CN106053831A - Kit for detecting autoimmune disease - Google Patents
Kit for detecting autoimmune disease Download PDFInfo
- Publication number
- CN106053831A CN106053831A CN201610393707.2A CN201610393707A CN106053831A CN 106053831 A CN106053831 A CN 106053831A CN 201610393707 A CN201610393707 A CN 201610393707A CN 106053831 A CN106053831 A CN 106053831A
- Authority
- CN
- China
- Prior art keywords
- trem
- autoimmune disease
- cell
- dna
- aptamer
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/115—Aptamers, i.e. nucleic acids binding a target molecule specifically and with high affinity without hybridising therewith ; Nucleic acids binding to non-nucleic acids, e.g. aptamers
-
- 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
-
- 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
- C12N2310/00—Structure or type of the nucleic acid
- C12N2310/10—Type of nucleic acid
- C12N2310/16—Aptamers
-
- 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
- G01N2333/705—Assays involving receptors, cell surface antigens or cell surface determinants
- G01N2333/70503—Immunoglobulin superfamily, e.g. VCAMs, PECAM, LFA-3
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2800/00—Detection or diagnosis of diseases
- G01N2800/10—Musculoskeletal or connective tissue disorders
- G01N2800/101—Diffuse connective tissue disease, e.g. Sjögren, Wegener's granulomatosis
- G01N2800/104—Lupus erythematosus [SLE]
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2800/00—Detection or diagnosis of diseases
- G01N2800/24—Immunology or allergic disorders
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Chemical & Material Sciences (AREA)
- Molecular Biology (AREA)
- Immunology (AREA)
- Genetics & Genomics (AREA)
- Urology & Nephrology (AREA)
- Biotechnology (AREA)
- Hematology (AREA)
- Physics & Mathematics (AREA)
- Microbiology (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Food Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Medicinal Chemistry (AREA)
- Cell Biology (AREA)
- General Physics & Mathematics (AREA)
- Pathology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Organic Chemistry (AREA)
- General Engineering & Computer Science (AREA)
- Zoology (AREA)
- Analytical Chemistry (AREA)
- Wood Science & Technology (AREA)
- Plant Pathology (AREA)
- Biophysics (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
Abstract
The invention relates to a kit for detecting autoimmune disease. SLE (Systemic Lupus Erythematosus) is a diffuse and systemic autoimmune disease, the main pathogenesis is the formation of autoantibodies and immune complexes, and multiple organs and systems are often involved in the development process of the disease. Detection methods in the prior art havecertain limitations and are not suitable for low-cost and large-area promotion. The kit can identify whether a patient suffers from SLE by detecting blood, thereby being capable of rapidly and efficiently detecting SLE. The kit is easy to prepare.
Description
Technical field
The present invention relates to biological technical field, particularly to a kind of test kit for autoimmune disease detection.
Background technology
Toll-like receptor (Toll-like receptors, TLR) is the classical mode identification receptor of inherent immunity cell,
It identifies pathogen-associated molecular pattern, starts innate immune response, and determines follow-up adaptive immune response direction and reaction
Intensity, thus by the strict regulation and control of body immune system.The immunoregulation of TLR signal includes negative regulation and is just regulating and controlling, and marrow
Like cell expresses triggering receptor (Triggering receptor expressed on myeloid cells, TREM) family
The member of the one newfound immunoglobulin superfamily of class, TLR signal immunoregulatory molecules, can be by amplifying or suppression TLR letter
Number thus regulate and control immune response intensity, avoid the generation of excessive inflammatory response and autoimmune disease.TREM family at present
Race contain TREM-1, TREM-2, TREM-3, TREM sample transcription factor 1 (TREM like transcript1, TLT-1) and
Many Receptor member of TLT-2, wherein TREM-1 can strengthen inflammatory reaction, positive regulation autoimmune disease develops;
In contrast, TREM-2 is main in autoimmune plays negative regulation effect, the differentiation and maturation of scalable various kinds of cell;And for
TLT-1, the most more thinks that it is a Class Activation receptor, participates in platelet activation, the process of gathering;Similar, TLT-2
Leukocyte activation can be promoted, T cell is had stimulation.TREM-1 is the TREM family activated form receptor of report in 2000, and
And along with the research to its mechanism of action, find that it plays important work in part autoimmune disease develops
With, now a summary is made with regard to TREM-1 molecule and the progress in autoimmune disease thereof.
