CN116063447B - 用于检测adap自身抗体的抗原多肽及其应用 - Google Patents
用于检测adap自身抗体的抗原多肽及其应用 Download PDFInfo
- Publication number
- CN116063447B CN116063447B CN202211126807.0A CN202211126807A CN116063447B CN 116063447 B CN116063447 B CN 116063447B CN 202211126807 A CN202211126807 A CN 202211126807A CN 116063447 B CN116063447 B CN 116063447B
- Authority
- CN
- China
- Prior art keywords
- adap
- alzheimer
- autoantibody
- disease
- antigenic polypeptide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229920001184 polypeptide Polymers 0.000 title claims abstract description 64
- 108090000765 processed proteins & peptides Proteins 0.000 title claims abstract description 64
- 102000004196 processed proteins & peptides Human genes 0.000 title claims abstract description 64
- 108091007433 antigens Proteins 0.000 title claims abstract description 54
- 102000036639 antigens Human genes 0.000 title claims abstract description 54
- 239000000427 antigen Substances 0.000 title claims abstract description 51
- 108091011190 FYN-binding protein 1 Proteins 0.000 title claims abstract description 48
- 102100035261 FYN-binding protein 1 Human genes 0.000 title claims abstract description 48
- 208000024827 Alzheimer disease Diseases 0.000 claims abstract description 63
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 36
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 27
- 238000013399 early diagnosis Methods 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 21
- 230000000890 antigenic effect Effects 0.000 claims description 16
- 102100025639 Sortilin-related receptor Human genes 0.000 claims description 13
- 101000878540 Homo sapiens Protein-tyrosine kinase 2-beta Proteins 0.000 claims description 12
- 108060009345 SORL1 Proteins 0.000 claims description 12
- 108091007504 ADAM10 Proteins 0.000 claims description 11
- 102100037787 Protein-tyrosine kinase 2-beta Human genes 0.000 claims description 11
- 102000036664 ADAM10 Human genes 0.000 claims description 10
- 101000651299 Homo sapiens Sprouty-related, EVH1 domain-containing protein 2 Proteins 0.000 claims description 10
- 102100027650 Sprouty-related, EVH1 domain-containing protein 2 Human genes 0.000 claims description 10
- 101000759889 Homo sapiens Tetraspanin-14 Proteins 0.000 claims description 9
- 101000645402 Homo sapiens Transmembrane protein 163 Proteins 0.000 claims description 9
- 102100024995 Tetraspanin-14 Human genes 0.000 claims description 9
- 102100025764 Transmembrane protein 163 Human genes 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 210000002966 serum Anatomy 0.000 claims description 6
- 102100040684 Fermitin family homolog 2 Human genes 0.000 claims description 5
- 101000892677 Homo sapiens Fermitin family homolog 2 Proteins 0.000 claims description 5
- 108020004707 nucleic acids Proteins 0.000 claims description 5
- 102000039446 nucleic acids Human genes 0.000 claims description 5
- 150000007523 nucleic acids Chemical class 0.000 claims description 5
- 238000003556 assay Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000003550 marker Substances 0.000 claims description 4
- 239000000243 solution Substances 0.000 claims description 4
- 239000013642 negative control Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000000872 buffer Substances 0.000 claims description 2
- 239000013641 positive control Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims description 2
- 239000012898 sample dilution Substances 0.000 claims description 2
- 239000011534 wash buffer Substances 0.000 claims description 2
- 101000794187 Homo sapiens Tetraspanin-18 Proteins 0.000 claims 1
- 102100030175 Tetraspanin-18 Human genes 0.000 claims 1
- 125000003275 alpha amino acid group Chemical group 0.000 claims 1
- 239000012086 standard solution Substances 0.000 claims 1
- 238000011161 development Methods 0.000 abstract description 6
- 201000010099 disease Diseases 0.000 abstract description 6
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 abstract description 6
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 206010012289 Dementia Diseases 0.000 abstract description 4
- 208000010877 cognitive disease Diseases 0.000 abstract description 4
- 239000003814 drug Substances 0.000 abstract description 4
- 208000028698 Cognitive impairment Diseases 0.000 abstract description 3
- 229940079593 drug Drugs 0.000 abstract description 3
- 210000005259 peripheral blood Anatomy 0.000 abstract description 2
- 239000011886 peripheral blood Substances 0.000 abstract description 2
- 241000282414 Homo sapiens Species 0.000 description 13
- 230000027455 binding Effects 0.000 description 11
- 238000009739 binding Methods 0.000 description 10
- 239000012634 fragment Substances 0.000 description 10
- 150000001413 amino acids Chemical group 0.000 description 9
- 238000002965 ELISA Methods 0.000 description 8
- 210000004556 brain Anatomy 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 6
- 230000004913 activation Effects 0.000 description 5
- 210000004027 cell Anatomy 0.000 description 5
- 210000000170 cell membrane Anatomy 0.000 description 5
- 230000001149 cognitive effect Effects 0.000 description 5
- 230000018109 developmental process Effects 0.000 description 5
- 230000013629 beta-amyloid clearance Effects 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 230000019491 signal transduction Effects 0.000 description 4
- 102000013455 Amyloid beta-Peptides Human genes 0.000 description 3
- 108010090849 Amyloid beta-Peptides Proteins 0.000 description 3
- 241000283707 Capra Species 0.000 description 3
- 229920001213 Polysorbate 20 Polymers 0.000 description 3
- 102000007056 Recombinant Fusion Proteins Human genes 0.000 description 3
- 108010008281 Recombinant Fusion Proteins Proteins 0.000 description 3
- 230000031018 biological processes and functions Effects 0.000 description 3
- 238000003745 diagnosis Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 3
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 3
- 102000005962 receptors Human genes 0.000 description 3
- 108020003175 receptors Proteins 0.000 description 3
- ZQAQXZBSGZUUNL-BJUDXGSMSA-N 2-[4-(methylamino)phenyl]-1,3-benzothiazol-6-ol Chemical compound C1=CC(N[11CH3])=CC=C1C1=NC2=CC=C(O)C=C2S1 ZQAQXZBSGZUUNL-BJUDXGSMSA-N 0.000 description 2
- 102000004219 Brain-derived neurotrophic factor Human genes 0.000 description 2
- 108090000715 Brain-derived neurotrophic factor Proteins 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 206010061818 Disease progression Diseases 0.000 description 2
- 108010001336 Horseradish Peroxidase Proteins 0.000 description 2
- 102100032889 Sortilin Human genes 0.000 description 2
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- 238000013459 approach Methods 0.000 description 2
