WO2010094899A1 - ACIDES NUCLEIQUES SE LIANT SPECIFIQUEMENT AU FACTEUR VII/VIIa HUMAIN, ET UTILISATIONS - Google Patents
ACIDES NUCLEIQUES SE LIANT SPECIFIQUEMENT AU FACTEUR VII/VIIa HUMAIN, ET UTILISATIONS Download PDFInfo
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- WO2010094899A1 WO2010094899A1 PCT/FR2010/050291 FR2010050291W WO2010094899A1 WO 2010094899 A1 WO2010094899 A1 WO 2010094899A1 FR 2010050291 W FR2010050291 W FR 2010050291W WO 2010094899 A1 WO2010094899 A1 WO 2010094899A1
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- C12N15/09—Recombinant DNA-technology
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/115—Aptamers, i.e. nucleic acids binding a target molecule specifically and with high affinity without hybridising therewith ; Nucleic acids binding to non-nucleic acids, e.g. aptamers
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- A61K31/711—Natural deoxyribonucleic acids, i.e. containing only 2'-deoxyriboses attached to adenine, guanine, cytosine or thymine and having 3'-5' phosphodiester links
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
- A61P35/04—Antineoplastic agents specific for metastasis
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- A—HUMAN NECESSITIES
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- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P7/00—Drugs for disorders of the blood or the extracellular fluid
- A61P7/04—Antihaemorrhagics; Procoagulants; Haemostatic agents; Antifibrinolytic agents
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- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/02—Non-specific cardiovascular stimulants, e.g. drugs for syncope, antihypotensives
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P9/00—Drugs for disorders of the cardiovascular system
- A61P9/10—Drugs for disorders of the cardiovascular system for treating ischaemic or atherosclerotic diseases, e.g. antianginal drugs, coronary vasodilators, drugs for myocardial infarction, retinopathy, cerebrovascula insufficiency, renal arteriosclerosis
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- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
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- C12N2310/30—Chemical structure
- C12N2310/35—Nature of the modification
- C12N2310/351—Conjugate
Definitions
- the present invention relates to the field of the identification of ligands specific for human factor VII / VIIa, these ligands being intended in particular for the purification and detection of this protein, as well as for their use in medical domain.
- FVII PRIOR ART Factor VII
- FVIIa is a vitamin K-dependent glycoprotein which, in its activated form (FVIIa), participates in the coagulation process by activating factor X and factor IX in the presence of calcium and tissue factor.
- FVII is secreted as a unique peptide chain of 406 amino acid residues, which has a molecular weight of about 50 kDa.
- FVIIa a vitamin K-dependent glycoprotein, therefore plays an important role in the mechanisms of coagulation, resulting in blood clot formation.
- FVIIa has the advantage of being able to act locally in the presence of the tissue factor released after lesion of tissues causing haemorrhages, even in the absence of Factor VIII or IX. This is why FVIIa has been used for many years to correct some bleeding disorders.
- FVII is used in the treatment of hemophilia patients with factor VIII (type A haemophilia) or factor IX (type B haemophilia) deficiency, as well as patients with other coagulation factor deficiencies. for example, a hereditary deficiency in FVII. FVII is also recommended for the treatment of stroke. It is therefore necessary to have injectable FVIIa concentrates.
- the oldest method of obtaining FVIIa concentrates was the purification of FVIIa from plasma proteins from fractionation.
- PPSB prothrombin or FII
- P proconvertin or FVII
- S Stuart factor or FX
- B antihemophilic factor B or FIX
- EP 0 547 932 describes a method of manufacturing a high purity FVIIa concentrate essentially free of vitamin K dependent factors and FVIII.
- the FVII obtained by this method despite its purity, has residual thrombogenic activity.
- DNA encoding human factor VII was isolated (Hagen et al (1986), Proc Natl Acad Sci USA, Apr 83 (8): 2412-6) and the corresponding protein. has been expressed in BHK (Baby Hamster Kidney) mammalian cells (EP 0 200
- Vll / Vlla Factor compositions purified from biological fluids from transgenic mammals it is important to have a free, or virtually free, end product of Vll / Vlla factor otherwise produced naturally by these transgenic mammals, likely to be immunogenic in humans.
- single-stranded nucleic acids having at least 15 nucleotides in length and binding specifically to human factor VIII / VIIa are provided.
- the present invention also relates to various compounds specifically binding to human factor VIII / VIIa, which comprise in their structure at least one nucleic acid defined above.
- This invention also relates to a support for the immobilization of the human factor VIII / VIIa, characterized in that it comprises a solid support material on which are grafted a plurality of nucleic acids or compounds as defined above.
- the subject of the invention is also a process for the immobilization of human factor VII / VIIa on a support, comprising a step during which a sample comprising human factor VII / VIIa is brought into contact with a support as defined herein. -above.
- the invention also relates to a method for purifying the human factor VII / VIIa comprising the steps of: a) contacting a sample comprising human factor VII / VIIa with a nucleic acid or with a support as defined hereinabove.
- the invention also relates to a method for detecting the presence of human factor VII / VIIa in a sample comprising the following steps: a) contacting a nucleic acid or a support as defined above with said sample; and b) detecting the formation of complexes between (i) said nucleic acid or said carrier and (ii) Vll / Vlla Factor
- the present invention also relates to preventive or curative medical uses of the nucleic acids as defined above.
- Figure 1 illustrates the results of a calculation of the nucleic acid folding model of the invention (Mapt2).
- the computer program mFold was used according to parameters identical to those used to obtain the structure represented in FIG. 1, namely the following conditions: (i) linear sequence DNA, (ii) refolding temperature: 25 0 C, (iii) ionic conditions: [Na + ]: 150 mM; [Mg ++ ]: 4 mM, (iv) type of correction: Oligomer, (v) number of the percentage of "suboptimality”: 2, (vi) upper limit of the number of folds calculated: 50, (vii) maximum distance between two base pairs: no limit, and (viii) use default values for other parameters.
- Figure 2 illustrates the binding curves of a nucleic acid diversity of the invention (Mapt2, Mapt3 and Mapt7) to human plasma Factor VII immobilized on a support, in a test according to the surface plasmon resonance technique.
- abscissa the time, expressed in seconds; ordinate, resonance signal, expressed in arbitrary resonance units.
- Figure 3 illustrates the plasma human factor VII binding curves, used at various concentrations, on a carrier-immobilized nucleic acid of the invention (Mapt2) in a surface plasmon resonance test.
- Mapt2 carrier-immobilized nucleic acid of the invention
- curves represent, from the top to the bottom of the figure, curve 1 "[FVII]”: purified human plasma FVII at a concentration of 500 nM; curve 2 "[FVII]”: purified human plasma FVII at a concentration of 250 nM; curve 3 "[FVII]”: purified human plasma FVII at a concentration of 125 nM; curve 4 "[FVII]”: human FVII purified plasma at a concentration of 62.5 nM; lower curves: preparation of purified immunoglobulins at the respective concentrations of 62, 125, 250 and 500 nM
- Figure 4 illustrates the binding curve (i) of recombinant human factor VII to a carrier-immobilized nucleic acid of the invention (Mapt2), and (ii) the binding curve of a human anti-human FVII monoclonal antibody to immobilized nucleic acid / FVII complex formed in (i), in a test according to the technique of surface plasmon resonance.
- abscissa the time, expressed in seconds; ordinate, resonance signal, expressed in arbitrary resonance units.
- Figure 5 illustrates a saturation curve of a support on which is immobilized a nucleic acid of the invention (Mapt2), with the human factor VII plasma injected continuously over time. Test according to the surface plasmon resonance technique. On the abscissa: the time, expressed in seconds; ordinate, resonance signal, expressed in arbitrary resonance units. Upper curve: signal obtained with purified human FVII at a concentration of 500 nM.
- Figure 6 illustrates plasma kinase Factor VII binding kinetics curves on a carrier-immobilized nucleic acid of the invention (Mapt2) in a surface plasmon resonance test. On the abscissa: the time, expressed in seconds; in ordinates, resonance signal, expressed in arbitrary resonance units FIG.
- FIG. 7 illustrates the binding curves of F VII proteins of various origins on a nucleic acid of the invention (Mapt2) immobilized on a support, in a test according to FIG. surface plasmon resonance technique.
- Mapt2 nucleic acid of the invention
- Figure 8 illustrates the binding curves of human plasma factor VII and recombinant rabbit Factor VII on a carrier-immobilized nucleic acid of the invention (Mapt2) in a surface plasmon resonance test.
- Mapt2 carrier-immobilized nucleic acid of the invention
- FIG. 9 illustrates the structure of a human Vll / VIIa-specific binding compound comprising an aptamer according to the invention (Mapt2) coupled to a spacer chain of PEG, the spacer chain being itself coupled to a biotin molecule. .
- Figure 10 illustrates an alignment of various aptamers specifically binding to the selected Human Vll / VIIa Factor at the end of a run cycle of a SELEX type process.
- the sequences shown in Figure 10 are, from top to bottom of the figure, respectively the sequences SEQ ID N 0 87 to SEQ ID NO 0100.
- FIG. 11 illustrates a chromatography profile obtained during the implementation of the method for purifying a recombinant human factor VII produced in rabbit milk with the affinity support in which human anti-FVII nucleic aptamers are immobilized.
- the absorbance value (OD) On the abscissa; the weather ; on the ordinate: the absorbance value (OD) at 254 nanometers.
- Figure 12 illustrates the binding curves of a series of 27 nucleic aptamers of the invention to human plasma Factor VII immobilized on a support, in a test according to the surface plasmon resonance technique.
- abscissa the time, expressed in seconds; ordinate, resonance signal, expressed in arbitrary resonance units.
- Figure 13 illustrates the individual values of stable binding signal of each of the 27 aptamers tested.
- abscissa each of the 27 aptamers tested;
- ordinate resonance signal, expressed in arbitrary resonance units.
- Figure 14 shows the curve of measured values of absorbance at 280 nm versus time.