It has now been found that TREM gene mapping is in No. 6 chromosomes of people.Outside first Bouchon etc. find that TREM-1 is expressed in
Neutrophilic granulocyte in week blood, the inherent immunity cell surface such as mononuclear cell, the transmembrane glycopeptide being made up of 234 aminoacid
In vain, which includes extracellular region, cross-film district containing lysine residue and the shortage being made up of independent immunoglobulin V-structure territory
The intracellular region in intrinsic signal territory.Increasing research display TREM-1 also can express at natural killer cell, dendron in recent years
Shape cell, airway epithelial cell, hepatic endothelial cells etc..
TREM-1 is mainly with membrane surface molecule and shla molecule (Soluble TREM-1, sTREM-1) two kinds expression
Form exists.After the TREM-1 molecule on film surface is combined with part according to its construction features, activate a series of signal path, adjust
Control inflammatory reaction and induction immunne response.There are two kinds of hypothesis in source for sTREM-1 at present: one is that TREM-1 shears variation
Lacking the secretion hypotype in cross-film district, two is the result under the TREM-1 Proteolytic enzyme mechanism of film surface, and tests proof on antibacterial
Lipopolysaccharide (Lipopolysaccharides, LPS) stimulate under person monocytic cell and neutrophilic granulocyte cultivation in, metal egg
White enzyme inhibitor can increase the stability of cell surface TREM-1, reduce the release [5] of sTREM-1.Although TREM-1's is natural
Part determines the most completely, but it expresses at human blood platelets surface and Peritonitis, endotoxemia little to have research to speculate
Surfaces of granulocytes in mouse model, but to obtain definite answer, still need to further study confirmation.
Prior art has had substantial amounts of evidence to show TREM-1 and systemic lupus erythematosus (sle) (Systemic lupus
Erythematosus, SLE) there is great dependency.SLE is the autoimmune disease of a kind of diffusivity, general,
Principal pathogenetic mechanism is the formation of autoantibody and immune complex, often involves multiple organ and system in disease progression.
The cause of disease of SLE and pathogenesis are complicated, diverse clinical manifestations, and infection is one of reason of disease triggering, is also to fall ill simultaneously
Journey increases the weight of the common factors of the state of an illness.There is research that SLE fever patient is divided into disease activity group and concurrent infection group, by detection
In patients serum, sTREM-1 level finds that concurrent infection patient is apparently higher than disease activity patient.And up-to-date research report
Road is pointed out, sTREM-1 is up-regulated in SLE patients serum.
Prior art detects the amount of TREM-1 albumen typically by being carried out by enzyme linked immunoassay after antibodies
Detection by quantitative, but this detection method needs to provide corresponding antibody for oneself, owing to the preparation of antibody requires higher, and prepares multiple
Miscellaneous, there is huge limitation in the detection.
SELEX technology is a kind of new combinatorial chemistry technique grown up early 1990s.Utilize this technology can
The aptamer affine with target substance height to screen specificity from random single chain oligonucleotide library.Its basic ideas are
One single stranded oligonucleotide storehouse of iii vitro chemical synthesis, mixes with target substance, forms target substance-nucleic acid complexes, and eluting is not associated with
Nucleic acid, separate the nucleic acid molecules that is combined with target substance, and carry out PCR amplification with this nucleic acid molecules for template, enter back into lower whorl
Screening.By the screening repeated and amplification, some are not combined or have with target substance low-affinity, middle affinity with target substance
Nucleic acid molecules is washed away, and with leather G material have the nucleic acid molecules of strong affinity from the biggest with hangar point the most out, and pure
Spend carrying out and increase with SELEX process, finally occupy the great majority (> about 90% in storehouse).From Tuerk and Ellington etc.
First use this technology screening to specific adsorption phage T4DNA polymerase and the specific nucleic acid aptamers of organic dye molecule
After, through the development of more than ten years, SELEX technology has become as a kind of important grinds the means of making internal disorder or usurp and instrument.Therefore, selex is used
Technology, screening specifically combines the aptamers of TREM-1 and has the most important meaning.
Summary of the invention
Technical scheme is realized by following steps:
It is an object of the invention to provide the nucleic acid aptamer sequence of a kind of TREM-1.
In the present invention, the aptamer (sequence 1-24) of described TREM-1 can specific bond TREM-1.
The present invention further objective is that the purposes providing described nucleic acid aptamer sequence.According to this sequence in the present invention
Row application, can be further used for preparing the test kit of specific binding TREM-1.
From the random oligo DNA library of external synthesis, (5'-CGTTAAGACGAGTTGGCCAG-N36-
AATGACCAGTGAAGCTTGAC-3'), wherein N36 is 36 random oligonucleotides;Therefrom filter out and TREM-1 specific bond
Aptamer;The sequence primer P1:CGTTAAGACGAGTTGGCCAG that will filter out;Primer P2:
GTCAAGCTTCACTGGTCATT, carries out expanding and carry out TA and is cloned into pMD19-T carrier (winning photo bio company purchased from Shanghai),
Convert DH5a antibacterial (purchased from Beijing Tian Gen biotech firm);Choose white colony to carry out after PCR determines positive colony, extracting plasmid
And sequencing reaction, upper sequencer.
