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Abstract

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ÆòÈ°±ÙÀ¸·Î ÀÌ·ç¾îÁø ¹æ±¤Àº ¿äÀÇ ÀúÀå°ú ¹èÃâÀÇ ±â´ÉÀ» °¡Áö°í ÀÖ´Ù. ¿äÀÇ ÀúÀå ½Ã±â¿¡
´Â ¹æ±¤ ³»ºÎ°¡ ¼öµ¿ÀûÀ¸·Î Àú¾ÐÀ¸·Î À¯ÁöµÇ³ª, ¿äÀÇ ¹èÃâÀº ¹æ±¤±ÙÀÇ ´Éµ¿ÀûÀÎ °­ÇÑ ¼öÃà
·ÂÀ» ÅëÇØ ÀÌ·ç¾îÁø´Ù. ¹æ±¤ÀÇ ¼öÃàÀº ÀÌ»ó¼ºÀÇ ¼ºÁúÀ» °¡Áö°í ÀÖÀ¸¸ç, ÀÚ±ØÀ¸·Î ¹æ±¤ ³»¾Ð
ÀÌ ±Þ°ÝÈ÷ Áõ°¡µÈ ÈÄ ÀÏÁ¤ ±â°£ µ¿¾È À¯ÁöµÇ°í ÀÌ Áõ°¡µÈ ¹æ±¤³»¾Ð¿¡ ÀÇÇØ ¿ä ¹èÃâÀÌ ÀϾî
³­´Ù. °¢ ƯÁ¤ ¼¼Æ÷µéÀº ÇØ´çÀÛ¿ë, »êÈ­Àû ÀλêÈ­, ATP °¡¼öºÐÇصîÀÇ ¼±ÅÃÀû °æ·Î¸¦ ÅëÇÏ¿©
¿¡³ÊÁö¸¦ ¾ò¾î ±× ¼¼Æ÷ÀÇ °íÀ¯ ±â´ÉÀ» ¼öÇàÇÑ´Ù°í ¾Ë·ÁÁ® Àִµ¥, ¹æ±¤ÀÇ °æ¿ì¿¡¼­µµ ¼ö¿ë
ü¸¦ ¸Å°³·Î ÇÏ¿© ÀϾ´Â ¼öÃàÀÇ µÎ ¿ä¼ÒÀÎ À§»ó¼º°ú ±äÀ强 ¹ÝÀÀÀº °¢°¢ ´Ù¸¥ »ýÈ­ÇÐÀû
¹ÝÀÀ¿¡ ÀÇÇÑ ´ë»ç¼º ¿¡³ÊÁö¸¦ ÀÌ¿ëÇÒ ¼ö ÀÖ´Ù. ƯÈ÷ À§»ó¼º ¹ÝÀÀÀº »ê¼Ò¸¦ ÀÌ¿ëÇÏÁö ¾Ê´Â
°úÁ¤°ú °ü·ÃÀÌ ÀÖ°í ±äÀ强 ¹ÝÀÀÀº »ê¼Ò¸¦ ÀÌ¿ëÇÏ´Â °úÁ¤°ú °ü·ÃÀÌ ÀÖ´Ù°í »ý°¢ÇÒ ¼ö ÀÖ´Ù.
ÀúÀÚ´Â º» ¿¬±¸¿¡¼­ Æ÷µµ´çÀÌ ¹æ±¤ ¼öÃà ¹ÝÀÀ¿¡ ¾î¶°ÇÑ ¿µÇâÀ» ¹ÌÄ¡´Â°¡¸¦ ¾Ë¾Æº¸±â À§ÇÏ
¿© Æ÷µµ´çÀÌ Æ÷ÇÔµÈ ¿ë¾×°ú Æ÷ÇÔµÇÁö ¾ÊÀº ¿ë¾×¿¡¼­ ¹æ±¤±Ù ÀýÆí¿¡ ÀüÀå ÀÚ±Ø, bethanechol
¹× KClÀ» Åõ¿©ÇÏ¿© ³ªÅ¸³ª´Â À§»ó¼º ¹ÝÀÀ°ú ±äÀ强 ¹ÝÀÀÀÇ °á°ú¸¦ ºñ±³ ºÐ¼®ÇÏ¿© Æ÷µµ´çÀÇ
¹æ±¤ ¼öÃà ¹ÝÀÀ¿¡ ´ëÇÑ ¿ªÇÒÀ» ±Ô¸íÇÏ°íÀÚ ÇÏ¿´´Ù.

Purpose: The urinary bladder requires an adequate energy supply to maintain
contractile function. The primary metabolic fuel is glucose. Through glycolysis and
oxidative phosphorylation, high energy Phosphate are generated, which in turn supply
the metabolic energy for the contractile activities of the urinary bladder. The aim of this
study was to determine the effects of glucose deprivation and recovery from glucose
deprivation on the phasic and tonic components of the contractile responses of rabbit
bladder strips to field stimulation, bethanechol, and KCl.
Materials and Methods: The urinary bladder bodies of mature male New Zealand
White rabbits were separated from the base above the level of the, ureteral orifices, and
placed in Tyrode's solution containing glucose in 37¡É and equilibrated with 95%
O2 and 5% CO2 Bethanechol(250¥ìM) was left in contact
with the strips for 4 minutes. KCl(120mM) was left in contact with the strips for 4
minutes. Field stimulation(31§Ô, 80V, 1§Â) was maintained for 2minutes. At the end of
each incubation in glucose-free medium(100 minutes for FS, 180 minutes for KCl and
bethanechol), the medium was changed to Tyrode's solution containing glucose(1 §·/§¢)
and stimulations continued for additional 90 minutes. Changes in muscle tension were
measured and recorded on a Grass model 7D polygraph.
Results: The results can be summarized as follow: In response to glucose deprivation,
(1) the tonic responses to Held stimulation, bethanechol, and KCl all decreased at a
significantly greater rate than the phasic responses: (2) the phasic and tonic responses
to field stimulation were both reduced to less than 10% of control. Within 70 minutes of
glucose deprivation; (3) the tonic response to bethanechol and KCl were reduced to
approximately 10% of control within 180 minutes whereas the phasic responses remained
stable at 40 and 30%, respectively; and (4) glucose replacement stimulated a rapid and
nearly complete recovery of the phasic and tonic components of the response to field
stimulation, bethanechol, and KCl.
Conclusions: These results indicate that the tonic responses to all forms of stimulation
are more sensitive to glucose deprivation than phasic responses.

Å°¿öµå

Glucose; Urinary bladder contractility; Rabbit;

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