WO2021170963A1 - Méthode d'identification de composés utiles pour le traitement d'un cancer - Google Patents
Méthode d'identification de composés utiles pour le traitement d'un cancer Download PDFInfo
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- WO2021170963A1 WO2021170963A1 PCT/FR2021/050335 FR2021050335W WO2021170963A1 WO 2021170963 A1 WO2021170963 A1 WO 2021170963A1 FR 2021050335 W FR2021050335 W FR 2021050335W WO 2021170963 A1 WO2021170963 A1 WO 2021170963A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/68—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- 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
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4747—Apoptosis related proteins
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K19/00—Hybrid peptides, i.e. peptides covalently bound to nucleic acids, or non-covalently bound protein-protein complexes
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/0004—Oxidoreductases (1.)
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/574—Immunoassay; Biospecific binding assay; Materials therefor for cancer
Definitions
- the invention relates to a method of identifying compounds useful for the treatment of cancer, based on the evaluation of the ability of the compound to modulate the interaction between the AIF protein and the CHCHD4 protein.
- Mitochondria are major players in cell metabolism via, among other things, their ability to produce ATR, produce different metabolites and macromolecules, produce and detoxify reactive oxygen species and modulate cell death. For this reason, targeting mitochondrial activity in order to affect the metabolism of cancer cells is an avenue of interest in the treatment of cancers. However, the mitochondrial molecular mechanisms likely to provide therapeutic benefit have yet to be determined.
- AIF Apoptosis Inducing Factor
- CHCHD4 coiled-coil-helix-coiled-coil-helix domain containing 4
- the inventors have developed an identification method, based on the evaluation of the capacity of a compound to inhibit the interaction between the protein.
- AIF and the CHCHD4 protein The hypothesis of the inventors would be that a compound inhibiting the formation of the complex AIF / CHCHD4 would be able to affect cancer cells whose survival and proliferation depend on mitochondrial activity.
- the method developed by the inventors has proved to be particularly effective since it has made it possible to identify compounds having anti-cancer properties.
- the present method has the advantage of being applicable to high throughput screening, thereby facilitating the identification of compounds potentially useful for the treatment of cancer.
- One aspect of the invention therefore relates to a method of identifying a compound potentially useful for the treatment of cancer, characterized in that it comprises the evaluation of the capacity of said compound to inhibit the interaction between the protein AIF and the CHCHD4 protein, said compound being identified as potentially useful for the treatment of cancer if it inhibits said interaction.
- the method comprises:
- the compound is identified as potentially useful for the treatment of cancer if it inhibits by at least 50%, 60%, 70%, 80%, or at least 90% the interaction between the AIF protein and the CHCHD4 protein.
- the interaction between the AIF protein and the CHCHD4 protein can be measured by means of a homogeneous amplified luminescence proximity assay (ALPHA) or a surface plasmon resonance (SPR) assay.
- APHA amplified luminescence proximity assay
- SPR surface plasmon resonance
- the method according to the invention can comprise the confirmation, in a cell or non-human animal model of cancer, of the anticancer properties of the identified compound.
- the method comprises:
- kits for the identification of a compound potentially useful for the treatment of cancer characterized in that it comprises:
- Means suitable for measuring the interaction between the AIF protein and the CHCHD4 protein can be means suitable for a homogeneous amplified luminescence proximity test (ALPHA).
- the buffer suitable for the experiment measuring the interaction between the AIF protein and the CHCHD4 protein comprises phosphate buffered saline (PBS) and bovine serum albumin (BSA).
- said compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein consists of the sequence of SEQ ID NO: 4 or any functional variant having at least 70%, 80%, 90%, or at least 99% identity with the sequence of SEQ ID NO: 4.
- FIG. 1 AIF103-613 and CHCHD4 titration by Alphascreen.
- the titration of the CHCHD4 protein against the AIF 103 -613 protein by the ALPHAscreen technology leads to a bell-shaped response called the Hook effect.
- Figure 2 Inhibition of the interaction of AIF103-613 / CHCHD4.
- TH mean (negative control signal) - 5 * SD (negative control signal).
- the Y axis corresponds to the normalized signal , that is, the signal calculated as a percentage of the mean.
- Figure 3 SPR analysis of the compounds identified by Alphascreen.
- A Validation by SPR of thioridrazine and mitoxantrone using the Alphascreen test as inhibitors of the AIF 103-613 / CHCHD4 interaction.
- the 10 ⁇ M compounds were incubated for 20 min with AIF in DPBS at pH 7.4 at room temperature. Then, the mixture was injected for 3 minutes at a rate of 30 ⁇ L per minute on the CHCHD4 protein.
- the 3 ⁇ M N27 peptide served as a positive control.
- One aspect of the invention relates to a method of identifying a compound potentially useful for the treatment of cancer, characterized in that it comprises evaluating the ability of a compound to inhibit the interaction between AIF protein and the CHCHD4 protein, said compound being identified as potentially useful for the treatment of cancer if it inhibits said interaction.