The present invention uses in-vitro screening (SELEX) technology of aptamer, with TREM-1 for just sieve target sieving with
The aptamer of TREM-1 specific bond, prepares the sequence with specific bond TREM-1, named aptamers in the present invention
TREM-1-1~24.Sequence is as follows:
TREM-1-1:CGTTAAGACGAGTTGGCCAGCTATATCCTACCTTATACCTATATACTTTACTCCTAAATG
ACCAGTGAAGCTTGAC;
TREM-1-2:CGTTAAGACGAGTTGGCCAGTAACCCCACAATTTAACAACTTCTTTTCTTATCAACAATG
ACCAGTGAAGCTTGAC;
TREM-1-3:CGTTAAGACGAGTTGGCCAGCCTCTCACCTACCCCTATCTCTTACTACCCTCTCCTAATG
ACCAGTGAAGCTTGAC;
TREM-1-4:CGTTAAGACGAGTTGGCCAGTCCATCTCCCCATCCCTAATATACTACTTTTACCACAATG
ACCAGTGAAGCTTGAC;
TREM-1-5:CGTTAAGACGAGTTGGCCAGCATAAAAACTATTCATACTCCTACATACACCCCAACAATG
ACCAGTGAAGCTTGAC;
TREM-1-6:CGTTAAGACGAGTTGGCCAGTAAATTTTTCCTTATACTCTTCCCATTCAACAATTTAATG
ACCAGTGAAGCTTGAC;
TREM-1-7:CGTTAAGACGAGTTGGCCAGTCCACATCTATAAAATATTATCAATCTCTCTCTATAAATG
ACCAGTGAAGCTTGAC;
TREM-1-8:CGTTAAGACGAGTTGGCCAGAAAACCACTTTATTACCCTTTCAATCACAACACCATAATG
ACCAGTGAAGCTTGAC;
TREM-1-9:CGTTAAGACGAGTTGGCCAGTACTTCTAATCTTTCCCATACCTCAATTCCATCCATAATG
ACCAGTGAAGCTTGAC;
TREM-1-10:CGTTAAGACGAGTTGGCCAGCCTCATCCATTCACTCTATTTTTATATCTTTCCTCCAAT
GACCAGTGAAGCTTGAC;
TREM-1-11:CGTTAAGACGAGTTGGCCAGCATTACCACAATCTTCATTTTATACCATTATATAAAAAT
GACCAGTGAAGCTTGAC;
TREM-1-12:CGTTAAGACGAGTTGGCCAGTTATATAAACCTTATACTCAACTTCTTCCCCATAAAAAT
GACCAGTGAAGCTTGAC;
TREM-1-13:CGTTAAGACGAGTTGGCCAGTCACACTTTAACCTACATCCCCTCACATACCACTAAAAT
GACCAGTGAAGCTTGAC;
TREM-1-14:CGTTAAGACGAGTTGGCCAGAATCCTCATTTTCTCAATTCCCAACTTCAACCCCACAAT
GACCAGTGAAGCTTGAC;
TREM-1-15:CGTTAAGACGAGTTGGCCAGTCTTTTCCCTTTATCAACACATATCTTCTATCATTTAAT
GACCAGTGAAGCTTGAC;
TREM-1-16:CGTTAAGACGAGTTGGCCAGTCCTCTCTATCAACTCTCAACACACTCTCCAAATCCAAT
GACCAGTGAAGCTTGAC;
TREM-1-17:CGTTAAGACGAGTTGGCCAGCCTCAATTTCCCTAACAACTACAACCTCTATAATCTAAT
GACCAGTGAAGCTTGAC;
TREM-1-1:CGTTAAGACGAGTTGGCCAGCATACTTAATATAAAATCCACTTTCCTCCTACATATAATG
ACCAGTGAAGCTTGAC;
TREM-1-18:CGTTAAGACGAGTTGGCCAGCTCAAAACTCCATTCTCTACACACCTTTACATCCTCAAT
GACCAGTGAAGCTTGAC;
TREM-1-19:CGTTAAGACGAGTTGGCCAGCTATTCTTTATTTTATTCATCCCTCTTACTCCAATCAAT
GACCAGTGAAGCTTGAC;
TREM-1-20:CGTTAAGACGAGTTGGCCAGAATCTCTCTCCTCATATTCCACATCTCCATCATATAAAT
GACCAGTGAAGCTTGAC;
TREM-1-21:CGTTAAGACGAGTTGGCCAGTACACATCTCTCATTTAATCAACACACCTTTTACCTAAT
GACCAGTGAAGCTTGAC;
TREM-1-22:CGTTAAGACGAGTTGGCCAGACAATATACTATATACCCATAAACTTAAATCTCAACAAT
GACCAGTGAAGCTTGAC;
TREM-1-23:CGTTAAGACGAGTTGGCCAGTATTAATCATCTCCATCTACTTAATTACCCCTCTCTAAT
GACCAGTGAAGCTTGAC;
TREM-1-24:CGTTAAGACGAGTTGGCCAGCCAATCATCCCACATCAAAATACCAATAACTTATCAAAT
GACCAGTGAAGCTTGAC;
The aptamer of the present invention may be used for building test kit, and this test kit may be used for specific separation and quantitatively inspection
Survey TREM-1.
