Seiji Wada
Osaka Dental University
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Featured researches published by Seiji Wada.
Advances in Dental Research | 1988
Kenichi Uobe; Seiji Wada; Masahiro Wato; Tetsunari Nishikawa; Akio Tanaka; Ken Nishida; Masahiro Tsutsui
The aim of this study was to produce and characterize monoclonal antibodies against human gingival epithelial cells and gingival fibroblasts. By using these whole cells as immunogens, we were able to generate a large number of monoclonal antibodies reacting with tissue antigens, in particular antibodies that reacted with desmosomes (MoAbs 7 and 8) and basement membrane (MoAb FB-1) antigens. MoAbs 7 and 8 produced from epithelial cells stained cell membranes of epithelium and desmosomes, respectively, as shown by light and immunoelectron microscopy. The epitopes to which MoAbs 7 and 8 were reactive were stable against various treatments; only periodate oxidation abolished the tissue reactions with MoAb 8. Extraction of gingiva with SDS or NP-40, SDS-PAGE analysis, and Western blotting showed that the MoAb 8 identified an antigen with a molecular weight of 100,000 daltons. MoAb FB-1 produced from fibroblasts immunolabeled the basement membranes. The FB-1 antigen was clearly different from any of the known ubiquitous basement membrane components, such as type IV collagen, laminin, and fibronectin. Examination of the distribution and localization of the antigen showed that it was present in the basement membrane beneath stratified squamous epithelium. FB-1 did not react with any of types I-VI collagens in ELISA, but immunoelectron microscopy showed that the antigen reacting with FB-1 was present in the lamina fibroreticularis of the basement membrane and was comprised of collagen-like fibers. These results suggest the possible existence of a new collagen other than types I-VI in the basement membrane beneath stratified squamous epithelium.
Journal of the Japanese Society of Periodontology | 1988
Ken Nishida; Kenichi Uobe; Tetsunari Nishikawa; Masahiro Wato; Seiji Wada; Akio Tanaka; Masahiro Tsutsui; Masatoshi Ueda; Akira Yamaoka
辺縁性歯周炎の発症と経過に免疫現象が関与することが明らかにされている。その経過にみられる免疫現象は, 口腔内細菌による遷延感作あるいはより複雑な機序に基づくかもしれない。著者らはヒトロ腔内細菌を用いてモルモットを遷延感作したところ, 特異抗体産生は, 3ヵ月後に最高に達し, それ以降は漸時減少した。また, 辺縁性歯周炎罹患者血清中のヒトロ腔内細菌に対する特異抗体と免疫グロブリン (IgG) 含有量, さらに自己歯肉組織に対する特異抗体が存在するかどうかを健常者血清中のそれらと比較して検索した結果, 細菌特異抗体量は平均値では増加の傾向を示すが, 極端な最高ならびに最低値の症例を除くと減少の傾向を, しかし免疫グロブリン (IgG) 含有量は増加を示した。そして歯肉組織に対する特異抗体は全ての症例において検出されなかった。これらのことから, 本疾患の経過中に動物実験でみられたような遷延感作成立の可能性は否定的であった。
Nihon Shishubyo Gakkai Kaishi (journal of The Japanese Society of Periodontology) | 1987
Seiji Wada; Toshiyuki Tanaka; Koji Yoshida; Hajime Torada; Kenichi Uobe; Akio Tanaka; Masahiro Tsutsui
イヌ歯肉上皮細胞の細胞膜の微細構造を解明する一助として, 細胞膜に対するモノクロ抗体D1の対応抗原の局在性を免疫電顕を応用して観察した。間接免疫ペルオキシダーゼ法の結果, 凍結切片上では棘細胞の細胞膜に強い反応陽性所見が認められたが, 基底細胞の基底膜側および角質細胞の細胞膜は反応が陰性であった。高倍率の観察ではdesmosomeのattachment plaqueとそれに続く形質膜に反応陽性所見が認められ, 細胞質内小器官には反応産物は認められなかった。また酵素処理により遊離細胞とした場合も同様な結果となったことからモノクロ抗体D1の対応抗原は細胞膜表面を構成している物質であり, 歯肉上皮細胞の細胞膜は分化する際にその構成に変化が起こることが示唆される。
Journal of Oral Pathology & Medicine | 1994
Tetsunari Nishikawa; Seiji Wada; Masahiro Wato; Jun Tsutsui; Yasunori Nishimura; Kayo Matsuoka; Hakuro Okano; Akio Tanaka
Journal of Osaka Dental University | 1994
Jun Tsutsui; Seiji Wada
Journal of the Japanese Association of Periodontology | 1993
Seiji Wada; Jun Tsutsui; Yasunori Nishimura; Mitsuru Dan; Akio Tanaka
Journal of Osaka Dental University | 1991
Akio Tanaka; Seiji Wada; Kenichi Uobe; Shinsaku Hori; Mitsuru Dan; Junji Tanaka
Shika Kiso Igakkai zasshi = Japanese journal of oral biology | 1989
Tetsunari Nishikawa; Seiji Wada; Masahiro Wato; Kenichi Uobe; Ken Nishida; Akio Tanaka
歯科基礎医学会雑誌 | 1988
Akio Tanaka; Seiji Wada; Masahiro Wato; Tetsunari Nishikawa; Masahiro Tsutsui
歯科基礎医学会雑誌 | 1988
Akio Tanaka; Seiji Wada; Masahiro Wato; Tetsunari Nishikawa; Masahiro Tsutsui