JP6005272B2 - 胃癌診断及び治療のためのadcy3の用途 - Google Patents
胃癌診断及び治療のためのadcy3の用途 Download PDFInfo
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- JP6005272B2 JP6005272B2 JP2015518309A JP2015518309A JP6005272B2 JP 6005272 B2 JP6005272 B2 JP 6005272B2 JP 2015518309 A JP2015518309 A JP 2015518309A JP 2015518309 A JP2015518309 A JP 2015518309A JP 6005272 B2 JP6005272 B2 JP 6005272B2
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Description
胃癌は、全く症状がない場合から激しい痛みに至るまで様々な様相を示している。また、胃癌の症状は、ある特定の特性を有するのではなく、一般的な消化器症状を示す。一般に、胃癌の初期には、症状がない場合がほとんどであり、あるとしても軽微であり、若干の消化不良や上腹部不便感を感じる程度であることから、ほとんどの人がこれを看過し易く、胃癌の死亡率を高める原因になることが多い。
protection assay)、ノーザンブロッティング(Northern blotting)、DNAチップなどがあるが、これらに制限されるものではない。
assay)、補体固定分析法(Complement
Fixation Assay)、FACS、タンパク質チップ(protein chip)などがあるが、これらに制限されるものではない。
好ましくは、前記mRNA水準を測定する製剤は、本発明のADCY3ポリヌクレオチド又はその断片に対するプライマー対、プローブ、又はアンチセンスヌクレオチド(anti-sense nucleotide)であり、本発明のポリヌクレオチド配列により当業者がプライマー、プローブ、又はアンチセンスヌクレオチド配列を容易にデザインすることができる。
I Microarray、EpiTYPER(登録商標)分析、メチル化特異的なPCR(methylation-specific polymerase chain reaction)(以下、‘MSP’ともいう。)や自動塩基分析などの方法で検査することができる。
前記胃癌の診断方法は、本発明で胃癌マーカーとして明らかにされたADCY3の水準をmRNA水準又はタンパク質水準で検出することで、胃癌の発病を診断することができる。
以下、本発明を、実施例を参照して詳細に説明する。しかし、これらの実施例は、本発明を例示的に実施するためのものであり、本発明の範囲がこれらの実施例に限定されるものではない。
ヒト癌細胞株(SNU−216、SNU−638、SNU−719−KCLB、Seuol, Korea;AGS、KATOIII、MKN28、HCT−116、SNU−81、SK−BT−3、Manassas, USA)、ヒト表皮繊維芽細胞(HDF、ATCCから分譲される。)及び293細胞は10%(v/v)FBSと1×ペニシリン−ストレプトマイシン(Invitrogen, USA)を含む培地(Cellgro,USA)で培養した。ヒト乳房表皮細胞(HMEC、Lonza,Switzerland)は、供給者から提供を受けた方法に従って培養した。また、正常及び胃癌組織(表1)は、国立癌センターの機関倫理審議委員会からヒト対象の研究承認(承認番号:NCCNCS−08−127)を受け、ヘルシンキ宣言の原則に基づいて確保した。
appliedscience, UK)とABI 7500 Fast Real-Time PCR system(Applied Biosystems)を用い、β−アクチンをもとに、相対的な量を測定するか、絶対量(absolute quantification)をもとにする標準曲線を用いて定量を行った。
Biosicence, UK)にUV−固定し、32P−標識されたプローブが含まれたULTRAhyb solution(Ambion,
USA)で、42℃で、一晩間反応させた後、−80℃で、Bio Max MSフィルム(Kodak, USA)を用いて確認した。
ADCY3の過剰発現のために、HEK―293細胞に、Lipofectamine 2000(Invitrogen)を用いて、pAcGFP1−ADCY3ベクターを導入しており、陰性対照群として、pAcGFP1−C1ベクターを導入した。
Biotechnology, USA)、抗−CREB、抗−リン酸化−CREB Ser133(#8212、Cell Signaling Technology, USA)、抗−β−アクチン、抗−α−チューブリン(Sigma-Aldrich, USA)抗体を用い、ウェスタンブロットを通じて総−CREBとリン酸化−CREBの量を測定した。