Beneficial effects of the present invention: obtain a kind of can the test kit of specific detection TREM-1, this test kit low cost
Honest and clean, can use with spread.
Detailed description of the invention
Embodiment 1: the acquisition of albumen
Generation BWZ.36/hTREM-l:DAP12:NFAT-LacZ cell line (this of people's TREM-1:DAP12 stable cell lines
Literary composition also known as " BWZ/hTREM-Ι reports cell ") derive from BW5147T cell (mice Ofes thymic lymphoma cells system, ATCC
TIB-47, LGC Standards, Middelsex, UK), and report containing the LacZ regulated by 4 copy NFAT promoter elements
Construct (sees Karttunen, J. and Shastri, N. (1991) Proc.Natl.Acad.Sci.USA 88,3972-3976
And Fiering, S, Northrop, J.P, Nolan, G.P, Matilla, P, Crabtree, G.R. and
Herzenberg, L.A. (1990) Genes Dev.4,1823-1834).Use Superfect transfection reagent (catalog number (Cat.No.)
301305, Qiagen Nordic, Denmark), general use TREM-1 cDNA (Gene Bank Ref.ID:NM_018643.2,
Sino Biological Inc., Beijing, China) as template and oligomerization 5'
TAGTAGGGATCCGCTGGTGCACAGGAAGG and 5'TAGTAGGCGGCCGCTTCGTGGGCCTAG GGTAC is as primer gram
Grand to pIREShyg carrier GenBank accession number U89672 (catalog number (Cat.No.) 6061-l, Clontech Laboratories, CA,
USA) TREM/DAP12/pMX-IRES carrier (encoding 786bp TREM-1 from SmaI site to BamHI site) is transfected into
PLAT-E package cell line (is provided by W.Yokoyama, Washington University;Or, catalog number (Cat.No.) RV-101, RV-
101, Cell Biolabs Inc, Bio-Mediator KY, Vantaa, Finland).Used as described below containing TREM/DAP12/
The PLAT-E supernatant of pMX-IRES virion infects BWZ.36 cell: by 2xl05Individual BWZ.36 cell is trained in 6 orifice plates
Support, replace medium to I.5ml contain the supernatant of virion+8mg/ml polybrene (polybrene).After 6-8 hour, will
1.5ml normal incubation medium is added in plate, makes cell incubation 24 hours again.By the BWZ.36 cell line of stable expression TREM-I with anti-
TREM-I monoclonal antibody (clone 21C7) dyeing, and separated by cell sorting.The cell of isolated is cultivated,
Results obtain TREM-1 albumen, and rich protein makes protein concentration be 100mg/mL, 4 degree of storages.
Embodiment 2 aptamer screens
From the random oligo DNA library of external synthesis, (5'-CGTTAAGACGAGTTGGCCAG-N36-
AATGACCAGTGAAGCTTGAC-3'), wherein N36 is 36 random oligonucleotides;
Primer P1:CGTTAAGACGAGTTGGCCAG;Primer P2:GTCAAGCTTCACTGGTCATT.
L () TREM-1 albumen 1mg adds in 96 hole elisa plates after being dissolved in 200 μ l PBS, 4 DEG C overnight.
(2) albumen is coated hole PBS and washs after 6 times, adds 200 μ l 3%BSA (purchased from the raw work in Shanghai), hatches 2 hours.
Meanwhile, blank 96 hole elisa plates add 200 μ l 3%BSA 37 DEG C and hatch 2 hours.
(3) ssDNA pool (first run consumption is 800pmol) is dissolved in 200 μ l 1*SHCMK, 95 DEG C of degeneration 5min.
