CN102621310B - Colloidal gold chromatography anti-U1-RNP antibody detection test paper and preparation method thereof - Google Patents
Colloidal gold chromatography anti-U1-RNP antibody detection test paper and preparation method thereof Download PDFInfo
- Publication number
- CN102621310B CN102621310B CN201110032317.XA CN201110032317A CN102621310B CN 102621310 B CN102621310 B CN 102621310B CN 201110032317 A CN201110032317 A CN 201110032317A CN 102621310 B CN102621310 B CN 102621310B
- Authority
- CN
- China
- Prior art keywords
- antibody
- rnp
- preparation
- pad
- labeling antibody
- 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
Images
Landscapes
- Peptides Or Proteins (AREA)
Abstract
The invention discloses a colloidal gold chromatography anti-U1-RNP antibody detection test paper and a preparation method thereof. The colloidal gold chromatography anti-U1-RNP antibody detection test paper comprises a sample pad, a combination pad, a cellulose nitrate coated film and a water absorption pad, and the sample pad, the combination pad, the cellulose nitrate coated film and the water absorption pad are pasted on a base plate sequentially from one side of the base plate to the other side of the base plate, wherein the combination pad is coated with a gold-labeled antibody a and a gold-labeled antibody b; and the cellulose nitrate coated film is provided with a detection line and a quality control line, the detection line is coated with a U1-RNP antigen protein, and the quality control line is coated with a gold-labeled antibody c. By adopting indirect immunoassay to introduce the U1-RNP antigen protein in the invention to carry out process optimization on the combination pad and the sample pad, so high sensitivity, high specificity and high accuracy detection performances of the anti-U1-RNP antibody are realized, and a reference basis is provided for the auxiliary diagnosis of the mixed connective tissue disease.
Description
Technical field
The invention belongs to medical immunology application, be specifically related to test paper utilizing the anti-U1-RNP antibody of colloidal gold immunochromatographimethod technology for detection and preparation method thereof.
Background technology
SnRNPs refers to micro ribonucleic acid albumen (small nuclearribonucleoprotein particles, snRNPs) in nucleus.Within 1966, in a SLE patients serum who is named as " Sm ", find anti-snRNPs antibody, be named as " Sm antibody ".Within 1973, in SLE patients serum, find another kind of antiextractable nuclear antigen antibody, be named as anti-ribosomes nucleoprotein (anti-RNP antibody).Meanwhile, in mixed connective tissue disease (MCTD) patients serum, find Extractable nuclear antigen antibody (ENA antibody), ENA antigen has comprised Sm and RNP antigen, along with going deep into of research, finds that these two kinds of antigens are ribosomal constituents.(Fan Lieying chief editor autoantibody Preclinic and clinic [J] People's Education Publishing House before secondary people)
NRNP and Sm belong to one group by being rich in the low molecular weight RNA (U-RNA) of uridylate and the micro ribonucleic acid albumen (snRNP) that different proteins (9-70kDa) forms.According to the result of stratographic analysis by RNA component called after U1 to U6.Except RNA, U-nRNP also contains 6 kinds of different core proteins (B, B ', D, E, F, G), and U1-nRNP also contains particle specific proteins (70k, A, C) in addition.The target antigen of anti-U1-nRNP antibody is one or more particle specific proteinses.And the target antigen of anti-Sm antibody is one or more core proteins.U-nRNP molecule participates in the shearing of pre-mRNA (premessenger RNA): cut away the non-coding sequence (introne) of mRNA, insert the coded sequence (extron) of mRNA, form mRNA.(Fan Lieying chief editor autoantibody Preclinic and clinic [J] People's Education Publishing House before secondary people)
The anti-U1-rRNP antibody of high titre is the mark of Combination knot a kind of thick silk tissue sick (MCTD), positive rate 95-100%, and antibody titer is relevant to disease activity.In the Patients with SLE of 30-40%, also can detect anti-U1-rRNP antibody, but almost always with anti-Sm antibody.
In this, shearing resistance junctor compound protein U1-snRNP antibody has very important diagnostic significance.This compound comprises the RNA and the various albumen that are rich in uridine (U), as Sm albumen, and the special ribonucleoprotein A of U1 and C (RNP-A ,-C) and so-called 68KD albumen.Sm albumen also comes across in the spliceosome U-RNA of other type (as: U2, U4/U6 and U5).
Until at present, the mensuration of RNP autoantibody is just for Screening Diagnosis.Conventional method can be applied natural Sm antigen, but RNPs and Sm albumen cannot be separated separately.As a result, in the serum of Sm antibody positive, cannot measure and whether have RNP antibody.The present invention adopts the U1-RNP protein of prokaryotic expression cloned gene, surveys for anti-U1-RNP antibody.
At present the method for the conventional anti-U1-RNP antibody of detection in laboratory mainly contains enzyme-linked immunosorbent test (enzyme linked immunosorbent assay, ELISA), indirect immunofluorescence (indirect immunoflurescence, IFF), Western blot (immunoblotting test, IBT), linear immunoassay (Line immuno assay, LIA) etc.
Though Western blot combines the high resolution of SDS-PAGE and high specific and the susceptibility of ELISA method, operation relative complex, and reagent has stronger toxicity and contaminative.
Indirect immunofluorescence can be made semiquantitative determination, but need have fluorescence microscope result, the objectivity deficiency that result is judged, and standardization difficulty, technical program more complicated, is also not suitable for the detection of high flux sample.
Linear immunoassay is mainly used in the examination of the large class of disease, and specific aim is relatively poor, is also not suitable for the detection of high flux sample simultaneously.
ELISA method detects and can be used for high flux sample mensuration, and sensitivity is also higher, is extensively approved at present, but operate more loaded down with trivial detailsly, need repeatedly application of sample and washing, and be subject to the impact of temperature and incubation conditions, in specialized laboratory, operate, bring inconvenience to experiment.
The anti-U1-RNP antibody assay kit of commercialization is in the market mainly Western blot, running program is loaded down with trivial details, complete whole experimentation and need about three hours, also need professional immunological technique personnel in laboratory, to carry out experimental implementation, be subject to the impact of the environmental baseline factors such as various temperature and incubation time simultaneously, test is brought to inconvenience.
Colloidal gold chromatography is applied in the detection of anti-U1-RNP antibody.Colloidal gold immunity chromatography (gold-immunochromatography assay, GICA) be application colloidal gold-labeled method, using collaurum as tracer, taking fibre strip chromatographic material as solid phase, make sample solution swimming on chromatography strip by capillary effect, make the acceptor (as antigen or antibody) for determinand on determinand in sample and pad that immune response occur, and there is immune response and be trapped with the antigen (or antibody) on fibre strip chromatographic material, and then form macroscopic aubergine band, obtain experimental result intuitively, reach the object (Sikowicz Get al.One-step chromatographicimmunoassay for qualitative determination of choricogonadotropin inurine.Clin Chem.1990 (36) 1579-1586.) of fast detecting.When use only by sample pipetting volume on sample pad, within several minutes, just occur that according to aubergine band on detection line situation judges yin and yang attribute result.The advantages such as compared with other detection methods, detection time is short, only needs 5～10 minutes, and operating personnel are without training, easy and simple to handle, quick, preserves without low temperature, and accumulating is convenient.
Aspect autoimmune disease, on foreign market, occurred that at present some detect the test strips product of autoimmune disease, but the colloid gold immune test paper of anti-U1-RNP antibody does not still come out at home and abroad on market.