- 229940077737 brain-derived neurotrophic factor Drugs 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 210000003169 central nervous system Anatomy 0.000 description 2
- 210000001175 cerebrospinal fluid Anatomy 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000005750 disease progression Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000011534 incubation Methods 0.000 description 2
- NOESYZHRGYRDHS-UHFFFAOYSA-N insulin Chemical compound N1C(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(NC(=O)CN)C(C)CC)CSSCC(C(NC(CO)C(=O)NC(CC(C)C)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CCC(N)=O)C(=O)NC(CC(C)C)C(=O)NC(CCC(O)=O)C(=O)NC(CC(N)=O)C(=O)NC(CC=2C=CC(O)=CC=2)C(=O)NC(CSSCC(NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2C=CC(O)=CC=2)NC(=O)C(CC(C)C)NC(=O)C(C)NC(=O)C(CCC(O)=O)NC(=O)C(C(C)C)NC(=O)C(CC(C)C)NC(=O)C(CC=2NC=NC=2)NC(=O)C(CO)NC(=O)CNC2=O)C(=O)NCC(=O)NC(CCC(O)=O)C(=O)NC(CCCNC(N)=N)C(=O)NCC(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC=CC=3)C(=O)NC(CC=3C=CC(O)=CC=3)C(=O)NC(C(C)O)C(=O)N3C(CCC3)C(=O)NC(CCCCN)C(=O)NC(C)C(O)=O)C(=O)NC(CC(N)=O)C(O)=O)=O)NC(=O)C(C(C)CC)NC(=O)C(CO)NC(=O)C(C(C)O)NC(=O)C1CSSCC2NC(=O)C(CC(C)C)NC(=O)C(NC(=O)C(CCC(N)=O)NC(=O)C(CC(N)=O)NC(=O)C(NC(=O)C(N)CC=1C=CC=CC=1)C(C)C)CC1=CN=CN1 NOESYZHRGYRDHS-UHFFFAOYSA-N 0.000 description 2
- 238000007477 logistic regression Methods 0.000 description 2
- 238000001819 mass spectrum Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000001404 mediated effect Effects 0.000 description 2
- 230000002025 microglial effect Effects 0.000 description 2
- 230000001537 neural effect Effects 0.000 description 2
- 230000004770 neurodegeneration Effects 0.000 description 2
- 208000015122 neurodegenerative disease Diseases 0.000 description 2
- 230000008506 pathogenesis Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000026731 phosphorylation Effects 0.000 description 2
- 238000006366 phosphorylation reaction Methods 0.000 description 2
- 230000002797 proteolythic effect Effects 0.000 description 2
- 238000003908 quality control method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000011664 signaling Effects 0.000 description 2
- 108010014657 sortilin Proteins 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- 108091022885 ADAM Proteins 0.000 description 1
- 101150063038 ADAM10 gene Proteins 0.000 description 1
- 108091007505 ADAM17 Proteins 0.000 description 1
- 102000043279 ADAM17 Human genes 0.000 description 1
- 101150037123 APOE gene Proteins 0.000 description 1
- 102000002659 Amyloid Precursor Protein Secretases Human genes 0.000 description 1
- 108010043324 Amyloid Precursor Protein Secretases Proteins 0.000 description 1
- 101710137189 Amyloid-beta A4 protein Proteins 0.000 description 1
- 102100022704 Amyloid-beta precursor protein Human genes 0.000 description 1
- 101710151993 Amyloid-beta precursor protein Proteins 0.000 description 1
- 102100029470 Apolipoprotein E Human genes 0.000 description 1
- 102000007592 Apolipoproteins Human genes 0.000 description 1
- 108010071619 Apolipoproteins Proteins 0.000 description 1
- 102100021257 Beta-secretase 1 Human genes 0.000 description 1
- 108010078791 Carrier Proteins Proteins 0.000 description 1
- 108010001857 Cell Surface Receptors Proteins 0.000 description 1
- 102000000844 Cell Surface Receptors Human genes 0.000 description 1
- 102300050360 Clusterin isoform 1 Human genes 0.000 description 1
- 208000031124 Dementia Alzheimer type Diseases 0.000 description 1
- 102300046051 Disintegrin and metalloproteinase domain-containing protein 10 isoform 1 Human genes 0.000 description 1
- 102000004190 Enzymes Human genes 0.000 description 1
- 108090000790 Enzymes Proteins 0.000 description 1
- -1 FERM 2 Proteins 0.000 description 1
- 102300062835 Fermitin family homolog 2 isoform 1 Human genes 0.000 description 1
- 238000000729 Fisher's exact test Methods 0.000 description 1
- 102000058061 Glucose Transporter Type 4 Human genes 0.000 description 1
- 108010027412 Histocompatibility Antigens Class II Proteins 0.000 description 1
- 102000018713 Histocompatibility Antigens Class II Human genes 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 101000894895 Homo sapiens Beta-secretase 1 Proteins 0.000 description 1
- 101001022163 Homo sapiens FYN-binding protein 1 Proteins 0.000 description 1
- 101000795117 Homo sapiens Triggering receptor expressed on myeloid cells 2 Proteins 0.000 description 1
- 101000801254 Homo sapiens Tumor necrosis factor receptor superfamily member 16 Proteins 0.000 description 1
- 102000004877 Insulin Human genes 0.000 description 1
- 108090001061 Insulin Proteins 0.000 description 1
- 102100034343 Integrase Human genes 0.000 description 1
- 108090000862 Ion Channels Proteins 0.000 description 1
- 102000004310 Ion Channels Human genes 0.000 description 1
- OUYCCCASQSFEME-QMMMGPOBSA-N L-tyrosine Chemical compound OC(=O)[C@@H](N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-QMMMGPOBSA-N 0.000 description 1
- 108090001030 Lipoproteins Proteins 0.000 description 1
- 102000004895 Lipoproteins Human genes 0.000 description 1
- 108010090054 Membrane Glycoproteins Proteins 0.000 description 1
- 102000012750 Membrane Glycoproteins Human genes 0.000 description 1
- 102000018697 Membrane Proteins Human genes 0.000 description 1
- 108010052285 Membrane Proteins Proteins 0.000 description 1
- 102000004232 Mitogen-Activated Protein Kinase Kinases Human genes 0.000 description 1
- 108090000744 Mitogen-Activated Protein Kinase Kinases Proteins 0.000 description 1
- 108090000189 Neuropeptides Proteins 0.000 description 1
- 102000003797 Neuropeptides Human genes 0.000 description 1
- 102000019315 Nicotinic acetylcholine receptors Human genes 0.000 description 1
- 108050006807 Nicotinic acetylcholine receptors Proteins 0.000 description 1
- 230000005913 Notch signaling pathway Effects 0.000 description 1
- 108010033276 Peptide Fragments Proteins 0.000 description 1
- 102000007079 Peptide Fragments Human genes 0.000 description 1
- 102000003992 Peroxidases Human genes 0.000 description 1
- 108091000080 Phosphotransferase Proteins 0.000 description 1
- 108010029485 Protein Isoforms Proteins 0.000 description 1
- 102000001708 Protein Isoforms Human genes 0.000 description 1
- 102000001253 Protein Kinase Human genes 0.000 description 1
- 102000003923 Protein Kinase C Human genes 0.000 description 1
- 108090000315 Protein Kinase C Proteins 0.000 description 1
- 108090000412 Protein-Tyrosine Kinases Proteins 0.000 description 1
- 102000004022 Protein-Tyrosine Kinases Human genes 0.000 description 1
- 108010026552 Proteome Proteins 0.000 description 1
- 108010092799 RNA-directed DNA polymerase Proteins 0.000 description 1
- 108091006300 SLC2A4 Proteins 0.000 description 1
- 101710126735 Sortilin-related receptor Proteins 0.000 description 1
- 102000016715 Transforming Growth Factor beta Receptors Human genes 0.000 description 1
