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Dive into the research topics where Keigo Nishimura is active.

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Featured researches published by Keigo Nishimura.


Gastroenterologia Japonica | 1989

Scirrhous carcinoma of the stomach: a clinical and pathological study of 106 surgical cases.

Shoichiro Hirose; Hideo Honjou; Hikohito Nakagawa; Keigo Nishimura; Yoshitaka Kuroda; Masahiko Tsuji; Atsuo Miwa; Masanobu Kitagawa

SummaryClinical and pathological characteristics of scirrhous carcinoma of the stomach were studied in 106 cases treated by gastrectomy between 1973 and 1983. The male to female ratio was 0.58. The percentage of scirrhous carcinomas to all gastric carcinomas resected in the same period was three times higher in females than males. The age distribution of the patients suggested that there were two peaks in the forties and sixties in the male, and in the thirties and fifties in the female. The incidence of scirrhous carcinoma in all types of gastric carcinoma was significantly higher in the twenties, thirties and forties compared to the lowest incidence in the seventies. In the female group the primary lesion had a tendency to be adjacent to the fundic gland area and to avoid intestinal metaplasia. In the male the opposite was recognized. Cancer nests with single cells or only several cells were common in this type of carcinoma. These findings suggest that there might be two biologically different scirrhous carcinomas both in the male and the female, the appearance of single carcinoma cells might be favored by female sex hormones and young ages, and not only the original gastric mucosa but also mucosa with intestinal metaplasia could be precursors of single carcinoma cells.


Gastroenterologia Japonica | 1977

Rapid turnover serum proteins in fulminant hepatitis

Kenichi Kobayashi; Shohji Kameda; Tatsuho Sugimoto; Kunihiko Suzuki; Keigo Nishimura; Yasuhiro Kato; Nobu Hattori

SummaryAn attempt was made to find reliable indices for early diagnosis of fatal cases of acute viral hepatitis, using the values of serum proteins with rapid turnover. Of the subfractions of serum protein, prealbumin, α2-HS-glycoprotein and Normotest were measured simultaneously before the appearance of hepatic coma/ or gastrointestinal bleeding in 78 cases of acute viral hepatitis, verified by biopsy or necropsy. The mean value of prealbumin with a very short half-life of one or two days, was 6.0 mg/dl in fatal cases, 7.4 mg/dl in surviving ones of subacute form of fulminant hepatitis. The difference between fatal and surviving cases was not statistically significant. In contrast to this, the values α2-HS-glycoprotein with a comparatively short halflife of four to six days, showed statistically significant difference between fatal (21.9 mg/dl) and surviving cases (37.4 mg/dl). Normotest was also depressed in fatal (10.7%) and surviving cases (45.3%). The difference was statistically significant. The present results indicate the possibility of differentiating fatal cases from surviving ones at an early stage, using the reduction of α2-HS-glycoprotein and the value of Normotest.


Kanzo | 1980

Inactivation of vesicular stomatitis virus by human serum

Keizo Tanaka; Masanobu Kanai; Akira Iwata; Tadashi Ikeda; Hikoto Nakagawa; Masashi Unoura; Nobuyoshi Tanaka; Keigo Nishimura; Yasuhiro Kato; Kenichi Kobayashi; Nobu Hattori; Fumiaki Ito; Motoichi Hatano

各種肝疾患患者13例,健康成人,臍帯血,無ガンマグロブリン血症患者各1例およびC3欠損症患者2例の計18例から得られた血清を対象に水泡性口内炎ウイルス(VSV)に対する抗ウイルス活性の性格に関する検討を免疫グロブリンおよび補体との異同を中心に行なった.抗ウイルス活性とIgG, IgM, IgAの蛋白量との間に相関性はなく,無ガンマグロブリン血症患者でも免疫グロブリンが高値を示すPBC等の肝疾患および健康人よりも抗ウイルス活性が高値を示した.また臍帯血でも活性が認められた.本活性とC3c, C4の蛋白量およびCH50値の間には相関性がなく,C3欠損症患者でも肝疾患患者および健康人よりも高活性を示した.補体のcoldactivation, 56°C, 30分の熱処理およびzymosan処理血清中にほとんどの抗ウイルス活性が残存していた.これらの成績から本抗ウイルス活性は免疫グロブリンと補体とは明らかに異なると思われる.