- One aspect of the invention relates in particular to a method of screening a library of compounds to identify a compound potentially useful for the treatment of cancer, characterized in that it comprises the evaluation of the capacity of the compounds of said library compounds to inhibit the interaction between the AIF protein and the CHCHD4 protein, said compounds being identified as potentially useful for the treatment of cancer if they inhibit said interaction.
- the method according to the invention comprises:
- the protein AIF (for "Apoptosis Inducing Factor") is a flavoprotein present in the mitochondria and which promotes apoptosis when it is released from the mitochondria.
- the AIF protein can be of any origin, preferably of animal origin, in particular a mammal, more preferably of human origin.
- the AIF protein corresponds to the natural human AIF protein whose NCBI sequence reference is “NP 004199.1”, or any functional variant thereof such as AIF2 which is a specific brain isoform.
- the AIF protein according to the invention can correspond to the natural human polypeptide of sequence SEQ ID NO: 1, or any functional variant.
- the expression "functional variant” which refers to the AIF protein denotes any polypeptide derived from the structure of the AIF protein and retaining the capacity for binding to the CHCHD4 protein, in particular to the CHCHD4 protein of SEQ ID NO: 2.
- the functional variants can be natural or synthetic variants such as fragments, mutants or deletants.
- the functional variant of the AIF protein corresponds to a polypeptide having a sequence identity of at least 50%, 60%, 70%, 80%, 90%, or at least 95% with the AIF protein of sequence SEQ ID NO: 1.
- the CHCHD4 protein (also called “mitochondrial intermembrane space import and assembly protein 40” or “MIA40”) is a protein which participates in protein import into the intermembrane space of the mitochondria.
- the CHCHD4 protein can be of any origin, preferably of animal origin, in particular a mammal, more preferably of human origin.
- the CHCHD4 protein corresponds to the natural CHCHD4 protein human whose NCBI sequence reference is "NR 001091972.1".
- the CHCHD4 protein according to the invention can correspond to the natural human polypeptide of sequence SEQ ID NO: 2 or any functional variant.
- the expression “functional variant” which refers to the CHCHD4 protein denotes any polypeptide derived from the structure of the CHCHD4 protein and retaining the capacity for binding to the AIF protein, in particular to the AIF protein of SEQ ID NO: 1.
- the variants functional can be natural or synthetic variants such as fragments, mutants or deletants.
- the functional variant of the CHCHD4 protein corresponds to a polypeptide having a sequence identity of at least 50%, 60%, 70%, 80%, 90%, or at least 95% with the CHCHD4 protein of sequence SEQ ID NO: 2.
- the functional variant of the AIF protein is deleted or truncated relative to the AIF protein of SEQ ID NO: 1.
- the functional variant of the AIF protein can correspond to a polypeptide of which the transmembrane part. of the AIF protein was deleted.
- the functional variant of the AIF protein corresponds to a polypeptide of sequence SEQ ID NO: 3, or to a polypeptide having a sequence identity of at least 50%, 60%, 70%, 80% , 90%, or at least 95% with the polypeptide of sequence SEQ ID NO: 3.
- the AIF and CHCHD4 proteins can be modified, as long as this does not prevent the interaction between the two proteins.
- the AIF and / or CHCHD4 proteins can be fused to a fragment serving as a label (or "tag").
- Any conventional label can be used, as long as it does not prevent the interaction between the two proteins.
- any label suitable for a homogeneous amplified luminescence proximity assay (ALPHA) or a surface plasmon resonance (SPR) assay can be used.
- the AIF and / or CHCHD4 proteins can be fused to a Histidine tag corresponding to a motif made up of several histidine residues, or to a GST tag corresponding to the glutathione-S-transferase protein.
- the compounds capable of being identified by the process of the invention can be compounds of various nature, structure and origin.
- Compounds likely to be identified can in particular be biological, chemical, synthetic compounds, etc. They can in particular be compounds of nucleic, peptide, lipid or carbohydrate nature. They may also be banks, in particular chemical libraries, banks of proteins, peptides, nucleic acids or natural substances, etc.
- the compound to be tested can be brought into contact with the AIF protein and the CHCHD4 protein in any suitable support and in particular on a plate, in a tube or a flask, a membrane, etc.
- the bringing into contact can be carried out in a multi-well plate which allows numerous and varied tests to be carried out in parallel.
- typical supports are microtiter plates and more particularly 96 or 384 well (or more) plates, easy to handle.
- the amount (or concentration) of test compound can be adjusted by the user depending on the type of compound, the length of the incubation period, etc.
- the concentration of the compound to be tested can vary from 1nM to 1MM. It is of course possible to test other concentrations without deviating from the present invention.
- Each compound can, moreover, be tested, in parallel, at different concentrations.
- the amount (or concentration) of AIF and CHCHD4 proteins can vary and be adjusted by the user. In particular, the concentration of AIF and CHCHD4 proteins is adjusted to allow optimal interaction between the two proteins, in the absence of the compound to be tested.
