JP2015520766A - 組成物及びオリゴヌクレオチドをコンジュゲートする方法 - Google Patents
組成物及びオリゴヌクレオチドをコンジュゲートする方法 Download PDFInfo
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- JP2015520766A JP2015520766A JP2015514032A JP2015514032A JP2015520766A JP 2015520766 A JP2015520766 A JP 2015520766A JP 2015514032 A JP2015514032 A JP 2015514032A JP 2015514032 A JP2015514032 A JP 2015514032A JP 2015520766 A JP2015520766 A JP 2015520766A
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- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H1/00—Processes for the preparation of sugar derivatives
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
- C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
- C07H21/02—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids with ribosyl as saccharide radical
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K19/00—Hybrid peptides, i.e. peptides covalently bound to nucleic acids, or non-covalently bound protein-protein complexes
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- Proteomics, Peptides & Aminoacids (AREA)
- Saccharide Compounds (AREA)
- Medicinal Preparation (AREA)
- Peptides Or Proteins (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
本願は、2012年5月21日付で出願された米国仮出願第61/649766号(その内容全体が引用することにより本明細書の一部をなすものとする)の優先権の利益を主張するものである。
本願は概して、オリゴヌクレオチドの試薬、合成及び精製の分野に関する。より具体的には、本発明は、オリゴヌクレオチド誘導体の組成物及びオリゴヌクレオチドをコンジュゲートする方法に関する。
他に規定のない限り、本明細書中で使用される全ての技術用語及び科学用語は、本発明が属する技術分野の当業者によって一般に理解されるものと同じ意味を有する。本明細書中で使用される核酸化学、生化学、遺伝学及び分子生物学の用語及び記号は、当該技術分野の標準的な論文及び教科書、例えばKornberg and Baker, DNA Replication, Second Edition (W.H. Freeman, New York, 1992)、Lehninger, Biochemistry, Second Edition (Worth Publishers, New York, 1975)、Strachan and Read, Human Molecular Genetics, Second Edition (Wiley-Liss, New York, 1999)、Eckstein, editor, Oligonucleotides and Analogs: A Practical Approach (Oxford University Press, New York, 1991)、Gait, editor, Oligonucleotide Synthesis: A Practical Approach (IRL Press, Oxford, 1984)、Sambrook et al., Molecular Cloning: A Laboratory Manual, 2.sup.nd Edition (Cold Spring Harbor Laboratory, 1989)等に従う。ただし、或る特定の用語を明確にし、参照しやすいように下記に規定する。
アミノリンカーが結合したオリゴヌクレオチドを、当該技術分野で既知の任意の方法(上記の論考を参照されたい)を用いて合成する。図2に示す例では、TFA保護アミンC6リンカーホスホロアミダイト(すなわち、CF3−CO−NH−(CH2)6−O−P((O−CH(CH3)2)2(O−CH2−CH2−CN)が用いられ、これは適切な合成条件を用いてオリゴヌクレオチドの5’−OH末端を固体支持体にカップリングするものである。このカップリングは、ヌクレオチドモノマーのカップリングと同様の条件下で行うことができ、オリゴヌクレオチドを固体支持体に結合させたままで行うことができる。通常通りの合成及び脱保護(RNAについては標準的なアンモニア及びTEA−3HF)の後、混合物をNaClに対して限外濾過して、全てのアンモニア及びアンモニウム塩を除去することができる。最後に、残余分を水で洗浄して過剰な塩を全て除去する。次いで、オリゴヌクレオチド溶液を濃縮してもよい。濃縮物を凍結乾燥してもよく、又はそのまま使用してもよい。
図3に示すように、凍結乾燥したスクアレートモノコンジュゲートを25mMホウ酸ナトリウム緩衝剤(pH=9.2)中に取り、少量のDMSOに溶解した過剰な(例えば10倍〜40倍の)アミノ基(例えばNH2−R)を含有する標的対象で処理した。25mMホウ酸塩緩衝剤で事前限外濾過したモノコンジュゲート(上記を参照されたい)を、凍結乾燥及び再溶解することなく直接アミン/DMSO混合物で処理することができる。
