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Biomedical subjects

A Inoue

Publications and source records attributed to A Inoue.

At least 361 records · Page 20Linked to original sources
PubMed1991

Chromosomal assignments of the human endothelin family genes: the endothelin-1 gene (EDN1) to 6p23-p24, the endothelin-2 gene (EDN2) to 1p34, and the endothelin-3 gene (EDN3) to 20q13.2-q13.3.

Chromosomal assignments of the genes for the human endothelin family, the endothelin-1 gene (EDN1), the endothelin-2 gene (EDN2), and the endothelin-3 gene (EDN3), were accomplished by in situ hybridization to human metaphase chromosomes using a 3H-labeled human preproendothelin cDNA probe for each endothelin. The chromosomal assignment of the EDN2 was also performed by Southern blot analysis of somatic cell hybrid DNAs. EDN1, EDN2, and EDN3 were mapped to 6p23-p24, 1p34, and 20q13.2-q13.3, respectively.

Chromosome Banding↗
PubMed1990

[Chemoembolization therapy with lipiodol, cisplatin and etoposide for hepatocellular carcinoma].

Chemoembolization using CDDP, VP-16 and lipiodol was carried out for 7 patients with hepatocellular carcinoma (HCC). CDDP/lipiodol, CDDP/VP-16, CDDP/lipiodol (lipiodol 2-10 ml, CDDP 1-2 mg/kg, VP-16 100 mg/body) and gelatine sponge were administered in that order through the catheter located in the proper, or right or left hepatic artery. Three patients underwent hepatic resection 38-50 days after this treatment. Complete necrosis of the tumor was recognized in the one case, although the portion of necrosis did not exceed 70% in large sized HCC as the diameter of more than 10 cm. In 4 unresectable cases the decreases in tumor size were observed by ultrasonography and computed tomography. The response was: 3 partial responses and 1 no change. One out of 4 cases could undergo hepatic resection 17 months after this treatment. Two patients are alive 20 months after this treatment, although one patient died of HCC after 25 months. Serious side effect was not observed.

Aged↗
PubMed1990

[A case report of very huge dermatofibrosarcoma protuberans].

A 63-year-old male with dermatofibrosarcoma protuberans of the right hip is presented. The patient noticed a small nontender mass 40 years ago and then the tumor enlarged gradually. The patient was very emaciated and needed to receive blood transfusions. The massive multinodular tumor was pedunculated and on it's surface, there were areas of hemorrhage and secondary infection. The operative specimen weighted 2270 g and measured up to 25 by 20 by 10 cm. To our knowledge, this case represents the largest primary tumor of a dermatofibrosarcoma protuberans in review of English literature.

Fibrosarcoma↗
PubMed1990

Immunohistochemical demonstration of nuclear S1 proteins in various cells.

S1 proteins are present in the nuclear structures sensitive to DNases and RNase. To examine localization of these proteins, an antibody was raised in a rabbit. Indirect immunofluorescence staining revealed that S1 proteins located in the extranucleolar nuclear regions of quiescent myocardial and cerebellar cells as well as actively duplicating mouse 3T3 fibroblasts. They located in euchromatin regions of thymus lymphocytes, with a characteristic aster-like immunofluorescence pattern, and on the border of condensed chromatin areas by deposition of immunogold particles in ultrathin sections of thymus. Thus, S1 proteins may be in a nuclear function assigned to the border of heterochromatin areas, and other than synthesis of DNA or of ribosomal RNA. Possible involvement of S1 proteins in the extranucleolar RNA synthesis is discussed.

Animals↗
PubMed1990

Two splenic soluble tyrosine kinases from the rat.

Tyrosine kinase was extracted from rat spleen. Some 60% of the activity with angiotensin as the substrate was found in the cytoplasmic supernatant obtained at 100,000g. Two kinases in the supernatant, TKI and -II were purified 170- and 600-fold, respectively, by column chromatography. The molecular weights of TKI and -II were estimated to be 38,000 and 30,000 by Sephacryl S-200 gel filtration, and to be 42,000 and 36,000 by sodium dodecyl sulfate-polyacrylamide gel electrophoresis. Experiments with various protease inhibitors suggested that these kinases were not the artifacts of proteolysis. Both kinases autophosphorylated their tyrosine residues. They had different Kms for angiotensin II, and for ATP, but similar dependencies on temperature and on divalent metal ions.

Animals↗
PubMed1990

Development of a new type of influenza subunit vaccine made by muramyldipeptide-liposome: enhancement of humoral and cellular immune responses.

