KR102240833B1 - let-7 억제제가 도입된 엑소좀을 이용한 골분화 억제방법 - Google Patents
let-7 억제제가 도입된 엑소좀을 이용한 골분화 억제방법 Download PDFInfo
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Abstract
Description
도 1b는 엑소좀 방출 억제제(SPI) 처리 후 ALP(alkaline phosphatase) 활성을 측정한 결과이다.
도 1c는 엑소좀 방출 억제제(SPI)만 처리한 경우 및 엑소좀 방출 억제제(SPI)와 성장 배지에서 얻어진 엑소좀을 함께 처리한 경우를 비교한 결과이다.
도 1d는 다른 종류의 엑조좀 방출 억제제(GW4869)를 처리한 경우 ALP 활성을 측정한 결과이다.
도 1e는 qRT-PCR(quantitative Reverse Transcriptase-polymerase chain reaction)을 통해 엑소좀 방출 억제제(SPI)만 처리한 경우 및 엑소좀 방출 억제제(SPI)와 성장 배지에서 얻어진 엑소좀을 함께 처리한 경우 오스테오칼신(Osteocalcin, OCN)의 발현 정도를 비교한 결과이다.
도 2a 및 2b는 MC3T3-E1 세포에서 추출한 엑소좀 miRNA의 RNA-Seq을 수행한 결과를 그래픽으로 나타낸 것이다.
도 2c는 GM(growth medium) 및 OM(osteogenic medium)의 엑소좀에서 let-7 패밀리의 상대적 발현 정도를 비교한 결과이다.
도 2d는 GM(growth medium) 및 OM(osteogenic medium)에서 MC3T3-E1 세포로부터 얻어진 let-7 패밀리의 상대적 발현 정도를 비교한 결과이다.
도 3a는 MC3T3-E1 세포에서 let-7 패밀리 발현의 세포 수준을 조건을 달리하여 측정한 결과이다.
도 3b는 let-7 유사체(mimic)을 처리한 경우 골형성 인자들의 발현 정도를 측정한 결과이다.
도 3c는 let-7 안타고미르(antagomir)를 처리한 경우 골형성 인자들의 발현 정도를 측정한 결과이다.
도 4a는 let-7 억제제가 형질감염된 엑소좀(at-exo)의 제조방법을 간략히 나타낸 것이다.
도 4b는 엑소좀의 전기천공(electroporation) 전, 후 전자 현미경을 통해 엑소좀의 물리적 변화 여부를 관찰한 결과이다.
도 4c는 본 발명의 엑소좀의 주요 크기 분획을 그래프로 나타낸 것이다.
도 4d는 스피로에폭사이드와 함께 at-exo로 처리한 MC3T3-E1 세포에서는 ALP 측정 결과 분화 회복능력이 손상되었음을 확인한 사진이다.
도 4e는 GC-exo 또는 at-exo를 처리한 경우 골형성 유전자 (OCN, Col1a, RunX2 및 OSX)의 발현을 비교한 것이다(GC-exo : 성장조건배지에서의 엑소좀).
도 4f는 GC-exo 또는 at-exo를 처리한 경우 면역형광염색 및 공초점 현미경 관찰 결과를 나타낸 사진이다.
도 5a는 let-7 유사체 또는 let-7 안타고미르를 처리한 경우 Lin28의 상대적 발현 정도를 비교한 결과이다.
도 5b는 GC-exo 또는 at-exo를 처리한 경우 Lin28의 상대적 발현 정도를 비교한 결과이다.