- the contact between the proteins and the compound to be tested can be maintained for example between a few minutes and several hours or days, particularly between 30 minutes and 72 hours, more particularly between 1 and 5 hours.
- test compound can be pre-incubated with the AIF protein, for a certain period of time, before being brought into contact with the CHCHD4 protein.
- test compound can be preincubated with the CHCHD4 protein, for a certain period of time, before being brought into contact with the AIF protein.
- duration of the pre-incubation with either protein perhaps a few minutes, or several hours or days, more particularly between 5 and 60 minutes, more particularly between 5 and 30 minutes.
- the interaction of the AIF and CHCHD4 proteins, in the presence or absence of the test compound, can be measured using any technique known to those skilled in the art making it possible to measure or quantify the interaction between two proteins.
- interaction means the association or physicochemical bond between the two proteins.
- the interaction between two proteins can result from covalent and / or non-covalent bonds.
- Non-covalent bonds include in particular electrostatic, ionic, hydrogen, hydrophobic bonds, as well as Van der Waals forces.
- the method according to the invention comprises measuring the interaction of the AIF and CHCHD4 proteins, on the one hand in the absence of the test compound, and on the other hand in the presence of the test compound.
- the two measurements can be carried out consecutively or simultaneously.
- the two interaction measures, in the presence or in the absence of the test compound are then compared.
- the compound is identified as potentially useful for the treatment of cancer if it inhibits by at least 20%, 30%, 40%, 50%, 60%, 70%, 80%, or at least 90% the interaction between the AIF protein and the CHCHD4 protein.
- the compound is identified as potentially useful for the treatment of cancer if it inhibits by at least 50%, 60%, 70%, 80%, or at least 90% the interaction between the protein AIF and the CHCHD4 protein.
- the compound is identified as potentially useful for the treatment of cancer if it inhibits by at least 50% the interaction between the AIF protein and the CHCHD4 protein.
- the measurement of the interaction of the AIF and CHCHD4 proteins in the presence or in the absence of the test compound can be carried out by means of any technique which makes it possible to measure or quantify the interaction between two proteins, for example by means of '' a homogeneous amplified luminescence proximity test (ALPHA), a surface plasmon resonance (SPR) test, a thermal shift assay (TSA) method, an immunoprecipitation method, a test isothermal calorimetric titration (ITC), a fluorescence resonance energy transfer test (FRET), a polarization test of fluorescence or an ELISA test.
- ALPHA homogeneous amplified luminescence proximity test
- SPR surface plasmon resonance
- TSA thermal shift assay
- ITC test isothermal calorimetric titration
- FRET fluorescence resonance energy transfer test
- polarization test of fluorescence or an ELISA test a polarization test of fluorescence or an ELISA test.
- the technique for measuring the interaction of AIF and CHCHD4 proteins is applicable to high throughput screening.
- the ALPHA technology also known under the trade names AlphaScreen® and AlphaLISA®, makes it possible to measure the interaction of two molecules bio-conjugated with donor beads and acceptor beads.
- the donor beads contain a photosensitive molecule, such as phthalocyanine, which converts ambient oxygen to singlet oxygen after excitation at 680 nm. Singlet oxygen can diffuse up to about 200 nm in solution. If an acceptor bead is in this distance, energy is transferred from singlet oxygen to thioxene derivatives in the acceptor bead, resulting in light emission at 520-620nm (AlphaScreen®) or at 615nm (AlphaLISA®).
- the singlet oxygen returns to ground state and no luminescent signal is produced.
- one protein is conjugated to the donor beads, and the other protein is conjugated to the acceptor beads.
- the donor bead is brought close to the acceptor bead, and the excitation of the donor bead leads to the emission of a quantifiable light signal from the acceptor bead.
- the light signal is measured using a reader compatible with ALPHA technology such as the plate reader EnVision® or EnSpire®.
- the interaction is measured by means of the AlphaScreen® test.
- the test compound is identified as potentially useful for the treatment of cancer if the measurement of the light signal is lower in the presence of said compound than in the absence of said compound.
- the compound is identified as potentially useful for the treatment of cancer if it inhibits by at least 20%, 30%, 40%, 50%, 60%, 70%, 80%, or at least 90% the light signal measured in the absence of the compound to be tested.
- the compound is identified as potentially useful for the treatment of cancer if it inhibits by at least 50%, 60%, 70%, 80%, or at least 90% the light signal measured in l absence of the test compound.
- the compound is identified as potentially useful for the treatment of cancer if it inhibits by at least 50% the light signal measured in the absence of the test compound.
- the AIF protein can be conjugated to the donor bead and the CHCHD4 protein to the acceptor bead, and vice versa: the AIF protein can be conjugated to the acceptor bead and the CHCHD4 protein to the donor bead.
- the donor beads and the acceptor beads are covered with molecules or functional groups allowing their conjugation with one or the other of the AIF or CHCHD4 proteins.
- the proteins can be fused to tags allowing their conjugation on the donor or acceptor beads.