The muramyldipeptide (MDP), [6-O-(2-tetradecyl-hexa-decanoyl)-N-acetylmuramyl-L-isoglutamine] can be incorporated into liposomes with haemagglutinin and neuraminidase subunits were attached to the inner and outer surfaces of lamellar structures of the liposomes, probably through their hydrophobic ends. The addition of cholesterol resulted in much more stable liposomes, which were similar in size and shape to native influenza virus particles. These liposomes enhanced the immunogenicity of haemagglutinin in mice, such that the levels of antibody induced were about 16-fold higher than those of subunit haemagglutinin vaccine alone. Results of proliferation tests with spleen cells from mice and guinea-pigs were consistent with the immunopotentiation of haemagglutinin by liposomes. In addition, the higher antibody levels produced in mice, immunized with the haemagglutinin and MDP-containing liposomes (MDP-virosomes), were maintained for at least 6 months. Enhancement of the cellular immune response, measured by delayed type hypersensitivity reactions, was also observed in the guinea-pigs immunized with MDP-virosome vaccine. Preliminary tests with splenocytes from mice immunized with different vaccines also indicated that the MDP-virosome vaccine induced cytotoxic T-cell activity in these mice. This study revealed that the formation of liposomes with muramyldipeptide enhanced the level and persistence of circulating antibody, and enhanced cellular immunity in guinea-pigs and mice.

Acetylmuramyl-Alanyl-Isoglutamine↗
PubMed1990

Growth inhibition and morphological changes of LLC-PK1 induced by ultimobranchial calcitonins.

Ultimobranchial calcitonins (CTs), known to stimulate cAMP production, inhibited the growth of a porcine kidney cell line LLC-PK1. This inhibition was accompanied by degenerative changes including vacuole formation and cell detachment. The electron microscopic study revealed marked swelling of rough endoplasmic reticulum (RER). Other cAMP-increasing agents such as human CT, arginine, vasopressin, and forskolin showed less growth inhibitory activities and no induction of the degenerative changes. These results indicate that the growth inhibition of LLC-PK1 by ultimobranchial CTs is mainly due to cellular death caused by the swelling of RER via a signalling pathway other than the cAMP-dependent event(s).

8-Bromo Cyclic Adenosine Monophosphate↗
PubMed1990

Fatty acyl-CoAs are potent inhibitors of the nuclear thyroid hormone receptor in vitro.

We report that long-chain fatty acyl-CoAs are potent inhibitors of the thyroid hormone (T3) receptor isolated from rat liver nuclei. Both saturated and unsaturated fatty acyl-CoAs were similarly potent. Fifty per cent inhibition of T3 binding by the receptor was observed at an oleoyl-CoA concentration as low as 1.3 microM, and the affinity of oleoyl-CoA for the receptor (Ki) was estimated to be 0.45 microM. Fatty acyl-CoAs also promoted dissociation of the hormone bound to the receptor. The action of fatty acyl-CoAs was competitive for the hormone binding site, resulting in a reduction in the receptor's affinity for T3. These observations suggest that fatty acyl-CoAs modulate the binding of the thyroid hormone to its nuclear receptor, in vitro. Whether or not such events occur in vivo remains to be determined.

Acyl Coenzyme A↗
PubMed1990

Increased focal uptake of Tc-99m stannous phytate in an irregular fatty liver demonstrated by SPECT imaging.

An area of focally increased uptake of Tc-99m colloid (hot spot) in the liver has been reported in superior vena cava syndrome, Budd-Chiari syndrome, and focal nodular hyperplasia. A case of irregular fatty infiltration in which SPECT imaging clearly demonstrated an area of focally increased uptake in the left lobe of the liver, which was not well visualized by planar imaging, is presented. There have been a few previous reports of this finding on SPECT imaging in patients with irregular fatty infiltration of the liver.

Fatty Liver↗
PubMed1990

Clinical value of magnetic resonance imaging for cervical myelopathy.

The magnetic resonance imaging (MRI) findings in 115 cases of cervical myelopathy, 121 cases of cervical radiculopathy, and 64 cases of neck pain with no neurologic deficit were prospectively studied to investigate the clinical value of MRI for cervical myelopathy. The MRI findings in the T1-weighted sagittal projection were classified into four groups according to the degree of the compressed deformities of the cervical cord. The degree of compression of the cervical cord on MRI findings showed a significant correlation with the severity of myelopathy, the anteroposterior diameter of the spinal column, and the degree of compression of the dural tube in the myelograms (P less than 0.01). Fifty-one patients of cervical myelopathy had undergone both preoperative and postoperative MRI. Of these, the spinal canal of 47 patients that was well decompressed was recognized according to plain computed tomography (CT). However, 24 (51%) of these 47 patients showed on MRI a deformity in the spinal cord amounting to cord atrophy. The correlation between the clinical function of the spinal cord and the recovery of the cord deformity on MRI at the operative levels was accurately investigated in 34 patients who had no cord deformities in the adjacent intervertebral levels. Twenty patients with cord atrophy had slightly poor clinical results, although no significant difference was found between these 20 and 14 patients with recovery in the cord deformities. From these results, it was evident that T1-weighted MRI is useful in the accurate diagnosis of compression myelopathy, in accurately deciding the level of the disease focus, and in the accurate assessment of the surgical results.

Cervical Vertebrae↗
PubMed1990

Malignant lymphoma of lymphoplasmacytic/lymphoplasmacytoid and immunoblastic types.

