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Featured researches published by Ryuzo Fueki.


Respiration | 1986

Effect of Nifedipine on Dose-Response Curves to Acetylcholine and Histamine Measured during Quiet Breathing

Shinichi Tomioka; Munehiro Arai; Hajime Kuroiwa; Ryuzo Fueki; Setsuo Kobayashi

We have investigated the effect of nifedipine on acetylcholine-induced bronchoconstriction in 8 asthmatics and on histamine-induced bronchoconstriction in another 8 asthmatics on a single-blind basis. Expiratory spirograms were done at the beginning of the examination in all subjects, and repeated after 10 mg of oral nifedipine or a placebo. The change of respiratory resistance during the inhalation of acetylcholine or histamine was recorded continuously by an Astograph. Using this device, we were able to obtain the direct-writing dose-response curve of respiratory resistance measured during quiet breathing. Resting airway tone appeared to be generally unaffected by nifedipine, as there was no significant change in baseline spirograms. Nifedipine increased significantly the threshold of bronchial responsiveness, i.e., the cumulative dose of acetylcholine (Dmin) at which the respiratory resistance started to increase, compared with placebo (p less than 0.02). However, Sd, the slope of the increasing rate of respiratory resistance in the dose-response curve, was not attenuated by nifedipine. In histamine inhalation tests, neither Dmin nor Sd were modified by nifedipine. The discrepancy observed between the effects of nifedipine on acetylcholine- and histamine-induced bronchoconstriction may imply that, in asthmatics, nifedipine exerts its effect mainly by stabilizing mast cells rather than by directly inhibiting bronchial smooth muscle contractility. This hypothesis is based on the fact that mast cells have acetylcholine receptors on their surfaces but no histamine H1-receptors.


Nihon Naika Gakkai Zasshi | 1980

A CASE OF WEIL'S DISEASE FOUND IN THE TONE-NUMATA DISTRICT OF GUNMA PREFECTURE

Kazumi Nagasaka; Masateru Tanaka; Nobuko Hirasawa; Shinichi Tomioka; Makoto Motoyama; Tatsuo Yamaji; Shoji Yamada; Ryuzo Fueki; Setsuo Kobayashi

症例は56才,男性.職業は旅館番頭.素足で魚釣,水田作業に従事後,高熱が出現,発熱,筋肉痛,下痢を主訴として入院.入院後,典型的な臨床経過をとり,顕微鏡的凝集反応でL. icterohaemorrhagiae 80倍陽性で, Wei1病と診断された. SM,抗血清療法などの他,腹膜潅流も併用したが,昏睡状態となり,呼吸困難で死亡した.剖検では,著明な黄疸と出血傾向が有り,直接死因は,肺実質内出血であつた.組織学的には,腎で尿細管上皮の変性と間質性腎炎が著明であつた.肝では肝細胞索解離,胆汁うつ滞,有糸分裂縁などが特徴的で, Areanらの記載と一致した.一方,最近7年間の本邦におけるレプトスピラ症の報告例は103例で,死亡例は14例,全てWeil病であつた. Weil病は69例で,うち比較的記載の十分な30例について,治療内容,治療開始病日を検討すると,死亡例12例,生存例18例とも全例SMが使用された.治療開始病日は,死亡例では,平均8.3日であつたが,生存例では,平均5.6日であつた.この数日の遅れが予後に重大な影響を与えていると思われ,自験例でも,こうした治療開始病日の遅れが致命的であつた. Weil病は,現在なお,全国各地で散発的な発生がみられ,急性熱性疾患の診断にあたつては,本症の存在を常に念頭に置く必要性が痛感させられた.


Journal of Asthma | 1987

Effect of Combined H-1 and H-2 Histamine Receptor Antagonists on Late Asthmatic Response in an Asthmatic Patient

Tsugio Nakazawa; Yoshio Umegae; Shigeru Matsui; Ryuzo Fueki; Setsuo Kobayashi

A curious inhibitory effect of histamine H-1 and H-2 antagonists on isolated late asthmatic response (LAR) in an asthmatic patient was observed. When given alone, neither the H-1 nor the H-2 antagonist had an effect on LAR. The combination of drugs, however, provided marked inhibition of LAR. These findings suggest that histamine contributes to some types of LAR.


