KR101857603B1 - 회전환 증폭을 이용한 miRNA의 형광 검출 방법 - Google Patents
회전환 증폭을 이용한 miRNA의 형광 검출 방법 Download PDFInfo
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Abstract
본 발명의 약학 조성물은, 기존의 qRT-PCR 방법을 이용하는 경우보다 민감도가 뛰어나므로, 표적 miRNA 검출에 유용하게 사용될 수 있다.
Description
도 2는 회전환 증폭을 통한 GO-기반 형광 분석의 개시를 나타낸다. (a) 회전환 주형의 원형화; (b) 전기영동을 통한 RCA 산물의 확인; 및 (c) RCAP 16 또는 21의 존재 여부에 따른 FITC-표지된 PNA21의 형광 방출을 나타낸 그래프.
도 3은 형광 소광에 필요한 GO의 농도를 시각화한 그래프이다.
도 4는 GO-기반 형광 miRNA 검출의 민감도를 측정하기 위하여 miRNA를 10 nM부터 단계적으로 희석하여 측정한 형광 스펙트럼이다. (a) miRNA의 농도 변화에 따른 형광 방출 스펙트럼; 및 (b) 형광 강도와 miRNA 농도 로그 값 사이의 선형 상관관계.
도 5는 세포 내 RNA 샘플에 존재하는 miRNA21의 검출 결과를 나타낸다. (a) miRNA의 농도 변화에 따른 형광 방출 스펙트럼; 및 (b) 형광 강도와 miRNA 농도 로그 값 사이의 선형 상관관계.
도 6은 qRT-PCR 및 GO-기반 형광분석 두 가지의 방법을 사용한 다양한 농도의 miRNA 검출 비교 결과를 나타낸다. (a) qRT-PCR 방법을 사용한 miRNA21의 농도 증가 대비 형광 강도 증가 그래프; (b) GO-기반 miRNA 형광 검출 방법을 사용한 miRNA21의 농도 증가 대비 형광 강도 증가 그래프; 및 (c) miRNA21의 농도에 따른 상대적 형광 강도의 대조 그래프.
도 7은 RCAP의 전기영동 분석 결과 DNA 밴드의 길이가 회전환 증폭 여부를 나타낸다.
도 8은 멀티웰 플레이트를 이용한 GO-기반 형광 miRNA 검출 시스템의 특이성을 나타낸다. (a) 각각 다른 형광단으로 표지한 F-PNA의 miRNA 특이성 확인 그래프; (b) 각각 다른 형광단으로 표지한 F-PNA의 miRNA 혼합물 중 특이적 miRNA와의 결합 확인 그래프; 및 (c) 멀티웰 플레이트를 사용한 miRNA 다중 검출 결과.
도 9는 단일 염기 서열변이를 포함하는 miRNA를 사용한 GO-기반 형광 miRNA 검출 결과를 나타낸다. (a) 야생형 miRNA 서열, 단일 염기 서열변이(붉은색 서열)된 miRNA 서열 및 이에 부합하는 RCT21 DNA 서열(파란색 서열); (b) 전기영동을 통해 확인한 RCAP 밴드의 길이 확인 결과; 및 (c) RCT21 및 F-PNA21의 결합에 의한 형광 검출 결과.
