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Biomedical subjects

Y Ono

Publications and source records attributed to Y Ono.

At least 955 records · Page 53Linked to original sources
PubMed1986

[Early phase II trial of bestrabucil in hematological malignancies].

Thirty-three patients with various hematological malignancies were treated with Bestrabucil, the benzoate of an estradiol-chlorambucil conjugate, at doses of 50-300 mg daily p.o., consecutively. Nineteen patients had previously received chemotherapy. Of 29 evaluable patients, there were one CR and three PRs among 6 patients with chronic lymphocytic leukemia, two CRs and one PR among 4 patients with malignant lymphoma, two PRs among 3 patients with adult T-cell leukemia, one PR among 4 patients with macroglobulinemia, one PR for one patient with essential thrombocythemia, and one PR for a patient with chronic myelocytic leukemia. Main side effects included G1 symptoms (14%), estradiol-related symptoms (24%) and myelosuppression (32%).

Adult↗
PubMed1986

[Glucose metabolism in ischemic myocardium: quantitative imaging using positron emission tomography].

We determined the myocardial metabolic rate for glucose (MMRGlc) in the ischemic or infarcted myocardium using 18-F-fluorodeoxyglucose (18-FDG) with positron emission tomography (PET), and studied energy metabolism in the ischemic myocardium. In some cases, we compared glucose metabolism images by 18-FDG with myocardial blood flow images using 15-oxygen water. Two normal subjects, seven patients with myocardial infarction and four patients with angina pectoris were studied. Coronary angiography was performed within two weeks before or after the PET study to detect ischemic areas. PET studies were performed for patients who did not eat for 5 to 6 hours after breakfast. Cannulation was performed in the pedal artery to measure free fatty acid, blood sugar, and insulin. After recording the transmission scan for subsequent correction of photon attenuation, blood pool images were recorded for two min. after the inhalation of carbon monoxide (oxygen-15) which labeled the red blood cells in vivo. After 20 min., oxygen-15 water (15 to 20 mCi) was injected for dynamic scans, and flow images were obtained. Thirty min. after this procedure, 18-FDG (5 to 6 mCi) was injected, and 60 min later, a static scan was performed and glucose metabolism images were obtained. Arterial blood sampling for the time activity curve of the tracer was performed at the same time. According to the method of Phelps et al, MMRGlc was calculated in each of the region of interest (ROI) which was located in the left ventricular wall. MMRGlc obtained from each ROI was 0 to 17 mg/100 ml/min. In normal subjects MMRGlc was 0.4 to 7.3 mg/100 ml/min.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗
PubMed1986

[Arteriovenous malformation. 3. Dynamic CT of arteriovenous malformation].

Various methods have been reported for the purpose of measurement of hemodynamics of the cerebral arteriovenous malformations. In this paper, using a TCT-60A-30 scanner, dynamic computed tomography was performed on 18 cases with arteriovenous malformations. The initial scan of the dynamic CT was started simultaneously with the start of an intravenous injection of uniodinated contrast medium (8 ml/sec.), serial 4.5 sec. scan repeated 8 times. The data for each scan were segmented into three, and a series of 24 rapid-sequence scan images (CT-angiography) was generated. The time-density curve by use of Thompson's methods was analyzed with multiple ROIs which were bilaterally set up for the nidus and its surrounding areas considering each arterial supply. And the flow parameters, such as the peak concentration (PC), the mean transit time (MTT) and the PC/MTT were calculated. We thought that under the condition of normal state of blood-brain-barrier and fixed standards of multiple factors such as the cardio-pulmonary function, systemic blood volume, viscosity of the blood and many others, PC manifested vascular beds of ROIs, MTT brain circulating time, PC/MTT blood flow respectively. In the ROIs of the nidus, high values of PC (115.7 +/- 51.9 CT number) and PC/MTT (14.8 +/- 6.28 CT number/sec.), and reduction of MTT (8.47 +/- 2.28 sec.) were revealed in comparison with surrounding areas. The ROIs of the nidus showed enlargement of vascular beds and blood flow and reduction of brain circulating time. On the other hand, in the ROIs surrounding the nidus, MTT of affected areas (10.33 +/- 2.78 sec.) was slow compared with it nonaffected areas (9.33 +/- 2.09 sec.), however PC and PC/MTT were equal in both areas.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1986

[Chronological changes in the blink reflex and MRI in a patient with lateral medullary infarction].

