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Related Concept Videos

Drug Toxicity: Dose-Dependent Reactions01:24

Drug Toxicity: Dose-Dependent Reactions

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Drug toxicities can be stratified into pharmacological, pathological, or genotoxic based on their mechanisms. The incidence and severity of these toxicities generally increase with the drug's concentration in the body and exposure time.Pharmacological toxicity is evident when the therapeutic effects of drugs overshoot into adverse reactions in a predictable, dose-dependent manner. Central nervous system (CNS) depression from barbiturates is a classic example, with effects escalating from...
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Bioactivation and Tissue Toxicity01:25

Bioactivation and Tissue Toxicity

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Bioactivation is a metabolic process that transforms less reactive substances into highly reactive metabolites, initiating tissue toxicity. This transformation can lead to various toxic effects, including carcinogenesis and teratogenesis. Reactive metabolites are classified into two main types: electrophiles and free radicals.Electrophiles are electron-deficient species and are produced primarily by the enzyme cytochrome P-450 during the metabolism of compounds containing carbon, nitrogen, or...
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Toxic Reactions: Overview01:26

Toxic Reactions: Overview

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When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...
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Hepatic Encephalopathy01:29

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DefinitionHepatic encephalopathy is a reversible neurologic syndrome that results from advanced liver dysfunction or portosystemic shunting. It leads to disturbances in cognition, behavior, and motor function due to the brain’s exposure to gut-derived toxins that the liver fails to detoxify.EtiologyThis condition develops either in the setting of acute fulminant hepatitis or progressively during chronic liver disease, such as cirrhosis and portal hypertension. Portosystemic...
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Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists01:28

Chemotherapy-Induced Nausea and Vomiting: Neurokinin-1 Receptor Antagonists

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Neurokinin 1 (NK1) receptors are distributed across the GI tract, vagal afferents, and key CNS regions including the central vomiting center and chemoreceptor trigger zone (CTZ) Chemotherapy agents stimulate enterochromaffin cells in the gastrointestinal (GI) tract to release large amounts of substance P (SP). SP is a neuropeptide released by specific sensory nerves in response to many different stressors, including those in the GI mucosa affected by chemotherapy.  SP binds and activates...
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Drug toxicity: Idiosyncratic Reactions01:16

Drug toxicity: Idiosyncratic Reactions

232
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...
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Updated: May 7, 2026

Chemotherapy-induced Vascular Toxicity - Real-time In vivo Imaging of Vessel Impairment
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Chemotherapy-induced hepatotoxicity.

Ameet V Thatishetty1, Nicholas Agresti, Christopher B O'Brien

  • 1Department of Medicine, Memorial Health, University Medical Center, 4700 Waters Avenue, Savannah, GA 31403, USA.

Clinics in Liver Disease
|October 9, 2013
PubMed
Summary
This summary is machine-generated.

Chemotherapy can cause unpredictable liver damage (hepatotoxicity), especially in patients with existing liver issues. This liver injury may manifest in various ways and can lead to severe outcomes like cirrhosis.

Keywords:
CancerChemotherapyDrugsHepatotoxicityLiver

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Area of Science:

  • Hepatology
  • Oncology
  • Pharmacology

Background:

  • Hepatotoxicity is a significant concern in cancer treatment.
  • Most chemotherapy-induced liver injury is idiosyncratic, making it unpredictable.
  • Pre-existing liver dysfunction increases the risk of chemotherapy-related hepatotoxicity.

Purpose of the Study:

  • To review the mechanisms and clinical presentations of chemotherapy-induced hepatotoxicity.
  • To highlight the importance of liver function monitoring during chemotherapy.
  • To discuss the spectrum of outcomes associated with chemotherapy-induced liver injury.

Main Methods:

  • Literature review of chemotherapy-induced hepatotoxicity.
  • Analysis of clinical presentations and outcomes.
  • Discussion of risk factors and management considerations.

Main Results:

  • Chemotherapy can cause various forms of liver injury, including hepatocellular damage, cholestasis, and sinusoidal obstruction syndrome.
  • Liver dysfunction may necessitate chemotherapy dose adjustments.
  • Outcomes range from self-resolving abnormalities to severe conditions like cirrhosis.

Conclusions:

  • Hepatotoxicity from chemotherapy is complex and often unpredictable.
  • Careful patient selection and monitoring are crucial for managing chemotherapy.
  • Understanding the diverse presentations and potential severity of liver injury is essential for oncologists.