WO2012014890A1 - c-Met結合核酸分子およびその用途 - Google Patents
c-Met結合核酸分子およびその用途 Download PDFInfo
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Definitions
- the present invention relates to a nucleic acid molecule that binds to c-Met protein and use thereof.
- C-Met protein (hepatocyte growth factor receptor: HGFR, hereinafter referred to as “c-Met”) is a receptor tyrosine kinase, and is known as a receptor for hepatocyte growth factor (HGF).
- HGF hepatocyte growth factor
- c-Met is a heterodimeric membrane protein composed of an ⁇ chain and a ⁇ chain, and the ⁇ chain is composed of a tyrosine kinase domain, a transmembrane domain, and an extracellular domain.
- HGF binds to the extracellular domain of c-Met, the tyrosine kinase domain is phosphorylated and the signal transduction system is activated. By activation of this signal transduction system, for example, cell proliferation, invasion, migration and the like are controlled.
- c-Met is overexpressed in cancer cells in many tissues, such as the gastrointestinal tract such as liver, kidney, pancreas, lung, bladder, prostate, seminal vesicle, ovary, breast, breast, stomach and colon (Non-Patent Document 1). For this reason, c-Met has attracted attention as a target and diagnostic marker for various cancers and other diseases. From such a background, it is desired to prevent and treat the above-mentioned diseases by preparing a substance capable of binding to c-Met and neutralizing its action.
- the object of the present invention is to provide c-Met as a substance that can be used for elucidation of the onset mechanism, diagnosis and treatment of diseases caused by c-Met, analysis of the action mechanism of c-Met signaling system, etc. It is to provide a nucleic acid molecule capable of binding to Met, and its use.
- the c-Met-binding nucleic acid molecule of the present invention comprises a polynucleotide of any one of the following (A1) to (A4) and (B1) to (B4), and is c-Met capable of binding to c-Met. Met binding nucleic acid molecule.
- A1 a polynucleotide comprising the base sequence represented by any of SEQ ID NOs: 1 to 38 (A2) in the base sequence represented by any of SEQ ID NOs: 1 to 38, one or more bases are substituted, deleted, A nucleotide sequence comprising an added or inserted nucleotide sequence and having 60% or more identity to the nucleotide sequence represented by any one of polynucleotides (A3) SEQ ID NOs: 1 to 38 that can bind to c-Met
- Polynucleotide (B1) consisting of a base sequence and capable of binding to c-Met, represented by any one of SEQ ID NOs: 39 to 76
- Polynucleotide (B2) comprising a base sequence In the base
- the neutralizing agent of the present invention comprises the c-Met-binding nucleic acid molecule of the present invention, wherein the function of c-Met is neutralized by binding between c-Met and the c-Met-binding nucleic acid molecule. To do.
- the inhibitor of the present invention includes the c-Met-binding nucleic acid molecule of the present invention, and is characterized by inhibiting the function of c-Met by binding between c-Met and the c-Met-binding nucleic acid molecule.
- the pharmaceutical product of the present invention is characterized by including the c-Met-binding nucleic acid molecule of the present invention.
- composition of the present invention is characterized by containing the c-Met-binding nucleic acid molecule of the present invention.
- the detection reagent of the present invention is a c-Met detection reagent for detecting c-Met, characterized in that it comprises the c-Met-binding nucleic acid molecule of the present invention.
- the c-Met-binding nucleic acid molecule of the present invention can bind to c-Met. Therefore, according to the c-Met-binding nucleic acid molecule of the present invention, for example, by binding to c-Met and inhibiting its function, the prevention and treatment of the above-mentioned diseases caused by c-Met can be achieved. It becomes possible. In addition, according to the c-Met-binding nucleic acid molecule of the present invention, for example, by confirming the presence or absence of binding to c-Met, c-Met can be detected, and early diagnosis of a disease becomes possible.
- the c-Met-binding nucleic acid molecule of the present invention in cultured cells, gene transcription inhibition experiments can be performed.
- the c-Met-binding nucleic acid molecule of the present invention can be used for elucidating the function of c-Met, for example, by allowing binding inhibition experiments between c-Met and its receptor. Therefore, the c-Met-binding nucleic acid molecule of the present invention is useful as a new research tool.
- FIG. 1 is a schematic diagram showing a predicted secondary structure of RNA aptamer g1 in the present invention.
- FIG. 2 is a schematic diagram showing an outline of recombinant c-Met.
- FIG. 3 is a graph showing the binding ability of each RNA aptamer to recombinant c-Met in Example 1 of the present invention.
- FIG. 4 is a graph showing the binding ability of each RNA aptamer to recombinant NGFR in Example 2 of the present invention.
- FIG. 5 is a graph showing the binding ability of an RNA aptamer pool to recombinant c-Met in Example 2 of the present invention.
- FIG. 1 is a schematic diagram showing a predicted secondary structure of RNA aptamer g1 in the present invention.
- FIG. 2 is a schematic diagram showing an outline of recombinant c-Met.
- FIG. 3 is a graph showing the binding ability of each RNA aptamer to recombinant c
- FIG. 6 is a graph showing the binding ability of each RNA aptamer to recombinant c-Met in Example 3 of the present invention.
- FIG. 7 is a graph showing the binding ability of each RNA aptamer to recombinant c-Met in Example 4 of the present invention.
- FIG. 8 is a schematic diagram showing the predicted secondary structure of RNA aptamer g1-trA in the present invention.
- FIG. 9 is a graph showing the binding ability of each RNA aptamer to recombinant c-Met in Example 5 of the present invention.
- FIG. 10 is a schematic diagram showing the predicted secondary structure of RNA aptamer g7 in the present invention.
- FIG. 11 is a graph showing the binding ability of each RNA aptamer to recombinant c-Met in Example 6 of the present invention.
- FIG. 12 is a graph showing the binding ability of each RNA aptamer to recombinant c-Met in Example 7 of the present invention.
- FIG. 13 is a graph showing the percentage of migrating cells in the presence of RNA aptamer in Example 8 of the present invention.
- the c-Met-binding nucleic acid molecule of the present invention comprises a polynucleotide of any one of the following (A1) to (A4) and (B1) to (B4), A c-Met binding nucleic acid molecule capable of binding.
- A1 a polynucleotide comprising the base sequence represented by any of SEQ ID NOs: 1 to 38 (A2) in the base sequence represented by any of SEQ ID NOs: 1 to 38, one or more bases are substituted, deleted, A nucleotide sequence comprising an added or inserted nucleotide sequence and having 60% or more identity to the nucleotide sequence represented by any one of polynucleotides (A3) SEQ ID NOs: 1 to 38 that can bind to c-Met
- Polynucleotide (B1) consisting of a base sequence and capable of binding to c-Met, represented by any one of SEQ ID NOs: 39 to 76
- Polynucleotide (B2) comprising a base sequence In the base
- “capable of binding to c-Met” means, for example, having a binding ability to c-Met or having a binding activity to c-Met (c-Met binding activity).
- the c-Met-binding nucleic acid molecule of the present invention specifically binds to c-Met, for example.
- the binding between the c-Met-binding nucleic acid molecule and c-Met can be determined by, for example, surface plasmon resonance molecular interaction analysis. For the analysis, for example, Biacore X (trade name, GE Healthcare Ltd.) can be used.
- amino acid sequence of isoform b (SEQ ID NO: 80) is disclosed in NCBI accession number 427416555.
- the c-Met-binding nucleic acid molecule of the present invention is also referred to as, for example, a c-Met aptamer.
- the nucleic acid molecule of the present invention may be, for example, a molecule comprising any one of the polynucleotides (A1) to (A4) and (B1) to (B4), or the above (A1) to (A4) and (B1).
- a molecule containing any one of the polynucleotides (B4) may be used.
- the nucleic acid molecule containing the polynucleotide (A1) will be described.
- the nucleic acid molecule containing the polynucleotide (A1) is referred to as a c-Met-binding nucleic acid molecule (A1).
- the base sequence represented by any of SEQ ID NOs: 1 to 38 is also referred to as a base sequence (A1).
- A1 a polynucleotide comprising the base sequence represented by any of SEQ ID NOs: 1 to 38
- the polynucleotide consisting of the base sequence (A1) and the c-Met-binding nucleic acid molecule (A1) containing the polynucleotide of the base sequence (A1) are each represented by the name shown before the sequence number as shown below. Sometimes expressed.
- g1 (SEQ ID NO: 1) acacacugagaguuugaccagcuauuaaaugggucgugac g2 (SEQ ID NO: 2) acccuggcgaucuccggccggauacgggagaacgagguac g3 (SEQ ID NO: 3) gggcgaaacugucgugacacgguuugacaugccggccuua g4 (SEQ ID NO: 4) uaccgugauucggggugguauccgguggacauccaggucg g5 (SEQ ID NO: 5) gcccaacgaacauuuugaguuuccaggcagcucauagaca g6 (SEQ ID NO: 6) uccagguguggcgagccacuguaagagucgccgugaggau g7 (SEQ ID NO: 7) cuugaagucaaggguagagugaccaugcagcucguagaca g8 (S
- the c-Met binding nucleic acid molecule (A1) may be, for example, a nucleic acid molecule containing a polynucleotide consisting of the base sequence (A1) or a nucleic acid molecule consisting of the polynucleotide.
- the c-Met binding nucleic acid molecule (A1) includes a polynucleotide comprising the base sequence (A1), for example, the base sequence (A1) is defined as an X region, and a Y region and / or a Y ′ region is further defined. You may have.
- the X region, the Y region, and the Y ′ region are linked in the order of the Y region, the X region, and the Y ′ region, for example, from the 5 ′ side. It is preferable.
- the Y region is not particularly limited, and examples thereof include a sequence consisting of the base sequence of SEQ ID NO: 77 or 78 and a sequence containing the base sequence.
- the Y ′ region is not particularly limited, and examples thereof include a sequence consisting of the base sequence of SEQ ID NO: 79 and a sequence containing the base sequence. These sequences are examples and do not limit the present invention.
- the Y region is preferably bonded to, for example, the 5 ′ side of the base sequence (A1).
- the Y ′ region is preferably bound to the 3 ′ side of the base sequence (A1), for example.
- the base sequence (A1) and the Y region, and the base sequence (A1) and the Y ′ region may be bonded directly or via an intervening sequence.
- the Y region and the Y ′ region are not particularly limited.
- the Y region and the Y ′ region preferably each have, for example, a primer binding sequence that can be annealed by a primer, a polymerase recognition sequence that can be recognized by a polymerase, and the like.
- a primer binding sequence that can be annealed by a primer
- a polymerase recognition sequence that can be recognized by a polymerase, and the like.
- more efficient production is possible by amplifying by a nucleic acid amplification method than by chemical synthesis as described above.
- the c-Met-binding nucleic acid molecule when amplified by a nucleic acid amplification method, the c-Met-binding nucleic acid molecule has, for example, a primer-binding sequence that can be hybridized with a primer and a polymerase recognition sequence that can be recognized by a polymerase. Is preferred.
- the c-Met binding nucleic acid molecule is, for example, 5 'upstream of the X region, ie, the Y region, and 3' downstream of the X region, ie, at least one of the Y 'region, the primer binding sequence. And preferably has a polymerase recognition sequence.
- the polymerase recognition region can be appropriately determined according to, for example, the type of polymerase used in nucleic acid amplification.
- the polymerase recognition sequence is preferably, for example, a DNA-dependent RNA polymerase recognition sequence (hereinafter also referred to as “RNA polymerase recognition sequence”), and specific examples include T7 RNA. Examples include the T7 promoter which is a recognition sequence for polymerase.
- the c-Met binding nucleic acid molecule is RNA, for example, the Y region on the 5 ′ side includes the RNA polymerase recognition sequence and the primer binding sequence (hereinafter also referred to as “5 ′ side primer region”). It is preferable to have them in order.
