KR101583457B1 - 다중 당단백질의 발현량 및 당질변이의 측정을 통한 간암의 예측방법 - Google Patents
다중 당단백질의 발현량 및 당질변이의 측정을 통한 간암의 예측방법 Download PDFInfo
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Abstract
Description
도 2는 실시예 1에서 AFP의 항체를 산화시킨 후, 비오틴 또는 항체를 결합시키고, 결합 여부를 아비딘-HRP를 이용한 웨스턴블랏으로 확인한 결과이다.
도 3은 실시예 2에서 개시한 DNA-항체 복합체가 콘카나발린 A(Concanavalin A)가 인식할 수 없는 구조로 당쇄의 변형이 일어난 것을 나타낸 것이다.
도 4는 AFP를 결합시킨 DNA-항체-항원 복합체의 경우, 복합체 내에 존재하는 항원인 AFP에 의해 콘카나발린 A(Con-A)에 의해 결합되고 이를 정제에 이용할 수 있음을 보여주는 도면이다.
도 5는 DNA-항체 복합체가 렉틴과 결합하는지 여부를 다양한 렉틴과의 결합반응 정도를 나타낸 그래프로, Con A(Concanavalin A), LCA(Lens culinaris lectin), AAL(Aleuria aurantia lectin), L-PHA(phytohemagglutinin L4), E-PHA(phytohemagglutinin E4), DSA(Datura stramonium), SSA(Sambucus sieboldiana lectin) 및 E-셀렉틴(E-selectin)의 렉틴에 대하여 상대적인 결합정도를 확인한 도면이다.
도 6은 실시예 3에서 얻어진 산물이 RNA 전사체임을 나타내주는 도면이다. A는 DNA-태깅된 항체가 NTP 존재 유무에 따라 T7 폴리머라아제와의 반응여부를 확인한 도면으로 2%(w/v)의 아가로스 겔에서 실시한 결과이고, B는 DNase, RNase 또는 RNase 저해제와 함께 처리되었을 때의 RNA 전사체 생산을 확인한 것으로, 여기에서 "DNA-Ab"는 항원이 결합된 상태의 DNA-항체-항원 복합체를 의미한다. C는 전사체와의 반응 시간을 확인한 것으로 20분 이상에서 포화되는 것을 확인한 그래프이다.
도 7은 Hep3B 세포에서 FUT8의 발현에 따른 알파-2-마크로글로블린(A2M)의 푸코실화 형태(Fuco-form)의 고감도 정량검출을 확인한 도면이다. A와 B는 FUT8 및 shFUT8의 처리에 따른 FUT8(Fucosyltransferase 8)의 발현량을 RT-PCR로 확인한 젤사진(A)과 그래프(B)이고, C는 A2M 발현을 면역침강법으로 확인한 것이고, D는 DNA-태깅된 항A2M 항체와 결합을 통해 확인한 것이다.
도 8은 DNA-태깅된 항체 기반의 방법이 면역침강법의 면역블랏(immunoblot)에 비교하여 민감도가 증진된 것을 확인한 결과를 나타낸 것이다. A는 FUT8 발현의 내생적인(endogenous) 발현(mock) 또는 간섭된 Hep3B 세포로부터 획득된 매체 및 야생형(FUT8+/+)과 넉아웃(FUT8-/-) FUT8을 포함하는 MEF 세포로부터 획득한 매체를 확인한 것을 나타냈으며, B는 MEF 세포에서 hAFP 유전자가 동일하게 과발현되지만, AFP-L3의 경우는 FUT8의 넉아웃(FUT8-/-) 세포주에서 발현되지 못하고, 야생형(FUT8+/+)에서만 강력하게 발현하는 것을 AAL을 이용하여 확인한 결과이다. C는 푸코스화 검출의 민감도를 확인하기 위하여, 면역침강(IP)-렉틴 블랏 방식으로 분석 결과를 나타낸 것이고, D는 푸코스화 검출의 민감도를 확인하기 위하여 상기 C와 동일한 조건으로 분석한 항 DNA-태깅 항체 기반의 결과를 나타낸 것이다. E는 IP-렉틴 블랏 방법과 DNA-태깅 항체 기반의 검출 민감도를 그래프로 비교하여 나타낸 것이다.
