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Related Concept Videos

Drug Metabolism: Phase I Reactions01:17

Drug Metabolism: Phase I Reactions

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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,...
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Drug Biotransformation: Overview01:28

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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...
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Pharmacokinetics: Overview01:10

Pharmacokinetics: Overview

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Pharmacokinetics is a scientific discipline that focuses on the journey of a drug within the body, encompassing four key stages: absorption, distribution, metabolism, and elimination. The first stage, absorption, involves the drug's transfer into the bloodstream. Several factors dictate the extent and speed of this process. For example, the liver often metabolizes oral drugs before they reach systemic circulation, leading to only partial absorption. In contrast, intravenous (IV)...
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Electron Transport Chain: Complex III and IV01:43

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During the electron transport chain, electrons from NADH and FADH2 are first transferred to complexes I and II, respectively. These two complexes then transfer the electrons to ubiquinol, which carries them further to complex III. Complex III passes the electrons across the intermembrane space to Cyt c, which carries them further to complex IV. Complex IV donates electrons to oxygen and reduces it to water. As electrons pass through complexes I, III, and IV, the energy released aids the pumping...
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Drug Metabolism: Phase II Reactions01:14

Drug Metabolism: Phase II Reactions

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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...
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Drug Absorption: Overview01:17

Drug Absorption: Overview

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The process of drug absorption signifies the transition of a drug from its site of administration into the plasma. This process is influenced by various factors, including the route of administration, the anatomy of the absorption site, the mechanism of absorption, gut motility, and the drug's physicochemical properties.
When drugs are injected intravenously, they directly enter the systemic circulation. Alternatively, orally administered drugs navigate through the gastrointestinal (GI)...
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Updated: Sep 18, 2025

Mass Spectrometry and Luminogenic-based Approaches to Characterize Phase I Metabolic Competency of In Vitro Cell Cultures
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Coenzyme Q10 and Xenobiotic Metabolism: An Overview.

David Mantle1, Beatrice A Golomb2

  • 1Pharma Nord (UK) Ltd., Morpeth NE61 2DB, Northumberland, UK.

International Journal of Molecular Sciences
|June 26, 2025
PubMed
Summary

Environmental toxins harm mitochondria, reducing energy and increasing oxidative stress. Coenzyme Q10 (CoQ10) supplementation may protect against these toxic effects by supporting mitochondrial function and reducing inflammation.

Keywords:
carcinogenscoenzyme Q10endocrine disruptersheavy metalsindustrial solventslifestyle toxinspesticidespharmacological drugsxenobiotics

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Area of Science:

  • Environmental toxicology
  • Mitochondrial biology
  • Biochemistry

Background:

  • Mitochondria are key targets of environmental toxic chemicals.
  • Toxicants disrupt the electron transport chain, reducing ATP production and increasing oxidative stress, apoptosis, and inflammation.
  • Coenzyme Q10 (CoQ10) plays vital roles in mitochondrial function and possesses antioxidant, anti-apoptotic, and anti-inflammatory properties.

Purpose of the Study:

  • To review the potential role of CoQ10 in mitigating mitochondrial dysfunction induced by environmental toxins.
  • To explore CoQ10's protective effects against various toxicants.

Main Methods:

  • Literature review of studies investigating CoQ10 and environmental toxins.
  • Analysis of CoQ10's mechanisms of action in relation to mitochondrial damage.

Main Results:

  • CoQ10 demonstrates potential in improving mitochondrial function under toxicant exposure.
  • Evidence suggests CoQ10 can mediate adverse effects from pesticides, heavy metals, solvents, endocrine disruptors, carcinogens, drugs, and lifestyle toxicants.
  • CoQ10's antioxidant and anti-inflammatory actions are crucial in its protective role.

Conclusions:

  • Supplementary CoQ10 may be a viable strategy to counteract environmental chemical-induced mitochondrial damage.
  • Further research is warranted to fully elucidate CoQ10's therapeutic potential in environmental toxicology.
  • CoQ10's multifaceted protective mechanisms highlight its importance in cellular health against environmental insults.