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Biomedical subjects

M Takeya

Publications and source records attributed to M Takeya.

At least 127 records · Page 7Linked to original sources
PubMed1989

An immunohistochemical and immunoelectron microscopic study of the ontogeny of rat Langerhans cell lineage with anti-macrophage and anti-Ia monoclonal antibodies.

An immunohistochemical study with anti-macrophage and anti-Ia monoclonal antibodies was performed to clarify the relationship between Langerhans cells (LC) and indeterminate cells (IC) in rat epidermis both in adulthood and in the fetal stage. On immunoelectron microscopy, a mouse anti-rat macrophage monoclonal antibody, TRPM-1, recently produced by us, reacted with IC and some LC in adult rat skin. Ontogenic study revealed that TRPM-1-positive cells first appeared in the epidermis of fetal rat heads on Day 17 of gestation and then spread caudally along the anterior-posterior axis. On Day 20 of gestation, when the distribution of the TRPM-1-positive cells over body surface became even, Ia-positive cells appeared in the epidermis and began to increase in number. Ia-positive cells with Birbeck granules were found on Day 21 of gestation. These results indicate that. TRPM-1-positive IC matured into Ia-expressing LC after being exposed to microenvironmental change during the perinatal period. The number of Ia-positive cells exceeded that of TRPM-1-positive cells at around 5 d after birth. Afterwards, there were more dendritic Ia-positive cells found in the interfollicular areas than TRPM-1-positive ones. However, local concentrations of the TRPM-1-positive IC in the follicular infundibula were frequently found in the fetal stage and occasionally in adulthood. These TRPM-1-positive cells in the follicular infundibula were thought to be a precursor pool in the epidermis for LC.

Aging↗
PubMed1989

Phagocytic multiple myeloma with disseminated intravascular coagulation.

We describe an atypical case of IgG lambda multiple myeloma in a 28-year-old patient. He developed multiple cutaneous plasmacytomas, and the terminal event, leukemic conversion by phagocytic plasma cells and disseminated intravascular coagulation. Secretion of monoclonal immunoglobulin (IgG lambda) from myeloma cells was demonstrated by plaque-forming cell assay. Electron microscopy showed myeloma cells with well-developed rough endoplasmic reticulum and erythroid cells or platelets in intracytoplasmic vacuoles.

Adult↗
PubMed1989

Heterogeneity of rat macrophages recognized by monoclonal antibodies: an immunohistochemical and immunoelectron microscopic study.

Three monoclonal antibodies, designated RM-1, TRPM-1, and TRPM-2, were raised against rat peritoneal macrophages. By the immunoperoxidase method, antigens recognized by these antibodies were distributed throughout most tissue and free macrophages examined, including those of splenic red pulp, lymphatic sinus, connective tissue, and peritoneal cavity, as well as Kupffer cells of liver and alveolar macrophages. The numbers of positive cells were different for each antibody. RM-1 and TRPM-1 were also reactive with interdigitating cells (IDCs) in the thymus-dependent area and with Langerhans cells in the skin, whereas TRPM-2 failed to demonstrate IDCs in thymic medulla and Langerhans cells. The reactions of each antibody were observed by immunoelectron microscopy in the different ultrastructural compartments of the cells. RM-1 recognized a cell surface antigen; reaction products for TRPM-1 were found on a part of the cell membrane and in the cytoplasmic vacuoles; and those of TRPM-2 were present along the nuclear envelope and intracytoplasmic vacuoles. These antibodies seem to be useful not only for the detection of macrophages in tissue sections but also for investigation of macrophage heterogeneity in different tissues.

Animals↗
PubMed1988

Ectopic production of salivary-type amylase by a IgA-lambda-type multiple myeloma.

A patient with IgA-lambda-type multiple myeloma who appeared to be secreting salivary-type amylase ectopically is reported. Both the patient's serum and urine contained high levels of amylase. Amylase activity in the supernatant of cultured myeloma cells, obtained from the patient's pleural effusion while he had malignant pleuritis, increased almost linearly from the time of cell seeding. The presence of IgA and S-type amylase in the myeloma cells was demonstrated cytochemically and by immunoelectron microscopy. These observations showed that amylase was produced by these human myeloma cells.

