By Stefano Bellucci
This is often the 1st quantity in a sequence of books on chosen themes in Nanoscale technology and expertise according to lectures given on the recognized INFN colleges of an identical identify. the purpose of this assortment is to supply a reference corpus of appropriate, introductory fabric to appropriate subfields, as they mature over the years, via collecting the considerably elevated and edited models of instructional lectures, given through the years through across the world identified specialists. the current set of notes leads to specific from the participation and commitment of prestigious academics, similar to Vincenzo Balzani, Santina Carnazza, Andrea Salis Barbara Panessa-Warren and Stefano Bellucci. As traditional, the lectures have been accordingly rigorously edited and transformed, taking into consideration the broad follow-up discussions.
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Additional info for Nanoparticles and Nanodevices in Biological Applications: The INFN Lectures - Vol I (Lecture Notes in Nanoscale Science and Technology)
The DNA-wrapping of the nanotubes may have facilitated cellular uptake of the smaller SWCNTs as well. Our own work with DNAfunctionalized gold nanoparticles revealed that nanoparticles were rapidly bound to the plasma membrane and incorporated into both human colon and lung cells following 2-hour exposure. However, there was no visible evidence of endocytic vesicle formation, or some form of phagocytosis. These DNA functionalized gold nanoparticles were found in the apical cytoplasm, or localized within endoplasmic (ER) reticulum-like tubular channels at the apical surface .
Individual cells containing single or clustered 10 nm Au nanoparticles often lacked intact vacuolar and organellar membranes. Membranes of the nuclei, mitochondria and endoplasmic reticulum were not visible within the cells, however the cells remained attached to the substrate and did not show signs of apoptosis. Often nanoparticles were seen in small membrane-limited vesicles in the central and basal cytoplasm of the cells, suggesting endosomal transport of the nanoparticles. The destruction within these cells was severe, yet by viability testing (vital staining), the cells incubated with 10 nm citrate capped nanoparticles showed no significant necrosis compared to control values, even after 3-hour incubation.
5 hours (Fig. B), the nanoparticles (arrows) entered the apical cell surface and passed into intracellular channels (ER) and were seen within central (V) vacuoles (Fig. B) and later in basal vacuoles at 3-hour incubation Fig. C). Numerous channels parallel to the basal cell surface (lines point to channels, Fig. C) contained nanodots, with aggregates excreted at the basal surface (arrows, Fig. C) Golgi apparatus  and into vacuoles located centrally in the cell (Fig. 23B). The Au nanoparticles could be seen as discrete electron dense dots in the lower basal vacuoles of the cell.