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Biomedical subjects

S Kusano

Publications and source records attributed to S Kusano.

At least 145 records · Page 8Linked to original sources

Mixed outbreak of Bordetella pertussis and Bordetella parapertussis in an apartment house.

From September through November of 1985, a mixed outbreak of Bordetella pertussis and Bordetella parapertussis occurred in an apartment house in Ashikaga City, Japan. Bacteriological and serological investigations were conducted on seven families, comprising 13 adults and 19 children, living in the same apartment house and having social contacts. For all the subjects, cultivation of nasopharyngeal mucus and measurement of pertussis agglutinin antibody, anti-PT antibody, and anti-F-HA antibody were performed. On the basis of the clinical, bacteriological or serological findings, seven children of three families (families A, B and C), including the first child patient (index case) of family A, were diagnosed as having infections caused by B. pertussis, or B. parapertussis or both. B. pertussis and/or B. parapertussis were isolated from six of the seven child patients. B. pertussis alone was isolated from three children (one in each family), and two of them had not been vaccinated. B. parapertussis alone was isolated from two children, while both bacteria were isolated from one child. Those three children from whom B. parapertussis was isolated were in family C, which was the last of the three families to develop symptoms of infection. Josamycin had been administered to two of the three children from whom B. parapertussis was isolated before the nasopharyngeal mucus specimen was collected. In one of the two children from whom only B. parapertussis was isolated, the significant elevation of anti-PT antibody titer was observed, which was indicative of a mixed infection with B. pertussis.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

Effects of reduced malto-oligosaccharides on the thermal stability of pullulanase from Bacillus acidopullulyticus.

We investigated the effects of the reduced malto-oligosaccharides, D-glucitol (G1-OH), maltitol (G2-OH), maltotriitol (G3-OH), maltotetraitol (G4-OH), and maltopentaitol (G5-OH) on the thermal stability of Bacillus acidopullulyticus pullulanase (EC 3.2.1.41). The thermal stability depended on the concentration of D-glucitol; after heat treatment for 90 min at 60 degrees in the presence of 0.56, 0.28, 0.14, or 0M G1-OH, the residual activity was 100, 80, 32, and 10% of the control, respectively. Stability increased with the number of glucosyl residues in the alditols added; the effects of G3-OH, G4-OH, and G5-OH on stability were remarkable. Addition of 30% G2-OH, G3-OH, and G4-OH also contributed to the thermal stability of the pullulanase immobilized onto chitosan beads treated with glutaraldehyde. A high concentration of G2-OH stabilized other debranching amylases, Klebsiella pneumoniae pullulanse, Bacillus sectorramus pullulanase, and Pseudomonas amyloderamosa isoamylase (EC 3.2.1.68) under heat treatment for 48 h at 60 degrees, as well as the pullullanase of B. acidopullulyticus.

Amylases↗

[Usefulness of assessing bone mineral content of cortical bone in patients with lingering imbalance of bone metabolism].

The CT numbers of cortex at the level of 20 cm (CT20) and of spongiosa in the lateral condyle at 2 cm (CT02) proximally from the distal end of the femur, and the bone mineral density of spongiosa in L3 body (BMD), were obtained by QCT. The study included 48 patients with rheumatoid arthritis or chronic renal failure as well as 10 healthy volunteers. The relationships of CT20 vs BMD in the regions above and below a critical value of BMD were quite different from each other. Similar relationships were observed in the plot of CT20 vs CT02. The results indicated that the demineralization of cortex was much less than that of spongiosa while the mineral content of spongiosa kept higher than a critical value, but the demineralization of cortex surpassed that of spongiosa once the mineral content of spongiosa had become lower than the critical value. It is necessary to assess bone mineral content of cortex especially in patients with lingering imbalance of bone metabolism.

Adult↗

Altered synthesis of renin in patients with insulin-dependent diabetes: plasma prorenin as a marker predicting the evolution of nephropathy.

