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Biomedical subjects

Y Akatsuka

Publications and source records attributed to Y Akatsuka.

45 records · Page 3Linked to original sources
PubMed1990

[Therapeutic evaluation of combination therapy using C-425 and antibiotics in severe bacterial infections--a double blind group comparative study. The C-425 Research Group for Infectious Comparative Study].

Clinical usefulness of C-425, a native human immunoglobulin liquid preparation for intravenous injection, was studied in combination with antibiotics in severe bacterial infections in a double blind group comparison using an alkylated human immunoglobulin liquid preparation (Polyglobin, A.gamma G) as a reference drug. The following results were obtained: 1. C-425 or A.gamma G was administered to a total of 117 patients, of whom 89 patients, 45 in C-425 group and 44 in A.gamma G group, were included in the present analysis of efficacy and usefulness. Analysis of safety of the drugs included a total of 113 patients, 58 in C-425 group and 55 in A.gamma G group. 2. Efficacy and usefulness were graded according to a visual analog scale (VAS). 3. Mean efficacy values with standard deviations of VAS value were calculated at 52.0 +/- 34.9 for the C-425 group, and 47.2 +/- 34.8 for the A.gamma G group. The respective medians were 59.0 and 61.0. The Mann-Whitney U-test revealed no significant differences between the two groups. When those with VAS values of 50 or above were regarded as cases of effective treatment, the efficacy rates of the two groups were also practically comparable. 4. Side effects were not observed in either drug group. 5. Mean usefulness values with standard deviations were 52.3 +/- 34.9 for the C-425 group, and 47.9 +/- 35.0 for the A.gamma G group. The respective medians were 60.0 and 61.0. The Mann-Whitney U-test revealed no significant differences between the two groups. When the cases with VAS values of 50 or above were regarded as cases of useful treatment, there were no significant differences in the utility rates between the two groups. From these results, C-425 was considered to be useful for treating severe bacterial infections when used combined with antibiotics.

Adolescent↗
PubMed1989

[Combination chemotherapy with UFT, etoposide, CDDP, adriamycin (FEPA) in advanced gastric cancer].

Fifteen patients with inoperable advanced gastric cancer were treated with UFT.etoposide.CDDP.adriamycin (FEPA). Six were males and 9 were females with an average age of 58 (range 40 to 80 years). Nine patients were in P.S. 2 and 6 in P.S. 3. FEPA regimen was performed every 4 weeks as follows: UFT 400 mg/m2 (p.o.) every day, etoposide 50 mg/m2 (i.v.), CDDP 25 mg/m2 (i.v.) and adriamycin 10 mg/m2 (i.v.) on days 1, 8, 15 and 22. Among 15 patients, 6 partial remissions and 4 minor responses were obtained. Gastrectomy was performed in 2 of 6 PR patients after FEPA chemotherapy. The overall response rate was 40.0%. As for side effects, mild myelosuppression was the most frequent (66.7%), followed by alopecia and nausea. We concluded that combination chemotherapy of FEPA is useful for inoperable advanced gastric cancer.

Adenocarcinoma↗
PubMed1989

[Cyclosporine as prophylaxis for graft versus host disease in adults undergoing allogeneic bone marrow transplantation].

Fifteen adult patients undergoing allogeneic bone marrow transplantation (BMT) received cyclosporine (CSP) as prophylaxis of graft versus host disease (GVHD). In our patients eleven were hematologic malignancies, and four were severe aplastic anemia. Twelve patients were HLA-matched, and three were one locus mismatched. Three patients received CSP only, twelve received CSP and short term methotrexate. Seven patients had acute GVHD, but GVHD over Grade II were seen in only 3 patients who were transplanted from HLA-one locus mismatched donor. 7 patients had chronic GVHD. CSP were given intravenously at 3-5 mg/kg, starting 1 day before BMT. From about day 30, CSP was given orally. CSP concentrations when patients were given orally were lower in patients who had chronic GVHD. Although hypertension and water retention were seen in 8 patients, and renal dysfunction was seen in 3 patients, the side effects of CSP were mild and transient. There were no correlations between serum concentrations and the side effects of CSP. Three patients had the disturbance of hematopoiesis. Ten of fifteen patients are alive at median follow-up of 18.5 months (8-41 months) after BMT.

Adolescent↗
PubMed1984

Changes of an androgen-dependent nuclear protein during functional differentiation and by dedifferentiation of the dorsolateral prostate of rats.

Nuclei of the dorsolateral prostate of rats contain a large amount of androgen-dependent non-histone protein (20K-NHP) (mol. wt. not equal to 20,000; pI not equal to 11.5) (Matuo et al. (1]. Its content in the nuclei increased most markedly during 4-8 weeks of age, when functional differentiation of the prostate was most active on the basis of the changes of major cytosol proteins and zinc. Nuclei of the Dunning tumors originating in the dorsolateral prostate were found to lack 20K-NHP regardless of androgen dependency, indicating the disappearance of the 20K-NHP from the nuclei by dedifferentiation. These suggest that the 20K-NHP is an important nuclear protein for differentiation of the dorsolateral prostate cells.

