PubMed Health⌕ Search

Biomedical subjects

Y Sanada

Publications and source records attributed to Y Sanada.

At least 55 records · Page 3Linked to original sources
PubMed1992

Serological survey of Rhodococcus equi infection in horses in Hokkaido.

Serological survey of Rhodococcus equi infection in horses in Hokkaido was performed using ELISA. Of 2,879 horse sera, 318 (11.0%) gave antibody-positive (OD greater than or equal to 0.3) reactions. The antibody-positive rate of female was significantly higher (p less than 0.01) than that of male, and no statistical difference between Anglo-Arab and thoroughbred was detected in the antibody-positive rate. The maximum antibody-positive rate (27.1%) was shown at 14 years of age. The antibody-positive rates on the 160 farms were found to vary widely from 0 to 78.9%. A significant difference (p less than 0.01) in the antibody-positive rate was detected among horse farms. It was elucidated that 100 (62.5%) out of 160 horse farms had an antibody-positive horse. These results indicate that R. equi was widespread on horse farms, and the level of environmental contamination with R. equi differed among horse farms.

Actinomycetales Infections↗
PubMed1992

The effect of carnitine on the metabolism of valproic acid in epileptic patients.

The half-life of valproic acid (VPA) was studied in 8 epileptic and severely mental retarded patients before and after one month of carnitine supplementation. Serum carnitine concentration was significantly decreased and VPA half-life was prolonged especially in adult patients before carnitine supplementation. After the treatment with carnitine, serum carnitine concentration was increased, and prolonged half-lives of VPA were corrected near to the normal range (from 12.2 +/- 4.2 hr to 9.7 +/- 2.2 hr; p < 0.05). Controlled state of epilepsy was unchanged during the short period of observation.

Adolescent↗
PubMed1991

Expression of photosynthetic genes from the C4 plant, maize, in tobacco.

Previous results from this laboratory have demonstrated the presence of genes for phosphoenolpyruvate carboxylase and pyruvate, orthophosphate dikinase in C3 plants. The structure and light-enhanced expression of these genes is very similar to that of the genes found in the C4 plant, maize. In order to investigate whether or not the regulation of these genes is similar in C3 and C4 plants, we have constructed chimeric genes using beta-glucuronidase as a reporter gene under the control of the maize promoters of the genes for phosphoenolpyruvate carboxylase, pyruvate, orthophosphate dikinase, and the small subunit of ribulose bisphosphate carboxylase (RuBisCO). The chimeric genes were introduced into tobacco, a C3 plant. These genes were expressed primarily in leaf and stem tissue and the expression was enhanced by light. Thus, as in C4 plants, the genes are expressed in a tissue-specific and light-inducible manner in the C3 plant. Since the expression of these genes is restricted to specific cells in leaf tissue of C4 plants, we also investigated the spatial pattern of expression of the chimeric genes using histochemical analysis of beta-glucuronidase activity. High level expression of all of these genes was found in mesophyll cells. This included the small subunit of RuBisCO, which is not expressed in mesophyll cells but in bundle sheath cells in C4 plants. This report describes similarities between C3 and C4 plants in regulating the expression of these genes.

Base Sequence↗
PubMed1991

Ferredoxin and ferredoxin-NADP reductase from photosynthetic and nonphotosynthetic tissues of tomato.

Ferredoxin and ferredoxin-NADP+ oxidoreductase (FNR) were purified from leaves, roots, and red and green pericarp of tomato (Lycopersicon esculentum, cv VFNT and cv Momotaro). Four different ferredoxins were identified on the basis of N-terminal amino acid sequence and charge. Ferredoxins I and II were the most prevalent forms in leaves and green pericarp, and ferredoxin III was the most prevalent in roots. Red pericarp of the VFNT cv yielded variable amounts of ferredoxins II and III plus a unique form, ferredoxin IV. Red pericarp of the Momotaro cv contained ferredoxins I, II, and IV. This represents the first demonstration of ferredoxin in a chromoplast-containing tissue. There were no major differences among the tomato ferredoxins in absorption spectrum or cytochrome c reduction activity. Two forms of FNR were present in tomato as judged by anion exchange chromatography and by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. FNR II had a lower apparent relative molecular weight, a slightly altered absorption spectrum, and a lower specific activity for cytochrome c reduction than FNR I. FNR II could be a partially degraded form of FNR I. The FNRs from the different tissues of tomato plants all showed diaphorase activity, with FNR II being more active than FNR I. The presence of ferredoxin and FNR in heterotrophic tissues of tomato is consistent with the existence of a nonphotosynthetic ferredoxin/FNR redox pathway to support the function of ferredoxin-dependent enzymes.