- Figure 15 shows the image of an SDS PAGE electrophoresis gel in which lane no. 1 corresponds to the fraction of the starting material and lane no. 2 to the elution fraction.
- Figure 16 shows the binding curves of the immobilized aptaptin Mapt2 to recombinant human factor VII produced in the milk of a transgenic rabbit.
- the arrows correspond to the time of the different injections, respectively from left to right in FIG. 16: 1: injection of the recombinant factor VII; 2: injection of a 1M NaCl buffer; 3: injection of a 2M NaCl buffer, 4: injection of a 3M NaCl buffer; 5: injection of a 50 mM Tris buffer, 10 mM EDTA.
- On the abscissa the time expressed in seconds; on the ordinate; the value of the response signal, expressed in arbitrary units (RU).
- Figure 17 shows the binding curves of the immobilized aptaptin Mapt2 to recombinant human factor VII produced in the milk of a transgenic rabbit.
- the arrows correspond to the time of the different injections, respectively from left to right in Figure 17: 1: 50% propylene glycol; 2: EDTA at 10 mM.
- new means capable of binding specifically to the human factor VIII / VIIa, of reduced size, which are easy and inexpensive to synthesize, and which can be used in all fields of application in which such means are useful, including for the purification of human factor VII / VIIa, for the detection of human factor VII / VIIa and for the use as an active ingredient of medicaments for the prevention or treatment of coagulation disorders .
- the Applicant has constructed a family of single-stranded nucleic acids capable of specifically binding to the human factor VIII / VIIa, which have in common numerous structural characteristics, which will be detailed later in the present description.
- the family of nucleic acids of the invention which are able to bind specifically to human factor VII / VIIa, consist of single-stranded nucleic acids, preferably of the DNA type, which By virtue of certain structural features provided by their nucleotide sequence, they are able to adopt conformations in space which contribute to their conferring their aforementioned Factor VIII / VIIa binding properties.
- the nucleic acids of the invention may also be called "aptamers" nucleotides, with reference to a term commonly used by those skilled in the art to designate this type of molecules.
- the subject of the present invention is a nucleic acid having at least 15 nucleotides in length and binding specifically to human factor VIII / VIIa.
- Human Factor VII / VIIa may also be referred to as "nucleic aptamer”, “aptamer”, “human factor Vll / Vlla binding aptamer” or “human anti-FVII / Vlla aptamer”.
- human Vll / Vlla factor a naturally occurring human Vll / Vlla factor and a recombinant human Vll / Vlla factor are encompassed.
- a human factor VII / VIIa is considered with reference to its amino acid sequence, that is to say regardless of whether the protein is glycosylated or non-glycosylated, and if the protein is glycosylated , regardless of the type of glycosylation.
- certain embodiments of the human Vll / Vlla Factor specific binding nucleic acids of the invention have a variety of common structural features, including a sequence comprising from the 5 'to 5' end. 3 'end, successively (i) an invariable specific nucleotide sequence of about 20 nucleotides in length, followed by (ii) a variable nucleotide sequence of about 40 to 50 nucleotides in length, followed by (iii) a specific nucleotide sequence invariable about 20 nucleotides in length. It states that Variable nucleotide sequences (ii) can have a very strong nucleotide sequence identity between them.
- the Applicant has therefore constructed a family of nucleic aptamers that specifically bind to the human factor VII / VIIa, the existence of which has been shown to exist between (i) the common structural characteristics and (ii) the common functional characteristic (s).
- the family of nucleic acids, or nucleic aptamers, specifically binding to the human factor VII / VIIa of the invention comprises at least 15 consecutive nucleotides of a polynucleotide having at least 40% identity.
- SEQ ID N 0 X is a nucleic acid selected from the group consisting of nucleic acid sequences SEQ ID No. 3 to SEQ ID No. 85 and SEQ ID NO: 87 to SEQ ID N 0 I OO,
- - "x" is an integer equal to 0 or 1
- - "y" is an integer equal to 0 or 1.
- the acid of sequence SEQ ID N 0 X has a length of 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, or 50 nucleotides.
- the nucleic acid of sequence SEQ ID N 0 X has a length of 43, 44, 45, 46, 47, 48 or 49 nucleotides in length.
- the nucleic acid of sequence SEQ ID N 0 X has a length of 43, 44 or 45 nucleotides in length.
- the nucleic acid of formula (I) is at least 15 nucleotides in length.
- the nucleic acid of formula (I) has at least 15, 16,
- nucleotides in length which includes nucleic acids having exactly each of the specified lengths.
- the successive cycles of selection carried out to construct the family of nucleic acids of interest that bind specifically to the human factor VII / VIIa have resulted in isolating and characterizing, at each successive step of selection, sets and subsets of nucleic aptamers comprising, at their ends, 5 'and 3', respectively the sequences SEQ ID No. 1 and SEQ ID No. 2, structurally framing a sequence variable SEQ ID N 0 X.
- the set of variable sequences SEQ ID N 0 X have between them a nucleotide sequence identity of at least 40%. This means that, for the sequence SEQ ID No. X, the structure constraints, to maintain the binding property to the human factor Vll / Vlla, are much less than the structure constraints for the sequences located respectively at the 5 'and 3 ends. of these nucleic aptamers.
- the nucleic aptamers of the invention include nucleic acids comprising at least 15 consecutive nucleotides of a polynucleotide having at least 40% nucleotide identity with the nucleic acid of formula (1-1) following 5 '- [SEQ ID N 0 X] - [SEQ ID No.2] -3' (1-1),
- the nucleic aptamers of the invention include nucleic acids comprising at least 15 consecutive nucleotides of a polynucleotide having at least 40% nucleotide identity with the nucleic acid of the following formula (I-2) 5 '- [SEQ ID NO: 1] - [SEQ ID NO: X] -3' (I-2)
- the nucleic aptamers of the invention include nucleic acids comprising at least 15 consecutive nucleotides of a polynucleotide having at least 40% nucleotide identity with the nucleic acid of the following formula (I-3): 5 '- [SEQ ID NO: X] -3' (1-3)
- nucleic aptamers thus include nucleic acids comprising at least 15 consecutive nucleotides of a polynucleotide having at least 40% nucleotide identity with a nucleic acid selected from the group consisting of nucleic acids of SEQ ID NO: 3 sequences. to SEQ ID NO: 85 and SEQ ID NO: 87 to SEQ ID NO: 0 IOO.
- a first polynucleotide having at least 40% nucleotide identity with a second polynucleotide or nucleic acid has at least 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48% 49% 50% 51% 52% 53% 54% 55% 56% 57% 58% 59% 60% 61% 62% 63% 64% 65 % 66% 67% 68% 69% 70% 71% 72% 73% 74% 75% 76% 77% 78% 79% 80% 81% 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 100% nucleotide identity with said second polynucleotide or nucleic acid.
- nucleic acid of the invention comprising the sequence SEQ ID N 0 X
- said sequence SEQ ID N 0 X is selected from the group consisting of nucleic acids having at least 15 consecutive nucleotides of a sequence possessing at least 40% nucleotide identity with at least one of SEQ ID NO : 3 to SEQ ID NO: 85 and SEQ ID NO: 87 to SEQ ID NO: 100.
- nucleic acid of the invention comprising the sequence SEQ ID N 0 X
- said sequence SEQ ID N 0 X is chosen from the group consisting of nucleic acids having at least 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%,
- the present invention encompasses a family of single-stranded nucleic acids having at least 15 consecutive nucleotides of the sequence of formula
- the "percent identity" between two nucleic acid sequences in the sense of the present invention is determined by comparing the two optimally aligned sequences through a comparison window.
- the part of the nucleotide sequence in the comparison window may thus comprise additions or deletions (for example "gaps") with respect to the reference sequence (which does not include these additions or deletions) so as to obtain a optimal alignment between the two sequences.
- the percent identity is calculated by determining the number of positions at which an identical nucleotide base is observed for the two compared sequences, and then dividing the number of positions at which there is identity between the two nucleobases by the total number of positions in the sequence. the comparison window, then multiplying the result by one hundred in order to obtain the percentage of nucleotide identity of the two sequences between them.
- the optimal alignment of the sequences for the comparison can be performed in a computer manner using known algorithms.
- TREE TYPE "cladogram”
- TREE GRAP DISTANCES "hide”.
- nucleic aptamer of formula (I) By way of illustration and for certain embodiments of a nucleic aptamer of the invention, one skilled in the art can readily, on the basis of the structural definition above nucleic aptamers of formula (I), generate automatically, for example using a digital computer whose memory is loaded with an appropriate set of instructions, the set of sequences SEQ ID N 0 X possible. Where appropriate, those skilled in the art can then automatically determine, using said digital computer, respectively (i) those sequences whose structure pattern in space is similar or identical to that of the nucleic aptamer. Figure 1, and (ii) those whose structure of the nucleic aptamer is distinct from that of the nucleic aptamer of Figure 1.
- Nucleic aptamers having a similar spatial structure or identical to that of the nucleic aptamer of Figure 1 include those that comprise the loop and stem sequence that has been previously described for this nucleic aptamer.
- nucleic acid of formula (I) In order to determine the spatial structure of a nucleic acid of formula (I), one skilled in the art may, on the basis of the description of its nucleotide sequence, generate a structural model using the computer program mFold ® described by Zuker (2003, Nucleic Acids Research, Vol 231 (13): 3406-3413), which can also be used at the following web address: http://mfold.bioinfo.rpi.edu/.
- the computer program mFold is used, according to parameters identical to those used to obtain the structure represented in FIG. 1, namely the following conditions: (i) linear sequence DNA, (ii) refolding temperature: (iii) ionic conditions: [Na + ]: 150 mM; [Mg ++ ]: 4 mM, (iv) type of correction: Oligomer, (v) number of the percentage of "suboptimality": 2, (vi) upper limit of the number of folds calculated: 50, (vii) maximum distance between two base pairs: no limit, and (viii) use default values for other parameters.
