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Biomedical subjects

M Adachi

Publications and source records attributed to M Adachi.

At least 613 records · Page 34Linked to original sources
PubMed1989

[A study on the physical effects of short-time recreation activities at a hot spring resort on unhealthy middle-aged workers].

A pilot study to improve unhealthy life habits of thirty middle-aged male clerical workers (45 +/- 3.58 yr.) with mild health disorders such as hypertension, hypercholesterolemia, diabetes mellitus and fatty liver was carried out. Under prohibition of smoking and alcohol intake, they spent five nights and six days at a hot spring resort, taking part in planned health training programs which included aerobic training, hiking in forests, hot spring baths, cooking practice and lectures about healthy life, controlled by medical, dietary and physical training staffs. To evaluate the short-term effects of these activities, body weight, blood pressure, serum lipid (total cholesterol, high-density-lipoprotein cholesterol, triglyceride, total free fatty acid and phospholipid), blood sugar, uric acid, gamma-glutamyl transpeptidase (gamma-GTP) and glutamic-oxaloacetic transaminase (GOT) were examined early in the morning of the second (before) and the fifth (after) days, and then their impressions of these recreation activities were monitored by questionnaires on the sixth day. By t-tests of all before-and-after data, it was shown that mean values of body weight, systolic blood pressure, high-density-lipoprotein cholesterol, triglyceride, phospholipid and gamma-GTP were improved, but fasting blood sugar, uric acid and GOT were not improved. In comparison of blood pressure levels, the hypertensive group (n = 9) showed lowering in both systolic and diastolic blood pressure, though the normal group (n = 10) had slight elevation. In addition, in the hypercholesterolemic group (n = 11, greater than or equal to 220 mg/dl) mean total cholesterol values decreased, conversely in the hypocholesterolemic group (n = 6, less than 180 mg/dl) they increased. Moreover, the obese group (n = 15, obesity index greater than or equal to 120%) showed greater decreases of body weight, triglyceride and phospholipid than the non-obese group. From questionnaires, it was confirmed that through these recreation activities most participants found mental and spiritual satisfaction, in spite of heavy physical loads. The short-term recreation activities under a stressless environment seemed to maintain the function of homeostasis in the body, but further investigation is needed to examine the relation between the contents of diets and physical activities, and to follow the long-term effects on the participants.

Adult↗
PubMed1989

[Changes of alveolar macrophage plasminogen activator in rats exposed to nitrogen dioxide].

In order to clarify the role of nitrogen dioxide (NO2) in the development of lung injury, male Wistar rats were exposed continuously to 0.3 or 5.0 ppm NO2 for 10, 20, 30, 60 and 90 days, and alveolar macrophages and lavage fluid obtained by bronchoalveolar lavage were examined. The results were as follows: 1) The number of alveolar macrophages increased significantly in response to NO2 exposure. Throughout the whole test period, the largest number was obtained in the group exposed to 5.0 ppm, followed by the group exposed to 0.3 ppm, and then by the control group. 2) The plasminogen activator (PA) released from alveolar macrophages was increased dose-dependently by NO2 exposure. The activities were significantly high in the groups exposed for 10 to 20 days at each concentration, and then slightly decreased at 30 days. Thereafter, activity showed a tendency to increase, reaching the maximum level on the 60th day of exposure. 3) Similarly, the fibrinolytic activity in the lavage fluid was increased dose-dependently by NO2 exposure. The maximum activity was noted on the 10th day of exposure, followed by a rapid decrease up to the 30th day, and a slight rise again between the 60th and 90th day. 4) In the group exposed to 5.0 ppm NO2, total protein in the lavage fluid increased, and the elastase inhibitory capacity (EIC) per milligram of protein decreased. In the group exposed to 0.3 ppm NO2, however, no difference from the control group was noted. These results revealed that the alveolar macrophages were affected and increased PA activity as a result of exposure to as little as 0.3 ppm NO2. This was shown to result in an increase of the fibrinolytic activity in the alveoli, leading to damage to the lung tissue. This evidence may explain the morphological findings of the appearance of emphysematous change in the lungs of rats exposed to low levels of NO2. For the detection of the effect of NO2 on the lung tissue, PA appears to be a more sensitive indicator than EIC.

Animals↗
PubMed1989

[Assessment of endoscopic embolization in the management of esophageal varices].

