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Related Concept Videos

Types of Toxins01:36

Types of Toxins

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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.
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...
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Toxidromes: Clinical Features01:30

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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...
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Bacterial Toxins01:12

Bacterial Toxins

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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...
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Toxic Reactions: Overview01:26

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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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Prevention of Further Absorption of Poison01:14

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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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Toxicity Testing in Animals01:23

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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...
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High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents HPHC
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The human toxome project.

Mounir Bouhifd1, Melvin E Andersen2, Christina Baghdikian3

  • 1Johns Hopkins Bloomberg School of Public Health, Center for Alternatives to Animal Testing, Baltimore, MD, USA.

ALTEX
|March 6, 2015
PubMed
Summary
This summary is machine-generated.

The Human Toxome Project develops methods to identify molecular pathways of toxicity (PoT). This research aims to create a public knowledge base for toxicology and regulatory testing.

Keywords:
alternative methodsmetabolomicsregulatory toxicologysafety sciencestranscriptomics

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Area of Science:

  • Toxicology
  • Molecular Biology
  • Bioinformatics

Background:

  • The Human Toxome Project, funded by NIH, aims to establish methods for identifying, validating, and sharing molecular pathways of toxicity (PoT).
  • Existing toxicological research faces challenges in standardization and data sharing, hindering progress.

Purpose of the Study:

  • To develop concepts and tools for deducing, validating, and sharing molecular pathways of toxicity (PoT).
  • To create a comprehensive public database, the Human Toxome Knowledge-base, for toxicological research and regulatory strategies.

Main Methods:

  • Utilizing estrogenic endocrine disruption as a test case.
  • Phenotyping MCF-7 human breast cancer cells using transcriptomics and mass-spectroscopy-based metabolomics.
  • Developing bioinformatics tools for PoT deduction and addressing challenges in data quality and standardization.

Main Results:

  • Progress in developing bioinformatics tools for PoT deduction.
  • Addressing challenges in cell system quality, omics technologies, and bioinformatics standardization.
  • Developing concepts for annotating, validating, and sharing PoT information and linking them to adverse outcomes.

Conclusions:

  • The Human Toxome Knowledge-base has the potential to become a central reference for toxicological research.
  • Standardization and data sharing are crucial for advancing toxicological understanding and regulatory science.