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Amylase°¡ Hydroxyapatite Żȸ¿¡ ¹ÌÄ¡´Â ¿µÇâ

EFFECTS OF AMYLASE ON THE DEMINERALIZATION IN HYDROXYAPATITE

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Abstract

°á·Ð
Ÿ¾×¼± ¼±¼¼Æ÷¿¡¼­ ÇÕ¼ºÇÏ´Â ´Ü¹éÁúÀÌ Á÷Á¢¹ý¶ûÁúÀÇ calcium(Ca2+)°ú ÀÎ
(phosphate) ´ë»ç¿¡ °ü¿©Çϸç À̷κÎÅÍ Çü¼ºµÇ´Â acquired pollicleÀº Ä¡¾Æ¿ì½ÄÀ» ¾ïÁ¦ÇÏ´Â
ÀÌÂ÷ ¹æ¾î¸·À¸·Î º¸°í ÀÖ¾î Ä¡ÁúÀÇ Å»È¸¸¦ ¾ïÁ¦ÇÏ´Â ±Ùº»ÀûÀÎ ¿äÀÎÀÇ Çϳª·Î Ÿ¾×³» ´Ü¹éÁú
ÀÇ Á¶¼ºÀ» µé ¼ö ÀÖ¾î Ÿ¾×´Ü¹éÁúÀÎ amylase°¡ ¹ý¶ûÁú Żȸ¿¡ ¹ÌÄ¡´Â ¿µÇâÀ» ±¸¸íÇÏ°íÀÚ
ÇÏ¿´´Ù. ÀÌ¿Í ´õºÒ¾î Ä¡¾Æ¿ì½ÄÁõÀ» ¿¹¹æÇϴµ¥ ³Î¸® »ç¿ëµÇ¾î¿Â ºÒ¼Ò´Â Streptococuss
mutans(S. mutans)ÀÇ ´ë»ç°úÁ¤À» ¾ïÁ¦ÇÔ°ú µ¿½Ã¿¡ ¹ý¶ûÁú Żȸ¿Í ±ä¹ÐÈ÷ ¿¬°èµÈ °ÍÀ¸·Î ¿©
°ÜÁ® ºÒ¼Ò°¡ S. mutans¿¡ ÀÇÇÑ ¹ý¶ûÁú Żȸ¿¡ ¹ÌÄ¡´Â º¯È­¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.
ÀΰøŸ¾×°ú hydoroxyapatite(HA) bead¸¦ ±¸°­¸ðµ¨ charmer¿¡ À§Ä¡½ÃÅ°°í ¹è¾çÇÑ S.
mutans¸¦ ³ÖÀº ÈÄ Å¸¾× ´Ü¹éÁúÀÎ amylase¿Í albuminÀÌ S. mutans¿¡ ÀÇÇØ À¯µµµÈ ¹ý¶ûÁú
Żȸ¿¡ ¹ÌÄ¡´Â ¿µÇâ, ºÒ¼Ò°¡ S. mutans¿¡ ÀÇÇØ À¯µµµÈ ¹ý¶ûÁú Żȸ¿¡ ¹ÌÄ¡´Â È¿°ú, amylase
¿Í albumin¹× ºÒ¼Ò°¡ lactic acid¿¡ ÀÇÇØ À¯µµµÈ ¹ý¶ûÁú Żȸ¿¡ ¹ÌÄ¡´Â ¿µÇâ µîÀ» ºñ±³ ºÐ¼®
ÇÏ¿© ´ÙÀ½°ú °°Àº °á°ú¸¦ ¾ò¾ú´Ù.
1. S. mutans¿¡ ÀÇÇÑ HA beadÀÇ Å»È¸´Â Ãʱâ 60ºÐ µ¿¾È¿¡´Â õõÈ÷ Áö¼ÓÀûÀ¸·Î ÀÌ·ç¾î
Áö´Ù°¡ 60ºÐ ºÎÅÍ 150ºÐ ±îÁö´Â Żȸ°¡ ´õ¿í »¡¸® ÀÌ·ç¾îÁö´Â ¾ç»óÀ» º¸¿´´Ù.
2. S. mutans¿¡ ÀÇÇØ Å»È¸°¡ ÁøÇàµÇ´Â Àü ±â°£ µ¿¾È pH´Â Áö¼ÓÀûÀ¸·Î õõÈ÷ °¨¼ÒÇÏ¿´
´Ù.
3. S. mutans¿¡ ÀÇÇÑ Å»È¸´Â ºÒ¼Ò¿Í amylase óġ¿¡ ÀÇÇØ Åë°èÀûÀ¸·Î À¯ÀÇÀÖ°Ô ¾ïÁ¦µÇ¾ú
À¸³ª(p<0.01), albumin¿¡ ÀÇÇؼ­´Â ¾ïÁ¦µÇÁö ¾Ê¾Ò´Ù.
4. HA bead °¡ Æ÷ÇÔµÈ ÀΰøŸ¾×¿¡ 0.1M lactic acid¸¦ 300¥ìl Åõ¿©ÇÑ °æ¿ì Żȸ°¡ Áï°¢Àû
À¸·Î ºü¸£°Ô ÁøÇàµÇ¾î 10ºÐ ¾È¿¡ °ÅÀÇ ÆòÇü»óÅ¿¡ µµ´ÞÇÏ¿´´Ù.
5. 0.1M lactic acid 300¥ìl Åõ¿©·Î ÀΰøŸ¾×³» pHµµ Áï°¢ °¨¼ÒÇÏ¿© ¼ö ÃÊ ¾È¿¡ ÃÖÀúÄ¡¿¡
µµ´ÞÇÑ ÈÄ ´Ù½Ã Áõ°¡Çϱ⠽ÃÀÛÇÏ¿´À¸¸ç ¾à 10ºÐ ÈÄ ºÎÅÍ´Â Áõ°¡¼Óµµ°¡ ÇöÀúÈ÷ °¨¼ÒÇÏ¿´´Ù.
6. ºÒ¼Ò, amylase, albumin ¸ðµÎ 0.1M lactic acid 300¥ìl Åõ¿©·Î ÀÎÇÑ Å»È¸¸¦ ¾ïÁ¦ÇÏÁö ¸ø
ÇÏ¿´´Ù.
7. 0.1M lactic acid¸¦ ºÐ´ç 5¥ìl ¾¿ õõÈ÷ ÁÖÀÔÇÑ °æ¿ì Żȸ°¡ ºü¸£°Ô ½ÃÀ۵Ǿî Á¡Â÷ÀûÀ¸
·Î ´À·ÁÁö´Â ¾ç»óÀ» º¸¿´À¸¸ç ÀΰøŸ¾×³» pH´Â ºü¸£°Ô °¨¼ÒÇϱ⠽ÃÀÛÇÏ¿© Á¡Â÷ÀûÀ¸·Î ´À·Á
Áö´Â ¾ç»óÀ» º¸¿´´Ù.
8. 0.1M lactic acid¸¦ ºÐ´ç 5¥ìl ¾¿ õõÈ÷ ÁÖÀÔÇÏ¿© ¾ß±âµÈ Żȸ´Â ºÒ¼Ò¿¡ ÀÇÇؼ­´Â ¾ïÁ¦
µÇ¾úÀ¸³ª (p<0.05), amylase¿Í albumin¿¡ ÀÇÇؼ­´Â ¾ïÁ¦µÇÁö ¾Ê¾Ò´Ù.
ÀÌ»óÀÇ °á°ú·Î ¹Ì·ç¾î ºÒ¼Ò¿Í amylase´Â S. mutans¿¡ ÀÇÇØ ¾ß±âµÈ ¹ý¶ûÁú Żȸ ¾ïÁ¦È¿°ú
¸¦ ³ªÅ¸³»´Â ¹Ý¸é albuminÀº Żȸ¾ïÁ¦È¿°ú°¡ ¾ø¾ú´Ù. ºÒ¼Ò¿Í amylase°¡ Żȸ¾ïÁ¦ È¿°ú¸¦