Summary of the invention
Technical matters to be solved by this invention is in order to overcome above methodological deficiency, colloidal gold chromatography is applied in the detection of anti-U1-RNP antibody, first U1-RNP antigen protein is applied in colloidal gold chromatography simultaneously, adopt indirect method to realize the anti-U1-RNP antibody test in blood, realize the detection performance of high special, high sensitivity, high accuracy, rapid screening goes out the positive sample of anti-U1-RNP antibody, can be fast, auxiliary diagnosis mixed connective tissue disease easily.
One of technical matters to be solved by this invention is to provide a kind of anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography.
Two of technical matters to be solved by this invention is to provide the preparation method of above-mentioned anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography.
As a kind of anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography of first aspect present invention, include sample pad, pad, cellulose nitrate coated film, adsorptive pads, described sample pad, pad, cellulose nitrate coated film, adsorptive pads are sticked on described base plate to the opposite side of described base plate successively by a side of base plate, and its special disease is:
Described pad is coated with golden labeling antibody a and golden labeling antibody b;
On described cellulose nitrate coated film, be provided with detection line and nature controlling line, described detection line is coated with U1-RNP antigen protein, and described nature controlling line is coated with golden labeling antibody c.
Further, the antibody A in described golden labeling antibody a is one or more in anti-human IgG monoclonal antibody, anti-human IgG polyclonal antibody, staphylococcal protein A (SPA), streptococcal protein G (Protein G).
Described anti-human IgG polyclonal antibody is the one in mouse source, Ma Yuan, Yang Yuan, rabbit source or cavy source.
Described anti-human IgG monoclonal antibody is the one in Yang Yuan or rabbit source.
Antibody A in described golden labeling antibody a is preferably staphylococcal protein A.
When antibody C while in antibody B and golden labeling antibody c in described golden labeling antibody b or difference, be the one in monoclonal antibody or polyclonal antibody, can there is specific binding formation immune complex in the antibody C in antibody B and the golden labeling antibody c in golden labeling antibody b wherein.
Described polyclonal antibody is the one in mouse source, Ma Yuan, Yang Yuan, rabbit source or cavy source, and monoclonal antibody is the one in Huo Tu source, mouse source.
Antibody B in described golden labeling antibody b is preferably rabbit igg, and correspondingly the antibody C in golden labeling antibody c is preferably goat anti-rabbit igg.
On described detection line, coated U1-RNP antigen protein is the U1-RNP antigen protein obtaining by prokaryotic expression cloned gene.
Described U1-RNP antigen protein is the recombinant protein obtaining by the cloned gene of escherichia coli prokaryotic expression.
The sample of described sample pad is from human serum, blood plasma, whole blood sample.
According to the present invention the monoclonal antibody of application can by by Kohler etc. (Continuouscultures of fused cells secreting antibody of predefined specificity[J] .Nature, 1975 (256): 495-497) the hybridoma method of first describing is prepared, or can be prepared by recombinant DNA method (seeing United States Patent (USP) 4816567)." monoclonal antibody " by Clackson etc. (Making antibody fragments using phage display libraries[J] .Nature, 1991:624-628) and the described technology of Marks etc. (By-passing immunization:Humanantibodies from V-gene libraries displayed on phage[J] .Journal ofMolecular Biology, 1991:581-597) from phage antibody library, separate.According to the present invention, the polyclonal antibody of application can be prepared by immune animal by Chen Xueqing etc. (immunology common experimental method .[M], 2000:15-26).
SPA of the present invention, Protein G be by prokaryotic expression cloning recombination, the escherichia coli prokaryotic expression cloned gene of being described by J. Pehanorm Brooker etc. (molecular cloning experiment guide .[M], 2002:1228-1232).
As the preparation method of a kind of anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography of second aspect present invention, this test paper is made up of jointly sample pad, pad, cellulose nitrate coated film, adsorptive pads and base plate, and its special disease is that the method includes following steps:
Step 1, the preparation of cellulose nitrate coated film
(1) preparation of U1-RNP antigen protein, obtains U1-RNP antigen protein by prokaryotic expression cloned gene;
(2) preparation of golden labeling antibody c: with 0.1M sal tartari adjusting collaurum pH 7.0～9.0, slowly add 4～25 μ g antibody C by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(3) preparation of cellulose nitrate coated film, the U1-RNP antigen protein of preparing by coated film damping fluid dilution step (1) to concentration is 0.5～1.5mg/mL, is coated on the detection line of cellulose nitrate coated film; Dilute antibody c is diluted to 0.8～2.0mg/mL with coated film damping fluid, be coated on the nature controlling line of nitrocellulose filter with 1～10 μ l/cm, after cellulose nitrate coated film prepares, be placed in 37 DEG C of dry for standby;
(1) preparation of golden labeling antibody a: with 0.1M sal tartari adjusting collaurum pH 7.0～9.0, slowly add 4～25 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(2) preparation of golden labeling antibody b: with 0.1M sal tartari adjusting collaurum pH 7.0～9.0, slowly add 4～25 μ g antibody B by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(3) preparation of pad: the polyester film of treated liquid dip treating, after oven dry, by after golden labeling antibody a and golden labeling antibody b mixing, be sprayed on pretreated polyester film with the consumption of 0.5～4 μ l/cm, 25 DEG C～37 DEG C after dry pad, pad is placed under the environment of 2 DEG C～8 DEG C for subsequent use;
Step 3, the preparation of sample pad
To after treated glass fibre membrane liquid dip treating, make sample pad, sample is padded on after 37 DEG C of oven dry for subsequent use;
Step 5, the material that step 4 made is completed, cuts into test strips.
In (2) of described step 1, the preparation of gold labeling antibody c: with 0.1M sal tartari adjusting collaurum pH 8.0～9.0, slowly add 5～15 μ g antibody C by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, will precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use; Wherein antibody C is goat anti-rabbit igg.
In (1) of described step 2, the preparation method of gold labeling antibody a, for regulating collaurum pH value to 8.0～9.0 with 0.1M sal tartari damping fluid, slowly adds 5～15 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use; Wherein antibody A is goat anti-human igg.
In (1) of described step 2, the preparation method of gold labeling antibody a is for regulating collaurum pH value to 7.0～8.0 with 0.1M sal tartari damping fluid, slowly add 8～12 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, will precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use.Then gold is marked to SPAOD 30 2～4 μ l/cm and be sprayed at pad, dry rear for subsequent use; Wherein antibody A is mouse-anti human IgG.
In (1) of described step 2, the preparation method of gold labeling antibody a is for regulating collaurum pH value to 5.0～6.5 with 0.1M sal tartari damping fluid, slowly add 10～15 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, will precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use.Then gold is marked to SPA OD 20 2～4 μ l/cm and be sprayed at pad, dry rear for subsequent use; Wherein antibody A is staphylococcal protein A.
In (2) of described step 2, the preparation method of gold labeling antibody b is for regulating collaurum pH value to 7.0～8.0 with 0.1M sal tartari damping fluid, slowly add 5～15 μ g antibody B by every milliliter of colloidal gold solution, rabbit igg, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, will precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use, wherein antibody B is rabbit igg.