- nucleic aptamer of the invention comprises at least 15 consecutive nucleotides of a polynucleotide having at least 80% nucleotide identity with the nucleic acid of formula (I), which encompasses aptamers comprising 15 consecutive nucleotides of a polynucleotide having at least 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92 %, 93%, 94%, 95%, 96%, 97%, 98% or 100% nucleotide identity with said nucleic acid of formula (I).
- the sequence SEQ ID N 0 X has at least 80% nucleotide identity with at least one of the sequences SEQ ID No. 3 to SEQ ID N 85 and SEQ ID NO: 87 to SEQ ID NO: 10 , which includes sequences having at least 81%, 82%, 83%, 84%, 85%, 86%, 87%, 88%, 89% , 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 100% nucleotide identity with at least one of SEQ ID NO: 3 to SEQ ID NO: 85 and SEQ ID NO: 87 to SEQ ID NO 0 I OO.
- sequence SEQ ID N 0 X is chosen from the group consisting of the sequences SEQ ID N 0 3 to SEQ ID No. 85 and SEQ ID No. 87 at SEQ ID N 0 I OO.
- sequence SEQ ID N 0 X is selected from the group consisting of SEQ ID N 0 3, 5, 6, 10, 11, 14 , 15, 16, 17, 19, 20, 23, 24, 25, 27, 28, 29, 30, 32, 33, 34, 35, 36, 37, 38, 39 and 40.
- a human Vll / Vlla-binding nucleic acid is a single-stranded nucleic acid capable of forming a complex with the human Vll / VIIa Factor when contacted with the human factor.
- the nucleic acids binding to the human factor VIII / VIIa therefore include those for which complexes with the human factor VII / VIIa can be detected after a prior step of contacting said respective nucleic and protein partners.
- the detection of complexes formed between a nucleic acid binding to the human factor VIII / VIIa can be easily performed by those skilled in the art, for example by implementing a surface plasmon resonance detection technique, including the Biacore ® technique. as illustrated in the examples.
- Those skilled in the art can also easily detect the formation of complexes between a nucleic acid of interest and human factor VII / VIIa by standard ELISA techniques, as is also illustrated in the examples.
- a nucleic acid of formula (I) has a strong binding capacity to any type of human factor VII / VIIa.
- a nucleic acid of formula (I) binds to both human and human Factor VII / VIIa and recombinant human factor VII / VIIa.
- nucleic acid of formula (I) has a strong capacity to bind to human factors Vll / VIIa having distinct types of glycosylation.
- the Applicant believes that a nucleic acid of formula (I) is capable of efficiently binding not only to the Vll / VIIa Factor from natural sources, including human plasma, but also to a Vll Factor.
- Recombinant human / Vlla produced in a transgenic animal, preferably a transgenic mammal, of different species, including the rabbit, whose types of glycosylation may differ slightly even from the type of glycosylation of human factor VII / VIIa naturally occurring in blood plasma.
- a nucleic acid binding "specifically" to human Factor VII / VIIa consists of a nucleic acid having an ability to bind human Factor VII / VIIa greater than its ability to bind to any other protein, including to the Factors
- Vll / VIIa encoded by the genome of a non-human mammal, such as Rabbit Factor VIII / VIIa.
- a first nucleic acid has the ability to bind human Factor VII / VIIa, greater than that of a second nucleic acid, when using any of the binding detection techniques set forth herein. above, and under the same test conditions, a statistically significant upper binding signal value is obtained with the first nucleic acid, relative to that obtained with the second nucleic acids.
- the used link detection technique is the Biacore ® technique
- a first nucleic acid has a capacity to bind to VII / VIIa Factor, greater than that of a second nucleic acid, when the resonance signal value for the first nucleic acid, regardless of the expressed resonance unit of measure, is statistically greater than the measured resonance signal value for the second nucleic acid.
- Two distinct "statistically" measured values encompass two values which have a greater difference than the measurement error of the link detection technique used. As illustrated in the examples, the ability of the nucleic acids of the invention to bind specifically to human factor VII / VIIa was tested.
- a nucleic acid of formula (I) has a dissociation constant value for human factor VII / VIIA of at most 500 nM, more preferably at most 200 nM.
- the nucleic acids of formula (I) have been shown to have an ability to bind to
- Vll / VIIa factor Human Vll / VIIa factor that is significantly greater than their binding capacity to any Vll / VIIa Factor from a non-human mammal.
- a nucleic acid of formula (I) has a strong ability to bind to any type of human factor Vll / VIIa, including natural or recombinant, it has little or no ability to bind to a specific factor.
- nucleic acid of formula (I) is illustrated in the examples in particular with the nucleic acid of sequence SEQ ID N 0 86, which consists of a nucleic acid of formula (I) wherein the sequence SEQ ID N 0 X consists of the sequence SEQ ID N 0 and 85, the structure after its coupling with PEG and biotin is shown in Figure 9.
- nucleic acid of formula (I) sequence SEQ ID N 0 86, was determined using the Biacore ® technique, the value of binding ability VII / Factor VIIa, expressed as the dissociation constant Kd, is about 100 nM.
- said nucleic acid of formula (I) has a binding capacity of the same order of magnitude both to human plasma Factor VII / VIIa and to a recombinant human factor VII / VIIa, for example produced in a transgenic rabbit.
- the complexes between a nucleic acid of formula (I) and a human factor VII / VIIa are stoichiometric, that is to say that the ratio of the number of nucleic acid molecules of formula (I) the number of complexed human Vll / VIIa molecules is about 1: 1, and more preferably 1: 1.
- the ability of a nucleic acid of formula (I) to bind "specifically" to human Factor VII / VIIa can also be expressed as the ratio of dissociation constants Kd, respectively for Factor Vll / Human Vlla and a non-human factor Vll / VIIa.
- the capacity of said nucleic acid to bind specifically to human factor VIII / VIIa can also be expressed by the following condition (A):
- Human Kd is the dissociation constant of a nucleic acid of formula (I) for human Factor VII / VIIa, expressed in molar units
- non-human Kd is the dissociation constant of said nucleic acid of formula ( I) for a non-human factor VII / VIIa, expressed in the same molar units.
- the non-human human Kd / Kd ratio is preferably less than 0.01, better still less than 0.001.
- a nucleic acid of formula (I) can be advantageously used in a means for purifying a human factor VII / VIIa, including from a complex starting medium capable of containing a factor VIII. / VIIa from a non-human mammal.
- a nucleic acid of formula (I) may be used in a recombinant Vll / VIIa Factor purification means in a biological fluid of a transgenic rabbit for human factor VII / VIIa, said biological fluid being capable of containing a factor Vll / Vlla naturally produces by the rabbit.
- nucleic acid of formula (I) is its ability, in a complex with human Factor VII / VIIa, to releasing the human factor VIII / VIIa by incubating said complex with a metal cation chelating agent.
- a metal cation chelating agent such as EDTA.
- the binding of a nucleic acid of formula (I) according to the invention to human factor VIII / VIIa can be dissociated by contacting with a metal cation chelating agent, including by setting contact with EDTA.
- nucleic acid of formula (I) is particularly advantageous for the use of said nucleic acid in a means for purifying the human factor VII / VIIa.
- the human factor VII / VIIa immobilized in a complex with a nucleic acid of formula (I)
- metal cations so without requiring the use of known substances to denature, at least partially, the human factor VIII / VIIa, such as acidic conditions or urea.
- a nucleic acid of formula (I) according to the invention is preferentially immobilized on a solid support.
- Said solid support includes solid particles, chromatography media, etc. Techniques for immobilizing nucleic acids of interest on a wide variety of types of solid supports are well known to those skilled in the art.
- the solid support may be an affinity chromatography column composed of a gel derived from agarose, cellulose or a synthetic gel such as an acrylamide, methacrylate or polystyrene derivative, a chip such as a chip adapted to the surface plasmon resonance, a membrane such as a polyamide, polyacrylonitrile or polyester membrane or a magnetic or paramagnetic ball.
- a nucleic acid of formula (I) is preferentially included in a chemical structure also comprising a spacer means and, if appropriate, a means of immobilization. on a solid support.
- the present invention also relates to a compound that binds specifically to human factor VIII / VIIa, characterized in that it has the following formula (II):
- [NUCL] means a nucleic acid specifically binding to human Factor VII / VIIa comprising at least 15 consecutive nucleotides of a polynucleotide having at least 40% nucleotide identity with the nucleic acid of formula (I).
- the above compound is a particular embodiment of a human factor VIII / VIIa purification means.
- the "spacer chain" designated [SPAC] in the compound of formula (II) may be of any known type. Said spacer chain has the function of physically moving the nucleic acid [NUCL] away from the surface of the solid support on which said compound can be immobilized and to allow a relative mobility of the nucleic acid [NUCL], relative to the surface solid support on which it can be immobilized.
- the spacer chain limits or avoids that steric hindrances, due to an excessive proximity of the solid support with the nucleic acid of formula (I), interfere with the binding events between said nucleic acid and human Vll / Vlla Factor molecules that are likely to occur. to be put in contact with it.
- the spacer chain is preferably bonded to the 5 'end or the 3' end of [NUCL] nucleic acid.
- the spacer chain is bonded to both an end of the aptamer and the solid support.
- This spacer construction has the advantage of not directly immobilizing the aptamer on the solid support.
- the spacer chain is a nonspecific oligonucleotide or polyethylene glycol (PEG).
- PEG polyethylene glycol
- said spacer chain includes PEG-type polyethylene glycol (CI 8).
- the [NUCL] nucleic acid can be chemically modified with different chemical groups such as groups that make it possible to immobilize said nucleic acid in a covalent manner, such as thiols, amines or any other group capable of reacting with chemical groups present on the solid support.
- the spacer chain is itself capable of being immobilized on the solid support, where appropriate after modification of said spacer chain with one or more appropriate chemical groups.
- the spacer chain is linked to a compound for immobilizing the compound of interest comprising the nucleic aptamer on the mobile support.
- the present invention also relates to a compound that binds specifically to human factor VIII / VIIa, characterized in that it has the following formula (III):
- FIX means an immobilization compound on a support
- - [SPAC] means a spacer chain
- - [NUCL] means a nucleic acid specifically binding to human Factor VII / VIIa comprising at least 15 consecutive nucleotides of a polynucleotide having at least 40% nucleotide identity with the nucleic acid of formula (I).
