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Abstract

¼­·Ð
¹ß±âºÎÀüÀÇ Ä¡·á¿¡ ÀÖ¾î prostagladin E1(PGE1)Àº Ź¿ùÇÑ È¿
°ú¿¡ ºñÇØ ÇÕº´ÁõÀÌ Àû¾î ¿©·¯ ÇØ µ¿¾È »ç¿ëµÇ¾î¿Ô´Ù. SherifµîÀº Á¤»óÀΰú ¿ø¼þÀÌÀÇ À½°æÇØ
¸éü³»¿¡ PGE1À» ÁÖ»çÇÑ °á°ú À½°æ¹ß±â°¡ ÀϾÀ¸³ª, PGE1¿¡
¹ÝÀÀÇÏÁö ¾Ê´Â ¹ß±âºÎÀüȯÀÚ¿Í °³¿¡¼­´Â ¹ß±â°¡ µÇÁö ¾Ê¾Ò´Ù°í º¸°íÇÏ¿´´Ù. ÀÌ´Â À½°æÇظé
ü¿¡¼­ ƯÀ̼ö¿ëü¿Í PGE1ÀÇ °áÇÕÀÌ ¹ß±â¸¦ À¯¹ßÇÏ´Â ÃÖÃÊÀÇ °úÁ¤À¸·Î, Àΰ£
°ú ¿ø¼þÀÌÀÇ À½°æÇظéü Á¶Á÷³»¿¡´Â PGE1¿¡ ƯÀÌÇÑ ¼ö¿ëü°¡ Á¸ÀçÇÏ°í °³¿¡
¼­´Â Çظéü Á¶Á÷³»¿¡ ¼ö¿ëü°¡ Á¸ÀçÇÏÁö ¾ÊÀ¸¸ç ½ÉÇÑ ¹ß±âºÎÀüÀÌ ÀÖ´Â °æ¿ì´Â ¼ö¿ëüÀÇ ¹Ð
µµ¿Í °áÇÕ·ÂÀÌ °¨¼ÒÇϱ⠶§¹®À̶ó°í ÇÏ¿´´Ù. ±×·¯³ª ¹ß±âºÎÀüȯÀÚ¿¡¼­ PGE1
ÀÇ Æ¯ÀÌ ¼ö¿ëü°¡ °¨¼ÒÇÏ´Â ÀÌÀ¯´Â ºÒºÐ¸íÇϸç PGE1ÀÌ¿ÜÀÇ ÇÁ·Î½ºÅ¸±Û¶õµò
°è¿­ÀÇ ¿©·¯ ¾àÁ¦µé(prostanoids)ÀÇ À½°æÇظéü¿¡ ´ëÇÑ ÀÛ¿ëÀ̳ª ±âÀü¿¡ ´ëÇؼ­´Â ¹àÇôÁø °Í
ÀÌ °ÅÀÇ ¾ø´Ù. ÀϹÝÀûÀ¸·Î ¾à¹°¹ÝÀÀ¿¡ ´ëÇÑ ½ÇÇè¿¡¼­ °¡Àå ÀÌ»óÀûÀÎ ½ÇÇè´ë»óÀº ÀÎüÀÌÁö¸¸,
ÀÎü½ÇÇèÀÇ Àü ´Ü°è·Î »ç¿ëÇÏ°í ÀÖ´Â µ¿¹°½ÇÇè¿¡¼­´Â ´ë»óµ¿¹°ÀÇ ½ÇÇè¾àÁ¦¿¡ ´ëÇÑ ¹ÝÀÀÀÌ
ÀÎü¿Í °°¾Æ¾ß ÇÑ´Ù. À̸¦ À§Çؼ­´Â ±× µ¿¹°ÀÇ ¾à¹°¿¡ ´ëÇÑ ¼ö¿ëü³ª ÀÛ¿ë±âÀüÀÌ Àΰ£°ú À¯
»çÇÏ¿©¾ß ÇÏ¸ç »ýü½ÇÇèÀÏ °æ¿ì´Â °³Ã¼ÀÇ Å©±â°¡ ÃæºÐÇØ¾ß °¡´ÉÇÏ´Ù. °í¾çÀÌ´Â ¿µÀå·ù³ª °³
º¸´Ù °³Ã¼ÀÇ Å©±â´Â ÀÛÀ¸³ª °¡°ÝÀÌ ½Î°í, °¢Á¾ ¾àÁ¦¿¡ ´ëÇÑ »ýü½ÇÇè ½Ã »ý¸í·ÂÀÌ °­Çϸç
Á㳪 Åä³¢º¸´Ù ¹ÝÀÀÀÇ ÀçÇö¼ºÀÌ ³ô¾Æ °á°úÀÇ ½Å·Úµµ°¡ ³ô´Ù´Â ÀåÁ¡ÀÌ ÀÖ¾î, º» ±³½Ç¿¡¼­´Â
2-3³â ÀüºÎÅÍ °í¾çÀ̸¦ ´ë»óÀ¸·Î °¢Á¾ »ýü½ÇÇèÀ» ÁøÇàÇÏ¿© ¿Ô´Ù. ÀÌ¿¡ ÀúÀÚµéÀº »ýü°í¾ç
ÀÌ¿¡¼­ Á¤»ó »ê¼Ò¾Ð ¹× ÇãÇ÷¼º À½°æ Áö¼Ó ¹ß±âÁõ°ú °°Àº Àú»ê¼ÒÁõÇÏ¿¡¼­ÀÇ prostanoids¿¡
´ëÇÑ À½°æ¹ß±â¹ÝÀÀÀ» ¾Ë¾Æº¸°í, ±× °á°ú¿¡ µû¶ó ÇâÈÄ prostanoids¿¡ °üÇÑ ÀÏ·ÃÀÇ ½ÇÇèµéÀ»
°í¾çÀ̸¦ »ç¿ëÇÒ ¶§ Àΰ£°ú À¯»çÇÑ ÀÛ¿ë±âÀüÀÌ ÀÖ´ÂÁö¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù
#ÃÊ·Ï#
Purpose : The widespread use of intracorporeal prostaglandin E1 (PGE
1) injection for the treatment of erectile dysfunction has focused interest