In (3) of described step 2, by the golden labeling antibody a preparing and golden labeling antibody b 20～40: 15～20 ratios mixing by volume, be sprayed on pretreated polyester film with 2.0～4 μ l/cm with BIO-Dot Membrane jetter, 25 DEG C～37 DEG C dry pads that to obtain, pad envelope is placed under the environment of 2 DEG C～8 DEG C for subsequent use; Wherein the antibody A in golden labeling antibody a is staphylococcal protein A, and golden labeling antibody b is gold mark rabbit igg.
The object of described damping fluid is for providing certain pH and ionic strength to make gold chloride collaurum present required state of charge and ionic strength, its albumen being labeled is coated in around the ion of gold chloride collaurum taking Aucl-as core, and forms metastable a kind of state.Every kind of albumen is because its state of charge is different with amino acid composition, and therefore coated required condition is also different, need be by testing the kind, concentration, the pH that determine its damping fluid.In general, the required damping fluid of antibody labeling can be sal tartari, borate buffer, phosphate buffer, carbonic acid buffer etc., and its concentration is 0.1～0.5M, and pH is 5～10.
In described step 3, the width of the test paper cutting into is preferably two kinds of 4mm and 3mm.
Anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography of the present invention, it is anti-U1-RNP antibody in qualitative detection human serum, described in auxiliary diagnosis, detecting is anti-U1-RNP antibody in qualitative detection human serum, the early stage mixed connective tissue disease of auxiliary diagnosis (MCTD).
Detection principle of the present invention is specially the recombinant expressed U1-RNP antigen protein of selecting affinitive layer purification, gold labeling antibody a and gold mark rabbit igg are as colloid gold label compound, be sprayed at pad, utilize indirect method to detect and in blood serum sample, whether contain anti-U1-RNP antibody.When detection, sample is along with chromatography swimming is to pad and infiltrate colloid gold label compound, human IgG wherein and golden labeling antibody a are in conjunction with forming human IgG-Jin labeling antibody a compound, due to capillary effect, this person IgG-gold labeling antibody a compound along coated film swimming forward, if there is anti-U1-RNP antibody in blood serum sample, this person IgG-gold labeling antibody a compound be coated in the antigen protein generation specific immunity association reaction on nitrocellulose filter, form golden labeling antibody a-human IgG-U1-RNP antigen protein triplet compound and be trapped within on detection line, enrichment forms darker aubergine band gradually, because capillary effect continues swimming forward, gold mark rabbit igg be coated on goat anti-rabbit igg on nature controlling line and special immune response occurs be trapped, be enriched in gradually the darker aubergine band of formation on nature controlling line, unnecessary unconjugated material continues chromatography to adsorptive pads, therefore all occurs the positive findings that is judged to of band at detection line and nature controlling line, if do not contain anti-U1-RNP antibody in blood serum sample, when gold labeling antibody a arrives detection line, not with the antigen protein generation immune response being coated on detection line, therefore there is not aubergine band at detection line place, gold labeling antibody a continues swimming and arrives forward adsorptive pads, and gold mark rabbit igg continue swimming forward be coated in nature controlling line place goat anti-rabbit igg and special immune response occur and be trapped, be enriched in gradually on nature controlling line and form aubergine band, therefore only in Quality Control, occur that band is judged to negative findings.
The antigen protein that the present invention expresses genetic engineering bacterium is incorporated in test strips first, has realized the detection performance of high specific, high sensitivity, pin-point accuracy.Also occurred on the market at present commercialization ELISA kit, but gold mark chromatographic test paper by comparison, still has many differences, is not subject to place personnel's limit, detection time is short is 5-10 minute, and sentence read result is easy.In addition this test paper has high specific, high sensitivity, pin-point accuracy, can meet the rapid screening MCTD in market, for patient's diagnoses and treatment early provides condition, meanwhile, also can meet the demand of laboratories, instant detection, bedside detection.
Compared with existing detection method, advantage of the present invention:
1. the U1-RNP antigen protein first Application that uniqueness of the present invention is DNA recombinant expression is in colloid gold chromatographic test paper, greatly improve its detection sensitivity, can rapid screening go out all positive sample of anti-U1-RNP antibody (can detect the sample that is greater than 25RU/ml) by colloid gold test paper.
2. advantage of the present invention is that production cost is low.The required core reagent of Test paper of anti-U1-RNP antibody provided by the present invention is that antibody A is anti-human IgG or SPA or PROTEIN G, antibody C, antibody B, antigen protein, its wall scroll test paper agents useful for same amount is few, and can be by buying commercialization reagent or self-control, antigen protein derives from homemade purifying gene engineering antigen protein.
With published for compared with the additive method of anti-U1-RNP antibody test, test paper of the present invention has advantages of that many additive methods can not compare, as short in detection time (5～10min); Without any need for specific apparatus, can realize bedside detection and outpatient service and immediately detect; Easy and simple to handle, only need single step reaction, operating personnel are without training, and testing cost is low; Temperature, without particular/special requirement, without freezing, is stored to convenient transportation, and room temperature can be preserved 24 months.
Brief description of the drawings
Fig. 1 is side structure schematic diagram of the present invention.
Fig. 2 is testing result schematic diagram of the present invention.
Wherein:
Fig. 2 a is depicted as: after application of sample, reaction 3～5min can see on detection zone D and E relevant position, control zone and occurs aubergine band;
Fig. 2 b is depicted as: when aubergine band all appears in control zone E and detection zone D, result is positive, illustrates and in serum, contains anti-U1-RNP antibody;
Fig. 2 c is depicted as: as only there is an aubergine band at control zone E, aubergine band does not appear in detection zone D, and result is negative, illustrates in serum not containing anti-U1-RNP antibody;
Fig. 2 d, 2e are depicted as: as aubergine band does not appear in control zone E, no matter whether detection zone D has band to occur, all illustrates that test paper lost efficacy.
Embodiment
The anti-U1-RNP antibody test of colloidal gold immunity chromatography of the present invention test paper, as shown in Figure 1, this test paper is mutually to paste in turn cellulose nitrate coated film 3, pad 2, sample pad 1, adsorptive pads 6 by a side direction opposite side on base plate 7 with overlapping.
On pad 2, be coated with golden labeling antibody a and golden labeling antibody b, the antibody A of golden labeling antibody a is goat anti-rabbit igg gold labeling antibody or mouse-anti human IgG gold labeling antibody or the golden labeling antibody of staphylococcal protein A (SPA) or streptococcal protein G gold labeling antibody; Antibody B in gold labeling antibody b is rabbit igg.
On cellulose nitrate coated film 3, be provided with detection line 4 and nature controlling line 5, detection line 4 is coated with Cenp-B antigen protein, and nature controlling line 5 is coated with golden labeling antibody c, and the antibody in golden labeling antibody c is goat anti-rabbit igg.
Below in conjunction with specific embodiments and the drawings, further set forth the present invention.
Embodiment 1 U1-RNP antigen protein preparation
The U1-RNP antigen protein that is applied to this test paper is to build recombination by gene clone technology, and then adopting prokaryotic expression technology successful expression to go out is all the U1-RNP antigen protein in people source.Wherein, U1-RNP antigen protein derives from purifying gene engineering antigen protein.
Antibody A and antibody C, antibody B are prepared by following method.Wherein the anti-human IgG in antibody A, antibody C and antibody B generally can by animal in repeatedly subcutaneous (sc) or peritonaeum immunogene and the adjuvant of (ip) injection purifying produce.