- the compound of formula (III) above is an embodiment of a method for purifying human factor VIII / VIIa.
- Said means for purifying human Factor VII / VIIa of formula (II) or of formula (III) is preferably in a form bound to a solid support.
- the compound [FIX] consists of a compound chosen from
- the first type of compound [FIX] includes the bifunctional coupling agents, such as glutaraldehyde, SIAB or SMCC.
- the compound SIAB comprises two reactive groups, an iodoacetate group and a sulpho-NHS ester group respectively, these groups reacting respectively on amino and sulfhydryl groups.
- the SMCC compound which is described by Samoszuk M.K. et al. (1989, Antibody, Immunoconjugates Radiopharm., 2 (1): 37-46), is the compound of formula (II) below:
- the SMCC compound comprises two reactive groups, respectively a sulfo-NHS ester group and a maleimide group, which react respectively with an amino group and a sulfhydryl group.
- the second type of compound [FIX] includes biotin, which is capable of specifically non-covalently binding to avidin or streptavidin molecules present on the solid support.
- the aptamer when immobilized on the solid support via the spacer chain, is advantageously modified at its free end (end not bound to the spacer) by virtue of, and not limited to, a chemically nucleotide modified (such as 2'-O-methyl or 2'-fluoropyrimidine, 2'-ribopurine, phosphoramidite), an inverted nucleotide or a chemical group (PEG, polycations, cholesterol).
- a chemically nucleotide modified such as 2'-O-methyl or 2'-fluoropyrimidine, 2'-ribopurine, phosphoramidite
- an inverted nucleotide or a chemical group PEG, polycations, cholesterol
- the solid support may be an affinity chromatography column composed of a gel derived from agarose, cellulose or a synthetic gel such as an acrylamide, methacrylate or polystyrene derivative, a chip such as a chip adapted to the surface plasmon resonance, a membrane such as a polyamide, polyacrylonitrile or polyester membrane, a magnetic or paramagnetic ball.
- the present invention also relates to a complex between:
- the subject of the present invention is also a support for the immobilization of the human factor VII / VIIa, characterized in that it comprises a solid support material to which a plurality of molecules, each consisting of or each comprising a nucleic aptamer, are grafted. , said molecules being chosen from (a) a nucleic acid of formula
- the above support can be used in virtually any application for which human Vll / Vlla Factor is to be immobilized, which includes applications for Vll / Vlla Factor Purification and applications for the detection of Factor VIII / Vlla. Human factor VII / VIIa.
- the present invention therefore also relates to a method for immobilizing human factor VII / VIIa on a carrier, comprising a step in which a sample comprising human factor VII / VIIa is contacted with a solid support on which previously immobilized a substance selected from a nucleic acid of formula (I), a compound of formula (II) and a compound of formula (III).
- Said method may comprise, according to the technical objectives pursued, an additional step of recovering the molecules of Immobilized human factor VII / VIIa, complexed with the nucleic acid molecules of formula (I).
- the additional Factor VIII / VIIa recovery step preferably consists of a step of contacting the Factor VII / VIIa complexes with the nucleic acids of formula (I) with a metal cation chelating agent, such as EDTA.
- a metal cation chelating agent such as EDTA.
- the subject of the present invention is also a process for the purification of the factor
- Human / human Vlla comprising the following steps: a) contacting a sample comprising human Factor VII / VIIa with a nucleic acid of formula (I), a compound of formula (II), a compound of formula (III) or with a solid support as defined in the present description, to form a complex between (i) said nucleic acid or said support and (ii) human factor VII / VIIa, and b) release human factor VII / VIIa from the complex form in step a) and recover the purified human factor VIII / VIIa.
- buffer reduced concentration MgCl 2 is meant according to the invention a buffer whose final concentration of MgCl 2 is less than 1 mM.
- a buffer whose concentration of MgCl 2 is less than 1 mM includes buffers whose concentration of MgCl 2 is less than 0.5 mM, 0.1 mM, 0.05 mM and 0.01 mM, advantageously equal to 0 mM.
- the method comprises a step a '), step a' following step a) and preceding step b), which consists of a step of washing the affinity support with a buffer washing.
- the process comprises a step 1 ) of washing the affinity support during which the ionic strength is increased, that is to say that a washing buffer is used whose ionic strength is increased relative to the ionic strength of the buffer used in step a).
- the ionic strength of the washing buffer used in step a ') is greater by 2 to 500 times with respect to the ionic strength of the buffer used in step a).
- the ionic strength of the washing buffer is greater by 100 to 500 times, preferably 200 to 500 times, relative to the ionic strength of the buffer used in step a). It has been shown in the examples that the use, in washing step a '), of a washing buffer having a high ionic strength, in particular a buffer having a high concentration of NaCl, makes it possible to effectively eliminate substances non-specifically related to the affinity support without simultaneously affecting detectably the binding of Factor VII to the affinity support.
- a washing buffer having a final NaCl concentration of at least 1M is preferably used.
- a washing buffer having a final NaCl concentration of at least 1 M includes wash buffers having a final NaCl concentration of at least 1.5M, 2M, 2.5M or at least 3M.
- a washing buffer used in step a ') of the process has a final NaCl concentration of at most 3.5 M.
- a washing buffer used in step a') of the process has a concentration of final NaCl content of between 1.5 and 3.5, preferably between 2 and 3.5, preferably between 2.5 and 3.5, for example preferably between 3 and 3.5.
- step a ') of a washing buffer having a high hydrophobicity, in particular a high concentration of propylene glycol makes it possible to effectively remove the non-ionically bound substances. specific to the affinity support without simultaneously sensibly affecting the binding of Factor VII to the affinity support.
- step a ' a wash buffer with a final propylene glycol content of at least 20% (v / v) is preferably used.
- a wash buffer having a final propylene glycol content of at least 20% includes wash buffers having a final propylene glycol content of at least 25% M, 30%, 35%, 40% , 45%, 50%, 55%, or at least 60% by volume, based on the total volume of the wash buffer.
- a wash buffer used in step a ') of the process has a final propylene glycol content of at most 50%.
- a washing buffer used in step a ') of the process has a final propylene glycol content of between 20% and 50%, preferably between 30% and 50%.
- the washing buffer used in step a ') contains both NaCl and propylene glycol as described above.
- step b) is performed by contacting the affinity support with an elution buffer containing a divalent ion chelating agent, preferably EDTA.
- the elution buffer may contain a final concentration of EDTA of at least 1 mM and at most 30 mM.
- the term "at least 1 mM” includes at least 2, 3, 4, 5, 6, 7, 8, 9 or 10 mM.
- the expression “not more than 30 mM” includes not more than 29, 28, 27, 26, 25, 24, 23, 22, 21, 20,
- an affinity support comprising a nucleic aptamer of the invention and the realization of a method of purifying human Factor VII with said affinity support is illustrated in the examples.
- the solid supports on which the aptamers of the invention can be immobilized include any type of support having the structure and composition commonly found for filter supports, silicon support for chips, membranes, etc.
- Solid supports include resins, resins for affinity chromatography columns, polymer beads, magnetic beads, and the like.
- Solid supports also include glass or metal-based materials such as steel, gold, silver, aluminum, copper, silicon, glass and ceramics.
- Solid supports also include, in particular, polymeric materials, such as polyethylene, polypropylene, polyamide, polyvinylidene fluoride, and combinations thereof.
- the solid support may be coated with a material facilitating attachment, fixation, complex formation, immobilization or interaction with aptamers.
- the solid support is a glass slide whose surface is coated with a gold layer, a carboxymethylation-treated layer, a layer of dextran, collagen, avidin, streptavidin, etc.
- the aptamers according to the invention can be immobilized on the solid support by means of an attachment coating, as for example described above, either by chemical reaction with creation of covalent bonds, or by association by non-covalent bonds such as hydrogen bonds, electrostatic forces, Van der Waals forces, etc.
- affinity support generally means a support formed of a solid material on which nucleic aptamers as defined in the present description have been immobilized.
- solid supports consisting of a glass slide coated with a layer of streptavidin molecules, and aptamers of the invention conjugated to a biotin molecule which are immobilized on the support by non-covalent association of biotin / streptavidin.
- solid supports consisting of a polystyrene material coated with a layer of streptavidin molecules, and aptamers of the invention conjugated to a biotin molecule which are immobilized on the support by non-covalent association biotin / streptavidin.
- the aptamers of the invention may be immobilized on a solid support suitable for affinity chromatography, electrochromatography and capillary electrophoresis, as described, for example, by Ravelet et al. al. (2006, J Chromatogr A, Vol.117 (1): 1-10), Connor et al. (2006, J Chromatogr A, Vol.111 (2): 115-119), Cho et al. (2004, Electrophoresis, Vol 25 (21-22): 3730-3739) or Zhao et al. (2008, Anal Chem, Vol 80 (10): 3915-3920).
- An aptamer of formula (I) having at least 15 nucleotides in length and binding specifically to human Factor VII / VIIA, a compound of formula (II), or a compound of formula (III), can also be advantageously used as a capture of human FVII / VIIa, in detection or diagnostic methods and devices.
- the present invention also relates to a method for detecting the presence of human factor VII / VIIa in a sample comprising the following steps: a) contacting (i) a nucleic acid of formula (I), a compound of formula (II) or a compound of formula (III) or a solid support on which are immobilized a plurality of molecules of said nucleic acid or said compound, with (ii) said sample; and b) detecting the formation of complexes between (i) said nucleic acid of formula (I), said compound of formula (II) or said compound of formula (III) or said support and (ii) the factor
- the examples of the present patent application provide various embodiments of methods for detecting human FVII / VIIa with aptamers of the invention previously immobilized on a solid support.
- the solid support used may be a solid support chosen from the solid supports described above in connection with the method for purifying the human factor VII / VIIa.
- step b) of detecting complex formation between (i) said nucleic acid or said solid support and (ii) human factor VII / VIIa may be performed by measuring the plasmonic resonance signal of surface, as described in the examples.
