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Optical microscopy to study the role of cytoskeleton in cell locomotion and virus trafficking
Difato, Francesco ; Forstová, Jitka (advisor) ; Hozák, Pavel (referee) ; Plášek, Jaromír (referee)
3. General conclusions 150 The interest in optical microscopy is constanly growing, mainly because of its unique features in examining biological systems in four dimensions (x-y-z-t)1 . The work presented here was focused on biological applications of optical microscopy by exploring and improving the spatial and temporal resolution performances and by futher developing optical tools for manipulating biological samples. First, I studied the resolution performances of the system in the three dimensional space and I contributed in improving the experimental spatial resolution of microscope by applying deconvolution. In this respect, theoretical modelling can characterize the image formation process of the microscope, but only experimental measurement of the PSF can quantify the limitations of the real system. Indeed, experimental PSF presents shape assymetry due to spherical aberrations introduced by optical elements, while theoretical PSF is symmetric and account only for the resolution limits of an ideal imaging system. The disadvantage of experimental PSF is that could be corrupted by noise, otherwise deconvolution with the theoretical PSF offer only a qualitative improvement of the image, because the introduced artefacts cannot be quantified. Deconvolution of the acquired data with experimental PSF...
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Multivalentní glykomika v imunoterapii experimentálních nádorů
Vannucci, Luca ; Pospíšil, Miloslav ; Krist, Pavel ; Křen, Vladimír ; Huliková, Katarína ; Luptovcová, Martina ; Svoboda, Jan ; Kuldová, Markéta ; Bezouška, Karel ; Rossmann, Pavel ; Difato, Francesco ; Mosca, F. ; Fišerová, Anna
Lectin-like receptors can modulate the cytotoxic, regulatory and dendritic cell responses by their interactions. GN8 multivalent glycoconjugates are able to internalize inside and activate NKR-P1 positive cells inducing production of IFN-gamma and expression of CD69. The final effect is a modulation of anticancer immunity with reduction of cancer growth
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Imunomodulační glykodendrimery mají afinitu k endoteliím nádorových a embryonálních cév. Mikroskopické průkazy a perspektivy využití
Vannucci, Luca ; Fišerová, Anna ; Krist, Pavel ; Křen, Vladimír ; Huliková, Katarína ; Luptovcová, Martina ; Rossmann, Pavel ; Difato, F. ; Mosca, F. ; Pospíšil, Miloslav
Glycodendrimers coated with N-acetyl-glucosamine and labeled with a fluorescent dye demonstrate special tropism to neogenerated endothelia in cancer capillaries. Same distribution was observed by confocal microscopy in the new vessels of rat embryo abdominal wall, as in placenta and yolk sack endothelia. Results suggests the presence of a commun target on evoluting endothelia, the nature of which is under investigation.
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