Related Experiment Video

Updated: Aug 14, 2026

Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease
08:09

Gene-environment Interaction Models to Unmask Susceptibility Mechanisms in Parkinson's Disease

Published on: January 7, 2014

Neuropathology of trimethyltin: a proposed pathogenetic mechanism

L W Chang

    Fundamental and Applied Toxicology : Official Journal of the Society of Toxicology
    |February 1, 1986
    PubMed

    Insights

    Trimethyltin (TMT) causes inverse pathological patterns in the limbic system, affecting granule cells and Ammon's horn neurons. This suggests a hyperexcitory cascade model for TMT-induced neurotoxicity.

    Area of Science:

    • Neuroscience
    • Toxicology
    • Cellular Biology

    Background:

    • Trimethyltin (TMT) is a neurotoxicant known to induce pathological changes in the limbic system.
    • Understanding the specific patterns of neuronal damage is crucial for elucidating TMT's mechanism of action.

    Purpose of the Study:

    • To review and compare the pathological changes induced by TMT in the limbic system of mice and rats.
    • To investigate the relationship between damage in different neuronal populations within the limbic system.
    • To propose a working hypothesis explaining TMT-induced neurotoxicity.

    Main Methods:

    • Comparative review of pathological findings in mouse, rat, and neonatal rat models exposed to TMT.
    • Analysis of pathological patterns along the septotemporal axis of the brain.
    • Examination of neuronal relationships between the entorhinal cortex, fascia dentata, and Ammon's horn.

    Main Results:

    • An inverse pathological relationship was observed between fascia dentata granule cells and Ammon's horn CA3 pyramidal neurons.
    • This inverse pattern was consistent across adult and neonatal nervous systems and along the septotemporal axis.
    • Functional integrity of granule cells appears necessary for Ammon's horn pathology.

    Conclusions:

    • A "hyperexcitory" and "hyperstimulatory" neuronal damage hypothesis is proposed.
    • A theory of a hyperexcitory cascade involving entorhinal cortex, fascia dentata, CA3, and CA1,2 neurons is constructed.
    • This cascade model offers a framework for understanding diverse TMT-induced pathological lesions.

    More Related Videos

    Microglia as a Surrogate Biosensor to Determine Nanoparticle Neurotoxicity08:37

    Microglia as a Surrogate Biosensor to Determine Nanoparticle Neurotoxicity

    Published on: October 25, 2016

    Label-Free Non-Linear Optics for the Study of Tubulin-Dependent Defects in Central Myelin08:07

    Label-Free Non-Linear Optics for the Study of Tubulin-Dependent Defects in Central Myelin

    Published on: March 24, 2023

    Related Concept Videos

    Gut-Brain Axis01:22

    Gut-Brain Axis

    The gut–brain axis is a bidirectional communication system that connects the gastrointestinal tract and the brain. This interaction is mediated through multiple pathways, including the vagus nerve, hormonal signals, immune responses, and chemical messengers produced by gut microbes.Microbial Contributions to Brain FunctionGut microbiota contributes significantly to brain function by producing neuroactive compounds. These include neuroactive compounds that influence neurotransmitters such as...
    Parkinson Disease ll: Pathophysiology01:24

    Parkinson Disease ll: Pathophysiology

    Parkinson disease (PD) is a progressive neurodegenerative disorder primarily affecting movement, with additional non-motor features. Its pathophysiology involves complex interactions among genetic susceptibility, environmental exposures, and cellular dysfunction, including dopaminergic neuron loss, protein aggregation, and mitochondrial impairment.Selective NeurodegenerationA key feature is the degeneration of dopaminergic neurons in the substantia nigra pars compacta, leading to reduced...
    Antiprotozoal Agents01:21

    Antiprotozoal Agents

    Leishmaniasis is a widespread parasitic disease caused by several Leishmania species. It affects millions of people each year and remains a major public health problem in endemic regions. First-line treatment relies on pentavalent antimonials, including meglumine antimoniate and sodium stibogluconate. Even so, how these drugs work has not been fully clear, especially their interaction with parasite-specific biochemical pathways. One key target is trypanothione reductase (TR), an enzyme that...