- the step b) of detecting the formation of complexes between (i) said nucleic acid or said solid support and (ii) the human factor VII / VIIa can be achieved by bringing said complexes into contact with each other. optionally formed with a human Factor VII / VIIa ligand, said ligand being detectable.
- a human Factor VII / VIIa ligand optionally formed with a human Factor VII / VIIa ligand, said ligand being detectable.
- those embodiments are described in which, as the detectable ligand of the human factor VII / VIIa, human anti-FVII / VIIa monoclonal or polyclonal antibodies, labeled with an enzyme, namely horseradish peroxidase, are used. as conventionally used in ELISA type tests.
- the sample comprising or capable of comprising human factor VIII / VIIa consists of a liquid sample which contains the human factor VII / VIIa, including a liquid sample comprising the human factor VII / VIIa and which is capable of containing also Vll / VIIa molecules of a non-human mammal.
- said sample consists of a biological solution, such as a body fluid, a cell, a cell crumb, a tissue, a tissue mill, an organ or an entire organism.
- said sample consists of a liquid biological solution from an animal such as blood, a blood derivative (blood derivative), mammalian milk or a mammalian milk derivative.
- Said sample may consist of plasma, plasma cryoprecipitate, clarified milk or their derivatives.
- said sample is derived from a transgenic animal for human factor VIII / VIIa.
- the solution is mammalian milk or a transgenic mammalian milk derivative for the human factor VII / VIIa.
- the transgenic animals include (i) non-human mammals such as cows, goats, rabbits, pigs, monkeys, rats or mice, (ii) birds or (iii) ) insects such as mosquitoes, flies or silkworms.
- the transgenic animal for human factor VIII / VIIa is a non-human transgenic mammal, most preferably a transgenic rabbit for human factor VIII / VIIa.
- the transgenic mammal produces the recombinant Vll / VIIa factor in its mammary glands, because of the insertion into its genome of an expression cassette comprising nucleic acid encoding the human factor VII / VIIa which is placed under the control of a specific promoter allowing the expression of the transgene protein in the milk of said transgenic mammal.
- a method for producing human Factor VII / VIIa in the milk of a transgenic animal may comprise the following steps: a DNA molecule comprising a gene encoding human factor VII / VIIa, said gene being under the control of a promoter of a naturally secreted protein in the milk (such as the casein, beta-casein, lactalbumin, beta-lactoglobulin promoter or the WAP promoter) is integrated into an embryo of a non-human mammal. The embryo is then placed in a female mammal of the same species. Once the mammal from the embryo has grown sufficiently, the lactation of the mammal is induced, then the milk collected. The milk then contains the human factor VII / VIIa.
- a promoter of a naturally secreted protein in the milk such as the casein, beta-casein, lactalbumin, beta-lactoglobulin promoter or the WAP promoter
- a plasmid containing the WAP (Whey Acidic Protein) promoter is manufactured by introducing a sequence comprising the promoter of the WAP gene, this plasmid being made in such a way as to be able to receive a foreign gene placed under the control of the WAP promoter.
- the plasmid containing the promoter and the gene coding for the protein of the invention are used to obtain transgenic rabbits by microinjection into the male pronucleus of rabbit embryos. The embryos are then transferred into the oviduct of hormonally prepared females.
- transgenic mammal The presence of the transgenes is revealed by the Southern technique from the DNA extracted from the transgenic rabbits obtained. Concentrations in animal milk are evaluated using specific radioimmunoassays. Other documents describe methods for preparing proteins in milk of a female mammal other than man. These include, but are not limited to, US 7,045,676 (transgenic mouse) and EP 1,739,170 (production of von Willebrand factor in a transgenic mammal).
- a nucleic acid having at least 15 nucleotides in length and specifically binding to human Factor VII / VIIa can be used in vivo in physiological situations requiring inhibition of Factor X by Factor VIIa, for example by inhibiting the formation of a functional complex Factor VII / Tissue Factor ("Tissue Factor").
- an aptamer nucleic acid as defined in the present description can also be used, as a preventive or curative, as anticoagulant active ingredient of a drug.
- an aptamer nucleic acid as defined in the present description may be used as a preventive or curative anticoagulant active ingredient, in particular for the treatment of coagulation disorders including venous thromboses, arterial thromboses, post-surgical thromboses, coronary artery bypass (CABG) disorders, stroke, percutaneous transdermal coronary angioplasty (PTCA), tumor metastasis, non-severe or severe inflammatory reactions, septic shock, hypotension, acute respiratory distress syndrome (ARDS), pulmonary embolisms, disseminated intravascular coagulation (DIC), vascular restenosis, platelet deposition, myocardial infarction, angiogenesis, and any prohylactic treatment of men or women at risk of developing thrombosis.
- coagulation disorders including venous thromboses, arterial thromboses, post-surgical thromboses, coronary artery bypass (CABG) disorders, stroke, percutaneous transdermal coronary angioplasty (PTCA), tumor metastasis, non
- the present invention also relates to a pharmaceutical composition
- a pharmaceutical composition comprising a nucleic acid having at least 15 nucleotides in length specifically binding to the human factor VIII / VIIa as defined in the present description, in combination with one or more pharmaceutically acceptable excipients.
- the amount of human anti-FVII / FVIIa aptamer nucleic acid according to the invention, in a pharmaceutical composition, is adapted to allow the administration of an effective amount of this active ingredient to patients.
- the dosage ranges of the human anti-FVII / VIIa aptamer of the invention may be readily determined by the physician or pharmacist.
- the amount of active ingredient to be administered varies with the patient's age, medical condition, and sex, as well as with the degree of spread of the disease or degree of risk of developing the disease, and may be easily determined by those skilled in the art.
- a pharmaceutical composition comprises an amount of a human anti-FVII / VIIa aptamer ranging from 1 nanogram to 100 milligrams per unit dose, more preferably from 100 nanograms to 10 milligrams per unit dose.
- a pharmaceutical composition according to the invention comprises from 0.01% to 99.9% by weight of an anti-FVII / VIIa aptamer, or a combination of several anti-FVII / VIIa aptamers, and from 99% to 99.9% by weight of an anti-FVII / VIIa aptamer. , 9% to 0.01% by weight of an excipient, or a combination of excipients, relative to the total weight of said composition.
- said pharmaceutical composition comprises 1, 2, 3, 4, 5 or 6 different anti-FVII / VIIa aptamers.
- an anti-human FVII / VIIa aptamer according to the present invention is prepared in a form adapted to the chosen type of administration, for example in liquid form or in freeze-dried form.
- the anti-human FVII / VIIa aptamer pharmaceutical compositions according to the present invention may contain an excipient and / or a pharmaceutically acceptable carrier, preferably an aqueous carrier.
- compositions for example, water, buffered water, saline solution, glycine solution and their derivatives as well as agents necessary to reproduce physiological conditions such as buffering agents and pH adjusters, surfactants such as sodium acetate, sodium lactate, sodium chloride, potassium chloride, calcium chloride, this list not being limiting.
- the pharmaceutical composition can be sterilized by sterilization techniques well known to those skilled in the art.
- a pharmaceutical composition according to the invention, one skilled in the art can advantageously also refer to the latest edition of the European Pharmacopoeia, for example to the 5th edition of the European Pharmacopoeia published in January 2005, or again at the 6th edition of the European Pharmacopoeia, available to the public in June 2007.
- the skilled person may also refer to the content of PCT Application No. WO 2007/058801, PCT Application No. WO 2005/084412 0 and demand PCT WO 2004/047742 n 0. or in the PCT application WO 2008/150495 n 0.
- the anti-human FVII / Vlla aptamer active ingredient (s) may be used alone or in combination with one or more other pharmaceutically acceptable molecules.
- active agents including one or more other anticoagulant active ingredients.
- the invention also relates to a nucleic acid having at least 15 nucleotides in length specifically binding to human factor VIII / VIIa, as defined herein, for use as a medicament.
- the invention also relates to the use of a nucleic acid having at least 15 nucleotides in length specifically binding to human factor VIII / VIIa, as defined in the present description, for the manufacture of a medicament for the treatment coagulation disorders.
- the invention also relates to the use of a nucleic acid having at least 15 nucleotides in length specifically binding to human factor VIII / VIIa, as defined in the present description, for the treatment of coagulation disorders.
- the invention also relates to a method for preventing or treating a coagulation disorder, comprising a step in which a patient requiring a preventive or curative treatment of a coagulation disorder is administered a anti-human FVII / Vlla aptamer pharmaceutical composition as defined herein.
- a daily dose of an anti-human FVII / VIIa aptamer as defined in the present description is administered from 1 nanogram to 100 milligrams, more preferably from 100 nanograms to 10 milligrams, for a patient of 80 kgs.
- a solid support was made on which were immobilized plasma purified human Vll / VIIa molecules of plasma origin.
- Human Factor VII is immobilized on NHS-EDC-activated dextran carboxymethyl and binding to the free amines present on FVII / VIIa.
- the human factor VII / VIIa is thus immobilized with a immobilization rate of 2743 RU (1 RU corresponds approximately to 1 ⁇ g of immobilized product per mm 2 ).
- Nucleic aptamers of the invention purity: 99%
- aptaptor Mapt 2 SEQ ID No. 86
- aptamer Mapt 3 SEQ ID No. 41
- aptamer Mapt 7 SEQ ID No. # 58
- Each sample was injected sequentially on the same chip (solid support) containing the immobilized human FVII. Controls are obtained by injecting whites containing only the race buffer. All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec. After the injection, the stroke buffer was injected onto the chip at the same rate for 120 sec. Elution buffer (EDTA, 5mM) was then injected for 60 sec with a flow rate of 30 ⁇ l / min to unhook the aptamer from immobilized human FVII.
- the chip makes it possible to study in real time the formation and the rupture of the interactions between the immobilized human FVII and each of the aptaptors Mapt2, Mapt3 and Mapt7 tested, thanks to the surface plasmon resonance (RPS).
