This Article
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrowReprints and Permissions
Right arrow Copyright Information
Right arrow Books from ASM Press
Right arrow MicrobeWorld
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Nemoto, E.
Right arrow Articles by Horiuch, H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Nemoto, E.
Right arrow Articles by Horiuch, H.

Next Article 

Infection and Immunity, December 1999, p. 6225-6233, Vol. 67, No. 12
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Increase of CD26/Dipeptidyl Peptidase IV Expression on Human Gingival Fibroblasts upon Stimulation with Cytokines and Bacterial Components

Eiji Nemoto,1,* Shunji Sugawara,2 Haruhiko Takada,2 Shigeru Shoji,1 and Hiroshi Horiuch1

Department of Endodontics and Periodontics1 and Department of Microbiology and Immunology,2 Tohoku University School of Dentistry, Sendai, 980-8575, Japan

Received 11 March 1999/Returned for modification 18 May 1999/Accepted 1 September 1999

CD26/dipeptidyl peptidase IV (DPPIV) is a cell surface ectoenzyme which participates in immune and inflammatory reactions. We found that CD26 was only partially expressed on human fibroblasts from periodontal tissues, whereas fibroblasts from lung and skin expressed CD26 constitutively as revealed by flow cytometry. We examined the possible upregulation of CD26 expression on human gingival fibroblasts in response to various stimulants. Interleukin-1alpha (IL-1alpha ); tumor necrosis factor alpha; gamma interferon; lipopolysaccharide from Porphyromonas gingivalis, Prevotella intermedia, and Escherichia coli; and Prevotella glycoprotein augmented CD26 expression on gingival fibroblasts. Among the stimulants, IL-1alpha exhibited the most potent activity. Enzymatic activity of CD26 induced by IL-1alpha on fibroblasts was determined colorimetrically in terms of Gly-Pro hydrolysis of a synthetic chromogenic substrate, Gly-Pro p-nitroanilide. Among various inhibitors tested, diprotin A and phenylmethylsulfonyl fluoride inhibited the enzymatic activity, suggesting that the enzyme induced by IL-1alpha was DPPIV. The upregulation of CD26 mRNA expression upon stimulation with IL-1alpha was also revealed by a quantitative reverse transcription-PCR assay. In the kinetic experiment, 48 h and several days were required for maximum CD26 mRNA accumulation and CD26 molecule expression on the cell surface, respectively. The addition of cycloheximide at 2 h before IL-1alpha stimulation almost completely inhibited the accumulation of CD26 mRNA. These results suggested that induction of CD26 on human gingival fibroblasts is regulated at the transcriptional level and is also dependent on a de novo-synthesized protein factor(s).

* Corresponding author. Mailing address: Department of Endodontics and Periodontics, Tohoku University School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai, 980-8575, Japan. Phone: 81-22-717-8336. Fax: 81-22-717-8339. E-mail: eiji{at}mail.cc.tohoku.ac.jp.

Infection and Immunity, December 1999, p. 6225-6233, Vol. 67, No. 12
0019-9567/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


This article has been cited by other articles:

  • Kehlen, A., Lendeckel, U., Dralle, H., Langner, J., Hoang-Vu, C. (2003). Biological Significance of Aminopeptidase N/CD13 in Thyroid Carcinomas. Cancer Res. 63: 8500-8506 [Abstract] [Full Text]  
  • Kajiyama, H., Kikkawa, F., Khin, E., Shibata, K., Ino, K., Mizutani, S. (2003). Dipeptidyl Peptidase IV Overexpression Induces Up-Regulation of E-Cadherin and Tissue Inhibitors of Matrix Metalloproteinases, Resulting in Decreased Invasive Potential in Ovarian Carcinoma Cells. Cancer Res. 63: 2278-2283 [Abstract] [Full Text]  
  • Nemoto, E., Tada, H., Shimauchi, H. (2002). Disruption of CD40/CD40 ligand interaction with cleavage of CD40 on human gingival fibroblasts by human leukocyte elastase resulting in down-regulation of chemokine production. J. Leukoc. Biol. 72: 538-545 [Abstract] [Full Text]  
  • Kajiyama, H., Kikkawa, F., Suzuki, T., Shibata, K., Ino, K., Mizutani, S. (2002). Prolonged Survival and Decreased Invasive Activity Attributable to Dipeptidyl Peptidase IV Overexpression in Ovarian Carcinoma. Cancer Res. 62: 2753-2757 [Abstract] [Full Text]  
  • Nemoto, E., Sugawara, S., Tada, H., Takada, H., Shimauchi, H., Horiuchi, H. (2000). Cleavage of CD14 on Human Gingival Fibroblasts Cocultured with Activated Neutrophils Is Mediated by Human Leukocyte Elastase Resulting in Down-Regulation of Lipopolysaccharide-Induced IL-8 Production. J. Immunol. 165: 5807-5813 [Abstract] [Full Text]  


Copyright © 2009 by the American Society for Microbiology.   For an alternate route to Journals.ASM.org, visit: http://intl-journals.asm.org | More Info»