- the X region is preferably connected to the 3 'side of the Y region. Further, the Y ′ region is preferably linked to the 3 ′ side of the X region, and the Y ′ region preferably has a primer binding sequence (hereinafter also referred to as “3 ′ side primer region”).
- the 5 ′ primer region in the RNA is capable of binding to a sequence complementary to the 3 ′ side of a DNA antisense strand synthesized using, for example, the RNA, that is, the 3 ′ side of the antisense strand.
- the sequence is preferably the same as that of the primer.
- the c-Met-binding nucleic acid molecule may further have a region that assists in binding to c-Met, for example.
- the Y region and the X region, and the X region and the Y ′ region may be directly adjacent to each other or indirectly via an intervening sequence. May be adjacent to
- the number of bases in the Y region and Y ′ region is not particularly limited and is, for example, 10 to 50 bases, preferably 15 to 40 bases, more preferably 20 to 37 bases, and further preferably 20 bases. ⁇ 30 bases.
- the c-Met-binding nucleic acid molecule (A1) contains the base sequence (A1), for example, it comprises a nucleic acid molecule comprising a polynucleotide comprising any one of the nucleotide sequences of SEQ ID NOs: 39 to 76, or the polynucleotide. Examples include nucleic acid molecules.
- the base sequences of SEQ ID NOs: 39 to 76 shown below each include the base sequence (A1) of SEQ ID NOs: 1 to 38, and the regions represented by underlined portions are the base sequences of SEQ ID NOs: 1 to 38, respectively. Equivalent to.
- polynucleotide comprising the nucleotide sequence of SEQ ID NOs: 39 to 76 and the c-Met-binding nucleic acid molecule (A1) containing the polynucleotide of the nucleotide sequence are the names shown before the sequence numbers, as shown below. Sometimes expressed as
- g1 (SEQ ID NO: 39) gggacgcucacguacgcuaa acacacugagaguuugaccagcuauuaaaugggucgugac ucagugccuggacgugcagu g2 (SEQ ID NO: 40) gggacgcucacguacgcuaa acccuggcgaucuccggccggauacgggagaacgagguac ucagugccuggacgugcagu g3 (SEQ ID NO: 41) gggacgcucacguacgcuaa gggcgaaacugucgugacacgguuugacaugccggccuua ucagugccuggacgugcagu g4 (SEQ ID NO: 42) gggacgcucacguacgcuaa uaccgugauucggggugguauccgguggacauccaggucg ucagugc
- the predicted secondary structure of g1 (SEQ ID NO: 39) is shown in FIG. 1, and the predicted secondary structure of g7 (SEQ ID NO: 45) is shown in FIG.
- the enclosed region is an example of a conserved region between the aforementioned c-Met binding nucleic acid molecules.
- the total number of bases of the c-Met binding nucleic acid molecule (A1) is not particularly limited, and is, for example, 20 to 160 bases, preferably 30 to 120 bases, more preferably 40 to 100 bases.
- nucleic acid molecule containing the polynucleotide (A2) will be described.
- the nucleic acid molecule containing the polynucleotide (A2) is referred to as a c-Met-binding nucleic acid molecule (A2).
- substitution, deletion, addition or insertion is hereinafter referred to as “modification”, and the following modified base sequence is also referred to as base sequence (A2).
- A2 a polynucleotide comprising a base sequence represented by any one of SEQ ID NOs: 1 to 38 and having one or more bases substituted, deleted, added or inserted, and capable of binding to c-Met
- the c-Met-binding nucleic acid molecule (A2) may be, for example, a nucleic acid molecule containing the modified base sequence (A2) or a nucleic acid molecule consisting of the modified base sequence (A2).
- “one or more” is not particularly limited as long as the polynucleotide (A2) can bind to c-Met.
- the “one or more” in the base sequence (A1) is, for example, 1 to 5, preferably 1 to 4, more preferably 1 to 3, further preferably 1 or Two, particularly preferably one.
- the “one or more” is, for example, 1 to 5, preferably 1 to 4, more preferably 1 to 3, in the full-length sequence of the c-Met binding nucleic acid molecule (A1). Yes, more preferably one or two, and particularly preferably one.
- the total number of bases of the c-Met-binding nucleic acid molecule (A2) is not particularly limited, and is, for example, 20 to 160 bases, preferably 30 to 120 bases, more preferably 40 to 100 bases.
- the c-Met binding nucleic acid molecule (A2) may further have the Y region and / or the Y ′ region, for example, like the c-Met binding nucleic acid molecule (A1).
- the base sequence (A2) is the X region, and the Y region and the Y ′ region are as described above.
- the polynucleotide (A2) is not particularly limited, and specific examples thereof include a polynucleotide having a base sequence from the 4th base on the 5 ′ side to the terminal base on the 3 ′ side in the base sequence (A1). It is done. That is, examples of the polynucleotide (A2) include a polynucleotide obtained by deleting ggg at the 5 'end in the base sequence (A1).
- nucleic acid molecule containing the polynucleotide (A3) will be described.
- the nucleic acid molecule containing the polynucleotide (A3) is referred to as a c-Met-binding nucleic acid molecule (A3).
- a base sequence having the following identity is also referred to as a base sequence (A3).
- A3) a polynucleotide comprising a base sequence having 60% or more identity to the base sequence represented by any of SEQ ID NOs: 1 to 38 and capable of binding to c-Met
- the c-Met binding nucleic acid molecule (A3) may be, for example, a nucleic acid molecule containing a polynucleotide consisting of the base sequence (A3) having the identity, or a nucleic acid molecule consisting of the polynucleotide.
- the identity is, for example, 70% or more, preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, particularly preferably with respect to the base sequence (A1). 99% or more.
- the identity may be such that, for example, the full-length sequence of the c-Met-binding nucleic acid molecule (A3) may be 70% or more with respect to the full-length sequence of the c-Met-binding nucleic acid molecule (A1), preferably 80 % Or more, more preferably 90% or more, still more preferably 95% or more, and particularly preferably 99% or more.
- the identity can be calculated, for example, by calculating under default conditions using BLAST or the like.
- the total number of bases of the c-Met binding nucleic acid molecule (A3) is not particularly limited, and is, for example, 20 to 160 bases, preferably 30 to 120 bases, and more preferably 40 to 100 bases.
- the c-Met binding nucleic acid molecule (A3) may further have the Y region and / or the Y ′ region, for example, similarly to the c-Met binding nucleic acid molecule (A1).
- the base sequence (A3) is the X region, and the Y region and the Y ′ region are as described above.
- nucleic acid molecule containing the polynucleotide (A4) will be described.
- the nucleic acid molecule containing the polynucleotide (A4) is referred to as a c-Met-binding nucleic acid molecule (A4).
- the following complementary base sequence is also referred to as a base sequence (A4).
- a polynucleotide comprising the nucleotide sequence represented by any one of SEQ ID NOs: 1 to 38 and a nucleotide sequence complementary to a polynucleotide that hybridizes under stringent conditions, and can bind to c-Met.
- the c-Met-binding nucleic acid molecule (A4) may be, for example, the nucleic acid molecule (A4) containing a polynucleotide consisting of the base sequence (A4) or a nucleic acid molecule consisting of the polynucleotide.
- the polynucleotide (A4) may be, for example, a polynucleotide capable of binding to c-Met that hybridizes with the polynucleotide comprising the base sequence (A1) under stringent conditions.
- “hybridizes under stringent conditions” is, for example, well-known experimental conditions for hybridization by those skilled in the art.
- “stringent conditions” refers to, for example, hybridization at 60 to 68 ° C. in the presence of 0.7 to 1 mol / L NaCl, and then 0.1 to 2 times the SSC solution. Used refers to conditions that can be identified by washing at 65-68 ° C. 1 ⁇ SSC consists of 150 mmol / L NaCl and 15 mmol / L sodium citrate.
- the c-Met-binding nucleic acid molecule (A4) includes, for example, a base sequence that hybridizes with the full-length sequence of the c-Met-binding nucleic acid molecule (A1) under stringent conditions, and can bind to c-Met. Or a nucleic acid molecule.
- the total number of bases of the c-Met binding nucleic acid molecule (A4) is not particularly limited, and is, for example, 20 to 160 bases, preferably 30 to 120 bases, more preferably 40 to 100 bases.
- the c-Met binding nucleic acid molecule (A4) may further have the Y region and / or the Y ′ region, for example, similarly to the c-Met binding nucleic acid molecule (A1).
- the base sequence (A4) is the X region, and the Y region and the Y ′ region are as described above.
- the nucleic acid molecule containing the polynucleotide (B1) is referred to as a c-Met-binding nucleic acid molecule (B1).
- the base sequence represented by any of SEQ ID NOs: 39 to 76 is also referred to as a base sequence (B1).
- B1 a polynucleotide comprising the base sequence represented by any of SEQ ID NOs: 39 to 76
- the base sequence represented by any of SEQ ID NOs: 39 to 76 is as described above.
- a polynucleotide comprising the base sequence (B1) represented by any of SEQ ID NOs: 39 to 76, and a c-Met-binding nucleic acid molecule (B1) containing the base sequence (B1) are each preceded by the above-described SEQ ID NO: It may be expressed by the name shown.
- the c-Met binding nucleic acid molecule (B1) may be, for example, a nucleic acid molecule containing a polynucleotide consisting of the base sequence (B1) or a nucleic acid molecule consisting of the polynucleotide.
- the total number of bases of the c-Met binding nucleic acid molecule (B1) is not particularly limited.
- the upper limit of the total length is, for example, 160 bases, preferably 120 bases, and more preferably 100 bases.
- the c-Met binding nucleic acid molecule (B1) may further have the Y region and / or the Y ′ region, for example, similarly to the c-Met binding nucleic acid molecule (A1).
- the base sequence (B1) is the X region, and the Y region and the Y ′ region are as described above.
- the c-Met-binding nucleic acid molecule (B1) is preferably, for example, a nucleic acid molecule containing the polynucleotide (b1) below.
- the nucleic acid molecule containing the polynucleotide (b1) is also referred to as a c-Met-binding nucleic acid molecule (b1).
- the c-Met binding nucleic acid molecule (b1) may be, for example, a nucleic acid molecule containing a polynucleotide consisting of the base sequence of SEQ ID NO: 39, or a nucleic acid molecule consisting of the polynucleotide. (B1) a polynucleotide comprising the base sequence represented by SEQ ID NO: 39
- nucleic acid molecule containing the polynucleotide (B2) is referred to as a c-Met-binding nucleic acid molecule (B2).
- c-Met binding nucleic acid molecule (B2) substitution, deletion, addition or insertion is hereinafter referred to as “modification”, and the following modified base sequence is also referred to as base sequence (B2).
- B2 a polynucleotide comprising a base sequence represented by any one of SEQ ID NOs: 39 to 76 and having one or more bases substituted, deleted, added or inserted, and capable of binding to c-Met
- the c-Met binding nucleic acid molecule (B2) may be, for example, a nucleic acid molecule containing the modified base sequence (B2) or a nucleic acid molecule consisting of the modified base sequence (B2).
- “one or more” is not particularly limited as long as the polynucleotide of (B2) can be bound to c-Met.
- the number of substituted bases is, for example, 1 to 5, preferably 1 to 4, more preferably 1 to 3, and still more preferably 1. Or it is two, Especially preferably, it is one.
- the number of added or inserted bases is, for example, 1 to 5, preferably 1 to 4, more preferably 1 to 3, more preferably 1 in the base sequence (B1).
- the number of deleted bases is, for example, 1 to 40, 1 to 20, 1 to 4, 1 to 3, 2 or 1 in the base sequence (B1).
- the length of the c-Met binding nucleic acid molecule (B2) is not particularly limited, and the total length is, for example, 20 to 160 bases, preferably 30 to 120 bases, more preferably 40 to 100. Base length.
- one or a plurality of bases includes a polynucleotide having a deleted base sequence, and can bind to c-Met.
- a certain nucleic acid molecule can be said to be a nucleic acid molecule obtained by miniaturizing the c-Met-binding nucleic acid molecule (B1).