コロニー形成能は、6ウェルプレートにおいて、1ウェル当たり1×103細胞を7日間培養した後、Diff−Quick(登録商標)で染色し、生き残ったコロニー数を測定し、確認した。
ADCY3とそれらのファミリタンパク質等の発現に伴う活性変化を確認するために、ADCY3発現に伴うcAMP量の増加を確認した。1ウェル当たり2×104個の293細胞を含む96ウェル培養皿上で、400ngのpAcGFP又はpAcGFP−ADCY3を、Lipofectamine 2000を用いて形質導入した。
ADCY3プロモーターのメチル化状態を評価するために、 重亜硫酸塩処理された誘電体DNAに、EZ DNA Methylation−Kit(ZYMO Research, USA)及びEpiDesigner(Sequenom,
USA)を用い、デザインしたメチル化した特異的なプライマーを処理した(表3)。
MS-HRM)を10ngの重亜硫酸塩が処理された誘電体DNAとLightCycler(Roshe applied
science)のResoLight dyeを用い、製造業者から提供された方法で処理した後、Gene scanning program(Roshe)を用いて分析した。重亜硫酸塩配列の確認のために、39CpG部位を含むプロモーター領域を重亜硫酸塩処理した胃癌細胞誘電体DNAから増幅し、TOPO−TAベクター(Invitrogen)を用いてクローニングし、3730xlDNA分析器(Applied
Biosystems)を用いて、配列を確認した。
データの統計学的有意性は、Sutdent’S t−検定を用いて確認した。P−値は、0.05より小さいとき、統計学的に有意と判断した。Sutdent’S t−検定はグループ間の差を測定して行った。
1.胃癌でADCY3の増加された発現
27名の胃癌患者で、正常組織と胃癌組織と間に比較したマイクロアレイ分析結果、ADCY3が胃癌組織及び細胞で顕著に過剰発現されることを確認し、ADCY3が胃癌診断のための遺伝子になり得ることを見出した。このような発見を確認するために、ADCY3の上向−調節がヒト胃癌の進行とどのような関わりあるのか確認するために、本発明者らは、qRT−PCRを遂行し、ADCY3発現量を確認した。6個の胃癌細胞株(SNU−216、SNU−638、SNU−719、AGS、KATOIII、MKN−28)と2個の正常ヒト細胞株(HDF、HMEC)で、ADCY3のmRNA量がほとんどの胃癌細胞株が正常細胞株と比較したとき、顕著に高いことが明らかになった(図1a)。また、21個の韓国の胃癌細胞組織のうちの19個(95%)がADCY3 mRNAの発現が高く示されており、特に、21個中の11個(51.4%)が周辺の正常部位と比較したとき、高いADCY3発現を示した(図1b)。
ADCYファミリは、ADCY1〜ADCY10の10個の互いに異なるメンバーで構成されており、いずれも、それらの活性部位の配列相同性を共有する。進化学的に、ADCY3はClustralWを用いて、それらのオープン・リーディング・フレームを羅列して比較したとき、ADCY2、ADCY4及びADCY7と近い。癌発生でADCY3発現の分析に先立って、ADCYファミリメンバー間のプライマー相互反応性を調べるために、発現データを確認した。胃癌細胞SNU−216、SNU−638、SNU−719、AGS、KATOIII、MKN−28及び正常細胞HDF、HMECで、様々なADCYメンバーの特異的なプライマーでRT−PCRを行ったとき、ADCY3を除いた残りのADCYメンバーは、胃癌特異的に発現しないことを確認した。具体的に、ADCY6及びADCY7は、胃癌細胞及び正常細胞でいずれも発現しており、残りのADCYメンバーはほとんど発現しなく、それぞれの細胞別に一部だけ発現していたことを確認した(図2)。このような結果は、全てのADCYが胃癌で発現するのでなく、ADCYメンバーの中からADCY3だけが胃癌特異的に発現することを意味し、それにより、ADCY3を胃癌特異的マーカーとして利用可能であることが示された。
胃癌でADCY3遺伝子の機能を理解するために、まず、ADCY3が過剰発現された293細胞で細胞移動と浸潤の特性を実験した。細胞移動実験で移動した細胞数は、pAcGFP−ADCY3感染細胞で顕著に増加され(P=0.01)、A564測定によりADCY3が過剰発現されたとき、細胞移動が約43%増加されていたことを確認した(図3a)。細胞移動と同様に、ADCY3が感染された293細胞は、空ベクターコントロールと比較するとき、4.95倍浸潤性(invasiveness)の増加を示した(P=0.02)(図3b)。このような結果は、ADCY3の過剰発現が細胞の移動性と浸潤性を増加させていること示す。また、pAcGFP−ADC3過剰発現が足場依存性細胞増殖(anchorage-dependent cell growth)に影響を及ぼすかを明らかにするために、コロニー形成能を実験した。その結果、空ベクター対照群よりpAcGFP−ADCY3感染細胞で1.5倍増加した(P<0.005)(図3c)。このような結果から、ADCY3が腫瘍形成と関連した効果があることを確認することができた。
