Normal neuronal features of the human gallbladder and structural changes in cholelithiasis patients

Area of Science:

• Histology
• Gastroenterology
• Neuroscience

Background:

• Gallbladder function is influenced by neural innervation.
• Cholelithiasis (gallstones) may be associated with alterations in gallbladder physiology.
• Understanding nerve cell distribution is crucial for diagnosing gallbladder disorders.

Purpose of the Study:

• To compare the histological distribution of nerve cells in the gallbladder wall of normal subjects versus patients with cholelithiasis.
• To investigate potential correlations between nerve cell density and the presence of gallstones.

Main Methods:

• Histological examination of gallbladder tissue samples from ten subjects (five normal, five with cholelithiasis).
• Quantification of nerve cell density (cells per mm²) in the neck, body, and fundus regions of the gallbladder wall.

Main Results:

• Normal gallbladders exhibited a higher density of nerve cells in the neck region (23.45 ± 10.14/mm²) compared to the body (7.70 ± 8.45/mm²) and fundus (5.60 ± 3.66/mm²).
• Gallbladders with cholelithiasis showed a significantly lower nerve cell density across all regions, with the highest concentration in the neck (5.83 ± 4.92/mm²) and lowest in the fundus (1.03 ± 0.71/mm²).

Conclusions:

• A distinct pattern of nerve cell distribution exists in the normal gallbladder, with a concentration in the neck.
• Cholelithiasis is associated with a marked reduction in gallbladder nerve cell density, particularly in the body and fundus.
• These findings suggest a potential role for altered neural regulation in the pathophysiology of gallstone formation.