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Abstract

¸ñÀû : Ç÷°ü³»ÇÇÀÇ ±â´ÉÆò°¡´Â µ¿¸Æ°æÈ­ ¹× °üµ¿¸ÆÁúȯÀÇ Áø´Ü°ú Ä¡·á¿¡ ´ëÇÑ ¹ÝÀÀÀ» Æò°¡Çϴµ¥ À¯¿ëÇÑ ÁöÇ¥·Î ¿¬±¸µÇ°í ÀÖ´Ù. ÀÌ¿¡ °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ ȯÀÚ¿¡¼­ Ç÷°ü³»ÇÇÀÇ ±â´ÉÀ» Æò°¡ÇÏ°í, ÁöÁú°­ÇÏÁ¦ Ä¡·á¿¡ µû¸¥ ³»ÇÇÀÇÁ¸¼º Ç÷°üÀ̿ϹÝÀÀÀÇ º¯È­ ¹×
ÁöÁú°­ÇÏÁ¦¿¡
ºÎ°¡ÀûÀ¸·Î ºñŸ¹Î C¸¦ Åõ¿©ÇÑ °æ¿ìÀÇ ³»ÇÇÀÇÁ¸¼º Ç÷°üÀ̿ϹÝÀÀ¿¡ ´ëÇÑ È¿°ú¸¦ ¾Ë¾Æº¸°íÀÚ ÇÏ¿´´Ù.
¹æ¹ý : LDL ÄÝ·¹½ºÅ×·Ñ Ä¡°¡ 130 mg/dLÀÌ»óÀÎ 9¸íÀÇ °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ ȯÀÚ¸¦ ´ë»óÀ¸·Î ÇÏ¿© ¿¬±¸¸¦ ½ÃÇàÇÏ¿´´Ù. Ç÷Áß ÄÝ·¹½ºÅ×·Ñ Ä¡°¡ 200 mg/dL ¹Ì¸¸ÀÎ 11¸íÀÇ Á¤»ó ÀÚ¿øÀÚ¸¦ Á¤»ó±ºÀ¸·Î ÇÏ¿´´Ù. ÁöÁú°­ÇÏÁ¦ Ä¡·á´Â ¸ðµç °íÄÝ·¹½ºÅ×·ÑÇ÷ÁõȯÀÚ¿¡¼­ ÃÖ¼Ò 2°³¿ù °£
½ºÅ¸Æ¾°è ¾à¹°À» »ç¿ëÇÏ¿´´Ù. Plethysmography¸¦ ÀÌ¿ëÇÏ¿© Àü¿ÏÀÇ ¿ëÀûº¯È­¸¦ ÃøÁ¤ÇÏ¿´´Ù. ¾Æ¼¼Æ¿Äݸ°À» ´Ü°èº°·Î ³óµµ¸¦ Áõ°¡½ÃÅ°¸ç µ¿¸Æ ³»·Î ÁÖÀÔÇϸ鼭 Àü¿ÏÇ÷·ù·®À» ÃøÁ¤ÇÏ¿´´Ù. ¶ÇÇÑ ºñŸ¹Î C ¹× »êÈ­Áú¼Ò (nitric oxide, NO) ÇÕ¼º ¾ïÁ¦Á¦ÀÎ L-NMMA¸¦ µ¿¸Æ
³»¿¡
ÁÖÀÔÇϸ鼭 Àü¿ÏÇ÷·ù·®ÀÇ º¯È­¸¦ ÃøÁ¤ÇÏ¿´´Ù.
°á°ú : ¾Æ¼¼Æ¿Äݸ°¿¡ ´ëÇÑ Ç÷°üÀ̿ϹÝÀÀ Áï, ³»ÇÇÀÇÁ¸¼º Ç÷°üÀ̿ϹÝÀÀÀº Á¤»óÄÝ·¹½ºÅ×·ÑÇ÷Áõ ±º¿¡ ºñÇØ °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ±º¿¡¼­ ÀÇ¹Ì ÀÖ°Ô °¨¼ÒÇÏ¿´°í °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ±º¿¡¼­ ½ºÅ¸Æ¾°è ¾àÁ¦ Ä¡·á ÈÄ ³»ÇÇÀÇÁ¸¼º Ç÷°üÀ̿ϹÝÀÀÀÌ Ä¡·á Àü¿¡ ºñÇØ ÀÇ¹Ì ÀÖ°Ô
Áõ°¡ÇÏ¿´´Ù.
¶ÇÇÑ
½ºÅ¸Æ¾°è ¾àÁ¦ Ä¡·áÀüÀÇ °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ±º¿¡¼­ ºñŸ¹Î C Åõ¿©Àüº¸´Ù ºñŸ¹Î C Åõ¿© ÈÄ¿¡ ÃÖ´ë Àü¿ÏÇ÷·ù·®ÀÌ ÀÇ¹Ì ÀÖ°Ô Áõ°¡ÇÏ¿´´Ù. ÇÑÆí ½ºÅ¸Æ¾°èÀÇ ¾à¹°Ä¡·á¸¦ ¹ÞÀº °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ±º¿¡¼­µµ ºñŸ¹Î C Åõ¿© ÈÄ¿¡ ³»ÇÇÀÇÁ¸¼º Ç÷°üÀ̿ϹÝÀÀÀÇ ÀÇ¹Ì ÀÖ´Â
Áõ°¡¼Ò°ßÀ»
º¸¿´´Ù. ÀÌ·¯ÇÑ ºñŸ¹Î CÀÇ ÀÛ¿ë±âÀüÀ» ¾Ë±â À§ÇØ »êÈ­Áú¼Ò ÇÕ¼º¾ïÁ¦Á¦ÀÎ L-NMMA¸¦ ºñŸ¹Î C¿Í ÇÔ²² µ¿¸Æ³» ÁÖÀÔÇÑ °æ¿ì¿¡´Â ºñŸ¹Î C ¸¸À» ÁÖÀÔÇÑ °æ¿ìº¸´Ù ÀÇ¹Ì ÀÖ°Ô ¾Æ¼¼Æ¿Äݸ°¿¡ ´ëÇÑ Àü¿ÏÇ÷·ù·®ÀÌ °¨¼ÒÇÔÀ» ¹ß°ßÇÏ¿´´Ù.
°á·Ð : °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ ȯÀÚ¿¡¼­ÀÇ ³»ÇǼ¼Æ÷ ±â´ÉÀÌ ÁöÁú°­ÇÏÁ¦ Ä¡·á ÈÄ¿¡ È£ÀüµÇ¸ç, µ¿¸Æ ³»·Î ºñŸ¹Î C¸¦ µ¿¸Æ ÁÖÀÔÇÏ´Â °æ¿ì ÁöÁú°­ÇÏÁ¦·Î Ä¡·áÇÑ °íÄÝ·¹½ºÅ×·ÑÇ÷Áõ ȯÀÚ¿¡¼­ ºÎ°¡ÀûÀ¸·Î ³»ÇǼ¼Æ÷ ±â´ÉÀ» È£Àü½ÃÅ´À» º¸¿©ÁÖ¾ú°í ÀÌ·¯ÇÑ ³»ÇDZâ´É¿¡ ´ëÇÑ ºñŸ¹Î
CÀÇ
È¿°ú¿¡´Â NO ÀÇÁ¸ÀûÀÎ ±âÀüÀÌ ÀÛ¿ëÇÔÀ» ½Ã»çÇÏ¿´´Ù.