- the miniaturized nucleic acid molecule is also referred to as a miniaturized c-Met-binding nucleic acid molecule (B2).
- the deleted base sequence is also referred to as a miniaturized base sequence (B2).
- the miniaturized base sequence (B2) for example, not only one or more bases are deleted in the base sequence (B1), but, for example, one or more bases are further substituted, added, or inserted.
- the base sequence may be sufficient.
- the miniaturized c-Met binding nucleic acid molecule may be, for example, a nucleic acid molecule containing a polynucleotide consisting of the miniaturized base sequence (B2) or a nucleic acid molecule consisting of the polynucleotide.
- the miniaturized c-Met binding nucleic acid molecule (B2) may be a nucleic acid molecule containing a polynucleotide comprising the deleted miniaturized base sequence (B2), or a nucleic acid comprising the polynucleotide. It may be a molecule.
- the polynucleotide of the miniaturized base sequence (B2) is not particularly limited, and as a specific example, the base sequence (B1) consists of a base sequence from the 4th base on the 5 ′ side to the terminal base on the 3 ′ side. And polynucleotides. That is, examples of the polynucleotide of the base sequence (B2) include a polynucleotide in which the 5 ′ terminal ggg is deleted from the base sequence (B1).
- the length of the miniaturized c-Met-binding nucleic acid molecule (B2) is not particularly limited, and the total length thereof is, for example, 20 to 160 bases, preferably 30 to 120 bases, more preferably 40 ⁇ 100 bases long.
- the c-Met binding nucleic acid molecule (B2) may further have the Y region and / or the Y ′ region, for example, similarly to the c-Met binding nucleic acid molecule (B1).
- the base sequence (B2) is the X region, and the Y region and the Y ′ region are as described above.
- the miniaturized c-Met-binding nucleic acid molecule (B2) is preferably a nucleic acid molecule containing the polynucleotide (b2) below, for example.
- the nucleic acid molecule containing the polynucleotide (b2) is also referred to as a miniaturized c-Met-binding nucleic acid molecule (b2).
- the c-Met binding nucleic acid molecule (b2) may be, for example, a nucleic acid molecule containing a polynucleotide consisting of the nucleotide sequence of SEQ ID NO: 39, or a nucleic acid molecule consisting of the polynucleotide.
- (B2) a polynucleotide comprising one or more bases deleted in the base sequence represented by SEQ ID NO: 39 and capable of binding to c-Met
- the base sequence from which one or more bases are deleted is hereinafter also referred to as a deleted base sequence.
- Examples of the deleted base sequence include base sequences represented by any of SEQ ID NOs: 81 to 89. These base sequences are shown in Table 1 below. In Table 1 below, each base sequence is shown to correspond to the base sequence of SEQ ID NO: 39. For each base sequence, the portion to be deleted is shown as blank in comparison with the base sequence of SEQ ID NO: 39.
- polynucleotide comprising the nucleotide sequences of SEQ ID NOs: 81 to 89 and the miniaturized c-Met binding nucleic acid molecule (b2) containing the polynucleotide may be represented by names shown in Table 1 below, respectively.
- the miniaturized c-Met binding nucleic acid molecule (b2) may be, for example, a nucleic acid molecule comprising a polynucleotide having any one of the nucleotide sequences of SEQ ID NOs: 81 to 89, or a nucleic acid molecule comprising the polynucleotide.
- the downsized base sequence (B2) is not particularly limited, and as a specific example, in the base sequence of SEQ ID NO: 39 and any one of the base sequences (b2) of SEQ ID NOs: 81 to 89, the 4 ′ base on the 5 ′ side To 3 ′ terminal nucleotides. That is, the miniaturized base sequence (B2) is, for example, a polynucleotide obtained by deleting ggg at the 5 ′ end in the base sequence of SEQ ID NO: 39 and any of the base sequences (b2) of SEQ ID NOs: 81 to 89. It is done.
- the length of the miniaturized c-Met binding nucleic acid molecule (b2) is not particularly limited, and the total length is, for example, 20 to 160 bases, preferably 30 to 120 bases, more preferably 40 ⁇ 100 bases long.
- the c-Met binding nucleic acid molecule (b2) may further have the Y region and / or the Y ′ region, for example, like the c-Met binding nucleic acid molecule (B1).
- the base sequence (b2) is the X region, and the Y region and the Y ′ region are as described above.
- the nucleic acid molecule containing the polynucleotide (B3) is referred to as a c-Met-binding nucleic acid molecule (B3).
- a base sequence having the following identity is also referred to as a base sequence (B3).
- B3) a polynucleotide comprising a base sequence having 60% or more identity to the base sequence represented by any of SEQ ID NOs: 38 to 76 and capable of binding to c-Met
- the c-Met binding nucleic acid molecule (B3) may be a nucleic acid molecule comprising a polynucleotide comprising the base sequence (B3) having the identity, or may be a nucleic acid molecule comprising the polynucleotide.
- the identity is, for example, 70% or more, preferably 80% or more, more preferably 90% or more, still more preferably 95% or more, particularly preferably with respect to the base sequence (B1). 99% or more.
- the identity may be, for example, 70% or more of the full-length sequence of the c-Met-binding nucleic acid molecule (B3) relative to the full-length sequence of the c-Met-binding nucleic acid molecule (B1), preferably 80 % Or more, more preferably 90% or more, still more preferably 95% or more, and particularly preferably 99% or more.
- the identity can be calculated, for example, by calculating under default conditions using BLAST or the like.
- the total number of bases of the c-Met binding nucleic acid molecule (B3) is not particularly limited, and is, for example, 20 to 160 bases, preferably 30 to 120 bases, more preferably 40 to 100 bases.
- the c-Met binding nucleic acid molecule (B3) may further have the Y region and / or the Y ′ region, for example, similarly to the c-Met binding nucleic acid molecule (B1).
- the base sequence (B3) is the X region, and the Y region and the Y ′ region are as described above.
- nucleic acid molecule containing the polynucleotide (B4) will be described.
- the nucleic acid molecule containing the polynucleotide (B4) is referred to as a c-Met-binding nucleic acid molecule (B4).
- the following complementary base sequence is also referred to as a base sequence (B4).
- (B4) a polynucleotide comprising the nucleotide sequence represented by any of SEQ ID NOs: 38 to 76 and a nucleotide sequence complementary to a polynucleotide that hybridizes under stringent conditions, and capable of binding to c-Met
- the c-Met binding nucleic acid molecule (B4) may be, for example, the nucleic acid molecule (B4) containing a polynucleotide consisting of the base sequence (B4) or a nucleic acid molecule consisting of the polynucleotide.
- the polynucleotide (B4) may be, for example, a polynucleotide capable of binding to c-Met that hybridizes with the polynucleotide comprising the base sequence (B1) under stringent conditions.
- the c-Met-binding nucleic acid molecule (B4) includes, for example, a base sequence that hybridizes with the full-length sequence of the c-Met-binding nucleic acid molecule (B1) under stringent conditions and can bind to c-Met. Or a nucleic acid molecule.
- the total number of bases of the c-Met binding nucleic acid molecule (B4) is not particularly limited, and is, for example, 20 to 160 bases, preferably 30 to 120 bases, and more preferably 40 to 100 bases.
- the c-Met binding nucleic acid molecule (B4) may further have the Y region and / or the Y ′ region, for example, similarly to the c-Met binding nucleic acid molecule (B1).
- the base sequence (B4) is the X region, and the Y region and the Y ′ region are as described above.
- the nucleic acid molecule of the present invention may contain, for example, one of the polynucleotides (A1) to (A4) and (B1) to (B4), or a plurality of the polynucleotides. In the latter case, it is preferable that a plurality of polynucleotides are linked to form a single-stranded polynucleotide.
- the sequences of the plurality of polynucleotides may be directly linked to each other or indirectly linked via a linker.
- the polynucleotide sequences are preferably linked directly or indirectly at the respective ends.
- the sequences of the plurality of polynucleotides may be the same or different, for example, but are preferably the same.
- the number of the sequences is not particularly limited, and is, for example, 2 or more, preferably 2.
- the length of the linker is not particularly limited, and is, for example, 1 to 80 bases long, preferably 5 to 60 bases long, more preferably 5 to 40 bases long, and further preferably 5 to 30 bases long It is long.
- the c-Met binding nucleic acid molecule of the present invention is preferably a single-stranded nucleic acid, for example.
- the single-stranded nucleic acid is preferably capable of forming a stem structure and a loop structure by, for example, self-annealing.
- the polynucleotide is preferably capable of forming a stem structure, a loop structure, an internal loop structure, and / or a bulge structure, for example.
- one of the single strands is any one of (A1) to (A4) and (B1) to (B4).
- a nucleic acid molecule comprising the base sequence complementary to the nucleic acid molecule of any one of (A1) to (A4) and (B1) to (B4) A nucleic acid molecule containing In the case of the double-stranded nucleic acid, for example, prior to use, it may be dissociated into single strands by denaturation or the like. Further, the dissociated single-stranded nucleic acid preferably has a stem structure, a loop structure, or the like as described above.
- the structural unit of the c-Met-binding nucleic acid molecule of the present invention is not particularly limited.
- the structural unit is, for example, a nucleotide residue.
- the nucleotide residue include a ribonucleotide residue and a deoxyribonucleotide residue.
- the c-Met-binding nucleic acid molecule of the present invention include RNA composed only of ribonucleotide residues, RNA containing deoxyribonucleotide residues, and the like.
- the number of deoxyribonucleotide residues in the RNA is not particularly limited and is, for example, “one or several”, specifically, for example, 1 to 20, preferably 1 to 10, and more.
- the number is preferably 1 to 5, more preferably 1 to 3, and particularly preferably 1 or 2.
- the c-Met-binding nucleic acid molecule of the present invention may contain, for example, a modified nucleotide residue.
- the number of the modified nucleotide residues in the nucleic acid molecule is not particularly limited, and is, for example, “one or several”. Specifically, for example, in the polynucleotide, for example, 1 to 50, preferably Is 1 to 40, more preferably 1 to 20, further preferably 1 to 10, particularly preferably 1 to 3, and most preferably 1 or 2.
- modified nucleotide residue examples include a modified ribonucleotide residue and a modified deoxyribonucleotide residue.
- modified nucleotide residue examples include those in which a sugar residue in the nucleotide residue is modified.
- sugar residue examples include a ribose residue and a deoxyribose residue.
- the modification site in the nucleotide residue is not particularly limited, and examples thereof include the 2 'position and / or the 4' position of the sugar residue. Examples of the modification include methylation, fluorination, amination, and thiolation.
- the modified nucleotide residue is, for example, a modified nucleotide residue having a pyrimidine base (pyrimidine nucleus) as a base, or a modified nucleotide residue having a purine base (purine nucleus) as a base.
- the former is preferred.
- a nucleotide residue having a pyrimidine base is referred to as a pyrimidine nucleotide residue
- a modified pyrimidine nucleotide residue is referred to as a modified pyrimidine nucleotide residue
- a nucleotide residue having a purine base is referred to as a purine nucleotide residue.
- the purified purine nucleotide residue is referred to as a modified purine nucleotide residue.
- the pyrimidine nucleotide residues include uracil nucleotide residues having uracil, cytosine nucleotide residues having cytosine, thymine nucleotide residues having thymine, and the like.
- the base is a pyrimidine base
- the 2'-position carbon and / or the 4'-position carbon of the sugar residue is preferably modified.
- modified nucleotide residue examples include, for example, 2′-methyluracil (2′-methylated-uracil nucleotide residue), 2′-methylcytosine (2 '-Methylated-cytosine nucleotide residues), 2'-fluorouracil (2'-fluorinated-uracil nucleotide residues), 2'-fluorocytosine (2'-fluorinated-cytosine nucleotide residues), 2'-amino Uracil (2′-aminated-uracil nucleotide residue), 2′-aminocytosine (2′-aminated-cytosine nucleotide residue), 2′-thiouracil (2′-thiolated-uracil nucleotide residue), 2 '-Thiocytosine (2'-thiolated-cytosine nucleotide residue) and the like.
