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Journal of Dental Research
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Biological

Expression of Adrenomedullin and its Receptors in Human Salivary Tissue

S. Kapas1, K. Pahal1, A.T. Cruchley1, E. Hagi-Pavli1 and J.P. Hinson2,*

1 Molecular Signalling Group, Clinical Sciences Research Centre, and
2 Department of Endocrinology, Barts & the London, Queen Mary’s School of Medicine & Dentistry, Suite 12, Dominion House, Bartholomew Close, London EC1A 7BE, UK;

Correspondence: * corresponding author, j.p.hinson{at}qmul.ac.uk

Adrenomedullin is a multifunctional peptide produced by a wide range of different cells and tissues. This study was designed to investigate whether adrenomedullin is present in human saliva and in salivary glands. It was expected that saliva may contain high concentrations of adrenomedullin, which has antimicrobial activity in vitro, which may have functional implications in the oral cavity. Saliva from the submandibular and parotid glands contained higher concentrations of adrenomedullin than did the circulation, but lower concentrations than in whole saliva. This suggests that oral epithelium may contribute the majority of the adrenomedullin peptide found in saliva. Specific adrenomedullin receptors were found in cell lines from the submandibular (HSG) and parotid (HSY) salivary glands. These findings suggest a paracrine/autocrine role for adrenomedullin in these tissues; however, the concentration of adrenomedullin in saliva was insufficient to suggest a significant antimicrobial action in the healthy oral cavity.

Key Words: adrenomedullin • saliva • salivary gland • oral mucosa

Journal of Dental Research, Vol. 83, No. 4, 333-337 (2004)
DOI: 10.1177/154405910408300412
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