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Biomedical subjects

H Isobe

Publications and source records attributed to H Isobe.

At least 109 records · Page 6Linked to original sources
PubMed1990

Decreased proapolipoprotein A-I processing in liver disease: evidence for hepatic participation in proapolipoprotein A-I conversion.

We evaluated the proapolipoprotein A-I (proapo A-I)-converting activity to clarify the pathogenesis of the high proapo A-I/apo A-I ratio in the high-density lipoprotein (HDL) from patients with acute hepatitis and liver cirrhosis. The serum proapo A-I-converting activities were measured using 3H-labeled proapo A-I. 3H-labeled proapo A-I was purified from the media of cultured Hep G2 cells by immunoaffinity chromatography. The serum proapo A-I-converting activities were found to be significantly reduced in the patient with liver cirrhosis (140 +/- 53 dpm/ml per h) or acute hepatitis (140 +/- 48 dpm/ml per h) compared to normal subjects (315 +/- 32 dpm/ml per h). Serum proapo A-I-converting activity has a positive correlation with liver function tests such as serum albumin, choline esterase activity, ICG clearance and inverse correlation with proapo A-I/apo A-I ratio in HDL. These results suggest that the high proapo A-I/apo A-I ratio is due to the decreased proapo A-I-converting activity, and that the liver plays a significant role in the conversion of proapo A-I to apo A-I.

Amino Acid Sequence↗
PubMed1990

Prognostic and therapeutic significance of the flow cytometric nuclear DNA content in non-small cell lung cancer.

To evaluate prognostic and therapeutic significance, tumor DNA content was determined by flow cytometry in 310 paraffin-embedded tissue samples obtained surgically from 130 patients with non-small cell lung cancer. Ninety-six (76.8%) patients had DNA aneuploid patterns that were statistically higher in adenocarcinoma than in squamous cell carcinoma. A better 5-year survival rate was observed in Group A (DNA diploidy, 69.6%) than in Group B (DNA aneuploidy and DNA peridiploidy, 33.2%; P less than 0.001). The survival curves of the patients in Group B continued to decrease during the next 2.5 years. Cox's model analysis showed that both the pathologic stage and the DNA content were the significant prognostic factors for survival. However, the DNA content was an independent prognostic factor in squamous cell carcinoma, but not in adenocarcinoma. These results indicate that DNA content analysis is useful for the evaluation of clinical behavior and prognosis, and that the clinical value of the DNA content must be differentiated between squamous cell carcinoma and adenocarcinoma.

Adenocarcinoma↗
PubMed1990

Flow cytometric DNA content analysis in primary lung cancer: comparison of results from fresh and paraffin-embedded specimens.

Tumor DNA content was determined by flow cytometry in 24 surgically resected specimens from patients with primary lung cancer to compare results from fresh and paraffin-embedded specimens. We found a good correlation in DNA indices between fresh and paraffin-embedded specimens (r = .978), although one tumor with DNA near-diploidy was mistaken as DNA diploid in paraffin-embedded specimens. In the measurements of paraffin-embedded specimens, eight of 24 tumors were DNA multiploid and showed DNA content heterogeneity. These results indicate that DNA content analysis of paraffin-embedded specimens is helpful because it makes it easy to analyze multiple specimens from different parts of the tumor.

Adenocarcinoma↗
PubMed1990

A case of pseudo-Bartter's syndrome associated with hypergastrinemia, thrombocytosis and increased serum thyroxine-binding globulin.

A housewife, 40 years of age, was admitted with dysesthesia of the extremities, muscle weakness, and attacks of adynamia and thirst. She had been taking a laxative for more than 20 years. On physical examination, blood pressure was 94/56 mmHg. Laboratory tests revealed thrombocytosis, low serum K and marked increases in both plasma renin activity and serum aldosterone. Serum TBG was increased. Serum gastrin was also markedly increased and could not be enhanced by exogenous secretin. Both angiotensin 11 loading test and noradrenalin loading test failed to increase blood pressure. Ammonium chloride loading to examine the disturbance of urinary acidification was abnormal in the short term test and borderline in the long term test. Following a diagnosis of pseudo-Bartter's syndrome induced by long term intake of laxative and repeated diarrhea, the administration of laxative was interrupted and potassium, indomethacin and spironolactone were administered. However, serum K remained low. Hypergastrinemia, thrombocytosis and a high serum TBG level also persisted, the causes of which remain unknown. This is the first reported case of pseudo-Bartter's syndrome associated with hypergastrinemia, thrombocytosis and increased serum TBG.