- the AIF protein or the CHCHD4 protein can be fused to a histidine tag allowing its conjugation on a nickel coated bead, or to a GST tag allowing its conjugation on a glutathione coated bead.
- the method comprises:
- the measurement of the interaction of the AIF and CHCHD4 proteins in the presence or in the absence of the compound to be tested is measured by means of a surface plasmon resonance (SPR) test such as the Biacore® test.
- SPR surface plasmon resonance
- one of the two proteins is attached to a surface (sensor chip), while the other is delivered to the surface via a continuous flow of buffer using a microfluidic system.
- the interaction of proteins is followed by surface plasmon resonance, which detects changes in mass at the surface.
- steps of contacting (a), measuring the interaction (b) and comparing (c) of the method of the invention as described above can be repeated.
- steps (a), (b), (c) can be repeated using, for each repetition, the same technique for measuring the interaction between the AIF and CHCHD4 proteins, or a different measurement technique.
- Repeating steps (a), (b), (c) has the advantage of refining the screening process and confirming the ability of the compound to inhibit the interaction between the AIF and CHCHD4 proteins.
- steps (a), (b), (c) can be carried out in duplicate, triplicate, quadruplicate or quintuplicate.
- steps (a), (b), (c) of the method of the invention can be repeated using the same technique for measuring protein interaction, for example ALPHA technology, but varying, for each repetition, the concentration of the compound to be tested.
- Varying the concentration of the compound to be tested has the advantage of specifying the inhibitory capacities of the compound identified, for example by determining the effect-dose relationship of the compound. Measuring the interaction of the AIF and CHCHD4 proteins, by varying the concentration of the compound to be tested makes it possible in particular to determine the median inhibitory concentration (050) of said compound. The 050 gives an indication of the concentration of the compound necessary to inhibit by 50% the interaction between the proteins AIF and CHCHD4 and thus makes it possible to evaluate the effectiveness of said compound in inhibiting the interaction.
- the method comprises:
- the method comprises in this order:
- steps (a), (b), (c) as described above in which the interaction of the AIF and CHCHD4 proteins is measured by means of an ALPHA test by a screening experiment at high throughput using a library of compounds to be tested;
- the method of the invention comprises carrying out steps (a), (b), (c) as described above, in which the compound is a compound capable of inhibiting l interaction between the AIF protein and the CHCHD4 protein.
- the use of a compound to inhibit the interaction between the AIF protein and the CHCHD4 protein can thus serve as a positive control, allowing the experiment to be validated.
- said compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein consists of the sequence of SEQ ID NO: 4, or consists of the sequence of SEQ ID NO: 4 or any functional variant having at least 70%, 80%, 90%, or at least 99% identity with the sequence of SEQ ID NO: 4.
- functional variant is here understood any variant of the sequence SEQ ID NO: 4 capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein.
- said compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein is selected from the group consisting of: disulfiram, bromocriptine or one of its salts such as bromocriptine mesylate, thioridazine or one of its salts such as thioridazine hydrochloride, Chicago sky blue 6B, mitoxantrone or one of its salts such as mitoxantrone dihydrochloride, rifapentine, tetraethylenepentamine or one of its salts such as tetraethylenepentamine pentachlorhydrate, nisoldipine, merbromine, thiethylperazine or one of its salts such as thiethylperazine dimalate and benidipine or one of its salts such as benidipine hydrochloride.
- the method of the invention comprises a step of comparison of the inhibition of the interaction of the AIF and CHCHD4 proteins obtained in the presence of the compound to be tested and of the inhibition of the interaction obtained in the presence of the compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein.
- the compound is identified as potentially useful in the treatment of cancer if the inhibition obtained with the compound corresponds to at least 30%, 40%, 50%, 60%, 70%, 80% or at least. less 90% of the inhibition obtained with the positive control, namely with the N27 peptide.
- the compound is identified as potentially useful in the treatment of cancer if the inhibition obtained with the compound corresponds to at least 50% of the inhibition obtained with the positive control, namely with the N27 peptide.
- the method of the invention further comprises a step of confirming, in a cell or non-human animal model of cancer, the anticancer properties of the compound identified as capable of inhibiting the interaction between the AIF proteins and CHCHD4.
- the method of the invention comprises a step of administering the compound identified in an animal model of cancer, then a step of analyzing the anticancer properties of said compound.
- Any animal model of cancer can be used, the animal preferably being a mammal.
- the animal can be a mouse, a rat, a pig, a rabbit, a chicken, or a non-human primate.
- the method of the invention comprises a step of bringing the compound identified into contact with a cell model of cancer, then a step of analyzing the cytotoxic properties of said compound.
- a cell model of cancer can be a two-dimensional (2D) or three-dimensional (3D) cultured cell model.
- Any cell model of cancer can be used, such as a cancer cell line.
- the identified compound can be contacted with the cancer lines A549, MCF7, or HCT116.
- kits for the identification of a compound potentially useful for the treatment of cancer characterized in that it comprises:
- the AIF protein can be of any origin, preferably of animal origin, in particular a mammal, more preferably of human origin.