Between February 1984 and September 1987, endoscopic embolization (EE) was performed in 26 patients with esophageal varices. The effects of EE were evaluated with endoscopic findings according to the general rules for recording endoscopic findings on esophageal varices as specified by the Japanese Research Society for Portal Hypertension. 1) When the result was regarded as effective if a patient had Cw, F1, R-C sign (-), Li and Lm or disappearance of varices, the improvement was found in 66.7% for Color, 79.2% for R-C sign, 54.2% for Form and 45.8% for Location after EE. 2) Recurrence of varices was found in 50% of the patients (12/24) and 4 of 12 cases (33.3%) had rebleeding. 3) When the endoscopic findings before and after EE were compared between relapsed and unrelapsed cases, relapsed patients had more unfavorable endoscopic findings, furthermore, the extent of improvements was also worse than that of unrelapsed cases. 4) As complications, slight fever, dysphagia and epigastric pain were found in most cases, however, all were cured conservatively. In conclusion, EE is useful and safety tool for the improvement of endoscopic findings of the patients with esophageal varices.

Adult↗
PubMed1989

[Self-setting apatite cement. 6. Possibility as bone substitute].

Self-setting apatite cement was investigated to evaluate its use as a possible bone substitute in the rat femur. The implant sites were recovered at intervals up 12 weeks postoperatively and investigated by the use of x-ray diffraction, contact microradiography, light and electron microscopy. By x-ray diffraction analysis, the cement placed for at least one day in the medullary canal of rats was found to be completely converted to a set phase of hydroxyapatite resembling the main inorganic phase of bone. In any specimens prepared at 1, 4, 12 weeks after implantation, no appreciable foreign body response was observed in the tissue around the set cement. At four weeks after implantation the set cement was in tight contact with the newly formed bone which appeared to involve osteocytes in lacunae and osteoblastic cells on its surface. At twelve weeks after implantation, the newly formed bone tended to grow into the interior of the set cement. With scanning electron microscopy, the newly formed bone was found to be directly deposited on the set cement. The newly formed bone consisted of fine needle-like crystals. These results strongly suggest that this cement is well tolerated by bone tissue and osteogenesis when used as a bone substitute. The advantage of the present material as a promising bone substitute is that it can be filled in surgical or traumatic bone defect as a slurry or paste.

Animals↗
PubMed1989

[The changes in plasma histamine levels after a sulpyrin inhalation test in asthmatic patients].

A sulpyrin inhalation test was given to 13 patients with aspirin-induced asthma (AIA) and 8 patients with non-aspirin-induced asthma (non-AIA) to observe the changes in plasma histamine levels before and after challenges. The respiratory function (FEV1.0) was measured before and after sulpyrin inhalation. A decrease of more than 20% the initial value (basal value) was defined as a positive response. Plasma histamine was determined by high-performance liquid chromatography (HPLC). In 11 patients with AIA, a positive response was observed (SIT positive), with a fall of FEV1.0 to 63.70 +/- 4.87% of the basal value. In 2 patients with AIA and 8 patients with non-AIA, no positive response was observed (SIT negative). In patients with SIT positive, plasma histamine levels increased significantly from 0.61 +/- 0.06 ng/ml before challenges to 1.34 +/- 0.22 ng/ml after challenges (p less than 0.01). No significant changes of plasma histamine occurred in the SIT negative patients. These results suggest that mast cells play some role in the mechanism of the development of aspirin-induced asthma.

Adult↗
PubMed1989

[Influence of surface properties on the bending strength of OPTEC porcelain].

Influence of properties on bending strength of OPTEC porcelain, an experiment on four-point bending test was studied using four kinds of specimens (5 X 3 X 20) made of OPTEC porcelain (INCISAL) each of which was surface-treated; (1) glaze firing (no treatment) (2) polishing by emery paper #150 (3) polishing by alumina powder (0.3 microns) (4) glaze firing after polishing by emery paper #150 The test specimens were immersed in distilled water maintained at 37 +/- 1 degrees C broken into four-point bending at 1.0 mm/min, and their bending jig had on inner and outer span of 5 mm and 15 mm. The specimens graze fired after polishing had the highest bending strength, of 914 kg/km2, those polished with alumina powder, 831 kg/cm2, those graze 763 kg/cm2, and those polished with emery paper 705 kg/cm2. In conclusion, the bending strength of the porcelain was decreased by the surface roughness.

Dental Porcelain↗
PubMed1989

[Self-setting apatite cement. 8. Dissolution and remineralization behavior of 45Ca-apatite cement].

