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Biomedical subjects

K Kitamura

Publications and source records attributed to K Kitamura.

At least 973 records · Page 54Linked to original sources
PubMed1988

Effect of captopril treatment on proteinuria in NZB/NZW F1 hybrid mice.

Oral treatment of female NZB/NZW F1 hybrid mice with captopril prevented the development of proteinuria and prolonged survival in mice demonstrating slight (trace to 1+) proteinuria. Captopril treatment also markedly reduced the incidence and magnitude of proteinuria and prevented death in mice showing significant (3+ or greater) proteinuria. Histopathological studies of the kidneys of treated mice further demonstrated improvements in the renal lesions of autoimmune mice. The mechanisms whereby captopril treatment influences the course of disease in NZB/NZW mice are not known.

Animals↗
PubMed1988

Pulmonary hypertension in a patient with rheumatoid arthritis.

A 53-year-old woman who had suffered from severe rheumatoid arthritis developed pulmonary hypertension. Her small arteries in the lung showed plexogenic arteriopathy with fibrous intimal hyperplasia. There was also vasculitis of the small arteries in other organs and mural thrombosis in the pulmonary stem and abdominal aorta. The plexogenic arteriopathy which was responsible for pulmonary hypertension appears to be the result of vasculitis in association with rheumatoid arthritis.

Arthritis, Rheumatoid↗
PubMed1988

[Clinicopathological study of oligodendroglioma with special reference to immunohistochemical investigation].

The present study was undertaken to evaluate the utility of pathologic features and specific immunohistochemical studies in estimating the prognosis of oligodendroglioma. The pathological diagnosis of an oligodendroglioma was made on HE stained-sections according to WHO classification. Sixteen oligodendrogliomas, twelve mixed oligoastrocytomas and ten anaplastic oligodendrogliomas were immunotested by the peroxidase-antiperoxidase (PAP) method with anti-GFAP serum, anti-S-100 serum and anti-MBP (Myelin basic protein) serum and by the avidin biotin peroxidase-complex (ABC) method with anti-vimentin serum and ant-Leu 7 monoclonal antibody. GFAP positive cells were interpreted as reactive astrocytes, neoplastic astrocytes and neoplastic oligodendrocytes, S-100 positive cells were interpreted as reactive astrocytes and neoplastic astrocytes. Leu 7 positive cells were found in only one case of anaplastic oligodendroglioma. Anti-Leu 7 could not be considered as a specific marker for oligodendroglioma. Of the anaplastic oligodendroglioma 60% displayed MBP positively and 70% displayed vimentin positively. NSE positive cells were found in a few anaplastic oligodendrogliomas. The present study has not so far uncovered any marker that is restricted to oligodendrogliomas. However GFAP may be useful to assess the extent of reactive astrocytes and neoplastic astrocytes in the oligodendroglioma or mixed oligoastrocytoma. MBP and vimentin will help to determine the malignancy of oligodendroglioma.

Adult↗
PubMed1988

[Clinical application of monoclonal antibody-drug conjugates in colorectal carcinoma].

Monoclonal antibody, A7, produced from a mouse splenocyte immunized against human colon cancer was used as drug carrier for colon cancer. A7 had not ADCC and ADMC activity but had ACD activity. Anticancer drug, mitomycin C (MMC), and neocarzinostatin (NCS), were covalently bound to A7 to form the conjugates, A7-MMC, and, A7-NCS. In vitro cytotoxic effect of the conjugates on SW1116 was much stronger than that of free MMC or free NCS. The conjugates, A7-NCS, administered in nude mice brought about the highest NCS concentration in tumor, while normal IgG-NCS distributed evenly in all the tissues. The conjugates showed strong antitumor effect on colon cancer transplanted in nude mice. Forty one patients with colorectal cancer including 10 patients with postoperative metastasis were given A7-NCS. The immunoperoxidase and drug concentration studies of the resected specimens revealed that NCS was found to be localized specifically in cancer. There was no serious adverse effect in the patients receiving the conjugate. Of eight patients with postoperative liver metastasis, three showed evidence of tumor reduction on CT scan and three claimed pain relief. The conjugate was of no benefit to the patients with multiple lung metastasis and peritoneal metastasis.

