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Biomedical subjects

M Tsuji

Publications and source records attributed to M Tsuji.

At least 433 records · Page 24Linked to original sources
PubMed1986

Skin permeability of various non-steroidal anti-inflammatory drugs in man.

The skin permeabilities of a series of eight salicylates and ten non-steroidal anti-inflammatory drugs were investigated in human subjects. The logarithms of % absorption through intact skin and of n-octanol/water partition coefficients (log P) of the test compounds were plotted against one another, and a parabolic relationship was obtained in both compound series.

Absorption↗
PubMed1986

Determination of beta-phenylethylamine concentrations in human plasma, platelets, and urine and in animal tissues by high-performance liquid chromatography with fluorometric detection.

A highly sensitive method for the determination of beta-phenylethylamine in human plasma, platelets, and urine and in mouse tissue is described. The method is based on a two-step isolation using cation-exchange columns followed by reverse phase high-performance liquid chromatography with fluorometric detection. The recovery of the amine through the whole procedure was almost complete, ranging from 99 to 101%. The calibration graph appeared linear over the range of 50 to 5000 pg/injection. Urinary excretion of beta-phenylethylamine in humans ranged from 0.93 to 51.20 ng/mg creatinine. The amine was also detectable in plasma and platelets. Of the various mouse tissues examined, the highest concentrations were found in the small intestine, followed by the blood and liver. Concentrations of about 5 ng/g wet wt were detected in brain tissue, which increased remarkably after inhibition of monoamine oxidase by pargyline.

Animals↗
PubMed1986

Isolation of peripheral nerve collagen.

A new method for the isolation of high yields of collagen from human peripheral nerve is described. A major technique adopted in the present work is sedimentation of the tissue homogenates in a sucrose density gradient. The defatted fibrous material isolated after the removal of myelin was shown to be a relatively pure collagenous substance by amino acid analysis, indicating that the removal of noncollagenous proteins, especially glycoproteins, from collagen fibrils was effectively achieved by this method. The yield of collagen at this step was more than 90% of the total collagen in peripheral nerve. Subsequent extractions with solutions of neutral saline and sodium citrate were found to give further purification of the collagenous protein. The collagens from embryonic peripheral nerves were composed of Type I and III collagens, while Type III collagen was found to be less abundant in adult peripheral nerves.

Adult↗
PubMed1986

Angiographic findings in two carcinoid tumors of the gallbladder.

Angiography was performed in 2 patients with carcinoid tumors of the gallbladder. In the first case, proper hepatic angiography revealed an obstruction and irregular neovascularization of the cystic artery and an encasement of the right hepatic artery. In the second case, celiac angiography revealed a dilatation and fine neovascularization of the cystic artery. In both cases, moderate hypervascular metastatic lesions were demonstrated in the liver. Although hypervascular metastases might suggest the diagnosis of metastasis from carcinoid tumor, the specific diagnosis of carcinoid tumor of the gallbladder must rely on the pathologic evidence.

Carcinoid Tumor↗
PubMed1986

Effects of chronic administration of LH releasing hormone on age-dependent activities of testicular 4-ene-5 alpha-reductase and 17 beta-ol-dehydrogenase in mice.

Male (WB X C57BL/6)F1 hybrid mice of 16, 26 and 66 days of age, 4 in each group, were injected daily with 0.2 micrograms/10 g body weight of LH releasing hormone (LHRH) or saline for 14 days. Testicular homogenates were incubated with [14C]4-androstene-3,17-dione and enzyme activities were examined. In mice treated with saline, testicular 17 beta-ol-dehydrogenase activity increased with age but 4-ene-5 alpha-reductase (5 alpha-reductase) activity decreased with age. LHRH treatment for 14 days starting from day 26 resulted in a delay in sexual maturation, as evidence by significant decreases (P less than 0.05) in seminal vesicle weight and testicular 17 beta-ol-dehydrogenase activity and by a significant increase (P less than 0.05) in 5 alpha-reductase activity. However, LHRH treatment starting from day 66 had no significant effect on these testicular enzyme activities.

17-Hydroxysteroid Dehydrogenases↗
PubMed1986

Studies on 3-methoxy-4-hydroxyphenylglycol (MHPG) and 3,4-dihydroxyphenylglycol (DHPG) levels in human urine, plasma and cerebrospinal fluids, and their significance in studies of depression.

Both concentrations of total 3-methoxy-4-hydroxyphenylglycol (MHPG) and 3,4-dihydroxyphenylglycol (DHPG) in the human urine, plasma and CSF were determined with a high-pressure liquid chromatography with electrochemical detection in order to clarify the dynamic change in these noradrenaline metabolites. Three different biological fluids were collected simultaneously from 16 orthopedic patients who were regarded clinically as substitutes for normal subjects. In the urine, the MHPG concentrations were 1.67 +/- 0.65 micrograms/mg creatinine (mean +/- S.D.) and DHPG 0.39 microgram/mg creatinine +/- 0.21. The plasma levels were 21.16 ng/ml +/- 9.58 for MHPG, and 19.58 ng/ml +/- 8.13 for DHPG. The CSF levels of MHPG and DHPG were 24.08 ng/ml +/- 8.10 and 34.76 ng/ml +/- 11.46, respectively. The CSF levels of these metabolites were correlated significantly with those in the plasma (r = 0.852, p less than 0.001 for MHPG; r = 0.799, p less than 0.001 for DHPG), while no significant correlations were found between the urinary levels and either the plasma or CSF levels of these metabolites. In the urine, the MHPG levels were proportional to the DHPG levels, while the former were inversely proportional to the latter in the plasma or CSF. Neither the MHPG nor DHPG levels in the urine from depressed patients revealed to have any significant correlation with their clinical assessments using the Hamilton Rating Scale Score (HRS). The patients were treated with an antidepressant active selectively on the noradrenergic system, and no significant changes in urinary excretion of these metabolites were observed before and after the drug treatment. These findings suggest that in the case of psychiatric disorders such as depression, these compound levels in the plasma or CSF would provide more important information than those in the urine.