- 108010092867 Transforming Growth Factor beta Receptors Proteins 0.000 description 1
- 102100029678 Triggering receptor expressed on myeloid cells 2 Human genes 0.000 description 1
- 102000004243 Tubulin Human genes 0.000 description 1
- 108090000704 Tubulin Proteins 0.000 description 1
- 102100033725 Tumor necrosis factor receptor superfamily member 16 Human genes 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000000203 accumulation affect Effects 0.000 description 1
- 230000004721 adaptive immunity Effects 0.000 description 1
- 210000001789 adipocyte Anatomy 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000001363 autoimmune Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000090 biomarker Substances 0.000 description 1
- 230000001851 biosynthetic effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000002798 bone marrow cell Anatomy 0.000 description 1
- 230000003185 calcium uptake Effects 0.000 description 1
- 238000010523 cascade reaction Methods 0.000 description 1
- 230000034303 cell budding Effects 0.000 description 1
- 230000030833 cell death Effects 0.000 description 1
- 230000024245 cell differentiation Effects 0.000 description 1
- 230000001413 cellular effect Effects 0.000 description 1
- 210000000349 chromosome Anatomy 0.000 description 1
- 230000019771 cognition Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229950001954 crenezumab Drugs 0.000 description 1
- 230000003436 cytoskeletal effect Effects 0.000 description 1
- 230000001086 cytosolic effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000003748 differential diagnosis Methods 0.000 description 1
- 230000007783 downstream signaling Effects 0.000 description 1
- 210000002472 endoplasmic reticulum Anatomy 0.000 description 1
- 210000001163 endosome Anatomy 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 210000001650 focal adhesion Anatomy 0.000 description 1
- 230000002068 genetic effect Effects 0.000 description 1
- 238000010353 genetic engineering Methods 0.000 description 1
- 210000002288 golgi apparatus Anatomy 0.000 description 1
- 239000003102 growth factor Substances 0.000 description 1
- 102000047446 human FYB1 Human genes 0.000 description 1
- 210000002865 immune cell Anatomy 0.000 description 1
- 230000008076 immune mechanism Effects 0.000 description 1
- 230000028993 immune response Effects 0.000 description 1
- 238000000338 in vitro Methods 0.000 description 1
- 238000001727 in vivo Methods 0.000 description 1
- 230000015788 innate immune response Effects 0.000 description 1
- 229940125396 insulin Drugs 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000003834 intracellular effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 210000000265 leukocyte Anatomy 0.000 description 1
- 238000009593 lumbar puncture Methods 0.000 description 1
- 210000003712 lysosome Anatomy 0.000 description 1
- 230000001868 lysosomic effect Effects 0.000 description 1
- 210000002540 macrophage Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000028161 membrane depolarization Effects 0.000 description 1
- 210000000274 microglia Anatomy 0.000 description 1
- 208000027061 mild cognitive impairment Diseases 0.000 description 1
- 230000004879 molecular function Effects 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 230000001703 neuroimmune Effects 0.000 description 1
- 210000002569 neuron Anatomy 0.000 description 1
- 230000006576 neuronal survival Effects 0.000 description 1
- 239000002858 neurotransmitter agent Substances 0.000 description 1
- 230000009871 nonspecific binding Effects 0.000 description 1
- 238000006384 oligomerization reaction Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000000242 pagocytic effect Effects 0.000 description 1
- 230000003950 pathogenic mechanism Effects 0.000 description 1
- 108040007629 peroxidase activity proteins Proteins 0.000 description 1
- 150000003905 phosphatidylinositols Chemical class 0.000 description 1
- 102000020233 phosphotransferase Human genes 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 108060006633 protein kinase Proteins 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000003259 recombinant expression Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
- 238000005316 response function Methods 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 210000002363 skeletal muscle cell Anatomy 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 210000000225 synapse Anatomy 0.000 description 1
- 210000002504 synaptic vesicle Anatomy 0.000 description 1
- 238000010189 synthetic method Methods 0.000 description 1
- 230000009885 systemic effect Effects 0.000 description 1
- 229940126622 therapeutic monoclonal antibody Drugs 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 238000001890 transfection Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009261 transgenic effect Effects 0.000 description 1
- 102000035160 transmembrane proteins Human genes 0.000 description 1
- 108091005703 transmembrane proteins Proteins 0.000 description 1
- OUYCCCASQSFEME-UHFFFAOYSA-N tyrosine Natural products OC(=O)C(N)CC1=CC=C(O)C=C1 OUYCCCASQSFEME-UHFFFAOYSA-N 0.000 description 1
- 229960005486 vaccine Drugs 0.000 description 1
Classifications
-
- 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
-
- 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
- C12N9/10—Transferases (2.)
- C12N9/12—Transferases (2.) transferring phosphorus containing groups, e.g. kinases (2.7)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y207/00—Transferases transferring phosphorus-containing groups (2.7)
- C12Y207/10—Protein-tyrosine kinases (2.7.10)
- C12Y207/10002—Non-specific protein-tyrosine kinase (2.7.10.2), i.e. spleen tyrosine kinase
-
- 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
- G01N33/573—Immunoassay; Biospecific binding assay; Materials therefor for enzymes or isoenzymes
-
- 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
- G01N33/6854—Immunoglobulins
-
- 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
- G01N33/6893—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving proteins, peptides or amino acids related to diseases not provided for elsewhere
- G01N33/6896—Neurological disorders, e.g. Alzheimer's disease
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/435—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans
- G01N2333/46—Assays involving biological materials from specific organisms or of a specific nature from animals; from humans from vertebrates
- G01N2333/47—Assays involving proteins of known structure or function as defined in the subgroups
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2333/00—Assays involving biological materials from specific organisms or of a specific nature
- G01N2333/90—Enzymes; Proenzymes
- G01N2333/91—Transferases (2.)
