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ºñ¸¸¾ÆÀÇ ºñ¾ËÄڿüº Áö¹æ°£ ¹ßº´¿¡ ÀÖ¾î Adipokine°ú üÁö¹æºÐÆ÷ ¹× Àν¶¸° ÀúÇ×¼º°úÀÇ ¿¬°ü¼º¿¡ ´ëÇÑ ¿¬±¸ The Role of Adipokines in the Pathogenesis of Non-alcoholic Fatty Liver Disease in Obese Children; the Relationship between Body Fat Distribution and Insulin Resistance

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¾çÇý¶õ ( Yang Hye-Ran ) 
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¼­Á¤±â ( Seo Jeong-Kee ) 
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°íÀ缺 ( Ko Jae-Sung ) 
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Abstract

¸ñ Àû: º» ¿¬±¸¿¡¼­´Â ¼Ò¾Æ ºñ¸¸ ȯÀÚ¿¡¼­ ¹ß»ýÇÏ´Â ºñ¾ËÄڿüº Áö¹æ°£ ÁúȯÀÇ ¹ßº´¿¡ TNF-¥á, adiponectin, leptin µîÀÇ adipokineµéÀÌ ¹ÌÄ¡´Â ¿µÇâÀ» ¾Ë¾Æº¸¸ç, À̵é adipokine°ú üÁö¹æºÐÆ÷ ¹× Àν¶¸° ÀúÇ×¼º°úÀÇ ¿¬°ü¼ºÀ» ÇÔ²² »ìÆ캸°íÀÚ ÇÏ¿´´Ù.

¹æ ¹ý: 2004³â 3¿ù¿¡¼­ 2005³â 6¿ù±îÁö ºÐ´ç¼­¿ï´ëº´¿ø ¼Ò¾Æ°ú¿¡ ³»¿øÇÑ ºñ¸¸ÇÑ ¼Ò¾Æ 61¸íÀ» ´ë»óÀ¸·Î ÇÏ¿© ºñ¾ËÄڿüº Áö¹æ°£ ÁúȯÀÇ »óÅ¿¡ µû¶ó ´ë»ó ȯÀÚµéÀ» Áö¹æ°£ ÁúȯÀÌ ¾ø´Â ¼Ò¾Æ ºñ¸¸ ȯÀÚ(n=23), ´Ü¼ø Áö¹æ°£(n=20), ±×¸®°í ºñ¾ËÄڿüº Áö¹æ°£¿°(n=18)ÀÇ ¼¼ ±ºÀ¸·Î ³ª´©°í, °¢ ȯÀÚ¿¡¼­ Ç÷Áß TNF-¥á, leptin, adiponectin ³óµµ¸¦ ÃøÁ¤ÇÏ°í Àν¶¸° ÀúÇ×¼ºÀÇ ÁöÇ¥·Î¼­ HOMA-IRÀ» °è»êÇÏ¿´À¸¸ç º¹ºÎ Àü»êÈ­´ÜÃþÃÔ¿µ¿¡¼­ VSR (visceral-subcutaneous fat ratio)À» »êÃâÇÏ¿´´Ù.

°á °ú: ÃÑ 61¸í(³² : ¿©=42 : 19, Æò±Õ ¿¬·É 11.2¡¾1.3¼¼)ÀÇ È¯¾Æ¸¦ ´ë»óÀ¸·Î Áö¹æ°£ Áúȯ¿¡ µû¶ó ¼¼ ±ºÀ¸·Î ³ª´©¾úÀ» ¶§, ¼¼ ±º °£ÀÇ ¼ºº°, ¿¬·Éº° Â÷ÀÌ´Â ¾ø¾ú´Ù(p=0.422, p=0.119). °¢ ±ºÀÇ Ç÷Áß TNF-¥á ³óµµ´Â À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾ú°í(22.13¡¾6.37 vs. 21.35¡¾6.95 vs. 25.17¡¾ 9.30; p=0.342), leptin ³óµµ¿¡µµ À¯ÀÇÇÑ Â÷ÀÌ°¡ ¾ø¾úÀ¸³ª 20.29¡¾8.57 vs. 16.42¡¾ 6.85 vs. 20.10¡¾7.86; p=0.330), adiponectinÀº À¯ÀÇÇÑ Â÷À̸¦ º¸¿© ºñ¾ËÄڿüº Áö¹æ°£¿°¿¡¼­ Ç÷Áß³óµµ°¡ ÀÇ¹Ì ÀÖ°Ô °¨¼ÒÇÏ¿´´Ù (6.08¡¾1.38 vs. 5.69¡¾0.79 vs. 4.93¡¾1.75; p=0.026). º¹ºÎ Àü»êÈ­´ÜÃþÃÔ¿µ¿¡¼­ »êÃâÇÑ VSRµµ Áö¹æ°£¿°±º¿¡¼­ À¯ÀÇÇÏ°Ô Áõ°¡µÈ ¼Ò°ßÀ» º¸¿´´Ù(0.31¡¾0.08 vs. 0.32¡¾0.11 vs. 0.47¡¾ 0.14; p=0.001). HOMA-IRµµ ¼¼ ±º¿¡¼­ À¯ÀÇÇÑ Â÷À̸¦ º¸¿´´Ù(4.77¡¾3.67 vs. 6.89¡¾7.05 vs. 10.42¡¾6.73; p=0.000). ±×·¯³ª adiponectin°ú HOMA-IR ¶Ç´Â VSR°£¿¡ À¯ÀÇÇÑ »ó°ü°ü°è´Â º¸ÀÌÁö ¾Ê¾Ò´Ù(r=??0.117; p=0.450 & r=??0.106; p=0.499).

