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[Cathepsin D activity in chronic rhinosinusitis with nasal polyps]
Magdalena Chlabicz1, Andrzej Sieśkiewicz, Małgorzata Rózańska-Kudelska
1Klinika Otolaryngologii, Uniwersytetu Medycznego w Białymstoku. magda@szczytno.com.pl
Otolaryngologia Polska = the Polish Otolaryngology
|December 21, 2010
Summary
Cathepsin D activity is elevated in nasal polyps and inflamed nasal tissues, suggesting its significant role in the inflammatory processes underlying nasal polyposis. Further research into proteolytic enzymes is needed to differentiate between inflamed and polypoid tissues.
Area of Science:
- Biochemistry
- Pathology
- Otorhinolaryngology
Context:
- Nasal polyposis affects 1-4% of the population, characterized by inflamed mucous membranes.
- The exact mechanisms driving nasal polyp development remain unclear.
- Inflammatory processes are widely believed to initiate polyp formation by damaging the epithelium and basal membrane.
Purpose:
- To investigate the role of Cathepsin D in the pathogenesis of nasal polyps.
- To compare Cathepsin D activity in nasal polyp tissue, inflamed nasal mucosa, and healthy nasal septum.
Summary:
- Cathepsin D activity was measured in tissues from 39 patients undergoing surgery for chronic rhinosinusitis with polyps.
- Spectrophotometric methods with pepstatin inhibition were used.
- Significantly higher Cathepsin D activity was found in polypoid tissue and inflamed mucosa compared to nasal septum tissue.
Impact:
- Elevated Cathepsin D activity in nasal polyps and inflamed mucosa supports its involvement in inflammatory damage and tissue remodeling.
- Further studies on other proteolytic enzymes are recommended to distinguish between inflamed and polypoid tissues.
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