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Çѱ¹ÀÎ ´ç¿øº´ Á¦ IaÇü ȯÀÚÀÇ µ¹¿¬º¯ÀÌ ºÐ¼® Mutation Analysis of Korean Patients with Glycogen Storage Disease Type Ia

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Abstract

¸ñÀû: ´ç¿øº´ IaÇü(von Gierke disease)Àº glucose 6-phosphatase (G6Pase)ÀÇ °áÇÔÀ¸·Î ÀÎÇÏ¿© Ãâ»ý ½ÃºÎÅÍ º¹ºÎÆظ¸°ú °£Á¾´ë°¡ ³ªÅ¸³ª°í ÀúÇ÷´ç, ¶ôÆ®»êÇ÷Áõ(lactic acidemia), °íÁö¹æÇ÷Áõ(hyperlipidemia), °í´¢»êÇ÷Áõ(hyperuricemia) µîÀ» ÃÊ·¡Çϸç Á¡Â÷ ¼ºÀå¹ßÀ°ºÎÀüÀÌ ÁøÇàµÇ´Â »ó¿°»öü ¿­¼º À¯Àü¼º ÁúȯÀÌ´Ù. º» ¿¬±¸¿¡¼­´Â Çѱ¹ÀÎ GSD Ia ȯÀÚ 9¸íÀ» ´ë»óÀ¸·Î G6Pase À¯ÀüÀÚÀÇ µ¹¿¬º¯ÀÌÇü¿¡ °üÇÑ ºÐ¼®À» óÀ½À¸·Î ½ÃÇàÇÏ°íÀÚ ÇÏ¿´´Ù.

¹æ¹ý: ÀÓ»óÀûÀÎ Áõ»ó°ú G6Pase È¿¼Ò ÃøÁ¤°á°ú¸¦ ÅëÇÏ¿© GSD Ia·Î Áø´ÜµÈ 9¸í ȯÀÚÀÇ Ç÷¾×¿¡¼­ genomic DNA¸¦ ºÐ¸®ÇÏ¿© G6Pase À¯ÀüÀÚÀÇ 5°³ exon ºÎºÐÀÌ Æ÷ÇԵǵµ·Ï polymerase chain reaction (PCR) ÇÑ ÈÄ PCR »ê¹°À» direct sequencing ÇÏ¿´´Ù.

°á°ú: 9¸íÀÇ GSD Ia ȯÀÚ Áß 7¸í ȯÀÚ¿¡¼­ g727t homozygote µ¹¿¬º¯À̸¦ ¹ß°ßÇÏ¿´°í, ÇÑ È¯ÀÚ´Â heterozygote·Î¼­ g727t µ¹¿¬º¯ÀÌ¿Í c611g µ¹¿¬º¯ÀÌ°¡ ¹ß°ßµÇ¾ú´Ù. ³ª¸ÓÁö ÇÑ ¸í¿¡¼­´Â g727t µ¹¿¬º¯ÀÌ Çϳª¸¸ ¹ß°ßÇÒ ¼ö ÀÖ¾ú´Ù. ÇÑ °³ÀÇ allele¿¡¼­ ¹ß°ßµÈ c611g µ¹¿¬º¯ÀÌ´Â exon 4ÀÇ 178¹ø ¾Æ¹Ì³ë»ê prolineÀÌ alanineÀ¸·Î º¯°æµÇ´Â °ÍÀ¸·Î Áö±Ý±îÁö º¸°íµÈ ¹Ù ¾ø´Â
»õ·Î¿î µ¹¿¬º¯ÀÌÀÌ´Ù.

°á·Ð: ÇöÀç±îÁö´Â GSD Iaº´ÀÇ Á¤È®ÇÑ Áø´ÜÀ» À§Çؼ­ ȯÀÚÀÇ °£ »ý°Ë Á¶Á÷¿¡¼­ G6Pase È¿¼ÒÀÇ È°¼ºµµ¸¦ ÃøÁ¤ÇÏ´Â °ÍÀÌ ÇÊ¿äÇÏ¿´À¸³ª Çѱ¹ÀÎ GSD Ia ȯÀÚÀÇ °æ¿ì g727t µ¹¿¬º¯ÀÌ°¡ ´ëºÎºÐÀ» Â÷ÁöÇÏ°í Àֱ⠶§¹®¿¡ ¾ÕÀ¸·Î´Â »ó´ç¼öÀÇ È¯ÀÚ¿¡¼­
Ç÷¾× äÃ븸À¸·Îµµ G6Pase À¯ÀüÀÚ ºÐ¼®À» ÅëÇÑ GSD Áø´ÜÀÌ ¼Õ½±°Ô ÀÌ·ç¾îÁú ¼ö ÀÖÀ¸¸®¶ó°í »ý°¢µÈ´Ù.

Purpose: Glycogen storage disease type Ia (GSD Ia) is an autosomal recessive disorder of glycogen metabolism caused by glucose-6-phosphatase (G6Pase) deficiency. The clinical manifestations of G6Pase deficiency include growth retardation, hepatomegaly, hypoglycemia, lactic acidemia, hyperlipidemia and hyperuricemia. Many mutations of this gene have been found worldwide in various ethnic groups, establishing the molecular basis of GSD Ia. To elucidate a spectrum of the G6Pase gene mutations in Korean, we analyzed mutations in Korean patients with GSD Ia.
Methods: Both alleles of 9 unrelated GSD 1a patients were studied by PCR and direct DNA sequencing methods. In all patients, GSD 1a was diagnosed by the enzyme assay for the liver biopsy specimen.

Results: In Korean, the most prevalent mutation was g727t substitution in exon 5, which has been reported to cause abnormal mRNA splicing: Sixteen out of 18 alleles were found to have this mutation. In addition, we identified one novel mutation, a c611g, converting a proline to an alanine at codon 178.

Conclusion: Our findings suggest that a screening for the g727t mutation by noninvasive molecular method can detect most cases of GSD Ia in Korean patients.

Å°¿öµå

Glycogen storage disease type Ia;GSD;Glucose-6-phosphatase;Mutations;Korean

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