Adult↗
PubMed1990

The effect of OP 2507, a stable analogue of prostacyclin, on Hep G2 exposed to hypoxia.

We developed a model for screening drugs to reduce ischemic liver damage using Hep G2, a hepatoblastoma cell line, and examined the effect of OP 2507, a stable analogue of prostacyclin, on hypoxic cell damage. Hypoxic exposure of the cells was done for 16 hr in an air-tight chamber which was placed inside an incubator and was purged with 5% CO2/95% N2. Adding OP 2507 (0.01-10 ng/ml) to the incubation medium during hypoxic exposure reduced mitochondrial damage estimated by MTT-reducing activity, while it failed to inhibit lactate accumulation in the medium. OP 2507 seems to be a good candidate for improving the preservation of liver allografts.

Animals↗
PubMed1990

[Serum concentration of laminin in transitional cell carcinoma].

The concentration of laminin in the serum was determined for 45 patients with urinary tract transitional cell carcinoma, and the clinical significance of the findings was considered. The difference between the serum laminin concentrations in the control group and the transitional cell carcinoma patient group was not statistically significant, but the serum laminin level was highest in the transitional cell carcinoma patients with metastatic foci. In many of the patients who had metastatic foci and showed clearly progressive disease, the serum laminin concentration was found to increase with the passage of time. When the transitional cell carcinoma tissues were stained by the fluorescent antibody technique, there was little distribution of laminin in the tumor tissues, contrary to our earlier-reported findings regarding the staining of laminin in renal cell carcinoma tissues. In renal cell carcinoma patients, the serum concentration of laminin had been found to be high even when there were no metastatic foci, and consideration of this fact strongly suggests the possibility that the mechanism for laminin synthesis in urinary tract transitional cell carcinoma is different from that in renal cell carcinoma. It was surmised that the serum laminin concentration has potential for use as a diagnostic indicator of metastasis in patients with urinary tract transitional cell carcinoma.

Carcinoma, Transitional Cell↗
PubMed1990

[Clinical and pathological characteristics of lung cancer with chronic obstructive pulmonary disease].

Forty-two lung cancer patients with COPD (7.9% of 534 lung cancers), and 84 age- and sex-ratio-matched controls who were randomly selected from lung cancer patients without COPD were examined. Lung cancers with COPD consisted of 25 cases of squamous call carcinoma (59.5%), 11 of adenocarcinoma (26.2%), 2 of small-cell carcinoma (4.8%), and 4 of large-cell carcinoma (9.5%). Squamous cell carcinoma occurred more in patients with COPD than in controls (35.7%) (p less than 0.01). In squamous cell tumors with COPD, 12 cases (48.0%) were centrally located and 13 cases (52.0%) were peripherally located. Squamous cell carcinoma of peripheral origin occurred more in patients with predominant emphysema (76.9%) than controls (36.7%) (p less than 0.05). Our results suggest that the COPD patients with predominant emphysema may be at greater risk for squamous cell tumors of peripheral origin.

Adenocarcinoma↗
PubMed1990

Liver abscess complicating intratumoral ethanol injection therapy for HCC.

We report a patient who developed multiple liver abscesses and sepsis caused by lactobacilli after the percutaneous intratumoral injection of ethanol for hepatocellular carcinoma. We diagnosed the liver abscess at an early stage because of a the finding of gas on ultrasound and computed tomography. Blood cultures grew Gram-positive rods, which were of the Lactobacillus species. The patient responded to the administration of antibiotics, and his hepatic tumors have not recurred in the 7 months since treatment. This is the first report of liver abscess following percutaneous ethanol injection therapy.

Aged↗
PubMed1990

[Studies on the mechanism of protective effect of selenium on nephrotoxicity of cis-diamminedichloroplatinum (CDDP) in mice].

