, SA, 5000, Adelaide, Australia. ieva.stupans@unisa.edu.au
Summary
Australian marsupials possess unique adaptations for processing environmental toxins. This study reviews current knowledge of xenobiotic metabolism in these fascinating animals, highlighting gaps in our understanding.
Area of Science:
- Zoology and Biochemistry
- Comparative Physiology
- Ecotoxicology
Background:
- Australian marsupials are a unique fauna with distinct evolutionary paths.
- Xenobiotic metabolism, the enzymatic modification of foreign compounds, is crucial for survival against environmental toxins.
- Limited research exists on xenobiotic metabolism enzymes in Australian marsupials, particularly folivores like koalas and possums.
Purpose of the Study:
- To provide a comprehensive overview of the current understanding of xenobiotic metabolism in Australian marsupials.
- To highlight the unique adaptations of folivore marsupials in handling dietary toxins.
- To identify knowledge gaps in marsupial xenobiotic metabolism for future research.
Main Methods:
- Literature review of existing studies on xenobiotic metabolism in Australian marsupials.
- Comparative analysis of xenobiotic metabolism pathways in different marsupial species.
- Focus on folivore marsupials, including the koala (Phascolarctos cinereus) and brushtail possum (Trichosurus vulpecula).
Main Results:
- Current knowledge of marsupial xenobiotic metabolism is superficial, with significant gaps identified.
- Folivore marsupials exhibit unique metabolic adaptations, but these are not well-characterized.
- Enzymes involved in detoxification pathways in these species remain largely unexamined.
Conclusions:
- Further research is critical to elucidate the xenobiotic metabolism pathways in Australian marsupials.
- Understanding these pathways is essential for the conservation and management of unique marsupial fauna.
- The study underscores the need for deeper investigation into the biochemical adaptations of koalas and possums.
Related Concept Videos
01:16Drug Biotransformation: Overview
Pharmaceutical substances known as xenobiotics are predominantly lipophilic and nonionized. This enables them to permeate lipid bilayers, such as cell membranes, and interact with intracellular target receptors. Lipophilic drugs have an advantage in crossing biological barriers and reaching their intended sites of action. However, lipophilic drugs often have a restricted capacity for renal expulsion or elimination from the body. When these drugs enter the kidneys and undergo glomerular...
01:28Drug Biotransformation: Overview
Biotransformation, also known as drug metabolism, is a vital physiological process that chemically alters drugs, facilitating their elimination from the body and terminating their action. This process involves two main phases: phase I and phase II reactions. Phase I reactions, including oxidation, reduction, and hydrolysis, introduce or unmask polar functional groups on the drug molecule, thereby increasing its water solubility. By enhancing water solubility, the drug becomes more hydrophilic...
01:19Factors Affecting Drug Biotransformation: Biological
Biological factors significantly impact drug metabolism, influencing drug clearance, efficacy, and potential toxicity.
Species differences: Variations in enzyme systems across species can cause disparities in drug metabolism. For instance, humans may metabolize certain drugs faster than rodents, altering therapeutic effects.
Strain differences: Genetic variations within a species can result in differing enzyme activity, impacting drug response and toxicity. For example, some mouse strains may...
Species differences: Variations in enzyme systems across species can cause disparities in drug metabolism. For instance, humans may metabolize certain drugs faster than rodents, altering therapeutic effects.
Strain differences: Genetic variations within a species can result in differing enzyme activity, impacting drug response and toxicity. For example, some mouse strains may...
01:20Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion
Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
01:24Pharmacokinetics in Pediatric Patients: Drug Metabolism
In pediatric care, understanding the nuances of hepatic drug metabolism is crucial, as it significantly differs from that of adults. This divergence is primarily due to the developmental stage of drug-metabolizing enzymes, which affects how medications are processed in the body. In neonates, for instance, the activity of Phase I enzymes—critical for the initial breakdown of drugs—is markedly reduced, functioning at just 20–40% of the levels seen in adults. This reduction poses a challenge in...
01:27Pharmacogenetics of Drug Metabolism: Overview
Genetic polymorphism in drug metabolism is crucial to the inter-individual variability observed in drug responses. Drug metabolism primarily involves the chemical modification of drugs and other xenobiotics to enhance their elimination by increasing their polarity. Two main classes of enzymes mediate this biotransformation process: Phase I enzymes, primarily cytochrome P450s, catalyze oxidation and reduction reactions, while other enzymes, such as esterases, mediate hydrolysis, and Phase II...