The punctate dots observed in HeLa cells and primary macrophages represent a classical sign of particles localized in cellular compartments such as caveolea pits or early endosomes.
Exclusion of the envelope plasmid encoding VSV-G during the vector production resulted in p24 and RNA titers comparable to those of a normal vector production, whereas the functional titer remained below detection limit (TU/ml), inferring the generation of vector particles defective in cellular uptake.
Essentially similar results were obtained when the viral particles in the cellular supernatants were measured using a semi-quantitative PCR-based assay (Figure 2E).
In vitro studies have also been carried out with the GSS nanoparticles to assess the functional ability of the particles in the cellular environment.
The researchers were surprised to find that most of the particles in the cellular cytoplasm were not attached to the membrane, as would have been expected if the particles had been encapsulated through endocytosis or phagocytosis.
The probability, P n, of finding n particles in a cellular vesicle is described by a biexponential decay function of the form with parameter values of, a1 = 0.103, b1 = 6 × 10 3, a2 = 0.017, b2 = 4 × 10 4.
HDL resecretion could be linked to cholesterol efflux, since resecreted HDL particles were enriched in cellular cholesterol [29].
The readily controllable sizes, plus cell's attraction potentials of the LDH particle played role in cellular distribution and uptake.
Ultrafine particles in LA induced cellular heme oxygenase-1 expression and depleted intracellular glutathione, both important in oxidant stress responses, and were also shown to localize in mitochondria where they induce major structural damage which may also contributive to oxidative stress [ 49].
These digitized particles are developed for and used in cellular automata systems, which are employed for the simple mathematical idealizations of complex systems in physics, chemistry and engineering [S. Wolfram, Rev. Mod. Phys. 55, 601 644 (1983)].
