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ÈòÁã¿¡¼­ 6-Hydroxydopamine¿¡ ÀÇÇÑ ±³°¨½Å°æ Â÷´Ü¼úÀÌ Á¤°üÀÇ ¼öÃà¿¡ ¹ÌÄ¡´Â ¿µÇâ ¹× Å×½ºÅ佺Å×·Ð º´¿ëÅõ¿©ÀÇ È¿°ú The Effects of Sympathectomy by 6-Hydroxydopamine and Pretreatment of Testosterone on the Contractility of the Vas Deferens in Rats

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Abstract

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Àå ÀÚ±Ø ½Ã ¼öÃà¹ÝÀÀµµ ´Ù¸£°Ô ³ªÅ¸³­´Ù. Áï, ºÎ°íȯºÎ¿¡¼­´Â ATP¿¡ ÀÇÇÑ À§»ó¼º ¼öÃà
(phasic contraction)º¸´Ù noradrenalin¿¡ ÀÇ ÇÑ ±äÀ强 ¼öÃà(tonic contraction)ÀÌ °­ÇÏ°Ô ³ª
Ÿ³ª¸ç Àü¸³¼±ºÎ¿¡¼­´Â ÀÌ¿Í ¹Ý´ëÀÇ ¼öÃàÀ» º¸ÀδÙ. ¿äºÎ ±³°¨½Å°æ Â÷´Ü¼úÀº ¼ö¼úÀûÀÎ ¹æ¹ý
°ú Phenol, alcohol, 6-hydroxydopamine(6-HD)µîÀ» ÀÌ¿ëÇÑ È­ÇÐÀû ¹æ¹ýÀÌ Àִµ¥, »çÁöÀÇ
¸¸¼º µ¿¸ÆÁúȯÀÎ Æó»ö¼ºÇ÷Àü¸Æ°ü¿° (Buerger's disease ¶Ç´Â thromboangitis obliterans), Ç÷
°ü¼º °æ·ÃÁõÈıº(Raynaud's disease), Æó»ö¼º µ¿¸Æ°æÈ­(arteriosclerosis obliterans) µî°ú ¸»
ÃʽŰæÀÇ ºÎºÐÀû ¼Õ»ó ÈÄ ÀÛ¿­ÅëÀ¸·Î ÀÎÇÑ ÅëÁõÀÇ Ä¡·á¿Í ¸»ÃÊÇ÷°üÀÇ Ç÷·ù Áõ°¡¸¦ ¸ñÀûÀ¸·Î
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Å×½ºÅ佺Å×·ÐÀÌ Á¤°üÀÇ ¼öÃà·ÂÀ» À¯ÁöÇϴµ¥ ¾î¶² ±âÀüÀ¸·Î ÀÛ¿ëÇÏ´ÂÁö´Â ¾ÆÁ÷ È®½ÇÇÏÁö ¾Ê
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¾î¶°ÇÑ º¯È­¸¦ ÀÏÀ¸Å°±â ¶§¹®ÀÎÁö¸¦ ¾Ë¾Æº¸°íÀÚ ÈòÁã¿¡¼­ 6-HDÀ» Åõ¿©ÇÏ¿© È­ÇÐÀû ±³°¨½Å
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Àü óġ°¡ ÀÌ·¯ÇÑ º¯È­¿¡ ¾î¶°ÇÑ ¿µÇâÀ» ¹ÌÄ¡´ÂÁö¸¦ ¾Ë¾Æº¸°íÀÚ º» ½ÇÇèÀ» ½ÃµµÇÏ¿´´Ù.
#ÃÊ·Ï#
Purpose: The chemical sympathectomy is now widely performed procedure for
vascular diseases of extremities. But it has been reported that this procedure may
produce ejaculatory failure in men. We investigated the changes of the contractility of
the vas deferens after chemical sympathectomy by 6-hydroxydopamine, and whether
these changes can be recovered by the pretreatment of testosterone.
Materials and Methods: The rats were divided into 5 groups, which were 1) control 2)
6-hydroxydopamine 100mg group 3) 6-hydroxydopamine 100mg + testosterone100mg
group 4) 6-hydroxydopamine 200mg group 5) 6-hydroxydopamine 200mg + testosterone
100mg group. 6-hydroxydopamine was injected intraperitoneally in each group at day 1,
3, 5 and killed at day 6. Testosterone was Injected intraperitoneally 30 minutes prior to
6-hydroxydopamine injection at day 1 . The vas deferns was quickly dissected out and
the contractilities by electrical field stimulation, phenylephrine, acetylcholine and KCI
were compared with control group.
Results: In prostatic vas, the phasic contractions were reduced only in 6-hydroxy-
dopamine 200mg group and recovered incompletely by testosterone. Tonic contractions in
prostatic vats were reduced in 6-hydroxydopamine looms group and 6-hydroxydopamine
100mg+testosterone 100mg group at 4, 8, 16Hz field stimulation and there was no
significant difference between the two groups. The contractilies in 6-hydroxydopamine
200mg group and 6-hydroxydopamine 200mg+testosterone 100mg group were reduced at
all frequencies, and testosterone pretreatment group showed slightly recovered
contractility at 32, 64Hz, but less than those of control. In epididymal vas, the phasic
and tonic contractions were reduced in all groups compared to control except in
6-hydroxydopamine 100mg+testosterone looms group at 32, 64Hz. The effects of
6-hydroxydopamine on phenylephrine or acetylcholine induced contraction showed
supersensitivity, however, testosterone pretreatments had no effects on their
supersensitivity. In the response to KCI, there was no difference in all the experimental
groups.
Conclusions: It seems that chemical sympathectomy results in decreased contraction of
the vas deferens, which is the main cause of ejaculatory failure. Although there is some
protective effect by testosterone pretreatment, but it is thought that it is not so
sufficient to prevent ejaculatory failure. But we suggest that there are possibilities of
protective effect of testosterone by altering the dose and time of administration. (Korean
J Urol 1998; 39: 437¡­42)

Å°¿öµå

Chemical sympathectomy; Testosterone; Vas deferens; Contractility;

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