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The effect of EDTA and serum on endogenous porphyrin accumulation and photodynamic sensitization of human K562 leukemic cells.
TLDR
The higher porphyrin cellular content under EDTA and 5-ALA induction was exploited to photoinactivate the human leukemic cells by more then 3 orders of magnitude. Expand
Dopamine-melanin is actively phagocytized by PC12 cells and cerebellar granular cells: possible implications for the etiology of Parkinson's disease
TLDR
It is suggested that neuromelanin can be phagocytised by neuronal cells which may thus be subjected to its toxic effects and contribute to the understanding of the formation and disposition of neuromalanin and its possible role in the etiology of Parkinson's disease. Expand
Bactericidal effects of photoactivated porphyrins--an alternative approach to antimicrobial drugs.
TLDR
Resistance of Gram negative bacteria to porphyrin photosensitization is the main impediment to its use as a broad spectrum antibacterial method. Expand
Ultrastructure, autofluorescence, callose deposition and lignification in susceptible and resistant muskmelon leaves infected with the powdery mildew fungus Sphaerotheca fuliginea.
TLDR
Electron microscopical studies revealed that the rapid collapse of epidermal cells in the resistant cultivars was accompanied by the accumulation of callose-like deposits in cell walls and around haustoria, electron-opaque deposits in the plasma membrane and electron- opaque deposits between the cell wall and the plasma membranes. Expand
Collapse of K+ and ionic balance during photodynamic inactivation of leukemic cells, erythrocytes and Staphylococcus aureus.
TLDR
The prevailing K loss in FELC, erythrocytes and bacteria during the first minutes of photosensitization is deduced to be an immediate primary consequence of the photodynamic effect, while other ionic changes are joined in order with the development of cellular damage. Expand
Stimulation of Friend erythroleukemic cell cytodifferentiation by 5-amino levulinic acid; porphyrins, cell size, segregation of sialoglycoproteins, and nuclear translocation.
TLDR
The enhanced stimulation of Friend cells by 5-ALA promoted an advanced step of erythroid maturation that has much in common with the late events of normal nuclear extrusion process. Expand
Ultrastructure of Pseudoperonospora cubensis in muskmelon genotypes susceptible and resistant to downy mildew
TLDR
It is proposed that the containment of host cells and haustoria by callose- and lignin-like materials may interrupt the flow of nutrients from and into the invaded host cells. Expand
ULTRASTRUCTURAL STUDIES OF CYANIDWM CALDARIUM: CONTRIBUTION TO PHYLOGENESIS
TLDR
The aim was to demonstrate that terrestrial photosynthetic organisms are able to tolerate and survive extreme conditions such as were believed to exist on Venus polar 11 such organisms had to indicate growth in an atmosphere of pure CO, and at elevated temperature and pressure, as well as in a very acidic media. Expand
Mesosomal structures and antimicrobial activity induced by hemin oxidation or porphyrin photodynamic sensitization inStaphylococci
The porphyrin-dependent inactivation ofStaphyloccocus aureus and the induction of mesosomal structures are described. The antimicrobial activity of different photoactivated porphyrins was comparedExpand
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