| Summary: | Cysteinproteaset cathepsin B har en trolig roll i vävnadsnedbrytningen vid kronisk parodontit då det visats kunna bryta ner extracellulära komponenter. Cystatin C är en fysiologisk inhibitor av cathepsin B och båda har kopplats till parodontal sjukdom. Syftet med studien var att undersöka närvaro av samt lokalisera cathepsin B och cystatin C i gingivala biopsier från patienter med kronisk parodontit. Närvaro och lokalisation av cathepsin Bs och cystatin Cs demonstrerades genom immunohistokemisk metod av kryostatsnittad vävnad. Polyklonal kanin anti-human primär antikropp för både enzym och inhibitor användes. För identifiering av primära antikroppar användes Dako REAL™ EnVision™ Detection System. Granskning skedde i ljusmikroskop. Studien visar på en närvaro av både enzym och inhibitor i epitel och bindväv i parodontalt sjuk vävnad. Cathepsin B lokaliserades i stor utsträckning till bindväven, främst perivaskulärt. I epitelet lokaliserades endast ett fåtal infärgade celler. Cystatin C hade i bindväven en diffus utbredning vilket gjorde lokalisation till specifika cellpopulationer svår. I epitelet sågs en tydlig infärgning kring/i celler med dendritiskt utseende. Dessa celler identifierades som sannolika langerhanska celler. === The cysteine protease cathepsin B has been shown to have a possible role in tissue destruction in chronic periodontitis, as it has been shown to degrade extracellular components. Cystatin C is a physiological inhibitor of cathepsin B and both are associated with periodontal disease. The aim with this study was to investigate the presence and localization of cathepsin B and cystatin C in gingival biopsies from patients with chronic periodontitis. Cathepsin B's and cystatin C’s presence and localization was demonstrated by immunohistochemical method of cryostat sectioned tissue from patients with chronic periodontitis. Polyclonal rabbit anti-human primary antibody for both the enzyme and the inhibitor were used. Identification of the primary antibodies were confirmed with Dako REAL ™ EnVision ™ Detection System. The sectioned tissue was analysed by using light microscopy. Our study indicates a presence of both enzyme and inhibitor in epithelial and connective tissue from patients with periodontal disease. Cathepsin B was localized mainly to the connective tissue, primarily to the perivascular space. In the epithelium only a few stained cells were identified. In the connective tissue, cystatin C had a diffuse distribution. Therefor it was difficult to distinguish the specific cell populations associated with the inhibitor. The epithelium showed a clear staining around/in dendritic cells. These cells were identified as probable Langerhans cells.
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