Nihon Naika Gakkai Zasshi | 1980

A CASE OF HYPERSENSITIVITY PNEUMONITIS CAUSED BY CANDIDA ALBICANS

Kunio Dobashi; Tsugio Nakazawa; Toru Nagasawa; Yoshio Umegai; Masashi Inazawa; Shinichi Tomioka; Ryuzo Fueki; Setsuo Kobayashi

カンジダに起因すると考えられた過敏性肺炎の1症例を経験したので報告する.症例は25才,女性,教員で昭和47年より毎年5~9月に発熱,乾性咳嗽,食欲不振をくり返し来院した.血沈亢進,白血球増加, CRP(〓), γグロブリン上昇が認められた.肺機能では,拡散機能の低下(% DLco 59.0),胸部X線像では両側下肺野に細網状陰影がみられた.各種アレルゲンを用いた皮内反応では,カンジダと多価細菌ワクチン(ブロンカスマベルナ)にアルサス型,遅延型反応が陽性であつた.また, Ouchterlony法を用いたゲル内沈降反応ではカンジダのみに陽性で,他のM. faeniやT. vularisその他の真菌類では陰性であつた,以上より本例は典型的過敏性肺炎であり,かつその起因抗原としてカンジダが考えられたので,これを用いて吸入誘発試験を施行した.その結果,吸入終了数時間後に咳嗽,発熱,呼吸菌難等の症状が再現され,肺に湿性ラ音も聴取された.また白血球増加,血沈亢進CRPの陽性化(〓)→(〓), %VCの低下を認め,またA-aDO2の上昇も認められた.一方, FEV1.0%は前値に比し不変であつた.吸入3日後にtransbronchial法にて施行した肺生検の組織像では,間質の細胞性肥厚,肺胞内および間質に肉芽腫形成がみられた.アレルギー的発症機序については, III型アレルギーの可能性が示唆されたが,本例はいわゆる夏型過敏性肺炎のアレルゲンとして,カンジダをも考えるべき一つの示唆を与えていると思われる.


Nihon Naika Gakkai Zasshi | 1976

A CASE OF ALLERGIC ANGITIS

Masateru Tanaka; Shigeyuki Katakai; Kei Masamoto; Isao Kawakita; J. Kobayashi; Toshio Kobayashi; Akio Kajihara; Ryuzo Fueki; Setsuo Kobayashi

症例, 22才の男.昭和49年2月,胆のう炎の治療のため,アンピシリン,クロキサシリンの投与を受け, 3カ月後に,両下肢に発疹が出現,抗生物質を中止したが,発疹は消失しなかつた.同年8月喘鳴を伴う咳嗽が出現した.その後発疹が悪化したため,同年10月16日,当科に入院となつた.入院時,全身のリンパ節腫大と両下肢の発疹を認めた.末梢血では著明な好酸球増多を認めた. β-globulin, γ-globulin, Ig-Gが軽度に上昇していた.胸部X線像では両側中肺野に網状陰影を認めた.下腿発診部の生検像では血管壁はfibrinoid壊死に陥り,血管周囲には好酸球を主とした細胞浸潤がみられた.皮膚生検像よりアレルギー性血管炎と診断された.本症の発生には薬剤アレルギーの関与が報告されている,本例ではぺニシリン投与後発疹を生じているがぺニシリンに対する沈降抗体は,証明されなかつた.本症例は,著明な好酸球増多を認め,喘息の合併,皮膚生検像によるアレルギー性血管炎の証明から,アレルギー性肉芽腫性血管炎(allergic granulomatous angitis (Churg and Strauss)),あるいは呼吸器症状を伴う結節性動脈周囲炎(polyarteritis nodosa with pulmonary involvement (Rose and Spencer))に一致すると考えた.


The Japanese journal of thoracic diseases | 1988

A case of suspected allergic granulomatous angiitis following allergic bronchopulmonary fungal disease

Osamu Hagiwara; Tsugio Nakazawa; Shigeru Matsui; Susumu Miura; Akira Saito; Yoshio Umegae; Masashi Inazawa; Ryuzo Fueki; Setsuo Kobayashi


Arerugī (Allergy) | 1986

Cell membrane fluidity of lymphocytes in asthmatic patients

Iizuka K; Yoshie Y; Nakazawa T; Matsui S; Umegae Y; Ryuzo Fueki; Setsuo Kobayashi


Arerugī (Allergy) | 1987

[Investigation of the beta-adrenergic dysfunction on hormone-sensitive adenylate cyclase system in asthmatic lymphocyte cell membranes].

Iizuka K; Yoshie Y; Matsui S; Umegae Y; Ryuzo Fueki; Setsuo Kobayashi; Nakazawa T


The Japanese journal of thoracic diseases | 1982

A case of hypersensitivity pneumonitis due to inhalation of spores of Pholiota nameko

Takao Tochigi; Tsugio Nakazawa; Kunio Dobashi; Masahito Inazawa; Ryuzo Fueki; Setsuo Kobayashi


Arerugī (Allergy) | 1984

[A case of nephrotic syndrome with IgE antibodies to many allergens, treated successfully with Tranilast].

Umegae Y; Nakazawa T; Matsui S; Ryuzo Fueki; Setsuo Kobayashi

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