By 0.05mg～1mg immune formulation (respectively for goat or mouse) and Freund ' the s Freund's complete adjuvant of 3 times of volumes are mixed to get to injection solution, by the multiple location injection in Animal Skin of this injection solution, after one month by animal with Freund ' the s Freund's complete adjuvant mixed liquor of 1/5 to 1/10 human IgG of originally measuring through multiple location Animal Skin hemostasis and booster immunization.After 7～14 days, by animal bloodletting, measure the anti-human IgG titre of serum.To animal booster immunization until titre reaches plateau.The method of producing polyclonal antibody has been described in many immunology textbooks, for example, Chen Xueqing etc. " immunology common experimental method ".By from being reclaimed splenocyte and make cellular immortalization by immune animal, for example, by merge or pass through Epstein-Barr virus Transformation with myeloma cell, and screening can be expressed the monoclonal antibody (Kohler of object antibody, Milstein.Derivation of specific antibody-producingtissue culture and tumor lines by cell fusion[J] .European Journalof Immunology, 1976:501-511).
Can carry out restructuring staphylococcal protein A and the streptococcal protein G in Dispersal risk A by escherichia coli prokaryotic expression cloned gene, concrete operation method referring to J. Pehanorm Brooker etc. (molecular cloning experiment guide .[M], 2002:1228-1232), or buy commercial restructuring staphylococcal protein A or streptococcal protein G.
Embodiment 3
Colloidal gold solution preparation
By 0.01% HAuCl
4solution is heated to boiling, adds rapidly every 100mL HAuCl
4solution adds appropriate reductant solution, and color is from blueness, then light blue, blue, then heating occurs redly, boils 7～10min and occurs transparent orange red.With ultrafiltration or miillpore filter, (0.45 μ m) filters, to remove polymkeric substance and other impurity that may sneak into wherein again.The collaurum outward appearance preparing should be pure, bright, without precipitation and floating thing, when grease and a large amount of black particle shape sediment appear in liquid level, abandon.
The reductive agent that wherein used can, for trisodium citrate (Frens 1973), tannic acid-trisodium citrate (Slot and Gueeze 1985), white phosphorus, preferably use trisodium citrate, more preferably uses 1% trisodium citrate.
Wherein glass container used should be definitely clean, with before need be through pickling, silication.Its water should be deionization ultrapure water, and resistivity reaches 18.2M Ω.
In colloidal gold solution preparation process, the compound method of each solution is as follows:
1.HAuCl
4preparation: with ultrapure water dissolved chlorine auric acid, be made into 1% solution, put 4 DEG C for subsequent use, the term of validity four months.1000mL 1%HAuCl
4solution formula: 10g HAuCl
4, ultrapure water is settled to 1000mL.
The preparation of 2.1% trisodium citrate: the preparation of 1% trisodium citrate (Sodium Citrate): with ultrapure water dissolving Sodium Citrate, be made into 1% solution, 0.22 μ m membrane filtration mistake, now with the current.
The preparation method of the anti-U1-RNP antibody test of colloidal gold immunity chromatography of the present invention test paper, specifically comprises the steps:
Step 1, the preparation of cellulose nitrate coated film
(1) adopt the method for embodiment 1 to prepare U1-RNP antigen protein;
(2) preparation of goat anti-rabbit igg gold labeling antibody:
The collaurum pH 7.0～9.0 that regulates embodiment 3 to prepare with 0.1M sal tartari, slowly add 4～25 μ g goat anti-rabbit iggs by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(3) preparation of cellulose nitrate coated film 3, diluting U1-RNP antigen protein to concentration with coated film damping fluid is 1.0～1.5mg/mL, adjust BIO-Dot instrument, be sprayed at the upper detection line of nitrocellulose filter (NC) 4 places, near pad 2 ends, apart from the about 9.5mm of pad 2, Cenp-B antigen protein is coated on the detection line 4 of cellulose nitrate coated film;
Goat anti-rabbit igg is diluted to 0.8～1.5mg/mL with coated damping fluid, is sprayed at upper nature controlling line 5 places near adsorptive pads 6 of nitrocellulose filter (NC) with 1～10 μ l/cm with BIO-Dot instrument, apart from the about 9mm of adsorptive pads 6.Detection line 4 and 5 liang of approximately 5～8mm of linear distance of nature controlling line, spray line is answered even thickness.37 DEG C of oven dry, encapsulate for subsequent use.
The coated damping fluid of its use can be borate, carbonate, phosphate, Tris-HCl or Tris-phosphate, acetate, barbital, etc., the object of its damping fluid is for providing certain pH and ionic strength to make albumen be coated with and firmly be coated in NC film, and its pH of cushioning fluid is generally about in 6～9.5 scopes, be preferably within the scope of 6.5～7.5 neutral buffered, and most preferably the pH value of damping fluid is in 7.0～7.4 scopes.Damping fluid is preferably phosphate.
Nitrocellulose filter (NC) wherein can be any commercialization nitrocellulose filter, S & SAE99, whatman 8 μ m, millipore M135, sartorius CN140 etc.The concrete NC film using is not key of the present invention, but in each mensuration, above-mentioned several NC films can be used as preferably.The film of the different damping fluid processing containing different surfaces activating agent that different manufacturers uses, there is gap in various degree with detection line antibody-solutions affinity used, also can largely cause lines inhomogeneous, traction or the phenomenon of disperse, therefore use assembling test paper to select preferred NC film.
(1) preparation of goat anti-human igg's gold labeling antibody: the collaurum pH 8.0～9.0 that regulates embodiment 3 to prepare with 0.1M sal tartari, slowly add 8～12 μ g goat anti-human iggs by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(2) preparation of rabbit igg gold labeling antibody: collaurum pH value to 7.0～8.0 that regulate embodiment 3 to prepare with 0.1M sal tartari, slowly add 8～12 μ g rabbit iggs by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use.
(3) preparation of pad: polyester film is soaked 30 minutes through damping fluid, 37 DEG C of oven dry, after goat anti-human igg gold labeling antibody and rabbit igg gold labeling antibody are mixed according to a certain percentage, use BIO-Dot instrument, be sprayed on pretreated polyester film with the consumption of 0.5～4 μ l/cm, 25 DEG C～37 DEG C dry, the complete pad 2 that obtains afterwards to be dried, pad 2 vacuum packagings, put 2 DEG C～8 DEG C for subsequent use.Be placed under the environment of 2 DEG C～8 DEG C for subsequent use;
In the preparation process of pad, operable damping fluid comprises following several:
(a) contain 1%PVA, 0.71%Na
3pO
4, 1%BSA, 0.05%NaN
3, 0.1%TritonX-100;
(b)1％PVA、1％BSA、0.05％PROCLIN
TM300、0.1％TritonX-100，pH7.0PBS；
(c)1％PVA、1％BSA、0.05％PROCLIN
TM300，pH7.0PBS；
(d) contain 1%PVA, 0.71%Na
3pO
4, 1%BSA, 0.05%NaN
3, 0.1%Tween-20;
(e) contain 1%PVA, 0.71%Na
3pO
4, 1%BSA, 0.05%NaN
3, 0.1%Tween-20, pH7.0PBS;
Its preferred damping fluid is damping fluid (d), because it has the ultimate resolution of difference yin and yang attribute sample.PROCLIN
tM300 and NaN
3play antisepsis, and Tween-20 have decontamination and hydrophilic interaction.