°®´Â ±âÀüÀº ºÒ¼Ò´Â Ä¡¾Æ¿ì½Ä ´Ü°è Áß ¹ý¶ûÁúÀÌ »ê¿¡ ÀÇÇØ Å»È¸µÇ´Â °úÁ¤À» ¾ïÁ¦ÇÏ¿© Ä¡¾Æ
¿ì½Ä ¿¹¹æÈ¿°ú¸¦ ³ªÅ¸³»Áö¸¸ amylas´Â »ê¿¡ ÀÇÇÑ ¹ý¶ûÁú Żȸ¿¡´Â ¿µÇâÀ» ¹ÌÄ¡Áö ¾Ê°í ¼¼
±Õ¿¡ ´ëÇØ Á÷Á¢ÀûÀ¸·Î È¿°ú¸¦ ³ªÅ¸³»¾î Ä¡¾Æ¿ì½Ä ¿¹¹æÈ¿°ú¸¦ °®´Â °ÍÀ¸·Î »ý°¢µÈ´Ù.
#ÃÊ·Ï#
Salivary proteins which are produced in the saliary acinar cells have been known to
be involved in the Calcium and phosphate metabolism. The acquired pellicle resulting
from such metabolism is considered as a secondary defence membrane against tooth
caries. In this respect, some proteins included in saliva probably play an important role
in the provention of demineralization in enamel. On the other hand, fluoride has long
been known to prevent the demineralization of enamel by the inhibition of the growth of
Streptococcus mutans(S. mutans)and by the chemical reaction with calcium and
phosphate, Therefore, 1 have examined the roles of amylase and albumin in the
demineralization of enamel and compared these preteins with fluoride in terms of
anticariogenic effect.
1. The demineralization caused by S. mutans occurred slowly and progressively for
the first 60 min, then the rate of demineralization was accelerated afterwards.
2. pH decreased continuously during the entire period of each experiment.
3. The demineralization was significantly inhibited by the preteatment of amylase and
fluoride but albumin had little effect on it.
4. An addition of 0.1 mM lactic acid (final concentration 0.1 ¥ìM) caused a rapid
increase in calcium concentration reaching a maximum within 10 min.
5. pH decreased rapidly by the addition of 0.1 mM lactic acid and reached a minimum
with-in a few seconds followed by an increase in pH. pH reseed a plateu with 10 min.
6. Fluoride, amylase and albumin played little role in the 0.1 mM lactic acid-induced
demineralization.
7. A slow infusion of 0.1 M lactic acid at a rate of 5 ¥ìl/min caused a slower
increase in calcium concentration compared with the bolus addition of lactic acid.
8. Fluoride had an inhibitory effect on the calcium release caused by slow infusion of
lactic acid while amylase and albumin had no effect on it.
These results suggest that fluoride inhibits demineralization by protecting the HA
from the acid attack whereas amylase has a direct effect on S. mutans to prevent
demineralization.

Å°¿öµå

amylase; calcium; fluoride; hydroxyapatite; pH; salivary protein; Streptococcus mutans;

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