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Biomedical subjects

K Takatsuki

Publications and source records attributed to K Takatsuki.

At least 451 records · Page 25Linked to original sources
PubMed1985

[A case of primary adenocarcinoma of the urinary bladder occurring in a patient with type 1 multiple endocrine adenomatosis (MEA)].

A case of primary adenocarcinoma of the urinary bladder occurring in a patient with type 1 multiple endocrine adenomatosis (MEA) is presented. The patient was a 36-year-old female who had a past history of type 1 multiple endocrine adenomatosis, namely, adenomatosis of the parathyroid gland, insulin and gastrin-producing adenomatosis of the pancreas, and prolactin-producing pituitary adenoma. She was admitted in January 1981 with the complaints of gross hematuria, pollakisuria and micturition pain lasting for about one year and a half. Cystoscopic examination revealed four solid tumors in the posterior and left lateral walls of the bladder with diffuse mucosal hyperemia. Biopsy of the tumors disclosed that they were adenocarcinoma. Clinical examinations revealed that there was no extravesical primary malignant neoplasm in this case. Radical cystectomy with urinary diversion by ileal conduit was performed on January 22, 1981. Histological examination revealed that the tumor was adenocarcinoma originating from the vesical mucosa. Follow-up for over three years since the time of surgery has not shown any sign of tumor recurrence or occurrence of extravesical malignant neoplasm. In addition, 28 cases of primary adenocarcinoma of urinary bladder in Japan reported during the last 25 years are reviewed and analyzed.

Adenocarcinoma↗
PubMed1985

Natural antibodies in sera from Japanese individuals infected with HTLV-I do not recognize HTLV-III.

Seventy-one sera from Japanese individuals infected with human T cell leukemia virus type I (HTLV-I) were examined for the presence of antibodies to HTLV-III by an enzyme-linked immunosorbent assay (ELISA) and by a strip radioimmunoassay based on the Western blot technique. The sera were from 23 healthy carriers and from 48 patients, including 18 with smoldering adult T cell leukemia (ATL), 13 with chronic ATL, and 17 with acute ATL. All people tested lived in the southwestern part of Japan, a known endemic area for HTLV-I infection. Antibodies against HTLV-I were detected in all sera both by indirect immunofluorescent methods and strip radioimmunoassay using cell lysates. Six sera were reactive in the ELISA assay for HTLV-III. But these sera did not react specifically to HTLV-III-related proteins (p15, p24, gp41) when analyzed by strip radioimmunoassay. Our data suggest that coincidental infection of HTLV-I and HTLV-III is quite rare in Japan.

Antibodies, Viral↗
PubMed1985

Isozymes of human erythrocyte pyrimidine 5'-nucleotidase.

A scheme for the partial purification of human erythrocyte pyrimidine nucleotidase isozymes is presented. The characteristics of three of these were distinctively established. One isozyme, designated pyrimidine nucleotidase (PyrNase), is active for uridine monophosphate (UMP) and cytidine monophosphate (CMP), but not for thymidine monophosphate (dTMP). Two other isozymes, designated thymidine nucleotidase I (ThyNase I) and thymidine nucleotidase II (ThyNase II), were active for dTMP, but less so for UMP and CMP. Molecular weights of PyrNase, ThyNase I, and ThyNase II were estimated as 52,000, 52,000, and 48,000, respectively. Isoelectric points of these isozymes were 5.22, 4.90, and 4.68, respectively. Kinetic study revealed that the Km value for dTMP of ThyNase I was 3.83 mmol/L and of ThyNase II was 6.26 mmol/L.

5'-Nucleotidase↗
PubMed1985

Chromosomal aberrations in adult T cell leukemia: relationship to the clinical severity.

A chromosome study was performed in 18 patients with adult T cell leukemia (ATL), who were divided into three groups according to their clinical manifestations: nine had acute ATL, six had chronic ATL, and three had smoldering ATL. Mitotic cells were obtained from peripheral blood, lymph node, or bone marrow and were analyzed by the G-banding technique. In acute ATL, the chromosome number ranged from diploid or pseudodiploid to hyperdiploid; in the chronic type, from hypodiploid to hyperdiploid; but in the smoldering type, it was diploid. Eight of nine patients with acute ATL had trisomy 3 and/or trisomy 7, whereas none of those with chronic ATL exhibited these aberrations. Patients with smoldering ATL had a normal karyotype. The present findings indicate that the more aggressive the clinical course of ATL, the more complex the numerical and structural chromosome abnormality.

Adult↗
PubMed1985

Nonsecretory myeloma: analysis of two patients by immunoperoxidase studies and plaque-forming cell assay.

We studied the production and secretion of immunoglobulin by tumor cells in two patients with nonsecretory myeloma, by means of an immunoperoxidase technique and plaque-forming cell assay. Immunoperoxidase staining of bone marrow cells revealed monoclonal proliferation of immunoglobulin-containing cells, and the plaque-forming cell assay of peripheral mononuclear cells and bone marrow cells showed secretion of monoclonal immunoglobulin from the myeloma cells. These observations suggest that the secreted protein disappears as a result of enhanced catabolism or rapid deposition. There has been speculation as to the existence of this type of nonsecretory myeloma, but there had been no evidence. We were able to demonstrate it with the plaque-forming cell assay.

Aged↗
PubMed1985

Natural killer activity and antibody-dependent cell-mediated cytotoxicity in multiple myeloma.

Natural killer (NK) activity and antibody-dependent cell-mediated cytotoxicity (ADCC) were studied by routine methods in 11 patients with untreated malignant monoclonal gammopathy. NK and/or ADCC activity was clearly reduced in three patients with advanced disease. Moreover, sera from some myeloma patients impaired the ADCC and NK activity. A large quantity of purified monoclonal IgG from one patient appeared to inhibit NK and ADCC activity as did high concentrations of pooled polyclonal immunoglobulin from healthy persons. In two of these 11 patients, other malignancies were diagnosed prior to chemotherapy. One of these patients, who had nonsecretory myeloma, had marked impairment of NK and ADCC activity; the other, with IgG myeloma, had normal NK and ADCC activity.

Aged↗
PubMed1984

Unusual clinical courses of adult T-cell leukemia in siblings.

Two siblings who developed adult T-cell leukemia (ATL) with unusual clinical courses are presented. The brother showed spontaneous remissions at the beginning stage of the disease of 6 years' duration, and the sister remains free of complaints for 6 years without chemotherapy. The patients and 2 of 12 healthy members of their family examined had serum antibodies against ATL-associated antigens (ATLA). The expression of ATLA was observed in the cultured lymphocytes from the patients and one of the family members.

Antibodies, Monoclonal↗