Amylases↗
PubMed1988

Histo- and immunopathological features of terminal AIDS. An autopsy case of a Japanese man with neurological signs as initial symptoms.

An autopsy case of a 37-year-old Japanese man, confirmed as an AIDS patient infected by an undetermined route of transmission, is presented. The initial symptoms of full-blown AIDS in this case were neurological, and the patient died of severe pneumonia 9 months after onset. The main histo- and immunopathological features were a marked depletion of helper-inducer T cells and dendritic reticulum cells in the lymphoid tissues, opportunistic infections, and some neuropathologic changes. Very few cells, possibly macrophages, immunoreactive with a monoclonal antibody (VAK-5) against HIV-gag protein P24 were found in the mediastinal lymph nodes. Numerous pathogens had induced opportunistic infections in many organs: severe and generalized cytomegalovirus infection, Pneumocystis carinii pneumonia, bronchopneumonia (possibly due to Pseudomonas aeruginosa), candidiasis in the tongue and oral cavity, and atypical mycobacteriosis in the pulmonic hilar lymph nodes. Vascular proliferation was found in the perinodal regions of some lymph nodes, but this was not neoplastic vascular proliferation compatible with that of localized Kaposi's sarcoma.

Acquired Immunodeficiency Syndrome↗
PubMed1988

Ultrastructural changes in peripheral nerves of the fingers of three vibration-exposed persons with Raynaud's phenomenon.

A finger biopsy was performed on three patients with vibration-induced white finger (VWF), and the specimens were examined by electron microscopy for peripheral nerve changes. A characteristic neuropathy with perineurial fibrosis was revealed which was often accompanied by a thickened perineurium with a lamellar structure resembling onion skin. This peculiar fibrosis consisted of elongated cytoplasmic projections of perineurial cells or fibroblasts and a greatly increased amount of collagen which occasionally contained fibrous long-spacing collagen. In the endoneurium, a decrease in the number of nerve fibers and a marked increase in collagen with fibroblasts were noted. Myelinated axons became smaller, and this occurrence suggested incomplete regeneration. The pathological changes were presumably the result of the long-term clinical course of VWF.

Aged↗
PubMed1988

Establishment and characterization of an amylase-producing human myeloma cell line.

Two stable lines of IgA lambda-producing plasma cells (KHM-1A and KHM-1B) that were free of the Epstein-Barr virus were established from a patient with multiple myeloma complicated by hyperamylasemia. Surface marker studies of the two cell lines showed that the cells had no surface immunoglobulins but were positive for cytoplasmic immunoglobulins (IgA lambda) and for HLA-DR and PCA-1. Secretion of IgA monoclonal immunoglobulin by the two lines was detected by a plaque-forming cell assay and by an enzyme-linked immunosorbent assay of culture media. KHM-1B cells also secreted alpha-amylase, but no such activity was detected in the culture-conditioned supernatant fluid of KHM-1A.

Amylases↗
PubMed1987

Hypercalcemia and osteoclast proliferation in adult T-cell leukemia.

Eighteen autopsy cases of adult T-cell leukemia (ATL) were investigated clinicopathologically. Thirteen of the patients had hypercalcemia during their clinical course. Nine of the thirteen had a high level of serum calcium at the terminal stage, even after extensive chemotherapy. Microscopic examination of the bone revealed proliferation of osteoclasts and bone resorption in eight patients. No osteoclast proliferation or bone resorption was found in the other nine normocalcemic patients. The infiltration of ATL cells was observed in only two patients--one was hypercalcemic and the other, normocalcemic. The factors affecting the serum calcium level were examined in two hypercalcemic patients. Hypercalcemia could not be accounted for by parathyroid hormone or prostaglandins E levels, which were in the normal range, or by 25-hydroxyvitamin D and 1,25-dihydroxyvitamin D, which were low. Our findings are consistent with the mechanism proposed by several investigators, that the malignant T-lymphocytes produced an osteoclast-activating-factor-like substance that caused osteoclast proliferation and hypercalcemia.

