Efficacy of hypocrellin pharmacokinetics in phototherapy

  • Authors:
    • Seyed Mohamed Ali
    • Malini Olivo
  • View Affiliations

  • Published online on: December 1, 2002     https://doi.org/10.3892/ijo.21.6.1229
  • Pages: 1229-1237
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Abstract

Hypocrellins A and B are pigments which are isolated from the parasitic fungi Hypocrella bambuase sacc and Shiraia bambusicola P. Heen found in the People's Republic of China and other parts of Asia including Sri Lanka. These agents, which belong to the general class of perylene quinonoid pigments, have a long history of traditional medicinal agents especially in Asia. Hypocrellins are under extensive investigation as photosensitizing agents for photodynamic therapy (PDT). Hypocrellin compounds were selected as potential photosensitizers for PDT owing to their high quantum yields of singlet oxygen (1O2), and facility for site-directed chemical modification to enhance phototoxicity, pharmacokinetics, solubility, and light absorption in the red spectral region, among other properties. The cellular uptake, evaluated by spectrofluorimetry and confocal laser scanning microscopy (CLSM) demonstrated that both HA and HB exhibited high and fast uptake and rapid internalization as revealed by their bio-distribution pattern. In addition, the present study employed both immunocytochemical and Western blot techniques to explore the photo-induced expression of apoptosis related proteins in NPC as well as other human carcinoma cells. Using spectrofluorimetry and CLSM we have determined the cellular fluorescence as a marker for the uptake of HA and HB. Co-staining with either HA or HB and fluorescent dyes specific for cell organelles revealed an intracellular localization of HA and HB in lysosomes other than mitochondria.

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December 2002
Volume 21 Issue 6

Print ISSN: 1019-6439
Online ISSN:1791-2423

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Spandidos Publications style
Ali SM and Ali SM: Efficacy of hypocrellin pharmacokinetics in phototherapy. Int J Oncol 21: 1229-1237, 2002
APA
Ali, S.M., & Ali, S.M. (2002). Efficacy of hypocrellin pharmacokinetics in phototherapy. International Journal of Oncology, 21, 1229-1237. https://doi.org/10.3892/ijo.21.6.1229
MLA
Ali, S. M., Olivo, M."Efficacy of hypocrellin pharmacokinetics in phototherapy". International Journal of Oncology 21.6 (2002): 1229-1237.
Chicago
Ali, S. M., Olivo, M."Efficacy of hypocrellin pharmacokinetics in phototherapy". International Journal of Oncology 21, no. 6 (2002): 1229-1237. https://doi.org/10.3892/ijo.21.6.1229