Abstract: The present invention relates to a kinase inhibitor, comprising a compound of Formula I or a pharmaceutically acceptable salt, solvate, ester, acid, metabolite or prodrug thereof. The present invention also relates to a pharmaceutical composition comprising the kinase inhibitor, and to uses and methods for using these compounds and compositions to inhibit the activity of wild-type FLT3, mutant FLT3-ITD, PDGFR? and/or PDGFR? kinase in a cell or a subject, as well as uses and methods of these compounds and compositions to preventing or treating kinase-associated conditions in a subject.

Abstract: Provided is a culture medium containing amphiregulin for culturing primary breast epithelial cells and a culture method involving using the medium. In the culturing method, primary cells are cultured on a culture vessel coated with an extracellular matrix gel by using the culture medium, and the primary cells grow on the culture vessel, which has been coated with the extracellular matrix gel, and proliferate rapidly under the combined action of nutrient factors and an extracellular matrix contained in the primary cell culture medium. The cell model obtained by the primary cell culture medium and the primary cell culture method can be used for the evaluating the efficacy of and screening drugs.

Abstract: The present application relates to a compound serving as a selective PI3K? kinase inhibitor, comprising the compound shown in formula (I) or a pharmaceutically acceptable salt, solvate, ester, acid, metabolite or prodrug thereof, wherein X, R1, R2, R3, R4, R5 and R6 are as defined in the description. The present application also relates to a method for using the kinase inhibitor to inhibit PI3K? kinase activity or to treat or prevent diseases or conditions associated with tyrosine kinase activity of PI3K?, as well as a use thereof.

Abstract: The present invention relates to a kinase inhibitor, comprising a compound represented by formula (I) or a pharmaceutically acceptable salt, solvate, ester, acid, metabolite or prodrug thereof. The present invention further relates to pharmaceutical compositions comprising the kinase inhibitor, as well as to using said compounds and compositions to inhibit cKIT (especially mutant cKIT/T670I), FLT3 (comprising mutant FLT3-ITD), PDGF, PDGF, and/or VEGFR2 kinase activity in cells or a subject, and/or to a use and method for preventing or treating disorders related to cKIT (especially mutant cKIT/T670I), FLT3 (comprising mutant FLT3-ITD), PDGF, PDGF, and/or VEGFR2 activity in a subject.

Abstract: The present invention relates to a kinase inhibitor, comprising a compound of Formula I or a pharmaceutically acceptable salt, solvate, ester, acid, metabolite or prodrug thereof. The present invention also relates to a pharmaceutical composition comprising the kinase inhibitor, and to uses and methods for using these compounds and compositions to inhibit the activity of wild-type FLT3, mutant FLT3-ITD, PDGFR? and/or PDGFR? kinase in a cell or a subject, as well as uses and methods of these compounds and compositions to preventing or treating kinase-associated conditions in a subject.