°á ·Ð: Àν¶¸° ÀúÇ×¼ºÀº ºñ¸¸ÇÑ ¼Ò¾Æ¿¡¼­ °£ ³» Áö¹æ ÃàÀû°ú Áö¹æ°£¿°À¸·ÎÀÇ ÁøÇà°úÁ¤¿¡ ¸ðµÎ ¿µÇâÀ» ¹ÌÄ¥ °ÍÀ¸·Î ÃßÁ¤µÇ¸ç, ºñ¸¸ÇÑ ¼Ò¾ÆÀÇ Áö¹æÁ¶Á÷¿¡¼­ ºÐºñµÇ´Â adipokine Áß¿¡¼­ adiponectinÀÌ ´Ü¼øÁö¹æ°£¿¡¼­ Áö¹æ°£¿°À¸·ÎÀÇ ÀÌÇàÇÏ´Â ±âÀü¿¡ °ü¿©ÇÒ °ÍÀ¸·Î ¿©°ÜÁø´Ù.

Purpose: This study was conducted to evaluate the role of adiponectin, leptin, and tumor necrosis factor-¥á (TNF-¥á) in the pathogenesis of non-alcoholic fatty liver disease (NAFLD) in obese children, and to elucidatethe relationship between these adipokines and insulin resistance.

Methods: A total of 61 obese children (M : F=42 : 19, mean age 11.2¡¾1.3 years) admitted to our facility between March 2004 and June 2005 were included in this study. Patients were divided into three groups based on their NAFLD status obese children without fatty liver (N=23); obese children with simple steatosis (N=20); and obese children with non-alcoholic steatohepatitis (NASH) (N=18). The serum levels of adiponectin, leptin, and TNF-¥á were measured, and insulin resistance determined by homeostasis model assessment (HOMA-IR) was calculated to estimate insulin resistance. In addition, the VSR (visceral- subcutaneous fat ratio) was estimated using abdominal computed tomography.

Results: There was no difference in serum TNF-¥á and leptin levels observed between the 3 groups (22.13¡¾6.37 vs. 21.35¡¾6.95 vs. 25.17¡¾9.30; p=0.342 & 20.29¡¾8.57 vs. 16.42¡¾6.85 vs. 20.10¡¾7.86; p=0.330). However, the serum adiponectin level was significantly lower in children with non-alcoholic steatohepatitis (NASH) than in the other two groups (6.08¡¾1.38 in children without steatosis vs. 5.69¡¾0.79 in simple steatosis vs. 4.93¡¾ 1.75 in NASH; p=0.026). In addition, the VSR was significantly increased in the NASH group (0.31¡¾0.08 vs. 0.32¡¾0.11 vs. 0.47¡¾0.14; p=0.001), and HOMA-IR revealed a significant difference among the three groups (4.77¡¾3.67 vs. 6.89¡¾7.05 vs. 10.42¡¾6.73; p=0.000). However, there was no significant correlation observed between the adiponectin levels and the HOMA-IR or the VSR (r=??0.117; p=0.450 & r=??0.106; p=0.499).

Conclusion: Insulin resistance may affect the development of hepatic steatosis and steatohepatitis in children, and the results of this study suggest that, of several adipokines evaluated, adiponectin is important in the progression of steatosis to steatohepatitis in obese children. (Korean J Pediatr Gastroenterol Nutr 2007; 10: 185¡­192)

Å°¿öµå

Non-alcoholic fatty liver disease;Adiponectin;Insulin resistance;Obesity;Children

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