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Related Concept Videos

Anticholinesterase Agents: Poisoning and Treatment01:26

Anticholinesterase Agents: Poisoning and Treatment

Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.     
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is slower than the...
Indirect-Acting Cholinergic Agonists: Pharmacological Actions01:30

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Indirect-acting cholinergic agonists, also known as anticholinesterases, exert their pharmacological effects by enhancing cholinergic transmission in various body parts, including the neuromuscular junction, autonomic cholinergic synapses, and the brain.
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Oxidation of Phenols to Quinones01:17

Oxidation of Phenols to Quinones

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Related Experiment Video

Updated: May 16, 2026

Treating SCA1 Mice with Water-Soluble Compounds to Non-Specifically Boost Mitochondrial Function
11:47

Treating SCA1 Mice with Water-Soluble Compounds to Non-Specifically Boost Mitochondrial Function

Published on: January 22, 2017

Merit of quinacrine in the decrease of ingested sulfite-induced toxic action in rat brain.

Ceren Kencebay1, Narin Derin, Ozlem Ozsoy

  • 1Akdeniz University, Medical School, Department of Biophysics, Antalya, Turkey.

Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association
|November 22, 2012
PubMed
Summary

Ingested sulfites can alter nerve signals and cause brain cell damage, potentially mediated by secretory phospholipase A2 (sPLA2). Quinacrine treatment may mitigate these harmful sulfite effects.

Related Experiment Videos

Last Updated: May 16, 2026

Treating SCA1 Mice with Water-Soluble Compounds to Non-Specifically Boost Mitochondrial Function
11:47

Treating SCA1 Mice with Water-Soluble Compounds to Non-Specifically Boost Mitochondrial Function

Published on: January 22, 2017

Area of Science:

  • Neuroscience
  • Toxicology
  • Biochemistry

Background:

  • Sulfites are common food additives.
  • Oxidative stress and apoptosis are implicated in neurological damage.
  • Secretory phospholipase A2 (sPLA2) is involved in inflammatory processes.

Purpose of the Study:

  • To investigate the role of sPLA2 in sulfite-induced alterations of somatosensory evoked potentials (SEP).
  • To examine the effects of sulfite exposure on lipid peroxidation, apoptosis, and DNA damage.
  • To evaluate the protective potential of quinacrine against sulfite toxicity.

Main Methods:

  • Rats were administered sodium metabisulfite (sulfite source) with or without quinacrine.
  • Somatosensory evoked potentials (SEP) were recorded.
  • Plasma-S-sulfonate, TBARS (lipid peroxidation marker), and sPLA2 levels were measured.
  • Immunohistochemistry was used to assess apoptosis (caspase-3, TUNEL).

Main Results:

  • Sulfite exposure significantly prolonged SEP latencies.
  • Quinacrine administration reversed SEP alterations.
  • Sulfite increased lipid peroxidation and apoptotic markers (caspase-3, TUNEL).
  • Quinacrine reduced brain TBARS and apoptotic markers.
  • sPLA2 levels remained elevated despite quinacrine treatment.

Conclusions:

  • Secretory phospholipase A2 (sPLA2) may mediate sulfite-induced SEP alterations, oxidative stress, and apoptosis.
  • Quinacrine demonstrates neuroprotective effects against sulfite toxicity.
  • Further research into sPLA2 pathways is warranted for sulfite-related neurotoxicity.