Adult↗
PubMed1987

A new monoclonal antibody, TRPM-3, binds specifically to certain rat macrophage populations: immunohistochemical and immunoelectron microscopic analysis.

An anti-macrophage monoclonal antibody designated TRPM-3 was produced using thioglycollate-elicited rat peritoneal macrophages as immunogen. By the immunoperoxidase method, TRPM-3 was found to be specific for certain macrophage populations, such as marginal zone macrophages and marginal metallophils of the spleen, sinus macrophages of the lymph nodes, and omentum macrophages. No epithelial cells, peripheral blood monocytes, granulocytes, or lymphocytes had reacted with TRPM-3. Immunoelectron microscopically, reaction to TRPM-3 was clearly demonstrated on the plasma membrane of splenic marginal zone macrophages, lymphatic sinus macrophages, omentum macrophages, and peritoneal macrophages. Accordingly, TRPM-3 was considered to have recognized the particular membrane antigen expressed by restricted macrophage populations.

Animals↗
PubMed1987

Pathobiochemical alterations in experimental chronic and acute trypanosomal infection in mice.

During an experimental chronic infection of inbred mice with Trypanosoma congolense several physiological parameters become altered. Splenomegaly followed later by hepatomegaly are predominant. Lactate dehydrogenase and aminotransferase activities of the plasma are elevated, the number of erythrocytes and thrombocytes decreases, whereas monocytic cells are detected in higher concentrations. Gamma-Globulins and transferrin become elevated. Some of the pathobiochemical alterations depend directly on the parasitaemia and are reversed to normal values after chemotherapy with diminazene aceturate (Berenil). The curative effect of this drug depends largely on when it is administered. In acute T. congolense infections, leading to the death of the animals in 3-4 days, pathobiochemical alterations are found only shortly before the exitus.

Alkaline Phosphatase↗
PubMed1986

Immunoelectron microscopic analysis of the binding of monoclonal antibodies to molecular variants of human placental alkaline phosphatase.

Three monoclonal antibodies with distinct antigenic specificities were examined by electron microscopy for their binding to three common genetic variants (SS, FS, and FF) of human placental alkaline phosphatase. In the reaction with the monoclonal antibody H5, all three variants of human placental alkaline phosphatase preferentially formed circular immune complexes composed of two antibodies and two enzyme molecules. In separate reactions with the F11 and B2 monoclonal antibodies, the SS variant formed circular complexes and the FS variant formed Y-shaped complexes composed of one antibody and two enzyme molecules, whereas the FF variant scarcely reacted. These results confirm immunochemical data showing that H5 binds to both S and F subunits with similar affinities, whereas F11 and B2 bind the S subunit with markedly higher affinity than they do the F subunit. Furthermore, the formation of circular complexes in the reaction of the mixture of the two antibodies, F11 and B2, with FS molecules suggests that these two antibodies bind to different sites on the S subunit. Therefore, the F and S subunits differ from one another at more than one site. This is the first indication that alleles of human placental alkaline phosphatase may result from more than just single point mutations in the gene encoding them.

Alkaline Phosphatase↗
PubMed1985

Concurrence of lymphoma type adult T-cell leukemia in three sisters.

Three sisters, ranging in age from 56 to 59 years, who developed lymphoma type adult T-cell leukemia (ATL) during a 19-month period are described. The patients were born in the Amakusa area of Kumamoto Prefecture, an area where the incidence of malignant lymphoma is high. The histologic diagnosis, made on the basis of the Lymphoma Study Group in Japan (LSG) classification of lymph nodes, was diffuse, medium-sized cell type in the elder sister, and mixed cell type in the middle and younger sisters. The patients and their elder brother had serum antibodies against ATL-associated antigens (ATLA).

