Aplikacije pretočne citometrije

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Aplikacije pretočne citometrije April, 2008 polona.bedina@ki.si

Flow cytometry-pretočna citometrija - Merjenje karakteristik celic v tekočini - Podobnost s fluorescenčno mikroskopijo - Analiza kompleksnih celičnih populacij - Sortiranje

Altra

Princip pretočne citometrije

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Side Scatter Laser FALS Sensor 90LS Sensor Purdue University Cytometry Laboratories

Fluorescence Detectors Laser FALS Sensor Freq Fluorescence Fluorescence detector (PMT3, PMT4 etc.) Purdue University Cytometry Laboratories

Aplikacije pretočne citometrije

Primeri uporabe pretočne citometrije - sledenje proteinov imunofluorescenca - analiza krvi - sledenje apoptoze - analiza celic iz tkiv - analiza celičnega cikla - sortiranje

Sledenje proteinov z imunofluorescenco - ugotavljanje specifičnih epitopov na proteinu (npr. aktivost kinaz z uporabo fosfo-specifičnih protiteles)

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Količina mitohondrijev v regeneracijskem tkivu Analiza iz tkivnih c.: tripsin, kolagenaza MitoTracker Green: se veže na M v živih in fiksiranih c. (Goršič M, Zavec AB)

Analiza celičnega cikla G 2 M G 0 Analiza DNA G 1 s C o u n t G 0 G 1 s G 2 M 0 200 400 600 800 1000 2N 4N DNA content Purdue University Cytometry Laboratories

Sledenje poteka mejotične replikacije DNA-PI (Zavec AB, Lešnik U, Komel R, and Comino A: The Saccharomyces cerevisiae gene ECM11 is a positive effecter of meiosis; FEMS Microbiol Lett. 2004)

Celični cikel in poliploidnost DNA-PI Wt Small Big (undergoing review - Nikitin D, Tosato V, Zavec AB, and Bruschi CV: Cellular and molecular effects of chromosome translocations in Saccharomyces cerevisiae) Val

Sortiranje Fluorescence Activated Cell Sorting (FACS) 488 nm laser FALS senzor detektorji fluorescence nabiti plošči 2000-6000 V - + posamezne celice sortirane v kiveti Purdue University Cytometry Laboratories

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Prednosti pretočne citometrije visoka občutljivost metode izjemno hitro zaznavanje več parametrov hkrati: velikost, granuliranost, fluorescenca: velika in nesubjektivna statistika največkrat gre za meritve na živih celicah zaznavanje lastnosti posameznih celic: identifikacija celičnih podskupin v kompleksni populaciji

Aplikacije pretočne citometrije April, 2008 polona.bedina@ki.si