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Related Concept Videos

Types of Toxins01:36

Types of Toxins

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.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Bacterial Toxins01:12

Bacterial Toxins

Bacterial toxins are sophisticated virulence factors that enable pathogenic bacteria to interact with, invade, and damage host tissues. These toxins fall broadly into two types: protein exotoxins, which are secreted into the environment and target specific host receptors, and lipopolysaccharide endotoxins, which are structural components of the bacterial outer membrane released primarily during bacterial lysis or membrane shedding. Exotoxins generally act more selectively, binding to cell...
Toxic Reactions: Overview01:26

Toxic Reactions: Overview

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,...
Antidotes01:17

Antidotes

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.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
An example of an antidote is atropine, which counteracts the detrimental effects of cholinesterase inhibitors. It achieves this by deactivating muscarinic receptors,...
Toxidromes: Clinical Features01:30

Toxidromes: Clinical Features

Toxidromes are specific patterns of symptoms resulting from toxic substance exposure. They help in the identification and treatment of poisoning. The symptoms of each toxidrome group indicate poisoning by a certain class of chemicals or drugs.1. Sympathomimetic: Stimulates the sympathetic nervous system. Symptoms include agitation, increased heart rate (HR), blood pressure (BP), respiratory rate (RR), temperature, and pupil size. Drugs like cocaine and amphetamines, along with tremors and...
Drug Toxicity: Overview01:00

Drug Toxicity: Overview

Drug toxicity quantifies the harm a compound causes to an organism, varying by dose and potentially impacting whole systems or specific organs like the liver. Toxic reactions may arise from venomous insect or spider bites, with effects ranging from mild symptoms to severe outcomes such as brain damage or death. Common forms of acute poisoning include ethanol intoxication and overdose of pain or fever medications, with substances like GHB and heroin being particularly lethal at doses close to...

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Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects
09:45

Harvesting Venom Toxins from Assassin Bugs and Other Heteropteran Insects

Published on: April 21, 2018

Toxins and venoms.

Ernest Hodgson1

  • 1Department of Environmental and Molecular Toxicology, North Carolina State University, Raleigh, North Carolina, USA.

Progress in Molecular Biology and Translational Science
|September 15, 2012
PubMed
Summary
This summary is machine-generated.

This study explores toxins and venoms from diverse organisms, including microbes, plants, and animals. It highlights their chemical diversity and classification, impacting ecosystems and military applications.

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Area of Science:

  • Toxicology
  • Biochemistry
  • Ecology

Background:

  • Toxins and venoms are produced by a wide array of organisms, from microorganisms to complex animals.
  • These substances are significant in natural and agroecosystems, as well as in military contexts.
  • They represent a vast range of chemical classes.

Purpose of the Study:

  • To classify toxins and venoms based on their producing organisms.
  • To provide a selection of important examples within each category.
  • To discuss the toxicological significance and chemical diversity of natural toxins.

Main Methods:

  • Classification of toxins and venoms by organism source (e.g., mycotoxins, algal toxins, insect venoms).
  • Review of chemical classes and properties of selected toxins.
  • Examination of toxicological effects, including acute, chronic, and dose-dependent therapeutic potential.

Main Results:

  • Toxins are broadly categorized by their biological origin.
  • Plant toxins are a subset of phytochemicals with varied toxicological profiles.
  • Some plant toxins exhibit dose-dependent effects, acting as therapeutic agents at lower concentrations.

Conclusions:

  • Understanding the classification and chemical nature of toxins is crucial for toxicological assessment.
  • Plant-derived toxins have diverse applications and toxicological significance.
  • The study provides a foundational overview of important natural toxins and venoms.