- the base in the nucleotide residue may be a natural base (non-artificial nucleic acid) of adenine (a), cytosine (c), guanine (g), thymine (t) and uracil (u), or an artificial base (non-artificial base).
- Natural base examples include a modified base and a modified base, and preferably have the same function as the natural base (a, c, g, t, or u).
- the artificial base having the same function is, for example, an artificial base capable of binding to cytosine (c) instead of guanine (g), an artificial base capable of binding to guanine (g) instead of cytosine (c), Instead of adenine (a), an artificial base capable of binding to thymine (t) or uracil (u), instead of thymine (t), an artificial base capable of binding to adenine (a), instead of uracil (u) And an artificial base capable of binding to adenine (a).
- the modified base include a methylated base, a fluorinated base, an aminated base, and a thiolated base.
- the modified base include, for example, 2′-methyluracil, 2′-methylcytosine, 2′-fluorouracil, 2′-fluorocytosine, 2′-aminouracil, 2′-aminocytosine, 2′-thiouracil. And 2'-thiocytosine.
- the bases represented by a, g, c, t and u include the meaning of the artificial base having the same function as each of the natural bases in addition to the natural base.
- the c-Met-binding nucleic acid molecule of the present invention may contain, for example, an artificial nucleic acid monomer residue as the structural unit.
- the number of the artificial nucleic acid monomer residues in the nucleic acid molecule is not particularly limited and is, for example, “one or several”, specifically, for example, 1 to 20, preferably 1 to 10, and more. The number is preferably 1 to 5, more preferably 1 to 3, and particularly preferably 1 or 2.
- Examples of the artificial nucleic acid monomer residue include PNA (peptide nucleic acid), LNA (Locked Nucleic Acid), ENA (2'-O, 4'-C-Ethylenebridged Nucleic Acids) and the like.
- the base in the monomer residue is the same as described above, for example.
- Examples of the c-Met-binding nucleic acid molecule of the present invention include RNA or DNA containing at least one monomer residue of PNA, LNA and ENA, and preferably RNA.
- the c-Met binding nucleic acid molecule of the present invention is preferably nuclease resistant, for example.
- the nuclease is not particularly limited, and examples thereof include exonuclease and endonuclease. Specific examples include, for example, ribonuclease (RNase) that is an RNA-degrading enzyme, deoxyribonuclease (DNase) that is a DNA-degrading enzyme, RNA and Examples include nucleases that act on both DNA.
- RNase ribonuclease
- DNase deoxyribonuclease
- RNA examples include nucleases that act on both DNA.
- the method for making the nuclease resistant is not particularly limited.
- the c-Met-binding nucleic acid molecule of the present invention preferably has, for example, the modified nucleotide residue as a structural unit because of its nuclease resistance.
- the modified nucleotide residue are as described above, and include the methylated nucleotide residue, the fluorinated nucleotide residue, the aminated nucleotide residue, the thiolated nucleotide residue, etc. Fluorinated nucleotide residues are preferred.
- the modified nucleotide residue is, for example, the pyrimidine nucleotide residue, and the sugar residue (ribose residue or deoxyribose residue) is preferably modified.
- the number of the modified nucleotide residues is not particularly limited, and is as described above, for example.
- the c-Met-binding nucleic acid molecule of the present invention may have, for example, the artificial nucleic acid monomer residue as a structural unit because of the nuclease resistance.
- the artificial nucleic acid monomer residue is not particularly limited and is as described above, and among them, an LNA residue is preferable.
- the number of the modified nucleotide residues is not particularly limited, and is as described above, for example.
- the c-Met-binding nucleic acid molecule of the present invention is preferably RNA, for example, preferably RNase resistant, that is, RNase resistant.
- the c-Met-binding nucleic acid molecule of the present invention preferably has, for example, the deoxyribonucleotide residue because of resistance to RNase.
- the c-Met-binding nucleic acid molecule is RNA, for example, among all nucleotide residues constituting RNA, all or part of nucleotide residues having uracil are converted to nucleotide residues having thymine. Specifically, it may be substituted with a deoxyribonucleotide residue having the thymine.
- the c-Met-binding nucleic acid molecule is RNA, for example, all or some of the nucleotide residues constituting the RNA may be deoxyribonucleotide residues.
- the c-Met-binding nucleic acid molecule of the present invention may be bound to, for example, PEG (polyethylene glycol) or deoxythymidine at the 5 'end or 3' end due to resistance to RNase.
- PEG polyethylene glycol
- deoxythymidine at the 5 'end or 3' end due to resistance to RNase.
- the PEG is preferably tens of kDa, for example.
- the c-Met-binding nucleic acid molecule of the present invention may further have an additional sequence (also referred to as a linker) as long as it does not affect the binding property to c-Met in use.
- the additional sequence is preferably bound to, for example, at least one of the 5 'end and the 3' end of the nucleic acid molecule, and more preferably the 3 'end.
- Examples of the additional sequence include a poly (A) sequence and a poly (T) sequence.
- the structural unit of the additional sequence is, for example, a nucleotide residue, and examples thereof include a ribonucleotide residue and a deoxyribonucleotide residue, and a ribonucleotide residue is preferable.
- the nucleic acid molecule of the present invention is immobilized on a carrier, the nucleic acid molecule is preferably immobilized on the carrier via the additional sequence.
- the binding activity of the c-Met-binding nucleic acid molecule of the present invention to c-Met can be expressed, for example, by the dissociation constant between the c-Met-binding nucleic acid molecule and c-Met.
- the dissociation constant of the c-Met-binding nucleic acid molecule of the present invention is not particularly limited, and is, for example, 5 ⁇ 10 ⁇ 8 mol / L or less, preferably 8 ⁇ 10 ⁇ 9 mol / L or less.
- the c-Met is, for example, human-derived c-Met.
- the c-Met-binding nucleic acid molecule of the present invention can be bound to, for example, a single c-Met or a fusion peptide containing c-Met via c-Met.
- the fusion peptide include a fusion peptide containing c-Met on the N-terminal side, a fusion peptide containing c-Met on the C-terminal side, a fusion peptide containing c-Met inside.
- the fusion polypeptide may include, for example, c-Met and another peptide.
- the other peptide may be a protein, for example.
- the fusion peptide includes, for example, the meaning of a fusion protein.
- the method for producing the c-Met-binding nucleic acid molecule of the present invention is not limited at all, and can be synthesized by a known method such as a nucleic acid synthesis method using chemical synthesis.
- the c-Met-binding nucleic acid molecule of the present invention can also be prepared, for example, by nucleic acid amplification.
- the preparation method by the nucleic acid amplification is not particularly limited.
- the c-Met binding nucleic acid molecule of the present invention is RNA, for example, it can be prepared using DNA as a template.
- the DNA strand that serves as a template for the RNA is also referred to as an antisense strand
- the DNA strand that includes a sequence in which uracil (u) of the RNA is replaced with thymine (t) is also referred to as a sense strand.
- the template DNA includes, for example, DNA (antisense strand) in which uracil (u) of the complementary region of the X region in the RNA is replaced with thymine (t), and uracil (u) of the X region is converted to thymine (t). It is preferable to include any one of DNAs (sense strands) containing the sequence substituted in (). Nucleic acid amplification is performed using these DNAs as templates and a DNA-dependent DNA polymerase, and then RNA is transcribed using the obtained DNA amplification product as a template and further using a DNA-dependent RNA polymerase. Thereby, the RNA can be amplified.
- RNA is prepared by reverse transcription using an RNA-dependent DNA polymerase, DNA is amplified by PCR using the cDNA as a template, and the resulting DNA amplification product is used as a template. Furthermore, RNA is transcribed using a DNA-dependent RNA polymerase. Thereby, the RNA may be amplified.
- the c-Met binding nucleic acid molecule of the present invention is DNA
- the DNA can be amplified by a polymerase chain reaction (PCR) method or the like.
- the c-Met-binding nucleic acid molecule of the present invention can bind to c-Met, it can be used, for example, as a neutralizing agent that neutralizes the function of c-Met by binding to c-Met.
- the c-Met-binding nucleic acid molecule of the present invention can bind to c-Met as described above, it can be used, for example, as an inhibitor that inhibits the function of c-Met by binding to c-Met.
- the c-Met-binding nucleic acid molecule of the present invention can bind to c-Met, it can be used, for example, as a pharmaceutical for preventing or treating a disease caused by the expression of c-Met.
- the disease include cancer, liver damage, amyotrophic lateral sclerosis, infectious inflammation, etc.
- the liver damage includes, for example, chronic hepatitis, fatty liver, cirrhosis, etc. Bacterial infection, malaria infection and the like.
- the medicament of the present invention can be used as, for example, an anticancer agent, an anti-hepatic disorder agent, an antimuscular atrophic lateral sclerosis agent, an anti-inflammatory agent and the like.
- the neutralizing agent of the present invention, the inhibitor of the present invention, and the pharmaceutical agent of the present invention are only required to contain the c-Met-binding nucleic acid molecule of the present invention, and other configurations are not limited at all.
- the neutralizing agent of the present invention, the inhibitor of the present invention, and the pharmaceutical agent of the present invention may each contain, for example, a carrier in addition to the c-Met-binding nucleic acid molecule of the present invention.
- a carrier in addition to the c-Met-binding nucleic acid molecule of the present invention.
- the composition shown below The same configuration can be given and can be used in the same manner.
- the c-Met-binding nucleic acid molecule of the present invention can suppress, for example, cell migration (migration) and / or invasion, and can suppress, for example, cell migration and / or invasion promoted by HGF.
- the c-Met-binding nucleic acid molecule of the present invention can also be used, for example, as a cell migration inhibitor, a cell migration inhibitor or a cell infiltration inhibitor.
- the c-Met-binding nucleic acid molecule of the present invention can also be used as a cancer metastasis inhibitor because it can suppress, for example, cell migration.
- composition of the present invention comprises the c-Met-binding nucleic acid molecule of the present invention.
- the composition of the present invention only needs to contain the c-Met-binding nucleic acid molecule of the present invention, and other configurations are not limited at all.
- composition of the present invention can bind to c-Met as described above, it can be used, for example, as a neutralizing agent that neutralizes the function of c-Met by binding to c-Met.
- composition of the present invention can bind to c-Met as described above, it can be used, for example, as an inhibitor that inhibits the function of c-Met by binding to c-Met.
- composition of the present invention can bind to c-Met as described above, it can be used, for example, as a pharmaceutical for preventing or treating a disease caused by c-Met.
- the pharmaceutical of the present invention can be used as, for example, an anticancer agent.
- the application target of the composition of the present invention is not particularly limited, and can be appropriately determined according to the use.
- Examples of the application target include cells, tissues, and living bodies.
- the origin of the cells and tissues and the type of living body are not particularly limited.
- Examples of the living body include organisms having a c-Met gene and / or a c-Met ortholog gene, and specific examples thereof include animals such as humans, non-human mammals other than humans, birds, and fish.
- the administration method is not particularly limited, and examples thereof include oral administration and parenteral administration.
- the parenteral administration include intravenous administration, arterial administration, administration to lymphatic vessels, intramuscular administration, subcutaneous administration, rectal administration, transdermal administration, intraperitoneal administration, and local administration.
- composition of the present invention may contain, for example, various additives in addition to the c-Met-binding nucleic acid molecule of the present invention.
- the additive is not particularly limited, and can be appropriately determined depending on the use of the composition of the present invention, for example.
- the additive is preferably a pharmaceutically acceptable additive.
- the composition of the present invention for example, when the c-Met-binding nucleic acid molecule is delivered to a cell, tissue, in vivo, or the like, it is preferable that the composition further contains a carrier.
- the carrier is not particularly limited, and examples thereof include nanoparticles, liposomes, micelles, reverse micelles, polycations, cell membrane permeable peptides, magnetic particles, and calcium phosphate.