癌と関連した遺伝子発現で、DNAメチル化の役割が近頃研究されており、ADCY3 mRNAの発現がDNAメチル化により調節されるのかを確認した。最初に翻訳開始部位(translation start site)の1kb上流を含むADCY3プロモーター部位に対して、メチル化−敏感性高解像度融合(methylation-sensitive
high resolution melting; MS-HRM)分析をした。しかし、高密度(high-density)のCpG部位のため、翻訳開始部位(ATGコドン)の−585から−129上流部位の457bpを含む3個のプライマー対のみが設計されており、その部位をHRMで分析した(図5a)。結果は、明確なメチル化の差を示していない。これは、恐らく、これらの領域が機能を有するCpG島を正確に含まない部位であるからである(図5b)。従って、更に上流に位置した翻訳開始部位の−694から−387を含むCpG島に位置する308bp重亜硫酸塩処理したDNAをクローニングし、塩基配列分析をした。その結果、ADCY3を発現しないKATOIII細胞株は過メチル化(hypermethylation)を、SNU−216、SNU−638、SNU−719、AGSとMKN−28のようなADCY3をたくさん発現する細胞株は、メチル化の量が小さいことを確認した(図5c)。プロモーターCpGメチル化によるADCY発現の調節は、5−Aza−dCのようなジメチル化物質をKATOIII細胞株に処理し、確認した。この処理による結果からADCY3プロモーターのCpG部位、特に、CpG部位31−39がジメチル化され(図5d)、陰性コントロールと比較したとき、qRT−PCRによるADCY3 mRNAの発現量が回復されることを確認した(図5e)。まとめると、このような結果は、プロモーター部位のCpG島のDNAメチル化がADCY3発現を調節することを暗示する。
Claims (6)
- ADCY3(Adenylate cyclase 3)遺伝子のメチル化水準を測定する製剤であって、単離された生物学的試料におけるADCY3遺伝子について当該製剤により測定されるメチル化水準が正常対照群より低ければ当該試料は胃癌であることを示しているとする
胃癌マーカー検出用組成物。 - 請求項1に記載の組成物を含む胃癌診断用キット。
- 前記キットは、RT−PCRキット、競争的RT−PCRキット、リアルタイムRT−PCRキット、DNAチップキット又はタンパク質チップキットであることを特徴とする
請求項2に記載の胃癌診断用キット。 - ADCY3遺伝子のメチル化水準を測定する前記製剤は、
(a)脱メチル化シトシン塩基を修飾する組成物、
(b)配列番号22と配列番号23のヌクレオチドを含むプライマー対、配列番号24と配列番号25のヌクレオチドを含むプライマー対、及び配列番号26と配列番号27のヌクレオチドを含むプライマー対、からなるグループから選ばれる、ADCY3遺伝子のメチル化された配列に特異的な1以上のプライマー対、
(c)配列番号28と配列番号29のヌクレオチドを含む、ADCY3遺伝子配列に特異的なプライマー対、
を含むことを特徴とする
請求項1に記載の組成物。 - (a)単離された生物学的試料を提供する工程と、
(b)ADCY3遺伝子のメチル化水準を測定する製剤で前記生物学的試料を処理する工程と、
(c)前記(b)工程で測定されたADCY3のメチル化水準を正常対照群と比較し、前記生物学的試料のメチル化水準が正常対照群より低いことを胃癌であることを示すものとする工程と、
を含む
ADCY3遺伝子のメチル化水準を測定することにより胃癌の診断用情報を提供する方法。 - (a)ADCY3ポリペプチドを発現する細胞を、胃癌治療剤候補物質で処理する工程と、
(b)前記細胞内のADCY3遺伝子のメチル化水準を測定する工程と、
(c)前記工程(b)において測定された前記メチル化水準が、前記候補物質を処理する前より高い場合、前記候補物質を胃癌治療剤であるとする工程と、
を含む
胃癌治療剤のスクリーニング方法。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2012-0078443 | 2012-07-18 | ||
| KR1020120078443A KR101416147B1 (ko) | 2012-07-18 | 2012-07-18 | 위암 진단 및 치료를 위한 adcy3의 용도 |
| PCT/KR2012/006606 WO2014014157A1 (ko) | 2012-07-18 | 2012-08-20 | 위암 진단 및 치료를 위한 adcy3의 용도 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