It is immediately placed on 10min on ice so that it is be rapidly decreased to room temperature, it is to avoid ssDNA renaturation becomes double-strand.
(4) ssDNA is added in the blank ELISA hole that PBS washs 6 times, hatch 2 hours for 37 DEG C.
(5) supernatant proceeds to PBS and washs the albumen of 6 times and be coated in hole, 37 DEG C hatch 2 hours after PBS wash 6 times.
(6) the enzyme mark hole combining ssDNA is resuspended with 200 microliters Elution Buffer, 95 DEG C of heating 5min, takes supernatant, warp
Cross ethanol precipitation DNA, be dissolved in Millipore water, as the template of next round screening.
(7) take 5 μ l PCR primer and be splined on 5wt% agarose (purchased from the raw work in Shanghai), observe pillar location the most correct.
After the first run, the amount in ssDNA level storehouse of input gradually decreases, and 12 circulations are so repeated.
12nd amplification taking turns screening product and purification: take turns the ssDNA sequence that screening obtains by the 12nd, use primer P1, primer
P2 expands.100 μ l PCR amplification after system add 600pl combine liquid BB (20mmol/L Hepes (pH7.35),
100mmol/L NaCl, 5.5mmol/L KCl, l.5mmol/L CaC12, lmmol/L MgC12, l%BSA), fully mix.Will
Previous step gained solution adds in adsorption column EC (adsorption column is put in collecting pipe), and it is centrifugal that room temperature places lmin, 12000rpm
60s, outwells the waste liquid in collecting pipe.Adding 700pmol rinsing WB (in conjunction with liquid BB+0.05%Tween20), 12000rpm is centrifuged
30s, discards waste liquid.Adding 500pmol rinsing liquid WB, 12000rpm is centrifuged 30s, discards waste liquid.Adsorption column EC is put back to empty receipts
In collector, 12000rpm is centrifuged 2min.Take out adsorption column EC, put in a clean centrifuge tube, at the pars intermedia of adsorbed film
Position adds the elution buffer EB of 65 DEG C of water-bath preheatings of 20pmol, and room temperature places 2min, and 12, OOOrpm are centrifuged lmin.By obtain
Solution rejoins in adsorption column, recentrifuge lmin.
The clone of PCR purified product: take 1 μ l amplified production, be connected under the effect of T4DNA ligase with carrier PGM-T,
Be transformed into competent cell again, take proper volume be spread evenly across the LA containing IPTG, x-gal, antibiotic (Amp) put down
Plate, is inverted culture dish, within 12-16 hour, carries out " indigo plant-white macula screening " in 37 DEG C of cultivations.Order-checking: screen flat board with inoculating loop picking
On single white colony in the LB fluid medium containing Amp, 37 DEG C of overnight incubation.Take bacterium solution lml in centrifuge tube, after sealer
Serve sea raw work order-checking.
Sequencing result finds wherein have 24 nucleic acid aptamer sequence and TREM-1 to have the strongest affinity, these 24
Sequence is respectively: shown in SEQ ID NO:1-24.
The TREM-1 of embodiment 3 specificity high-affinity combines the performance measurement of aptamer
Aptamer taking 1.5 μ g respectively, digests 1h with calf intestinal alkaline phosphatase (CIP) 37 DEG C, purification reclaims and removes phosphoric acid
The RNA changed;By T4 polynucleotide kinase labelling [γ-32P] ATP in dephosphorylized adaptor molecules end.10nmol is put
The aptamer of penetrating property labelling TREM-1 protein 37 DEG C with variable concentrations (1-200nM) respectively hatches 30min, each group reactant liquor warp
Nitrocellulose filter filters, and washs filter membrane, is dried filter membrane, and liquid scintillation counter measures the exit dose of residual, same sample on filter membrane
Parallel do twice mensuration.Calculate the dissociation constant of each aptamer and TREM-1 albumen.Result is as follows:
As can be seen from the above results, 24 aptamers of the present invention have the strongest binding characteristic, in prior art
Also the aptamer not having described binding characteristic can be in conjunction with TREM-1 albumen.
Embodiment 4 degrading activity analysis
Be respectively adopted human albumin, TREM-1, TREM-2, TREM-3, TLT-1 and TLT-2 respectively with 24 aptamers
Carry out specific detection, through binding tests find, these aptamers do not combine with these albumen, and only with TREM-1 egg
White combination keeps higher specificity.
By described aptamer, take 0.2ug, be respectively placed in the serum of room temperature, aqueous solution, place surrounding.Pass through RT-
PCR detects, and finds its Stability Analysis of Structures of placement of three weeks, is not degraded.
