Cellular uptake, localization and photodynamic effects of haematoporphyrin derivative in human glioma and squamous carcinoma cell lines

Seema Gupta, B. S. Dwarakanath, K. Muralidhar, V. Jain

Research output: Contribution to journalReview article

31 Scopus citations


Uptake, intracellular concentration, localization and photodynamic effects of a haematoporphyrin derivative (HpD, Photosan-3) were compared in human glioma (BMG-1, wild-type p53) and squamous carcinoma (4451, mutated p53) cell lines. Concentration and time dependence of cellular uptake of HpD was assayed from methanol extracts and whole cell suspension spectroscopy, while localization was studied by fluorescence microscopy-based image analysis. Colony-forming ability, apoptosis, cell-cycle progression and cytogenetic damage (micronuclei formation) were investigated as parameters of photodynamic response following irradiation with red light. BMG-1 cells were more sensitive to the photodynamic treatment than 4451 cells, although the 4451 cells accumulated a higher amount of HpD and did not differ significantly from BMG-1 cells with respect to intracellular localization. Photodynamically-induced cytogenetic damage and apoptosis were considerably higher in BMG-1 cells as compared to 4451 cells. The present results strongly suggest that manifestation of the photodynamically-induced lesions in the form of cytogenetic damage and apoptosis are among the important determinants of cellular sensitivity to HpD-PDT besides the photodynamic dose (intracellular concentration of the photosensitizer and the light dose).

Original languageEnglish (US)
Pages (from-to)107-120
Number of pages14
JournalJournal of Photochemistry and Photobiology B: Biology
Issue number2
Publication statusPublished - Feb 2003



  • Apoptosis
  • Cytogenetic damage
  • Haematoporphyrin derivative
  • Intracellular localization
  • Photodynamic therapy
  • p53

ASJC Scopus subject areas

  • Radiation
  • Radiological and Ultrasound Technology
  • Biophysics
  • Radiology Nuclear Medicine and imaging

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