Self-setting apatite cement hardens into a mass of single phase apatite when mixed with diluted phosphoric acid. Structurally this mass consists of two types of apatite, i.e. the seed apatite used as a setting accelerator and the matrix apatite formed afterward in the reaction of dicalcium phosphate dihydrate (DCPD) and tetracalcium phosphate (Te-CP). To investigate the dissolution behavior of self-setting apatite cement in detail, two types of 45Ca labeled apatite cement were prepared. In one, the seed apatite was labeled with 45Ca (45Ca-HAp cement) and in the other the matrix apatite was labeled with 45Ca through use of 45Ca-DCPD (45Ca-DCPD cement). Solubility, estimated from the concentration of 45Ca released in 1 mM of organic acid (e.q. acetic, lactic, or citric acid) with initial pH adjusted to 4.0 at 37 degrees C, was approximately zero for 45Ca-HAp cement, whereas the solubility of 45Ca-DCPD cement was approximately the same as unlabeled cements used so far. This finding suggests that dissolution of the matrix apatite governs dissolution of the set cement, though comparison of X-ray diffraction patterns and electron micrographs of the seed apatite and apatite in the set cement showed no essential difference in crystallinity and crystal shape. The fact that the matrix apatite was formed by enveloping the seed apatite may account for the preferential dissolution of matrix apatite. In synthetic saliva labeled with 45Ca having a degree of supersaturation with respect to apatite comparable to rest saliva, 45Ca concentration in solution decreased once the cement pellet was introduced.(ABSTRACT TRUNCATED AT 250 WORDS)

Apatites↗
PubMed1989

Juxtaposition of human bcl-2 and immunoglobulin lambda light chain gene in chronic lymphocytic leukemia is the result of a reciprocal chromosome translocation between chromosome 18 and 22.

The human bcl-2 gene is a oncogene candidate which is involved in the t(14;18) translocation specifically associated with follicular and diffuse B cell lymphomas. This translocation deregulates bcl-2 gene expression by placing it into immunoglobulin heavy chain locus (IgH). We have recently reported a case of chronic lymphocytic leukemia (CLL 1446) carrying a unique bcl-2 gene rearrangement with the immunoglobulin lambda light chain (Ig lambda) gene. This juxtaposition of the bcl-2 and Ig lambda genes resembles a variant chromosome translocation in Burkitt's lymphoma, although karyotype data of CLL 1446 is not available. In this paper, we completed the structural analysis of the bcl-2/Ig lambda gene rearrangement in CLL 1446 by cloning the corresponding partner of the rearrangement. This revealed that the juxtaposition of the bcl-2 and Ig lambda genes is a result of a reciprocal chromosome translocation between chromosomes 18 and 22 with deletions of 2 and 15 bp, respectively. Although a conserved immunoglobulin recombination signal (7mer-9mer) was absent around the breakpoint on chromosome 18, nonamer-like sequence was recognized within the deleted region at the breakpoint on chromosome 22. No extranucleotide was associated with both joining sites of the t(18;22) translocation. This is in sharp contrast to the t(14;18) translocation involving IgH locus in which the presence of extranucleotides is common and correlates well with the presence and absence of extranucleotides on V-(D)-J joining of IgH and light chain (L) genes, respectively. The data together suggest that the mechanism responsible for the physiological rearrangement of immunoglobulin genes is involved in this translocation.

Base Sequence↗
PubMed1989

[The effect of a selective 5-lipoxygenase inhibitor, AA-861 on airway hyperresponsiveness induced by ozone exposure in dogs].

To determine whether 5-lipoxygenase products are involved in hyperresponsiveness induced by ozone exposure, we studied the effect of a selective 5-lipoxygenase inhibitor, AA-861 on ozone-induced airway hyperresponsiveness in six dogs. Airway responsiveness to methacholine was measured by modified Astograph (7 Hz oscillation method) before and after ozone exposure, and TxB2 in plasma and in BALF, 6-keto-PGF1 alpha in BALF, numbers of neutrophils in the peripheral blood and differential cell counts in BALF were measured before and after ozone exposure. Ozone exposure was carried out for 2 hr at an ozone level of 3.04 +/- 0.01 ppm (mean +/- SE). There was a significant increase in airway responsiveness to methacholine after ozone exposure in the six dogs (p less than 0.01), and the numbers of neutrophils in the peripheral blood and the neutrophil counts in BALF increased significantly after ozone exposure (P less than 0.01). A selective 5-lipoxygenase inhibitor, AA-861 significantly inhibited the increase of airway responsiveness to methacholine induced by ozone exposure (p less than 0.05), and furthermore, the increase in the numbers of neutrophils in the peripheral blood and the neutrophil counts in BALF after ozone exposure were significantly inhibited by pretreatment with AA-861 (p less than 0.05). There was no significant change in the levels of TxB2 in plasma or in BALF, and also no apparent change in the levels of histamine was observed in BALF after ozone exposure. The levels of 6-keto-PGF1 alpha in BALF decreased after ozone exposure, but the decrease was not significant. These results suggest that 5-lipoxygenase products play an important role in the development of airway hyperresponsiveness and in the infiltration of neutrophils into the airway after ozone exposure in dogs.