Antigens, Viral↗
PubMed1985

Rat liver alkaline phosphatases. Evidence hepatocyte and portal triad enzymes differ.

Using biochemical and electron microscopic histochemical techniques, we studied membrane-bound alkaline phosphatase activities of rat hepatocytes and portal triads. Activity in portal triads was localized to capillaries surrounding bile ducts (peribiliary plexus) and arterioles. Despite the reputation of alkaline phosphatase as a "biliary enzyme," activity was not observed in bile ducts. Livers were separated into hepatocyte and portal triad fractions with collagenase. Enzyme from hepatocytes migrated faster during electrophoresis and eluted later during anion-exchange chromatography than that from portal triads. Thus, hepatocyte enzyme is more negatively charged (and also possibly smaller) than portal triad enzyme. Twelve hours after bile duct obstruction, new activity appeared on lateral and sinusoidal membranes of hepatocytes; appearance of portal triads did not change with obstruction. Electrophoretic mobilities of the two forms were not altered by obstruction. We conclude that two distinct liver alkaline phosphatases exist, one in hepatocytes, the other in portal triad blood vessels.

Alkaline Phosphatase↗
PubMed1985

Characterization of the placental alkaline phosphatase-like (Nagao) isozyme on the surface of A431 human epidermoid carcinoma cells.

A431 human epidermoid carcinoma cells monophenotypically express the placental alkaline phosphatase (PLAP)-like enzyme shown by its catalytic and antigenic characteristics, properties which are shared by the Nagao isozyme. More specifically, it is L-leucine sensitive just as is the rare placental D-variant of PLAP and the testicular heat-stable enzyme. Collectively, these are all referred to as PLAP-like enzymes. The enzyme was localized to the surface of the plasma membrane since it was released in an active form by bromelain treatment of cells. The number of molecules per A431 cell was estimated by radioimmunoassay at 7.5 X 10(5), a value significantly higher than that observed for HeLa TCRC-1 cells (5 X 10(4) which express the S-variant of PLAP, also referred to as the Regan isozyme. The quantity of the enzyme was increased significantly (10-fold) by treating the cells with modulating agents including sodium butyrate, prednisolone, and hyperosmolar sodium chloride. The identification of a cell line such as A431 with enhanced expression in the amount of the PLAP-like enzyme and which can be further enhanced by modulating agents will facilitate studies of the differences and the similarities between this protein and other variants of PLAP. The A431 cell line now takes its place with other cell lines which are phenotypically restricted in their expression of alkaline phosphatase. Finally, the A431 cell line is also shown here to be a suitable model system for in vivo tumor studies such as immunolocalization.

Alkaline Phosphatase↗
PubMed1984

Molecular dimensions of the SS and FF phenotypes of human placental alkaline phosphatase. Rotary shadowing and negative staining electron microscope measurements.

The two most common homologous phenotypes (SS and FF) of human placental alkaline phosphatase were purified and observed in the electron microscope by rotary shadowing and negative staining techniques. In the rotary shadowing technique, the molecules of the two phenotypes appeared to be approximately elliptical with slit-like structures in the center of the molecules, suggestive of the groove between two subunits. The dimensions of the rotary-shadowed molecules were calculated as 10.1 nm X 5.7 nm for SS and 10.1 nm X 5.6 nm for FF phenotypes. The negative staining technique delivered more fine detail of the molecules than rotary shadowing. The predominant shape of the molecules in this method appeared to be rectangular, with a longitudinal stain-filled groove and with each of the half molecules (presumably 65,000 Mr subunit) very often appearing bi-lobed. This accounts for the molecules which appear to have four pronounced electron-transparent regions. The dimensions of the negatively stained rectangular-shaped molecules were measured as 7.5 nm X 5.5 nm for SS and 7.6 nm X 5.4 nm for FF phenotypes. No significant difference in electron microscopic appearance between the SS and FF phenotypes were observed.

Alkaline Phosphatase↗