| Oligonucleotide (nts) | 서열 (from 5' to 3 ') |
| miRNA16 (22) | UAG CAG CAC GUA AAU AUU GGC G |
| miRNA21 (22) | UAG CUU AUC AGA CUG AUG UUG A |
| miRNA31 (21) | AGG CAA GAU GCU GGC AUA GCU |
| miRNA155 (23) | UUA AUG CUA AUC GUG AUA GGG GU |
| RCT16 (62) | Phosphate - ACG TGC TGC TA T AAC GAC GAG AAA GGG CTG CCA GAT ACT CTT CGC AAT TTT CGC CAA TAT TT |
| RCT21 (62) | Phosphate - CTG ATA AGC TAT AAC GAC GAG AAA GGG CTG CCA GAT ACT CTT CGC AAT TTT TCA ACA TCA GT |
| RCT31 (61) | Phosphate - GCA TCT TGC CTT AAC GAC GAG AAA GGG CTG CCA GAT ACT CTT CGC AAT TTT AGC TAT GCC A |
| RCT155 (63) | Phosphate - GAT TAG CAT TAA TAA CGA CGA GAA AGG GCT GCC AGA TAC TCT TCG CAA TTT TAC CCC TAT CAC |
| PNA16 (22) | FITC - CGC CAA TAT TTA CGT GCT GCT A |
| PNA21 (22) | FITC - TCA ACA TCA GTC TGA TAA GCT A |
| PNA31 (21) | ATTO550 - AGC TAT GCC AGC ATC TTG CCT FITC - AGC TAT GCC AGC ATC TTG CCT |
| PNA155 (23) | Cy5 - ACC CCT ATC ACG ATT AGC ATT AA FITC - ACC CCT ATC ACG ATT AGC ATT AA |
| miRNA21_G (22) | UAGCUUAUCAUACUGAUGUUGA |
| miRNA21_A (22) | UAGCUUAUCAGUCUGAUGUUGA |
| miR21_RT primer (44) | CTCAACTGGTGTCGTGGAGTCGGCAATTCAGTTGAGTCAACATC |
| miR21_Forward primer (30) | ACACTCCAGCTGGGTAGCTTATCAGACTGA |
| miR21_Reverse primer (16) | TGGTGTCGTGGAGTCG |
| U6 small RNA_RT primer (20) | AAAATATGGAACGCTTCACG |
| U6 small RNA_Forward primer (32) | CGCTTCGGCAGCACATATACTAAAATTGGAAC |
| U6 small RNA_Reverse primer (28) | GCTTCACGAATTTGCGTGTCATCCTTGC |
Claims (12)
- a) 회전환 증폭 방법을 통해 표적 miRNA를 등온증폭시킨 단일가닥 DNA를 준비하는 단계;
b) 상기 단일가닥 DNA를 포함하는 시료에 형광 표지된 PNA 탐침자를 혼합하는 단계;
c) 상기 혼합 이후 단일가닥 DNA에 결합되지 않은 PNA 탐침자를 10 ㎍/mL의 산화그래핀에 흡착시키는 단계; 및
d) 시료의 형광 발현을 측정하여 miRNA가 포함된 시료를 선별하는 단계
를 포함하는 회전환 증폭을 이용한, 1 내지 25개의 뉴클레오티드로 구성된 miRNA의 형광 검출 방법.
- 제 1 항에 있어서, 단계 a)의 회전환 증폭을 위해 표적 miRNA에 상보적으로 설계된 패드락 프로브 DNA(padlock probe DNA)인 회전환 주형에 상기 표적 miRNA가 프라이머로 혼성화되는 것을 특징으로 하는 검출 방법.
- 제 1 항에 있어서, 단계 a)의 회전환 증폭에서 DNA 중합에 phi29 DNA 중합효소를 사용하는 것을 특징으로 하는 검출 방법.
- 삭제
- 제 1 항에 있어서, 상기 형광 표지된 PNA 탐침자가 FITC, ATTO550 및 CY5로 이루어진 군으로부터 선택되는 형광단으로 표지되는 것을 특징으로 하는 검출 방법.
- 제 1 항에 있어서, 상기 miRNA가 정량적으로 검출되고, 상기 miRNA의 검출 한계가 0.4 pM인 것을 특징으로 하는 검출 방법.
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
- 삭제
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| KR102131494B1 (ko) * | 2018-04-17 | 2020-07-07 | 건국대학교 산학협력단 | 중합효소연쇄반응과 회전환 증폭을 이용한 타겟 핵산서열 검출 |
| KR102373532B1 (ko) * | 2020-07-31 | 2022-03-14 | 주식회사 제노헬릭스 | 그래핀 처리를 포함하는 표적 rna 검출 방법 |
| CN116724125A (zh) * | 2021-01-26 | 2023-09-08 | 10X基因组学有限公司 | 用于原位分析的核酸类似物探针 |
| WO2022177367A1 (ko) * | 2021-02-18 | 2022-08-25 | 한국과학기술원 | 등온증폭 및 형광 링 패턴에 기반한 표적 핵산의 다중 검출용 조성물 및 이를 이용한 검출방법 |
| KR102709423B1 (ko) * | 2021-02-19 | 2024-09-24 | 한양대학교 산학협력단 | 회전환 증폭용 패드락 프로브 및 이를 이용한 표적핵산의 다중검출 방법 |
| CN116062741B (zh) * | 2022-11-01 | 2025-04-11 | 成都中医药大学 | 一种用于qRT-PCR检测循环microRNAs的氧化石墨烯及其制备方法和用途 |
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