Sekisui Medical Co., Ltd.

Daiichi Pure Chemicals Co., Ltd.

Eidia Co., Ltd.

Mitsuaki Yamamoto

Koji Kobayashi

Osamu Miyazaki

Motoki Morita

Mayumi Yoshida

Shinya Yokokawa

Tomo Shimizu

Keigo Kono

Mitsuhiro Nakamura

Shoko Yamamoto

Junichi Kondou

Keigo Kohno

Kazunori Saito

Mitsuhisa Manabe

Yuriko Taniguchi

Marie Asami

Koji Ushizawa

Kazuo Nakanishi

Kumiko Yuki

Michiko Kawamoto

Tadaaki Yoshida

Chizuru Morikawa

Yasushi Nakamura

Akiko Suzuki

Kengo Fujimura

Tomohisa Nishio

Chie Kaneko

Yoko Ikeda

Takuji Matsumoto

Remi Nakamura

Kanami Niiyama

Satoko Seo

Mieko Ota

A method for avoiding the influence of a blood sample on a measurement error in a latex agglutination immunoassay. The measurement error caused by a blood sample in a latex agglutination immunoassay can be reduced by a method which includes a step of bringing the sample into contact, in a liquid phase, with latex particles carrying a substance having a specific affinity for an analyte in the presence of imidazole.

Method for reducing measurement error in latex agglutination immunoassay

A problem of the present invention is to provide an immunochromatographic test strip avoiding agglutination of colloidal gold while red blood cells in whole blood are agglutinated and then separated and removed in the case of using polybrene as a hemagglutinating agent and the colloidal gold conjugates as a detection reagent, and to provide immunochromatography using the test strip. To solve the problem, the present inventors reviewed the composition of the existing reagent itself from a completely different viewpoint rather than the selection of type or amount of polyanions, and as a result of extensive study on each element, the inventors surprisingly found that agglutination of colloidal gold may be suppressed by using a particular additive without neutralization by polyanions.

Immunochromatographic test strip for detecting object in red blood cell-containing sample and immunochromatography using the test strip

A problem to be solved by the present invention is to provide an immunochromatographic test strip and a detection method using immunochromatography avoiding aggregation of colloidal gold conjugates while red blood cells in whole blood are agglutinated and then separated and removed in the case of using polybrene as a blood-agglutinating agent and the colloidal gold conjugates as a detection reagent. To solve the problem, the present inventers reviewed a past reagent configuration itself from a completely different viewpoint rather than selecting type and amount of polyanions and, as a result of extensive study on each element, the inventers surprisingly found that aggregation of colloidal gold can be suppressed by using a certain buffer solution without using neutralization by polyanions.

Immunochromatographic test strip and detection method using immunochromatography for detecting object in red blood cell-containing sample

A problem to be solved by the present invention is to provide an immunochromatographic test strip and a detection method using immunochromatography avoiding aggregation of colloidal gold conjugates while red blood cells in whole blood are agglutinated and then separated and removed in the case of using polybrene as a blood-agglutinating agent and the colloidal gold conjugates as a detection reagent. To solve the problem, the present inventors reviewed a past reagent configuration itself from a completely different viewpoint rather than selecting type and amount of polyanions and, as a result of extensive study on each element, the inventors surprisingly found that aggregation of colloidal gold can be suppressed by using a certain buffer solution without using neutralization by polyanions.

Immunochromatographic test strip and detection method using immunochromatography for detecting target in red blood cell-containing sample

A problem to be solved by the present invention is to inhibit a nonspecific agglutination reaction in an agglutination test using a monoclonal antibody having a property of specifically biding to PIVKA-II and a monoclonal antibody having a property of specifically biding to prothrombin as well as two types of carrier particles carrying these monoclonal antibodies. The nonspecific agglutination reaction can be inhibited by adding certain divalent metal ions to a reaction solution containing the monoclonal antibody having a property of specifically biding to PIVKA-II and the monoclonal antibody having a property of specifically biding to prothrombin as well as the two types of carrier particles carrying these monoclonal antibodies.

Method of inhibiting nonspecific reaction in PIVKA-II assay reagent

A method for measuring blood coagulation, including: preparing a reaction solution including a plasma specimen, a blood coagulation activator, and at least one of amino-guanidine and an acid addition salt thereof; and measuring blood coagulation time by detecting a turbidity change in the reaction solution.

Method for measuring blood coagulation

The present invention provides an insulin-specific assay and an assay reagent capable of sensitively and specifically assaying insulin using an antibody having a property of reacting with insulin bound to an anti-insulin antibody while not reacting with insulin not bound to an anti-insulin antibody, without being affected by proinsulin and insulin analogs.

Insulin assay

[PROBLEMS] To provide a reagent for measuring agglutination by using a reaction accelerator, which causes no spontaneous agglutination of receptor-sensitized carrier particles in the coexistence of these carrier particles, and a measurement method. [MEANS FOR SOLVING PROBLEMS] A reagent for measuring agglutination by using a specific amine compound, whereby aggregation based on a specific reaction can be accelerated without causing spontaneous agglutination of carrier particles, and measurement method.

Reagent for measuring agglutination and method of measuring agglutination

The present invention aims to provide an assay reagent and an assay for accurately measuring KL-6, in particular, an assay reagent and an assay for accurately measuring KL-6 in samples containing a rheumatoid factor and/or a nonspecific substance other than the rheumatoid factor. KL-6 in samples that contain a rheumatoid factor and/or a nonspecific substance other than the rheumatoid factor can be accurately measured using an immunoassay reagent comprising a solution at a pH of 4.0 to 5.5 containing a rheumatoid factor interference inhibitor and a solution of an insoluble carrier on which anti-KL-6 antibodies are immobilized.

Immunoassay reagent for KL-6 assay

A method for enhancing measurement sensitivity or avoiding hemoglobin influence in a latex agglutination or metal agglutination immunoassay method of a target antigen in a biological sample that uses calixarene in the immunoassay.

Method for enhancing sensitivity or method for avoiding influence of hemoglobin in immunological measurement

Growing community of inventors

Tokyo, Japan

Mitsuaki Yamamoto