- the nanoparticles are not particularly limited, and examples thereof include nanocarbons such as carbon nanohorns and carbon nanotubes. Any one kind of these carriers may be used, or two or more kinds may be used in combination.
- the additive include a buffer, a metal salt, and a surfactant.
- the detection reagent of the present invention is a c-Met detection reagent for detecting c-Met, comprising the c-Met-binding nucleic acid molecule of the present invention.
- the present invention is not limited as long as it contains the c-Met-binding nucleic acid molecule of the present invention.
- the c-Met-binding nucleic acid molecule of the present invention can bind to c-Met as described above. Therefore, for example, by using the detection reagent of the present invention to confirm the presence or absence of binding between the c-Met-binding nucleic acid molecule of the present invention and c-Met, c-Met in a sample can be detected. .
- the detection can be, for example, either qualitative or quantitative.
- the method for confirming the presence or absence of binding between the c-Met-binding nucleic acid molecule and c-Met is not particularly limited, and a known method for detecting the binding between the nucleic acid and the protein can be used. As described above, when the detection reagent of the present invention is used, c-Met can be easily detected, which is useful in the fields of biochemistry and clinical medicine, for example.
- the kit of the present invention includes the c-Met-binding nucleic acid molecule of the present invention. According to the kit of the present invention, for example, c-Met can be detected as described above.
- the kit of the present invention may contain, for example, various additives, instructions for use, etc., if necessary.
- the therapeutic method of the present invention is characterized by comprising the step of administering the c-Met-binding nucleic acid molecule of the present invention to a subject having a disease involving c-Met.
- the disease involving c-Met is not particularly limited, and examples thereof include at least one disease selected from the group consisting of cancer, liver injury, amyotrophic lateral sclerosis, and infectious inflammation.
- the cancer include cancers of the digestive tract such as liver, kidney, pancreas, lung, bladder, prostate, seminal vesicle, ovary, breast, breast, stomach and colon.
- the hepatic disorder examples include chronic hepatitis, fatty liver, cirrhosis and the like, and examples of the infectious inflammation include bacterial infection and malaria infection.
- the treatment method of the present invention for example, prevention of the disease, suppression of progression of the disease, treatment of the disease, and the like are possible.
- the therapeutic method of the present invention includes, for example, the meaning of a preventive method, and may include a step of administering the c-Met-binding nucleic acid molecule of the present invention to a subject at risk of the disease.
- the administration method, administration conditions, etc. of the c-Met binding nucleic acid molecule of the present invention are not particularly limited and are as described above.
- the administration subject for example, patient is not particularly limited.
- Examples of the living body include organisms having the c-Met gene and / or the c-Met ortholog gene, and specific examples include humans and non-human animals other than humans. For example, non-human mammals other than humans, birds, fish and the like can be mentioned.
- the composition of the present invention may be administered.
- the present invention is characterized in that it is a nucleic acid molecule for use in the treatment of a disease involving c-Met.
- the nucleic acid molecule is the c-Met binding nucleic acid molecule of the present invention.
- the c-Met binding nucleic acid molecule of the present invention is as described above.
- the present invention is also characterized in that it is a composition for use in the treatment of a disease involving c-Met.
- the composition is the composition of the present invention comprising the c-Met-binding nucleic acid molecule of the present invention.
- the composition of the present invention is as described above.
- the method for inhibiting cell migration of the present invention includes the step of administering to the cell the c-Met-binding nucleic acid molecule of the present invention. Unless otherwise indicated, the above description can be used, for example. The administration may be performed, for example, either in vivo or in vitro .
- the type of the cell is not limited at all, and examples thereof include the aforementioned cancer cells, cultured cells thereof, and isolated cells from patients.
- the method for suppressing cell migration of the present invention can also be referred to as, for example, a method for suppressing cell migration or a method for suppressing cell infiltration.
- the cell migration suppression method of the present invention can be said to be, for example, a cancer metastasis suppression method.
- RNA aptamers capable of binding to c-Met were prepared as c-Met-binding nucleic acid molecules, and the binding ability of each RNA aptamer to c-Met was confirmed.
- RNA aptamer consisting of the base sequence represented by any of SEQ ID NOs: 39 to 48 in Table 2 below was prepared by a known nucleic acid synthesis method and used as the RNA aptamer of Example 1.
- RNA of Comparative Example 1 an RNA library (40N) containing a plurality of RNAs consisting of an oligonucleotide represented by SEQ ID NO: 90 having a random sequence of 40 bases in length was used (hereinafter the same).
- SEQ ID NO: 90 “n” is adenine, guanine, cytosine, thymine or uracil.
- Target protein A recombinant protein containing His-tag, IgG and c-Met was used as the target protein.
- a commercially available product name Recombinant Human HGF R / c-MET / Fc Chimera, CF (R & D Systems) was used (hereinafter referred to as “rec-cMet”).
- FIG. 2 schematically shows the structure of the rec-cMet.
- the rec-cMet has an N-terminal on the left side and a C-terminal on the right side.
- CCMet ⁇ is the peptide sequence (SEQ ID NO: 91) from the 25th Glu to the 307th Arg in the ⁇ chain of c-Met (NCBI accession number P08581), and “cMet ⁇ ” is c-Met (NCBI accession number P085881). It is a peptide sequence (SEQ ID NO: 92) from the 308th Ser to the 932rd Thr in the ⁇ chain of session number P08581).
- HIEGRMD is a peptide sequence (SEQ ID NO: 93) consisting of 7 amino acid residues of His-Ile-Glu-Gly-Arg-Met-Asp, and “IgG” is from the 100th Pro to the 330th Lys in human IgG.
- the “6His” is a His-tag (SEQ ID NO: 95) in which 6 Hiss are linked.
- the rec-cMet the cMet ⁇ and the cMet ⁇ are linked by a disulfide bond, and the HIEGRMD, the IgG, and the His-tag are linked in this order to the C-terminus of the cMet ⁇ . Yes.
- the plate was washed 3 times with a washing solution.
- the composition of the washing solution was 20 mmol / L Tris, 100 mmol / L sodium chloride, 0.1 mmol / L magnesium acetate and 0.2% Triton (registered trademark) -X100.
- 50 ⁇ L of the washing solution was added instead of 50 ⁇ L of the rec-cMet, and incubation and washing were performed in the same manner.
- RNA aptamer 20 base polyadenine (polyA) was added to the 3 'end of the RNA aptamer to prepare a polyA-added RNA aptamer.
- the polyA-added RNA aptamer was denatured and then mixed with 20 base biotinylated polythymine (740 nmol / L) biotinylated at the 5 ′ end, tRNA (100 ⁇ g / mL) and RNase inhibitor (0.16 units / mL).
- a biotin-labeled RNA aptamer was prepared by complementary binding of poly A of the poly A-added RNA aptamer and polythymine (poly T) of the biotinylated polythymine.
- the biotin-labeled RNA aptamer was added to the plate and incubated at 4 ° C. for 30 minutes. Subsequently, the plate was washed, and 0.1 ⁇ g / mL HRP-streptavidin (Thermo Fisher Scientific Inc., USA) was added. Further, after washing the plate, 1-Step Ultra TMB substrate (Thermo Fisher Scientific Inc., USA) was added for color development, and the absorbance at 450 nm was measured.
- FIG. 3 is a graph showing the binding ability of RNA aptamers g1 to g9 to the rec-cMet.
- the vertical axis represents the absorbance at 450 nm indicating the ability to bind to the rec-cMet, and shows an average value ⁇ deviation (SD) based on three measurements.
- SD average value ⁇ deviation
- each bar indicates the results of N40 and RNA aptamers g1 to g9 in order from the left.
- RNA aptamers g1 to g9 showed higher absorbance than the N40. This result shows that the RNA aptamers g1 to g9 bind to the rec-cMet. Among them, the RNA aptamers g1, g5, g6, g7 and g8 showed high binding ability, and in particular, the RNA aptamer g7 showed extremely excellent binding ability.
- Example 2 For each RNA aptamer of Example 1, it was confirmed that the binding to the rec-cMet was a specific binding to the c-Met region in the rec-cMet.
- NGFR peptide sequence of NGFR protein
- DIEGRMD SEQ ID NO: 97
- a peptide sequence of human IgG SEQ ID NO: 94
- a His-tag A recombinant protein (6His) linked to (SEQ ID NO: 95) was used.
- recombinant protein a commercially available product name Recombinant Human NGF R / TNFRSF16 / Fc Chimera (CF: R & D Systems) was used (hereinafter referred to as rec-NGFR).
- the peptide sequence of the NGFR protein is the 29th Lys to 250th Asn peptide sequence (SEQ ID NO: 96) of the NGFR protein (NCBI accession number P08138), and the peptide sequence consisting of 7 amino acid residues is , Asp-Ile-Glu-Gly-Arg-Met-Asp peptide sequence consisting of 7 amino acid residues (SEQ ID NO: 97), the peptide sequence of human IgG is the peptide from 100th Pro to 330th Lys in human IgG The His-tag is a peptide sequence in which six Hiss are linked.
- the binding ability of the RNA aptamer to the rec-NGFR was confirmed in the same manner as in Example 1 except that the rec-NGFR was bound to the plate. Further, as a comparative example, the N40 was used, and the binding ability was confirmed in the same manner.
- FIG. 4 is a graph showing the binding ability of RNA aptamers g1 to g9 to the rec-NGFR.
- the vertical axis represents the absorbance at 450 nm indicating the binding ability to the rec-NGFR, and shows the mean value ⁇ deviation (SD) based on three measurements.
- SD mean value ⁇ deviation
- each bar indicates the results of N40 and RNA aptamers g1 to g9 in order from the left.
- each of the RNA aptamers g1 to g9 had an absorbance lower than that of the N40 and was not bound to the rec-NGFR. From these results, it was confirmed in Example 1 that each RNA aptamer specifically bound to the c-Met region in the rec-cMet.
- FIG. 5 also shows the binding ability to the rec-cMet and the binding ability to the rec-NGFR for aptamer pools containing the RNA aptamers g1 to g9.
- FIG. 5 is a graph showing the binding ability of the aptamer pool to the rec-cMet and the binding ability to the rec-NGFR.
- the vertical axis represents the absorbance at 450 nm indicating the binding ability to each of the recombinant proteins, and shows the mean value ⁇ deviation (SD) based on three measurements.
- SD mean value ⁇ deviation
- the RNA aptamer pool showed higher absorbance than the N40 for the rec-cMet and extremely low absorbance for the rec-NGFR. From this result, it was confirmed that the RNA aptamer pool specifically binds to c-Met, not NGFR.
- Example 3 An aptamer in which the RNA aptamer g1 (SEQ ID NO: 39) was miniaturized was prepared, and its binding ability to c-Met was confirmed.
- FIG. 1 shows a schematic diagram of the predicted secondary structure of the RNA aptamer g1.
- the miniaturized RNA aptamer includes g1-u5del that lacks the 4th to 8th bases (5 bases in length) on the 5 ′ side in the sequence of the RNA aptamer g1, and the 4th to 13th bases (10 bases).
- G1-u10del lacking (long), and the 1st to 5th bases (5 base length) at the 3 ′ end are deleted.
- a g1-d10del that lacks ⁇ was prepared.
- Table 3 The sequences of these miniaturized aptamers are shown in Table 3 below.
- the binding ability of the RNA aptamer to the rec-cMet was confirmed in the same manner as in Example 1 except that the miniaturized RNA aptamer was used.
- the binding ability of the RNA aptamer g1 was also confirmed in the same manner.
- the N40 was used, and the binding ability was confirmed in the same manner.
- FIG. 6 is a graph showing the binding ability of the miniaturized aptamers g1-u10del, g1-u5del, g1-d5del, g1-d10del to the rec-cMet.
- the vertical axis represents the absorbance at 450 nm indicating the ability to bind to the rec-cMet, and shows an average value ⁇ deviation (SD) based on three measurements.
- SD average value ⁇ deviation
- each bar indicates the results of N40, RNA aptamer g1, miniaturized RNA aptamer g1-u10del, g1-u5del, g1-d10del, g1-d5del in order from the left.
- the miniaturized RNA aptamers g1-u10del, g1-u5del, g1-d10del, and g1-d5del each showed higher absorbance than the RNA aptamer g1. From these results, it was found that the ability to bind to c-Met was further improved by downsizing the RNA aptamer g1.
- Example 4 A miniaturized aptamer was prepared from the RNA aptamer g1 (SEQ ID NO: 39), and the binding ability to c-Met was confirmed.
- FIG. 1 shows a schematic diagram of the predicted secondary structure of the RNA aptamer g1.
- the miniaturized RNA aptamer is composed of g1-u20del lacking the 4th to 23rd bases (20 base length) on the 5 ′ side and the 4th to 23rd bases on the 5 ′ side in the sequence of the RNA aptamer g1. (20 base length) and g1-trA from which the 1st to 14th bases (14 base length) on the 3 ′ side were deleted were prepared.
- the sequences of these miniaturized aptamers are shown in Table 4 below.
- the binding ability of the RNA aptamer to the rec-cMet was confirmed in the same manner as in Example 1 except that the miniaturized RNA aptamer was used.
- the binding ability of the RNA aptamer g1 was also confirmed in the same manner.
- the N40 was used, and the binding ability was confirmed in the same manner.
- FIG. 7 is a graph showing the binding ability of the miniaturized aptamers g1-trA and g1-u20del to the rec-cMet.
- the vertical axis represents the absorbance at 450 nm indicating the ability to bind to the rec-cMet, and shows an average value ⁇ deviation (SD) based on three measurements.
- SD ⁇ deviation
- each bar indicates the results of N40, RNA aptamer g1, miniaturized RNA aptamer g1-trA, g1-u20del in order from the left.
- the miniaturized RNAg1-trA and g1-u20del each showed higher absorbance than the RNA aptamer g1. From these results, it was found that the ability to bind to c-Met was further improved by downsizing the RNA aptamer g1.
- RNA aptamer in which the RNA aptamer g1-trA (SEQ ID NO: 86) was further miniaturized was prepared, and the binding ability of each RNA aptamer to c-Met was confirmed.
- FIG. 8 shows a schematic diagram of the predicted secondary structure of the RNA aptamer g1-trA.
- the miniaturized RNA aptamer is composed of g1-miniA lacking the 4th base on the 5 ′ side and the 1st base on the 3 ′ end in the sequence of the RNA aptamer g1-trA and 5 bases from the 4th base on the 5 ′ side.
- G1-miniB from which the 1st base to the 2nd base (2 bases length) on the 3rd side (2 bases length) and 3 'side are deleted, the 4th base to the 6th base (3 bases length) on the 5' side and 3 'side G1-miniC lacking the first to third bases (3 base length) on the side was prepared.
- the RNA aptamer g1-trA from the RNA aptamer g1-trA, the RNA aptamer g1-miniA lacks one base pair in the stem region, and the RNA aptamer g1-miniB lacks two base pairs in the stem region.
- the RNA aptamer g1-miniC was deleted in the stem region of 3 base pairs.
- RNA aptamers g1 and g1-trA were used according to the instruction manual thereof, and the rec-cMet concentration was 175 nmol / L.
- the binding ability of the RNA aptamers g1 and g1-trA was also confirmed in the same manner.
- the N40 was used, and the binding ability was confirmed in the same manner.
- FIG. 9 is a graph showing the binding ability of the miniaturized aptamer to the rec-cMet.
- the vertical axis represents the signal intensity (RU) measured by the BIACORE (registered trademark) X
- the horizontal axis represents the analysis time (seconds).
- each of the miniaturized RNAs showed binding ability to the rec-cMet.
- g1-miniA showed excellent binding ability.
- the dissociation constants (KD) of g1-trA, g1-miniA, and g1-miniB are 8.18 ⁇ 10 ⁇ 9 mol / L, 7.98 ⁇ 10 ⁇ 9 mol / L, and 2.64 ⁇ 10 ⁇ , respectively. It was found to be 8 mol / L and excellent in binding ability.
- RNA aptamers shown below were prepared, and the binding ability of each RNA aptamer to c-Met was confirmed.
- RNA aptamer g1 (# 6: SEQ ID NO: 39), g28 (# 56: SEQ ID NO: 66), g6 (# 18: SEQ ID NO: 44), g21 (# 25: SEQ ID NO: 59), g34 (# 73: SEQ ID NO: 72), g37 (# 71: SEQ ID NO: 75), g5 (# 20: SEQ ID NO: 43), g7 (# 32: SEQ ID NO: 45), g25 (# 51: SEQ ID NO: 63) g2 (# 28: SEQ ID NO: 40), g33 (# 64: SEQ ID NO: 71), g27 (# 43: SEQ ID NO: 65), g20 (# 35: SEQ ID NO: 58), g11 (# 21: SEQ ID NO: 49), g35 (# 63: SEQ ID NO: 73), g23 (# 44: SEQ ID NO: 61), g15 (# 39: SEQ ID NO: 53),
- the binding ability of the RNA aptamer to the rec-cMet was confirmed in the same manner as in Example 5 except that the RNA aptamer was used.
- the rec-cMet concentration was 100 nmol / L
- the start of introduction of the rec-cMet into the chip was set to 0 second
- the buffer was introduced after 60 seconds.
- RNA showing no specific binding to rec-cMet was used as a negative control, and the binding ability was confirmed in the same manner.
- FIG. 11 is a graph showing the binding ability of the RNA aptamer to the rec-cMet.
- the vertical axis indicates the signal intensity (RU) measured by the BIACORE (registered trademark) X.
- the signal value is a value for 60 seconds after introducing the buffer.
- all RNA aptamers showed binding strength.
- any RNA aptamer maintains an equivalent signal value after 60 seconds and does not show a decrease in binding ability.
- Example 7 The modified RNA aptamers shown below were prepared, and the binding ability to c-Met was confirmed for each RNA aptamer.
- RNA aptamer A fluorinated RNA aptamer having the same base sequence as the RNA aptamer shown in Example 6 was synthesized using the 2′-fluoro-CTP and the 2′-fluoro-UTP. In the fluorinated RNA aptamer, cytosine nucleotide residues and uracil nucleotide residues are fluorinated in the base sequence.
- the binding ability of the RNA aptamer to the rec-cMet was confirmed in the same manner as in Example 5 except that the fluorinated RNA aptamer was used.
- the rec-cMet concentration was 60 nmol / L
- the start of introduction of the rec-cMet into the chip was 0 second
- the buffer was introduced after 60 seconds.
- the same negative control as in Example 6 was used.
- FIG. 12 is a graph showing the binding ability of the RNA aptamer to the rec-cMet.
- the vertical axis indicates the signal intensity (RU) measured by the BIACORE (registered trademark) X.
- the signal value is a value for 60 seconds after introducing the buffer.
- all RNA aptamers showed binding strength.
- fluorinated g29 (# 49), g38 (# 50) and g25 (# 51), particularly g38 (# 50) showed excellent binding ability.
- fluorinated RNA aptamers should be particularly suitable for in vivo and in vitro use because fluorination confers RNase resistance and maintains binding to c-Met. Recognize.
- any RNA aptamer maintains an equivalent signal value after 60 seconds and does not show a decrease in binding ability.
- Example 8 The effect of the modified RNA aptamer on cell migration was confirmed.
- RNA aptamer Using the 2′-fluoro-CTP and the 2′-fluoro-UTP, a fluorinated RNA aptamer comprising the base sequence of g38 (# 50) was prepared in the same manner as in Example 7. Synthesized. In the fluorinated RNA aptamer, cytosine nucleotide residues and uracil nucleotide residues are fluorinated in the base sequence.
- a serum-free medium HGF + modified g38 containing 0.1% BSA containing 50 ng / mL HGF and 1 ⁇ g / mL modified RNA aptamer was used.
- a medium containing only HGF HGF
- HGF + control HGF + control
- a medium containing no HGF and modified RNA aptamer ( ⁇ )It was used.
- control RNA the same negative control RNA as in Example 6 was used.
- FIG. 13 is a graph showing the movement of the T98G strain in the presence of the modified RNA, and the vertical axis shows the ratio of the number of cells that have moved through the membrane to the back side. The ratio was calculated assuming that the number of cells migrated in the medium ( ⁇ ) to which HGF and modified RNA aptamer were not added was 1.
- the c-Met-binding nucleic acid molecule of the present invention can bind to c-Met. Therefore, according to the c-Met-binding nucleic acid molecule of the present invention, for example, by binding to c-Met and inhibiting its function, the prevention and treatment of the above-mentioned diseases caused by c-Met can be achieved. It becomes possible. In addition, according to the c-Met-binding nucleic acid molecule of the present invention, for example, by confirming the presence or absence of binding to c-Met, c-Met can be detected, and early diagnosis of a disease becomes possible.
- the c-Met-binding nucleic acid molecule of the present invention in cultured cells, gene transcription inhibition experiments can be performed.
- the c-Met-binding nucleic acid molecule of the present invention can be used for elucidating the function of c-Met, for example, by allowing binding inhibition experiments between c-Met and its receptor. Therefore, the c-Met-binding nucleic acid molecule of the present invention is useful as a new research tool.
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Abstract
Description
(A1)配列番号1~38のいずれかで表わされる塩基配列からなるポリヌクレオチド
(A2)配列番号1~38のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A3)配列番号1~38のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A4)配列番号1~38のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B1)配列番号39~76のいずれかで表わされる塩基配列からなるポリヌクレオチド
(B2)配列番号39~76のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B3)配列番号39~76のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B4)配列番号39~76のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
本発明のc-Met結合核酸分子は、前述のように、下記(A1)~(A4)および(B1)~(B4)のいずれかのポリヌクレオチドを含むことを特徴とする、c-Metに結合可能なc-Met結合核酸分子である。
(A1)配列番号1~38のいずれかで表わされる塩基配列からなるポリヌクレオチド
(A2)配列番号1~38のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A3)配列番号1~38のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A4)配列番号1~38のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B1)配列番号39~76のいずれかで表わされる塩基配列からなるポリヌクレオチド
(B2)配列番号39~76のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B3)配列番号39~76のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B4)配列番号39~76のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A1)配列番号1~38のいずれかで表わされる塩基配列を含むポリヌクレオチド
g1(配列番号1)
acacacugagaguuugaccagcuauuaaaugggucgugac
g2(配列番号2)
acccuggcgaucuccggccggauacgggagaacgagguac
g3(配列番号3)
gggcgaaacugucgugacacgguuugacaugccggccuua
g4(配列番号4)
uaccgugauucggggugguauccgguggacauccaggucg
g5(配列番号5)
gcccaacgaacauuuugaguuuccaggcagcucauagaca
g6(配列番号6)
uccagguguggcgagccacuguaagagucgccgugaggau
g7(配列番号7)
cuugaagucaaggguagagugaccaugcagcucguagaca
g8(配列番号8)
gggcacuuaaaaccagaccgugauuugcgguuggucucgc
g9(配列番号9)
gaugucucaauuggucgugauugugcugaccacacgaacc
g10(配列番号10)
acacagcucugauggucgugauuagguugaccaccuaccu
g11(配列番号11)
guuuagguggcaucgaccuucaugaaacgggugcacaggc
g12(配列番号12)
cgcggccauccggcguuuggaacgggauguacaccugaca
g13(配列番号13)
ucacucggacagccggagcgaaacgggcuguguaagacug
g14(配列番号14)
ucaucgggacaucggauggaacgggugucaagaagcgugu
g15(配列番号15)
gacgcgggccaccggcuagcgacgggugguaaagggcuug
g16(配列番号16)
ccgcuaccgggugcaacggguagacuguaaccaggugaua
g17(配列番号17)
agugauggccggcuggagaaacgggccacucgauccagg
g18(配列番号18)
ggcacccuauaggauucagccccuaacccgguguugugaa
g19(配列番号19)
guagccgugauuggguuggcugcccacaauuauccaggac
g20(配列番号20)
acguuguggcgaacuucggcccgaacgggaguaacugca
g21(配列番号21)
ccuuggugucauccgaccaaauuagaacgggaugaggaag
g22(配列番号22)
gcguguuucuucauuucgacgcuggccaacggaaaugcaa
g23(配列番号23)
augggagugcgccucggcucuaacggagguaugcacguca
g24(配列番号24)
gaguugucgcacagcgacucgaaaauaaucuguccgacac
g25(配列番号25)
uagcaacaguucccagaggugaucaggcagccuuaagaca
g26(配列番号26)
gcuccaccagguguagcuagccuguagacaucaguagca
g27(配列番号27)
ccuaugcagaccgacauccggguauacgggaugaugcgac
g28(配列番号28)
ccuggggguuccgcaggaaucgggaacuagauuggugguc
g29(配列番号29)
acgagccgugauuggguuggcaacccugcuuaugugagga
g30(配列番号30)
aaauugccgggaucugguguggcgaccaugcggcgugcau
g31(配列番号31)
agagucuaugccgugagugaggguggcgccucgacugcca
g32(配列番号32)
acaagaccgggauggggguuggucacacacaaagacugaa
g33(配列番号33)
acuuuuggcgaucuccggccggauacgggagaacgaggua
g34(配列番号34)
uuuggugaauuccgaccauuuugcaaacgggauacgggac
g35(配列番号35)
gauuugugugauacccgacacucuaacgggguagcagggc
g36(配列番号36)
cuugauuggucgcaaccggacaaggacggguugaugcagu
g37(配列番号37)
gguuugcuccgaccgacuaaagggagccucugucacgagu
g38(配列番号38)
ccaggagcauuagaccggggaaagaaggaguaccgucugg
gggacgcucacguacgcuaa(配列番号77)
acgcucacguacgcuaa(配列番号78)
ucagugccuggacgugcagu(配列番号79)
gggacgcucacguacgcuaaacacacugagaguuugaccagcuauuaaaugggucgugacucagugccuggacgugcagu
g2(配列番号40)
gggacgcucacguacgcuaaacccuggcgaucuccggccggauacgggagaacgagguacucagugccuggacgugcagu
g3(配列番号41)
gggacgcucacguacgcuaagggcgaaacugucgugacacgguuugacaugccggccuuaucagugccuggacgugcagu
g4(配列番号42)
gggacgcucacguacgcuaauaccgugauucggggugguauccgguggacauccaggucgucagugccuggacgugcagu
g5(配列番号43)
gggacgcucacguacgcuaagcccaacgaacauuuugaguuuccaggcagcucauagacaucagugccuggacgugcagu
g6(配列番号44)
gggacgcucacguacgcuaauccagguguggcgagccacuguaagagucgccgugaggauucagugccuggacgugcagu
g7(配列番号45)
gggacgcucacguacgcuaacuugaagucaaggguagagugaccaugcagcucguagacaucagugccuggacgugcagu
g8(配列番号46)
gggacgcucacguacgcuaagggcacuuaaaaccagaccgugauuugcgguuggucucgcucagugccuggacgugcagu
g9(配列番号47)
gggacgcucacguacgcuaagaugucucaauuggucgugauugugcugaccacacgaaccucagugccuggacgugcagu
g10(配列番号48)
gggacgcucacguacgcuaaacacagcucugauggucgugauuagguugaccaccuaccuucagugccuggacgugcagu
g11(配列番号49)
gggacgcucacguacgcuaaguuuagguggcaucgaccuucaugaaacgggugcacaggcucagugccuggacgugcagu
g12(配列番号50)
gggacgcucacguacgcuaacgcggccauccggcguuuggaacgggauguacaccugacaucagugccuggacgugcagu
g13(配列番号51)
gggacgcucacguacgcuaaucacucggacagccggagcgaaacgggcuguguaagacugucagugccuggacgugcagu
g14(配列番号52)
gggacgcucacguacgcuaaucaucgggacaucggauggaacgggugucaagaagcguguucagugccuggacgugcagu
g15(配列番号53)
gggacgcucacguacgcuaagacgcgggccaccggcuagcgacgggugguaaagggcuugucagugccuggacgugcagu
g16(配列番号54)
gggacgcucacguacgcuaaccgcuaccgggugcaacggguagacuguaaccaggugauaucagugccuggacgugcagu
g17(配列番号55)
gggacgcucacguacgcuaaagugauggccggcuggagaaacgggccacucgauccaggucagugccuggacgugcagu
g18(配列番号56)
gggacgcucacguacgcuaaggcacccuauaggauucagccccuaacccgguguugugaaucagugccuggacgugcagu
g19(配列番号57)
gggacgcucacguacgcuaaguagccgugauuggguuggcugcccacaauuauccaggacucagugccuggacgugcagu
g20(配列番号58)
gggacgcucacguacgcuaaacguuguggcgaacuucggcccgaacgggaguaacugcaucagugccuggacgugcagu
g21(配列番号59)
gggacgcucacguacgcuaaccuuggugucauccgaccaaauuagaacgggaugaggaagucagugccuggacgugcagu
g22(配列番号60)
gggacgcucacguacgcuaagcguguuucuucauuucgacgcuggccaacggaaaugcaaucagugccuggacgugcagu
g23(配列番号61)
gggacgcucacguacgcuaaaugggagugcgccucggcucuaacggagguaugcacgucaucagugccuggacgugcagu
g24(配列番号62)
gggacgcucacguacgcuaagaguugucgcacagcgacucgaaaauaaucuguccgacacucagugccuggacgugcagu
g25(配列番号63)
gggacgcucacguacgcuaauagcaacaguucccagaggugaucaggcagccuuaagacaucagugccuggacgugcagu
g26(配列番号64)
gggacgcucacguacgcuaagcuccaccagguguagcuagccuguagacaucaguagcaucagugccuggacgugcagu
g27(配列番号65)
gggacgcucacguacgcuaaccuaugcagaccgacauccggguauacgggaugaugcgacucagugccuggacgugcagu
g28(配列番号66)
gggacgcucacguacgcuaaccuggggguuccgcaggaaucgggaacuagauugguggucucagugccuggacgugcagu
g29(配列番号67)
gggacgcucacguacgcuaaacgagccgugauuggguuggcaacccugcuuaugugaggaucagugccuggacgugcagu
g30(配列番号68)
gggacgcucacguacgcuaaaaauugccgggaucugguguggcgaccaugcggcgugcauucagugccuggacgugcagu
g31(配列番号69)
gggacgcucacguacgcuaaagagucuaugccgugagugaggguggcgccucgacugccaucagugccuggacgugcagu
g32(配列番号70)
gggacgcucacguacgcuaaacaagaccgggauggggguuggucacacacaaagacugaaucagugccuggacgugcagu
g33(配列番号71)
gggacgcucacguacgcuaaacuuuuggcgaucuccggccggauacgggagaacgagguaucagugccuggacgugcagu
g34(配列番号72)
gggacgcucacguacgcuaauuuggugaauuccgaccauuuugcaaacgggauacgggacucagugccuggacgugcagu
g35(配列番号73)
gggacgcucacguacgcuaagauuugugugauacccgacacucuaacgggguagcagggcucagugccuggacgugcagu
g36(配列番号74)
gggacgcucacguacgcuaacuugauuggucgcaaccggacaaggacggguugaugcaguucagugccuggacgugcagu
g37(配列番号75)
gggacgcucacguacgcuaagguuugcuccgaccgacuaaagggagccucugucacgaguucagugccuggacgugcagu
g38(配列番号76)
gggacgcucacguacgcuaaccaggagcauuagaccggggaaagaaggaguaccgucuggucagugccuggacgugcagu
(A2)配列番号1~38のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A3)配列番号1~38のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A4)配列番号1~38のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B1)配列番号39~76のいずれかで表わされる塩基配列からなるポリヌクレオチド
(b1)配列番号39で表わされる塩基配列からなるポリヌクレオチド
(B2)配列番号39~76のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(b2)配列番号39で表わされる塩基配列において、1または複数の塩基が、欠失された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B3)前記配列番号38~76のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B4)前記配列番号38~76のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
本発明の組成物は、前述のように、前記本発明のc-Met結合核酸分子を含むことを特徴とする。本発明の組成物は、前記本発明のc-Met結合核酸分子を含んでいればよく、その他の構成は、何ら制限されない。
本発明の検出試薬は、前記本発明のc-Met結合核酸分子を含むことを特徴とする、前記c-Metを検出するためのc-Met検出試薬である。本発明は、前記本発明のc-Met結合核酸分子を含んでいればよく、その他の構成は何ら制限されない。
本発明の治療方法は、前記c-Metが関与する疾患の対象に、本発明のc-Met結合核酸分子を投与する工程を含むことを特徴とする。前記c-Metが関与する疾患は、特に制限されず、例えば、癌、肝障害、筋委縮性側索硬化症、感染性炎症からなる群から選択された少なくとも一つの疾患があげられる。前記癌は、例えば、肝臓、腎臓、膵臓、肺、膀胱、前立腺、精嚢、卵巣、乳房、乳腺、胃および結腸等の消化管等の癌があげられる。前記肝障害は、例えば、慢性肝炎、脂肪肝、肝硬変等があげられ、前記感染性炎症は、例えば、細菌感染症、マラリア感染等があげられる。本発明の治療方法によれば、例えば、前記疾患の予防、前記疾患の進行の抑制または前記疾患の治療等が可能である。本発明の治療方法は、例えば、予防方法の意味も含み、前記疾患の危険性がある対象に、本発明のc-Met結合核酸分子を投与する工程を含んでもよい。本発明のc-Met結合核酸分子の投与方法、投与条件等は、特に制限されず、前述の通りである。また、前記投与対象(例えば、患者)も、特に制限されない。前記生体は、例えば、c-Met遺伝子および/またはc-Metオーソログ遺伝子を有する生物があげられ、具体例としては、例えば、ヒト、ヒトを除く非ヒト動物があげられ、前記非ヒト動物は、例えば、ヒトを除く非ヒト哺乳類、鳥類、魚類等があげられる。前記投与工程において、例えば、本発明の組成物を投与してもよい。
c-Met結合核酸分子として、c-Metに結合可能なRNAアプタマーを作製し、各RNAアプタマーについて、c-Metに対する結合能を確認した。
下記表2における、配列番号39~48のいずれかで表わされる塩基配列からなるRNAアプタマーを、公知の核酸合成方法により作製し、実施例1のRNAアプタマーとして使用した。比較例1のRNAとして、40塩基長のランダム配列を有する下記配列番号90で表わされるオリゴヌクレオチドからなるRNAを複数含むRNAライブラリー(40N)を使用した(以下、同様)。配列番号90において、「n」は、アデニン、グアニン、シトシン、チミンまたはウラシルである。
40N(配列番号90)
gggacgcucacguacgcucannnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnucagugccuggacgugcagu
ターゲットタンパク質として、His-タグ、IgGおよびc-Metを含む組換えタンパク質を使用した。前記組換えタンパク質は、市販品である製品名Recombinant Human HGF R/c-MET/Fc Chimera,CF(R&D Systems社)を使用した(以下、「rec-cMet」という)。図2に、前記rec-cMetの構造の概略を示す。図2において、前記rec-cMetは、左側がN末端、右側がC末端である。「cMet α」は、c-Met(NCBIアクセッション番号P08581)のα鎖における25番目Gluから307番目Argのペプチド配列(配列番号91)であり、「cMet β」は、c-Met(NCBIアクセッション番号P08581)のβ鎖における308番目Serから932番目Thrのペプチド配列(配列番号92)である。「HIEGRMD」は、His-Ile-Glu-Gly-Arg-Met-Aspの7アミノ酸残基からなるペプチド配列(配列番号93)であり、「IgG」は、ヒトIgGにおける100番目Proから330番目Lysのペプチド配列(配列番号94)であり、「6His」は、6個のHisが連結したHis-タグ(配列番号95)である。前記rec-cMetは、前記cMet αと前記cMet βとが、ジスルフィド結合で結合しており、前記cMet βのC末端に、前記HIEGRMD、前記IgGおよび前記His-タグが、この順序で連結している。
抗IgG抗体(製品名Human IgG-Fc Antibody:Bethyl Laboratories社製)を96穴プレート(Iwaki、AGCテクノガラス社、日本)に吸着させ、1%のウシ血清アルブミンでブロッキングを行った。次いで、前記プレートに、1μg/mLの前記rec-cMetを50μL添加し、さらに、かっこ内に示す終濃度となるように、Tris(20mmol/L)、塩化ナトリウム(100mmol/L)、酢酸マグネシウム(0.1mmol/L)およびTriton(登録商標)-X100(0.2%)を加えた。前記プレートを、室温で3時間インキュベートし、前記プレートに前記rec-cMetを結合させた。インキュベート後、前記プレートを洗浄液で3回洗浄した。前記洗浄液の組成は、20mmol/L Tris、100mmol/L塩化ナトリウム、0.1mmol/L酢酸マグネシウムおよび0.2%Triton(登録商標)-X100とした。コントロールは、50μLの前記rec-cMetに代えて、50μLの前記洗浄液を添加し、同様に、インキュベートならびに洗浄を行った。
前記実施例1の各RNAアプタマーについて、前記rec-cMetへの結合が、前記rec-cMetにおけるc-Metの領域に対する特異的な結合であることを確認した。
前記RNAアプタマーg1(配列番号39)を小型化したアプタマーを作製し、c-Metに対する結合能を確認した。
図1に、前記RNAアプタマーg1の推定二次構造の概略図を示す。前記小型化RNAアプタマーは、前記RNAアプタマーg1の配列において、5’側の4塩基目~8塩基目(5塩基長)を欠失するg1-u5del、前記4塩基目から13塩基目(10塩基長)を欠失するg1-u10del、3’末端の1塩基目から5塩基目(5塩基長)を欠失するg1-d5del、3’末端の1塩基目から10塩基目(10塩基長)を欠失するg1-d10delを作製した。これらの小型化アプタマーの配列を下記表3に示す。
前記RNAアプタマーg1(配列番号39)を、小型化したアプタマーを作製し、c-Metに対する結合能を確認した。
図1に、前記RNAアプタマーg1の推定二次構造の概略図を示す。前記小型化RNAアプタマーは、前記RNAアプタマーg1の配列において、5’側の4塩基目から23塩基目(20塩基長)を欠失するg1-u20delおよび5’側の4塩基目から23塩基目(20塩基長)および3’側の1塩基目から14塩基目(14塩基長)を欠失するg1-trAを作製した。これらの小型化アプタマーの配列を下記表4に示す。
RNAアプタマーg1-trA(配列番号86)をさらに小型化したRNAアプタマーを作製し、各RNAアプタマーについて、c-Metに対する結合能を確認した。
図8に、前記RNAアプタマーg1-trAの推定二次構造の概略図を示す。前記小型化RNAアプタマーは、前記RNAアプタマーg1-trAの配列において、5’側の4塩基目および3’末端の1塩基目を欠失するg1-miniA、5’側の4塩基目から5塩基目(2塩基長)および3’側の1塩基目から2塩基目(2塩基長)を欠失するg1-miniB、5’側の4塩基目から6塩基目(3塩基長)および3’側の1塩基目から3塩基目(3塩基長)を欠失するg1-miniCを作製した。図8に示すように、前記RNAアプタマーg1-trAから、前記RNAアプタマーg1-miniAは、ステム領域の1塩基対を欠失させ、前記RNAアプタマーg1-miniBは、ステム領域の2塩基対を欠失させ、前記RNAアプタマーg1-miniCは、ステム領域の3塩基対を欠失させた。これらの塩基配列を下記表5に示す。
以下に示すRNAアプタマーを作製し、各RNAアプタマーについて、c-Metに対する結合能を確認した。
g1(#6:配列番号39)、g28(#56:配列番号66)、g6(#18:配列番号44)、g21(#25:配列番号59)、g34(#73:配列番号72)、g37(#71:配列番号75)、g5(#20:配列番号43)、g7(#32:配列番号45)、g25(#51:配列番号63)
g2(#28:配列番号40)、g33(#64:配列番号71)、g27(#43:配列番号65)、g20(#35:配列番号58)、g11(#21:配列番号49)、g35(#63:配列番号73)、g23(#44:配列番号61)、g15(#39:配列番号53)、g14(#23:配列番号52)、g17(#26:配列番号55)、g13(#14:配列番号51)
g4(#16:配列番号42)、g31(#95:配列番号69)、g29(#49:配列番号67)、g19(#27:配列番号57)、g9(#8:配列番号47)、g10(#1:配列番号48)、g8(#33:配列番号46)、g32(#88:配列番号70)、g30(#70:配列番号68)
g3(#47:配列番号41)、g16(#24:配列番号54)、g26(#65:配列番号64)、g36(#87:配列番号74)、g38(#50:配列番号76)、g18(#17:配列番号56)、g22(#30:配列番号60)、g12(#36:配列番号50)、g24(#89:配列番号62)
以下に示す修飾化RNAアプタマーを作製し、各RNAアプタマーについて、c-Metに対する結合能を確認した。
前記2’-フルオロ-CTPおよび前記2’-フルオロ-UTPを用いて、前記実施例6に示すRNAアプタマーと同じ塩基配列からなるフルオロ化RNAアプタマーを合成した。前記フルオロ化RNAアプタマーは、前記塩基配列において、シトシンヌクレオチド残基およびウラシルヌクレオチド残基がフルオロ化されている。
修飾化RNAアプタマーが細胞移動に与える影響を確認した。
前記2’-フルオロ-CTPおよび前記2’-フルオロ-UTPを用いて、前記実施例7と同様にして、g38(#50)の塩基配列からなるフルオロ化RNAアプタマーを合成した。前記フルオロ化RNAアプタマーは、前記塩基配列において、シトシンヌクレオチド残基およびウラシルヌクレオチド残基がフルオロ化されている。
市販のセルカルチャーインサート(商品名セルカルチャーインサート、BD Falcon社製)を使用して、その使用説明書にしたがって、ヒトのグリオーマ細胞由来T98G株の細胞移動を確認した。具体的には、まず、T98G株を、貧栄養条件である0.1%BSA含有無血清培地を用いて、37℃で48時間培養した。そして、インサートの下部に、培地を入れ、培養後のT98G株を、前記インサートのメンブラン(ポアサイズ8μm)上に捲き、37℃で16時間培養した。培養後、前記メンブレンを通過して前記メンブレンの裏側に移動した細胞数をカウントした。前記培地は、50ng/mL HGFおよび1μg/mL 修飾化RNAアプタマーを含む0.1%BSA含有無血清培地(HGF+修飾化g38)を使用した。また、比較例として、前記HGFのみを含む培地(HGF)、前記HGFおよび1μg/mL コントロールRNAを含む培地(HGF+control)を使用し、コントロールとして、前記HGFおよび修飾化RNAアプタマー未添加の培地(-)を使用した。前記コントロールRNAは、前記実施例6と同じネガティブコントロールRNAを使用した。
Claims (17)
- 下記(A1)~(A4)および(B1)~(B4)のいずれかのポリヌクレオチドを含むことを特徴とする、c-Metに結合可能なc-Met結合核酸分子。
(A1)配列番号1~38のいずれかで表わされる塩基配列からなるポリヌクレオチド
(A2)配列番号1~38のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A3)配列番号1~38のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(A4)配列番号1~38のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B1)配列番号39~76のいずれかで表わされる塩基配列からなるポリヌクレオチド
(B2)配列番号39~76のいずれかで表わされる塩基配列において、1または複数の塩基が、置換、欠失、付加または挿入された塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B3)配列番号39~76のいずれかで表わされる塩基配列に対して、60%以上の同一性を有する塩基配列からなり、c-Metに結合可能であるポリヌクレオチド
(B4)配列番号39~76のいずれかで表わされる塩基配列からなるポリヌクレオチドと、ストリンジェントな条件下でハイブリダイズするポリヌクレオチドに相補的な塩基配列からなり、c-Metに結合可能であるポリヌクレオチド - 前記(B2)のポリヌクレオチドが、配列番号39~76のいずれかで表わされる塩基配列において、3’末端の3塩基を欠失した塩基配列を含むポリヌクレオチドである、請求項1記載のc-Met結合核酸分子。
- 前記(B2)のポリヌクレオチドが、配列番号81~89のいずれかで表わされる塩基配列を含むポリヌクレオチドである、請求項1または2記載のc-Met結合核酸分子。
- 前記(B2)のポリヌクレオチドが、配列番号81~89のいずれかで表わされる塩基配列において、3’末端の3塩基を欠失した塩基配列を含むポリヌクレオチドである、請求項1から3のいずれか一項に記載のc-Met結合核酸分子。
- 前記核酸分子が、修飾化ヌクレオチド残基を含む、請求項1から4のいずれか一項に記載のc-Met結合核酸分子。
- 前記修飾化ヌクレオチド残基が、メチル化ヌクレオチド残基、フルオロ化ヌクレオチド残基、アミノ化ヌクレオチド残基およびチオ化ヌクレオチド残基からなる群から選択された少なくとも一つである、請求項5記載のc-Met結合核酸分子。
- 前記修飾化ヌクレオチド残基が、シトシンを有するヌクレオチド残基およびウラシルを有するヌクレオチド残基の少なくとも一方である、請求項5または6記載のc-Met結合核酸分子。
- 前記修飾化ヌクレオチド残基が、リボース残基が修飾されたヌクレオチド残基である、請求項5から7のいずれか一項に記載のc-Met結合核酸分子。
- 前記核酸分子の全塩基数が、40~100塩基である、請求項1から8のいずれか一項に記載のc-Met結合核酸分子。
- 前記核酸分子が、ステムループ構造を形成可能である、請求項1から9のいずれか一項に記載のc-Met結合核酸分子。
- 請求項1から10のいずれか一項に記載のc-Met結合核酸分子を含み、c-Metタンパク質と前記c-Met結合核酸分子との結合により、c-Metタンパク質の機能を中和することを特徴とする中和剤。
- 請求項1から10のいずれか一項に記載のc-Met結合核酸分子を含み、c-Metタンパク質と前記c-Met結合核酸分子との結合により、c-Metタンパク質の機能を阻害することを特徴とする阻害剤。
- 請求項1から10のいずれか一項に記載のc-Met結合核酸分子を含むことを特徴とする医薬品。
- 前記医薬品が、抗癌剤、抗炎症剤、抗肝障害剤および抗筋委縮性側索硬化症剤からなる群から選択された少なくとも一つである、請求項13記載の医薬品。
- 請求項1から14のいずれか一項に記載のc-Met結合核酸分子を含むことを特徴とする組成物。
- さらに、キャリアーを含む、請求項15記載の組成物。
- 請求項1から10のいずれか一項に記載のc-Met結合核酸分子を含むことを特徴とする、前記c-Metタンパク質を検出するためのc-Met検出試薬。
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US13/812,190 US8822667B2 (en) | 2010-07-26 | 2011-07-26 | Nucleic acid molecule capable of binding to c-Met and use thereof |
AU2011283736A AU2011283736A1 (en) | 2010-07-26 | 2011-07-26 | Nucleic acid molecule capable of binding to c-Met and use thereof |
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NAOMI HIRABAYASHI ET AL.: "Analysis of c-Met binding aptamer", DAI 83 KAI ANNUAL MEETING OF THE JAPANESE BIOCHEMICAL SOCIETY AND DAI 33 KAI ANNUAL MEETING OF THE MOLECULAR BIOLOGY SOCIETY OF JAPAN GODO TAIKAI, 10 December 2010 (2010-12-10), pages 2P-1258, XP008166799 * |
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