In vitro behavior of Porfimer sodium and Talaporfin sodium with high intensity pulsed irradiation

Sayaka Ohmori, Tsunenori Arai

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

We studied pulse energy density dependence of two distinctive clinical photosensitizers, Porfimer sodium and Talaporfin sodium, in terms of oxygen consumption, photodegradation in these photosensitizer solutions, and rat prostate cancer cell line photocytotoxicity. The transient transmittances during the pulsed irradiation to these photosensitizer solutions were measured with the pulse energy densities ranging from 0.31 to 31 mJ/cm2. We revealed that Talaporfin sodium was easier to produce absorption saturation than Porfimer sodium. The significant suppression of Talaporfin sodium mediated oxygen consumption, photodegradation, and photocytotoxicity which were observed with pulse energy densities increasing from 0.5 to 10 mJ/cm2. This result could be mainly attributed to absorption saturation. On the other hand, Porfimer sodium did not display significant absorption saturation with the pulse energy densities ranging from 0.31 to 31 mJ/cm2. The photodegradation mechanism for Porfimer sodium changed at high pulse energy density. This phenomenon might accelerate the photodegradation and cause the photocytotoxicity suppression.

Original languageEnglish
Pages (from-to)213-223
Number of pages11
JournalLasers in Medical Science
Volume21
Issue number4
DOIs
Publication statusPublished - 2006 Dec

Fingerprint

Dihematoporphyrin Ether
Photolysis
Photosensitizing Agents
Oxygen Consumption
Prostatic Neoplasms
Cell Line
In Vitro Techniques
Talaporfin

Keywords

  • Absorption saturation
  • Photodynamic therapy
  • Porfimer sodium
  • Pulsed irradiation
  • Talaporfin sodium

ASJC Scopus subject areas

  • Medicine (miscellaneous)
  • Surgery

Cite this

In vitro behavior of Porfimer sodium and Talaporfin sodium with high intensity pulsed irradiation. / Ohmori, Sayaka; Arai, Tsunenori.

In: Lasers in Medical Science, Vol. 21, No. 4, 12.2006, p. 213-223.

Research output: Contribution to journalArticle

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