- the AIF protein corresponds to the natural human AIF protein, the NCBI sequence reference of which is “NP 004199.1”, or any functional variant thereof.
- the AIF protein according to the invention can correspond to the natural human polypeptide of sequence SEQ ID NO: 1, or any functional variant, such as AIF2 which is a specific isoform of the brain.
- F “functional variant” which refers to the AIF protein denotes any polypeptide derived from the structure of the AIF protein and retaining the capacity for binding to the CHCHD4 protein, in particular to the CHCHD4 protein of SEQ ID NO: 2.
- Fes functional variants can be natural or synthetic variants such as fragments, mutants, or deletants.
- the functional variant of the AIF protein corresponds to a polypeptide having a sequence identity of at least 50%, 60%, 70%, 80%, 90%, or at least 95% with the AIF protein of sequence SEQ ID NO: 1.
- the CHCHD4 protein can be of any origin, preferably of animal origin, in particular a mammal, more preferably of human origin.
- the CHCHD4 protein corresponds to the natural human CHCHD4 protein, the NCBI sequence reference of which is “NR 001091972.1”.
- the CHCHD4 protein according to the invention can correspond to the natural human polypeptide of sequence SEQ ID NO: 2 or any functional variant.
- the expression “functional variant” which refers to the CHCHD4 protein denotes any polypeptide derived from the structure of the CHCHD4 protein and retaining the capacity for binding to the AIF protein, in particular to the AIF protein of SEQ ID NO: 1.
- the variants functional can be natural or synthetic variants such as fragments, mutants or deletants.
- the functional variant of the CHCHD4 protein corresponds to a polypeptide having a sequence identity of at least 50%, 60%, 70%, 80%, 90%, or at least 95% with the CHCHD4 protein of sequence SEQ ID NO: 2.
- the functional variant of the AIF protein is deleted or truncated relative to the AIF protein of SEQ ID NO: 1.
- the functional variant of the AIF protein can correspond to a polypeptide of which the transmembrane part. of the AIF protein was deleted.
- the functional variant of the AIF protein corresponds to a polypeptide of sequence SEQ ID NO: 3.
- the AIF and CHCHD4 proteins can be modified, as long as this does not prevent the interaction between the two proteins.
- the AIF and / or CHCHD4 proteins can be fused to a fragment serving as a label (or "tag"). Any conventional label can be used, as long as it does not prevent the interaction between the two proteins.
- the AIF and / or CHCHD4 proteins can be fused to a Histidine tag corresponding to a motif consisting of several histidine residues, or to a GST tag corresponding to the glutathione-S-transferase protein.
- AIF protein and the CHCHD4 protein any means, for example any reagent, compound, material, support or composition, necessary for the implementation of the measurement technique. the interaction between said proteins.
- the means suitable for measuring the interaction between the AIF protein and the CHCHD4 protein can be means suitable for any technique making it possible to measure or quantify the interaction between two proteins.
- the kit can include means adapted to a homogeneous amplified luminescence proximity test (ALPHA), a surface plasmon resonance (SPR) test, a thermal shift assay (TSA) method, an immunoprecipitation method, an isothermal calorimetric titration test (ITC) , a fluorescence resonance energy transfer (FRET) test, a fluorescence polarization test and / or an ELISA test.
- APHA homogeneous amplified luminescence proximity test
- SPR surface plasmon resonance
- TSA thermal shift assay
- ITC isothermal calorimetric titration test
- FRET fluorescence resonance energy transfer
- the means suitable for measuring the interaction between the AIF protein and the CHCHD4 protein are applicable to high throughput screening.
- the kit comprises means suitable for an ALPHA test and / or an SPR test.
- the kit comprises means suitable for measuring the interaction of the AIF and CHCHD4 proteins by an ALPHA test.
- the kit can include:
- - donor beads capable of emitting reactive oxygen species, such as singlet oxygen, when excited at a given wavelength, preferably around 680 nm;
- - acceptor beads capable of emitting a light signal, preferably between 520 nm and 620 nm, following the reaction with reactive oxygen species, such as singlet oxygen; the donor and acceptor beads further being able to conjugate with either AIF or CHCHD4 proteins.
- the donor beads and the acceptor beads are covered with molecules or functional groups allowing their conjugation with one or the other of the AIF or CHCHD4 proteins.
- the donor and acceptor beads can be covered with a layer of nickel, glutathione, streptavidin, protein A, G, L or antibodies.
- the donor beads are coated with nickel and the acceptor beads are coated with glutathione.
- the donor beads included in the kit are conjugated beforehand with one or the other of the AIF or CHCHD4 proteins.
- the acceptor beads included in the kit previously conjugated to one or the other of the AIF or CHCHD4 proteins.
- the donor and acceptor beads are beads obtained from the commercial Alphascreen® or Alphalisa® (Perkinelmer) test.
- the kit as described above can comprise a buffer suitable for the experiment measuring the interaction between the AIF protein and the CHCHD4 protein.
