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À¯ÀüÀÚÇü¿¡ µû¸¥ Streptococcus mutansÀÇ subtyping: Southern blot RFLP¿Í AP-PCRÀ» ÀÌ¿ëÇÑ ºñ±³

EVALUATING TWO METHODS FOR FINGERPRING GENOMES FOR STREPTOCOCCUS MUTANS IN CHILDREN : A COMPARISION WITH AP-PCR AND SOUTHERN BLOT RFLP

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Abstract

°á·Ð
º» ¿¬±¸¿¡¼­´Â À¯Ä¡¿­±â ¾Æµ¿ÀÇ Ä¡Å³»ÀÇ Ä¡¾Æ¿ì½Ä ¿øÀαÕÀ¸·Î ¾Ë·ÁÁø S. mutansÀÇ À¯Àü
ÀÚÇüÀ» ºÐ·ùÇϱâ À§ÇÑ arbitrarily primed PCR(AP-PCR)°ú Åë»óÀûÀÎ À¯ÀüÇÐÀû ±â¹ýÀÎ probe
¸¦ ÀÌ¿ëÇÑ Southern blot Restriction Fragment Length Potymorphi (RFLP) ¹æ¹ýÀ» ÀÌ¿ëÇÏ
¿© ¾Æµ¿ÀÇ ±¸°­³»¿¡ »óÁÖÇÏ´Â S. mutansÀÇ DNA fingerprinting patternÀ» ºñ±³ °üÂûÇÏ¿© À¯
ÀüÇÐÀû ºÐ·ùÀÇ ÀûÇÕ¼º ¹× µÎ ¹æ¹ý°£ÀÇ »óÈ£ °ü·Ã¼ºÀ» ¸ð»ö ÇÏ°íÀÚ º» ¿¬±¸¸¦ ½ÃÇàÇÑ °á°ú
´ÙÀ½°ú °°Àº °á·ÐÀ» ¾ò¾ú´Ù.
1. 3Á¾ÀÇ primer¸¦ ÀÌ¿ëÇÑ AP-PCR¿¡¼­´Â primer¿¡ µû¶ó 9, 10, 12°¡ÁöÀÇ À¯ÀüÀÚÇüÀ» È®
ÀÎ ÇÒ ¼öÀÖ¾ú´Ù.
2. AP-PCR °á°ú S. mutansÀÇ À¯ÀüÀÚÇüÀ» °³Ã¼º°·Î Á¾ÇÕÇÑ °á°ú ÃÖÁ¾ÀûÀ¸·Î 14 °¡Áö
typeÀ¸·Î ºÐ·ùÇÒ ¼ö ÀÖ¾úÀ¸¸ç, Southern blot analysis¿¡¼­´Â 2°¡Áö band pattemÀ» º¸¿©
AP-PCR¿¡ ÀÇÇÑ ºÐ·ù¹ýÀÌ º¯º°·ÂÀÌ ³ô¾Ò´Ù.
3. AP-PCRÀº ´Üµ¶ ¶Ç´Â Southern blot ±â¹ý°ú ÇÔ²² ¾Æµ¿ÀÇ ±¸°­³» S. mutans¿¡ ´ëÇÑ À¯
ÀüÀÚÇü ºÐ·ù¿¡ À¯¿ëÇÑ ¹æ¹ýÀÓÀ» È®ÀÎÇÒ ¼ö ÀÖ¾ú´Ù.
#ÃÊ·Ï#
The arbitary primer polymerase chain reaction(AP-PCR) and Southern blot restriction
fragment length polymorphism(RFLP) were used to genotype the cariogenic pathogen S.
mutans in children. Following the morphologic chracteristrics of colony on selective
medium for S. mutans, total genomic DNA from 155 strains was extracted by
conventinal methods. Among 155 strains, 143 strains(92.3%) were confirmed S. mutans
by PCR with dexA gene and 114 strains were used in this study.
There random sequence 10-base oligonucleotide primers were chosen for AP-PCR.
The amplified DNA products were separated electrophoretically in a 2% agarose gel
containing ethidium vromide and the banding patterns were compared among different
strians. For RFLP analusis, DNA was digested with EcoRI and BamHI, separated on a
0.7% agarose gel and transferred to a nylon membrane. The membrane was probed with
a previously characterised 1.6 kilobases(kb) DNA fragment cloned from gtf B gene of S.
mutans. The probe was labeled with isotope[32P -¥áCTP], and hybridized
fraaments fragments were detected with intensifying screen. AP-PCR produced 4-8
DNA bands in the 0.25-10 kb regions and distinguished 9, 10 or 12 genotypes,
depending on the specific primer used. Southern bolt RFLP analysis revealed 2
hybridization patterns consistion of 1 DNA fragments 450, 500 bp. These results indicate
that AP-PCR is more discriminative method for genotyping genotyping of S. mutans.

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