Plasma active renin (PARC) and plasma total renin (PTRC) were measured in 72 patients with childhood-onset IDDM and 37 control subjects in the supine posture. The diabetic patients were divided into three groups: group A, 55 patients with normoalbuminuria; group B, 11 patients with microalbuminuria; and group C, 6 patients with overt proteinuria. The levels of PTRC were 125 +/- 51, 240 +/- 124 and 580 +/- 285 ng/l in groups A, B and C, respectively; all of which were significantly higher than 114 +/- 33 ng/l in the control subjects. On the other hand, the ratios of plasma active to total renin, ARC/TRC, were 18.1 +/- 12.5, 10.7 +/- 6.7, and 2.9 +/- 1.4% in groups A, B and C, respectively; all of which were in turn significantly lower than 24.8 +/- 8.7% in the control subjects. Among the diabetic groups, PTRC became higher and ARC/TRC became lower in conjunction with the degree of albuminuria. The acute increments of PARC and PTRC during a standing load test were subsequently observed in 7 patients of group A, 5 of group B, 4 of group C, 13 patients with non-diabetic glomerulonephritis, and 6 control subjects. The ratios of increments of PARC to that of PTRC, delta ARC/delta TRC, were 48.3 +/- 22.3, 35.1 +/- 10.4 and 8.4 +/- 8.1% in groups A, B, C, respectively; all of which were significantly lower than 84.2 +/- 48.6% in the control subjects. Patients with non-diabetic glomerulonephritis showed, to a lesser degree, low ratio of delta ARC/delta TRC (60.4 +/- 37.9%) in conjunction with higher level of PTRC (249 +/- 89 ng/l).(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗

Hepatic inferior vena cava obstruction: treatment of two types with Gianturco expandable metallic stents.

Gianturco expandable metallic stents were used for treating six patients with inferior vena cava (IVC) obstruction due to compression by large hepatic tumors and three patients with idiopathic obstruction of the hepatic IVC and Budd-Chiari syndrome who showed reocclusion or stenosis 3-21 months after previously performed percutaneous transluminal angioplasty (PTA). In all six patients with compression by hepatic tumors, stents dilated the IVC and debilitating edema of the lower body disappeared. In the three patients with idiopathic obstruction, stents were placed after repeat dilation of the lesions and Budd-Chiari syndrome did not recur during a follow-up period of 7-10 months. In two of the three, cavograms obtained 8 months after placement showed the channels to be open with minimal intimal thickening. Gianturco expandable metallic stents can correct IVC obstruction due to compression by hepatic tumors and are useful in preventing reocclusion of the IVC after PTA for the treatment of idiopathic obstruction. The authors recommend using tanem stents connected by at least two struts.

Aged↗

[A case of multiple intrahepatic portosystemic venous shunts associated with multiple hemangioma-like lesions of the liver].

Intrahepatic portosystemic venous shunts (IPVS) are rare, except for the minute ones observed in cirrhotic liver. This report concerns a case with frequent episodes of consciousness loss, diagnosed as IPVS and multiple hemangioma-like lesions of the liver by US, CT and angiography. To our knowledge, this is the first report of association of IPVS and such angiographically evident hemangioma-like lesions of the liver. The etiology of IPVS is mostly considered to be congenital though, there are still many arguments about it. The relation between IPVS and the hemangioma-like lesions of the liver is discussed.

Adult↗

[A case of congenital sinus of Valsalva-right ventricule fistula].

A 58-year-Old male was admitted to our hospital because of heart murmur. This heart murmur had been first noticed when the patient was 7 years old, but he had no other symptoms. Color Doppler echocardiography and aortography showed that there was no deformity in the sinus of the Valsalva or in the connection to the right ventricle. Data of cardiac catheterization revealed that the shunt rate was 57% and Qp/Qs was 2.35. He was diagnosed as having congenital fistula of the Valsalva sinus to the right ventricle and an operation was recommended.

Aortic Diseases↗

[Two cases of bronchiolitis obliterans organizing pneumonia, showing multiple infiltrative shadows, diagnosed by open lung biopsy, and a report of their BAL findings].

Two cases of bronchiolitis obliterans organizing pneumonia (BOOP) were diagnosed by clinical features and pathological findings of open lung biopsy specimens. Findings of repeated (bronchoalveolar lavage (BAL) fluid analysis were also reported. Case 1 was a 54 year-old woman complaining of dry cough and low grade fever. Multiple infiltrative shadows in both lung fields were pointed out on her chest roentgenogram. Case 2 was a 68 year-old woman with symptoms of cough, sputum and low grade fever. Her chest X-ray films also showed multiple infiltrative shadows bilaterally. Although various antibiotics were given to both patients, new shadows appeared on their chest films without any improvement of clinical symptoms or inflammatory findings. TBLB specimens obtained from the two cases showed the findings of organizing pneumonia. In each case, open lung biopsy was performed, and the pathological diagnosis was consistent with BOOP. However, exclusion of the possibility of eosinophilic pneumonia and lymphoproliferative disorders of the lung was somewhat difficult in case 1. BALF analysis showed an increased number of lymphocytes in both cases, 75% and 37% respectively. The inverted ratio of OKT4/OKT8 (0.71) in BALF of case 1 was similar to that of hypersensitivity pneumonitis. In spite of clinical and roentgenological improvement after steroid therapy, the abnormal BAL findings still remained. Therefore it is suggested that BAL may be a useful tool for monitoring the steroid treatment of patients with BOOP.