도 9는 DNA-태깅된 항체 기반의 당단백질 분석 방법으로 임상시료(혈청)을 이용하여 분석한 결과를 나타낸 것이다. A는 두개의 바이얼에 cy3 또는 cy5-표지된 UTP를 각각 10:0 내지 0:10의 비율 범위 내에서 생성된 전사체를 DNA 마이크로 어레이 칩에서 3번 반복하여 정량화한 것이다. B는 상기 A로부터 획득한 형광 강도를 이용하여 작성한 표준 곡선이다. 1:9~9:1의 범위의 두 템플릿 비율에 대응하는 532nm와 635nm 파장에서의 형광강도의 log2 비율로 작성된 것이다. C는 간암환자 임상시료로부터 푸코실화 AFP, HPX 및 A2M을 동시에 분석한 것이다. D는 log2 비율로 AFP, HPX 및 A2M의 푸코실화 정도, 발현량 및 정규화시킨 푸코실화 정도(Normalized Fuco-form = Log2(Fuc-BHCC/Fuc-BNor)-Log2([B]HCC/[B]Nor))를 그래프로 나타낸 것이다.
도 10은 41명의 건강한 정상인, 29명의 간염이 있는 정상인, 34명의 간경변이 있는 정상인 및 92명의 간암환자에 대하여, 측정된 AFP, HPX 및 A2M의 당질변이(푸코실화)를 기준군(reference group; 건강한 사람으로 확인된 그룹)에 대하여 각각 정규화(normalization)한 결과를 그룹별로 나타낸 도면이다.
도 11은 본 발명의 간암 예측방법으로 획득한 인덱스 값(If)을 나타낸 것으로, A는 정상인 92명, 간암환자 104명에 대한 테스트 군의 결과이고, B는 상기 테스트 군의 결과를 검증하기 위하여 측정한 정상인 27명(13명 정상, 6명 간염 및 8명의 간경변)으로 구성된 군과, 간암환자 23에 대한 결과를 나타낸 도면이다.
도 12는 간암(HCC)와 정상인(Normal individual) 사이를 구별하기 위한, 다중 바이오마커인 Fuc-{AFP, HPX, A2M}, Fuc-AFP 및 AFP의 ROC 그래프이다. Fuc-{AFP, HPX, A2M}의 AUROC는 0.889이며, Fuc-AFP 및 AFP의 AUROC는 각각 0.809 및 0.723이다.
5'-3' sequence(서열번호) | ||
T7 promoter | Hydrazine-ATGGAATTCCTAATACGACTCACTATAGGG (1) | |
DNA-tag sequence |
AFP | GTTCTCATAAAATTGCCGCCGGTCCATAGCTTTTTTTTTT-Biotin (2) |
HPX | ATTACCACCCCTATCTCACCGAGTTCGATGTTTTTTTTTT-Biotin (3) | |
A2M | GTATTCTAATGCACCCAACCCTGAGCGTCTTTTTTTTTTT-Biotin (4) | |
DNA microarray probes sequence |
AFP | GCTATGGACCGGCGGCAATTTTATGAGAAC (5) |
HPX | CATCGAACTCGGTGAGATAGGGGTGGTAAT (6) | |
A2M | AGACGCTCAGGGTTGGGTGCATTAGAATAC (7) | |
FUT8 shRNA | CCGGGTCTATAATGACGGATCTATACTCGAGTATAGATCCGTCATTATAGACTTTTTG (8) |
단백질(㎍) | 0.5 | 1 | 2 | 3 | 5 | 10 |
형광강도(Fluorescence Intensity) (×104) |
0.34 | 0.84 | 2.61 | 3.41 | 6.91 | 13.4 |
0.31 | 0.79 | 2.33 | 2.94 | 6.33 | 12.7 | |
0.29 | 0.75 | 2.37 | 2.99 | 6.78 | 13.1 | |
0.39 | 1.11 | 2.77 | 3.05 | 6.45 | 12.9 | |
0.41 | 0.73 | 2.45 | 3.74 | 7.43 | 14.3 | |
0.43 | 0.82 | 2.91 | 3.88 | 7.02 | 15.1 | |
0.33 | 0.87 | 2.67 | 3.48 | 7.23 | 12.4 | |
0.37 | 0.84 | 2.23 | 3.65 | 6.42 | 13.9 | |
0.39 | 0.89 | 2.19 | 3.42 | 6.88 | 13.7 | |
평균 | 0.36 | 0.85 | 2.50 | 3.39 | 6.83 | 13.5 |
