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Tissue distribution of lysozyme in man
Summary
Lysozyme (LZM) is present in various human secretory cells and immune cells, including those in glands, intestines, liver, and placenta. This widespread distribution suggests a significant role in innate immunity and tissue defense.
Area of Science:
- Immunology
- Histology
- Biochemistry
Background:
- Lysozyme (LZM) is an enzyme with known antibacterial properties.
- Its precise distribution and potential roles in normal human tissues require detailed investigation.
Purpose of the Study:
- To map the distribution of lysozyme (LZM) in various normal human tissues.
- To correlate LZM distribution with its potential physiological functions, particularly its antimicrobial activity.
Main Methods:
- Immunohistochemistry utilizing the immunoglobulin-enzyme (peroxidase) bridge method.
- Microscopic examination of tissue sections to identify LZM presence.
Main Results:
- LZM was detected in secretory cells of lacrimal, salivary, esophageal, bronchial, gastric, and duodenal glands.
- It was also found in Paneth cells, Kupffer cells, renal proximal tubular cells, and immune cells in the placenta, lung, intestine, lymph nodes, and spleen.
Conclusions:
- Lysozyme (LZM) exhibits a broad distribution across diverse human secretory and immune cells.
- The widespread presence of LZM supports its crucial role in the innate immune system and host defense mechanisms.