Tetrahydroisoquinoline Alkaloids°¡ ÁãÀÇ µ¿¸Æ°ú ³ú±ÕµîÁúÀÇ ¥á-Adrenoceptors¿¡ ¹ÌÄ¡´Â ¿µÇâ
Effect of Tetrahydroisoquinoline Alkaloids on the ¥á-adrenoceptors in Rat Aorta and Brain Homogenates
¼Ò¼Ó »ó¼¼Á¤º¸
ÀÌÇö¼®/Hyun Seok Lee
¹é¼±ÇÏ/Ȳ¼öÇö/¹ÚÀμº/±èÀº»ó/Á¤Áø¸í/ÇÑÁ¾¿ì/Àå±âö/Àå±âö/Sun Ha Paek/Soo Hyun Hwang/In Sung Park/Eun Sang Kim/Jin Myung Jung/Jong Woo Han/Ki Churl Chang/Ki Churl Chang
KMID : 0359819990280010005
Abstract
Tetrahydroisoquinoline(THI) ¾ËÄ«·ÎÀ̵å ÈÇÕ¹°µéÀº °£´ÜÇÑ phenylethyamine ÈÇÕ¹°µéÀÇ
È£³ªÇü À¯µµÃ¼·Î »ý°¢ÇÒ ¼ö ÀÖ°í »ó´ç¼öÀÇ ÈÇÕ¹°µéÀÌ Åº¼Ò 6°ú 7¹ø À§Ä¡ÀÇ °ç°¡Áö ġȯ¸¸
À¸·Î catecholamines¿¡ ´ëÇÑ »ó´çÈ÷ ³ôÀº ģȷÂÀ» º¸ÀÌ°í ÀÖ´Ù. º» ¿¬±¸¿¡¼´Â ¸î °¡Áö
THI°è¿ÀÇ ÈÇÕ¹°À» ÇÕ¼ºÇÏ°í ÈòÁãÀÇ ½É¹æ°ú ÈäºÎ ´ëµ¿¸ÆÀ» ÀûÃâÇÏ¿© ±× ¾à¸®ÇÐÀû ÀÛ¿ëÀ»
Á¶»çÇÏ¿´´Ù. ¶ÇÇÑ À̵é ÈÇÕ¹°ÀÇ ¥á1-¾Æµå·¹³¯¸° ¼ö¿ëü ģȷÂÀ» Á¶»çÇϱâ
À§ÇØ ÈòÁã ´ë³ú¸¦ ±ÕÁúÈÇÏ¿© [3H] prazosin ġȯ°áÇÕ½ÇÇèÀ» ÇÏ¿´´Ù.
ÀûÃâÇÑ ÈòÁ㠽ɹ濡¼ ½ÃÇèÇÑ ¸ðµç THI°è ÈÇÕ¹°°ú dobutamineÀº ½É¹Ú¼ö¿Í ½É±Ù·ÂÀ» Áõ
°¡½ÃÄ×´Ù. Propranol Á¸ÀçÇÏ¿¡¼´Â YS-49¿Í YS-51 ÈÇÕÀº ³óµµ-ÀÇÁ¸Àû ¹ÝÀÀ°î¼±Àº ¿À¸¥ÂÊ
À¸·Î À̵¿ÇÏ¿´°í pA2°ªÀÌ °¢°¢ 8.07¡¾0.84¿Í 7.93¡¾0.11À̾ú´Ù. °¢ ÈÇÕ¹°ÀÇ
±â¿ï±â´Â Å©°Ô ´Ù¸£Áö ¾Ê¾Æ À̵é ÈÇÕ¹°µéÀº ½ÉÀåÀÇ ¥â1-¾Æµå·¹³¯¸° ¼ö¿ëü
¿¡ ¸Å¿ì °æÀïÀûÀ¸·Î ÀÛ¿ëÇÔÀ» ¾Ë ¼ö°¡ ÀÖ¾ú´Ù. ÈòÁã ´ë³úÀÇ ¥á1-¾Æµå·¹³¯¸°
¼ö¿ëü¿¡ ´ëÇÑ YS-49, YS-51 ±×¸®°í higenamineÀÇ Ki°ªÀº °¢°¢ 2.75, 2.81 ±×¸®°í 1.02À̾ú
´Ù.
À̻󿡼 THI ¾ËÄ«·ÎÀ̵å ÈÇÕ¹°µéÀº ÈòÁ㠽ɹæ°ú ´ëµ¿¸ÆÀÇ ¥á1-¾Æµå·¹³¯
¸° ¼ö¿ëü¿¡ »ó´çÇÑ Ä£È·ÂÀ» °¡Áö´Â ÇÑÆí ½ÉÀåÀÇ ¥â1-¾Æµå·¹³¯¸° ¼ö¿ëü¿¡
µµ ´Ù¼Ò ³ôÀº ģȷÂÀ» º¸¿´´Ù. ÀÌ¿¡ ÀúÀÚµéÀº ³ú µ¿¸Æ·ù¼º ÁöÁÖ¸·ÇÏ ÃâÇ÷½Ã, Ç÷°ü ¿¬ÃàÀ»
Ä¡·áÇϱâ À§ÇÑ À̵é ÈÇÕ¹°µéÀÇ À¯¿ë¼ºÀ» ¾Ë¾Æº¸´Â °ÍÀº °¡Ä¡°¡ ÀÖ´Ù°í º»´Ù.
#ÃÊ·Ï#
Tetrahydroisoquinoline(THI) alkaloids can be considered as cyclized derivatives of
simple phenylethylamines and many of them. especially with 6,7-disubstitution,
demonstrate relatively high affinity for catecholamines. In the present study,
pharmacological action of limited series THI has been examined using rat isolated atria
and aorta. [3H] prazosin displacement binding study with THI compounds
using rat brain homogenates was performed to find out if these probes to have ¥á
1-adrenoceptor affinity.
In isolated rat atria, all THIs and dobutamine increased heart rate and contractile
force. In the presence of propranolol, the concentration response curves of YS 49 and
YS 51 shifted to the right resulting in 8.07¡¾0.84 and 7.93¡¾0.11 of pA2
values, respectively. The slope of each compound was not deviated from unity,
indicating that these chemicals are highly competitive at the cardiac ¥â
1-adrenoceptors. YS 49, YS 51 and higenamine showed ¥á
1-adrenoceptor affinity in rat brain in which the dissociation constant(Ki)
was 2.75, 2.81 and 1.02¥ìM, respectively.
It is concluded, therefore, that THI alkaloids have considerable affinity to ¥á
1-adrenoceptors in rat aorta and atria, while these probes show relatively
high affinity for cardiac ¥â1-adrenoceptors. The authors speculate that it is
worthy investigating whether these chemicals are useful in the management of
vasospasm of aneurysmal subarachnoid hemorrhage.
Tetrahydroisoquinoline; Inotropic action; Vasodilatation; Rat; Adrenoceptor; Vasospasm; Subarachnoid hemorrhage;
Å°¿öµå
¿ø¹® ¹× ¸µÅ©¾Æ¿ô Á¤º¸
µîÀçÀú³Î Á¤º¸