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Cystatins S and C in Human Whole Saliva and in Glandular Salivas in Periodontal Health and Disease

Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit, Van der Boechorststraat 7,1081 BT Amsterdam, The Netherlands

E.C.I. Veerman

Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit, Van der Boechorststraat 7,1081 BT Amsterdam, The Netherlands

M.S. Mantel

Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit, Van der Boechorststraat 7,1081 BT Amsterdam, The Netherlands

U. van der Velden

Department of Periodontology, Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit, Van der Boechorststraat 7,1081 BT Amsterdam, The Netherlands

A.V. Nieuw Amerongen

Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam (ACTA), Vrije Universiteit, Van der Boechorststraat 7,1081 BT Amsterdam, The Netherlands

Cystatins are inhibitors of cysteine proteinases and could play a protective and regulatory role under inflammatory conditions. Since total cystatin activity of whole saliva was increased in periodontal patients (Henskens et al., 1993), we wanted to investigate the types or origins of cystatins involved in this increase. Distinct types of cystatins were identified by isoelectric focusing and immunoblotting with specific antibodies against one of the salivary acidic isoforms, cystatin S, and the widely distributed basic cystatin C. Clarified human whole saliva (CHWS) of healthy subjects contained cystatin S, whereas cystatin C was barely detectable. In contrast, in CHWS of gingivitis and periodontitis patients, both cystatin C and S levels were higher. The origin of cystatin activity was investigated by collecting submandibular (SM), sublingual (SL), and parotid (PAR) saliva from seven subjects with mild gingivitis. Total cystatin activity was about five times higher in SM saliva than in PAR saliva. In SM and SL saliva, both cystatins S and C were demonstrated. In contrast, in PAR samples, solely cystatin C was detectable. The introduction of experimental gingivitis in one periodontally healthy subject resulted in the appearance of a cystatin C band in PAR saliva and in an increase of cystatins S and C in SM saliva. We conclude that the previously observed increase of cystatin activity in whole saliva in inflammatory periodontal disease is, at least in part, due to an increased glandular output of both the isof orm cystatin S (pI 4.7) and the basic cystatin C (pI 9.0).

Key Words: Cystatins • Saliva • Gingivitis • Periodontitis

Journal of Dental Research, Vol. 73, No. 10, 1606-1614 (1994)
DOI: 10.1177/00220345940730100501


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