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Identification of in vivo Pellicle Constituents by Analysis of Serum Immune Responses

¹ Department of Periodontology and Oral Biology, Boston University Goldman School of Dental Medicine, 700 Albany Street, Boston, MA 02118, USA; and
² Department of Biochemistry, Boston University School of Medicine, 715 Albany Street, Boston, MA 02118, USA;

^* corresponding author, fropp{at}bu.edu

Human acquired enamel pellicle is composed of molecules that selectively adsorb from saliva onto tooth surfaces and provides a protective interface between the tooth enamel and the oral environment. To identify the micro-amounts of components present in pellicle, we immunized mice with in vivo-formed human acquired enamel pellicle and analyzed the serum immune responses. Selective reactivities of the serum (OD > 1.0 above background) against albumin, amylase, carbonic anhydrase II, sIgA, IgG, IgM, lactoferrin, lysozyme, proline-rich proteins, statherin, histatin 1, and mucous glycoprotein 1 were observed. We further confirmed the presence of proline-rich proteins, lactoferrin, lysozyme, and carbonic anhydrase II by probing in vivo pellicle with specific polyclonal anti-sera. The polyclonal antibody approach provided a powerful method for the identification of various pellicle proteins, including some which show mineral homeostasis or antimicrobial activity.

KEY WORDS: in vivo pellicle • serum • immune response • composition • proteins

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