Related Experiment Video
Updated: Jul 24, 2026

Evaluation of Vascular Control Mechanisms Utilizing Video Microscopy of Isolated Resistance Arteries of Rats
Published on: December 5, 2017
Lead-induced hypertension. III. Increased hydroxyl radical production
Y Ding1, H C Gonick, N D Vaziri
1Division of Nephrology and Hypertension, University of California, Irvine, USA.
This study suggests that lead-induced hypertension may involve reactive oxygen species, specifically hydroxyl radical or peroxynitrite. Dimethylthiourea, a scavenger, normalized blood pressure and oxidative stress markers in lead-treated rats.
Area of Science:
- Toxicology
- Cardiovascular Physiology
- Biochemistry
Background:
- Lead exposure is linked to hypertension.
- Increased reactive oxygen species (ROS) are associated with lead-induced hypertension.
- The specific ROS involved in this process requires further definition.
Purpose of the Study:
- To identify the specific reactive oxygen species responsible for lead-induced hypertension.
- To investigate the effects of a ROS scavenger on blood pressure and oxidative stress markers in lead-treated rats.
Main Methods:
- Rats were treated with low-level lead (100 ppm).
- Blood pressure, MDA-TBA (a marker of ROS), hydroxyl radical, and nitrotyrosine levels were measured.
- The effects of dimethylthiourea, a hydroxyl radical scavenger, were assessed.
Main Results:
- Dimethylthiourea normalized blood pressure and MDA-TBA in lead-treated rats.
- The scavenger reduced hydroxyl radical and nitrotyrosine levels toward normal.
- Dimethylthiourea had no effect on control animals, indicating specificity.
Conclusions:
- The findings support the role of hydroxyl radical or peroxynitrite in lead-induced hypertension.
- Targeting these specific ROS may offer a therapeutic strategy for lead toxicity.
More Related Videos
05:57The Antihypertensive Effects and Mechanisms of Huotan Jiedu Tongluo Decoction in Rats with H-Type Hypertension
Published on: May 17, 2024
05:16High Throughput Screening Assessment of Reactive Oxygen Species (ROS) Generation using Dihydroethidium (DHE) Fluorescence Dye
Published on: January 19, 2024
Related Concept Videos
Hypertension and Regulation of Blood Pressure
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
Antihypertensive Drugs: Direct Renin Inhibitors
Hypertension II: Pathophysiology
Hypertension III: Clinical Manifestations and Diagnostic Studies
Acute Inflammation III: Local and Systemic Effects