Aged↗

Central effect of aprotinin, a serine protease inhibitor, on blood pressure in spontaneously hypertensive and Wistar-Kyoto rats.

We examined the effect of centrally administered aprotinin, a serine protease inhibitor, on blood pressure (BP) in conscious spontaneously hypertensive rats (SHR) and Wistar-Kyoto rats (WKY). Twenty-two gauge needles and polyethylene catheters were implanted into lateral cerebroventricle and femoral artery, respectively, at 48 hours before the experiments. In Group 1 (8 SHR, 6 WKY), rats received a bolus intracerebroventricular injection (i.c.v.) of aprotinin (1,000 KIU/kg/10 microliters). A prompt increase of BP was observed in SHR after aprotinin and this elevation of BP was persisted for over 30 minutes (mean BP: 158.8 +/- 2.9 mmHg at control to 168.7 +/- 3.2 at 15 min., p less than 0.01; to 168.3 +/- 3.4 at 30 min., p less than 0.01). On the other hand, BP of WKY decreased gradually after aprotinin (mean BP: 143.0 +/- 3.3 at control to 136.8 +/- 2.7 at 15 min., n.s.; to 134.2 +/- 5.1 at 30 min., p less than 0.05). The intravenous injection (i.v.) of aprotinin (Group 2: 7 SHR, 5 WKY) and the i.c.v. of artificial cerebrospinal fluid (CSF) (Group 3: 5 SHR, 6 WKY) did not affect BP in both SHR and WKY except for the minor transient increase of BP in WKY immediately after artificial CSF i.c.v.. We performed additional experiments to study the contributions of sympathetic nervous system and vasopressin to these changes in BP.(ABSTRACT TRUNCATED AT 250 WORDS)

Animals↗

[Establishment of primary culture of cells derived from human uterine endometrium].

A culture of cells derived from the endometrium was established to study in vitro the effects of hormone on the endometrium. Endometrial tissue was cut into small pieces and suspended in trypsin and collagenase-containing medium. The primary cell culture was obtained by six passages. The following observations appeared to indicate that the cultured cells consisted of endometrial epithelium-derived adenocytes, endometrial stromal cells and fibroblasts: 1. The epithelium-derived adenocytes and the endometrial stromal cells were positive and the fibroblasts were negative for staining with keratin by the enzyme-labelled antibody method. 2. Transmission electron microscopic observation revealed microvilli on the surface of the adenocytes, abundant free ribosomes in the cytoplasm, and nucleoli in distinct nuclei whose margin was deeply stained. Junction complexes among the cells were also observed. There were no microvilli on the surface of the endometrial stromal cell. Filaments, mitochondria and secreting granules were distinctly seen in the cytoplasm. The adenocytes on the margin of the nucleus itself were more deeply stained, and the margin was notched. The fibroblasts were spindle-shaped, and there no basement membrane structure laterally along the surface of the fibroblast. There were no intercellular junction complexes but there were filaments in the intercellular borders and in the cytoplasm. Chromatin in the large oval nuclei was dispersed.

Adult↗

[Pharmacokinetics and clinical studies on cefsulodin in neonates].

Pharmacokinetics and clinical studies on cefsulodin (CFS) were conducted in neonates. 1. MIC's of CFS, sulbenicillin and gentamicin (GM) were determined using 7 strains of Pseudomonas aeruginosa clinically isolated from neonates and maintained as stock cultures. CFS was found to be nearly as active as GM. 2. When CFS 20 mg/kg was administered to a 12-day-old neonate by intravenous bolus injection, serum concentrations were 8.7 micrograms/ml before administration and 51.7 micrograms/ml at 30 minutes, 44.4 micrograms/ml at 1 hour, 38.6 micrograms/ml at 2 hours and 11.1 micrograms/ml at 6 hours after administration. The half-life was 2.5 hours. 3. CFS was administered alone or combination with other drugs to 3 neonates. The drug was clinically effective in 2 cases and slightly effective in another. Bacteriologically, one case was rated as decreased, another as replaced, and the remaining one as unchanged. 4. Neither side effects nor abnormal laboratory values attributable to CFS were found.

Cefsulodin↗

[The hepatic hemodynamic response to intra-arterial infusion of vasoactive agents--Part 2. Blood flow measurements in rats with liver cancer].

