PMID- 16890264 OWN - NLM STAT- MEDLINE DCOM- 20070821 LR - 20161124 IS - 1874-9968 (Electronic) IS - 0041-624X (Linking) VI - 45 IP - 1-4 DP - 2006 Dec TI - Sonodynamic effects of protoporphyrin IX disodium salt on isolated sarcoma 180 cells. PG - 56-60 AB - The cytotoxic effect of PPIX on isolated sarcoma 180 cells induced by ultrasound was investigated. Tumor cells suspended in air-saturated PBS (pH 7.2) were exposed to ultrasound at 2.2 MHz for up to 60s in the presence and absence of protoporphyrin IX disodium salt (PPIX). The viability of cells was determined by a trypan blue exclusion test. The rate of ultrasonically induced cell damage was increased with 40-160 microM PPIX, while no cell damage was observed with 160 microM PPIX alone. This enhancement of cell damage with PPIX was inhibited by histidine. The participation of lipid peroxidation products in the cell damage process was also investigated. Scanning electron microscope (SEM) observation of the surface of cells was performed to evaluate the morphological changes induced by ultrasonic irradiation. The results indicate the involvement of a sonochemical mechanism. FAU - Liu, Quanhong AU - Liu Q AD - College of Life Science, Shaanxi Normal University, Xi'an, People's Republic of China. lshaof@snnu.edu.cn FAU - Wang, Xiaobing AU - Wang X FAU - Wang, Pan AU - Wang P FAU - Qi, Hao AU - Qi H FAU - Zhang, Kun AU - Zhang K FAU - Xiao, Lina AU - Xiao L LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060720 PL - Netherlands TA - Ultrasonics JT - Ultrasonics JID - 0050452 RN - 0 (Protoporphyrins) RN - 0 (Radiation-Sensitizing Agents) RN - C2K325S808 (protoporphyrin IX) SB - IM MH - Animals MH - Cell Line, Tumor MH - Cell Survival/*drug effects MH - Dose-Response Relationship, Drug MH - Lipid Peroxidation/*drug effects MH - Mice MH - Mice, Inbred ICR MH - Protoporphyrins/*administration & dosage MH - Radiation Tolerance/*drug effects MH - Radiation-Sensitizing Agents/administration & dosage MH - Sarcoma/*metabolism/pathology/*therapy MH - Treatment Outcome MH - Ultrasonic Therapy/*methods EDAT- 2006/08/08 09:00 MHDA- 2007/08/22 09:00 CRDT- 2006/08/08 09:00 PHST- 2006/08/08 09:00 [pubmed] PHST- 2007/08/22 09:00 [medline] PHST- 2006/08/08 09:00 [entrez] AID - S0041-624X(06)00308-8 [pii] AID - 10.1016/j.ultras.2006.06.063 [doi] PST - ppublish SO - Ultrasonics. 2006 Dec;45(1-4):56-60. doi: 10.1016/j.ultras.2006.06.063. Epub 2006 Jul 20.