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| EP (1) | EP2876444A4 (ja) |
| JP (1) | JP6005272B2 (ja) |
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| WO (1) | WO2014014157A1 (ja) |
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| MA45275A (fr) | 2016-09-30 | 2018-06-20 | Nat Cancer Ct | Procédé d'assistance au diagnostic du risque d'apparition du cancer gastrique et adn artificiel et kit permettant de diagnostiquer le risque d'apparition du cancer gastrique utilisés dans le procédé |
| PE20191482A1 (es) | 2017-03-14 | 2019-10-18 | Novomics Co Ltd | Sistema para predecir el pronostico y beneficio de una quimioterapia adyuvante para pacientes con cancer gastrico en estadio ii y iii |
| CN109652548B (zh) * | 2019-01-21 | 2022-08-05 | 首都医科大学附属北京朝阳医院 | circ-CCNB1作为胃癌和结直肠癌诊断生物标志物和治疗靶点的应用 |
| WO2024001602A1 (zh) * | 2022-07-01 | 2024-01-04 | 圣湘生物科技股份有限公司 | 一种用于检测胃癌的组合物,试剂盒及其用途 |
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| JP4297209B2 (ja) * | 2001-03-30 | 2009-07-15 | 独立行政法人産業技術総合研究所 | Kiaa0172遺伝子の疾病治療及び診断並びに創薬への利用 |
| AU2003265263A1 (en) * | 2002-07-10 | 2004-01-23 | Exelixis, Inc. | ADCY3S AS MODIFIERS OF THE p21 PATHWAY AND METHODS OF USE |
| WO2005100998A2 (en) * | 2004-04-16 | 2005-10-27 | Europroteome Ag | Membrane markers for use in cancer diagnosis and therapy |
| WO2006105642A1 (en) * | 2005-04-05 | 2006-10-12 | British Columbia Cancer Agency | Biomarkers for the detection of lung cancer and uses thereof |
| CN1908189A (zh) * | 2005-08-02 | 2007-02-07 | 博奥生物有限公司 | 体外辅助鉴定肠型胃癌及其分化程度的方法与专用试剂盒 |
| GB0922085D0 (en) * | 2009-12-17 | 2010-02-03 | Cambridge Entpr Ltd | Cancer diagnosis and treatment |
| US20130130354A1 (en) * | 2010-09-28 | 2013-05-23 | CTI Salud S.A. | Novel genes and uses thereof, expression profile of colon, gastric and pancreatic cancer |
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| EP2876444A4 (en) | 2016-03-23 |
| WO2014014157A1 (ko) | 2014-01-23 |
| US10435752B2 (en) | 2019-10-08 |
| US20150240313A1 (en) | 2015-08-27 |
| KR101416147B1 (ko) | 2014-07-09 |
| EP2876444A1 (en) | 2015-05-27 |
| JP2015528694A (ja) | 2015-10-01 |
| KR20140011710A (ko) | 2014-01-29 |
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