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The Effect of Hyperthermia on p-Glycoprotein Expression, Glutathione Content and Glutathione-related Enzyme Activities in Human Renal Cell Carcinoma Cells
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KMID : 0358319990400020168
Abstract
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ÀúÀÚµéÀº ÀÎü ½Å¼¼Æ÷¾ÏÀÇ Ä¡·á¿¡ ÀÖ¾î È¿°úÀûÀÎ °ÍÀ¸·Î ¾Ë·ÁÁø ¿Â¿¿ä¹ý°ú Ç×¾ÏÁ¦ÀÇ º´
¿ë ½Ã¿¡ ±× »ó½Â±âÀüÀ» ¾Ë¾Æº¸±â À§ÇØ ¸î °¡Áö ¾àÁ¦³»¼º ¹°ÁúÀÌ ¿Â¿¿ä¹ý¿¡ ÀÇÇÏ¿© ¾î¶»°Ô
º¯ÈµÇ´Â°¡¸¦ Á¶»çÇÏ¿´´Ù. ÀÎü ½Å¼¼Æ÷¾Ï¼¼Æ÷ÁÖÀÎ Caki-1°ú A-498¼¼Æ÷¿¡ 43¡ÉÀÇ ¿Â¿¿ä¹ý
À» °¡ÇÒ ¶§ glutathione ÇÔ·®°ú glutathione peroxidase, glutathione transferaseÀÇ È°¼ºµµ´Â
°¢°¢ÀÇ 37¡É ´ëÁ¶±º°ú ºñ±³ÇÏ¿© À¯ÀÇÇÑ º¯È°¡ ¾ø¾ú´Ù. µû¶ó¼ ¿Â¿¿ä¹ý°ú Ç×¾ÏÁ¦ÀÇ »ó½Â±â
Àü¿¡´Â glutathioneÀÇ Çص¶ÀÛ¿ëÀÌ °ü¿©ÇÏÁö ¾Ê´Â´Ù°í ÃßÁ¤µÈ´Ù. ¹Ý¸é¿¡ 43¡É 4½Ã°£ÀÇ ¿Â¿¿ä
¹ý¿¡ ÀÇÇØ p´ç´Ü¹éÀÇ Ç¥ÇöÀº °¢°¢ÀÇ ¼¼Æ÷ÁÖ¿¡¼ ´ëÁ¶±ºÀ» 1·Î Á¤ÇÒ ¶§ Caki-1 ¼¼Æ÷ÁÖ¿¡¼
0.3À¸·Î A-498 ¼¼Æ÷ÁÖ¿¡¼´Â 0.2·Î °¢°¢ °¨¼ÒµÇ¾ú´Ù. p´ç´Ü¹é Ç¥ÇöÀÇ °¨¼Ò´Â ¾à¹° ¹èÃâ±âÀü
ÀÇ Àå¾Ö¸¦ À¯¹ßÇØ Ç×¾ÏÁ¦ÀÇ ¼¼Æ÷³» ÃàÀû³óµµ¸¦ Áõ°¡½ÃÅ°°í, Áõ°¡µÈ ³óµµÀÇ Ç×¾ÏÁ¦´Â ¾Ï¼¼Æ÷
¿¡ ´õ ³ôÀº ¼¼Æ÷µ¶¼ºÀ» ÁÙ ¼ö ÀÖ´Ù°í »ý°¢µÈ´Ù.
Purpose : Resistance to anticancer chemotherapeutic drug remains a major obstacle in
cancer chemotherapy. Multidrug-resistance(MDR) gene overexpression and detoxification
by glutathione are believed to be involved in adriamycin and cisplatin resistance. We
investigated change of p-glycoprotein(MDR gene product) expression, cellular glutathione
content and glutathione peroxidase and glutathione transferase activities by hyperthermia
to elucidate the synergistic mechanism of hyperthermia with chemotherapeutic agent.
Materials and Methods : Human renal cell carcinoma cell lines, Caki-1 and A-498
were used. Control temperature was 37¡É and hyperthermia of 43¡É was applied in 2
and 4 hours durations. P-glycoprotein expression was measured by flowcytometric
examination using monoclonal antibody to p-glycoprotein. Glutathione content and
activities of glutathione peroxidase and transferase were measured by biochemical
methods.
Results : Glutathione content and activities of glutathione peroxidase and transferase
were not changed by hyperthermia. However, p-glycoprotein expression was reduced by
hyperthermia of 43¡É.
Conclusions : These results suggest that reduced p-glycoprotein expression by
hyperthermia causes increased intracellular accumulation of chemotherapeutic agent by
decreasing drug efflux mechanism and plays an important role in synergistic effect with
adriamycin and cisplatin cytotoxicities.
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Renal cell carcinoma; Hyperthermia; Chemotherapeutic agent; p-Glycoprotein;
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