Blending ratio between goat anti-human igg's gold labeling antibody and rabbit igg gold labeling antibody can be carried out according to following method:
Substantially determine the OD20 of rabbit igg gold labeling antibody by preliminary experiment, be sprayed on pretreated polyester film with BIO-Dot discharge rate 1 μ l/cm, with 0.01MPBS be sample-loading buffer, can obtain the band of color intensity of expection, determine that the application OD discharge rate of rabbit igg gold labeling antibody is 1 μ l.
Subsequently goat anti-human igg's gold labeling antibody is carried out to gradient dilution to final concentration OD 100,80,60,40,20, then rabbit igg gold labeling antibody is diluted to final concentration OD 20, with BIO-Dot be that 3 μ l/cm are sprayed on the polyester film of handling well by above goat anti-human igg gold labeling antibody and rabbit igg gold labeling antibody potpourri discharge rate, the cellulose nitrate coated film 3 of preparation, pad 2, sample pad 1, adsorptive pads 6 are pasted on base plate 7 successively, with positive serum, critical reference value serum, negative serum be debugger object.Judgment basis: both band color intensities of the detection line 4 of positive serum and nature controlling line 5 are consistent is foundation, and critical reference value serum can occur, that OD value that negative serum occurs without band, is the application quantity of this batch.Show that by this test OD20～40 comparatively meet the requirements.
Step 3, the preparation of sample pad
Glass fibre membrane is pressed to 45mL/ sheet, evenly spill and be applied on glass fibre membrane with damping fluid, obtain sample pad after 37 DEG C of oven dry, sample pad encapsulates with aluminium foil bag, for subsequent use;
This step can with damping fluid comprise following several:
(a)0.05M Borax、0.01MPBS(pH7.0)、0.1％Sodium Casein、1％PEG20000、2％BSA、0.05％NaN
3；
(b)0.05M Borax、0.01MPBS(pH 7.0)、0.1％Sodium Casein、1％PEG20000、2％Casein、0.05％NaN
3；
(c)0.05M Tris-cl(pH 7.0)、0.01MPBS、0.1％Sodium Casein、1％PEG20000、2％Casein、0.05％NaN
3。
Preferred damping fluid is damping fluid (a), because it has the ultimate resolution of difference yin and yang attribute sample, NaN
3play antisepsis.
First carry out starting material pre-cut:
Cutting of sample pad: with guillotine, sample pad is cut into the i.e. long 28cm of base plate equal length making with PVC, wide 2.4cm, puts between drying shed for subsequent use.
Cutting of adsorptive pads: with trimmer, thieving paper is cut into the i.e. long 28cm of base plate equal length making with PVC, wide 3cm makes adsorptive pads, puts between drying shed for subsequent use.
Cutting of pad: be cut into the i.e. long 28cm of base plate equal length making with PVC in connection with pad with guillotine, wide 2.4cm, puts between drying shed for subsequent use.
Cutting of cellulose nitrate coated film: with trimmer, cellulose nitrate coated film is cut into the i.e. long 28cm of base plate equal length making with PVC, wide 1cm, puts drying shed for subsequent use.
Cellulose nitrate coated film 3, pad 2, sample pad 1, adsorptive pads 6, by stacking gradually shown in Fig. 1 on the base plate 7 of making at PVC plastics, are formed to large plate.Composing room's temperature should be controlled at 25 DEG C～37 DEG C, humidity 20%～30%.
Step 5
Slitting: large plate is cut into single part with cutting cutter, every person-portion width is cut into the width of 2.5mm～4mm according to certain requirement, random sampling observation, sensitivity can detect Internal Quality Control sample (i.e. weak positive sample), band colour developing degree reaches the d as Fig. 2, and specific band nothing but, product specifies to become specification product by Quality Control.
Assembling, packaging: the test paper that 1 person-portion has been cut is assembled in the test card of getting ready, make the sample pad of the corresponding test paper of application of sample window, the corresponding detection zone of result display window and control zone, and composing room's temperature should be controlled at 25 DEG C～37 DEG C, humidity 20%～30%.Be encapsulated in outer bag with drying agent, instructions, sample pipetting volume device again, keep in Dark Place in 4～25 DEG C.
In the preparation process of above-mentioned anti-Cenp-B antibody detecting test paper adopting colloidal gold immunochromatography, the collocation method of each solution is as follows:
1.0.1M the preparation of sal tartari: by ultrapure water preparation, 0.22 μ m membrane filtration mistake, put 4 DEG C for subsequent use, the term of validity one month.1000mL 0.1M K
2cO
3solution formula: 13.8g K
2cO
3; Ultrapure water is settled to 1000mL.
The preparation of 2.10%BSA: with ultrapure water preparation, 0.05% Sodium azide (NaN
3), 0.22 μ m membrane filtration mistake, put 4 DEG C for subsequent use, the term of validity two weeks.1000mL 10%BSA solution formula: 100g BSA, 0.5gNaN
3; Ultrapure water is settled to 1000mL.
3, the preparation of coated damping fluid: 9gNacl, 1.15gNa
2hPO
4, 0.23g NaH
2pO
4, 10gSucrose, 0.5gEDTA be dissolved in 1L ultrapure water, filter be placed in 4 DEG C for subsequent use.
4. cleansing solution also preserves the preparation of liquid:
2%BSA, 0.05% (NaN
3), 0.01M pH 7.2PBS, 0.22 μ m membrane filtration mistake, put 4 DEG C for subsequent use, the term of validity two weeks.Formula of liquid is preserved in the washing of 1000mL mark: 20g BSA, 0.5g NaN
3, 0.01M pH7.2PBS is settled to 1000mL.
5. the preparation of gold mark dilution:
The preparation of 1000mL dilution: 2.423g tris, 10gBSA, 0.2gNaN
3be dissolved in ultrapure water, adjust pH 8.0, constant volume is to 1000mL.
Gold mark is diluted to after working concentration with dilution, adds the trehalose of 20%Sucrose and 5%.
Embodiment 5
The preparation method of the anti-U1-RNP antibody test of the colloidal gold immunity chromatography test paper of this embodiment, its step is basic identical with embodiment 4, just the preparation process of goat anti-human igg's gold labeling antibody of (1) in the step 2 of this embodiment is replaced with to the preparation of the golden labeling antibody of staphylococcal protein A (SPA), specific as follows:
With pH 9.00.2M borate buffer adjusting collaurum pH value to 5.0～6.5, slowly add 10～15 μ gSPA albumen by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use.
Blending ratio between the golden labeling antibody of staphylococcal protein A (SPA) in this embodiment step 2 and rabbit igg gold labeling antibody can be carried out according to the method for embodiment 4.
Embodiment 6
The preparation method of the anti-U1-RNP antibody test of the colloidal gold immunity chromatography test paper of this embodiment, its step is basic identical with embodiment 4, just the preparation process of goat anti-human igg's gold labeling antibody of (1) in the step 2 of this embodiment is replaced with to the preparation of mouse-anti human IgG gold labeling antibody, specific as follows:
With 0.1M sal tartari adjusting collaurum pH value to 7.0～8.0, slowly add 8～12 μ g mouse-anti human IgGs by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use.
Blending ratio between mouse-anti human IgG gold labeling antibody in this embodiment step 2 and rabbit igg gold labeling antibody can be carried out according to the method for embodiment 4.
The preparation method of the anti-U1-RNP antibody test of the colloidal gold immunity chromatography test paper of this embodiment, its step is basic identical with embodiment 4, just the preparation process of goat anti-human igg's gold labeling antibody of (1) in the step 2 of this embodiment is replaced with to the preparation of streptococcal protein G gold labeling antibody, specific as follows:
With pH 9.0 0.2M borate buffers adjusting collaurum pH value to 5.0～6.5, slowly add 10～15 μ g streptococcal protein Gs by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use.
