Ultrastructural morphometric features of human sural nerve endoneurial microvessels

Area of Science:

• Nerve ultrastructure
• Human microvascular morphology

Background:

• Endoneurial microvessels are critical for nerve health.
• Understanding their normal structure is essential for diagnosing neuropathy.

Purpose of the Study:

• To characterize the ultrastructural features of human endoneurial microvessels.
• To establish age-related reference values for these microvessels.
• To provide a baseline for studying microvessel pathology in disease.

Main Methods:

• Analysis of 366 transversely sectioned endoneurial microvessels from 50 healthy volunteers.
• Sural nerves processed using standardized techniques for neuropathy studies.
• Morphometric analysis of endothelial area, basement membrane area, nuclei count, and junctions.

Main Results:

• Endothelial area, basement membrane area, endothelial nuclei, and junctions increase with vessel size.
• Periendothelial cell coverage does not correlate with vessel size.
• Microvessel components, including basement membrane area, show no significant age-related changes.

Conclusions:

• Vessel size is a key determinant of endoneurial microvessel ultrastructure in humans.
• Age does not significantly alter key microvessel components.
• This study provides essential reference data for pathological investigations of nerve microvessels.