The tissue blood flow (TBF) of primary liver cancer and normal live in 54 rats were measured following infusion of vasoactive agents into the celiac axis under continuous recording of blood pressure. Angiotensin II (AT) (1.0 micrograms/kg/min) and Prostaglandin F2 alpha (PGF) (1.0 micrograms/kg/min) were used. The former increased TBF of the tumor and blood pressure and the latter reduced TBF of the tumor with no remarkable change of the blood pressure, but both drugs made little or no influence on TBF of the normal liver. Dibutyryl cyclic AMP (DBcAMP) (2.0 mg/kg/hr) infusion increased TBF of the both tumor and normal liver with no significant change of blood pressure. PGF (1.0 micrograms/kg/min) infusion after preinfusion of DBcAMP did not cause the decrease of TBF of the tumor.

Angiotensin II↗

[The hepatic hemodynamic response to intra-arterial infusion of vasoactive agents--Part 1. Blood flow measurements in dogs].

The common hepatic arterial (CHA), portal venous (PV) and liver tissue (LT) blood flows were measured during continuous infusion of vasoactive agents to the celiac axis under the observation of systemic circulation. The infusions of Angiotensin II (AT) (0.05 microgram/kg/min) and Prostaglandin F2 alpha (PGF) (0.025-0.05 microgram/kg/min) reduced CHA and LT blood flow, but caused no remarkable change of PV blood flow. The infusions of AT (0.5 microgram/kg/min) and PGF (0.5 microgram/kg/min) caused a biphasic response in CHA blood flow: an initial decrease in CHA blood flow was followed by a marked increase in this parameter (p less than 0.05), while PV blood flow decreased, but LT blood flow remained unchanged. The infusion of PGF (1.0 microgram/kg/min) reduced all parameters of CHA, PV and LT blood flows. The infusion of Dibutyryl cyclic AMP (DBcAMP) (2.0 mg/kg/hr) increased all parameters of CHA, PV and LT blood flows. Preinfusion of DBcAMP weakened the primary effects of PGF (1.0 microgram/kg/min) infusion.

Angiotensin II↗

[Combination chemotherapy using cyclophosphamide, adriamycin, and cisplatin in recurrent or advanced endometrial cancer--a preliminary report].

Four patients with recurrent or advanced endometrial cancer have undergone combination chemotherapy with Cyclophosphamide, Adriamycin and Cisplatin (CAP). All drugs were administered by I.V. on day 1 in the following doses: Cyclophosphamide 500 mg/m2, Adriamycin 50 mg/m2 and Cisplatin 50 mg/m2. The treatment was repeated every 4 weeks and continued as long as there was disease progression. Two complete clinical responses and two partial responses were achieved. Based on these good results, we have initiated post-operative prophylactic chemotherapy using CAP in high risk patients. Adverse effects including myelo-suppression, nausea, and vomiting, and alopecia were seen in almost all patients. In no case, however, did any patient experience life-threatening toxicity. Based on our experience, CAP therapy appears tolerable when used per our schedule.

Adenocarcinoma↗

Orthostatic hypertension due to coexistence of renal fibromuscular dysplasia and nephroptosis.

A 42-year-old woman presented with orthostatic hypertension. Increased plasma renin activity was noted and blood pressure rose gradually with standing. Selective renal arteriography indicated narrowing of the distal portion of the right renal artery and poststenotic dilatation and signs of arterial stenosis due to fibromuscular dysplasia. Greater arterial narrowing resulted from tortion due to nephroptosis brought about by excessive renin secretion. Thus, both renal arterial stenosis and nephroptosis were considered responsible for the present orthostatic hypertension. Percutaneous transluminal renal angioplasty was found very effective for normalizing standing blood pressure and renal blood flow.

Adult↗

[Acute epidural hematoma of the posterior fossa in a case of von Willebrand's disease].

A rare case of acute epidural hematoma of the posterior fossa associated with von Willebrand's disease is reported. A 9-year-old boy fell down and hit his occipital region against a floor. Soon after he came home and slept, but three hours later he began to vomit and became drowsiness. He visited our hospital and his Glasgow Coma Scale showed 13 points. CT scan on admission showed acute epidural hematoma of left posterior fossa and contusional hematoma in the right temporal lobe. The bleeding time was over 18 minutes. He had been suspected to be suffering from von Willebrand's disease two years ago. Then fresh blood, fresh frozen plasma and anti-hemophilic globulin were prepared. Ten hours after injury, the operation was begun. Fresh epidural hematoma existed as a clot beyond transverse sinus. During the procedure of dural tenting suture, diffuse bleeding from bone, muscle, subcutaneous tissue and dura occurred and it was difficult to stop the bleeding. By using fresh blood and anti-hemophilic globulin, the bleeding was controlled, and then the operation was achieved. In the postoperative course a new epidural hematoma was found in the left temporal region and a new but asymptomatic retinal hemorrhage was found in his right eye. He was discharged without any neurological deficits 25 days after operation.

Acute Disease↗