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Helicobacter pylori ¿¬°ü öºÐ °áÇ̼º ºóÇ÷°ú H. pylori pfr À¯ÀüÀÚ ´ÙÇü¼º°úÀÇ °ü·Ã¼º A Possible Relation of the Helicobacter pylori pfr Gene to Iron Deficiency Anemia?

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ÀÌÁöÀº ( Lee Ji-Eun ) 
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ÃÖ¿¬È£ ( Choe Yon-Ho ) 
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Ȳż÷ ( Hwang Tae-Sook ) 
ÀÎÇÏ´ëÇб³ ÀÇ°ú´ëÇÐ º´¸®Çб³½Ç

Abstract

¸ñ Àû: H. pylori °¨¿°Àº ƯÈ÷ »çÃá±â¿¡¼­ öºÐ °áÇÌ ºóÇ÷ÀÇ À¯¹ß¿¡ °ü¿©ÇÏ´Â °ÍÀ¸·Î ¿©°ÜÁø´Ù. H. pyloriÀÇ ferritin ´Ü¹éÁúÀÎ PfrÀº ÁøÇÙ»ý¹°°ú ¿øÇÙ»ý¹°ÀÇ ferritin°ú µ¿ÀÏÇÏ´Ù. º» ¿¬±¸´Â öºÐ °áÇÌ ºóÇ÷ÀÌ Àְųª ȤÀº ¾ø´Â H. pylori ¾ç¼º ÀüÁ¤ºÎÀ§¿°È¯ÀÚÀÇ À§ »ý°Ë Ç¥º»¿¡¼­ H. pylori pfr À¯ÀüÀÚ¸¦ ºñ±³ ºÐ¼®ÇÏ°íÀÚ ÇÏ¿´´Ù.

¹æ ¹ý: ÃÑ 26¸íÀÇ H. pylori ¾ç¼º ÀüÁ¤ºÎÀ§¿° ȯÀÚ(10¡­18¼¼)µéÀ» öºÐ °áÇÌ ºóÇ÷ÀÇ À¯¹«¿¡ µû¶ó µÎ ±ºÀ¸·Î ³ª´µ¾ú´Ù. 16¸íÀÇ È¯ÀÚ°¡ Ç÷¾×ÇÐÀû °Ë»ç¸¦ ÅëÇØ Ã¶ºÐ °áÇÌ ºóÇ÷ÀÌ ÀÖ´Â °ÍÀ¸·Î ¹àÇôÁ³°í ±×µé Áß 2¸íÀÌ ½ÊÀÌÁöÀå ±Ë¾çÀÌ ÀÖ¾ú´Ù. ´Ù¸¥ 10¸íÀº Á¤»óÀûÀÎ Ç÷¾×ÇÐÀû °Ë»ç ¼Ò°ßÀ» º¸¿´´Ù. °¢°¢ÀÇ À§ »ý°Ë Ç¥º»¿¡¼­ DNA ºÐ¸®°¡ ÀÌ·ç¾îÁ³´Ù. 2°³ÀÇ ½Ã¹ßü ¼¼Æ®¸¦ »ç¿ëÇؼ­ pfr À¯ÀüÀÚ ¾ÏÈ£ÀÇ PCR ÁõÆøÀÌ ÇàÇØÁ³°í pfr ºÎÀ§ÀÎ 50 1bp´Â 2°³ÀÇ PCR »ê¹°À» ¿¬°áÇÏ¿© ¿Ï¼ºÇÏ¿´´Ù. nucleotide¿Í ´Ü¹éÁú ¼­¿­ÀÌ Çѱ¹ÀÇ H. pylori ±ÕÁÖ¿Í Genbank¿¡¼­ ±¸ÇÑ NCTC 11638, 26695, J99 ±ÕÁÖÀÇ pfr ºÎÀ§ »çÀÌ¿¡¼­ ºñ±³µÇ¾ú´Ù. ¶ÇÇÑ Ã¶ºÐ °áÇÌ ºóÇ÷ ¾ç¼ºÀÎ ±º°ú À½¼ºÀÎ ±º »çÀÌÀÇ pfr ºÎÀ§¿¡ ´ëÇÑ ¼­¿­ÀÇ ºñ±³°¡ ÇàÇØÁ³´Ù.

