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ÀÎü °íȯÁ¶Á÷¿¡¼­ Steroidogenic Acute Regulatory(StAR)proteinÀÇ °ËÃâ Detection of the Steroidogenic Acute Regulatory(StAR) Protein in Human Testicular Tissue

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·ù¼ö¹æ/Soo Bang Ryu Á¤µ¿¿ø/¿ÀºÀ·Ä/±è¼ºÁø/¼ÒÀç¸ñ/Dong Won Jeong/Bong Ryoul Oh/Seong Jin Kim/Jae Mog Soh

Abstract

¼­·Ð
ºÎ½Å°ú ¼º¼±ÀÇ steroid hormone »ý¼º¿¡ À־ cholesterolÀÌ tropic hormoneÀÇ Àڱؿ¡ ÀÇ
ÇØ PregnenoloneÀ¸·Î ÀüȯµÇ´Âµ¥, À̶§ cytochrome P45O cholesterol sidechain cleavage
(CSCC)È¿¼Ò¿¡ ÀÇÇØ Ã˸ŵȴÙ. ¼¼Æ÷Áú ¾È¿¡ ÀÖ´Â cholesterolÀº mitochondrial inner
membrane ³»·Î µé¾î°¡¼­ CSCCÈ¿¼Ò¿¡ ¹ÝÀÀÇÏ¿©¾ß Çϴµ¥ cholesterolÀº ¹è¼ö¼º ¼ºÁúÀÌ ÀÖ
¾î mitochondrial membraneÀ» Åë°úÇÏÁö ¸øÇϹǷΠcholesterol user mitochondrial membrane
³»·Î À̼۵Ǵ °ÍÀÌ ÀÌ·¯ÇÑ »ýÈ­ÇÐÀû °úÁ¤¿¡ ÀÖ¾î ¸Å¿ì Áß¿äÇÑ ¹®Á¦¿´´Ù.
Áö³­ ¼ö½Ê³â°£ cholesterolÀÌ ¾î¶»°Ô mitochondrial membrane³»·Î À̼۵Ǵ°¡¿¡ ´ëÇÑ ¿¬
±¸°¡ ÁøÇàµÇ¾î ¿Ô´Âµ¥, ÃÖ±Ù¿¡ steroidogenic acute regulatory protein(StAR protein)ÀÌ ¹ß
°ßµÇ¾ú°í ÀÌ »õ·Î¿î ¹°ÁúÀÌ steroid hormone »ý¼º°úÁ¤ÀÇ Ã¹ ´Ü°èÀÎ cholesterol À̼ۿ¡ °ü¿©
ÇÏ°í ÀÌ ´Ü°è°¡ steroid hormone ÇÕ¼º¿¡ rate-limiting stepÀ¸·Î ¾Ë·ÁÁö°í ÀÖ´Ù.
ÃÖ±Ù¿¡ Sugawara µî¿¡ ÀÇÇØ ÀÎüÀÇ ºÎ½Å, ¼º¼±, ½Å¿¡¼­ StAR cDNA sequence°¡ mouse
sequence¿Í ºñ½ÁÇÏ´Ù°í º¸°íµÇ¾úÀ¸³ª ±¹³»¿¡¼­ º¸°í°¡ ¾ø´Ù. ÀÌ¿¡ º» ±³½Ç¿¡¼­´Â ÀÎüÀÇ °í
ȯÁ¶Á÷¿¡¼­ StAR proteinÀÇ °ËÃâ¿©ºÎ¸¦ northern blotting hybridization°ú reverse
transcri-ptase polymerase chain rcaction(RT-PCR)À» ÀÌ¿ëÇØ StAR mRNA¸¦ °ËÃâÇÏ°í, ¸é
¿ªÁ¶Á÷È­Çп°»öÀ» ÅëÇØ StAR protein)À» °ËÃâÇÏ¿© StARÀÇ Á¸ÀçÀ¯¹«¸¦ ±Ô¸íÇÏ°íÀÚ ½ÇÇèÀ»
½ÃÇàÇÏ¿´´Ù. º» ½ÇÇè¿¡¼­ ÀÎüÀÇ È¯³» SORÀÇ Á¸À縦 ±Ô¸íÇÔÀ¸·Î½á ÇâÈÄ Àü½Å ÀüÀÌµÈ Àü¸³
¼±¾Ï ȯÀÚ¿¡¼­StAR antagonist¸¦ °íȯ³»¿¡¸¸ ±¹¼ÒÀûÀ¸·Î óġ ÇÏ¿© ´Ù¸¥ ºÎÀ§ÀÇ steroid
hormone¿¡ ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê°í testosterone¸¸ ¼±ÅÃÀûÀ¸·Î Â÷´ÜÇÒ ¼ö ÀÖ´Â ¹æ¹ýÀ» ¿¬±¸ÇÏ°í
steroidogenesis¿¡ Áß¿äÇÑ ¿ªÇÒÀ» ÇÏ´Â ÀÌ »õ·Î¿î ´Ü¹éÁú¿¡ ´ëÇÑ ¿¬±¸ÀÇ ¹Ø°Å¸§ÀÌ µÇ°íÀÚ ÇÏ
¿´´Ù.
#ÃÊ·Ï#
Purpose : A crucial event in the acute regulation of steroidogenesis by tropic hormone
is the delivery of cholesterol from cytosol into the mitochondrial inner membrane where
it is converted to pregnenolone by the cytochrome P45O cholesterol side chain cleavage
enzyme. Recently, it has been observed that the acute production of steroid hormone
depends on a rapidly synthesized, cycloheximide sensitive and highly labile protein that
appeared in response to tropic hormone. This protein was named as Steroidogenic Acute
Regulatory(StAR) protein. The purpose of this experiment was to detect the StAR
protein in human testicular tissue.
Materials and Methods : Human testicular tissues were obtained during the surgery in
patients with cryptorchidism, infertility, and prostate cancer Northern blotting
hyridization and RT-PCR were performed to detect the StAR mRNA in human testicular
tissues. In addition, immunohistochemical staining was performed to test the presence of
the StAR protein in human testicular tissues.
Results : The StAR mRNA was detected as a weak band in prostate cancer and
infertility patients, but not detected in cryptorchidism patients by Northern blotting
hybridization. In RT-PCR of human testicular tissues for StAR mRNA, RT-PCR
products(about 2000p) were shown to have in cryptorchidism, infertility, and prostate
cancer patients. In immunohistochemical staining of human StAR protein,
immunoreactivity of human StAR protein was positive in the interstitial tissues of
human testis.
Conclusions : The StAR protein that plays a key role in the steroidogenesis was
detected in human testicular tissues and this protein will be effective in pathogenesis
and treatment of the diseases that are associated with steroid hormones. (Korean J
Urol 1998; 39: 793¡­7)

Å°¿öµå

Steroidogenic acute regulatory protein; Human testis;

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