- buffer is meant any solution in which the AIF and CHCHD4 proteins are brought into contact, the test compound and optionally the means suitable for measuring the interaction of the proteins.
- the buffer is chosen so as not to inhibit the interaction between the AIF and CHCHD4 proteins.
- the buffer can also serve as a negative control when performing the method of the invention.
- the kit comprises a buffer suitable for an ALPHA test.
- the buffer comprises phosphate buffered saline (PB S) and bovine serum albumin (BSA).
- PB S phosphate buffered saline
- BSA bovine serum albumin
- the buffer comprises PBS and 0.1% BSA.
- the kit as described above can comprise a compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein.
- the compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein can thus serve as a positive control, making it possible to validate the experiment measuring the interaction between the AIF and CHCHD4 proteins, during the implementation of the method of the invention.
- said compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein consists of the sequence of SEQ ID NO: 4. or any functional variant having at least 70%, 80%, 90%, or at least 99% identity with the sequence of SEQ ID NO: 4.
- functional variant is meant here any variant of the sequence SEQ ID NO: 4 capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein.
- said compound capable of inhibiting the interaction between the AIF protein and the CHCHD4 protein is selected from the group consisting of: disulfiram, bromocriptine or one of its salts such as bromocriptine mesylate, thioridazine or one of its salts such as thioridazine hydrochloride, Chicago sky blue 6B, mitoxantrone or one of its salts such as mitoxantrone dihydrochloride, rifapentine, tetraethylenepentamine or one of its salts such as tetraethylenepentamine pentachlorhydrate, nisoldipine, merbromine, thiethylperazine or one of its salts such as thiethylperazine dimalate and benidipine or one of its salts such as benidipine hydrochloride.
- the kit as described above can further comprise any support suitable for the experiment of measuring the interaction between the AIF protein and the CHCHD4 protein.
- the support can be chosen from a plate, a tube, a flange, a membrane, etc.
- the support can be a multiwell plate, which makes it possible to carry out, in parallel, numerous and varied tests.
- the typical supports are microtiter plates and more particularly 96 or 384 well (or more) plates, easy to handle.
- An aspect of the invention further relates to the use of the kit as described above, in a method of identifying a compound potentially useful for the treatment of cancer.
- Another aspect of the invention relates to a pharmaceutical composition
- a pharmaceutical composition comprising a compound identified by the method as described above, in association with a pharmaceutically acceptable vehicle.
- one aspect of the invention relates to a pharmaceutical composition
- a pharmaceutical composition comprising a compound capable of inhibiting the interaction between the AIF and CHCHD4 proteins, in association with a pharmaceutically acceptable vehicle.
- pharmaceutically acceptable vehicle should be understood to mean any substance other than the active principle in a medicament. Its addition is intended to confer physicochemical and / or biochemical characteristics to promote oral, sublingual, respiratory, rectal, nasal, intestinal, parenteral administration, by intravenous injection, intraperitoneally, intramuscularly, subcutaneously, or other particular consistency or taste characteristics, to the final product, preferably avoiding covalent chemical interactions with the active principles.
- compositions of the invention can be in the form of simple or sugar-coated tablets, sublingual tablets, gelatin capsules, glossettes, capsules, tablets, injectable preparations, aerosols, nasal drops, suppositories, creams. , ointments or dermal gels.
- Another aspect of the invention relates to a compound identified by the method as described above, for its use as a medicament.
- one aspect of the invention relates to a compound capable of inhibiting the interaction between the AIF and CHCHD4 proteins, for its use as a medicament.
- one aspect of the invention relates to a compound identified by the method as described above, for its use in a method of treating cancer.
- one aspect of the invention relates to a compound capable of inhibiting the interaction between the AIF and CHCHD4 proteins, for its use in a method of treating cancer.
- the compound capable of inhibiting the interaction between the AIF and CHCHD4 proteins is selected from the group consisting of: Chicago sky blue 6b, rifapentine, nisoldipine, merbromine, thiethylperazine or one of its salts such as thiethylperazine dimalate, and benidipine or one of its salts such as benidipine hydrochloride.
- the method of treatment may comprise the administration of the compound capable of inhibiting the interaction between the AIF and CHCHD4 proteins or of the pharmaceutical composition comprising said compound, alone or in combination with any anti-cancer treatment such as radiotherapy, chemotherapy. and immunotherapy.
- the method of treatment may comprise the administration of said compound capable of inhibiting the interaction between the AIF and CHCHD4 proteins, in combination with the administration of a chemotherapeutic agent.
- the administration of the compound capable of inhibiting the interaction between the AIF and CHCHD4 proteins can be carried out before, simultaneously, or after the administration of the chemotherapeutic agent.
- chemotherapeutic agent is meant a chemical which can be used to destroy a cancer cell, or to slow, stop or reverse the growth of a cancer cell.
- the term “subject” or “patient” denotes an animal, preferably a mammal, in particular a human being, regardless of his age or sex, suffering from cancer.
- the term includes domestic animals as well as laboratory animals such as non-human primates, felines, canines, equines, pigs, cattle, goats, sheep, rabbits, rats and mice.
- the patient to be treated is a human being.
- the term "cancer” refers to any type of malignant tumor.
- the malignant tumor may be a primary tumor or a secondary tumor (i.e. metastasis).
- the tumor may correspond to a solid malignant tumor, which includes, for example, carcinomas, adenocarcinomas, sarcomas, melanomas, mesotheliomas, blastomas or cancer of blood cells such as leukemias, lymphomas and blood cells. myeloma. Cancer can for example correspond to cancer of the skin, lung, bladder, kidney, digestive cancer (colon, pancreas, liver), ovarian, brain, face and neck, etc.
- treatment includes curative and / or preventive treatment.
- Curative treatment refers to the reduction, amelioration, stabilization and / or elimination of a symptom of the disease, or the inhibition of the progression of a symptom of the disease.
- Preventive treatment refers to any of the following effects: preventing or delaying the onset of a given disorder, reducing the development, risk of development, incidence or severity of a disorder, increasing the time it takes to develop onset of symptoms and / or patient survival.
- Another aspect of the invention relates to the use in academic research of a compound identified by the method as described above, for its use as a compound for disrupting mitochondrial import and / or cell metabolism.
- said compound capable of inhibiting the interaction between the AIF protein and the protein CHCHD4 is selected from the group consisting of: disulfiram, bromocriptine or one of its salts such as bromocriptine mesylate, thioridazine or one of its salts such as thioridazine hydrochloride, Chicago sky blue 6B, mitoxantrone or a of its salts such as mitoxantrone dihydrochloride, rifapentine, tetraethylenepentamine or one of its salts such as tetraethylenepentamine pentachlorhydrate, nisoldipine, merbromine, thiethylperazine or one of its salts such as thiethhylpidiperazine dimalate or benedip
- the proteins AIF 103-613 fragment 103-613 of the protein AIF and CHCHD4 were produced in bacteria BL21 + DE3 (RIPL), via a 3 hour induction with 0.5 mM IPTG at 37 ° C. .
- the bacteria were transformed according to the recommendations of the supplier (Agilent).
- the proteins were then purified. Total protein concentration was determined by a Bradford assay kit. The purity of expression was also evaluated on polyacrylamide gel in the presence of SDS.
- a method for identifying compounds capable of inhibiting the interaction between AIF and CHCHD4 proteins and suitable for high throughput screening includes the use of:
- an AlphaScreen® kit comprising donor beads and acceptor beads capable of conjugating to the AIF and CHCHD4 proteins
- N27 peptide corresponding to the 27 amino acids of the N-ter end of the CHCHD4 protein, as described in Hangen et al, 2015;
- BSA bovine serum albumin
- PBS phosphate buffered saline
- the ALPHA assay was first performed at high throughput, using 384-well white microplates (Greiner, part number 781075), using 25 ⁇ L of total volume per well. Proteins, positive control and beads were diluted in 0.1% BSA / PBS solution. All distributions were performed with an electronic multipette, then the plates were centrifuged (200 g, 1 min). The plates were sealed and incubated in the dark in a room at 23 ° C.
- a library of 1,280 small molecules supplied by Prestwick Chemicals was screened.
- This bank includes compounds with various chemical and pharmacological properties, which are already approved by health agencies such as the FDA (Food and Drug Administration) or 1 ⁇ MEA (European Medicines Evaluation Agency).
- Each compound in the library is diluted in a 0.1% DMSO solution and used at a concentration of 10 ⁇ M.
- Second, 5 ⁇ L of AIF 103-613 proteins were incubated with the compounds for 20 min before adding 5 LIL of CHCHD4 for 2 h.
- 16 wells correspond to the positive control and 16 wells correspond to the negative control.
- the positive control corresponds to the measurement of the interaction of the proteins AIF 103-613 and CHCHD4 in the presence of peptide N27 (equivalent to the minimum signal).
- the negative control corresponds to the measurement of the interaction of the proteins AIF 103-613 and CHCHD4 in the presence of the buffer (0.1% BSA / PBS) (equivalent to the maximum signal).
- CV is defined as the ratio of the standard deviation (SD) divided by the mean of each control:
- S / N is the ratio corresponding to the mean of the negative controls, divided by the mean of the positive controls:
- the Z 'factor evaluates the signal amplitude of a test, by measuring the difference between positive and negative controls, and taking into account the standard deviations (SD): Each series of measurements is validated if CV ⁇ 15%, S / N> 10 and factor Z '> 0.5 [Goktug et al., Drug Discovery, 2013 doilO.5772 / 52508],
- the compounds are selected if the signal obtained in the presence of the compound is below the following TH threshold:
- the ALPHA test is repeated manually using another batch of compound powder.
- Each compound is tested at 10 ⁇ M and 30 ⁇ M due to the Hook effect specific to ALPHAscreen technology and in order to select the compounds giving a signal located in the ascending part of the Hook bell and therefore active at low dose with a view to drug development.
- the compound is selected if:
- the effect-dose relationship of the compound is determined. This makes it possible to determine the median inhibitory concentration (050) of said compound.
- Some of the compounds identified by means of the Alpha test as described above were tested by surface plasmon resonance (Biacore TM T 100, GE Healthcare Life Sciences).
- the CHCHD4 protein was covalently immobilized on a dextran matrix comprising COOH functional carboxyl groups (S-series CM5® sensor chip, GE Healthcare Life Sciences, 29149603).
- the compounds (at 10 ⁇ M) were pre-incubated for 20 min with the AIF protein, at room temperature in DPBS buffer at pH 7.4 (Sigma, D8577). Then, the mixture of compound and AIF protein was injected for 3 min at 30 ⁇ L per minute at 25 ° C.
- a negative control was carried out by injecting the AIF protein alone at 1 ⁇ M (diluted in 0.1% DMSO / PBS).
- a positive control was carried out by injecting a mixture of peptide at N27 (at 3 ⁇ M) and of AIF protein.
- a compound is validated if it is capable of significantly reducing the interaction between AIF 103-613 and CHCHD4, i.e. if the inhibition obtained with the compound corresponds to at least 50% of the inhibition obtained with the positive control, namely with the peptide N27.
- the sensorgrams were analyzed using the BIAevaluation software (version 2.0.4).
- the effect of the compounds on the metabolism of a non-small cell lung cancer cell line (A549) was tested using Seahorse technology (XFe96, Agilent) and cell death was assessed by measurement of release of lactate dehydrogenase (LDH, Promega).
- LDH lactate dehydrogenase
- the cells seeded in 96-well microplates (20,000 cells / well) were treated with the compounds in dose response (0.03; 0.1; 0.3; 1; 3; 10 ⁇ M) for 3 h in DMEM medium without serum then mitochondrial respiration (OXPHOS) and glycolysis were measured in real time.
- OXPHOS mitochondrial respiration
- the culture supernatant was taken to analyze cell death and the number of cells was determined by counting after labeling the cells with DAPI using a fluorescence microscope (Zeiss). The number of cells per well at the end of the experiment was then used to normalize the results obtained by the Seahorse.
- Prestwick library (1280 molecules) was screened using 4 384-well plates (Plate # 1 to # 4).
- the Prestwick compound library comprising 1280 molecules, was screened using 4 384-well plates, as described above.
- the compounds were selected on the basis of the signal obtained in Alphascreen® in the presence of the compound at a concentration of 10 ⁇ M. In particular, the compound is selected if the signal obtained at 1 O ⁇ M is less than a threshold value
- TH mean (negative control signal) - 5 * SD (negative control signal)).
- 148 were selected, ie 12% of the library of compounds (cf. FIG. 2). The 148 selected compounds were tested again using a manually performed ALPHA assay as described above. Of the 148 compounds tested, 11 compounds were finally selected. For the 11 selected compounds:
- the signal obtained at 30 ⁇ M is lower than the signal obtained at 10 ⁇ M.
- Table 2 below lists the 11 compounds selected by ALPHA screen. The CAS numbers and chemical structures of each compound are reported in Table 2 below. Table 2a
- the inhibition of the interaction of the AIF and CHCHD4 proteins by thioridazine and mitoxantrone was analyzed by means of a surface plasmon resonance test (cf. FIG. 3).
- a compound is considered to inhibit the interaction of the AIF and CHCHD4 proteins if the inhibition obtained with the compound corresponds to at least 50% of the inhibition obtained with the positive control, namely with the N27 peptide.
- the surface plasmon resonance test confirmed that thioridazine and mitoxantrone are able to inhibit the interaction between AIF and CHCHD4 proteins. 3) Confirmation of the cytotoxic properties of the compounds
- Table 4 below demonstrates the cytotoxic properties of certain compounds towards non-small cell lung cancer cells (human cell line A549).
- the concentration of compound indicated in the “toxicity” column represents the lowest dose tested for which a toxicity greater than 20% was measured.
- the table shows that a 3 hour treatment with the compounds induces cytotoxicity of A549 cells in the concentration range tested (see method described above).
- experiments have shown that the compounds act on energy metabolism either by modulating glycolysis or modulating mitochondrial activity.
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| WO2014118296A1 (fr) * | 2013-01-31 | 2014-08-07 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Procédés de traitement de troubles mitochondriaux et de troubles neurodégénératifs |
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| WO2014118296A1 (fr) * | 2013-01-31 | 2014-08-07 | INSERM (Institut National de la Santé et de la Recherche Médicale) | Procédés de traitement de troubles mitochondriaux et de troubles neurodégénératifs |
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| CA3169127A1 (fr) | 2021-09-02 |
| FR3107769B1 (fr) | 2022-02-18 |
| FR3118414B1 (fr) | 2025-04-18 |
| EP4111200A1 (fr) | 2023-01-04 |
| US20230221321A1 (en) | 2023-07-13 |
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