on the physiological functions of prostanoids with the mechanism of action. We
investigated in vivo feline penile erectile and contractile responses to prostanoids.
Materials and Methods : Under the general anesthesia, 26 mature male cats were
conditioned normoxia and hypoventilated hypoxia with ventilator in room air(PH: 7.14¡¾
0.47, PO2: 25.52¡¾5.89mmHg, PCO2: 74.27¡¾10.86mmHg). Vasoactive
substances were infused via internal pudendal artery and the changes of intracavernous
pressure to vasoactive substances were monitored with physiograph under normoxia and
hypoxia with acidosis.
Results : Under normoxia, PGE1 induced dose-dependent cavernous
relaxation and PGE1 was more potent than papaverine but less than
acetylcholine. PGE1- induced cavernous relaxation was blocked by the
K+-channel blockers, tetraethylammonium(TEA) and 4-aminopyridine, in
dose-dependent manner but was completely reversed by the K+-channel
opener, pinacidil. Calcium ionophore, ionomycin(10-3M/0.2ml) prevented the
cavernous relaxation by PGE1 under hypoxia(n=6, p<0.01).
PGI2 showed minimal cavernous relaxation with tumescence.
Thromboxane A2(TXA2) attenuated the acetylcholine-induced
relaxation
Conclusions : This study showed that PGE2 relax feline cavernous
smooth muscle. But the mechanism of PGE2 on feline cavernosum should
be elucidated by the receptor binding study. These results suggest that
PGE2 induced smooth muscle relaxation by the opening of
Maxi-K+ (Kca) channel and subsequent hyperpolarization. It
would be followed by a reduced opening of voltage-dependent
Ca2+-channel and subsequent decrease of intracellular
Ca2+concentration.
(Korean J Urol 1998; 39: 513¡­8)

Å°¿öµå

Prostanoids; Penile erection; Cat;

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