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- W2023180417 abstract "Background and objectives: Aminopeptidase N (APN)/CD13 is a multifunctional ectoenzyme that is involved in anti‐inflammatory reactions, control of immune reactions and differentiation of many cellular systems. Here, we hypothesized that CD13/APN would be expressed on human gingival fibroblasts (hGF) and would contribute to the regulation of immune responses in periodontal tissue. Methods and results: CD13/APN was expressed on hGF at the mRNA and protein levels as determined by reverse transcriptase–polymerase chain reaction (RT–PCR) and flow cytometry, respectively. Enzymatic activities accompanying the expression were assessed by colorimetrical analysis using the synthetic substrate Leu‐ p ‐nitroanilide. We examined the possible regulation of CD13/APN expression on hGF in response to T cell‐derived cytokines. T helper (Th) 2 cell type cytokines such as interleukin‐4 and interleukin‐13, but not interleukin‐2 or interleukin‐15, preferentially increased the expression of proteins as well as the enzymatic activities of CD13/APN in a dose‐dependent manner. Receptors for these cytokines, the interleukin‐4 receptor α chain, interleukin‐13 receptor α1 chain, and interleukin‐2R common γ chain, were expressed on hGF assessed by RT–PCR or flow cytometry. hGF exhibited inhibitory effects for formyl‐methionyl‐leucyl‐phenylalanine (FMLP)‐induced polymorphonuclear leukocyte‐activation that was evaluated by Mac‐1 expression, and this inhibitory effect was partially recovered by pre‐treatment with the APN‐specific inhibitor bestatin. Conclusions: These findings suggested that CD13/APN expressed by hGF could contribute to the anti‐inflammatory response in periodontal tissue, and may be involved in disease processes mediated by Th2 cells." @default.
- W2023180417 created "2016-06-24" @default.
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- W2023180417 date "2005-01-27" @default.
- W2023180417 modified "2023-10-16" @default.
- W2023180417 title "Expression of CD13/aminopeptidase N on human gingival fibroblasts and up-regulation upon stimulation with interleukin-4 and interleukin-13" @default.
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- W2023180417 doi "https://doi.org/10.1111/j.1600-0765.2004.00778.x" @default.
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