Blending ratio between streptococcal protein G gold labeling antibody in this embodiment step 2 and rabbit igg gold labeling antibody can be carried out according to the method for embodiment 4.
Recombinant expressed U1-RNP antigen protein is incorporated into anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography by the present invention, can realize the detection of the anti-U1-RNP antibody in blood sample, can be fast, auxiliary diagnosis mixed connective tissue disease easily
Embodiment 8
Sample process
Get whole blood 1～5ml, natural aggegation is after 5 minutes, and 3000～5000g/5min～10min, gets supernatant and obtain testing sample solution, has the above testing sample solution of 100 μ l at least.
Draw above serum 50～70 μ l samples in sample pad with micro sample adding appliance, slowly application of sample.Or serum sample is slowly dripped to 3～5 in sample pad with suction pipe, 5～10min observations, occurs that according to band situation carrys out interpretation yin and yang attribute result.
Embodiment 9
The detection of kit and clinical performance assessment
The antibody A of the golden labeling antibody a of the anti-U1-RNP antibody test of collaurum of the present invention test paper is preferably SPA, and the antibody B of antibody b is rabbit igg, and the antibody of antibody c is goat anti-rabbit igg, and the clinical performance that its test paper is carried out carries out following assessment.
1. stability test
1.1 37 DEG C of accelerated stabilities
Test paper is placed in to 37 DEG C and accelerates experiment, take out every day and test with Internal Quality Control product, the withinrun precision of the yin and yang attribute coincidence rate by yin and yang attribute reference material (each 10 parts) judges the stability of test paper.After 4 months, result shows, the testing result of quality-control product meets expection, and the yin and yang attribute coincidence rate of each yin and yang attribute reference material is 100%.Yin and yang attribute reference material is 10 parts of anti-U1-RNP Positive Seras and 10 parts of anti-U1-RNP negative antibody serum.
1.2 4 DEG C of stability experiments
Test paper is placed in to 4 DEG C and carries out conventional stability experiment, monthly take out with the test of Internal Quality Control product, the withinrun precision of the yin and yang attribute coincidence rate by yin and yang attribute reference material (each 10 parts) judges the stability of test paper equally.After 12 months, result shows, quality-control product testing result meets expection, and the yin and yang attribute coincidence rate of each yin and yang attribute reference material is 100%.After 18 months, result shows, the yin and yang attribute coincidence rate of each yin and yang attribute reference material is still 100%.After 24 months, testing result shows, occurs an official holiday feminine gender.Illustrate that based on the above results test paper, 2～8 DEG C of storages, is stable in 2 years.
2. diagnostic sensitivity
From clinical, collect 100 parts of serum that are diagnosed as sick (MCTD) patient of Combination knot a kind of thick silk tissue, 100 parts of clinical definites are system lupus erythematosus patient's serum, and the operation steps going up to specifications with homemade colloid gold test paper detects the serum of collecting above.After 5min, statistics is as follows:
| Sample type | Sample number | Negative | Positive |
| Clinical definite patient MCTD | 100 | 10 | 90 |
| Clinical definite patient SLE | 100 | 65 | 35 |
According to the result of adding up above, according to the detection of the MCTD patients serum to 100 parts of confirmations, the sample size that can find that there is anti-U1-RNP antibody positive is 90 examples, and negative sample quantity is 10 examples.Therefore by calculating:
MCTD diagnosis sensitivity (%)=90/ (90+10) × 100%=90%
SLE diagnosis sensitivity (%)=35/ (35+65) × 100%=35%
3. specificity
From clinical, collect 300 parts of healthy blood donor's serum serum, the operation steps going up to specifications with homemade colloid gold test paper detects the healthy blood donor who collects above and non-patient's MCTD serum.After 5min, statistics is as follows:
According to the statistics of the detection to the each 300 parts of serum of healthy blood donor, the sample size that discovery records anti-U1-RNP negative antibody in healthy blood donor is 295 examples, therefore by calculating: (healthy blood donor) specificity (%)=295/300 × 100%=98.33%
More than the description of this invention and non-limiting, based on other embodiment of inventive concept, all among protection scope of the present invention.
Claims (13)
1. anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography, include sample pad (1), pad (2), cellulose nitrate coated film (3), adsorptive pads (6), described sample pad (1), pad (2), cellulose nitrate coated film (3), adsorptive pads (6) are mutually overlapped and stick on described base plate (7) above to the opposite side of described base plate (7) successively by a side of base plate (7), it is characterized in that:
Described pad (2) is coated with golden labeling antibody a and golden labeling antibody b;
On described cellulose nitrate coated film (3), be provided with detection line (4) and nature controlling line (5), described detection line (4) is coated with U1-RNP antigen protein, and described nature controlling line (5) is coated with golden labeling antibody c;
The preparation method of described anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography, specifically comprises the steps:
Step 1, the preparation of cellulose nitrate coated film
(1) preparation of U1-RNP antigen protein, obtains U1-RNP antigen protein by prokaryotic expression cloned gene;
(2) preparation of golden labeling antibody c: with 0.1M sal tartari adjusting collaurum pH7.0～9.0, slowly add 4～25 μ g antibody C by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(3) preparation of cellulose nitrate coated film, the U1-RNP antigen protein of preparing by coated film damping fluid dilution step (1) to concentration is 0.5～1.5mg/mL, is coated on the detection line of cellulose nitrate coated film; Dilute golden labeling antibody c is diluted to 0.8～2.0mg/mL with coated film damping fluid, be coated on the nature controlling line of nitrocellulose filter with 1～10 μ l/cm, after cellulose nitrate coated film prepares, be placed in 37 DEG C of dry for standby;
Described coated film damping fluid is the one in borate buffer solution, carbonate buffer solution, phosphate buffer, Tris-HCl damping fluid, Tris-phosphate buffer, acetate buffer, barbitol buffer solution, and coated film pH of cushioning fluid is 6～9.5;
Step 2, the preparation of pad
(1) preparation of golden labeling antibody a: with 0.1M sal tartari adjusting collaurum pH7.0～9.0, slowly add 4～25 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(2) preparation of golden labeling antibody b: with 0.1M sal tartari adjusting collaurum pH7.0～9.0, slowly add 4～25 μ g antibody B by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(3) preparation of pad: through the polyester film of damping fluid dip treating, after oven dry, by after golden labeling antibody a and golden labeling antibody b mixing, be sprayed on pretreated polyester film with the consumption of 0.5～4 μ l/cm, 25 DEG C～37 DEG C after dry pad, pad is placed under the environment of 2 DEG C～8 DEG C for subsequent use;
Described damping fluid is one of following:
(a) contain 1%PVA, 0.71%Na
3pO
4, 1%BSA, 0.05%NaN
3, 0.1%TritonX-100;
（b）1%PVA、1%BSA、0.05%PROCLIN
TM300、0.1%TritonX-100，pH7.0PBS；
（c）1%PVA、1%BSA、0.05%PROCLIN
TM300，pH7.0PBS；
(d) contain 1%PVA, 0.71%Na
3pO
4, 1%BSA, 0.05%NaN
3, 0.1%Tween-20;
Step 3, the preparation of sample pad
Glass fibre membrane is made to sample pad after damping fluid dip treating, and sample is padded on after 37 DEG C of oven dry for subsequent use;
Described damping fluid is one of following:
（a）0.05M Borax、0.01MPBS、0.1%Sodium Casein、1%PEG20000、2%BSA、0.05%NaN
3；
（b）0.05M Borax、0.01MPBS、0.1%Sodium Casein、1%PEG20000、2%Casein、0.05%NaN
3；
（c）0.05M Tris-cl、0.01MPBS、0.1%Sodium Casein、1%PEG20000、2%Casein、0.05%NaN
3；
Step 4, on base plate, overlap joint is pasted the cellulose nitrate coated film, pad, sample pad and the adsorptive pads that complete through abovementioned steps 1-3 made mutually in turn;
Step 5, the material that step 4 made is completed, cuts into test strips;
Described golden labeling antibody a can the IgG in human serum sample be combined and be formed compound, if there is U1-RNP antibody in blood serum sample, golden labeling antibody a can be combined with U1-RNP antibody and be formed compound and this compound and can the U1-RNP antigen on being coated on detection line be combined and then complete the detection of U1-RNP antibody, if there is no U1-RNP antibody in blood serum sample, gold labeling antibody a-human IgG compound can not be combined by the U1-RNP antigen on detection line, be that golden labeling antibody a can the IgG in human serum sample be combined and be formed compound, the antigen capture in the situation that of only having analyte to exist in tested sample on the tested survey line of golden labeling antibody a-human IgG compound ability, gold labeling antibody b is not combined with analyte, but can be combined by the golden labeling antibody c on nature controlling line.
2. anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography according to claim 1, is characterized in that: the antibody A in described golden labeling antibody a is one or more in anti-human IgG monoclonal antibody, anti-human IgG polyclonal antibody, staphylococcal protein A (SPA), streptococcal protein G (Protein G).
3. anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography according to claim 2, is characterized in that: described anti-human IgG polyclonal antibody is the one in mouse source, Ma Yuan, Yang Yuan, rabbit source or cavy source; Described anti-human IgG monoclonal antibody is the one in Huo Tu source, mouse source.
4. anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography according to claim 1, is characterized in that: the antibody A in described golden labeling antibody a is staphylococcal protein A.
5. anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography according to claim 1, it is characterized in that: when the antibody C while in antibody B and golden labeling antibody c in described golden labeling antibody b or difference, be the one in monoclonal antibody or polyclonal antibody, wherein specific binding formation immune complex can occur the antibody C in antibody B and the golden labeling antibody c in golden labeling antibody b.
6. anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography according to claim 5, it is characterized in that: described polyclonal antibody is the one in mouse source, Ma Yuan, Yang Yuan, rabbit source or cavy source, described monoclonal antibody is the one in Huo Tu source, mouse source.
7. anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography according to claim 1, is characterized in that: on described detection line, coated U1-RNP antigen protein is the U1-RNP antigen protein obtaining by prokaryotic expression cloned gene.
8. a preparation method for anti-U 1-RNP antibody detecting test paper adopting colloidal gold chromatography, is characterized in that, specifically comprises the steps:
Step 1, the preparation of cellulose nitrate coated film
(1) preparation of U1-RNP antigen protein, obtains U1-RNP antigen protein by prokaryotic expression cloned gene;
(2) preparation of golden labeling antibody c: with 0.1M sal tartari adjusting collaurum pH7.0～9.0, slowly add 4～25 μ g antibody C by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(3) preparation of cellulose nitrate coated film, the U1-RNP antigen protein of preparing by coated film damping fluid dilution step (1) to concentration is 0.5～1.5mg/mL, is coated on the detection line of cellulose nitrate coated film; Dilute golden labeling antibody c is diluted to 0.8～2.0mg/mL with coated film damping fluid, be coated on the nature controlling line of nitrocellulose filter with 1～10 μ l/cm, after cellulose nitrate coated film prepares, be placed in 37 DEG C of dry for standby;
Described coated film damping fluid is the one in borate buffer solution, carbonate buffer solution, phosphate buffer, Tris-HCl damping fluid, Tris-phosphate buffer, acetate buffer, barbitol buffer solution, and coated film pH of cushioning fluid is 6～9.5;
Step 2, the preparation of pad
(1) preparation of golden labeling antibody a: with 0.1M sal tartari adjusting collaurum pH7.0～9.0, slowly add 4～25 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(2) preparation of golden labeling antibody b: with 0.1M sal tartari adjusting collaurum pH7.0～9.0, slowly add 4～25 μ g antibody B by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～5%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use;
(3) preparation of pad: through the polyester film of damping fluid dip treating, after oven dry, by after golden labeling antibody a and golden labeling antibody b mixing, be sprayed on pretreated polyester film with the consumption of 0.5～4 μ l/cm, 25 DEG C～37 DEG C after dry pad, pad is placed under the environment of 2 DEG C～8 DEG C for subsequent use;
Described damping fluid is one of following:
(a) contain 1%PVA, 0.71%Na
3pO
4, 1%BSA, 0.05%NaN
3, 0.1%TritonX-100;
（b）1%PVA、1%BSA、0.05%PROCLIN
TM300、0.1%TritonX-100，pH7.0PBS；
（c）1%PVA、1%BSA、0.05%PROCLIN
TM300，pH7.0PBS；
(d) contain 1%PVA, 0.71%Na
3pO
4, 1%BSA, 0.05%NaN
3, 0.1%Tween-20;
Step 3, the preparation of sample pad
Glass fibre membrane is made to sample pad after damping fluid dip treating, and sample is padded on after 37 DEG C of oven dry for subsequent use;
Described damping fluid is one of following:
（a）0.05M Borax、0.01MPBS、0.1%Sodium Casein、1%PEG20000、2%BSA、0.05%NaN
3；
（b）0.05M Borax、0.01MPBS、0.1%Sodium Casein、1%PEG20000、2%Casein、0.05%NaN
3；
（c）0.05M Tris-cl、0.01MPBS、0.1%Sodium Casein、1%PEG20000、2%Casein、0.05%NaN
3；
Step 4, on base plate, overlap joint is pasted the cellulose nitrate coated film, pad, sample pad and the adsorptive pads that complete through abovementioned steps 1-3 made mutually in turn;
Step 5, the material that step 4 made is completed, cuts into test strips;
Described golden labeling antibody a can the IgG in human serum sample be combined and be formed compound, if there is U1-RNP antibody in blood serum sample, golden labeling antibody a can be combined with U1-RNP antibody and be formed compound and this compound and can the U1-RNP antigen on being coated on detection line be combined and then complete the detection of U1-RNP antibody, if there is no U1-RNP antibody in blood serum sample, gold labeling antibody a-human IgG compound can not be combined by the U1-RNP antigen on detection line, be that golden labeling antibody a can the IgG in human serum sample be combined and be formed compound, the antigen capture in the situation that of only having analyte to exist in tested sample on the tested survey line of golden labeling antibody a-human IgG compound ability, gold labeling antibody b is not combined with analyte, but can be combined by the golden labeling antibody c on nature controlling line.
9. method as claimed in claim 8, is characterized in that, in (2) of described step 1, the preparation of gold labeling antibody c: with 0.1M sal tartari adjusting collaurum pH8.0～9.0, slowly add 5～15 μ g antibody C by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, will precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use; Wherein antibody C is goat anti-rabbit igg.