표준편차 | 0.047 | 0.111 | 0.249 | 0.339 | 0.376 | 0.850 |
CV (%) | 13.08 | 13.08 | 9.98 | 9.97 | 5.50 | 6.30 |
Ave. CV (%) | 9.65 |
기준 | Control 1 | Control 2 | Control 3 |
나이 | 56 | 54 | 59 |
성별 | M | M | F |
병인(Etiology) | - | - | - |
HBV | - | - | - |
HCV | - | - | - |
알코올 | - | - | - |
빈혈 | - | - | - |
염증(Inflammation) | - | - | - |
AFP level | 3.7ng/㎖ | 3.3ng/㎖ | 2.6ng/㎖ |
HPX level | 713㎍/㎖ | 811/㎖ | 734㎍/㎖ |
A2M level | 2.4mg/㎖ | 2.6mg/㎖ | 2.5mg/㎖ |
Claims (17)
- 생체 시료 내에 포함된 당단백질인 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin)의 발현량 및 당질변이(aberrant glycosylation)를 이용하는 간암의 예측방법에 있어서,
1) 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 각각에 대하여, 특이적인 항체의 N-형 당쇄를 산화시키는 단계;
2) 상기 단계 1)에서 산화된 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 각각의 특이적인 항체에, 프로모터를 포함하고 알려진 서열로 이루어지며, 각각 서로 다른 서열을 갖는 이중가닥 DNA를 공유결합시켜 DNA-태깅된 당단백질의 특이적인 항체를 생성하는 단계;
3) 상기 단계 2)에서 생성된, DNA-태깅된 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 항체 각각에 대하여 1차 렉틴 친화 크로마토그래피를 수행하여 특이적인 항체를 정제하는 단계;
4) 상기 단계 3)에서 정제된, DNA-태깅된 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 항체와 생체시료를 반응시키는 단계;
5) 상기 단계 4)에서 생체시료와 반응된, DNA-태깅된 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 항체와 생체시료의 결합물질에 대하여 2차 렉틴 친화 크로마토그래피를 수행하는 단계;
6) 상기 단계 5)에서 렉틴에 결합된, DNA-태깅된 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 항체로부터 각각의 전사체(transcript)를 생산하는 단계;
7) 상기 생산된 전사체의 양을 DNA 칩에서 측정하여 간암 특이적 푸코실화 당질변이를 측정하는 단계;
8) 상기 측정된 간암 특이적 푸코실화 당질변이를 생체 시료 내에 포함된 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 단백질의 발현량으로 정규화(normalization)하는 단계; 및
9) 상기 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin) 단백질의 발현량으로 정규화한 값(Normalized fuco-form)으로부터 퓨코스화-인덱스(Fuco-index)를 구하고, 이로부터 간암을 예측하는 단계;를 포함하는 것을 특징으로 하는 간암의 예측방법. - 제1항에 있어서, 상기 단계 1)에서 항체의 당쇄를 NaIO4로 산화시키는 것을 특징으로 하는 간암의 예측방법.
- 제1항에 있어서, 상기 단계 2)에서, DNA는 5' 말단을 히드라진 그룹으로 공유 결합시킨 DNA인 것을 특징으로 하는 간암의 예측방법.
- 제1항에 있어서, 상기 단계 2)에서, DNA는 T7 프로모터 및 전사체를 코딩하는 서열을 포함하는 센스가닥의 DNA 및 상기 DNA에 상보적인 서열을 갖는 안티센스가닥의 DNA를 혼성화하여 획득한 이중가닥의 DNA인 것을 특징으로 하는 간암의 예측방법.
- 제1항에 있어서, 단계 2)와 단계 3) 사이에, NaBH4를 이용하여 상기 DNA와 각각의 당단백질 특이적 항체의 결합을 안정화시키는 과정을 부가하는 것을 특징으로 하는 간암의 예측방법.
- 제1항에 있어서, 단계 3)에서 렉틴 친화 크로마토그래피는 L4-PHA(Phytohemagglutinin-L4), LCA(lens culinaris agglutinin), DSA(Datura stramonium agglutinin), AAL(Aleuria aurantia agglutinin), 셀렉틴(Selectin), Con A(Concanavalin-A), WGA(Wheat germ agglutinin), 자칼린(Jacalin), SNA(Sambucus Nigra agglutinin) 및 갈렉틴(galectin) 중에서 선택된 하나 이상의 렉틴을 이용하여 DNA-태깅 항체를 정제하는 것을 특징으로 하는 간암의 예측방법.
- 제1항에 있어서, 단계 5)에서 렉틴 친화 크로마토그래피는 L4-PHA(Phytohemagglutinin-L4), LCA(lens culinaris agglutinin), DSA(Datura stramonium agglutinin), AAL(Aleuria aurantia agglutinin), 셀렉틴(Selectin), Con A(Concanavalin-A), WGA(Wheat germ agglutinin), 자칼린(Jacalin), SNA(Sambucus Nigra agglutinin) 및 갈렉틴(galectin) 중에서 선택된 하나 이상의 렉틴을 이용하여 DNA-태깅 당단백질 특이적 항체-항원 결합체를 포집하는 것을 특징으로 하는 간암의 예측방법.
- 제1항에 있어서, 단계 6)에서 형광 표지된 기질을 사용하여 형광을 띠는 전사체를 생산하는 것을 특징으로 하는 간암의 예측 방법.
- 제1항에 있어서, 상기 단계 8)에서 정규화(normalization)는 하기 식(1)을 이용하여 정규화하는 것을 특징으로 하는 간암의 예측 방법:
식(1)
Normalized Fuco-form = Log2(Fuc-BHCC/Fuc-BNor)-Log2([B]HCC/[B]Nor)
(상기 Fuc-BHCC는 간암환자(HCC)의 시료에서 획득한 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin)의 푸코실화(fucosylation) 정도를 나타내고, Fuc-BNor는 정상인(Normal individual)의 시료에서 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin)의 푸코실화(fucosylation) 정도를 나타내고, [B]HCC는 간암환자(HCC)의 시료에서 획득한 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin)의 발현량을 나타내고, [B]Nor는 정상인(Normal individual)의 시료에서 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin)의 발현량을 나타낸다.) - 제1항에 있어서, 상기 단계 9)에서 정규화된 당질변이(Normalized Fuco-Form)는 알파태아단백질(AFP), 헤모펙신(hemopexin) 및 알파 2-마크로글로불린(α2-macroglobulin)에 대하여, 가중치(weighted values)를 하기 식(2)와 같이 적용한 푸코실화-인덱스(Fuco-Index; If)으로부터 간암을 예측하는 것을 특징으로 하는 간암의 예측방법:
식(2)
푸코실화-인덱스(If) = 0.53Log2(RAFP)+0.29Log2(RHPX)+0.18Log2(RA2M)
(상기 RAFP는 정규화한 AFP의 당질변이 값, RHPX는 정규화한 HPX의 당질변이 값, RA2M은 정규화한 A2M의 당질변이 값을 나타낸다). - 제10항에 있어서, 상기 푸코실화-인덱스(Fuco-Index; If)이 0.38 이상인 경우 간암으로 예측하며, 0.38 미만인 경우 정상으로 예측하는 것을 특징으로 하는 간암의 예측방법.
- 알파태아단백질(AFP) 특이적 항체의 산화된 N-형 당쇄에, 프로모터를 포함하며 알려진 서열로 이루어지고, 알파태아단백질(AFP) 항체에 대해 서로 다른 서열을 갖는 이중가닥 DNA를 공유결합시켜 DNA-태깅된, 간암 예측용 DNA-태깅된 당단백질 특이적 항체.
- 헤모펙신(hemopexin) 특이적 항체의 산화된 N-형 당쇄에, 프로모터를 포함하며 알려진 서열로 이루어지고, 헤모펙신(hemopexin) 항체에 대해 서로 다른 서열을 갖는 이중가닥 DNA를 공유결합시켜 DNA-태깅된, 간암 예측용 DNA-태깅된 당단백질 특이적 항체.