Background : Hypercholesterolemia is firmly established as a risk factor for the development of atherosclerosis. However the exact mechanism of hypercholesterolemia-related damage to the arterial wall and its relation to the atherosclerotic
process
are
not well known. The endothelium plays an important role for the regulation of vascular tone and the endothelial function is impaired in the presence of risk factors early in the process of atherosclerosis. Assessment of endothelial function
appears
to
be a valuable tool for the diagnosing and therapeutic monitoring of coronary artery disease. Lipid lowering agents and anti-oxidants are known to improve endothelial dysfunction in hypercholesterolemic patients, respectively. The purpose of this
study
is to investigate whether vitamin C has additional benefit on endothelial function of statin-treated hypercholesterolemic patients.
Methods : The endothelial function was estimated using venous occlusion plethysmography (VOP) in 9 hypercholesterolemic patients and 11 healthy volunteers. The strain guage was connected to plethysmograph to record the forearm volume change. A
rapid
cuff inflator was used to inflate the arm cuff to 40 mmHg instantaneuosly thus occluding venous return from the forearm. The measurement of forearm volume change was repeated for 7 times each stage. The patients in the hypercholesterolemic (HC)
group
were treated with the statin, then examined again. The change of the forearm blood flow (FBF) was measured with the acetylcholine infusion through brachial artery and also with intra-arterial vitamin C.
Results : Endothelium-dependent vasodilatation was significantly impaired in the HC group
compared to the control group (15.9¡¾0.9 mL/min/100mL forearm tissue, vs 8.9¡¾0.6 mL/min/100mL forearm tissue, mean¡¾standard error of mean, p<0.05). The FBF increased significantly after statin therapy (8.9¡¾0.6 vs 25.2¡¾1.4 mL/min/100mg forearm
tissue, p<0.05). Vitamin C infusion in these patients results in additional improvement in FBF (25.2¡¾1.4 vs 31.9¡¾2.1, p<0.05).
Conclusion : Endothelium-dependent vasodilatation was significantly impaired in the HC group compared to the control group. The FBF increased significantly after statin therapy. Vitamin C seems to have additional benefit on the endothelial
function
of
statin-treated hypercholesterolemic patients.

Å°¿öµå

Plethysmography; Endothelium; Ascorbic acid; Hypercholesterolemia;

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