도 6은 본 발명인 let-7 억제제가 형질감염된 엑소좀을 이용한 골분화 억제방법의 내용을 간략히 요약한 것이다.
let-7a | UGAGGUAGUAGGUUGUAUAGUU | 서열번호 1 |
let-7b | UGAGGUAGUAGGUUGUGUGGUU | 서열번호 2 |
let-7c | UGAGGUAGUAGGUUGUAUGGUU | 서열번호 3 |
let-7d | AGAGGUAGUAGGUUGCAUAGUU | 서열번호 4 |
let-7e | UGAGGUAGGAGGUUGUAUAGUU | 서열번호 5 |
let-7f | UGAGGUAGUAGAUUGUAUAGUU | 서열번호 6 |
let-7g | UGAGGUAGUAGUUUGUACAGUU | 서열번호 7 |
let-7i | UGAGGUAGUAGUUUGUGCUGUU | 서열번호 8 |
Gene | Primers |
Hprt OCN Col1a RunX2 OSX Lin28 |
Forward: CCT AAG ATG ATC GCA AGT TG(서열번호 9) Reverse: CCA CAG GGA CTA GAA CAC CTG CTA A(서열번호 10) Forward: CCG GGA GCA GTG TGA GCT TA(서열번호 11) Reverse: TAG ATG CGT TTG TAG GCG GTC(서열번호 12) Forward: CA CCC CAG CCG CAA AGA GT(서열번호 13) Reverse: CG GGC AGA AAG CAC AGC ACT(서열번호 14) Forward: CT CAG TGA TTT AGG GCG CAT T(서열번호 15) Reverse: AG GGG TAA GAC TGG TCA TAG G(서열번호 16) Forward: GG AGG TTT CAC TCC ATT CCA(서열번호 17) Reverse: TA GAA GGA GCA AGG GGA CAG A(서열번호 18) Forward: AGT CTG CCA AGG GTC TGG AA(서열번호 19) Reverse: C GCT CAC TCC CAA TAC AGA ACA(서열번호 20) |
1st set | 2nd set | |||
GM exosomal miRNAs 1 | OM exosomal miRNAs 1 | GM exosomal miRNAs 2 | OM exosomal miRNAs 2 | |
Number of reads | 13808067 | 208512782 | 14623492 | 13455855 |
Number of alignments | 130547112 | 113875006 | 116271213 | 128606785 |
Number of aligned reads | 11593864 | 11623710 | 11899857 | 10353479 |
Claims (6)
- (a) 골모세포(osteoblast)로부터 엑소좀(exosome)을 분리하는 단계;
(b) 상기 (a)단계에서 분리한 엑소좀에 let-7 억제제를 도입하는 단계; 및
(c) 상기 (b)단계에서 let-7 억제제가 도입된 엑소좀을 골모세포에 처리하는 단계를 포함하는, 골분화 억제 방법으로서,
상기 let-7은 서열번호 1 내지 서열번호 8로 이루어진 군에서 선택된 하나 이상의 염기서열로 표시되고, 상기 let-7 억제제는 골형성 인자의 발현을 억제하며,
상기 방법은 시험관 내(In vitro)에서 이루어지는 것을 특징으로 하는, 골분화 억제 방법.
- 삭제
- 제1항에 있어서,
상기 억제제는 상기 let-7에 특이적으로 결합하는 핵산 분자인 것을 특징으로 하는, 골분화 억제 방법.
- 제3항에 있어서,
상기 핵산 분자는 RNA(Ribonucleic acid), DNA(deoxyribonucleic acid), 리보자임(ribozyme), 압타머(aptamer), 안타고미르(antagomir), siRNA(small interfering RNA), miRNA, shRNA(short hairpin RNA), PNA(peptide nucleic acid) 및 LNA(locked nucleic acid)로 이루어진 군으로부터 선택된 하나 이상인 것을 특징으로 하는, 골분화 억제 방법.
- 삭제
- 제1항에 있어서,
상기 골형성 인자는 오스테오칼신(osteocalcin), 콜라겐 타입1 알파(Col1a), 렁스2(RunX2) 및 오스테릭스(OSX)로 이루어진 군으로부터 선택된 1 이상인 것을 특징으로 하는, 골분화 억제 방법.
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