Kanzo | 1977

Cell-mediated immune rpsponses to ethanol and hepatitis B surface antigen in chronic liver diseases

Yasuhiro Kato; Jugoro Takeuchi; Keigo Nishimura; Tatsuho Sugimoto; Kunihiko Suzuki; Kenichi Kobayashi; Nobu Hattori

飲酒歴のみられない慢性肝障害36例(A群),大酒家の肝障害19例(B群)について,エタノールおよび精製HBsAg添加して白血球遊走阻止試験を行なった.エタノール添加によりLMT陽性を示したものは,36例中16例であり,とくにHBsAg陽性の慢性肝炎活動型,小葉改築傾向を伴う慢性肝炎活動型,非代償性肝硬変では陽性率は高値を示した.B群では19例中11例がLMT陽性を示し,亜小葉性肝硬変では4例全例がLMT陽性であった.大酒家の肝障害では,HBsAg陽性群の方が,陰性群より,精製HBsAg添加によりLMT陽性を示す症例が多くみられたが,肝病変の進展度にしたがって高値をとるとはいえなかった.以上の成績より,飲酒歴の著明でない活動性の強い慢性肝障害および大酒家の肝障害の一部の症例では,エタノール,精製HBsAgに対する細胞性免疫異常状態が成立しているものと推測されたが,病因論的については,今後の検討が必要である.


Kanzo | 1977

A clinicopathlogical study of acute hepatitis (The 2nd report)

Kenichi Kobayashi; Shoji Kameda; Tatsuho Sugimoto; Kunihiko Suzuki; Keigo Nishimura; Yasuhiro Kato; Nobu Hattori; Yasuhiro Nakaya; Shujiro Takase; Akira Takada; Jugoro Takeuchi

急性肝炎の予後不良例とくに早期死亡例の早期鑑別を目的として,rapid turnover serum proteinを明らかな肝性昏睡や消化管出血のみられる前に測定した.その結果血中半減期が1ないし2日間ときわめて短いprealbumin値は亜急性肝炎の死亡例,生存例ともに著減し差はみられなかった.しかし半減期4ないし5日間のα2-HS-glycoprotein値は死亡例と生存例で有意の差がみられ,かつ重なりもほとんどみられなかった.以上よりα2-HS-glycoproteinの測定は早期死亡例の鑑別に有用であると考えられた.


Kanzo | 1976

Pathogenetic role of cellular antibodies reacting with an organ-specific antigen of human hepato-cellular membrane in chronic liver disease

Keigo Nishimura

各種肝疾患患者の肝特異抗原(Lpfr II)および精製HBs抗原に対する細胞性免疫について検討した.肝特異抗原(倉田らの方法)と精製HBs抗原を添加抗原としてSobφrgらの方法で,各種肝疾患49例を対象に,白血球遊走試験(LMT)を行なった.LPfr II添加時のLMT陽性率は慢性肝疾患で41%であり,慢性化の程度にしたがって高くなる傾向を認め,血清HBs抗原陽性例の方が各疾患のなかではより高率であった.急性肝炎,HBs抗原carrierは全例陰性であった.HBs抗原添加時のLMT陽性率は慢性肝疾患で36%であり,かならずしも慢性化の程度にしたがって高率になるとは言えなかった.肝特異抗原添加時のLMT陽性例中,何らかの形でHBs抗原と関連していると考えられるものが81%をしめた.以上の成績より両抗原は細胞性免疫の形で肝疾患とくに慢性肝病変と関連を有していると推測された.また肝特異抗原をアフィニテークロマトグラフィーを用い単離することができたのであわせて報告した.


Nihon Naika Gakkai zasshi. The Journal of the Japanese Society of Internal Medicine | 1989

Two cases of anorexia nervosa associated with grossly abnormal liver function tests.

Akio Yamagata; Shoichiro Hirose; Nobuto Wakakuri; Hideo Honjou; Hikohito Nakagawa; Keigo Nishimura; Tadashi Kubo


Kanzo | 1980

Insulin-glucagon therapy on acute hepatitis

Nobuyoshi Tanaka; Yatugi Noda; Nobuyuki Hirai; Tadashi Ikeda; Takashi Okai; Hikohito Nakagawa; Akira Iwata; Masashi Unoura; Nobuto Morita; Mikio Kumagai; Shozi Kameda; Keigo Nishimura; Yasuhiro Kato; Kenichi Kobayashi; Nobu Hattori


Kanzo | 1977

Hepatoma development during long term follow-up period of liver cirrhosis

Kenichi Kobayash; Mikio Kumagai; Shoji Kameda; Tatsuho Sugimoto; Kunihiko Suzuki; Keigo Nishimura; Yasuhiro Kato; Goro Sugioka; Nobu Hattori; Jugoro Takeuchi


Kanzo | 1980

Effects of human leucocyte interferon therapy on hepatitis B virus in patients with chronic hepatitis

Yasuhiro Kato; Keizo Tanaka; Hikohito Nakagawa; Akira Iwata; Masashi Unoura; Nobuyoshi Tanaka; Mikio Kumagai; Keigo Nishimura; Kenichi Kobayashi; Nobu Hattori; Tadakazu Suyama

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