Adult↗
PubMed1986

Functional partial epilepsies in childhood.

Out of the 314 children with partial epilepsies below the age of 15 who had been followed for more than 5 years, 122 children with functional partial epilepsies (FPE) were the subjects of this study. The specific modality of interictal EEG findings reminiscent of that of the Rolandic spikes (Dalla Bernardina, 1982, 1984) was compared between functional and organic partial epilepsies. The results were: 1) One hundred and twenty-two patients were found to have FPE out of a total of 314 patients (39%). 2) Fifty-five patients were diagnosed as typical benign epilepsy of children with centro-temporal EEG foci (BECCT) of the 122 functional cases (45%). The remaining 67 patients who defied the diagnostic criteria of BECCT were; 9 cases with frontal EEG focus (7%), 11 cases with central and/or midtemporal EEG foci (9%), 10 cases with occipital EEG focus (8%) and 14 cases with multiple foci (11%). 3) Unfavorable seizure control was observed in cases with frontal foci (44%) and with multiple EEG foci (64%) compared with those whose EEG focus was located in the centro-midtemporal area, (including BECCT; 98%) and in the occipital region (80%). 4) It was noteworthy that the recurrent interictal spikes similar to those of the Rolandic spikes (Dalla Bernardina) were found in more than 50% of the patients not only with functional but with organic partial epilepsies. Our results, at least at the present time, appear to indicate that the recurrent spikes never did signify the benignancy of the seizure prognosis. The importance of differential diagnosis of BECCT from FPE was specifically stressed.

Brain↗
PubMed1986

A case of Sjögren's syndrome with valvular diseases.

The case of a 61 year old woman with Sjögren's syndrome with aortic and mitral stenosis is reported. She suffered from rheumatic fever at a young age. Physical and echocardiographic examinations showed findings of mitral and aortic valve stenosis. In addition, she had experienced xerostomia, a gritty sensation in the eyes and Raynaud's phenomenon. Blood examination showed hypergammaglobulinemia, positive rheumatoid factor, antinuclear and anti-Ro (SS-A) antibodies. The diagnosis of Sjögren's syndrome was confirmed by sialography and biopsy of the labial salivary gland. The combination of valvular disease and Sjögren's syndrome is rare and the etiological correlation is discussed.

Antibodies, Antinuclear↗
PubMed1986

[Long-term vasodilator therapy of chronic refractory heart failure in patients with dilated cardiomyopathy].

The effect of long-term vasodilator therapy (hydralazine, ecarazine or budralazine + isosorbide dinitrate) were evaluated for 20 patients with chronic congestive heart failure due to dilated cardiomyopathy (DCM) resistant to conventional therapy. There were 16 men and four women whose ages ranged from 30 to 74 years (mean 52 years). Fifteen patients were in NYHA class III, and five in class IV. All patients continued their previous therapeutic regimens during this study. Hemodynamic measurements were performed with a triple lumen flow-directed balloon-tipped catheter for 15 patients to evaluate the effects of vasodilator therapy. In the other five patients, heart rate, blood pressure, chest radiography for heart size (CTR) and M-mode echocardiography were monitored. The hemodynamic responses to the combined vasodilator therapy for 15 patients showed significant decreases in afterload and preload concomitant with an increase in cardiac output. The noninvasive evaluations of combined vasodilator therapy in five patients resulted in significant improvement in heart size and ejection fraction. In all 20 patients, symptoms were significantly improved. Side effects and drug toxicity were uncommon during vasodilator therapy. It is concluded that combined vasodilator treatment is the most ajunctive therapy for the management of severe refractory heart failure due to DCM. In addition, long-term nonparenteral vasodilators can be administered even in an outpatient clinic without hemodynamic monitoring.

Adult↗
PubMed1986

[Relations between neonatal heart rate variability and the behavioral state].

In sixty healthy newborn infants the relations between the neonatal heart rate variability (NHRV) and the behavioral state were investigated. The infants were divided to subsequent two subgroups according to the mode of delivery. One was normal vaginal delivery (N = 47), and the other was elective cesarean section (N = 13). R-R intervals less than 280 msec and more than 700 msec were excluded. The maximum difference in successive R-R intervals accepted was 60 msec. The standard deviation of R-R intervals as LTV index and the mean of absolute beat to beat difference as STV index were calculated with a minicomputer. The behavioral states were classified according to Prechtl's criteria. The LTV in state 2 and state 4 increased progressively and reached its maximum level on the third day after birth. The change of STV was neither consistent nor significant. In state 5, both the STV and the LTV were very low. The discriminant function gave percentages of correct classification of 85-100% for the active quiet states. The NHRV was similar in state 1 and state 3, and in state 2 and state 4 respectively. There was an increase in the LTV during the 24 hours after birth in the CS group. Thus, neonatal adaptation of CS differs from that of normal labor.

Adaptation, Biological↗