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Interleukin‐1α produced in human gingival fibroblasts induces several activities related to the progression of periodontitis by direct contact
Author(s) -
Okamatsu Y.,
Kobayashi M.,
Nishihara T.,
Hasegawa K.
Publication year - 1996
Publication title -
journal of periodontal research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.31
H-Index - 83
eISSN - 1600-0765
pISSN - 0022-3484
DOI - 10.1111/j.1600-0765.1996.tb00503.x
Subject(s) - calvaria , collagenase , periodontitis , chemistry , periodontal fiber , prostaglandin e2 , interstitial collagenase , microbiology and biotechnology , cell culture , monoclonal antibody , immunology , biology , antibody , medicine , endocrinology , in vitro , dentistry , biochemistry , enzyme , genetics
Previous observations suggest that interleukin‐1 (IL‐1) may play an important role in the progression of periodontitis. In the present study, we investigated whether a cell‐associated IL‐1α (CAIL‐lα) produced in human gingival fibroblasts (HGF) induces biological activities related to the progression of periodontitis. HGF were treated with recombinant human IL‐1β (rhIL‐1β) for 12 h. After that, the cell layers of HGF were washed 3 times with fresh medium and were then fixed with 1% paraformaldehyde. The fixed cell layers of HGF were used for assays for bone resorbing activity, prostaglandin E 2 (PGE 2 ) production and collagenase activity. Fixed cell layers of HGF treated with rhIL‐1β enhanced not only calcium release from BALB/c mouse calvaria but also PGE 2 production and collagenase activity in HGF and human periodontal ligament fibroblasts (HPLF) cultured on the fixed cell layers. These activities were neutralized by treatment with monoclonal mouse anti‐human IL‐1α antibody, but monoclonal mouse antihuman IL‐1β antibody showed no effects on these activities. The induction of these activities by fixed cell layers of HGF required direct contact between the fixed cell layers and the calvaria, HGF, or HPLF. These results suggest that CAIL‐1α produced in HGF treated with rhIL‐1β induces bone resorbing activity, PGE 2 production and collagenase activity in the target cells by direct contact; CAIL‐lα may play an important role in the progression of periodontitis.