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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.     
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In cases of acute poisoning, the primary objective is to prevent further absorption of the toxic substance into the body. Immediate interventions using various decontamination techniques targeting the gastrointestinal (GI) tract can achieve this. Decontamination is crucial to prevent poison from entering the systemic circulation, which involves washing affected areas with water and mild soap and removing contaminated clothing. Once external decontamination is done, attention must be turned to...
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Antidotes01:17

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Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
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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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[A poisoned gift].

Bertrand Jordan1

  • 1UMR 7268 ADÉS, Aix-Marseille, Université/EFS/CNRS ; CoReBio PACA, case 901, Parc scientifique de Luminy, 13288 Marseille Cedex 09, France.

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Summary
This summary is machine-generated.

Genome-wide association studies (GWAS) identified a significant genetic locus on chromosome 3 associated with severe COVID-19. This region may stem from ancient Neanderthal and Sapiens interbreeding events.

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Area of Science:

  • Genetics
  • Evolutionary Biology
  • Infectious Disease Epidemiology

Background:

  • Severe COVID-19 presents a significant global health challenge.
  • Genetic factors play a crucial role in determining disease severity.
  • Ancient human history, including interbreeding with archaic hominins, may influence modern human susceptibility to diseases.

Purpose of the Study:

  • To identify genetic loci associated with severe COVID-19.
  • To investigate the evolutionary origins of identified genetic risk factors.

Main Methods:

  • Genome-wide association studies (GWAS) were performed on a cohort of severe COVID-19 patients.
  • Fine-mapping and imputation techniques were used to identify specific genetic variants.
  • Phylogenetic analysis and comparative genomics were employed to trace the ancestry of the identified genetic segment.

Main Results:

  • A major genetic locus on chromosome 3 was significantly associated with severe COVID-19.
  • A 50 kb segment within this locus showed evidence of archaic introgression.
  • This segment is likely of Neanderthal origin, inherited through ancient admixture with anatomically modern humans.

Conclusions:

  • Genetic variations on chromosome 3 contribute to COVID-19 severity.
  • Ancient introgression from Neanderthals may represent a significant evolutionary factor influencing the human immune response to SARS-CoV-2.
  • This finding opens new avenues for understanding host-pathogen interactions and human evolution.