WO2017065127A1 - 腎癌薬物療法の効果判定のための血中バイオマーカー - Google Patents
腎癌薬物療法の効果判定のための血中バイオマーカー Download PDFInfo
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- WO2017065127A1 WO2017065127A1 PCT/JP2016/080084 JP2016080084W WO2017065127A1 WO 2017065127 A1 WO2017065127 A1 WO 2017065127A1 JP 2016080084 W JP2016080084 W JP 2016080084W WO 2017065127 A1 WO2017065127 A1 WO 2017065127A1
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- 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
- G01N33/57407—Specifically defined cancers
- G01N33/57438—Specifically defined cancers of liver, pancreas or kidney
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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
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- 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
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- 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
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- G01N2333/914—Hydrolases (3)
- G01N2333/978—Hydrolases (3) acting on carbon to nitrogen bonds other than peptide bonds (3.5)
- G01N2333/98—Hydrolases (3) acting on carbon to nitrogen bonds other than peptide bonds (3.5) acting on amide bonds in linear amides (3.5.1)
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- G—PHYSICS
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- G01N2800/00—Detection or diagnosis of diseases
- G01N2800/52—Predicting or monitoring the response to treatment, e.g. for selection of therapy based on assay results in personalised medicine; Prognosis
Definitions
- the present invention relates to a blood biomarker for determining the effect of renal cancer drug therapy.
- the incidence of renal cancer in Japan is estimated to be 7-8 per 100,000, increasing year by year.
- the principle of renal cancer treatment is surgical resection, but about 30% of all renal cancer patients have metastasis and are said to be progressive.
- Drug therapy and immunotherapy are applied to progressive cases where surgery is difficult.
- tyrosine kinase inhibitors that inhibit angiogenesis and mTOR inhibitors.
- the effectiveness of such pharmacological agents for renal cancer is determined by the reduction rate of the tumor examined by an image such as a CT scan.
- an image such as a CT scan.
- the response rate (tumor reduction rate) of TKI is not as pronounced as that of conventional anticancer agents, and about 10 to 30% of cases with a reduction of 30% or more in CT images.
- patients with effective drug therapy often take several months to see reductions on CT scans. Therefore, at present, administration of pharmacotherapy agents is continued until a clear progression is confirmed by CT images.
- TKI has various problems such as high blood pressure, diarrhea, general malaise, hand-foot syndrome, etc. that are different from conventional anticancer drugs, and is regarded as a problem. If the treatment effect can be determined at an early stage after the start of treatment by pharmacotherapy, it will not be possible to continue ineffective treatment, which is actually not effective, leading to improved patient prognosis and QOL. However, as described above, there is a problem that the effect determination by the CT scan is not quick. In addition, frequent CT scans are difficult due to radiation exposure problems, and the timing of drug drug change may be delayed.
- blood biomarker that reflects the pathology of renal cancer
- DJ-1 was isolated in 1997 by Kita Ariga et al. As a novel oncogene that cooperatively transforms cells into cancer. Subsequently, this gene was isolated in 2003 as PARK7, the causative gene for familial Parkinson's disease, and is now called PARK7 / DJ1.
- PARK7 / DJ1 is involved in the protection of oxidative stress by active oxygen, transcriptional regulation, protease, and mitochondrial function regulation, and its relevance to breast cancer and non-small cell lung cancer has also been pointed out (Non-patent Document 1).
- Non-patent Document 3 There are two reports on PARK7 / DJ1 and renal cancer (renal carcinoma): a 2009 report by Sitaram et al. (Non-patent document 3) and a 2013 report by Baumunk et al. (Non-patent document 4).
- Non-Patent Document 4 RT-PCR analysis was performed on the expression of PDK-1 and PARK7 / DJ1 in 91 RCC cases, and PARK7 / DJ1 was observed in both normal kidney tissue and RCC. ⁇ There was no pathological correlation.
- the correlation between progression or activity of renal cancer and the expression of PARK7 in the tissue is negative in the previous report, and that there is a correlation between the level of PARK7 in blood and the therapeutic effect of renal cancer drug therapy. It is not known at all that it is useful as a blood biomarker for determining the effect of renal cancer drug therapy.
- An object of the present invention is to provide a means that makes it possible to easily determine the efficacy of a renal cancer drug therapeutic agent by a blood test.
- the inventors of the present application diligently screened for proteins in which the blood concentration decreased in the treatment response group in which long-term progression-free survival was obtained by TKI treatment, and the blood concentration increased in the treatment non-response (progression) group.
- PARK7 was found to be a powerful blood biomarker for determining the efficacy of TKI and mTOR inhibitors, and the blood PARK7 level reflects the pathological condition (activity) of renal cancer.
- various therapeutic agents for renal cancer including novel therapeutic agents for renal cancer that will be put to practical use in the future, and the therapeutic effects of candidate substances are also in the blood.
- the inventors found that the PARK7 level can be utilized and completed the present invention.
- the present invention is a method for assisting in the determination of the effect of the drug therapy, comprising measuring the PARK7 level in a blood sample isolated from a renal cancer patient receiving drug therapy for the treatment of renal cancer.
- an increase in PARK7 levels provides a method that is an indication that the drug therapy is not effective.
- the present invention also provides use of PARK7 as a blood biomarker for determining the effect of renal cancer drug therapy.
- the present invention provides a blood biomarker for determining the effect of renal cancer drug therapy, comprising PARK7.
- the present invention is a method for assisting in the determination of the effect of a candidate substance for a therapeutic agent for renal cancer, wherein the PARK7 level in a blood sample separated from a subject having renal cancer before and after administration of the candidate substance is determined.
- the candidate substance may be effective for the treatment of renal cancer when the PARK7 level in the blood sample after administration is reduced compared to the PARK7 level in the blood sample before administration
- a method is provided that is determined.
- a blood biomarker capable of determining the effect of renal cancer drug therapy is provided for the first time.
- the PARK7 level in the blood of patients undergoing drug therapy is useful as data for determining the therapeutic effect of a drug therapy agent in use, and greatly assists a doctor in determining the effect of drug therapy.
- the effect can be determined from an extremely early stage after the start of treatment, and the effect of the drug therapy can be determined earlier than the method of determining the presence or absence of reduction by CT scan.
- the therapeutic effect can be determined with a small amount of blood sample, it can be frequently monitored without worrying about exposure, and this is also advantageous for quick determination of the therapeutic effect.
- a blood test is very convenient because it can be easily performed in a facility without a CT scan. If the therapeutic effect can no longer be obtained, it will be possible to detect it at an early stage and take measures such as changing the therapeutic agent, and the therapeutic effect can be determined at an appropriate timing.
- the number of patients with renal cancer who continue to take untreated medications is expected to improve QOL and medical economic effects, and also improve the survival of patients with renal cancer. Since the blood PARK7 level reflects the activity of renal cancer, it can be used to determine the effects of various drug therapeutic agents as well as the effects of candidate drugs for renal cancer drugs.
- the blood PARK7 level is used to determine the effect of a therapeutic drug candidate substance, it becomes possible to quickly evaluate the effect of the new therapeutic drug, for example, in a clinical trial of a new therapeutic drug for human renal cancer.
- the present invention also contributes to the development of a novel therapeutic agent for renal cancer.
- the amino acid sequence shown in SEQ ID NO: 2 is the amino acid sequence of human PARK7.
- NCBI database has multiple mRNA sequences registered as transcription variants 1, 2, and X1 (accession numbers NM_007262.4, NM_001123377.1, XM_005263424.2).
- the amino acid sequence of the PARK7 protein that encodes all of them is Are the same.
- SEQ ID NO: 1 shows the base sequence registered in NM_007262.4 as an example of the mRNA sequence of the PARK7 gene.
- the patient who is the subject of the present invention is a renal cancer patient suffering from renal cancer (especially, advanced renal cancer such as metastatic renal cancer or unresectable renal cancer) and receiving pharmacotherapy. Is a human patient.
- renal cancer especially, advanced renal cancer such as metastatic renal cancer or unresectable renal cancer
- renal cancer is synonymous with renal cell carcinoma, and includes clear cell carcinoma, papillary renal cell carcinoma, chromophoric cell carcinoma, collecting duct cancer, and the like.
- the term “pharmacotherapy” includes therapies with various drugs that have a therapeutic effect on renal cancer, for example, immunotherapy using cytokines and the like.
- the drug used for the drug therapy is not particularly limited, and includes various drugs such as a low molecular compound, a molecular target drug, a nucleic acid drug, an antibody drug, and a peptide drug.
- Renal cancer pharmacological drugs currently in practical use are molecularly targeted drugs. Roughly speaking, tyrosine kinase inhibitors (TKI) that inhibit angiogenesis such as sunitinib and sorafenib, and enzymes that mainly regulate cancer growth
- TKI tyrosine kinase inhibitors
- mTOR protein inhibitors that suppress cancer growth by inhibiting.
- the change in blood PARK7 level reflects the effect of the drug in use, and the effect of the present invention can be determined.
- immune checkpoint inhibitors such as anti-PD-1 antibody and anti-PD-L1 antibody have attracted attention in the field of cancer treatment.
- Clinical trials of immune checkpoint inhibitors as therapeutic agents for various cancers such as renal cancer, malignant melanoma, and non-small cell lung cancer are underway in Japan and other countries, and some have already been approved in Japan. In the future, it is expected to be approved and put to practical use as a therapeutic agent for renal cancer.
- a novel therapeutic agent for renal cancer such as an immune checkpoint inhibitor is also a target for determination of therapeutic effect according to the present invention.
- Blood PARK7 level reflects the activity of renal cancer, and changes in renal cancer activity can be evaluated by changes in blood PARK7 level, so the present invention using blood PARK7 level as an indicator, It is not limited to said illustration, It can utilize for the effect determination of various renal cancer drug therapeutic agents.
- Blood samples include whole blood, plasma and serum.
- the blood sample used in the present invention may be, for example, a plasma sample or a serum sample.
- the blood sample can be a plasma sample.
- Blood samples should be collected continuously during drug administration. For comparison, it is desirable to collect a blood sample before or at the start of drug therapy. Normally, blood samples are collected every few weeks, but the timing of blood sample collection may be appropriately changed according to the patient's condition, symptoms, and the like.
- the PARK7 level in the sample can be examined by measuring the abundance of the PARK7 protein or fragment thereof in the sample.
- the means for measuring the PARK7 level in the sample is not particularly limited as long as it is a means capable of measuring the polypeptide. Examples of the technique for measuring a polypeptide include immunoassay and mass spectrometry, but the immunoassay does not require large-scale equipment and the measurement operation is simple, so that it can be preferably used in the present invention. . Polyclonal antibodies and monoclonal antibodies capable of detecting PARK7 are known and commercially available.
- an anti-PARK7 antibody or antigen-binding fragment thereof that specifically recognizes PARK7 is prepared and used by a conventional hybridoma method or the like. May be.
- the anti-PARK7 polyclonal antibody for example, immunizes non-human animals with the full length of PARK7 protein or appropriate partial region fragments together with an appropriate adjuvant, obtains antisera from blood collected from the non-human animals, and polyclonal antibodies in the antisera Can be obtained by purification. Immunization is usually carried out several times over several weeks in order to increase the antibody titer in the immunized animal.
- the antibody in the antiserum can be purified by, for example, ammonium sulfate precipitation, fractionation by anion chromatography, affinity column purification, or the like.
- the anti-PARK7 monoclonal antibody is obtained by, for example, collecting antibody-producing cells such as spleen cells and lymphocytes from a non-human animal immunized with the full length of PARK7 protein or an appropriate fragment as described above, and fusing it with myeloma cells.
- a hybridoma can be prepared, and a hybridoma producing an antibody that binds to the PARK7 protein can be screened, grown, and obtained from the culture supernatant.
- the full-length PARK7 protein or fragment thereof used for immunization of non-human animals can be prepared by conventional methods such as chemical synthesis and genetic engineering techniques based on the known PARK7 base sequence and amino acid sequence information described in the Sequence Listing of the present application.
- the chemical synthesis method examples include Fmoc method (fluorenylmethyloxycarbonyl method), tBoc method (t-butyloxycarbonyl method) and the like. Moreover, it can also synthesize
- a desired region of PARK7 cDNA is amplified from a human cDNA library, and this is incorporated into an appropriate vector, and the polypeptide is expressed in an appropriate expression system. And the polypeptide may be recovered.
- the vectors used and various expression systems are also well known.
- Various vectors, host cells, reagents, kits Can be appropriately selected and used by those skilled in the art. Human-derived cultured cells are also commercially available and distributed and are easy to obtain.
- the “antigen-binding fragment” may be any antibody fragment as long as the binding property of the original antibody to the corresponding antigen (antigen-antibody reactivity) is maintained.
- Specific examples include, but are not limited to, Fab, F (ab ′) 2 , scFv, and the like.
- Fab and F (ab ′) 2 can be obtained by treating a monoclonal antibody with a proteolytic enzyme such as papain or pepsin.
- a method for producing scFv single chain fragment of variable region is also well known.
- mRNA of a hybridoma produced as described above is extracted, single-stranded cDNA is prepared, and immunoglobulin H chain and L PCR is carried out using primers specific to the chain to amplify the immunoglobulin H chain gene and L chain gene, and these are ligated with a linker, added with an appropriate restriction enzyme site, and introduced into a plasmid vector.
- ScFv can be obtained by transforming E. coli to express scFv and recovering it from E. coli.
- Immunoassays themselves are well known in this field. When immunoassay is classified based on reaction format, there are sandwich method, competitive method, aggregation method, Western blot method, etc., and when classified based on label, enzyme immunoassay, radioimmunoassay, fluorescent immunoassay, etc. is there. In the present invention, any immunoassay method capable of quantitative detection may be used. Although not particularly limited, for example, a sandwich method such as a sandwich ELISA can be preferably used.
- anti-PARK7 antibody that binds to PARK7 is immobilized on a solid phase (immobilized antibody), reacted with a sample, washed, and then anti-PARK7 antibody (typically capable of binding to PARK7 simultaneously with the immobilized antibody)
- the labeled antibody is reacted with anti-PARK7 antibody that binds to PARK7 at a site different from that of the immobilized antibody, and after washing, the labeled antibody bound to the solid phase is measured.
- Both the immobilized antibody and the labeled antibody may be polyclonal antibodies or monoclonal antibodies. An antigen-binding fragment of the antibody can be used in place of the antibody.
- the measurement of the labeled antibody can be performed by measuring the signal from the labeled substance.
- the signal measurement method is appropriately selected according to the type of labeling substance.
- a substrate for the enzyme may be added to the reaction system, and the amount of color development or luminescence generated by the enzyme reaction may be measured using an absorptiometer or luminometer.
- immunoassay is performed using an anti-PARK7 antibody or antigen-binding fragment thereof, and the correlation between the amount of signal from the label and the concentration of PARK7 in the standard sample is plotted.
- a calibration curve is created in advance, the same operation is performed on a blood sample with an unknown PARK7 concentration, the amount of signal from the label is measured, and the measured value is applied to this calibration curve, so that PARK7 in the blood sample is determined. It can be quantified. Since the measurement value only needs to be compared with the past measurement value of the patient, the calculation of the absolute value of the concentration is not essential, and the fluctuation of the PARK7 level may be evaluated by comparing the signal detection value.
- both the immobilized antibody and the labeled antibody are monoclonal antibodies
- whether or not a combination of monoclonal antibodies is preferable can be easily examined by actually performing an immunoassay.
- the recognition site of the antibody may be identified to see if it recognizes a different epitope. Identification of the recognition site of the antibody can be performed by a conventional method well known in this field. Briefly, for example, the corresponding antigen, PARK7, is partially digested with a proteolytic enzyme such as trypsin, and the digest is bound to the affinity column to which the antibody to be examined for binding is bound through the partially digested solution. Subsequently, the recognition site of the antibody can be identified by eluting the bound digest and conducting mass spectrometry in the usual manner.
- a proteolytic enzyme such as trypsin
- the blood level of PARK7 varies depending on the size of renal cancer. The larger the tumor, the higher the blood level. In patients with small tumors, the blood level may not be very different from that of healthy subjects. Therefore, it is difficult to set a cutoff value as an absolute value that can be applied. However, fluctuations in the blood level of PARK7 being kept low when the effect of pharmacotherapy is obtained, and the blood level of PARK7 being elevated when there is no effect or has been lost are Regardless of the size of Therefore, in the present invention, the change in the PARK7 level in the individual is examined, and it is determined whether the PARK7 level has increased by comparison with the patient's own past measurement values.
- Whether or not it is higher than the past measurement value is judged at least by comparison with the previous measurement value. That is, it is mainly determined by comparison with the previous measurement value, and can be determined in consideration of the fluctuation tendency before and after the previous time as appropriate. If the blood PARK7 level is reduced, or if the reduced state is maintained, it can be determined that the drug being used has a therapeutic effect, so if you continue to use the same drug and continue to follow up Good. If there is a rapid rise, renal cancer may have progressed rapidly, so it is desirable to change the type of drug used as soon as possible. If a gradual upward trend is observed, the type of drug used may be changed immediately, or a change in the type of drug may be considered after confirming the upward trend at the next measurement timing. . In addition, if there is no particular fluctuation in the blood PARK7 level since the start of treatment with that drug, the drug may not be very effective, so if necessary, advance the next measurement time, Considering the degree of side effects, you may consider changing the drug used.
- the blood PARK7 level reflects the activity of renal cancer, it is possible to determine the effect of a renal cancer therapeutic drug candidate substance using the blood PARK7 level as an index.
- the candidate substance is administered to a subject having renal cancer.
- the subject is a human or non-human mammal. In the case of humans, it is assumed that the effect of a candidate substance is determined mainly in clinical trials.
- the non-human mammal can be, for example, a renal cancer model animal transplanted with renal cancer cells. From the subject, blood samples are collected before and after the administration of the candidate substance, and the PARK7 level in these blood samples is measured. The blood sample after administration may be collected once or multiple times. When the blood PARK7 level after administration is reduced compared to the blood PARK7 level before administration, it can be determined that the candidate substance may be effective in treating renal cancer.
- FDG is a drug in which positron nuclides are introduced into glucose, and its behavior in vivo is almost the same as glucose.
- glucose is highly accumulated in the tumor site. Therefore, the activity of cancer can be evaluated by examining the accumulation of FDG.
- each image is a value obtained by semi-quantifying the accumulation of FDG.
- the concentration of PARK7 in the blood decreased during mTOR inhibitor treatment
- the accumulation of FDG was decreased as assessed by PET / CT, and the activity of cancer was decreased. That is, it was shown that a therapeutic effect was obtained.
- case 4 in which the concentration of PARK7 was increased, no change was observed in the accumulation of FDG, indicating that no therapeutic effect was obtained.
- the therapeutic effect of mTOR inhibitor type renal cancer drugs can be determined by the change in blood PARK7 concentration.
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Abstract
Description
腎癌治療薬としてTKI(チロシンキナーゼ阻害剤)の投与を受けている進行性腎細胞癌患者19例について、投与開始時及び開始2週目に血液試料を採取し、血漿を分離し、血漿中のPARK7レベルを測定した。測定には市販のサンドイッチELISAキット(Cyclex社)を使用し、標識酵素HRP及び基質物質の反応による発色をルミノメータにより検出した。キットに添付のPARK7スタンダードを用いて標準試料を調製し、検量線を作成した。この検量線に当てはめて血漿試料中のPARK7濃度を算出した。算出したPARK7濃度の比較、あるいはルミノメータの検出値の比較により、血漿中PARK7レベルの変動を評価したところ、TKI投与開始時と比較して投与開始2週目に血漿中PARK7レベルが低下した症例は13例、上昇した症例は6例であった。これら低下症例群と上昇症例群について、無増悪生存期間を調べた。
mTOR阻害剤の投与を開始した腎癌4症例を対象に、治療中の血中PARK7濃度の変化を測定した。血中PARK7濃度の測定は上記1と同様に市販のELISAキットを使用し、血漿中のPARK7濃度として測定し、ルミノメータによる検出値を比較して血中PARK7レベルの変動を評価した。
Claims (6)
- 腎癌治療のための薬物療法を受けている腎癌患者から分離された血液試料中のPARK7レベルを測定することを含む、前記薬物療法の効果判定を補助する方法であって、PARK7レベルの上昇は、当該薬物療法が効果的ではないことの指標となる、方法。
- PARK7レベルが上昇したか否かが、前記患者の少なくとも前回測定値との比較により判断される、請求項1記載の方法。
- 前記血液試料が血漿試料又は血清試料である、請求項1又は2記載の方法。
- 腎癌薬物療法の効果判定血中バイオマーカーとしてのPARK7の使用。
- PARK7からなる、腎癌薬物療法の効果判定血中バイオマーカー。
- 腎癌治療薬の候補物質の効果判定を補助する方法であって、腎癌を有する被検体から前記候補物質の投与前及び投与後に分離された血液試料中のPARK7レベルを測定することを含み、投与前の血液試料におけるPARK7レベルと比較して投与後の血液試料におけるPARK7レベルが低下している場合に、当該候補物質が腎癌治療に有効である可能性があると判定される、方法。
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JP2017545194A JP6325177B2 (ja) | 2015-10-14 | 2016-10-11 | 腎癌薬物療法の効果判定のための血中バイオマーカー |
US15/768,192 US11061034B2 (en) | 2015-10-14 | 2016-10-11 | Blood biomarker for use in evaluation of effect of drug therapy on kidney cancer |
EP16855381.6A EP3364188B1 (en) | 2015-10-14 | 2016-10-11 | Blood biomarker for use in evaluation of effect of drug therapy on kidney cancer |
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Citations (5)
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JP2009511028A (ja) * | 2005-10-11 | 2009-03-19 | ラボラトリオス・サルバト・ソシエダッド・アノニマ | 膀胱の移行上皮癌を検出するための非侵襲性invitro方法 |
JP2014517300A (ja) * | 2011-05-31 | 2014-07-17 | メタノミクス ヘルス ゲーエムベーハー | 多発性硬化症を診断する方法 |
JP2015513370A (ja) * | 2012-03-13 | 2015-05-11 | ザ・ジョンズ・ホプキンス・ユニバーシティ | 脳損傷または神経変性のバイオマーカーとしてのシトルリン化脳および神経タンパク質 |
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US11061034B2 (en) | 2021-07-13 |
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EP3364188A1 (en) | 2018-08-22 |
EP3364188A4 (en) | 2019-06-26 |
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