10. method as claimed in claim 8, it is characterized in that, in (1) of described step 2, the preparation method of gold labeling antibody a is for regulating collaurum pH value to 8.0～9.0 with 0.1M sal tartari damping fluid, slowly add 5～15 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, will precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use; Wherein antibody A is goat anti-human igg.
11. methods as claimed in claim 8, it is characterized in that, in (1) of described step 2, the preparation method of gold labeling antibody a is for regulating collaurum pH value to 7.0～8.0 with 0.1M sal tartari damping fluid, slowly add 8～12 μ g antibody A by every milliliter of colloidal gold solution, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, to precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use, wherein antibody A is mouse-anti human IgG.
12. methods as claimed in claim 8, it is characterized in that, in (2) of described step 2, the preparation method of gold labeling antibody b is for regulating collaurum pH value to 7.0～8.0 with 0.1M sal tartari damping fluid, slowly add 5～15 μ g antibody B by every milliliter of colloidal gold solution, rabbit igg, stir 10～30min, then add BSA to final concentration 0.5～1%, stir 10～30min, centrifugal, abandon supernatant, will precipitate with cleansing solution washing 2～3 times, last will precipitate resuspended with the preservation liquid of 1/10th initial volumes, put 4 DEG C for subsequent use, wherein antibody B is rabbit igg.
13. methods as claimed in claim 8, it is characterized in that, in (3) of described step 2, by the golden labeling antibody a preparing and golden labeling antibody b 20～40:15～20 ratio mixing by volume, be sprayed on pretreated polyester film with 2.0～4 μ l/cm with BIO-Dot Membrane jetter, 25 DEG C～37 DEG C dry pads that to obtain, pad envelope is placed under the environment of 2 DEG C～8 DEG C for subsequent use; Wherein the antibody A in golden labeling antibody a is staphylococcal protein A, and golden labeling antibody b is gold mark rabbit igg.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110032317.XA CN102621310B (en) | 2011-01-28 | 2011-01-28 | Colloidal gold chromatography anti-U1-RNP antibody detection test paper and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110032317.XA CN102621310B (en) | 2011-01-28 | 2011-01-28 | Colloidal gold chromatography anti-U1-RNP antibody detection test paper and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102621310A CN102621310A (en) | 2012-08-01 |
| CN102621310B true CN102621310B (en) | 2014-07-02 |
Family
ID=46561348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110032317.XA Active CN102621310B (en) | 2011-01-28 | 2011-01-28 | Colloidal gold chromatography anti-U1-RNP antibody detection test paper and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102621310B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111551731B (en) * | 2020-05-25 | 2024-02-20 | 山西瑞豪生物科技有限公司 | Intelligent colloidal gold biomedical detection method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329341A (en) * | 2008-07-09 | 2008-12-24 | 黑龙江美康汇融生物技术股份有限公司 | Reagent kit for detecting autoimmunity disease related antinuclear antibodies spectrum and preparation method thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311239C (en) * | 2004-09-07 | 2007-04-18 | 李人 | Immune chromatograph testing strip and production thereof |
| CL2007002926A1 (en) * | 2006-10-12 | 2008-05-16 | Genentech Inc | ALFA ANTILINPHOTOXINE ANTIBODY (LT-ALFA); COMPOSITION WITH THE ANTIBODY; PTA-7538 HYBRIDOMA; NUCLEIC ACID CODIFYING THE ANTIBODY; VECTOR AND CELL GUEST UNDERSTANDING NUCLEIC ACID; METHOD FOR INHIBITING THE ACTIVATED CELL PROLIFERATION P |
| CN101149385A (en) * | 2007-10-26 | 2008-03-26 | 天津中新科炬生物制药有限公司 | Hepatitis C virus antibody quick diagnosis test paper and its preparation method |
| GB0724735D0 (en) * | 2007-12-19 | 2008-01-30 | Psynova Neurotech Ltd | Methods and biomarkers for diagnosing and monitoring psychotic disorders |
| CN201293787Y (en) * | 2008-01-29 | 2009-08-19 | 马义才 | Portable rapid joint inspection device for hepatitis and hepatic cirrhosis |
| CN202083696U (en) * | 2011-01-28 | 2011-12-21 | 上海科新生物技术股份有限公司 | Anti-U1-RNP antibody detecting test paper adopting colloidal gold chromatography |
-
2011
- 2011-01-28 CN CN201110032317.XA patent/CN102621310B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329341A (en) * | 2008-07-09 | 2008-12-24 | 黑龙江美康汇融生物技术股份有限公司 | Reagent kit for detecting autoimmunity disease related antinuclear antibodies spectrum and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102621310A (en) | 2012-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102062777B (en) | Hepatopathy detecting test paper by colloidal gold chromatography and preparation method thereof | |
| CN101988924B (en) | Test strip for detecting anti-cyclic citrullinated peptide antibody in blood and preparation method | |
| CN102621308B (en) | Colloidal gold chromatography anti-Jo-1 antibody detection test paper and preparation method thereof | |
| CN104614511B (en) | Immune chromatography analysis method, immune chromatography analysis device, and immune chromatography analysis reagent box | |
| CN109085333A (en) | A kind of preparation, detection kit and the preparation method of rheumatoid factor antigen | |
| CN102621315B (en) | Colloidal gold chromatography anti-Ro52 antibody detection test paper and preparation method thereof | |
| CN104297465A (en) | Anti-OmpC antibody detection test paper preparation method and purpose thereof | |
| CN105628932A (en) | SAA (serum amyloid A) immunochromatographic test strip and preparation method and test method thereof | |
| CN102621311B (en) | Colloidal gold chromatography anti-SSB antibody detection test paper and preparation method thereof | |
| CN102621310B (en) | Colloidal gold chromatography anti-U1-RNP antibody detection test paper and preparation method thereof | |
| CN104297488A (en) | Anti-CBir1 antibody detection test paper preparation method and purpose thereof | |
| Pal | Immunoassay Technology. Vol. 2 | |
| CN102621313B (en) | Colloidal gold chromatography anti-Sp100 antibody detection test paper and preparation method thereof | |
| CN102621312B (en) | Colloidal gold chromatography hepatopathy detection test paper and preparation method thereof | |
| CN202083695U (en) | Anti-nucleosome antibody detecting test paper adopting colloidal gold chromatography | |
| CN202083693U (en) | Test paper for detecting anti-ribosomal P0 antibody by adopting colloidal gold chromatographic assay | |
| CN202141726U (en) | Anti-Jo-1 antibody test paper with colloidal gold immunochromatography | |
| CN202083696U (en) | Anti-U1-RNP antibody detecting test paper adopting colloidal gold chromatography | |
| CN102621316B (en) | Colloidal gold chromatography anti-nucleosome antibody detection test paper and preparation method thereof | |
| CN202083698U (en) | Colloidal gold chromatographic Ro52 antibody resistance detection test paper | |
| CN104764881A (en) | Preparation method and application of anti-MPO-ANCA antibody immunity chromatography test paper | |
| CN202083694U (en) | Anti-Cenp-B antibody detecting test paper adopting colloidal gold immunochromatography | |
| CN104198698A (en) | CUB and zona pellucida-like domains-containing protein 1 (CUZD1) antibody chromatography test strip and usage thereof | |
| CN101520459A (en) | Rabbit hemorrhagic disease virus colloidal gold test strip | |
| CN102621309B (en) | Colloidal gold chromatography anti-ribosomal P0 antibody detection test paper and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |