Rat Brain Developmental Neurotoxicity from Maternal Thyroid-Disrupting Chemical Exposure

Maternal exposure to the herbicide amitrole induced fetal and postnatal hypothyroidism and a specific brain malformation in rat offspring. This 32.1 KB dataset documents the thyroidal and neurotoxic effects of two thyroperoxidase-inhibiting compounds tested on pregnant and lactating rats. The research by Louise Ramhøj, shared under CC-BY-4.0 on figshare, reinforces concerns over environmental chemicals impacting vertebrate brain development.

Use Cases

• Modeling dose-response relationships for thyroid-disrupting chemicals based on serum and brain hormone concentration data.
• Investigating links between hypothyroidism and specific brain malformations like periventricular heterotopia.
• Comparing neurotoxic effects of pharmaceutical (methimazole) versus environmental (amitrole) thyroid synthesis inhibitors.
• Supporting the development of improved toxicological testing methods for thyroid system-disrupting chemicals.

Strengths

• Data originates from a controlled animal study with specific dosage levels (8, 16, 25, 50 mg/kg/day) and exposure windows (gestation day 7 to postnatal day 16).
• The study measures multiple endpoints: serum TH concentrations, brain TH concentrations, and the presence of a specific brain malformation.
• Dataset is openly shared under a permissive CC-BY-4.0 license.

Limitations

• The dataset is very small (32.1 KB), indicating limited scope and likely a summary of results rather than raw experimental data.
• Column-level documentation is absent; field semantics must be inferred after download.
• Data may reflect bias inherent to the rat model and specific experimental conditions.

Provenance

Source

Louise Ramhøj

Collection Method

Experimental study on pregnant and lactating rat dams exposed to control, methimazole, or amitrole.

Freshness

Last updated 2026-05-12 04:19:08; freshness should be verified.