RU2012143991A - METHOD FOR DETERMINING NON-SPECIFIC STABILITY OF PATHOGENIC MICROORGANISMS TO ANTIBIOTICS ON THE BASIS OF MEASURING THE CATALYTIC ACTIVITY OF PHOSPHODYESTERASES, CRIMPING CYCLIC DYNOFINOSIS - Google Patents

METHOD FOR DETERMINING NON-SPECIFIC STABILITY OF PATHOGENIC MICROORGANISMS TO ANTIBIOTICS ON THE BASIS OF MEASURING THE CATALYTIC ACTIVITY OF PHOSPHODYESTERASES, CRIMPING CYCLIC DYNOFINOSIS Download PDF

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RU2012143991A
RU2012143991A RU2012143991/10A RU2012143991A RU2012143991A RU 2012143991 A RU2012143991 A RU 2012143991A RU 2012143991/10 A RU2012143991/10 A RU 2012143991/10A RU 2012143991 A RU2012143991 A RU 2012143991A RU 2012143991 A RU2012143991 A RU 2012143991A
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phosphodiesterase
complexes
gmp
specific
target
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RU2012143991/10A
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RU2518249C1 (en
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Александр Владимирович Колесников
Арина Владимировна Козырь
Игорь Георгиевич Шемякин
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Федеральное государственное бюджетное учреждение науки институт биоорганической химии им. академиков М.М. Шемякина и Ю.А. Овчинникова Российской академии наук (ИБХ РАН)
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Abstract

Способ определения неспецифической устойчивости патогенных микроорганизмов к антибиотикам и факта присутствия бактериальных биопленок на основании измерения каталитической активности фосфодиэстераз, расщепляющих циклический дигуанозинмонофосфат, включающий:1) формирование иммунных комплексов между фосфодиэстеразой-мишенью и биотинилированным антителом или иным аффинным лигандом, модифицированным биотином и специфичным к некаталитическим доменам фосфодиэстеразы;2) аффинную очистку комплексов, сформированных фосфодиэстеразой-мишенью и биотинилированным антителом или иным аффинным лигандом, модифицированным биотином, при помощи парамагнитных частиц, содержащих нейтравидин или его аналоги, связывающие биотин;3) взаимодействиекомплексов фосфодиэстеразабиотинилированноеантитело, иммобилизованных на парамагнитных частицах, с комплексами, содержащими с-di-GMP в форме G-квадруплексов с интеркалированным красителем, сопровождающееся падением интенсивности флуоресценции по мере разрушения комплексов интеркалирующего красителя c-di-GMP;4) измерение падения флуоресценции при гидролизе c-di-GMP и разрушении комплекса c-di-GMP с интеркалирующим красителем с последующим количественным определением активности фосфодиэстеразы на основании калибровочных кривых, построенных с использованием известных количеств рекомбинантного фермента фосфодиэстеразы, идентичного исследуемой мишени.A method for determining the nonspecific resistance of pathogenic microorganisms to antibiotics and the fact of the presence of bacterial biofilms based on the measurement of the catalytic activity of phosphodiesterases that cleave cyclic diguanosine monophosphate, including: 1) the formation of immune complexes between the target phosphodiesterase and a biotinylated specific non-specific and specific affinity specific phosphodiesterase; 2) affinity purification of complexes formed by phosphodiesterase- with a target and a biotinylated antibody or other affinity ligand modified with biotin, with the help of paramagnetic particles containing neutravidin or its analogues that bind biotin; 3) the interaction of phosphodiesterase-biotinylated antibody complexes immobilized on paramagnetic particles with GM complexes containing G-groups with di with intercalated dye, accompanied by a decrease in fluorescence intensity as the complexes of the intercalating dye c-di-GMP are destroyed; 4) measurement of the fluorescence drop In the course of hydrolysis of c-di-GMP and destruction of the complex of c-di-GMP with an intercalating dye, followed by quantitative determination of phosphodiesterase activity based on calibration curves constructed using known amounts of the recombinant phosphodiesterase enzyme identical to the target under study.

Claims (1)

Способ определения неспецифической устойчивости патогенных микроорганизмов к антибиотикам и факта присутствия бактериальных биопленок на основании измерения каталитической активности фосфодиэстераз, расщепляющих циклический дигуанозинмонофосфат, включающий:A method for determining the non-specific resistance of pathogenic microorganisms to antibiotics and the fact of the presence of bacterial biofilms based on the measurement of the catalytic activity of phosphodiesterases that break down cyclic diguanosine monophosphate, including: 1) формирование иммунных комплексов между фосфодиэстеразой-мишенью и биотинилированным антителом или иным аффинным лигандом, модифицированным биотином и специфичным к некаталитическим доменам фосфодиэстеразы;1) the formation of immune complexes between the target phosphodiesterase and a biotinylated antibody or other affinity ligand modified with biotin and specific for non-catalytic phosphodiesterase domains; 2) аффинную очистку комплексов, сформированных фосфодиэстеразой-мишенью и биотинилированным антителом или иным аффинным лигандом, модифицированным биотином, при помощи парамагнитных частиц, содержащих нейтравидин или его аналоги, связывающие биотин;2) affinity purification of complexes formed by target phosphodiesterase and biotinylated antibody or other biotin-modified affinity ligand using paramagnetic particles containing neutravidin or its biotin-binding analogues; 3) взаимодействие комплексов фосфодиэстераза/биотинилированное антитело, иммобилизованных на парамагнитных частицах, с комплексами, содержащими с-di-GMP в форме G-квадруплексов с интеркалированным красителем, сопровождающееся падением интенсивности флуоресценции по мере разрушения комплексов интеркалирующего красителя c-di-GMP;3) interaction phosphodiesterase complexes/biotinylated an antibody immobilized on paramagnetic particles with complexes containing c-di-GMP in the form of G-quadruplexes with an intercalated dye, accompanied by a decrease in fluorescence intensity as the complexes of the intercalating dye c-di-GMP are destroyed; 4) измерение падения флуоресценции при гидролизе c-di-GMP и разрушении комплекса c-di-GMP с интеркалирующим красителем с последующим количественным определением активности фосфодиэстеразы на основании калибровочных кривых, построенных с использованием известных количеств рекомбинантного фермента фосфодиэстеразы, идентичного исследуемой мишени. 4) measurement of the fluorescence drop upon c-di-GMP hydrolysis and destruction of the c-di-GMP complex with an intercalating dye, followed by quantitative determination of phosphodiesterase activity based on calibration curves constructed using known amounts of the recombinant phosphodiesterase enzyme identical to the target under study.
RU2012143991/10A 2012-10-16 2012-10-16 Method of determining nonspecific resistance of pathogenic microorganisms to antibiotics based on measuring catalytic activity of phosphodiesterases cleaving cyclic diguanosine monophosphate RU2518249C1 (en)

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