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Testosterone°ú Calcitonin Gene-related Peptide¿¡ ´ëÇÑ ÈòÁã °íȯµµ´ëÀÇ ¼öÃà ¹ÝÀÀ Gubernacular Contractile Response to Testosterone and Calcitonin Gene-related Peptide in Rat

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Abstract

¼­·Ð
1985³â HudsonÀº °íȯ ÇÏ°­ÀÇ ±âÀüÀ» º¹ºÎÀ̵¿±â (transabdominal phase)¿Í À½³¶¼­ÇýºÎ
À̵¿±â (scrotoinguinal phase)·Î ³ª´©¾ú´Ù. º¹ºÎÀ̵¿±â´Â mullerian inhibiting substance¿¡
ÀÇÇØ Á¶ÀýµÇ¸ç, °íȯÀÌ ¼­ÇýºÎ¿¡¼­ À½³¶À¸·Î À̵¿ÇÏ´Â À½³¶¼­ÇýºÎÀ̵¿±â´Â º¹ºÎÀ̵¿±â¿Í´Â
´Þ¸® Ç׾ȵå·ÎÁ¨ÀÎ flutamide¸¦ Åõ¿©ÇÑ Áã¿¡¼­ °íȯ ÇÏ°­ÀÇ Àå¾Ö°¡ ÃÊ·¡µÇ°í °íȯµµ´ëÀÇ ¿Ü
Ãþ¿¡ ÀÖ´Â °Å°í±Ù¿¡ ¾Èµå·ÎÁ¨ ¼ö¿ëü°¡ Á¸ÀçÇÏ´Â °ÍÀÌ ¹àÇôÁ® ¾Èµå·ÎÁ¨ ÀÇÁ¸¼ºÀÓÀÌ Áõ¸íµÇ
¾ú´Ù. ¶ÇÇÑ À½ºÎ´ëÅð½Å°æ(genitofemoral nerve)À» Àý´ÜÇÑ µ¿¹°½ÇÇè¿¡¼­ °íȯ ÇÏ°­ÀÇ Àå¾Ö°¡
ÃÊ·¡µÇ´Âµ¥ ÀÌ´Â À½ºÎ´ëÅð½Å°æ¿¡ Á¸ÀçÇÏ¿© °íȯµµ´ëÀÇ calcitonin gene-belated
peptide(CGRP) ¼ö¿ëü ¿¡ ÀÛ¿ëÇÔÀ¸·Î½á Á¤¼Ò°Å±ÙÀ» ¼öÃà½ÃÅ°´Â ½Å°æÀü´Þ¹°ÁúÀÎ CGRPÀÇ ºÐ
ºñ°¡ ¾ïÁ¦µÇ±â ¶§¹®ÀÌ´Ù. °ú°Å °íȯ ÇÏ°­ÀÇ ±âÀü¿¡ ³²¼ºÈ£¸£¸óÀÇ ¿ªÇÒ¿¡ ´ëÇÑ ¸¹Àº ¿¬±¸°¡
ÀÖ¾úÀ¸¸ç ¼º¼±ÀÚ±ØÈ£¸£¸óÀ̳ª ³²¼ºÈ£¸£¸óÀÇ ºÎÁ·Àº Á¤·ù°íȯÀ» ÀÏÀ¸Å°°í ÀÓ»ó¿¡¼­ È£¸£¸óÀ»
Åõ¿©ÇÔÀ¸·Î½á ¸¹Àº ¿¹¿¡¼­ °íȯ ÇÏ°­ÀÌ ÀÌ·ç¾îÁ®, ¾Èµå·ÎÁ¨ÀÇ ºÎÁ·ÀÌ Á¤·ù°íȯÀÇ ÇÑ °¡Áö
¿øÀÎÀ¸·Î µÇ¾îÀÖ´Ù. ±×·¯³ª ÃÖ±Ù±îÁöµµ °íȯ ÇÏ°­ÀÇ ±âÀü¿¡ ¾Èµå·ÎÁ¨ÀÌ ¾î¶² ÀÛ¿ëÀ» Çϴ°¡
¿¡ ´ëÇÏ¿© ¿ÏÀüÈ÷ ¹àÇôÁöÁö ¾Ê¾ÒÀ¸¸ç ´ÜÁö ½Å°æÀü´Þ¹°ÁúÀÎ CGRPÀÇ ºÐºñ Àå¾Ö¸¦ ÀÏÀ¸ÄÑ °í
ȯ ÇÏ°­¿¡ °£Á¢ÀûÀ¸·Î ¿µÇâÀ» ÁÖ´Â °ÍÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. ¶ÇÇÑ Á¤¼Ò°Å±Ù¿¡ Á¸ÀçÇÏ´Â ¾Èµå·Î
Á¨ ¼ö¿ëü´Â Ãâ»ý ÀÌÈÄ ±× ¼ýÀÚ°¡ Á¡Â÷ °¨¼ÒÇÑ´Ù°í ÇÏ¿´´Ù. ÀÌ¿Í °°ÀÌ Á¤¼Ò°Å±Ù¿¡ ¾Èµå·ÎÁ¨
¼ö¿ëü°¡ Á¸ÀçÇÑ´Ù´Â °ÍÀº ¾Èµå·ÎÁ¨ÀÌ CGRP¿Í ¸¶Âù°¡Áö·Î °íȯµµ´ë¸¦ ¼öÃà½ÃÅ°´Â ½Å°æÀü
´Þ¹°ÁúÀÇ ÇϳªÀÓÀ» ¾Ï½ÃÇÏ¸ç µû¶ó¼­ ¾Èµå·ÎÁ¨ÀÌ °íȯ ÇÏ°­ÀÇ ±âÀü¿¡ Á÷Á¢ÀûÀÎ ¿µÇâÀ» ¹ÌÄ¥
¼ö ÀÖ´Ù°í »ý°¢µÈ´Ù. ÀÌ¿¡ ÀúÀÚµéÀº ¾Èµå·ÎÁ¨°ú CGRP°¡ °íȯµµ´ëÀÇ ¼öÃà ¹ÝÀÀ¿¡ ¹ÌÄ¡´Â ¿µ
ÇâÀ» »ýü¿Ü¿¡¼­ °íȯµµ´ëÀÇ ¼öÃàÀ» È®ÀÎÇÒ ¼ö ÀÖ´Â °¡½ÃÀûÀÎ ½ÇÇè ¹æ¹ýÀÇ ÇϳªÀÎ
Polygraph¸¦ ÀÌ¿ëÇÏ¿© ¹àÇô º¸°íÀÚ ÇÏ¿´´Ù.