- 알파 2-마크로글로불린(α2-macroglobulin) 특이적 항체의 산화된 N-형 당쇄에, 프로모터를 포함하며 알려진 서열로 이루어지고, 알파 2-마크로글로불린(α2-macroglobulin) 항체에 대해 서로 다른 서열을 갖는 이중가닥 DNA를 공유결합시켜 DNA-태깅된, 간암 예측용 DNA-태깅된 당단백질 특이적 항체.
- 알파태아단백질(AFP) 특이적 항체의 산화된 N-형 당쇄에, 프로모터를 포함하며 알려진 서열로 이루어지고, 알파태아단백질(AFP) 항체에 대해 서로 다른 서열을 갖는 이중가닥 DNA를 공유결합시켜 DNA-태깅된, 간암 예측용 DNA-태깅된 당단백질 특이적 제1항체;
헤모펙신(hemopexin) 특이적 항체의 산화된 N-형 당쇄에, 프로모터를 포함하며 알려진 서열로 이루어지고, 헤모펙신(hemopexin) 항체에 대해 서로 다른 서열을 갖는 이중가닥 DNA를 공유결합시켜 DNA-태깅된, 간암 예측용 DNA-태깅된 당단백질 특이적 제2항체;
알파 2-마크로글로불린(α2-macroglobulin) 특이적 항체의 산화된 N-형 당쇄에, 프로모터를 포함하며 알려진 서열로 이루어지고, 알파 2-마크로글로불린(α2-macroglobulin) 항체에 대해 서로 다른 서열을 갖는 이중가닥 DNA를 공유결합시켜 DNA-태깅된, 간암 예측용 DNA-태깅된 당단백질 특이적 제3항체;
지지체에 결합된 렉틴;
상기 DNA-태깅된 간암예측용 DNA-태깅된 당단백질 특이적 항체의 DNA로부터 전사체를 제조하기 위한 RNA 폴리머라아제;
상기 RNA 폴리머라아제의 기질; 및
상기 전사체를 인식할 수 있는 서열을 포함하는 핵산 칩;을 포함하는 간암 진단용 키트. - 제15항에 있어서, 상기 기질은 발색 또는 발광 기질을 추가적으로 포함하는 것을 특징으로 하는 간암 진단용 키트.
- 제15항에 있어서, 상기 렉틴은 L4-PHA(Phytohemagglutinin-L4), LCA(lens culinaris agglutinin), DSA(Datura stramonium agglutinin), AAL(Aleuria aurantia agglutinin), 셀렉틴(Selectin), Con A(Concanavalin-A), WGA(Wheat germ agglutinin), 자칼린(Jacalin), SNA(Sambucus Nigra agglutinin) 및 갈렉틴(galectin) 중에서 선택된 하나 이상인 것을 특징으로 하는 간암 진단용 키트.
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CN113466456A (zh) * | 2020-03-31 | 2021-10-01 | 中国人民解放军联勤保障部队第九〇〇医院 | 用于肝癌早期诊断的检测甲胎蛋白异质体afp-l3的elisa试剂盒及检测方法 |
EP3877408A4 (en) * | 2018-11-06 | 2022-08-24 | University of Miami | COMPOSITIONS AND PRODUCTION OF RECOMBINANT AAV VIRUS VECTORS CAPABLE OF IN VIVO GLYCOENGINEERING |
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EP3415918A4 (en) * | 2017-04-20 | 2019-01-16 | Korea Basic Science Institute | METHOD FOR DIAGNOSIS OF LIVER CANCER BY MASS SPECTROMETRY OF GLYCOPEPTIDE FROM ALPHA-FETOPROTEIN |
EP3877408A4 (en) * | 2018-11-06 | 2022-08-24 | University of Miami | COMPOSITIONS AND PRODUCTION OF RECOMBINANT AAV VIRUS VECTORS CAPABLE OF IN VIVO GLYCOENGINEERING |
CN113466456A (zh) * | 2020-03-31 | 2021-10-01 | 中国人民解放军联勤保障部队第九〇〇医院 | 用于肝癌早期诊断的检测甲胎蛋白异质体afp-l3的elisa试剂盒及检测方法 |
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