Highway to hell Intercellular spread of viruses via nanotubular highways?
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1 Highway to hell Intercellular spread of viruses via nanotubular highways? Dr. Amin Rustom
2 The discovery of tunneling nanotubes A new type of intercellular communication... Rustom et al. Science 2004 Cultured rat Pheochromocytoma-Cells (PC12), analysed by high resolution 3D microscopy - plasmamembrane staining with wheat germ agglutinin
3 The characterization of TNTs TNTs represent extremely sensitive structures... Rustom et al. Science 2004 Cultured rat Pheochromocytoma-Cells, plasmamembrane staining with wheat germ agglutinin - videomicroscopic analysis with excitation at 565 nm
4 The characterization of TNTs TNTs mediate membrane continuity... Rustom et al. Science 2004 Cultured rat Pheochromocytoma-Cells (PC12), analysed by transmission electron microscopy
5 The characterization of TNTs TNTs can be formed de novo... Rustom et al. Science 2004 Cultured rat Pheochromocytoma-cells - time laps videomicroscopic analysis
6 The characterization of TNTs TNTs can be formed de novo... Rustom et al. Science 2004 Cultured rat Pheochromocytoma-cells - time laps videomicroscopic analysis
7 The characterization of TNTs TNTs can be formed de novo... Rustom et al. Science 2004 Cultured rat Pheochromocytoma-cells - time laps videomicroscopic analysis
8 The TNT model A new principle of intercellular communication... Rustom et al. Science 2004
9 The physiological relevance of nanotubes... Examples from around 130 citations... TNTs and the immune system They fulfill important functions at a.o. the Immunological Synapse e.g. intercellular transfer of MHC molecules or Ca 2+ signals Watkins S.C. et al. 2005
10 The physiological relevance of nanotubes... Examples from around 130 citations... TNTs and cancer biology They are involved in intercellular communication of different tumor cells e.g. transfer of tumor-resistence proteins or vesicles Vidulescu Watkins C. S.C. et al. et 2004 al. 2005
11 The physiological relevance of nanotubes... Examples from around 130 citations... TNTs in developmental biology and stem cell differentiation They can fulfill important functions during a.o. differentiation of stem cells e.g. speculations about RNA transfer Koyanagi M. et al. 2005
12 The current nanotube model Formation... Daniel M. Davis et al. Nature Reviews 2008
13 The current nanotube model Function... Daniel M. Davis et al. Nature Reviews 2008
14 Reactions of different cell-systems Surprising similarities after the expression of viral proteins... animal Expression of Viral protein plant Expression of Alfalfa Mosaik Virus Movement Protein (AMV MP) Jesús A. Sánchez-Navarro et al. Molecular Plant-Microbe Interactions; 14(9): ) 2001
15 Comparison between TNTs and Plasmodesmata Striking similarities... animal plant
16 New aspects for the evolution of multicellular organisms? Volvox A colony of green algae and model system for the development of multicellular organisms... Human monocyte-derived macrophages Önfeld et al. J. Immunologie 2006
17 A conserved mechanism throughout evolution? Bacterial conjugation Transfer of genetic information along cytoplasmic bridges...
18 Nanotubes: Far from beeing understood... Cultured rat Pheochromocytoma-Cells ( any disturbance avoided )
19 Acknowledgements Collaborations and Interactions Professor Dr. Hans Hermann Gerdes (Universität Bergen, Norwegen) Professor Dr. Hilmar Bading (Institut für Neurobiologie, Heidelberg) Professor Dr. Joachim Spatz (Physikalische Chemie, Heidelberg und Max Planck Institut, Stuttgart) ITIS Foundation (Schweiz) TillPhotonics (Gräfelfing) und Olympus (Hamburg) Professor Dr. Robinson (Pflanzenphysiologie, Universität Heidelberg) Professor Volker Storch (Zoologie, Universität Heidelberg) Dr. Momburg (DKFZ, Heidelberg) Collegues from the Lab Sigrid Riese Marcus Abel Thanks for your attention!
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