Purpose: It was known that the gubernaculum contract by release of calcitonin
gene-related peptide(CGRP) and androgens may control gubernacular migration indirectly
via release of CGRP from the genitofemoral none in the ingulnoscrotal region. To
determine the direct effect of testosterone to the testicular descent and usefulness of
polygraph for detecting the contractility of the gubernaculum, current study was
designed.
Materials and Methods: Twenty four Sprague-Dawley male rats were used in this
experiment a%or 3, 5, 7days and 2weeks of birth. Gubernaculums were mounted in
organ baths and bathed in oxygenated Tyrode's solution under 200§· of isotonic tension.
The contractile response in vitro of testosterone (4.8¡¿10-3M) and
CGRP(10-7M) were monitored via an FT.03 force transducer and recorded
on a Grass 7D polygraph. The recorded tension was expressed as §· tension per 10§· of
gubernacular tissue.
Results: Both exogenous testosterone and CGRP increased isotonic tension and the
degree of gubernacular contractility declined significantly with age (p<0.05). Testosterone
and CGRP increased minimal spontaneous contraction of the gubernaculum.
Conclusions: These results suggest that testosterone may directly act as one of the
neurotransmitters for the contraction of the gubernaculum as well as CGRP and
measuring the contractility using polygraph is a useful method for the study of
testicular descent.

Å°¿öµå

Gubernaculum; Cryptorchidism; Testosterone; Calcitonin gene-related peptide;

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