- G01N2333/912—Transferases (2.) transferring phosphorus containing groups, e.g. kinases (2.7)
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2800/00—Detection or diagnosis of diseases
- G01N2800/28—Neurological disorders
- G01N2800/2814—Dementia; Cognitive disorders
- G01N2800/2821—Alzheimer
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Immunology (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Urology & Nephrology (AREA)
- Organic Chemistry (AREA)
- Hematology (AREA)
- Medicinal Chemistry (AREA)
- Biotechnology (AREA)
- Genetics & Genomics (AREA)
- Microbiology (AREA)
- Zoology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Wood Science & Technology (AREA)
- General Physics & Mathematics (AREA)
- Analytical Chemistry (AREA)
- Cell Biology (AREA)
- Pathology (AREA)
- Physics & Mathematics (AREA)
- Food Science & Technology (AREA)
- General Engineering & Computer Science (AREA)
- Toxicology (AREA)
- Biophysics (AREA)
- Gastroenterology & Hepatology (AREA)
- Neurology (AREA)
- Neurosurgery (AREA)
- Peptides Or Proteins (AREA)
Abstract
本发明公开了用于检测阿尔兹海默病疾病相关蛋白(Alzheimer’sDisease Associated Protein,ADAP)自身抗体的抗原多肽及其应用,属于免疫学技术领域。本发明提供了8条ADAP抗原多肽分别对应8种ADAP自身抗体。应用ADAP抗原多肽检测阿尔兹海默病患者外周血中相应的特异性自身抗体,这种自身抗体可作为免疫标志物评估阿尔兹海默病的发病风险和痴呆相关的认知损害发展程度。这种抗原多肽及其抗体可用于制备阿尔兹海默病早期诊断试剂和开发治疗该疾病的靶向药物。
Description
技术领域
本发明涉及免疫学技术领域,具体涉及用于检测ADAP自身抗体的抗原多肽及其应用。
背景技术
阿尔兹海默病(AD)是老年人痴呆的最常见原因,其在全球范围内发病率逐年上升。但至今为止,基于认知评定的临床方式仍是AD临床上鉴别诊断的最主要方式。淀粉样蛋白-β(Aβ)假说被广泛认为是AD最重要的发病机制。据信,Aβ异常积累到细胞外毒性斑块中是AD中神经变性和导致痴呆的重要基础。随着技术的进步,近年来涌现了一批围绕Aβ展开的AD新型诊断技术,如Aβ_PET-CT、脑脊液的Aβ水平测定、Aβ超高灵敏度质谱等。但这些技术存在一定的局限性:1)都是在Aβ沉积产生并积累一段时间后才能进行检测,这意味着由Aβ引起的神经退行性病变已经发生且不可逆转,无法做到疾病早期的风险预警;2)基于PET-CT或超高分辨率质谱等检测方式前期投入巨大,传导至受试者身上的单位检测价格很高,难以做到应检尽检;3)脑脊液检测需进行腰椎穿刺,受试者痛苦较大,且存在一定手术风险,因此临床上接受度不高。
研究证据表明,生物体的免疫机制在Aβ的清除中起重要作用。全基因组关联研究(GWAS)已经确定了130多个与AD相关的易感性位点,这些遗传发现提示了先天性和适应性免疫在AD发病机制中的作用,并表明细胞介导的Aβ清除的系统性失能促进了AD的发病和进展。围绕Aβ产生和积累过程中相关信号通路或生物学过程上关键靶点的自身免疫反应影响了Aβ的清除效率,在AD相关的神经退行性病变中发挥了关键作用。人体内源性蛋白抗原诱导产生的抗体被称为自身抗体,能够识别内源性蛋白分子,引起一系列免疫级联反应。在人体大脑中,小胶质细胞是清除Aβ的关键细胞。小胶质细胞与外周巨噬细胞同源,保留了较强的免疫应答功能。有研究表明,一些内源性蛋白分子的自身抗体能够激活小胶质细胞的吞噬功能。国外一些著名药企已开展AD相关的疫苗和治疗单抗临床研究(如罗氏的Aβ单抗crenezumab等),但由于关注点都集中于Aβ本身,靶点选择面较窄,实际效果并不尽如人意。
本发明涉及8个阿尔兹海默病疾病相关蛋白(Alzheimer’s Disease AssociatedProtein,ADAP)自身抗体(SORL1,TMEM163,SPRED2,CLU,PTK2B,TSPAN14,FERMT2,ADAM10):
Sortilin(SORL1)是一种在人类中由1号染色体上的SORT1基因编码的蛋白质。该蛋白是分选受体的液泡蛋白分选10蛋白(Vps10)家族中的一种I型膜糖蛋白。SORL1在许多组织中普遍表达,但在中枢神经系统中最为丰富。在细胞水平上,SORL1在高尔基体、内体、溶酶体和质膜之间的蛋白质转运中发挥作用。这种分子功能使SORL1能够参与各种生物过程,包括响应胰岛素将GLUT4转运到脂肪和骨骼肌细胞的质膜;介导proNGF和p75NTR:sortilin复合物之间的相互作用,通过充当共同受体来发出细胞死亡信号;对神经元存活所必需的脑源性神经营养因子(BDNF)具有精细调节功能。在AD中,SORL1是Vps10家族中首个被GWAS证明是迟发性AD风险基因的成员,其在迟发性AD和轻度认知障碍患者的大脑中表达水平降低。SORL1是逆转录酶的货物受体,能够将APP蛋白从内质网系统和BACE蛋白高活性的环境中转运至反面高尔基体进行重新修饰,也能直接调控APP的寡聚化来调控其蛋白水解过程。SORL1表达水平或活性的降低能够促进Aβ的积累。
TMEM163锌离子跨膜转运蛋白,是散发AD的一个GWAS风险基因。生物学功能上,TMEM163负责神经元突触上锌离子的内外流过程,包括参与突触小泡的释放。
SPRED2属于出芽蛋白家族Sprouty/SPRED family成员,参与由生长因子诱导的MAPK激酶级联过程的激活。遗传学上,SPRED2被证明是散发性AD的一个风险基因。本发明通过自行设计的SPRED2抗原表位多肽,检测AD患者血清及血浆中自身抗体水平并开发响应试剂,预测AD发生风险及病程发展程度,为临床治疗提供可靠参考。