The mechanism of protective effect of sodium selenite (Se) on the nephrotoxicity of cis-diamminedichloroplatinum (CDDP) was studied with mice. CDDP and Se concentrations in the plasma, blood cell, kidney and liver were measured in mice given CDDP alone and those given both CDDP and Se. The nephrotoxicity of CDDP was observed in mice fed Se deficient diet (SDD). The activities of glutathione peroxidase (G-Px) in the plasma, blood cells, kidney and liver were measured in mice mentioned above. Co-administration of Se did not influence on the concentration of CDDP in the blood, kidney and liver. In mice fed SDD, the nephrotoxicity of CDDP increased and G-Px activities of the blood and kidney decreased. In mice given Se, G-Px activities was not increased. These results suggest that interaction between CDDP and Se differs from that between mercury and Se, or between cadmium and Se (formation of compound). Intake of Se is related to the appearance of the nephrotoxicity of CDDP. G-Px may be related partially to the protective effect of Se on the nephrotoxicity of CDDP.

Animals↗
PubMed1990

[Hepatic functional reserve and tumor size as prognostic factors in patients with primary liver cancer undergoing non-surgical therapy].

A prognostic study on 119 patients with primary liver cancer undergoing nonsurgical therapy was carried out to evaluate the relevance of hepatic functional reserve and tumor size to their cumulative survival rates. All patients were classified into the three groups of Child's classification (A, B and C) according to their hepatic functional reserve and were also divided into the five groups according to their tumor size. The cumulative survival rates of all patients at 1, 2, 3, 4 and 5 years after the diagnosis were 50.9, 28.3, 18.8, 13.5 and 6.7%, respectively. The cumulative survival rates of group V whose tumor occupied more than 40% of the liver area were significantly lower than those of the other tumor-size-groups. The survival rates of Child's group A were significantly higher than those of group B and C. But in those patients who were classified into group V according to their tumor size, there was no significant difference in their survival rates among the three groups of Child's classification. These results suggest that hepatic functional reserve as well as tumor size is an important prognostic factor in patients with primary liver cancer. But if the cancer once develops greater than 40% of the liver area, hepatic functional reserve diminishes in value as a prognostic factor.

Antineoplastic Agents↗
PubMed1989

[Serum concentration of laminin in renal cell carcinoma].

Serum concentration of laminin was measured radioimmunologically in 19 patients with renal cell carcinoma and 71 normal controls. The serum laminin levels of renal cell carcinoma patients were significantly higher than those of normal controls. After nephrectomy the elevated serum levels of laminin showed marked decreases in most of the patients without metastasis. By the immunofluorescent technique with LAM-1, a monoclonal antibody which is specific to laminin A and B chains , strong fluorescence was found in the extracellular matrix in renal cancer tissue. Taken all these facts together, renal cell carcinoma may be a laminin synthetic tumor. The average serum laminin level of the patients with a disseminated disease were significantly higher than that of the patients with a localized disease. The elevated serum level of laminin may play an important role in the process of tumor metastasis. Furthermore, our data suggest that elevated laminin levels may predict the subsequent course of a tumor condition. The monitoring of serum laminin level may be valuable for following-up of the course of renal cell carcinoma.

Adult↗
PubMed1989

[Clinical study of multiple primary cancers including lung cancer].

Out of a total of 506 lung cancers treated between 1977 to 1988, a total of 27 (5.3%) multiple primary cancers were uncovered. The patients consisted of 20 males and 7 females and their average age was 67 (48-81) years. The frequency seen in the histological type of patient with multiple primary cancers was the same as that seen in their background lung cancers. Twenty-one (78%) patients were smokers. Thirteen patients (45%) had a family history of cancer. Two cases had 3 family members who had a cancer history. The tumor DNA contents of 2 cases with multiple primary cancers were analyzed. In both cases, the DNA indices were found to differ between the first and the second cancer. Thus, it may be possible to identify multiple primary cancers by determining the tumoral DNA content.

Aged↗
PubMed1989

[Megakaryocyte proportion versus nucleated cells in the peripheral blood showing leukoerythroblastosis].

Megakaryocytes in the peripheral blood in which leukoerythroblastosis was recognized were studied by electron microscopy on the vertically cut section of the buffy coat of the blood, and percentages of them in 10,000 nucleated cells distributed from the top of the bottom of the buffy coat were counted. In 15 of 31 patients, percentages of peripheral blood megakaryocytes ranging from 0.01% to 0.64% were seen. There was difference of the result among diseases shown peripheral blood megakaryocytes. Namely, in patients with myelofibrosis and CML, in whom extramedullary hematopoiesis was predominant, many cases ascertained peripheral blood megakaryocytes were demonstrated. Because of this result, the extramedullary hematopoiesis appears to play an important role to the presentation of megakaryocytes in the peripheral blood. On the other hand, patients indicating both megakaryocytes and abnormal sideroblasts in the peripheral blood had sideroblastic anemia marrow. This result seems to show that a part of megakaryocytes are directly flowed out from the marrow into the blood simultaneously accompanied with abnormal sideroblasts.

