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Related Concept Videos

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,...
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...
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...
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...
Toxicokinetics: Overview01:21

Toxicokinetics: Overview

Studies that assess how a drug is absorbed, distributed, metabolized, and excreted (ADME) at toxic doses are termed toxicokinetics. Understanding toxicokinetics helps predict adverse drug reactions (ADRs) and manage toxicity in humans.Toxicokinetics differs from pharmacokinetics mainly in the dose levels studied, with toxicokinetics focusing on higher toxic doses. The kinetics at these levels can be non-linear due to altered physiological processes. Toxicodynamics examines the relationship...
Kendall's Tau Test01:16

Kendall's Tau Test

Kendall's tau test, also known as the Kendall rank coefficient test, is a nonparametric method for assessing association between two variables. This test is particularly useful for identifying significant correlations when the distributions of the sample and population are unknown. Developed in 1938 by the British statistician Sir Maurice George Kendall, the tau coefficient (denoted as τ) serves as a rank correlation coefficient, with values ranging from -1 to +1.
A τ value of +1 indicates that...

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Related Experiment Video

Updated: May 10, 2026

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein
09:22

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein

Published on: January 2, 2015

What Renders TAU Toxic.

Jürgen Götz1, Di Xia, Gerhard Leinenga

  • 1Centre for Ageing Dementia Research, Queensland Brain Institute, The University of Queensland , Brisbane, QLD , Australia ; Sydney Medical School, Brain and Mind Research Institute, University of Sydney , Sydney, NSW , Australia.

Frontiers in Neurology
|June 18, 2013
PubMed
Summary
This summary is machine-generated.

Tau protein aggregation is linked to Alzheimer's disease (AD). Research shows tau causes neuronal damage before forming tangles, suggesting reduced tau levels may mitigate toxicity.

Keywords:
Alzheimer’s diseaseC. elegansPP2APTL-1TAUfrontotemporal dementiaknock-outtransgenic

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Cell-based Assay to Study Antibody-mediated Tau Clearance by Microglia
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Cell-based Assay to Study Antibody-mediated Tau Clearance by Microglia

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Modulation of Tau Subcellular Localization as a Tool to Investigate the Expression of Disease-related Genes
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Modulation of Tau Subcellular Localization as a Tool to Investigate the Expression of Disease-related Genes

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Related Experiment Videos

Last Updated: May 10, 2026

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein
09:22

In Vitro Aggregation Assays Using Hyperphosphorylated Tau Protein

Published on: January 2, 2015

Cell-based Assay to Study Antibody-mediated Tau Clearance by Microglia
07:18

Cell-based Assay to Study Antibody-mediated Tau Clearance by Microglia

Published on: November 9, 2018

Modulation of Tau Subcellular Localization as a Tool to Investigate the Expression of Disease-related Genes
09:12

Modulation of Tau Subcellular Localization as a Tool to Investigate the Expression of Disease-related Genes

Published on: December 20, 2019

Area of Science:

  • Neuroscience
  • Cell Biology
  • Molecular Biology

Background:

  • Tau is a microtubule-associated protein implicated in Alzheimer's disease (AD).
  • Pathological conditions involve tau forming insoluble, filamentous aggregates like neurofibrillary tangles.
  • Early tau pathology and its mechanisms remain incompletely understood.

Purpose of the Study:

  • To review the evolving understanding of tau toxicity beyond aggregate formation.
  • To explore how increased tau levels and altered localization contribute to cellular dysfunction.
  • To discuss the implications of tau phosphorylation and mitochondrial impairment.

Main Methods:

  • Review of existing literature on tau transgenic mouse models and knock-out studies.
  • Analysis of tau's non-axonal localization and its interaction with cellular proteins.
  • Examination of tau's role in mitochondrial dysfunction and the impact of phosphorylation.

Main Results:

  • Tau causes cellular damage prior to the formation of neurofibrillary tangles.
  • Altered tau levels and subcellular localization lead to aberrant protein interactions and impaired functions.
  • Tau phosphorylation and mitochondrial impairment are key mechanisms of tau toxicity.

Conclusions:

  • Tau toxicity is complex and precedes aggregate formation.
  • Reducing tau levels, rather than complete abolition, may be a viable strategy to mitigate neurotoxicity in conditions like AD.
  • Further research into specific toxic tau species and their contexts is warranted.