Recently, the brainstem pathways of bilateral late reflexes (R2) of electrically elicited blink reflex have been well established. An afferent delay or block of the late reflexes is closely related to a lesion of the lateral medullary portion. The chronological alteration of blink reflex (BR) was studied to compare with radiological abnormalities on MRI in a patient with lateral medullary infarction on the right side. A diagnosis of Wallenberg syndrome was made clinically and location of the lesion was identified in detail by MRI. The infarcted region which was well demonstrated as an increased intensity area on SE images obtained 52 days after the onset of symptoms was much smaller than that on SE as well as on IR image 21 days after the onset of symptoms. Therefore, it was concluded that more than half of the increased intensity area on the SE images obtained 21 days after the onset of symptoms recovered from the condition of being extremely damaged by ischemia on the right lateral medullary portion in this patient. On the other hand, in the initial BR 26 days after the onset of symptoms, the late reflexes (R2) were consistently absent bilaterally when the affected side (right) was stimulated and normal when the normal side (left) was stimulated. This type of BR abnormality is compatible with an afferent block of late reflexes (R2). The early reflex (R1) was normal on either side. Whereas in the second BR at 55 days after the onset of symptoms, the late reflexes turned to be normal in latency when the right side was stimulated.(ABSTRACT TRUNCATED AT 250 WORDS)

Blinking↗
PubMed1985

Indication of aortocoronary by-pass for coronary arterial obstruction due to Kawasaki disease.

Six patients with coronary arterial lesions due to Kawasaki disease underwent aortocoronary by-pass grafting at our institute. Before surgery, all of them had been closely monitored for some years by means of selective coronary arteriography, thallium myocardial imaging, electrocardiography (treadmill and/or Holter), and two-dimensional echo cardiography. Based on this experience, we propose the following guidelines as an indication for aortocoronary by-pass in such patients. First, the following three conditions should be satisfied: 1) The progress of coronary arterial lesions has been documented by serial selective coronary arteriography; 2) redistribution to the perfusion defect has been detected on the delayed image in myocardial imaging; 3) no coronary arterial lesions distal to the graft site have been detected by coronary angiography. When these three conditions are satisfied, at least one of the following conditions must apply: 1) Localized stenosis in the left main trunk has progressed to critical stenosis; 2) there is occlusion of two or more vessels; 3) collateral vessels connecting to the peripheral portion of an occluded coronary artery arise from the peripheral part of a vessel with progressive localized stenosis; 4) progressive localized stenosis or critical stenosis has developed in the left anterior descending artery, in addition to significant stenosis in the right coronary artery.

Adolescent↗
PubMed1985

Cyclosporin A effective therapy for fifty-two cadaver kidney recipients.

Fifty-two consecutive patients receiving cadaveric renal transplants were prescribed cyclosporin A and steroid therapy. Three of the recipients underwent re-transplantation and two of the patients were grafted with kidneys shipped from the United States. One year actuarial patient and graft survival rate with no exclusions were 94.2 percent and 81.6 percent, respectively, this rate being significantly better than results in case of the conventional combination of azathioprine, steroid and antilymphocyte globulin. The role of HLA-DR matching on cyclosporin A treatment was studied. One year actuarial graft survival rates of two HLA-DR matched and one HLA-DR matched were 91.7 percent and 78.9 percent, respectively. To assess the effects of cyclosporin A in the management of patients with acute tubular necrosis, the patients were divided into two groups, in terms of whether or not hemodialysis treatment was required for acute tubular necrosis. Although in the present protocol, cyclosporin A administration was begun before the operation, no significant differences in the graft survivals were evident between the two groups. Nephrotoxicity, hepatotoxicity and other side-effects of cyclosporin A could usually be dealt with by dosage adjustments, making feasible the chronic ingestion of this agent. The exceptional effectiveness and safety of cyclosporin A were evident throughout these early trials.

Adolescent↗
PubMed1985

Inhibition of transcriptase activity of influenza A virus in vitro by anti-haemagglutinin antibodies.

An investigation was made of inhibition of transcriptase activity of influenza viruses in vitro by binding of antibody to the surface of the virion. Eight monoclonal antibodies which were directed against at least four non-overlapping antigenic regions of the haemagglutinin protein of A/Aichi/68 virus were tested for inhibitory effect. One of the antibodies directed against the B antigenic site, 22/1, inhibited transcriptase activity, while the other seven antibodies did not. Antibody from a hyperimmune rabbit serum to A/Udorn/72 (H3N2) virions inhibited the transcriptase activity of A/Udorn/72 and A/Aichi/68 (H3N2) viruses but not that of A/WSN/33 (H1N1). The antibody did not cause irreversible inactivation of the transcriptase since full activity was recovered by isolating ribonucleoprotein (RNP) cores from the inhibited virions using NP-40 treatment and subsequent centrifugation in a caesium sulphate density gradient. The antibody did not inhibit transcriptase activity of isolated RNP cores. The virion transcriptase activity was not inhibited by addition of the antiserum after the detergent treatment which is necessary for the activation of the transcriptase activity in vitro. These results suggest that the antibody blocks the activation process of the transcriptase by detergent treatment.

Antibodies, Viral↗