Adolescent↗
PubMed1989

[Spontaneous remission in a case of non-Hodgkin's lymphoma].

A 59-year-old-male was admitted in September 1984 with fever and right hypochondrial pain. On computed tomography, a bulky retroperitoneal tumor involving the intestine was detected. Exploratory laparatomy yielded a diagnosis of non-Hodgkin's lymphoma. Although intensive and aggressive treatment combined chemotherapy and radiotherapy was administered, no conclusion could be drawn about its efficiency, and no remission was indicated by followup studies. He refused further treatment because of bone marrow depression. However, 9 months after the last treatment disappearance of the tumor was recognized on computed tomography examination. This phenomenon was confirmed by the second laparatomy performed in order to treat skin-colon fistula caused from diverticulitis of the colon. It was recognized no evidence of malignant lymphoma in the resected colon specimen. He remains in excellent health 26 months after this events. The clinical course of this case was probably compatible with the concept of spontaneous remission of malignant lymphoma.

Humans↗
PubMed1988

Simultaneous flow cytometric detection of nuclear DNA and tumor-associated antigens in lung cancers.

Flow cytometric (FCM) determinations of DNA index were found to be insufficient to distinguish the presence of tumor cells from normal ones in neoplastic tissues obtained from 29 patients with lung cancer. Therefore, the DNA and tumor-associated antigen (TAA) contents of cultured human lung cancer cells were simultaneously analyzed using FCM to assess whether this dual technique would help in distinguishing tumor cells from normal ones. For the study, cells from PC-10 (a squamous cell carcinoma line), PC-3 (an adenocarcinoma line) and PC-6 (a small cell carcinoma line) were mixed with normal peripheral lymphocytes. The TAAs studied were carcinoembryonic antigen (CEA), squamous cell carcinoma antigen (SCCA) and neuron-specific enolase (NSE). The alcohol-fixed cells were treated with the respective primary TAA, followed by fluorescein-isothiocyanate-conjugated secondary antibody; the cellular DNA was then stained using propidium iodide. Red and green fluorescences were measured simultaneously by FCM. The results showed CEA mainly in PC-3 cells, SCC in PC-10 cells and NSE in PC-6 cells; thus, each cell type had a relatively specific TAA. DNA content and cell size analyses differentiated neoplastic cells from normal lymphocytes for PC-3 and PC-10 cells, but not for PC-6 cells. Simultaneous FCM analyses of DNA and the TAA specific for the individual cell type made it possible to distinguish all tumor cell types from normal lymphocytes.

Adenocarcinoma↗
PubMed1988

[Cell cycle analysis using the monoclonal antibody Ki-67].

We determined by flow cytometry the proportion of cells in cycle with the monoclonal antibody Ki-67 and also in S-phase after incorporation of bromodeoxyuridine (BrdUrd) with monoclonal antibody to BrdUrd. The monoclonal antibody Ki-67 was useful to detect a nuclear antigen present only in proliferating cells but not expressed in resting (Go) cells. Cell preparation to measure BrdUrd amount incorporated into cellular DNA was difficult but this anti-BrdUrd antibody was useful for measuring the rate of DNA synthesis and for the analysis of precious cell kinetics. These antibodies may provide useful information of cell kinetics.

Antibodies, Monoclonal↗
PubMed1988

[Prognostic significance of the nuclear DNA content of a small adenocarcinoma of the lung].

DNA ploidy has been determined by flow cytometry in 28 surgical specimens from patients with adenocarcinoma of the lung (tumor diameter, 3.0 cm or less), and the relationship between DNA ploidy and the clinical stage and survival also has been investigated. The cases were classified according to the DNA index (DI) into group A (DI 1.00 to 1.50), group B (DI 1.51 to 2.00) and group C (DI greater than 2.01). A close relationship was observed between the DI and the survival rates but not between the DI and the clinical stage. Tumor ploidy is considered to be one of the prognostic factors and may be useful in selecting adjuvant therapy.

Adenocarcinoma↗