RRC ID 43084
Author Kusumoto K, Kageyama K, Matsuda T, Tomura TT, Munakata H, Tanaka H, Yazama F, Miwa N.
Title Effects of ethyl-esterization, chain-lengths, unsaturation degrees, and hyperthermia on carcinostatic effect of omega-hydroxylated fatty acids.
Journal Exp Oncol
Abstract AIM:To evaluate promotive effect of hyperthermia on the carcinostatic activity of synthesized omega-hydroxy fatty acids (omega HFAs) and their ethylesters agaist Ehrlich ascites tumor (EAT) cells.
METHODS:EAT cells were cultured with either omegaHFAs or their ethylester derivatives in a water bath at either 37 degrees C or 42 degrees C for 30 min, followed by incubation in a CO2 incubator for 20 or 72 h. Mitochond-rial dehydrogenase-based WST-1 assay and trypan blue dye exclusion assay were then conducted after incubation. Morphological changes were observed by scanning electron microscopy (SEM).
RESULTS:Omega-HFA having a saturated 16-carbon straight-chain (omega H16:0) was the most carcinostatic (at 37 degrees C - viability level: 60.0%; at 42 degrees C - 49.6% (WST-1)) among saturated and unsaturated omegaHFAs with 12, 15 or 16 carbon atoms, when administrated to EAT cells at 100 microM for 20 h. Carcinostatic activity was markedly enhanced by ethyl-esterization of saturated fatty acids, such as omegaH16:0 (at 37 degrees C - 42.3%; at 42 degrees C - 11.2%, ibid) and omegaH15:0 (at 37 degrees C - 74.6%; at 42 degrees C - 25.3%, ibid), and their unsaturated counterparts were extremely effective only in combination with hyperthermia. Prolongation of the incubation period to 72 h at the same concentration increased appreciably their carcinostatic effect (omega H16:0 ethylesther: 1.3%; omegaH15:0 ethylesther: 8.0%). These values were also supported by dye exclusion assay. The carcinostatic activity enhanced more markedly by hyperthermia (1.2%; 2.1%, ibid). SEM shows that omegaH16:0 ethylester-exposed EAT cells underwent extensive injury, such as deformation of cell structure or disappearance of microvilli.
CONCLUSIONS:omega H16:0 ethylester possesses high carcinostatic activity in vitro in combination with hyperthermia and may be utilized as potent anticancer therapeutic agent.
Volume 29(2)
Pages 106-10
Published 2007-6-1
PII 31/611
PMID 17704741
MeSH Animals Antineoplastic Agents / chemistry Antineoplastic Agents / metabolism* Antineoplastic Agents / therapeutic use* Carcinoma, Ehrlich Tumor / drug therapy* Carcinoma, Ehrlich Tumor / metabolism Carcinoma, Ehrlich Tumor / ultrastructure Cell Culture Techniques Cell Survival / drug effects Esterification Fatty Acids / chemistry Fatty Acids / metabolism* Fatty Acids / therapeutic use* Female Hot Temperature* Mice Mice, Inbred ICR Microvilli / drug effects Microvilli / ultrastructure Time Factors Tumor Cells, Cultured / metabolism
Human and Animal Cells Ehrlich(RCB0142)