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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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Interakce glycodendrimérů s nádorovým mikroprostředím
Pospíšil, Miloslav ; Vannucci, Luca ; Luptovcová, Martina ; Svoboda, Jan ; Huliková, Katarína ; Kuldová, Miloslava ; Bezouška, Karel ; Krist, Pavel ; Pešta, M. ; Fišerová, Anna
Potentiation of immunological parameters by multivalent glycodendrimers (PAMAM-GlcNAc8) against experimental mouse melanoma and rat colon or glioma cancer. PAMAM –GlcNAc8 induce biological effects at different levels of cancer microenvironmental components and concern both, effector and cancer cells
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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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Interakce glykodendrimerů s nádorovým mikroprostředím
Pospíšil, Miloslav ; Vannucci, Luca ; Luptovcová, Martina ; Svoboda, Jan ; Huliková, Katarína ; Kuldová, Markéta ; Fišerová, Anna
During carcinogenesis and cancer development tissues undergo to important modifications with creation of a specific cancer microenvironment. Locally, the immune system is challenged by tumor-secreted active biological molecules (eg. cytokines, growth factors, NO, lactic acid) that can impair the activation of an effective anticancer response. The use of glycodendrimers targeting immune cells of innate immunity can rescue the activation and stimulate the immune responses, operating through lectin-like receptors.
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Úloha sacharidových struktur v NKR-P1 zprostředkované interakci efektorových a cílových buněk
Fišerová, Anna ; Svoboda, J. ; Kuldová, Markéta ; Pucová, Alexandra ; Bezouška, Karel ; Pesta, M. ; Vannucci, Luca ; Pospíšil, Miloslav
Masking oligosaccharide sequences can assist transformed cells to escape immune surveillance. N-acetyl-glucosamine coated dendrimers have binding affinity for NKR-P1 receptor and can also modify cancer cell glycosylation profile. Effects of treatment on immune cell subpopulations were analyzed in blood, lymphoid tissues and organs, and inside tumor in B16F10 melanoma bearing mice. Treatment enhanced tumor cell immunogenicity, and induced maturation,differentiation and homing of cytotoxic cells to tumor microenvironment.
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