Animals↗
PubMed1989

[Clinical evaluation of fluconazole in patients with mycotic infection].

Fluconazole, a triazole antifungal agent newly developed by Pfizer Inc.. was given orally to 4 patients with deep mycosis. Fluconazole was markedly effective against septicemia due to Candida and oral candidiasis accompanied with lingual ulcer in spite of seriousness of these underlying disease. In 2 patients with aspergilloma, eradication or contraction of fungus ball was observed and the drug was judged to be effective. In vitro MICs of fluconazole against clinically isolated Aspergillus spp. were much higher than its serum levels leaving a large discrepancy between in vitro activity and clinical efficacy. Although the dosage was 100-300 mg daily for 8 days to 6 months, neither adverse reactions nor laboratory parameter abnormalities were observed. The above results suggest that fluconazole is a useful agent in the treatment of fungal infections.

Adult↗
PubMed1989

[Study of development of autoantibody to beta-adrenergic receptors in asthmatics].

An (125I) iodohydroxybenzyl pindolol (125IHYP) binding inhibition assay was performed. Various dilutions (1:5-1:500) of sera from asthmatics and controls were incubated with canine lung membranes for 60 minutes at 30 degrees C. 125IHYP was added to the membranes for 30 minutes at room temperature in the presence and absence of 10 microM 1-propranolol, and the samples were washed through a Gelman (Type A-E) glass fiber filter using a washing buffer. Radio activity was measured with Aloka gamma counter. In the presence of various serum dilutions from asthmatics, 125IHYP specific bindings of 0.16 fmol to 4.38 fmol were measured. 125IHYP binding was inhibited in a dose-related and nonspecific manner. Serum, albumin, L-histidine and L-cysteine also inhibited 125IHYP specific binding to beta-receptors. Percentages of inhibition of serum from asthmatics on 125IHYP specific finding to beta-receptors were -17.6% to +9.3%, which were compared with identical dilutions of control serum. There was no significant difference in 125IHYP binding inhibition assay between asthmatics and controls. From these results, development of autoantibody to beta-adrenergic receptors could not be detected in this study.

Animals↗
PubMed1989

[A case of intra-arterial infusion chemotherapy in small cell lung cancer with liver metastases].

A 53 year old male was admitted with cough, chest pain and bloody sputa for one month. His admission chest radiography revealed a tumor shadow in right hilus. The patient was diagnosed as small cell lung cancer (oat cell type) by transbronchial biopsy. Clinical staging was IIIA and performance status was 1. The patient was treated by combined chemotherapy (CPA, ADM and VCR) for 3 courses and chest irradiation (5,000 rad). After such therapy, the primary site was regressive until 2 months prior to death. One month after irradiation, abdominal CT showed multiple liver metastases. Though CDDP 100 mg/body and etoposide 100 mg/body X5 were administered systemically, improvement of metastases of the liver was not revealed by abdominal CT. However, after hepatic arterial infusion of ADM (10 mg/body) suspended in a lipiodol (3 ml/body) and CDDP (100 mg/body) was performed, liver metastases were remarkably regressive by abdominal CT. The patient died of a systemic relapse about 14 months after liver involvement.

Antineoplastic Combined Chemotherapy Protocols↗
PubMed1989

[Ozone-induced airway hyperresponsiveness in guinea pigs].