Sixty-four patients with extranodal non-Hodgkin's lymphomas of lymphoplasmacytic/lymphoplasmacytoid (LP) and immunoblastic (IBS) types were reviewed. The criteria distinguishing the latter from the former was a presence of basophilic and prominent nucleoli in a vast majority of the tumor cells. The numbers of LP and IBS types were 34 and 30, respectively. Intervals from appearance of tumors to initial treatment in LP and IBS were 15.7 +/- 25.3 and 6.0 +/- 12.3 months, respectively (p less than 0.1). Histologically LP had a low mitotic count (p less than 0.001) and contained a larger number of mast cells (p less than 0.05) than IBS. Proliferating cells in 4 patients with LP type had nuclei with a slightly irregular indentation similar to those of intermediate lymphocytic lymphoma. Follow-up study revealed the LP type to have a much more favorable prognosis than the IBS type (p less than 0.001) though 3 patients with LP showed unfavorable prognosis. Tumor cells in these tumors had a small to medium-sized, often convoluted nucleus. The present results showed that the distinction of LP and IBS by their morphology of nucleoli was prognostically meaningful. Furthermore it is suggested that tumors of the LP type are heterogeneous.

Adult↗
PubMed1990

Plasma endothelin levels in hypertension and chronic renal failure.

Endothelin-1 is a novel endothelium-derived vasoconstrictive peptide. Using a highly specific and sensitive radioimmunoassay for endothelin-1, plasma levels of immunoreactive endothelin-1 were measured in 32 research subjects with normal renal function (21 normal subjects and 11 patients with essential hypertension), 24 patients with nondialyzed chronic renal failure, and 51 patients undergoing maintenance hemodialysis. Although there was no significant difference in plasma immunoreactive endothelin-1 levels among the three groups, patients with essential hypertension had significantly higher plasma endothelin-1 levels than normal subjects (2.29 +/- 1.09 vs. 1.41 +/- 0.50 pg/ml, p less than 0.025). When nondialyzed and hemodialyzed patients were divided into hypertensive and normotensive groups, the nondialyzed hypertensive group (n = 17) had higher plasma endothelin-1 levels than the comparable normotensive group (n = 7) (3.08 +/- 3.43 vs. 0.73 +/- 0.34 pg/ml, p less than 0.05), and the hemodialyzed hypertensive group (n = 18) had higher plasma endothelin-1 levels than the comparable normotensive group (n = 33) (2.66 +/- 1.92 vs. 1.35 +/- 0.73 pg/ml, p less than 0.005). Plasma atrial natriuretic factor, arginine vasopressin, renin activity, and aldosterone concentration did not show significant differences between hypertensive and normotensive individuals or a correlation with plasma endothelin-1 levels. These data suggest that circulating endothelin-1 may be partly involved in the development or maintenance of hypertension in humans.

Endothelins↗
PubMed1990

An antibody to S1 proteins from rat liver.

S1 proteins (A, B, C and D) are a group of nuclear proteins, isolated by lowering pH to 4.9 of the reaction supernatant of hepatocyte nuclei that had been mildly digested with DNase I. Protein B, apparently ubiquitous in vertebrate cells, was prepared from rat liver and used to immunize a rabbit. The raised antiserum specifically reacted with S1 proteins; it reacted not only with protein B, but also with C and D. Immunoblotting demonstrated that these proteins occurred exclusively in the nucleus, being absent in the cytosol, microsome and mitochondrial fractions. Indirect immunofluorescence of liver tissue sections confirmed their nuclear localization, and further showed that the antibody selectively stained extranucleolar regions of the cell nucleus. These findings suggest that the anti-S1 antibody is specific to S1 proteins and may be useful for their structural and functional studies.

Animals↗
PubMed1990

Study on the endothelin gene and its expression.

Endothelin (ET) is a potent vasoconstrictor peptide produced by vascular endothelial cells. Three distinct human endothelin genes were cloned and analysed. The results demonstrated that there were three distinct mRNAs for ET and that TPA-responsive element, mRNA stabilizing sequence, motifs for binding site of nuclear factor 1 and acute phase reactant regulatory elements were recognized in preproform ET-1 gene.

Animals↗
PubMed1990

Serotypes and antimicrobial susceptibility of Pseudomonas aeruginosa strains isolated from diseased dogs.

Strains of Pseudomonas aeruginosa isolated from diseased dogs in Tokyo area during 1983 through 1986 were serotyped and assayed for antimicrobial susceptibility to obtain an epizootiological aspect of canine P. aeruginosa infection. Major sources of specimens were ear and nasal discharges and urine. The results of O-antigen typing using a monoclonal antibody kit showed that the most predominant serotype was type M. Types G and B were also major serotypes. In a yearly distribution of serotypes, type I was almost limited in 1986, and was isolated mainly from surgical wounds, which showed an episode of nosocomial infection, whereas that of type M or B was dispersed during 4 years from 1983 to 1986. As a result of antimicrobial susceptibility test, most canine strains were considered to be susceptible to 4 drugs, which were commonly used in both human and veterinary clinics, in contrast to human isolates.

Animals↗