Open AccessSynergistic Effect of Ultrasound and Hematoporphyrin on Sarcoma 180
Author(s) -
Yumita Nagahiko,
Nishigaki Ryuichiro,
Umemura Koshiro,
Umemura Shinichiro
Publication year - 1990
Publication title -
japanese journal of cancer research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.035
H-Index - 141
eISSN - 1349-7006
pISSN - 0910-5050
DOI - 10.1111/j.1349-7006.1990.tb02565.x
Subject(s) - hematoporphyrin , sarcoma , photosensitizer , sensitization , medicine , pharmacology , ratón , cancer research , chemistry , photodynamic therapy , pathology , immunology , organic chemistry
The antitumor effects of combined use of ultrasound (US) and a photosensitizer, hematoporphyrin (Hp), were determined in mice bearing sarcoma 180. In order to find the optimum timing of the US irradiation after the administration of Hp, the Hp concentrations in the tumor and in the plasma were determined and were analyzed pharmacokinetically. Antitumor effects were evaluated by measuring the tumor size and the tumor weight. Hp alone showed no antitumor effect but US alone showed a slight antitumor effect. The combined treatment with US and Hp showed marked synergistic effects on sarcoma 180 (inhibition ratio was 74% of the control). From these results, the enhancement of antitumor effect is thought to be caused by the sensitization of tumor cells to US mediated by Hp.