We studied the time related changes of airway hyperresponsiveness induced by ozone inhalation (2.9 ppm, 30 min) in guinea pigs. In unanesthetized and spontaneously breathing guinea pigs, the respiratory resistance was measured by a forced oscillation technique. The respiratory resistance and respiratory frequency were unchanged until 24 hours after ozone inhalation. In mechanically ventilated guinea pigs, airway responsiveness to inhaled methacholine was determined using a modification of the Konzett-Rössler technique, and after methacholine challenge bronchoalveolar lavage (BAL) was performed for cell yield. At 1 hour and 3 hours after ozone inhalation, airway responsiveness was increased significantly, but returned to the control level at 6 hours. In the BAL fluid, there was a significant increase in neutrophils at 3 hours after ozone inhalation and thereafter. In the separated groups, before air or ozone inhalation, human serum albumin (HSA) was administered intravenously, and BAL was performed 1 hour after inhalation. In the ozone inhalation group, the concentration of HSA in BALF was increased significantly compared to the air inhalation group. These results suggest that airway hyperresponsiveness induced by ozone inhalation may occur before the influx of neutrophils into the airways and may depend on some structural changes such as submucosal and mucosal edema induced by the enhancement of capillary permeability.

Air Pollutants↗
PubMed1989

[Clinical study on two cases of progressive systemic sclerosis with anti Wa antibody].

It is well known that patients with progressive systemic sclerosis (PSS), as well as other autoimmune disease, have various kinds of autoantibodies. We presented two PSS patients with anti Wa antibody, which had recently been reported as a new anti cytoplasmic antibody in only one case with PSS. Our first case, 49 years old female had clinical features of arthralgia, Raynaud's phenomenon, sclerodactyly, transient myalgia and sicca complex. Her laboratory findings showed hypergammaglobulinemia (1.9 g/dl), positive RAHA (1: 640) anti Wa antibody (1: 256), and anti SS-A antibody (1: 256). Second case, 64 years old female had also clinical features of Raynaud's phenomenon, sclerodactyly, dysphagia, dyspnea on exertion and dry mouth. Furthermore lung fibrosis and dysmobility of upper GI tract were observed. FANA (1: 20) was detected as nucleolar pattern, and the titer of anti Wa antibody was 1: 64. Clinical findings of myositis were not seen in both cases. This study suggested that anti Wa antibody might be one of the diagnostic marker on PSS.

Autoantibodies↗
PubMed1989

Induction of bronchial hyperresponsiveness by Bordetella bronchiseptica infection in dogs.

Six beagles were examined for time-related changes of bronchial responsiveness to methacholine, plasma histamine and thromboxane B2, and biopsy of bronchial tissues after intratracheal injection of Bordetella bronchiseptica. A progressive increase in bronchial responsiveness was induced after injection. The mediators, however, did not elevate and tissue neutrophil counts did not correlate with increased airway hyperresponsiveness. Intratracheal injection of heat-killed Bordetella bronchiseptica produced no alteration in these parameters. Thus, it is speculated that airway epithelial damage and effects on ciliostatic function induced by the organism are primarily involved in the pathogenesis.

Animals↗
PubMed1989

[Identification of nontuberculous mycobacteria isolated from clinical materials and some comments on it].

Six mycobacterial strains which were isolated and identified with some suspicions in five hospitals in Japan were retested for their biological and biochemical characteristics for correct identification at the Department of Microbiology and Immunology, Shimane Medical University. One strain originally classified as Group IV Mycobacterium, and two unidentified strains were presently identified as Mycobacterium nonchromogenicum complex. Two strains originally identified as M. xenopi were identified by us as M. szulgai and M. avium complex, respectively. Finally, one strain originally identified as M. phlei was identified by us as M. fortuitum. In these cases, inexactly controlled examinations for growth rate, growth at 45 degrees C, Tween 80 hydrolysis, and pigment production or lack of tests for certain key characters of a given organism seemed to be main causes of initial incorrect identification.

Bacteriological Techniques↗
PubMed1989

Ultrastructural analysis of megakaryoblasts by simultaneous detection of platelet peroxidase and platelet glycoproteins.

We studied the phenotype of megakaryoblasts (MKB) in two patients with blastic crisis of chronic myeloid leukemia by simultaneous detection of platelet peroxidase (PPO) activity and platelet glycoproteins (GP) with monoclonal antibodies at the ultrastructural level. When 227A (anti-GPIb) was used, the finding of GP correlated well with the presence of PPO in the majority of MKB, and a few MKB were found to express PPO but lack GP. When 224B (anti-GPIIb/IIIa) was applied, we found a few MKB of a further type, which expressed GP but lacked PPO. These results indicate that the expression of platelet markers is partially aberrant in neoplastic MKB, and that MKB are heterogenous in their phenotypic expressions. Thus, the detection of PPO or GP alone may miss some MKB. For the accurate identification of MKB and the demonstration of aberrant expression of platelet markers, simultaneous detection of the markers seems to useful.

Blast Crisis↗