title: Production of monoclonal antibody inhibiting dipeptidylaminopeptidase IV activity of Porphyromonas gingivalis.
abstract: Porphyromonas gingivalis is a Gram-negative anaerobic bacterial species implicated as an important pathogen in the development of adult periodontitis. We previously cloned a gene encoding dipeptydilaminopeptidase IV (DAPIV) from P. gingivalis. In the present study, for immunological diagnosis and development of passive immunization, we produced a mouse monoclonal antibody (MAb) capable of inhibiting the DAPIV activity of P. gingivalis using highly purified recombinant DAPIV as an immunogen. The constructed MAb, designated as MAb-Pg-DAP-1, significantly inhibited DAPIV activity in P. gingivalis, as well as slightly inhibited that in other gram-negative bacteria such as Porphyromonas endodontalis and Prevotella loesheii, whereas no inhibition was seen in the gram-positive bacteria Streptococcus mutans and Actinomyces viscosus. Furthermore, the MAb did not inhibit DAPIV enzyme activity in human serum. This novel MAb may be useful for the development of immunological diagnosis capability and in passive immunization.
authors.affiliation: Department of Conservative Dentistry, Nihon University School of Dentistry at Matsudo, Matsudo, Chiba 271-8587, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Teshirogi
authors.forename: M
authors.initials: M
authors.lastname: Hayakawa
authors.forename: T
authors.initials: T
authors.lastname: Ikemi
authors.forename: Y
authors.initials: Y
authors.lastname: Abiko
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D000911:Antibodies, Monoclonal / Q000737:chemistry* / Q000378:metabolism; D015153:Blotting, Western; D018819:Dipeptidyl Peptidase 4 / Q000737:chemistry*; D004306:Dose-Response Relationship, Immunologic; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D006090:Gram-Negative Bacteria / Q000378:metabolism; D015151:Immunoblotting; D051379:Mice; D008807:Mice, Inbred BALB C; D008969:Molecular Sequence Data; D016966:Porphyromonas gingivalis / Q000201:enzymology*; D011480:Protease Inhibitors / Q000494:pharmacology; D011994:Recombinant Proteins / Q000737:chemistry; D017386:Sequence Homology, Amino Acid
chemical_list: D000911:Antibodies, Monoclonal; D011480:Protease Inhibitors; D011994:Recombinant Proteins; D018819:Dipeptidyl Peptidase 4