5’ヘキサエチレングリコール(HEG)スペーサリンカーと、それに続く標準的な6炭素アミノリンカーを含有するRNA20マー(20 mer:二十量体)を、標準オリゴヌクレオチド固相合成法を用いて作製した。HEG及びC6アミノリンカー(どちらも市販されている)を、標準オリゴヌクレオチド合成/脱保護プロトコルを用いてホスホロアミダイトとして付加した。上記の実施例1を参照されたい。粗RNAを陰イオン交換クロマトグラフィによって精製し、2K Hydrosart膜で限外濾過した後、凍結乾燥した。凍結乾燥物質のLCMS分析から期待分子量の修飾オリゴヌクレオチドが示された。この凍結乾燥したアミノ修飾RNA(150mg)を3.0mLのリン酸ナトリウムに取り、pH範囲が7〜8の溶液を得た。この溶液に300μLのDMSOに溶解したジメトキシスクアレート100mgを添加した。1時間後のLCMS分析から、図5に示すように、アミノ標識RNAが完全に所望のモノスクアレートへと変換されたことが示された。
加えて、スクアレートとオリゴヌクレオチド(例えばDNA又はRNA)とのモノコンジュゲートの安定性は、モノコンジュゲート中間体を単離し、第2のアミノ標識オリゴヌクレオチドがオリゴヌクレオチドスクアレートモノ付加物の配列と相補的でなくとも、それらを第2のオリゴヌクレオチドとのカップリングに使用することを可能にする。2つの非相補的オリゴヌクレオチドのカップリング(特に一方のオリゴヌクレオチドがDNAであり、他方がRNAである場合)は、非酵素的に行うのが非常に困難である。本発明の方法はこれらの分子へのアクセスをもたらす。
上で述べたように、スクアレートとオリゴヌクレオチド(例えばDNA又はRNA)とのモノコンジュゲートの安定性は、モノコンジュゲート中間体を単離し、それらをその後の第2のオリゴヌクレオチドとのカップリングに使用することを可能にする。この特性を利用し、これらのモノコンジュゲートを使用することで、オリゴヌクレオチドの他の末端に存在する第2のアミノ基(コンジュゲーションの第一段階の間に一時的に保護してもよい)とコンジュゲートし、環状オリゴヌクレオチドを形成することができる。
<ペプチドとのオリゴヌクレオチドモノスクアレートコンジュゲーション>
特許、特許出願、特許公報、定期刊行物、書籍、論文、ウェブコンテンツ等の他の文献の参照及び引用を本開示において行った。かかる文献は全て、その全体があらゆる目的のために引用することにより本明細書の一部をなすものとする。引用することにより本明細書の一部をなすと述べられているが、本明細書に明示的に記載される既存の定義、言説又は他の開示事項と抵触する任意の事項又はその一部は、引用事項と本開示の事項との間に抵触が生じない限りにおいてのみ引用される。抵触の場合には、本開示を好ましい開示として支持することによって抵触が解決される。
本明細書に開示の代表的な例は本発明の説明を助けることを意図し、本発明の範囲を限定することを意図するものでも、そのように解すべきものでもない。実際に、本明細書に提示及び記載されるものに加えて、本発明及びその多くの更なる実施形態の様々な変更が、先の実施例並びに本明細書に引用される科学文献及び特許文献の参照を含む本明細書の全内容から当業者に明らかとなるであろう。先の実施例は、その様々な実施形態及びその均等物において本発明の実施に適用することができる重要な追加情報、例示及び指針を含む。
Claims (22)
- 下記式(A)の構造を有するオリゴヌクレオチド誘導体:
- R2が、前記第1のオリゴヌクレオチドの核酸塩基上の5’ヒドロキシ基、3’ヒドロキシ基又は環外アミノ基に結合した(C1〜C12)リンカーである、請求項1に記載のオリゴヌクレオチド誘導体。
- Z2がNHである、請求項1又は2に記載のオリゴヌクレオチド誘導体。
- R1が(C1〜C12)アルキルであり、Z1がOである、請求項1〜3のいずれか一項に記載のオリゴヌクレオチド誘導体。
- R1が1K〜80Kポリエチレングリコールであり、Z1がNHである、請求項1〜3のいずれか一項に記載のオリゴヌクレオチド誘導体。
- R1が第2のオリゴヌクレオチドであり、Z1がNHである、請求項1〜3のいずれか一項に記載のオリゴヌクレオチド誘導体。
- 前記第2のオリゴヌクレオチドが前記第1のオリゴヌクレオチドに相補的である、請求項6に記載のオリゴヌクレオチド誘導体。
- オリゴヌクレオチドスクアレート誘導体を製造する方法であって、
a. アミノ基又はチオール基を含むオリゴヌクレオチド誘導体を合成するステップと、
b. オリゴヌクレオチドスクアレートモノコンジュゲートを生成するために、3,4−ジアルコキシシクロブテン−1,2−ジオンと前記オリゴヌクレオチド誘導体とを反応させるステップと、
を含む、方法。 - 前記オリゴヌクレオチド誘導体が、前記アミノ基又はチオール基を含むリンカーを含む、請求項8に記載の方法。
- 前記オリゴヌクレオチドスクアレートモノコンジュゲートを、ポリエチレングリコール、ペプチド、タンパク質、多糖及び第2のオリゴヌクレオチドから選択される標的対象と反応させるステップを更に含む、請求項8に記載の方法。
- 前記オリゴヌクレオチドモノスクアレートを、アレイ表面、ヒドロゲル、ナノ粒子、可溶性ポリマー及び不溶性ポリマーから選択されるアミン/チオ標識表面と反応させるステップを更に含む、請求項8に記載の方法。
- 前記オリゴヌクレオチド誘導体が該オリゴヌクレオチド誘導体の第2の位置に第2のアミノ基又はチオール基を含み、環状構造を生じるオリゴヌクレオチド内架橋を形成するステップを更に含む、請求項8に記載の方法。
- スクアレートを介したオリゴヌクレオチドの多数の結合を有する材料を提供するために、前記オリゴヌクレオチドモノスクアレートを多アミン/チオ含有種と組み合わせる、請求項8に記載の方法。
- 下記式(A)の構造を有する化合物:
- R1がポリエチレングリコールである、請求項14に記載の化合物。
- R1がペプチドである、請求項14に記載の化合物。
- R1が第2のオリゴヌクレオチドである、請求項14に記載の化合物。
- 前記第2のオリゴヌクレオチドが前記第1のオリゴヌクレオチドに相補的である、請求項17に記載の化合物。
- Z1及びZ2が各々NHである、請求項14に記載の化合物。
- Z1がOであり、Z2がNHである、請求項14に記載の化合物。
- R1が20k〜40kポリエチレングリコールであり、Z1がNHである、請求項15に記載の化合物。
- 前記第2のオリゴヌクレオチドが約2〜約200のヌクレオチドを含み、Z1がNHである、請求項17に記載の化合物。
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