Embodiment 5 clinical trial analysis
Taking 50 groups of clinical serum samples, be respectively as follows: SLE fever diseases activity group 20 example, SLE generates heat concurrent infection group 20
Example, 10 examples are normal person.
24 aptamers are built standard product examine with standard substance TREM-1 albumen respectively by the way of immuno magnetic cell separation
The standard curve surveyed.Then go 10 μ l to join in sterile centrifugation tube respectively in 50 groups of clinical serum samples, add PBS solution shake
Swing dissolving.Coupling have 24 groups of aptamers of magnetic bead and the serum solution mixing of 50 groups hatch 20 minutes (a kind of aptamers respectively
50 groups of serum samples of corresponding detection), then Magneto separate, the TREM-1 albumen of corresponding separation can be obtained, pass through standard curve
Concentration Testing obtains corresponding protein concentration result, and by detection, for same serum, the concentration that each aptamer detects is several
There is no gap;And the concentration between each group exists obvious difference, using the meansigma methods of the protein concentration of normal person as comparison,
Result is as follows:
TREM-1 albumen relative concentration (corresponding meansigma methods) | |
SLE fever diseases activity group | 1.7 |
SLE generates heat concurrent infection group | 3.2 |
Normal person | 1 |
As can be seen from the above results, the TREM-1 protein concentration of SLE heating concurrent infection group significantly increases, and normally
Can significantly make a distinction between people.Illustrate that the aptamer of the present invention may be used for detection and analyzes.
Embodiment 6TREM-1 molecule barrier detects
According to the method for prior art, block TREM-1 when identifying aptamer: include that (a) cultivates and express TREM-1, letter
Number transducin and the first cell of report construct;B () is by the first cell, (such as TREM-1 joins with activity compound
Body) or activate neutrophil cell incubation together time measure the activity of described cell;C () makes the first cell and activity chemical combination
The coculture of the neutrophil cell of thing (such as TREM-1 part) or activation contacts with TREM-I aptamer;(d) record
The activity of the first cell is less than the activity measured in (b).According to described method, applicant is found by detection, adaptive in 24
Son all can block the activity of TREM-1.
Above-described embodiment is the present invention preferably embodiment, but embodiments of the present invention are not by above-described embodiment
Limit, the change made under other any spirit without departing from the present invention and principle, modify, substitute, combine, simplify,
All should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Sequence table
Brightness during < 110 Pan >
< 120 > mono-kind is for the test kit of autoimmune disease detection
〈210〉1
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-1
CGTTAAGACGAGTTGGCCAGCTATATCCTACCTTATACCTATATACTTTACTCCTAAATGACCAGTGAAGCTT
GAC;
〈210〉2
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-2
CGTTAAGACGAGTTGGCCAGTAACCCCACAATTTAACAACTTCTTTTCTTATCAACAATGACCAGTGAAGCTT
GAC;
〈210〉3
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-3
CGTTAAGACGAGTTGGCCAGCCTCTCACCTACCCCTATCTCTTACTACCCTCTCCTAATGACCAGTGAAGCTT
GAC;
〈210〉4
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-4
CGTTAAGACGAGTTGGCCAGTCCATCTCCCCATCCCTAATATACTACTTTTACCACAATGACCAGTGAAGCTT
GAC;
〈210〉5
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-5
CGTTAAGACGAGTTGGCCAGCATAAAAACTATTCATACTCCTACATACACCCCAACAATGACCAGTGAAGCTT
GAC;
〈210〉6
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-6
CGTTAAGACGAGTTGGCCAGTAAATTTTTCCTTATACTCTTCCCATTCAACAATTTAATGACCAGTGAAGCTT
GAC;
〈210〉7
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-7
CGTTAAGACGAGTTGGCCAGTCCACATCTATAAAATATTATCAATCTCTCTCTATAAATGACCAGTGAAGCTT
GAC;
〈210〉8
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-8
CGTTAAGACGAGTTGGCCAGAAAACCACTTTATTACCCTTTCAATCACAACACCATAATGACCAGTGAAGCTT
GAC;
〈210〉9
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-9
CGTTAAGACGAGTTGGCCAGTACTTCTAATCTTTCCCATACCTCAATTCCATCCATAATGACCAGTGAAGCTT
GAC;
〈210〉10