Amino Acid Sequence↗
PubMed1990

Novel forms of ferredoxin and ferredoxin-NADP reductase from spinach roots.

Ferredoxin and the enzyme catalyzing its reduction by NADPH, ferredoxin-NADP reductase (ferredoxin-NADP+ oxidoreductase or FNR), were found to be present in roots of spinach (Spinacia oleracea). Localization experiments with endosperm of germinating castor beans (Ricinus communis), a classical nonphotosynthetic tissue for cell fractionation studies, confirmed that ferredoxin and FNR are localized in the plastid fraction. Both proteins were purified from spinach roots and found to resemble their leaf counterparts in activity, spectral properties, and complex formation, but to differ in amino acid composition and amino terminal sequence. The results indicate that the primary structures of the FNR and ferredoxin of spinach roots differ from that of the corresponding leaf proteins. Together with earlier findings, the present results provide evidence that nonphotosynthetic plastids, including those of roots, are capable of reducing ferredoxin with heterotrophically generated NADPH.

Amino Acid Sequence↗
PubMed1990

[Preoperative chemotherapy and anti-cancer effect of gastric carcinoma].

For the purpose of the study of macroscopical and histopathological anti-cancer effects, preoperative cancer chemotherapy was performed in 31 cases with gastric carcinoma. Gastric carcinoma with preoperative chemotherapy showed advanced cancer in 15 cases, and early cancer in 16 cases. During preoperative chemotherapy, the drug 5-Fu or 5'-DFUR was administered orally. The results were as follows; i) Macroscopical change of early cancer cases with anti-cancer chemotherapy showed the onset and healing of ulceration in the cancerous lesion and the change of granular pattern in the IIc floor. ii) Early cancer cases had a multi-centric histopathological anti-cancer effect which showed regenerative epithelium in the cancerous lesion. iii) The extent of the histopathological anti-cancer effect in advanced carcinoma showed greater in the deep layer of cancer invasion. Consequently, morphological changes of early cancer cases with chemotherapy are similar to the cases without chemotherapy. The onset of cancer damage in advanced carcinoma is in the cancer invasive zone, deep layer.

Administration, Oral↗
PubMed1990

Changes in lymphocyte blastogenic response of mares during the perinatal period.

A fluorometric assay was applied to evaluate blastogenesis of equine lymphocytes. Optimal culture conditions were as follows; concentrations of phytohaemagglutinin-P (PHA), concanavalin A (Con A) and pokeweed mitogen (PWM) were 1 microgram/ml, 40 micrograms/ml and 10 micrograms/ml, respectively, when 5 X 10(5) lymphocytes were incubated with culture medium containing 20% pooled horse serum (PHS) for 120 hours. The relative mean stimulation index of healthy non-pregnant mares were 5.107 +/- 0.323 (M +/- SE) with PHA, 4.019 +/- 0.183 with Con A and 3.610 +/- 0.131 with PWM. Sequentially the blastogenic responses of lymphocytes from twenty mares were observed during various stages of the perinatal period. Response decreased gradually before parturition was lowest at the time of parturition (PHA: 1.923 +/- 0.174, Con A: 1.698 +/- 0.206 and PWM: 1.706 +/- 0.177), and then increased gradually after parturition towards non-pregnant levels.

Animals↗
PubMed1990

[A progressive gastric cancer in which preoperative oral chemotherapy resulted in a histopathological "Grade 2" rating].

