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Related Concept Videos

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.
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Local Anesthetics: Adverse Effects01:12

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While local anesthetics are generally safe and well-tolerated, they can occasionally cause adverse effects that vary in severity. Local anesthetics can induce toxicity at two distinct levels. They can either produce local effects through direct contact with the neural elements or be absorbed into the bloodstream from the injection site, leading to systemic effects.
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Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
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Types of Toxins01:36

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Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
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Drugs affecting neurotransmitter synthesis can impact the adrenergic neuron and the synthesis of neurotransmitters. For example, α-methyltyrosine and carbidopa target specific enzymes involved in catecholamine synthesis. α-methyltyrosine inhibits the enzyme tyrosine hydroxylase, which converts tyrosine into dopamine. By blocking this enzyme, α-methyltyrosine reduces dopamine production and other catecholamines. Carbidopa, on the other hand, inhibits the enzyme dopa decarboxylase,...
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Local Anesthetics: Differential Sensitivity of Nerve Fibers01:24

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Local anesthetics (LAs) block the sodium channels of nerve trunks, sensory nerve endings, and neuromuscular junctions. Although LAs can block all kinds of nerves, the sensitivity of nerve fibers differs according to nerve types and structures. LAs are known to block myelinated fibers faster than unmyelinated ones. Also, they block pain or sensory neurons at low concentrations without affecting the motor neurons involved in muscle contractions. This helps relieve labor pain without affecting the...
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Nerve Excitability Assessment in Chemotherapy-induced Neurotoxicity
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Toxic neuropathies.

Alexander M Rossor1, Hadi Manji

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This summary is machine-generated.

Neuropathic complications from immunotherapy, nitrous oxide, and ciguatera toxin exposure are increasing. Early recognition and symptomatic treatment are crucial, with further research needed for effective therapies.

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Area of Science:

  • Neurology
  • Toxicology
  • Immunology

Background:

  • Immunotherapy and linezolid have expanded therapeutic uses, while recreational nitrous oxide use is a growing global concern.
  • Drug-resistant tuberculosis (TB) and increasing toxin exposure due to global warming present significant public health challenges.
  • Neuropathy is a major morbidity associated with these conditions, necessitating focused clinical attention.

Conclusions:

  • Neuropathy associated with immunotherapy, nitrous oxide, and ciguatera requires early recognition and symptomatic management.
  • Nitrous oxide toxicity should be considered in patients presenting with neuropathy, especially younger individuals.
  • Ciguatera toxicity is under-recognized and its prevalence is expected to rise with global warming, necessitating further research into acute and chronic effects.