Comparision between sonodynamic effects with protoporphyrin IX and hematoporphyrin on the cytoskeleton of Ehrlich ascites carcinoma cells.
OBJECTIVE
Our previous work demonstrated that the enhancement of cytotoxicity by protoporphyrin IX (Pp) was significantly higher than hematoporphyrin (Hp), when they were compared at the same ultrasound-exposure conditions, since the cytoskeleton plays a crucial role in numerous cell functions and the effect of sonodynamic therapy (SDT) on cytoskeleton has not been reported yet. So, it is very important to investigate whether SDT has some influence on the cytoskeleton, and it would also be interesting to compare Pp-/ and Hp-mediated SDT on the cytoskeleton.


METHODS
Ehrlich ascites carcinoma (EAC) cells were exposed to ultrasound for up to 15 seconds (1.34 MHz, 1 w/cm(2)) in the presence of 20 microM of Pp or 20 microM of Hp. Cell viability was determined by the trypan blue exclusion test. Morphologic changes were observed under a scanning electron microscope. Cytoskeleton damages were shown by immunofluorescence staining of microtubules, actin microfilaments, and intermediate filaments of vimentin.


RESULTS
Our experiment showed that the extent of cytoskeleton damage in EAC cells increased as time was prolonged, and also which was more significant in the Pp-SDT group than that in the Hp-SDT group at the same time after exposure.


CONCLUSIONS
Results implied that the ultrastructural changes might account for cell destruction and the cytoskeletal components were involved in the cell-damaging process induced SDT treatment.
Wang
Pan
P
College of Life Sciences, Shaanxi Normal University, Xi'an, China.
Wang
Xiaobing
X
Liu
Quanhong
Q
Zhao
Xia
X
Cao
Bing
B
Zhao
Ping
P
D000199:Actins / Q000378:metabolism; D000818:Animals; D002286:Carcinoma, Ehrlich Tumor / Q000378:metabolism / Q000473:pathology / Q000628:therapy*; D016923:Cell Death / Q000187:drug effects; D045744:Cell Line, Tumor; D003599:Cytoskeleton / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D019084:Fluorescent Antibody Technique, Indirect; D006415:Hematoporphyrins / Q000737:chemistry / Q000494:pharmacology*; D006801:Humans; D051379:Mice; D008813:Mice, Inbred ICR; D017319:Photosensitizing Agents / Q000737:chemistry / Q000494:pharmacology*; D011524:Protoporphyrins / Q000737:chemistry / Q000494:pharmacology*; D011817:Rabbits; D014464:Ultrasonic Therapy / Q000379:methods*; D014746:Vimentin / Q000378:metabolism
D000199:Actins; D006415:Hematoporphyrins; D017319:Photosensitizing Agents; D011524:Protoporphyrins; D014746:Vimentin; C028025:protoporphyrin IX