CLU是脑内仅次于载脂蛋白APOE的第二大脂蛋白,是散发性AD的GWAS风险基因。生物学功能上,CLU可能参与β-淀粉样蛋白在脑与血浆之间的转运,在AD的致病机制中有助于调节大脑中β-淀粉样蛋白的清除。而β-淀粉样蛋白产生和清除的失衡是阿尔兹海默病发展的核心因素。
PTK2B是一种细胞质蛋白酪氨酸激酶,参与钙诱导的离子通道调节和激活图谱激酶信号通路。PTK2B作为代表增加钙通量的神经肽激活受体或神经递质之间的重要信号中间体,以及调节神经元活性的下游信号。其响应于细胞内钙浓度、烟碱乙酰胆碱受体激活、膜去极化或蛋白激酶C活化的增加,而经历快速的酪氨酸磷酸化和活化。在遗传学上,PTK2B是散发性AD的GWAS风险基因。磷酸化的PTK2B可与AD患者及转基因Tau鼠脑中磷酸化的Tau共定位,参与Tau的磷酸化和聚集等过程,是Tau毒性的早期标记物和体内调节剂。
TSPAN14是一个细胞膜表面四次跨膜蛋白,是散发AD的一个GWAS风险基因。生物学功能上,TSPAN14能够影响细胞膜内侧相关信号通路激酶的活性,包括对Notch信号通路的激活调控功能等。分布上,TSPAN14高表达于中枢神经系统和外周免疫细胞当中,具有调节神经免疫机制的功能。
FERMT2是细胞膜表面的粘着斑蛋白,是散发AD的一个GWAS风险基因。生物学功能上,FERMT2参与调控细胞骨架微管蛋白的结合活性,影响磷脂酰肌醇的结合活性,以及转化生长因子β受体的活性。在生物学过程中,FERMT2通过影响多个细胞表面受体参与的信号通路,参与如细胞分化、细胞局部合成等重要事件。FERMT2的功能调控异常在AD的疾病发展中起了关键作用。
ADAM10基因编码一个含有去整合素和金属蛋白酶结构域的蛋白质分子,是散发AD的一个GWAS风险基因,家族性AD中也发现多个ADAM10基因的功能性突变。在神经元中,ADAM10是最重要的酶之一,具有α-分泌酶活性,可用于淀粉样前体蛋白的蛋白水解加工。ADAM10与ADAM17一起切割骨髓细胞2(TREM2)上表达的触发受体的胞外域,产生可溶性TREM2(sTREM2),是脑内Aβ42清除的关键分子之一。ADAM10的功能调控异常在AD的疾病发展中起了关键作用。
本发明通过自行设计的抗原表位多肽,检测AD患者血清及血浆中自身抗体水平并开发响应试剂,预测AD发生风险及病程发展程度,为临床治疗提供可靠参考。
发明内容
抗原抗体的结合实际上只发生在抗原决定簇和抗体的抗原结合位点之间,二者在空间结构和空间构型上完全互补。因此抗原决定簇就可以代表整个蛋白与抗体结合的状态与亲和特征。传统酶联免疫法(ELISA)检测自身抗体主要以重组蛋白为抗原,需经过载体构建、转染、表达、筛选、纯化等一系列繁琐过程,生产成本昂贵。且完整蛋白空间结构复杂、抗原表位不易暴露,因此抗原抗体结合的特异性不强,导致信号检出率低。
基于此,有必要提供了检测阿尔兹海默病标志物ADAP自身抗体的抗原多肽。
为实现上述目的,本发明具体技术方案如下:
首先,提供了检测阿尔兹海默病标志物ADAP自身抗体的抗原多肽,所述抗原多肽包含如SEQ ID NO.1-8所示的氨基酸序列中的至少一种:
SORL1:CEVWTQRLHGGSAPLPQDRGFLVVQGDPR;
TMEM163:CIVVKAIHDLSTRLLPEVDDFLF;
SPRED2:MTEETHPDDDSYIVRVKAVVMTR;
CLU:TQGEDQYYLRVTTVASHTSDSDVPSG;
PTK2B:SGVSEPLSRVKLGTLRRPEGPAEPM;
TSPAN14:GVPFSCCVPDPAQKVVNTQCGYDVRIQ;
FERMT2:GIRMPDGCYADGTWELSVHVTDLNR;
ADAM10:FSDEFKVETSNKVLDYDTSHIYTGH;
或其片段、变体、融合物或衍生物、或所述其片段、变体或衍生物的融合物,所述变体包含与SEQ ID NO.1-8所示的氨基酸序列有至少55%,60%,65%,70%,75%,80%,85%,90%,95%,96%,97%,98%或99%同源性的氨基酸序列,纯度>95%,pH>7.0。
进一步地,提供了所述的抗原多肽在制备用于检测ADAP自身抗体的产品中的应用。
进一步地,所述的抗原多肽和/或ADAP自身抗体在制备阿尔兹海默病早期诊断试剂盒中的应用。
优选的,检测样本为血清或血浆。
进一步地,还提供了一种用于检测ADAP自身抗体和/或阿尔兹海默病的试剂盒,包括所述的抗原多肽。
优选的,所述抗原多肽是被包被于酶标板中。
优选的,所述抗原多肽在酶标板中包被浓度为5.0μg/ml。
优选的,还包括包被液、阳性对照、阴性对照、洗涤缓冲液、样品稀释分析液、二抗标准液、终止缓冲液、底物显色液中的至少一种。
进一步地,还提供了编码所述抗原多肽的核酸分子。
进一步地,还提供了含有所述核酸分子的重组载体。
进一步地,还提供了所述的抗原多肽或ADAP自身抗体或所述的核酸分子或所述的重组载体在制备治疗阿尔兹海默病药物中的应用。
进一步地,还提供了一种体外非诊断目的的ADAP自身抗体检测方法,包括使用所述的抗原多肽或所述的试剂盒检测样品中的ADAP自身抗体。
优选的,包括以下步骤:
(1)使用包被有所述的抗原多肽的酶标板进行分步加样分析;
(2)用酶标仪检测每孔中的光密度值,并用阳性样品比值表示抗体水平。
基于上述技术方案,本发明具有以下有益效果:
本发明应用ADAP抗原多肽检测到AD患者血清及血浆中的特异性自身抗体,并且该反应具有高特异性和高灵敏性,这种自身抗体可作为免疫标志物评估阿尔兹海默病的发病风险和痴呆相关的认知损害发展程度。这种抗原多肽及其抗体可用于制备阿尔兹海默病早期诊断试剂和开发治疗该疾病的靶向药物。抗原多肽所含的氨基酸序列为简单的线性多肽氨基酸序列,其对于现有重组蛋白的抗原而言,获得成本显著降低,而且与ADAP自身抗体的结合特异性强。
附图说明
图1 AD患者与健康对照血浆ADAP自身IgG抗体检测水平;
图2血浆ADAP自身IgG抗体水平与受试者MMSE认知评分相关性;
图3 8种ADAP自身抗体单靶点诊断ROC曲线;
图4 8种ADAP自身抗体联合诊断ROC曲线。
具体实施方式
以下实施例用于说明本发明,但不用来限制本发明的范围。若未特别指明,实施例中所用的技术手段为本领域技术人员所熟知的常规手段。
下述实施例所使用的实验方法如无特殊说明,均为常规方法。
下述实施例中所有的材料、试剂等,如无特殊说明,均可从商业途径获得。
含有SEQ ID NO.1-8所示氨基酸序列的抗原多肽由于含有特定的抗原决定簇,使其能够与ADAP自身抗体抗原结合位点发生特异识别和结合,从而提高了上述抗原多肽与待测样本中所含的ADAP自身抗体之间的特异反应,并提高两者的特异结合率。这样,将其与待测样本——如血清或血浆——中的ADAP自身抗体特异识别和结合后,能够检测出待测样本中ADAP自身抗体的含量水平,通过对自身抗体的含量水平判断,从而间接判断待测样本来源体的阿尔兹海默病发病风险和进展。例如ADAP自身抗体水平降低预示患者可能出现了有ADAP介导的Aβ清除失能,可以预测AD的发生风险及发生进程,指导临床医生对AD的早期诊断。其中,ADAP自身抗体可以是ADAP的特异性自身IgG抗体。
