Perisinusoidal cells in patients with normal liver histology. A morphometric study

Area of Science:

• Hepatology
• Cell Biology
• Liver Histology

Background:

• Perisinusoidal cells (PSCs), also known as hepatic stellate cells, play crucial roles in liver function and disease.
• Understanding the normal characteristics of PSCs is essential for interpreting pathological changes.

Purpose of the Study:

• To quantify the number and morphometric features of PSCs in normal human liver tissue.
• To assess the lipid content and distribution within PSCs.

Main Methods:

• Analysis of perfusion-fixed liver biopsy samples from 7 healthy control patients.
• Morphometric analysis using 1-micron and ultrathin sections.
• Quantification of cell number, volume density, and lipid content.

Main Results:

• PSCs numbered 18 +/- 1.5/0.1 mm2, representing 1% of hepatic parenchyma volume.
• Lipid droplets were present in 75% of PSCs, with a lipid volume density of 20.5 +/- 7.3% per nucleated cell.
• Over 30% of PSCs contained less than 10% lipids; no zonal differences were observed.

Conclusions:

• PSCs are a significant cellular component of normal liver parenchyma.
• A substantial proportion of PSCs contain varying amounts of lipids, irrespective of liver zonation.
• These findings provide a baseline for PSC characterization in liver research.