- a linkage on the immobilized human FVII results in an increase in the signal in resonance unit (RU) recorded by the apparatus (FIG. 2).
- RU signal in resonance unit
- FIG. 2 A linkage on the immobilized human FVII results in an increase in the signal in resonance unit (RU) recorded by the apparatus (FIG. 2).
- GE Biacore T100
- the modeling of recorded interactions is done using the Biaevaluation (GE) Software.
- Example 2 Capture of Human Factor VII / VIIa by an aptamer nucleic acid according to the invention, immobilized on a support.
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules is available (S sensor chip SA series, GE)
- the solid support was contacted with the above aptamer compounds above in order to immobilize the nucleic acids of sequence SEQ ID N 0 86, by noncovalent association between the streptavidin molecules of the substrate and molecules of biotin aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 983 RU (1 RU corresponds approximately to 1 ⁇ g of immobilized product per mm 2 ).
- a preparation of immunoglobulins (Tegeline ®, marketed by LFB, France) was diluted in running buffer (Tris 50 mM, NaCl 50 mM, CaCl 2 10 mM, MgCl 2 4 mM, pH 7.4 ) to obtain four polyvalent immunoglobulin concentration samples of 62, 125, 250 and 500 nM.
- Each sample was injected sequentially on the same chip (solid support) containing the aptaptin Mapt2 immobilized by a biotin-streptavidin interaction. Controls are obtained by injecting whites containing only the race buffer. All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec. After the injection, the stroke buffer was injected onto the chip at the same rate for 120 sec. Elution buffer (EDTA, 5mM) was then injected for 30 sec with a flow rate of 30 ⁇ l / min to pick up the FVII HP aptamer ..
- the chip allows to study in real time the formation and rupture of interactions between FVII HP, or polyvalent immunoglobulins, and immobilized aptamer through surface plasmon resonance (SPR).
- SPR surface plasmon resonance
- a link on the immobilized aptamer results in an increase in the signal in resonance unit (RU) recorded by the apparatus ( Figure 3).
- Mapt2 aptamer once immobilized specifically binds to FVII HP, with significant affinity. Mapt2 aptamer does not bind to polyvalent immunoglobulins.
- Example 3 Capture of Human Factor VII / VIIa by an aptamer nucleic acid according to the invention, immobilized on a support.
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules (S sensor Chip SA series, GE) was then added.
- the above solid support was then contacted with the aptamer compounds above to immobilize the nucleic acids of the present invention.
- sequence SEQ ID NO : 86 by non-covalent association between the streptavidin molecules of the support and the biotin molecules of the aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 424.9 RU (1 RU corresponds approximately to 1 ⁇ g of immobilized product per mm 2 ).
- FVII HP Human FVII purified from plasma (FVII HP, purity: 99%) was diluted in running buffer (Tris 50 mM, NaCl 50 mM, CaCl 2 10 mM, MgCl 2 4 mM, pH 7.4) of in order to obtain a sample of concentration of FVII HP 50O nM.
- an injection sequence comprising (i) 50nm FVII HP and (ii) a 1 ⁇ M anti-FVII monoclonal antibody (Sigma, Ref. Clone No. MC1476 / EA8.1) was performed on the same chip. The conditions of injection and analysis are identical to those described above. If the aptamer actually retains FVII, the injection of anti-FVII monoclonal antibody should result in an increase in the signal in RU subsequent to the binding of the antibodies on the FVII itself linked to the aptamer. As controls, only antibodies are injected. The signal increase in RU shows that the aptamer recognizes the FVII ( Figure 4). The modeling of recorded interactions is done using the Software
- the results of this example show that the aptamer, once immobilized, binds specifically to FVII HP with significant affinity and that the observed signal is due to the retention of FVII on the aptamer.
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules is available (S sensor chip SA series, GE)
- the solid support was contacted with the above aptamer compounds above in order to immobilize the nucleic acids of sequence SEQ ID N 0 86, by noncovalent association between the streptavidin molecules of the substrate and molecules of biotin aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 983 RU (1 RU corresponds approximately to 1 ⁇ g of immobilized product per mm 2 ).
- FVII HP Human FVII purified from plasma (FVII HP, purity: 99%) was diluted in running buffer (Tris 50 mM, NaCl 50 mM, CaCl 2 10 mM, MgCl 2 4 mM, pH 7.4) of to obtain a 1 ⁇ M FVII HP concentration sample.
- Each sample was injected sequentially on the same chip (solid support) containing the aptaptin Mapt2 immobilized by a biotin-streptavidin interaction. Controls are obtained by injecting whites containing only the race buffer. All injections were performed with a flow rate of 30 ⁇ l / min for 700 sec. After the injection, the stroke buffer was injected onto the chip at an identical rate for 120 sec. Elution buffer (EDTA, 20 mM) was then injected for 30 sec with a flow rate of 30 ⁇ l / min to unhook the FVII HP from the aptamer.
- EDTA 20 mM
- the chip allows to study in real time the formation and the rupture of the interactions between the FVII HP, and the immobilized aptamer thanks to the surface plasmon resonance (RPS).
- RPS surface plasmon resonance
- a link on the immobilized aptamer results in an increase in the signal in resonance unit (RU) recorded by the apparatus ( Figure 5).
- RU signal in resonance unit
- MW Mapt2 means the molecular weight of Mapt2, equal to 27 kDa
- Mapt2 / FVII stoichiometry which is equal to 1.
- the expected maximum signal value was: 1820 RU.
- Mapt2 aptamers bound to a human Factor VII molecule is then calculated according to the formula: Measured Signal / Waited Signal, with:
- the percentage of Mapt2 aptamer molecules bound to a human FVII molecule at the end of the injection is 62%.
- Example 5 Kinetics of binding of the aptamer in human plasma FVII Mapt2 was manufactured a solid support on which are immobilized nucleic molecules of the aptamer of the invention of sequence SEQ ID N 0 86, also referred to herein as " Mapt2 ". Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules is available (S sensor chip SA series, GE)
- the solid support was contacted with the above aptamer compounds above in order to immobilize the nucleic acids of sequence SEQ ID N 0 86, by noncovalent association between the streptavidin molecules of the substrate and molecules of biotin aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 425 RU (1 RU corresponds approximately to 1 ⁇ g of immobilized product per mm 2 ).
- FVII HP Human FVII purified from plasma (FVII HP, purity: 99%) was diluted in running buffer (Tris 50 mM, NaCl 50 mM, CaCl 2 10 mM, MgCl 2 4 mM, pH 7.4) of to obtain four samples of concentration of FVII HP of 125, 250 (in duplicate), 500 nM and 100O mM.
- Each sample was injected sequentially on the same chip (solid support) containing the aptaptin Mapt2 immobilized by a biotin-streptavidin interaction. Controls are obtained by injecting whites containing only the race buffer. All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec. After the injection, the stroke buffer was injected onto the chip at the same rate for 120 sec. Stamp elution (EDTA, 20 mM) was then injected for 75 sec with a flow rate of 30 ⁇ l / min to unhook the FVII HP from the aptamer.
- EDTA 20 mM
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- the above solid support was brought into contact with the above aptamer compounds in order to immobilize the nucleic acids of sequence SEQ ID NO : 86, by non-covalent association between the streptavidin molecules of the support and the biotin molecules of aptamer compounds.
- a solid support was also constructed on which molecules of a biotinylated anti-FVII polyclonal antibody were immobilized.
- Solid supports with the Mapt2 aptamer or with the human anti-FVII polyclonal antibody consist of 96-well plates for ELISA assay;
- Example 7 Binding aptamers to different types of human factor VII
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the end coupled to the aptamer, has been coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules (S sensor Chip SA series, GE) was then added.
- the above solid support was then contacted with the aptamer compounds above to immobilize the nucleic acids of the present invention.
- sequence SEQ ID NO : 86 by non-covalent association between the streptavidin molecules of the support and the biotin molecules of the aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 4326 RU (1 RU corresponds approximately to 1 ⁇ g of immobilized product per mm 2 ).
- the part of the solid support on which Mapt2 is immobilized is called the active cell.
- any nucleic acid molecules we immobilized on any part of the solid support called the reference cell any nucleic acid molecules, with an immobilization rate of 4069 RU.
- Each sample was injected sequentially onto the same active cell (solid support) containing the aptaptin Mapt2 immobilized by a biotin-streptavidin interaction. Controls are obtained by injecting whites containing only the race buffer. Signals corresponding to the background noise are obtained by injecting the same samples on the reference cell containing any immobilized nucleic acids, these signals are deducted from the signals obtained on the active cell. All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec. After the injection, the stroke buffer was injected onto the chip at the same rate for 120 sec.
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules is available (S sensor chip SA series, GE)
- the solid support was contacted with the above aptamer compounds above in order to immobilize the nucleic acids of sequence SEQ ID N 0 86, by noncovalent association between the streptavidin molecules of the substrate and molecules of biotin aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 4326 RU (1 RU corresponds approximately to 1 ⁇ g of immobilized product per mm 2 ).
- the part of the solid support on which Mapt2 is immobilized is called the active cell.
- the reference cell any nucleic acid molecules, with an immobilization rate of 4069 RU.
- Each sample was injected sequentially on the same chip (solid support) containing the aptaptin Mapt2 immobilized by a biotin-streptavidin interaction. Controls are obtained by injecting whites containing only the race buffer. Signals corresponding to the background noise are obtained by injecting the same samples on the reference cell containing any immobilized nucleic acids, these signals are deducted from the signals obtained on the active cell. All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec, after the injection, the stroke buffer was injected on the chip at an identical rate for 120 sec.
- Elution buffer (EDTA, 15mM) was then injected for 30 sec with a flow rate of 30 ⁇ l / min to unhook the human FVII or rabbit aptamer ..
- the chip can study in real time training and breaking of interactions between FVII HP and the immobilized aptamer through surface plasmon resonance (SPR). A link on the immobilized aptamer results in an increase in the signal in resonance unit (RU) recorded by the apparatus ( Figure 8).
- SPR surface plasmon resonance
- the affinity support was made of a solid carrier material consisting of a matrix having grafted streptavidin (streptavidin-agarose - Novagen ®).
- a volume of 1 ml of gel was placed in a container consisting of a column (i.d., 1 mm). The gel was washed with purified water to remove the storage solvent
- the characteristics of the gel are: - Adsorption capacity of biotin: ⁇ 85 nanomole / ml of gel
- biotinylated anti-human FVII nucleic aptamers of sequence SEQ ID No. 86 are solubilized in purified water at the final concentration of 0.5 mg / 0.187 ml, ie a final molar concentration of 0.1 mM.
- the nucleic aptamer solution was activated at 95 ° C. according to the standard cycle, for the immobilization of the aptamers on the solid support material.
- the nucleic aptamer solution was previously diluted with 4.8 ml of purified water and then 1.5 ml of Me ++ buffer (5x concentrate).
- the absorbance detector is adjusted to 1 AUFS (Absorbance Unit FuII Scale) and the OD is recorded at 254 nm of this solution at 0.575 AU 254 .
- the aptamer affinity carriers were tested from a purified FVII / FVIIa preparation prepared according to the technique described in PCT Application No. WO2008 / 099077.
- the starting biological material is transgenic rabbit milk containing recombinant human FVII.
- the expression cassette comprises the human FVII transgene placed under the control of the ⁇ -casein gene promoter.
- the average amidolytic FVII titre (biologically activatable FVII) in the milk collected is 928 IU / ml.
- the milks are stored at a temperature of -80 ° C.
- the rabbit milks are thawed in a water bath at a temperature of 37 ° C. and are then diluted with a solution of sodium citrate for a final concentration. in citrate of 62 g / l at a pH of 7.5.
- the treatment with sodium citrate makes it possible to destabilize the phosphocalcic micelles of caseins.
- the lipid-rich protein solution of the milk is then clarified on a sequence of filters, respectively (i) filter depth of 15 to 0.5 ⁇ m porosity threshold and (i) 0.2 ⁇ m membrane filter.
- a quantity of 17.5 mg of low purity FVII (-5%) obtained at the end of the above step is purified by ion exchange chromatography, using a Q-sepharose® XL gel ( GE Healthcare) with a volume of 20 ml.
- the human FVII is eluted with a volume of 78 ml of buffer comprising 5 mM calcium chloride.
- Residual protein from rabbit milk is difficult to separate from
- FVII at this stage either because there are structure homologies such as GLA domain or EGF domain proteins, or physico-chemical homologies (ionic charge and / or near molecular size).
- structure homologies such as GLA domain or EGF domain proteins, or physico-chemical homologies (ionic charge and / or near molecular size).
- Conventional techniques allow up to 99.95% purity improvement by orthogonal techniques (combination of hydroxyapatite gel separation and size exclusion chromatography).
- orthogonal techniques combination of hydroxyapatite gel separation and size exclusion chromatography
- the exogenous protein load allowed for the genetic recombination proteins must not exceed 50 ppm, ie purity> 99.995%. Such purity only seems attainable after purification on an affinity matrix.
- a volume of 6 ml of the purified human FVII solution (1.1 mg of FVII) obtained at the end of the previous step is used for the purification step at a high level of purity of the recombinant human FVII with the support affinity of the invention.
- the FVII solution obtained in the preceding step is injected onto the Aptamer-agarose gel (affinity support) with a peristaltic pump at a flow rate of 0.1 ml / minute is a contact time with the 10-minute affinity support (I / O).
- the gel is washed in 50mM tris buffer + 5mM NaCl + 4mM MgCl 2 + 10mM CaCl 2 at pH 7.5.
- a volume of 10 ml of non-adsorbed solution is collected.
- FVII is eluted with 50mM tris buffer + 10mM EDTA pH 7.5.
- the collection of the elution peak is carried out according to the DO profile.
- the amount of immobilized nucleic aptamers in the affinity support is 17 nanomoles, which corresponds, for a mole to mole interaction with the FVII molecules, to an absolute capacity of the affinity support of 0. , 9 mg of FVII.
- Figure 11 illustrates a chromatographic profile of recombinant human FVII produced in rabbit milk, with continuous monitoring of absorbance (D.O.) values at 254 nanometers.
- the inflection (2) of the absorption curve after the moment of the injection (1) illustrates the beginning of the saturation of the affinity support with the recombinant human FVII.
- time (3) the injection of recombinant human FVII is stopped.
- the duration between the injection start time (1) and the injection end time (2) is 10 minutes.
- the affinity support continues to saturate with the coagulation protein of interest: complexes between (i) the anti-nucleic aptamers FVII of the affinity support and (ii) the recombinant human FVII molecules initially contained in the composition to be purified were formed.
- a washing step (6) of the column is carried out with the washing buffer specified above. Then the elution step is carried out by injection at the time (4) of the buffer solution comprising a final concentration of 10 mM EDTA.
- the absorption peak illustrates the release of recombinant human FVII from recombinant nucleic Aptamer / FVII complexes. It is noted that the recombinant human FVII molecules are released rapidly and therefore in a small volume. Therefore, thanks to the affinity support of the invention, a high concentration elution solution of recombinant human FVII protein is obtained.
- a step of regeneration of the affinity support was carried out with a 50 mM Tris buffer.
- the visible absorbance peak in (7) corresponds to the substances released from the affinity support due to the regeneration step
- Dynamic absorption capacity of the affinity support Table 1 below presents the results of the test, which show a dynamic adsorption capacity of 0.45 to 0.49 mg / ml of the affinity matrices 50 55% bio-available ligands.
- Dynamic elution yield (for "Dynamic Elution”); which represents the ratio between the recombinant FVII eluted and the recombinant FVII adsorbed, expressed as a percentage Specific separation capacity of the affinity support
- the affinity supports were evaluated for specificity by a specific ELISA assay for rabbit milk proteins.
- Example 10 illustrate the excellent characteristics of the Aptamer agarose gel affinity carriers with a dynamic adsorption capacity of at least 1 mg of FVII per mg of ligand with an elution efficiency of at least 75%. Specificity is also well established with a clear improvement in purity (-99.95%), elimination of 2 log 10 of residual rabbit milk protein RMPs. The final rate is about 500 ppm on these 2 non-optimized trials.
- Example 11 Capturing Aptameric Nucleic Acids According to the Invention with Human Factor VII / VIIa Immobilized on a Support A solid support was made on which were immobilized plasma purified human Vll / VIIa molecules of plasma origin.
- Human Factor VII is immobilized on NHS-EDC-activated dextran carboxymethyl and binding to the free amines present on FVII / VIIa.
- the human factor VII / VIIa is thus immobilized with a immobilization rate of 2525.
- a series of 27 nucleic aptamers of the invention (purity: 99%), ranging in length from 43 to 66 nucleotides depending on the aptamers, were diluted in running buffer
- Each sample was injected sequentially on the same chip (solid support) containing the immobilized human FVII. Controls are obtained by injecting whites containing only the race buffer. All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec. After the injection, the stroke buffer was injected onto the chip at the same rate for 120 sec. Elution buffer (EDTA, 5mM) was then injected for 60 sec with a flow rate of 30 ⁇ l / min to unhook the aptamer from immobilized human FVII.
- the chip makes it possible to study in real time the formation and the rupture of the interactions between the immobilized human FVII and each of the aptamers tested, thanks to the surface plasmon resonance (RPS).
- a link on the immobilized human FVII results in an increase in the signal in resonance unit (RU) recorded by the device ( Figure E1).
- RU signal in resonance unit
- Figure E1 These analyzes are performed with the RPS Biacore T100 (GE) device. The modeling of recorded interactions is done using the Biaevaluation (GE) Software.
- Figure 12 illustrates the binding curves of a series of 27 nucleic aptamers of the invention to human plasma Factor VII immobilized on a support, in a test according to the surface plasmon resonance technique.
- the abscissa the time, expressed in seconds; ordinate, resonance signal, expressed in arbitrary resonance units.
- FIG. 13 illustrates the individual values of the stable attachment signal of each of the
- Mapt2 Human VII. Mapt2 "core sequence" is in the weak affinity group. A representative of family 2 has a very superior affinity to others. This aptamer is named Mapt 2.2 and has the following "core sequence”: ⁇ 'CCGCACGCTACGCGCATGAACCCGCGCACACGACTTGAAGTAGCS '(SEQ ID NO: 33) The results obtained nevertheless show that all tested nucleic aptamers bind with a significant affinity to plasma human factor VII.
- Example 12 Method for Purifying Human Plasma Factor VII A. Materials and Methods
- the aptamer used is the aptamer of sequence SEQ ID NO : 20.
- This starting material comprises impurities, truncated forms of Factor VII and degraded forms of Factor VII.
- a degraded form of Factor VII may comprise a form of Factor VII, the gamma-carboxylation of which is impaired.
- Figure 14 shows the curve of measured values of absorbance at 280 nm versus time.
- peak # 1 is the fraction of the starting material that was not retained on the column.
- Peak No. 2 corresponds to the elution fraction.
- lane no. 1 corresponds to the fraction of the starting material and lane no. 2 to the elution fraction. Despite the high purity of the starting material, it is found that the eluted fraction no longer contains contaminant or degraded forms
- the aptamer used is the sequence SEQ ID N aptamer 0 86
- the fractions are analyzed for their amidolytic activity in chromogenic assay using a Stago kit according to the supplier's recommendations (Kit Factor VIIa StatClot).
- the amidolytic activity is then converted into ⁇ g of FVII contained in said fraction.
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules is available (S sensor chip SA series, GE)
- the solid support was contacted with the above aptamer compounds above in order to immobilize the nucleic acids of sequence SEQ ID N 0 86, by noncovalent association between the streptavidin molecules of the substrate and molecules of biotin aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 3772 RU (1 RU corresponds to approximately 1 ⁇ g of immobilized product per mm 2 ).
- Transgenic human FVII resulting purified from transgenic rabbit milk (FVII HPTG, purity: 98%) was diluted in running buffer (Tris 50 mM, NaCl 50 mM, CaCl 2 10 mM, MgCl 2 4 mM, pH 7.4) so as to obtain a sample of concentration 20 mM FVII.