°á °ú: pfr À¯ÀüÀÚÀÇ ¾ÏÈ£ ºÎÀ§¸¦ ¿ÏÀüÈ÷ ºÐ¼®ÇÑ °á°ú 3°÷¿¡¼­ ´ÙÇü¼ºÀÌ ¹ß°ßµÇ¾ú´Ù. Ser39Ala µ¹¿¬º¯ÀÌ´Â 100% (26/26)¿¡¼­ ¹ß°ßµÇ¾ú°í Gly111AsnÀº 26.9% (7/26), Gly82SerÀº 11.5% (3/26)¿´´Ù. öºÐ °áÇÌ ºóÇ÷ÀÌ ¾ç¼ºÀÎ ±º°ú À½¼ºÀÎ ±º°£ÀÇ pfr ºÎÀ§ÀÇ ´ÙÇü¼ºÀº ÀÇ¹Ì ÀÖ´Â Â÷ÀÌ°¡ ¾ø¾ú´Ù.

°á ·Ð: pfr À¯ÀüÀÚÀÇ ´ÙÇü¼ºÀº öºÐ °áÇÌ ºóÇ÷°ú °°Àº ÀÓ»óÇ¥ÇöÇü°ú °ü·ÃÀÌ ¾ø¾ú´Ù. H. pylori °¨¿°ÀÌ Ã¶ºÐ °áÇÌ ºóÇ÷À» À¯¹ßÇÑ´Ù´Â ±âÀüÀ» ¸í·áÇÏ°Ô ¹àÈ÷±â À§ÇØ ¼÷ÁÖÃø¸éÀÇ ¿¬±¸³ª ȤÀº ´Ù¸¥ º¹ÇÕÀû ÀÎÀÚ¸¦ °í·ÁÇÑ ¿¬±¸°¡ ÇâÈÄ ÇÊ¿äÇÒ °ÍÀ¸·Î º¸ÀδÙ.

Purpose: H. pylori infection is thought to contribute to iron-deficiency anemia, especially during puberty. The ferritin protein Pfr of H. pylori is homologous to eukaryotic and prokaryotic ferritins. The purpose of this study was to analyze the H. pylori pfr status in gastric biopsy specimens according to clinical data, including antral gastritis with or without iron-deficiency anemia.

Methods: A total of 26 H. pylori-positive patients aged from ten to 18 years were categorized into subgroups based on the presence or absence of iron-deficiency anemia. All of them had antral gastritis. Sixteen patients were proved to have iron-deficiency anemia by hematological study, two of which had a duodenal ulcer. The other ten patients showed normal hematological findings. DNA isolation was performed from each of the gastric biopsy specimens. PCR amplification of the pfr gene coding was done using two sets of primers. The pfr region, 501 bp, was generated by linking the sequences of the two PCR products. The nucleotide and protein sequences were compared between the pfr regions from Korean H. pylori strains and the NCTC 11638, 26695, and J99 strain, which were obtained from the Genbank. Sequence comparisons were also performed for the pfr regions between the iron-deficiency anemia ( ) and ( ) groups.

Results: Analysis of the complete coding region of pfr gene revealed three sites of mutation. The Ser39Ala mutation was found in 100% (26/26), Gly111Asn in 26.9% (7/26), and Gly82Ser in 11.5% (3/26). There were no significant differences in the mutations of the pfr regions between the iron deficiency anemia ( ) and ( ) groups.

Conclusion: The mutation in the pfr gene did not relate with the clinical phenotype, iron deficiency anemia. Further studies are needed on the aspects of host side or other complex factors to elucidate
anemia. Further studies are needed on the aspects of host side or other complex factors to elucidate the mechanisms by which the H. pylori infection might lead to iron deficiency anemia.

Å°¿öµå

Helicobacter pylori;Ferritin;pfr gene;Fron-deficiency anemia;Polymorphism

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