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-10
CGTTAAGACGAGTTGGCCAGCCTCATCCATTCACTCTATTTTTATATCTTTCCTCCAATGACCAGTGAAGCTT
GAC;
〈210〉11
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-11
CGTTAAGACGAGTTGGCCAGCATTACCACAATCTTCATTTTATACCATTATATAAAAATGACCAGTGAAGCTT
GAC;
〈210〉12
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-12
CGTTAAGACGAGTTGGCCAGTTATATAAACCTTATACTCAACTTCTTCCCCATAAAAATGACCAGTGAAGCTT
GAC;
〈210〉13
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-13
CGTTAAGACGAGTTGGCCAGTCACACTTTAACCTACATCCCCTCACATACCACTAAAATGACCAGTGAAGCTT
GAC;
〈210〉14
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-14
CGTTAAGACGAGTTGGCCAGAATCCTCATTTTCTCAATTCCCAACTTCAACCCCACAATGACCAGTGAAGCTT
GAC;
〈210〉15
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-15
CGTTAAGACGAGTTGGCCAGTCTTTTCCCTTTATCAACACATATCTTCTATCATTTAATGACCAGTGAAGCTT
GAC;
〈210〉16
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-16
CGTTAAGACGAGTTGGCCAGTCCTCTCTATCAACTCTCAACACACTCTCCAAATCCAATGACCAGTGAAGCTT
GAC;
〈210〉17
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-17
CGTTAAGACGAGTTGGCCAGCCTCAATTTCCCTAACAACTACAACCTCTATAATCTAATGACCAGTGAAGCTT
GAC;
〈210〉18
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-18
CGTTAAGACGAGTTGGCCAGCTCAAAACTCCATTCTCTACACACCTTTACATCCTCAATGACCAGTGAAGCTT
GAC;
〈210〉19
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-19
CGTTAAGACGAGTTGGCCAGCTATTCTTTATTTTATTCATCCCTCTTACTCCAATCAATGACCAGTGAAGCTT
GAC;
〈210〉20
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-20
CGTTAAGACGAGTTGGCCAGAATCTCTCTCCTCATATTCCACATCTCCATCATATAAATGACCAGTGAAGCTT
GAC;
〈210〉21
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-21
CGTTAAGACGAGTTGGCCAGTACACATCTCTCATTTAATCAACACACCTTTTACCTAATGACCAGTGAAGCTT
GAC;
〈210〉22
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-22
CGTTAAGACGAGTTGGCCAGACAATATACTATATACCCATAAACTTAAATCTCAACAATGACCAGTGAAGCTT
GAC;
〈210〉23
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-23
CGTTAAGACGAGTTGGCCAGTATTAATCATCTCCATCTACTTAATTACCCCTCTCTAATGACCAGTGAAGCTT
GAC;
〈210〉24
〈211〉76
〈212〉DNA
< 213 > artificial sequence
〈400〉TREM-1-24
CGTTAAGACGAGTTGGCCAGCCAATCATCCCACATCAAAATACCAATAACTTATCAAATGACCAGTGAAGCTT
GAC;
Claims (4)
1. the test kit being used for detecting autoimmune disease, it is characterised in that: it comprises can specific binding TREM-1 albumen
Aptamer.
2. test kit as claimed in claim 1, it is characterised in that: described aptamer is SEQ ID No.1-24 any bar sequence
Shown in row, or the replacement of one or several nucleotide carried out on the basis of this sequence, and retain its activity.
3. the test kit described in any one of claim 1-2 is in the application of detection autoimmune disease damage.
4. the application in the reagent preparing detecting system lupus erythematosus of the test kit described in any one of claim 1-2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610393707.2A CN106053831A (en) | 2016-06-05 | 2016-06-05 | Kit for detecting autoimmune disease |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610393707.2A CN106053831A (en) | 2016-06-05 | 2016-06-05 | Kit for detecting autoimmune disease |
Publications (1)
Publication Number | Publication Date |
---|---|
CN106053831A true CN106053831A (en) | 2016-10-26 |
Family
ID=57170391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610393707.2A Pending CN106053831A (en) | 2016-06-05 | 2016-06-05 | Kit for detecting autoimmune disease |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106053831A (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101687916A (en) * | 2007-01-16 | 2010-03-31 | 惠氏公司 | Inflammation treatment, detection and monitoring via trem-1 |
CN104073496A (en) * | 2013-02-28 | 2014-10-01 | 湖南中医药大学 | Sequence and use of aptamer of colibacillus outer membrane protein TolC |
CN104204803A (en) * | 2012-02-09 | 2014-12-10 | 米密德诊断学有限公司 | Signatures and determinants for diagnosing infections and methods of use thereof |
CN104220456A (en) * | 2012-02-15 | 2014-12-17 | 诺和诺德A/S(股份有限公司) | Antibodies that bind and block triggering receptor expressed on myeloid cells-1 (TREM-1) |
WO2015018936A1 (en) * | 2013-08-09 | 2015-02-12 | Inotrem | Methods and kits for predicting the risk of having a cardiovascular disease or event |
CN104830867A (en) * | 2015-06-07 | 2015-08-12 | 杨洋 | Aptamer capable of being specifically combined with DKK1 protein in cancer cells |