另外,上述抗原多肽所含的SEQ ID NO.1-8所示氨基酸序列为简单的线性多肽氨基酸序列,其对于现有重组蛋白的抗原而言,获得成本显著降低,而且与ADAP自身抗体的结合特异性强。鉴于此,本发明在公开候选检测表位的同时,亦对ELISA的检测手段进行改进。发明人遵循以下原则设计线性多肽抗原:1)选择细胞膜蛋白表面区域;2)选择不形成α-helix的序列;3)避免蛋白内部重复;4)避免同源性强的肽段;5)必须包含人白细胞二类抗原(HLA-II)系统的限制性表位。
基于上述原则,本发明运用生物信息学预测手段结合多个表位预测模拟软件,综合分析与抗原性相关的参数,设计了如SEQ ID NO.1-8所示的线性氨基酸多肽序列,分别对应8种ADAP自身抗体,所设计的抗原多肽在空间结构和构型上与目标抗体完全互补。其中SORL1抗原蛋白(NP_003096.2sortilin-related receptor preproprotein[Homosapiens])的序列如下SEQ ID NO.9所示,加框部分是抗原多肽片段以及在SORL1蛋白中的位置:
其中TMEM163抗原蛋白(NP_112185.1transmembrane protein 163[Homosapiens])的序列如下SEQ ID NO.10所示,加框部分是抗原多肽片段以及在TMEM163蛋白中的位置:
其中SPRED2抗原蛋白(NP_861449.2 sprouty-related,EVH1 domain-containingprotein 2isoform a[Homo sapiens])的序列如下SEQ ID NO.11所示,加框部分是抗原多肽片段以及在SPRED2蛋白中的位置:
其中CLU抗原蛋白(NP_001822.3 clusterin isoform 1 preproprotein[Homosapiens])的序列如下SEQ ID NO.12所示,加框部分是抗原多肽片段以及在CLU蛋白中的位置:
其中PTK2B抗原蛋白(AAH42599.1 PTK2B protein tyrosine kinase 2 beta[Homo sapiens])的序列如下SEQ ID NO.13所示,加框部分是抗原多肽片段以及在PTK2B蛋白中的位置:
其中TSPAN14抗原蛋白(NP_001121781.1 tetraspanin-14 isoform 2[Homosapiens])的序列如下SEQ ID NO.14所示,加框部分是抗原多肽片段以及在TSPAN14蛋白中的位置:
其中FERMT2抗原蛋白(NP_006823.1 fermitin family homolog 2 isoform 1[Homo sapiens])的序列如下SEQ ID NO.15所示,加框部分是抗原多肽片段以及在FERMT2蛋白中的位置:
其中ADAM10抗原蛋白(NP_001101.1 disintegrin and metalloproteinasedomain-containing protein 10 isoform 1 preproprotein[Homo sapiens])的序列如下SEQ ID NO.16所示,加框部分是抗原多肽片段以及在ADAM10蛋白中的位置:
在上文的基础上,本领域技术人员可以理解的是,还可以对所述的抗原多肽进行化学修饰,以便增加ADAP抗原多肽的抗原性和有助于多肽的包被处理。
上述抗原多肽可通过化学合成得到,也可以通过基因工程技术得到,此技术为本领域技术人员所熟知。本领域技术人员可以理解的是,可以有效地通过常规合成方法,合成上述ADAP抗原多肽,从而代替重组表达的生物合成方式。
实施例1
1.受试者信息:样本收集56份AD患者外周血样本,匹配健康组56份;性别、年龄匹配,具有可比性(P>0.05)。所有受试者均经MMSE认知评定和11C-labeled PittsburghCompound-B(PiB)PET检测后入组。基本人口学信息见表1。
表1:受试者基本人口学信息
2.利用抗原多肽进行检测:
(1)酶标板设计:每份血浆样本各设人ADAP抗原多肽双复孔,山羊多肽对照抗原(PC)双复孔和阴性对照双复孔(NC)。PC抗原与人类蛋白质组无同源性,目的是减低非特异性结合反应的干扰,PC的工作浓度范围10-20μg/ml。
(2)包被:抗原多肽用包被液(pH 7.4 0.01M PBS/0.1%NaN3)包被于96孔酶标板(COSTAR,美国),每孔100μl。ADAP抗原多肽包被浓度5.0μg/ml,PC抗原包被浓度为15μg/ml,4℃过夜。
(3)血浆孵育:0.01M PBS/0.005%TWEEN-20清洗每孔3遍,利用分析液(0.01M PBS+1%BSA)将血浆1:500稀释,每孔100μl,4℃过夜。
(4)二抗孵育:0.01M PBS/0.005%TWEEN-20清洗每孔5遍,利用分析液(同前)稀释辣根过氧化物酶标记的羊抗人IgG(美国,Sigma),每孔加200μl,25℃孵育2h。辣根过氧化物酶标记的羊抗人IgG ELISA工作范围:1:30000~1:50000。
(5)显色:0.01M PBS/0.005%TWEEN-20清洗每孔5遍,每孔加100μl3,3',5,5'-四甲基联苯胺(TMB)过氧化物酶底物(lnvtrogen,美国),室温避光15~30min。
(6)检测:每孔加50μl 10%H2SO4为反应终止液,10min内使用酶标仪(BioTeck ELx800,美国)检测OD值,检测波长为450nm,参考波长为630nm。
(7)数据分析:采用SPSS或类似统计学软件进行数据统计分析处理。所有检测样品取双复孔均值进行计算。采用阳性样品比值(PSR)来判定抗原抗体的结合程度。PSR计算方法如下:
PSR=[OD(ADAP)-OD(NC)]/[OD(PC)-OD(NC)]
获得各检测样本PSR数值后,采用秩和检验比较不同组别间的差异,以SBI平均值≥2倍方差(SD),一类错误水平a<0.05为阳性判定阈值。采用受试者特征曲线(ROC)进行诊断效能评价。采用皮尔森相关性分析IgG抗体水平与受试者认知评分间的相关性。ROC曲线是根据一系列不同的二分类方式(分界值或判定阈值),以真阳性率(灵敏度)为纵坐标,假阳性率(1-特异性)为横坐标绘制,以曲线下面积(AUC)判定诊断效能。AUC取值范围为0.5-1.0,越趋近于1,表征诊断效能越强。本发明采用统计学计算分析软件Graphpad Prism 7.0(Graphpad Software,美国)软件绘制ROC曲线,计算曲线下面积(AUC),以健康人PSR平均值-2SD判为阳性,判定灵敏度和特异度;进行Fisher's精确检验,检验一类错误水准为a=0.05。