- the sample was injected onto the chip (solid support) containing the aptaptin Mapt2 immobilized by a biotin-streptavidin interaction. Then, buffers of increasing concentration of NaCl were injected onto the solid support (3 injection series ranging from 1 M NaCl to 3 M NaCl). All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec after the injection. After the 3 sets of injection with the 3 buffers containing NaCl, elution buffer (EDTA, 1 OmM) was then injected for 75 sec with a flow rate of 30 ⁇ l / min to unhook the FVII HPTG from the aptamer.
- elution buffer EDTA, 1 OmM
- mapping of the immobilized aptamer Mapt2 to transgenic human FVII were calculated with the dedicated module of the software Biacore® control Software, version 1.2.
- Mapt2 aptamer binding results to human FVII determined that binding of Mapt2 aptamer to human FVII was not impaired by injection of NaCl-containing buffers.
- EXAMPLE 15 Specific Embodiments of a Human Factor VII Interaction Protocol with an aptamer on Biacore (Propylene Glycol Resistance) A. Materials and Methods
- a solid support was made on which were immobilized molecules of the nucleic aptamer of the invention of sequence SEQ ID NO : 86, also referred to herein as "Mapt2".
- Mapt2 Prior to its attachment to the solid support, the 5 'end of the aptamer Mapt2 was chemically coupled to a spacer chain consisting of 4 molecules of PEG (IC 8). Then, the free end of the spacer chain, opposite to the aptamer coupled end, was coupled to a biotin molecule.
- a solid support containing immobilized streptavidin molecules is available (S sensor chip SA series, GE)
- the solid support was contacted with the above aptamer compounds above in order to immobilize the nucleic acids of sequence SEQ ID N 0 86, by noncovalent association between the streptavidin molecules of the substrate and molecules of biotin aptamer compounds.
- the aptamer Mapt2 is thus immobilized with a immobilization rate of 5319 RU (1 RU corresponds to approximately 1 ⁇ g of immobilized product per mm 2 ).
- Purified transgenic human FVII obtained from transgenic rabbit milk (FVII)
- HPTG, purity: 98%) was diluted in running buffer (50mM Tris, 10mM CaCl 2 , 4mM MgCl 2 , pH 7.4) to obtain a 20mM FVII concentration sample.
- the sample was injected onto the chip (solid support) containing the aptaptin Mapt2 immobilized by a biotin-streptavidin interaction. Then, a buffer containing 50% propylene glycol was injected onto the solid support. All injections were performed with a flow rate of 30 ⁇ l / min for 60 sec after the injection. After injection with the buffer containing 50% propylene glycol, elution buffer (EDTA, 10 mM) was then injected for 75 sec with a flow rate of 30 ⁇ l / min to unhook the FVII HPTG from the aptamer.
- EDTA elution buffer
- mapping of the immobilized aptamer Mapt2 to transgenic human FVII were calculated with the dedicated module of the software Biacore® control Software, version 1.2.
- Mapt2 aptamer binding results to human FVII determined that binding of Mapt2 aptamer to human FVII was not impaired by injection of the propylene glycol-containing buffer.
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Abstract
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Priority Applications (8)
Application Number | Priority Date | Filing Date | Title |
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CA2753169A CA2753169A1 (fr) | 2009-02-19 | 2010-02-19 | Acides nucleiques se liant specifiquement au facteur vii/viia humain, et utilisations |
BRPI1008881A BRPI1008881A2 (pt) | 2009-02-19 | 2010-02-19 | ácido nucleico, composto, complexo, suporte para a imobilização do fator vii/viia humano, processos para imobilização do fator vii/viia humano sobre um suporte, para a purificação do fator vii/viia humano e para a detecção da presença de fator vii/viia humano em uma amostra, composição farmacêutica, e, utilização de um ácido nucleico |
JP2011550635A JP2012517825A (ja) | 2009-02-19 | 2010-02-19 | ヒト因子VII/VIIaに特異的に結合する核酸と、その使用 |
CN201080014904XA CN102365293A (zh) | 2009-02-19 | 2010-02-19 | 特异性结合人因子VII/VIIa的核酸及其用途 |
US13/201,983 US20120041056A1 (en) | 2009-02-19 | 2010-02-19 | Nucleic acids specifically binding with human factor vii/viia and uses thereof |
EP10709892A EP2398816A1 (fr) | 2009-02-19 | 2010-02-19 | ACIDES NUCLEIQUES SE LIANT SPECIFIQUEMENT AU FACTEUR VII/VIIa HUMAIN, ET UTILISATIONS |
AU2010215302A AU2010215302B2 (en) | 2009-02-19 | 2010-02-19 | Nucleic acids specifically binding with human factor VII/VIIa and uses thereof |
IL214565A IL214565A (en) | 2009-02-19 | 2011-08-09 | Nucleic acids that are specifically linked to the human factor viia / vii, their use and pharmaceutical preparations that contain them |
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FR0951082A FR2942231B1 (fr) | 2009-02-19 | 2009-02-19 | Acides nucleiques se liant specifiquement au facteur vii/viia humain, et utilisations |
FR0951082 | 2009-02-19 |
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PCT/FR2010/050291 WO2010094899A1 (fr) | 2009-02-19 | 2010-02-19 | ACIDES NUCLEIQUES SE LIANT SPECIFIQUEMENT AU FACTEUR VII/VIIa HUMAIN, ET UTILISATIONS |
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US (1) | US20120041056A1 (fr) |
EP (1) | EP2398816A1 (fr) |
JP (1) | JP2012517825A (fr) |
KR (1) | KR20110127662A (fr) |
CN (1) | CN102365293A (fr) |
AU (1) | AU2010215302B2 (fr) |
BR (1) | BRPI1008881A2 (fr) |
CA (1) | CA2753169A1 (fr) |
FR (1) | FR2942231B1 (fr) |
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Cited By (2)
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WO2011012830A1 (fr) * | 2009-07-31 | 2011-02-03 | Lfb Biotechnologies | Procede pour la purification de proteines de la coagulation a domaine gla |
WO2011012831A1 (fr) * | 2009-07-31 | 2011-02-03 | Lfb Biotechnologies | Procede pour la purification de proteines de la coagulation a domaine gla actives |
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EP0346241A1 (fr) | 1988-06-09 | 1989-12-13 | Fondation Nationale De Transfusion Sanguine | Procédé de préparation d'une fraction concentrée en facteur Vlla et son application à titre de médicament |
EP0527063A1 (fr) | 1991-06-12 | 1993-02-10 | Institut National De La Recherche Agronomique | Production d'une protéine d'intérêt dans le lait d'un mammifère transgènique |
EP0547932A1 (fr) | 1991-12-16 | 1993-06-23 | Association D'aquitaine Pour Le Developpement De La Transfusion Sanguine Et Des Recherches Hematologiques | Procédé de fabrication d'un concentré de facteur VII activé de haute pureté |
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US20030175703A1 (en) * | 2000-09-26 | 2003-09-18 | Sullenger Bruce A. | RNA aptamers and methods for identifying the same |
WO2004047742A2 (fr) | 2002-11-21 | 2004-06-10 | Archemix Corporation | Agents therapeutiques aptameres multivalents possedant des proprietes pharmacodynamiques ameliorees et des procedes de preparation et d'utilisation de ceux-ci |
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EP1739170A2 (fr) | 1994-09-21 | 2007-01-03 | American National Red Cross | Animaux transgéniques exprimant le facteur VIII de coagulation chez l'homme et le facteur von Willebrand |
WO2007032359A1 (fr) | 2005-09-12 | 2007-03-22 | National University Corporation Tokyo University Of Agriculture And Technology | Procédé de détection d'une molécule cible à l'aide d'un complexe aptamère/sonde |
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2009
- 2009-02-19 FR FR0951082A patent/FR2942231B1/fr not_active Expired - Fee Related
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- 2010-02-19 CN CN201080014904XA patent/CN102365293A/zh active Pending
- 2010-02-19 US US13/201,983 patent/US20120041056A1/en not_active Abandoned
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- 2010-02-19 WO PCT/FR2010/050291 patent/WO2010094899A1/fr active Application Filing
- 2010-02-19 KR KR1020117019400A patent/KR20110127662A/ko not_active Application Discontinuation
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WO2011012830A1 (fr) * | 2009-07-31 | 2011-02-03 | Lfb Biotechnologies | Procede pour la purification de proteines de la coagulation a domaine gla |
WO2011012831A1 (fr) * | 2009-07-31 | 2011-02-03 | Lfb Biotechnologies | Procede pour la purification de proteines de la coagulation a domaine gla actives |
CN102666857A (zh) * | 2009-07-31 | 2012-09-12 | Lfb生物技术公司 | 纯化活性gla结构域凝固蛋白的方法 |
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US9359610B2 (en) | 2009-07-31 | 2016-06-07 | Laboratoire Français Du Fractionnement Et Des Biotechnologies | Method for purifying GLA-domain coagulation proteins |
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US9850477B2 (en) | 2009-07-31 | 2017-12-26 | Laboratoire Francais Du Fractionnement Et Des Biotechnologies | Method for purifying active GLA-domain coagulation proteins |
Also Published As
Publication number | Publication date |
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CA2753169A1 (fr) | 2010-08-26 |
IL214565A0 (en) | 2011-09-27 |
US20120041056A1 (en) | 2012-02-16 |
AU2010215302B2 (en) | 2015-05-28 |
JP2012517825A (ja) | 2012-08-09 |
FR2942231B1 (fr) | 2015-03-20 |
IL214565A (en) | 2015-09-24 |
CN102365293A (zh) | 2012-02-29 |
AU2010215302A1 (en) | 2011-09-08 |
KR20110127662A (ko) | 2011-11-25 |
FR2942231A1 (fr) | 2010-08-20 |
BRPI1008881A2 (pt) | 2016-03-15 |
EP2398816A1 (fr) | 2011-12-28 |
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