-
2016
- 2016-06-05 CN CN201610393707.2A patent/CN106053831A/en active Pending
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101687916A (en) * | 2007-01-16 | 2010-03-31 | 惠氏公司 | Inflammation treatment, detection and monitoring via trem-1 |
CN104204803A (en) * | 2012-02-09 | 2014-12-10 | 米密德诊断学有限公司 | Signatures and determinants for diagnosing infections and methods of use thereof |
CN104220456A (en) * | 2012-02-15 | 2014-12-17 | 诺和诺德A/S(股份有限公司) | Antibodies that bind and block triggering receptor expressed on myeloid cells-1 (TREM-1) |
CN104073496A (en) * | 2013-02-28 | 2014-10-01 | 湖南中医药大学 | Sequence and use of aptamer of colibacillus outer membrane protein TolC |
WO2015018936A1 (en) * | 2013-08-09 | 2015-02-12 | Inotrem | Methods and kits for predicting the risk of having a cardiovascular disease or event |
CN104830867A (en) * | 2015-06-07 | 2015-08-12 | 杨洋 | Aptamer capable of being specifically combined with DKK1 protein in cancer cells |
Non-Patent Citations (2)
Title |
---|
J.KIM, ET AL.: "Serum levels of soluble triggering receptor expressed on myeloid cells-1 (sTREM-1) and pentraxin 3 (PTX3) as markers of infection in febrile patients with systemic lupus erythematosus.", 《CLINICAL AND EXPERIMENTAL RHEUMATOLOGY》 * |
YAIR MOLAD, ET AL.: "Serum Soluble Triggering Receptor on Myeloid Cells-1 (sTREM-1) is Elevated in Systemic Lupus Erythematosus but does not Dishtinguish Between Lupus Alone and Concurrent Infection.", 《INFLAMMATION》 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Nistér et al. | A glioma-derived PDGF A chain homodimer has different functional activities from a PDGF AB heterodimer purified from human platelets | |
Okamoto et al. | A simple structure encodes G protein-activating function of the IGF-II/mannose 6-phosphate receptor | |
KR20120107741A (en) | Method for screening protein therapeutics for sepsis treatment | |
CN102326079B (en) | New receptor binding ligands, their use in the detection of cells with biological interest | |
CN110373415A (en) | Specifically bind the aptamer and application thereof of PD-L1 albumen | |
CN101074264B (en) | Recombinant anti-CTLA4 monoclonal antibody, its production and use | |
CN106350533A (en) | Anti-PD-L1-CAR-T, and preparation method and application thereof | |
Diani et al. | Blood to skin recirculation of CD4+ memory T cells associates with cutaneous and systemic manifestations of psoriatic disease | |
CN112433055A (en) | Method for detecting biological activity of PVRIG antibody based on reporter gene method | |
Kueng et al. | Fluorosomes: a convenient new reagent to detect and block multivalent and complex receptor-ligand interactions | |
Deugnier et al. | Characterization of rat T cell precursors sorted by chemotactic migration toward thymotaxin | |
CN102798723B (en) | Chemiluminescence detection kit and preparation method | |
CN110564730B (en) | CD40L aptamer and application thereof | |
CN106255886B (en) | The method for detecting the expression of survival motor neuron protein | |
CN106053831A (en) | Kit for detecting autoimmune disease | |
WO2015158810A1 (en) | Polypeptides and uses thereof for reducing cd95-mediated cell motility | |
CN105974125A (en) | Specific detection kit of cardiovascular diseases | |
CN101201358A (en) | Method for detecting bioactivity of humanized anti-CD52 antibody | |
KR101052621B1 (en) | Cell line which is stably expressing the HA-5-HT6R, for HTS of 5-HT6R's ligands | |
CN115850487A (en) | Anti-human CD137 antibody, nucleic acid molecule and application | |
EP2981616B1 (en) | Solid phase transfection of proteins and nucleic acids | |
Printsev et al. | The Opposite Functions of CD30 Ligand Isoforms | |
Witkowski et al. | Isolation and characterization of recombinant murine Wnt3a | |
Kurihara et al. | Expression of Na+/K+-ATPase α subunit isoforms in rat salivary glands: Occurrence of sense and antisense RNAs of the α3 isoform in the sublingual gland | |
CN105759060A (en) | Kit for detecting specificity of neurological chronic neurodegenerative disease |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WD01 | Invention patent application deemed withdrawn after publication | ||
WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20161026 |