Endoneurial pressure in hexachlorophene neuropathy

Area of Science:

• Neuroscience
• Toxicology
• Pathology

Background:

• Hexachlorophene is a known neurotoxin.
• Elevated endoneurial pressure is implicated in peripheral nerve dysfunction.

Purpose of the Study:

• To investigate the relationship between hexachlorophene exposure, endoneurial pressure, and peripheral nerve damage in rats.
• To determine if reducing hexachlorophene exposure can reverse these effects.

Main Methods:

• Rats were fed hexachlorophene, and endoneurial pressure was measured using a micropressure transducer.
• Morphological analysis of sciatic nerves was performed using teased nerve fibers and electron microscopy.
• Recovery was assessed after returning rats to a normal diet.

Main Results:

• Hexachlorophene exposure increased endoneurial pressure up to 17.0 cm H2O.
• Morphological findings included severe intramyelinic edema and axonal degeneration.
• Endoneurial pressure and nerve damage largely reversed after 12 days on a normal diet.
• Prolonged exposure (4 weeks) led to widespread axonal degeneration and interstitial edema.

Conclusions:

• Increased endoneurial pressure is a significant factor in hexachlorophene-induced peripheral neuropathy.
• Reversibility of hexachlorophene neuropathy is possible with cessation of exposure.
• Axonal degeneration in hexachlorophene neuropathy may be a consequence of elevated endoneurial pressure.