(8)质控:各检测样本设置双复孔,取平均OD值。OD值离散度判定:离散度=(OD1-OD2)/(OD1+OD2)≤0.1,为有效结果;离散度>0.1,为无效结果。取100份健康人血浆等体积混合作为质控血(QC),代表人群本底水平。每个检测板设置2个QC血浆孔,以QC变异水平判定结果的稳定性。批内变异CV=每日各板QC孔SD值/每日各板QC孔均值×100%;批内变异需<10%。批间变异CV=所有批次QC孔SD值/所有批次QC孔均值×100%;批间变异需<20%。
3.检测结果:
如表2和图1所示,AD患者血浆中与8种ADAP抗原多肽结合的IgG抗体阳性率均显著低于健康对照组(P<0.001)。如表3和图2所示,血浆抗ADAP IgG抗体水平与受试者MMSE认知评分呈现显著正相关关系(P<0.001),即血浆抗ADAP IgG抗体可以预测受试者AD相关的痴呆表型发展程度相关,抗体水平越低,认识损害程度越高。如表4和图3所示,AD患者血浆抗ADAP IgG抗体ROC曲线下面积(AUC)均大于0.7,以95%特异性时抗体水平作为阳性阈值判定,得到的灵敏度均大于20%。以上数据充分表明,利用本发明所设计的抗原多肽检测得到的AD患者自身抗体IgG水平与正常健康对照组有显著性统计学差异。
多靶点的联合诊断能有效提升生物标志物在疾病中的诊断效力。本发明通过建立逻辑回归线性模型,将8个血浆抗ADAP IgG抗体检测值进行拟合。拟合后AD患者与健康对照的逻辑回归曲线具有最显著的统计学差异(B=10.449,P<1.0E-6)。ROC分析的曲线下面积AUC为0.89(见图4),以95%特异性时抗体水平作为阳性阈值判定,得到的灵敏度为73.2%,诊断效能表现远高于单靶点的应用。
表2:AD患者与健康对照血浆ADAP自身IgG抗体检测对比分析结果
表3:血浆ADAP自身IgG抗体水平与受试者MMSE认知评分相关性分析结果
表4:AD患者与健康对照血浆ADAP自身IgG抗体检测ROC曲线分析结果
虽然,上文中已经用一般性说明及具体实施方案对本发明作了详尽的描述,但在本发明基础上,可以对之作一些修改或改进,这对本领域技术人员而言是显而易见的。因此,在不偏离本发明精神的基础上所做的这些修改或改进,均属于本发明要求保护的范围。
Claims (12)
1.一种抗原多肽组合物,其特征在于,所述抗原多肽组合物包含如SEQ ID NO.1-8所示的8种氨基酸序列:
SORL1:CEVWTQRLHGGSAPLPQDRGFLVVQGDPR;
TMEM163:CIVVKAIHDLSTRLLPEVDDFLF;
SPRED2:MTEETHPDDDSYIVRVKAVVMTR;
CLU:TQGEDQYYLRVTTVASHTSDSDVPSG;
PTK2B:SGVSEPLSRVKLGTLRRPEGPAEPM;
TSPAN14:GVPFSCCVPDPAQKVVNTQCGYDVRIQ;
FERMT2:GIRMPDGCYADGTWELSVHVTDLNR;
ADAM10:FSDEFKVETSNKVLDYDTSHIYTGH。
2.根据权利要求1所述的抗原多肽组合物,其特征在于,所述抗原多肽组合物用于检测阿尔兹海默病标志物ADAP自身抗体或用于检测阿尔兹海默病。
3.根据权利要求1或2所述的抗原多肽组合物在制备用于检测ADAP自身抗体的产品中的应用,所述ADAP为阿尔兹海默病疾病相关蛋白(Alzheimer’s Disease AssociatedProtein),所述ADAP自身抗体为SORL1、TMEM163、SPRED2、CLU、PTK2B、TSPAN14、FERMT2或ADAM10的自身抗体。
4.根据权利要求1或2所述的抗原多肽组合物在制备阿尔兹海默病早期诊断试剂盒中的应用。
5.根据权利要求3或4所述的应用,其特征在于,检测样本为血清或血浆。
6.一种试剂盒,其特征在于,包括权利要求1或2所述的抗原多肽组合物。
7.一种用于检测ADAP自身抗体和/或阿尔兹海默病的试剂盒,其特征在于,包括权利要求1或2所述的抗原多肽组合物,所述ADAP为阿尔兹海默病疾病相关蛋白(Alzheimer’sDisease Associated Protein),所述ADAP自身抗体为SORL1、TMEM163、SPRED2、CLU、PTK2B、TSPAN14、FERMT2或ADAM10的自身抗体。
8.根据权利要求6或7所述的试剂盒,其特征在于,所述抗原多肽是被包被于酶标板中。
9.根据权利要求8所述的试剂盒,其特征在于,所述抗原多肽在酶标板中包被浓度为5.0μg/ml。
10.根据权利要求6-9任一项所述的试剂盒,其特征在于,还包括包被液、阳性对照、阴性对照、洗涤缓冲液、样品稀释分析液、二抗标准液、终止缓冲液、底物显色液中的至少一种。
11.编码权利要求1或2所述抗原多肽组合物的核酸分子。
12.含有权利要求11所述核酸分子的重组载体。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202211110518 | 2022-09-13 | ||
CN2022111105181 | 2022-09-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
CN116063447A CN116063447A (zh) | 2023-05-05 |
CN116063447B true CN116063447B (zh) | 2023-11-03 |
Family
ID=86175793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202211126807.0A Active CN116063447B (zh) | 2022-09-13 | 2022-09-16 | 用于检测adap自身抗体的抗原多肽及其应用 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN116063447B (zh) |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101372511A (zh) * | 2001-05-25 | 2009-02-25 | 美国联合生物医学公司 | 一种用于预防和治疗阿尔兹海默氏病的具有免疫原性的肽组合物 |
CN105164536A (zh) * | 2013-03-05 | 2015-12-16 | 兰道克斯有限公司 | 阿尔兹海默症诊断的组合物和方法 |
CN105641694A (zh) * | 2008-12-19 | 2016-06-08 | H.隆德贝克有限公司 | 用于治疗精神和行为障碍的对Vps10p-结构域受体家族的调节 |
EP3070096A1 (en) * | 2015-03-19 | 2016-09-21 | Ludwig-Maximilians-Universität München | A peptide or collection of peptides derived from amyloid precursor protein |
