摘要:
A method for discriminating and counting erythroblasts comprises the steps of: (i) staining leukocytes in a hematologic sample by adding a fluorescent labeled antibody capable of binding specifically with leukocytes to the hematologic sample; (ii) raising the permeability only of cell membranes of erythroblasts in the hematologic sample to a nucleotide fluorescent dye which does not permeate a cell membrane usually, the nucleotide fluorescent dye having a fluorescent spectrum capable of being distinguished from that of a fluorescent labeling compound of the fluorescent labeled antibody in step (i); (iii) staining nuclei of the erythroblasts in the hematologic sample with the nucleotide fluorescent dye; (iv) subjecting the hematologic sample to flowcytometry to detect at least two fluorescent signals from each cell; and (v) discriminating and counting the erythroblasts from difference in intensity between the at least two fluorescent signals.
摘要:
A method for classifying and counting leukocytes comprises the steps of: (1) adding to a hematological sample the following fluorescence-labeled antibodies labeled with fluorescent dyes which emit fluorescences distinguishable from each other; (a) a first fluorescence-labeled antibody (1st antibody) which bonds specifically to leukocytes, (b) a second fluorescence-labeled antibody (2nd antibody) which bonds to at least one kind of neutrophilic cells, and (c) a third fluorescence-labeled antibody (3rd antibody) which bonds to at least one kind of immature granulocytic cells, in order to stain leukocytic cells in the sample, and removing erythrocytes from the sample; (2) analyzing the resulting sample using a flow cytometer to measure at least one scattered light signal and three separate fluorescence signals; (3) defining a group of granulocytic cells on the basis of intensity of the scattered light and intensity of fluorescence from the 1st antibody; (4) defining neutrophilic cells in the defined group of granulocylic cells on the basis of the intensity of the fluorescence from the 1st antibody and intensity of fluorescence from the 2nd or 3rd antibody; (5) classifying the defined group of the neutrophilic cells into groups of neutrophilic cells different in degree of maturity on the basis of the intensity of the fluorescence from the 2nd antibody and the intensity of the fluorescence from the 3rd antibody, and counting the number of cells in each of the groups.
摘要:
Improved method for detecting and/or counting the appearance of hematopoietic progenitor cells which comprises the steps of mixing a blood sample with a reagent capable of detecting immature cells without employing any immunological techniques, obtaining cell information about the thus treated sample using a particle analyzer and constructing a cell distribution profile, delineating a portion of the profile as a zone in which at least one subclass of hematopoietic progenitor cells appear, and counting the cells within the zone. The method is capable of detecting the appearance of hematopoietic progenitor cells in a simple and positive manner.
摘要:
A method for classifying and counting nucleated bone marrow cells comprises the steps of: (1) mixing a sample of bone marrow fluid with an erythrocyte lysing agent to lyse erythrocytes in the sample and render leukocytic cells and erythroid cells in the sample suitable for staining, and staining the sample with a fluorescent dye for producing a difference in intensity of fluorescence between the leukocytic cells and the erythroid cells; (2) introducing the resulting sample to a flow cytometer to detect at least one kind of scattered light and at least one kind of fluorescence; (3) classifying and counting nucleated bone marrow cells, the leukocytic cells and the erythroid cells with use of a difference in the intensity of the fluorescence and the scattered light; (4) calculating the ratio of the nucleated bone marrow cells to the erythroid cells or leukocytic cells from the obtained erythroid cell count or leukocytic cell count and the obtained nucleated bone marrow cell count; and (5) calculating the ratio of the leukocytic cells to the erythroid cells from the erythroid cell count and the leukocytic cell count.
摘要:
Aqueous blood-sample diluting reagent and method of its use for compelling a morphological change in a blood sample to yield an MCV value assayed at elapsed time after the sample is drawn to be consistent within a diagnostically acceptable range with the original, immediate post-drawing MCV value. Selection of a small amount of a predetermined surfactant added within a limited range of concentration, and of a salt for adjusting osmotic pressure of the sample is thereby determined. The blood sample is treated with an anti-coagulant agent immediately post-drawing, and for assay in a particle analyzer at post-drawing elapsed time is diluted with the reagent solution. The reagent has an osmotic pressure (&pgr;) of approximately 150-400 mOsm/kg and a pH of 6.0-8.5. The surfactant is present in a 0.0005% to 0.5% concentration and has a hydrophile-lipophile balance (HLB) of 10-20.
摘要:
Improved method for detecting and/or counting the appearance of hematopoietic progenitor cells which comprises the steps of mixing a blood sample with a reagent capable of detecting immature cells without employing any immunological techniques, obtaining cell information about the thus treated sample using a particle analyzer and constructing a cell distribution profile, delineating a portion of the profile as a zone in which at least one subclass of hematopoietic progenitor cells appear, and counting the cells within the zone. The method is capable of detecting the appearance of hematopoietic progenitor cells in a simple and positive manner.
摘要:
Methods of detecting megakaryocytes are described that include (a) providing a sample that contains a cell; (b) detecting a plurality of morphological information from the cell; (c) generating a scattergram from the plurality of morphological information; and (d) determining whether a population exists in a megakaryocyte region of the scattergram.
摘要:
A reagent for measuring the hemoglobin concentration and counting the number of leukocytes in a blood sample, which contains at least one of a quaternary ammonium salt or a pyridinium salt, having a concentration capable of hemolyzing erythrocytes in the blood and denaturing hemoglobin and at least one of cationic, nonionic or amphoteric surfactants or an oxidant capable of oxidizing heme in hemoglobin, the reagent being capable of dividing leukocytes into two or three fractions, for example, a fraction of lymphocytes, a fraction of monocytes, eosinophils and basophils, and a fraction of neutrophils.
摘要:
A reagent for measurement of leukocytes and hemoglobin concentration in the blood includes a cationic surfactant in an amount sufficient to lyse erythrocytes and denature hemoglobin, at least one of the following hemoglobin stabilizers:(a) sulfosalicylic acid, or its salt, in an amount effective for promoting the conversion of hemoglobin into methemoglobin,(b) 0.2 to 10.0 g/L of a water-soluble chelating agent having a nitrogen atom and a carboxyl group, and(c) piperazine, or its salt, in an amount effective for promoting the conversion of hemoglobin into methemoglobin, anda buffer for maintaining pH at 4 to 6.
摘要:
A reagent for measurement of leukocytes and hemoglobin concentration in the blood includes a cationic surfactant in an amount sufficient to lyse erythrocytes and denature hemoglobin, at least one of the following hemoglobin stabilizers: (a) sulfosalicylic acid, or its salt, in an amount effective for promoting the conversion of hemoglobin into methemoglobin, (b) 0.2 to 10.0 g/L of a water-soluble chelating agent having a nitrogen atom and a carboxyl group, and (c) piperazine, or its salt, in an amount effective for promoting the conversion of hemoglobin into methemoglobin, and a buffer for maintaining pH at 4 to 6.