Related Experiment Video

Updated: Oct 1, 2026

Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants
07:08

Long-term Behavioral and Reproductive Consequences of Embryonic Exposure to Low-dose Toxicants

Published on: March 6, 2018

Toxic effects of 2,3,7,8-tetrachlorodibenzo-p-dioxin and related compounds

P I. Mitrou1, G Dimitriadis, S A. Raptis

  • 1Second Department of Internal Medicine, Research Institute and Diabetes Center, Athens University Medical School, 'Evangelismos' Hospital, P.O. Box 171 51, GR-100 24, Athens, Greece

European Journal of Internal Medicine
|September 15, 2001
PubMed

Insights

Dioxin-type chemicals cause significant toxicity, including body weight loss and organ damage. These persistent toxins induce hyperplastic, hypertrophic, and atrophic changes in various animal tissues.

Area of Science:

  • Environmental Toxicology
  • Biochemistry
  • Pathology

Background:

  • Dioxin-type chemicals are persistent environmental pollutants known for their toxicity.
  • Exposure can lead to a range of adverse health effects, even at low doses.
  • Understanding the biochemical mechanisms underlying dioxin toxicity is crucial for risk assessment.

Purpose of the Study:

  • To review the serious toxic effects of dioxin-type chemicals.
  • To examine the biochemical basis of dioxin-induced lesions.
  • To highlight consistent toxicological endpoints, such as body weight loss.

Main Methods:

  • Review of existing literature on dioxin toxicity.
  • Analysis of histopathological findings in animal models.
  • Examination of biochemical alterations associated with dioxin exposure.

Main Results:

  • Consistent observation of body weight loss as a primary toxic effect.
  • Histopathological changes include hyperplasia and hypertrophy in the gastrointestinal mucosa and urinary tract epithelium.
  • Atrophic changes in the thymus and mixed hyperplasia/necrosis in the liver are also noted.
  • Endocrine disruption and altered carbohydrate and lipid metabolism are significant findings.

Conclusions:

  • Dioxin-type chemicals induce a wide spectrum of toxic effects with long-lasting impacts.
  • The observed histopathological and biochemical changes underscore the potent toxicity of these compounds.
  • Further research into the biochemical mechanisms is warranted to mitigate dioxin-related health risks.

More Related Videos

A Murine Pancreatic Islet Cell-based Screening for Diabetogenic Environmental Chemicals07:39

A Murine Pancreatic Islet Cell-based Screening for Diabetogenic Environmental Chemicals

Published on: June 25, 2018

Vinyl Chloride and High-Fat Diet as a Model of Environment and Obesity Interaction09:15

Vinyl Chloride and High-Fat Diet as a Model of Environment and Obesity Interaction

Published on: January 12, 2020

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...
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,...
Drug Toxicity: Dose-Dependent Reactions01:24

Drug Toxicity: Dose-Dependent Reactions

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...
Bioactivation and Tissue Toxicity01:25

Bioactivation and Tissue Toxicity

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...
Toxicity Testing in Animals01:23

Toxicity Testing in Animals

Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
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...