CN105969885A (zh) * | 2016-06-24 | 2016-09-28 | 江苏雄鸣医药科技有限公司 | 一种阿尔兹海默症的基因诊断试剂盒 |
CN106062563A (zh) * | 2014-01-28 | 2016-10-26 | 普雷德姆泰克有限公司 | 用于阿尔兹海默症的早期诊断的生物标志物及方法 |
CN109738653A (zh) * | 2019-01-11 | 2019-05-10 | 湖南诺琪生物科技有限公司 | 用于阿尔茨海默症的检测、诊断或风险预测的抗原蛋白组合以及包含其的试剂盒 |
CN112162101A (zh) * | 2020-10-13 | 2021-01-01 | 南京立顶医疗科技有限公司 | 一种检测阿尔兹海默病的生物标志物的试剂盒及其检测方法 |
-
2022
- 2022-09-16 CN CN202211126807.0A patent/CN116063447B/zh active Active
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101372511A (zh) * | 2001-05-25 | 2009-02-25 | 美国联合生物医学公司 | 一种用于预防和治疗阿尔兹海默氏病的具有免疫原性的肽组合物 |
CN105641694A (zh) * | 2008-12-19 | 2016-06-08 | H.隆德贝克有限公司 | 用于治疗精神和行为障碍的对Vps10p-结构域受体家族的调节 |
CN105164536A (zh) * | 2013-03-05 | 2015-12-16 | 兰道克斯有限公司 | 阿尔兹海默症诊断的组合物和方法 |
CN106062563A (zh) * | 2014-01-28 | 2016-10-26 | 普雷德姆泰克有限公司 | 用于阿尔兹海默症的早期诊断的生物标志物及方法 |
EP3070096A1 (en) * | 2015-03-19 | 2016-09-21 | Ludwig-Maximilians-Universität München | A peptide or collection of peptides derived from amyloid precursor protein |
CN105969885A (zh) * | 2016-06-24 | 2016-09-28 | 江苏雄鸣医药科技有限公司 | 一种阿尔兹海默症的基因诊断试剂盒 |
CN109738653A (zh) * | 2019-01-11 | 2019-05-10 | 湖南诺琪生物科技有限公司 | 用于阿尔茨海默症的检测、诊断或风险预测的抗原蛋白组合以及包含其的试剂盒 |
CN112162101A (zh) * | 2020-10-13 | 2021-01-01 | 南京立顶医疗科技有限公司 | 一种检测阿尔兹海默病的生物标志物的试剂盒及其检测方法 |
Also Published As
Publication number | Publication date |
---|---|
CN116063447A (zh) | 2023-05-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN106065028B (zh) | 新的自身免疫疾病的诊断 | |
JP2018153184A (ja) | 広汎性発達障害の診断および治療のための組成物および方法 | |
JP4757266B2 (ja) | バイオマーカー及びその使用 | |
TW201606307A (zh) | 阿茲海默症及其他神經退化性疾病之生物標記及診斷方法 | |
JPH10506990A (ja) | アルツハイマー病に関する細胞試験と診断指数 | |
CN109073661B (zh) | 用于神经学疾病的诊断的测定法 | |
US20100291597A1 (en) | Secretogranin and vgf peptide biomarkers and uses thereof | |
KR20190066027A (ko) | 진단 분석에 사용하기 위한 단백질 항원으로서 rep 단백질 | |
CN109738653A (zh) | 用于阿尔茨海默症的检测、诊断或风险预测的抗原蛋白组合以及包含其的试剂盒 | |
WO2021142963A1 (zh) | 用于阿尔兹海默症自身抗体检测的蛋白抗原组合及其应用 | |
JPWO2020032027A1 (ja) | アルツハイマー病の判定薬および判定方法 | |
CN116063447B (zh) | 用于检测adap自身抗体的抗原多肽及其应用 | |
CN109073660B (zh) | 可用于治疗湿性年龄相关性黄斑变性的预测性标志物 | |
CN116041481B (zh) | 一种用于检测trem2自身抗体的抗原多肽及其应用 | |
CN116064440B (zh) | 一种用于检测vkorc1自身抗体的抗原多肽及其应用 | |
US20140065610A1 (en) | Method for predicting clinical benefit in the treatment of neurodevelopmental, neurological or neuropsychiatric disorders | |
CN113138250B (zh) | 特征尿蛋白对covid-19轻重级进行分型的非诊断方法及应用 | |
CN116120404A (zh) | 用于检测干扰素自身抗体的抗原多肽、试剂盒及其应用 | |
EP3362087A1 (en) | BINDING ACTIVITY OF AMINOACYL-tRNA SYNTHETASE IN CHARCOT-MARIE-TOOTH (CMT) NEUROPATHY AND CMT-RELATED NEUROLOGICAL DISEASES | |
WO2006085122A2 (en) | Biomarkers and uses thereof | |
CN118184778A (zh) | 一种AD7c-NTP单克隆抗体及其应用 | |
CN117723759A (zh) | 血浆蛋白生物标志物组合及其应用和可用于区分多种儿童青少年精神疾病的诊断系统 | |
TWI606060B (zh) | 用於檢測神經性乙醯膽鹼受器阿爾法七次單位抗體之多肽分子 | |
CN115104029A (zh) | 用于检测和监测全身性炎症的非侵入性测定法 | |
May et al. | Highly Immunoreactive IgG Antibodies Directed against a Set of Twenty Human |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant |