Abstract: Disclosed is a method for acquiring information on exacerbation risk of COVID-19, comprising measuring IgM antibody against S antigen of SARS-CoV-2 contained in a specimen collected from a subject infected with SARS-CoV-2 or a subject suspected of suffering from COVID-19, wherein a value obtained by the measurement of IgM antibody serves as an index of exacerbation risk of COVID-19 of the subject.

Abstract: Provided is a method for forecasting arrival of a drug inside a diseased tissue before administration of the drug to a patient. The present invention includes a method for forecasting, in a diseased tissue in which a biomarker A derived from a diseased cell is expressed, arrival of a drug targeting the biomarker A inside the diseased tissue, the method including a step B for acquiring information on expression of a biomarker B derived from a non-diseased cell adjacent to or close to the diseased cell.

Abstract: The invention relates methods of identifying and predicting inter-patient differences in prognostic prediction for survival in androgen independent prostate cancer. It further related to methods for determining and exploiting such differences to improve medical outcomes. Moreover, it provides methods for determining if a subject has prostate cancer.

Abstract: There are numerous proteins having different in vivo effects depending on variants. In order to gain a more accurate understanding of an in vivo effect of a protein, when the protein in a sample is quantified, it is necessary to measure an amount of each variant that can be present. Provided is a method for performing parallel quantification of variants of a protein having 2 or more variants using mass spectrometry. The method includes: protease-digesting a protein in a sample; detecting, using mass spectrometry, among peptides obtained by the protease digestion, peptides having amino acid sequences specific to the variants without separating the peptides; and determining amounts of the variants in the sample based on results of the detection.

Abstract: The present invention provides a method for quantifying a monoclonal antibody, the method including: a step of performing selective protease digestion of a monoclonal antibody as a measurement target by bringing a porous body in which the monoclonal antibody is immobilized in pores into contact with fine particles onto which a specific protease is immobilized; and a step of detecting a peptide fragment that is obtained from the digestion and contains an amino acid derived from a CDR2 region of a heavy chain or a light chain of the monoclonal antibody.

Abstract: The invention relates methods of identifying and predicting inter-patient differences in prognostic prediction for survival in androgen independent prostate cancer. It further related to methods for determining and exploiting such differences to improve medical outcomes. Moreover, it provides methods for determining if a subject has prostate cancer.