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Helicobacter pylori °¨¿°°ú °ü·ÃµÈ ö °áÇ̼º ºóÇ÷¿¡¼­ Lactoferrin SequestrationÀÇ ¿ªÇÒ Lactoferrin Sequestration and Its Contribution to Iron Deficiency Anemia in Helicobacter pylori Infected Gastric Mucosa

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Abstract

¹è°æ: LactoferrinÀº À§Àå Á¡¸·¿¡¼­ H. pyloriÀÇ Ã¶ºÐÀÇ °ø±Þ¿øÀ¸·Î ¾Ë·ÁÁ® ÀÖ´Ù. º» ¿¬±¸´Â H. pylori¿¡ °¨¿°µÈ À§Àå Á¡¸·ÀÇ Á¶Á÷°Ëü¿¡¼­ lactoferrin °ªÀ» ÃøÁ¤ÇÏ°í ö °áÇ̼º ºóÇ÷ÀÇ À¯¹«¿¡ µû¶ó lactoferrin ¹ßÇöÀÇ ÁÖ¿ä À§Ä¡¸¦ Á¤ÇÏ´Â ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿©
lactoferrin°ú ö °áÇ̼º ºóÇ÷À» µ¿¹ÝÇÑ H. pylori°¨¿° »çÀÌÀÇ ¿¬°ü¼ºÀ» ¹àÈ÷±â À§ÇØ ½ÃÇàÇÏ¿´´Ù.

¹æ¹ý: »óºÎ À§Àå°ü ³»½Ã°æÀ» ½ÃÇàÇÑ 55¸íÀÇ È¯¾Æ¸¦ ¼¼ ±ºÀ¸·Î ºÐ·ùÇÏ¿´´Ù: Á¤»ó±º(NL, n=19), H. pylori °¨¿°±º(HP, n=15), H. pylori °¨¿°ÀÌ µ¿¹ÝµÈ ö°áÇ̼º ºóÇ÷±º(IDA, n=21). Á¶Á÷ º´¸®ÇÐ ¼Ò°ßÀº Updated Sydney SystemÀ» ÀÌ¿ëÇÏ¿© Á¤µµ¸¦ ³ª´©¾ú´Ù. À§Àå Á¡¸·ÀÇ lactoferrin °ªÀº ¸é¿ª ÃøÁ¤¹ýÀ¸·Î ÃøÁ¤ÇÏ¿´´Ù. lactoferrinÀÇ ¹ßÇö À§Ä¡¿Í ¾çÀ» ÃøÁ¤ÇÏ´Â °ÍÀº ¸é¿ªÁ¶Á÷È­ÇÐÀû ¿°»ö¹æ¹ýÀ» ÀÌ¿ëÇÏ¿´´Ù.

°á°ú: À§ ÀüÁ¤ºÎ¿¡¼­ÀÇ lactoferrinÀÇ °ªÀº Á¶Á÷ °ËüÀÇ H. pylori ¹Ðµµ³ª ´ÙÇüÇÙ¼¼Æ÷ÀÇ Ä§½ÀÁ¤µµ, ¸¸¼º ¿°Áõ¿¡ ºñ·ÊÇÏ¿© ÀǹÌÀÖ°Ô Áõ°¡µÇ¾ú´Ù. HP¿Í IDA±º¿¡¼­´Â Á¤»ó±º¿¡ ºñÇÏ¿© lactoferrinÀÇ ¼öÄ¡°¡ Åë°èÇÐÀûÀ¸·Î À¯ÀÇÇÏ°Ô Áõ°¡µÇ¾ú´Ù(p=0.0001). IDA±ºÀº HP±º¿¡ ºñÇÏ¿© lactoferrinÀÇ ¼öÄ¡°¡ ³ôÀº °æÇâÀÌ ÀÖ¾ú´Ù(p=0.2614). ¸é¿ªÁ¶Á÷È­ÇÐÀû ¹æ¹ý¿¡ ÀÇÇÑ lactoferrin ¹ßÇöÀÇ ÁÖ¿äºÎÀ§´Â »óÇǼ¼Æ÷³»ÀÇ ºÐºñ»ù°ú È£Áß±¸¿¡ ÀÖ¾ú´Ù. LactoferrinÀº Á¤»ó±º¿¡¼­´Â ¾àÇÏ°Ô ¿°»öµÇ¾ú°í HP¿Í IDA±º¿¡¼­´Â °­ÇÏ°Ô ¿°»öµÇ¾ú´Ù.

°á·Ð:IDA±º¿¡¼­ À§Àå Á¡¸·³» lactoferrin °Ý¸®°¡ ÇöÀúÇÏ¿´À¸¸ç ÀÌ ¼Ò°ßÀº H. pylori °¨¿°ÀÌ Ã¶ °áÇ̼º ºóÇ÷¿¡ ¿µÇâÀ» ¹ÌÄ¡´Â ±âÀüÀ» ¹àÈ÷´Âµ¥ Áß¿äÇÑ ´Ü¼­·Î ÀÛ¿ëÇÒ °ÍÀÌ´Ù.

Purpose: It is known that lactoferrin serves as a source of iron for H. pylori in gastric mucosa. This study was undertaken to investigate the relationship between lactoferrin and H. pylori infection coexistent with iron-deficiency anemia
by determining the lactoferrin levels in gastric biopsy specimens, and by locating the major sites of lactoferrin expression, according to the presence or absence of iron-deficiency anemia.

Methods: Fifty-five adolescents that underwent gastroduodenoscopy were divided into three groups: NL (n=19) for normal controls, HP (n=15) for patients with H. pylori, and IDA (n=21) for patients with H. pylori gastritis and coexisting iron-deficiency anemia. Histopathologic features were graded from null to marked on the basis of the Updated Sydney System. The gastric mucosal levels of lactoferrin were measured by immunoassay. Immunohistochemical technique was used to allow identification of the location and quantification of the lactoferrin expression.

Results: Lactoferrin levels in the antrum increased significantly, in proportion to, H. pylori density, polymorphonuclear cell infiltration, and chronic inflammation in the histologic specimens. Patients in the HP and IDA groups showed significantly increased mucosal levels of lactoferrin compared with that observed in the normal group (p=0.0001). The lactoferrin level in IDA group tended to be higher than that in the HP group (p=0.2614). The major sites of lactoferrin expression by immunohistochemistry were in glands and neutrophils within epithelium. Lactoferrin was stained weakly in NL, and strongly in HP and IDA.

Conclusion: The lactoferrin sequestration in the gastric mucosa of IDA was remarkable, and this finding seems to give a clue that leads to the clarification of the mechanism by which H. pylori infection contributes to iron-deficiency anemia.

Å°¿öµå

Helicobacter pylori;Iron-deficiency anemia;Lactoferrin sequestration

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