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Proceedings Paper

Effect of Hyp delivery system on PKCα activity: What will happen after pkcα gene silencing and Hyp photo-activation?
Author(s): Matus Misuth; Jaroslava Joniova; Michaela Ferencakova; Pavol Miskovsky; Zuzana Nadova
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Paper Abstract

Low density lipoproteins (LDL) are considered as suitable natural in vivo delivery system for hydrophobic photosensitizers (pts) such as hypericin (Hyp) and it was shown that over expression of LDL-receptors in tumor cells can be used for specific targeting. Activation of pts by irradiation results in a formation of reactive oxygen species (ROS) at the place of light application and starts destructive mechanism. PKCα plays a key role in the cell survival and its overexpression was observed in glioma cell lines. In the present study we aim to present the effectivity of the pts delivery in the glioma cells and consequences of silencing pkcα gene on cell death/survival after Hyp photo-activation. Pts can be delivered through two pathways: endocytosis - when cells are incubated with LDL/Hyp complex and Hyp transport through cellular membrane without any carrier. Preliminary results show that incubation of cells with or without LDL leads to PKCα activation. Photo-activated Hyp seems to be more effective in terms of apoptosis induction when compared to photo-activated LDL/Hyp complex. We have evaluated the influence of photo-activated Hyp on cell death in non-transfected and transfected (PKCα-) human glioma cells (U87-MG). Level of ROS production and type of cell death was notably affected by silencing pkca gene resulting in significant increase of necrosis after Hyp photo-activation.

Paper Details

Date Published: 21 August 2015
PDF: 11 pages
Proc. SPIE 9550, Biosensing and Nanomedicine VIII, 95500J (21 August 2015); doi: 10.1117/12.2188031
Show Author Affiliations
Matus Misuth, Pavol Jozef Šafárik Univ. in Kolšice (Slovakia)
Jaroslava Joniova, Pavol Jozef Šafárik Univ. in Kolšice (Slovakia)
Michaela Ferencakova, Pavol Jozef Šafárik Univ. in Kolšice (Slovakia)
Pavol Miskovsky, Pavol Jozef Šafárik Univ. in Kolšice (Slovakia)
Ctr. for Interdisciplinary Sciences (Slovakia)
Zuzana Nadova, Pavol Jozef Šafárik Univ. in Kolšice (Slovakia)
Ctr. for Interdisciplinary Sciences (Slovakia)

Published in SPIE Proceedings Vol. 9550:
Biosensing and Nanomedicine VIII
Hooman Mohseni; Massoud H. Agahi; Manijeh Razeghi, Editor(s)

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