Adult↗
PubMed1988

[Ossified choroid plexus papilloma--case report].

While the calcification has been documented radiologically in 4 - 25 percent of the cases with choroid plexus papilloma, the ossification of choroid plexus papilloma has been reported only in 3 cases on literature. In this paper, we present a case of large ossified choroid plexus papilloma in the right lateral ventricle. A 35-year-old man was admitted with left hemiparesis and headache. Skull X-rays showed an abnormal calcified mass (25 mm x 23 mm x 14 mm) in the right temporal region. CT scan revealed an abnormal high density area protruding into the right lateral ventricle, and a low density area at the right corona radiata. Operation was carried out with a right temporal craniotomy. The mass was yellowish-elastic hard and protruded into the right inferior horn of the lateral ventricle. The histological examination of surgical specimen showed an ossified choroid plexus papilloma with some bone marrow formation and numerous calcification. Calcification of choroid plexus papilloma is found frequently, but ossification is a very rare neuropathological abnormality. Bone and/or cartilage formation in neuroepithelial neoplasms is an unusual event histopathologically. Several mechanisms have been proposed, such as (1) metaplasia of connective tissue, (2) transformation of neuroepithelial cells to mesenchymal tissue, (3) teratomatous nature, (4) heteroplasia, (5) mixed mesenchymal-neuroepithelial nature, and (6) ossification as an end stage of mucoid degeneration. In our case, it was considered that the bone formation resulted from metaplasia of connective tissue of choroid plexus papilloma.

Adult↗
PubMed1988

[Glial fibrillary acidic protein and neurofilament protein in medulloblastoma].

Medulloblastoma is the most common primitive neuroectodermal tumor (PNET) with the potential to differentiate along glial or neuronal lines. Thirty cases of medulloblastoma were tested by the peroxidase-antiperoxidase (PAP) method with anti-GFAP serum (DAKO) and by the avidin-biotin peroxidase complex (ABC) method with 68kd subunit of anti-NF antibody. All the cases were classified into three subtypes based on these immunohistochemical findings and were analyzed in relation to clinico-pathological features. Fifteen of thirty medulloblastomas contained GFAP positive cells, seventeen showed cells reacting to NF. The reactions for both proteins were present in eight medulloblastomas (PNET-BD, bipotential differentiation). Seventeen medulloblastomas reacted to only one protein (PNET-MD, monopotential differentiation). No reaction for either was found in five cases (PNET-NOS, not otherwise specified). The two year survival rate was 12.5% for PNET-BD compared to 49.2% for PNET-MD and 53.3% for PNET-NOS. Nine variables, i.e. age, tumor stage, metastatic stage, operation, radiotherapy, chemotherapy, histology, GFAP and NF, were analyzed using Cox's proportional hazard model. This revealed that the significant factors were tumor stage (p = 0.0002), GFAP (p = 0.0008) and operation (p less than 0.05). In conclusion, GFAP is the most important histological factor for prognosis and medulloblastoma without glial differentiation has a much better prognosis than one with glial differentiation.

Adolescent↗
PubMed1988

[Clinical application of microfibrillar collagen hemostat (Avitene) in neurosurgical field].

Microfibrillar collagen hemostat (Avitene) is a new absorbable hemostatic agent, of which mechanisms are adhesion to the bleeding site and platelet aggregation. Histopathological examinations revealed that Avitene was biocompatible with cerebral cortex in an animal experiments. Our previous studies indicated that Avitene is very effective and safe to use as a topical hemostatic agent during craniotomy in an experimental animal. Avitene was used as a topical hemostatic agent during craniotomy in 36 patients with intracranial organic lesions. Its effectiveness of hemostasis was revealed in 95%. This agent was especially useful to prevent oozing during craniotomy. Side effect of this agent was not reported in this study. Therefore, Avitene is very effective and safe to use as a topical hemostatic agent in the neurosurgical field.

Brain↗