This paper describes a case of a Borrmann type 3 gastric cancer, in which the preoperative intermittent oral administration of 5'-DFUR over a short term resulted in a histopathological rating of Grade 2. A 56-year-old man preoperatively received an intermittent, oral administration of 5'-DFUR, 2, 100 mg/day. An upper gastrointestinal series and endoscopy revealed macroscopically an extremely slight remission. Histopathologically, however, a widespread, remarkable degeneration of cancer cells and fibrinogenesis of the framework were observed, these results leading to a change of rating to Grade 2.

Adenocarcinoma↗
PubMed1990

[Prognosis of gastric carcinoma sited in the cardiac part determined by the type of esophageal invasion].

A study has been made of type and prognosis of esophageal invasions exhibited by gastric carcinomas sited in the cardiac part of the stomach. Examined were 14 such cases of an adenocarcinoma with an esophageal invasion. Histopathologically, the invasions into the esophagus were classified into 4 types of severity, from 1 to 4, according to the depth of the invasion into the esophago-gastric junction (EGJ) and the pattern of the invasion to the oral side (thoracic side). The prognosis was found to be good for EGJ invasion that had penetrated to the pm and/or sm layer only, whereas it was very bad if the invasion had penetrated the entire EGJ wall (the pm, sm, mp, and the sa) and the infiltrative pattern had reached the oral side (thoracic side). Almost all patients given a type 4 classification soon had a recurrence after surgery and did not live beyond two years. Thus, a close relationship has been noted between the type of invasion into the esophagus and the prognosis.

Adenocarcinoma↗
PubMed1989

[Surgical treatment of esophageal stenosis with recessive dystrophic epidermolysis bullosa--esophageal dilatation using balloon catheter method].

We report the details of our treatment of 5 patients with recessive dystrophic epidermolysis bullosa (RDEB). Good results were obtained by esophageal dilatation using the balloon catheter method. Prior to the operation, we corrected the patients' nutritional status with oral supplementation of Hinex-R as well as intravenous drip infusion of Intra-lipid, based on the nutrition index obtained by body weight, serum albumin, rapid turnover proteins, and blood minimum essence. After sufficient anesthesia of the nasopharyngeal mucosa with xylocain spray, we inserted a Microvasive Rigiflex Balloon Dilator into the stenotic region while scanning the upper GI. Then we dilated gradually by barium injection. The patients' condition improved after this treatment and follow up X-ray examination revealed no recurrence of stenosis. There were several advantages to this method: 1) It was safer and could be done repeatedly. 2) It caused less stress for patients. 3) Its effectiveness appeared rapidly. We analyzed the frequency and severity of esophageal stenosis of 12 cases with EB in our department. Ten out of 12 cases complained of subjective esophageal symptoms. Esophageal stenosis was observed in all 8 cases examined by esophagogram. We concluded that this surgical procedure for esophageal stenosis was as important as digit reconstruction in the management of RDEB.

Adolescent↗
PubMed1988

[Problems and difficulties in adapting period in infants and children after massive intestinal resection].

In the period of intestinal adaptation following massive resection of intestine, patients have several difficulties and problems. This study was done in 17 survivals of 31 infants and children received massive intestinal resection (residual intestine; less than 75 cm) between 1966-1987 to define these problems and difficulties. 1) Postoperative hepatic dysfunction occurred in 11 of the 17 survivals. The relationship between relapsing frequency of hepatic dysfunction and length of remaining ileal segment suggested that the reduced ileal length may be one of the etiologic factors of the hepatic dysfunction. 2) Evaluation of serum bile acid levels suggested that the disturbance of bile acid reabsorption and its rapid turn over might still remain even after catch-up growth of these patients. 3) Abnormal levels of serum minerals (Ca, InP, Mg, Zn and Cu) were observed in 4 cases during TPN, and these abnormalities disappeared by discontinuation of parenteral nutrition and beginning of oral feeding. 4) Serum vitamin levels (Vit.A, Vit.E, 25-OH-D3, and Vit.B12) still remained in abnormal even after the patients reached school age. These results suggested that very long-term nutritional cares, especially in lipid and vitamin nutrition, are necessary for the children with massive intestinal resection.

Bile Acids and Salts↗