Aging↗
PubMedDate not supplied

Effects of iomeprol, a new nonionic contrast medium, vis a vis iopamidol and nitroglycerin, on coronary diameter and blood flow in chronically instrumented dogs.

The effects of an intracoronary administration of iomeprol, a new nonionic tri-iodinated water-soluble contrast medium, on coronary circulation were compared to those of iopamidol and those of nitroglycerin in 6 chronically instrumented conscious dogs. A pair of 10 MHz piezoelectric crystals and an electromagnetic flow probe were placed on the left circumflex coronary artery (LCCA) to measure the epicardial coronary diameter (CD) and coronary blood flow (CBF). Polyethylene tubing for drug administration was inserted into the LCCA proximal to the sonomicrometers. Iomeprol at the dose of 1 ml and 3 ml/min for 1 min significantly increased CD by 0.6 +/- 0.1% and 1.4 +/- 0.3%, respectively and CBF by 44.5 +/- 9% and 70 +/- 10%, respectively. Iopamidol at the same rates also significantly increased CD by 0.8 +/- 0.1% and 1.5 +/- 0.3% and CBF by 50 +/- 11% and 82 +/- 14%, respectively. There was no statistically significant difference between iomeprol- and iopamidol-induced increases in CD and CBF. However, the duration of the increase in CD was significantly shorter (p < 0.05) after iomeprol than after iopamidol. Nitroglycerin (10 micrograms/kg) significantly increased CD by 4.5 +/- 1% and CBF by 105 +/- 10%. The increases in CD and CBF in response to iopamidol and iomeprol were significantly smaller (p < 0.01) than to nitroglycerin. We conclude that vasodilating effects of iomeprol and iopamidol on the large epicardial coronary artery and coronary blood flow are comparable in conscious dogs and significantly lower than after nitroglycerin in the doses used by us.

Animals↗
PubMedDate not supplied

T cell receptor clonal diversity following allogeneic marrow grafting.

The advent of methods for exploring T cell clonal diversity in detail by using the reverse transcriptase-polymerase chain reaction (RT-PCR) to amplify the CDR3 segment of the T cell receptor (TCR) Vbeta gene represents a powerful tool for analyzing and monitoring T cell clones that may be responsible for graft-versus-host disease (GVHD) or specific immunity. In this report we describe studies of the posttransplant peripheral blood T cell repertoire in two patients receiving marrow grafts from unrelated donors. One patient received an unmodified T cell replete graft and the second patient received a T cell-depleted marrow graft. Both patients were matched with their donors for HLA-A and -B, but differed for a DRB1 minor mismatch. The patient receiving a TCD graft showed a progressive loss of expression of several Vbeta genes during the first 6 months, although expression of some Vbeta genes appeared transiently following reduction of immune suppression therapy and evidence of acute GVHD. Spectratyping of CDR3 segments revealed evolution of new clones and clonal deletion during the posttransplant period. This method in conjunction with a functional analysis and monitoring of host-reactive clones would provide a new approach for evaluating the activity of immunosuppressive therapy.

Adult↗
PubMedDate not supplied

In vivo and ex vivo evaluation of the antithrombogenicity of human thrombomodulin immobilized biomaterials.

Human thrombomodulin (hTM) is a newly described endothelial cell associated protein that functions as a potent natural anticoagulant by converting thrombin from a procoagulant protease to an anticoagulant. Focusing on the establishment of the practical evaluation of hTM immobilized materials, the activity of immobilized hTM was evaluated by in vivo and ex vivo blood contacting tests. As the basis for immobilization, regenerated cellulose films and hollow fibers were used. For the in vivo test, hTM immobilized cellular hollow fibers were implanted into dog blood vessels. Using hTM immobilized cellulose hollow fibers, a small scale dialyzer was assembled and its antithrombogenic activity was studied using human blood. As a result, it was revealed that the immobilized hTM still has co-enzymatic activity for activation of Protein C and anticoagulant activity. The coagulation time of the human blood passed through the hTM immobilized small dialyzer was effectively prolonged. It is expected that hTM immobilized cellulose should be a useful antithrombogenic biomaterial.

Animals↗
PubMedDate not supplied

Peroxidase-labeled antibody staining for carcinoembryonic antigen of cytologic specimens for light and electron microscopy.

Immunohistochemical staining methods suitable for light and electron microscopic examination of cytologic specimens are described. Application of the methods clearly demonstrated the localization of carcinoembryonic antigen (CEA) in adenocarcinoma cells in body fluids. The use of a peroxidase-labeled antibody method permits rapid penetration of the cells by the antibody, which is not achieved by the peroxidase-antiperoxidase or avidin-biotin-peroxidase-complex staining methods. Since mesothelial and inflammatory cells are negative for CEA, the staining of body fluids for CEA is expected to be an extremely useful tool for the differential diagnosis of adenocarcinoma.

Adenocarcinoma↗