CN102435754A - Quantitative determination kit for free triiodothyronine (FT3) and detection method thereof - Google Patents
Quantitative determination kit for free triiodothyronine (FT3) and detection method thereof Download PDFInfo
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Abstract
The invention discloses a quantitative determination kit for free triiodothyronine (FT3), which is characterized in that: the kit contains an FT3 magnetic isolation reagent, an enzyme reactant, a reaction enhancer, a diluting solution, an FT3 correcting product, an FT3 quality control product, a concentrated cleaning solution and a substrate solution. The invention also discloses a preparation method for the kit. According to the kit disclosed by the invention, a chemiluminescence technology is combined with immune magnetic microparticles and an approximate homogeneous phase reaction system is provided; and compared with the prior art, the kit disclosed by the invention has higher detection sensitivity and specificity, realizes better performance parameters and greatly reduces product cost.
Description
Technical field
The present invention relates to measure the kit and the method for testing thereof of serum, especially relate to kit and the method for testing thereof of measuring free trilute (FT3) content in the serum.
Background technology
(3,5,3 '-triiodo thryonine is that a kind of molecular weight is 651 iodotyrosine T3) to triiodo thryonine, is a kind of important thyroid hormone.Free triiodothyronine (Free Tri-iodothyronine, be called for short FT3) is that a kind of the grade with thyroid binding globulin (TBG) transmitted protein bound trilute (T3), and FT3 has metabolic activity.FT3 gets into target cell and plays a role, and it is one of the most definite index of reflection thyroid function.FT3 content in peripheral blood is very low; It gets into cell and receptors bind performance physiological effect through cell membrane; Therefore it is the real active part of thyroid hormone generation physiological effect, can react thyroid functional status and other influence to function of human body more definitely.Measure FT3 content in the serum, be hyperthyroidism with low, and the hyperthyroid diagnosis of subclinical type and antidiastole one of the index of sensitivity.FT3 is the most directly index of diagnosis hyperthyroidism, and most of hyperthyroid patient FT3, FT4 can raise, but in some case, hyperthyroidism only is because the content rising of T3 causes (hyperthyroidism of T3 type).Serious hypothyroidism patient's the FT3 level low patient FT3 of on the low side and slight first merit usually maybe be normal.Generally, it is consistent that FT3 measures with TT3, but when unusual, the as indicated above situation of TBP, the result of the two will be inconsistent, and this moment, FT3 more can react thyroid function than T3.Therefore, it is generally acknowledged that FT3 is the sensitive index of diagnosis hyperthyroidism.In addition, measure serum FT 3 and can be used as the reliability index of judging curative effect again.The method that is used at present to measure FT3 clinically mainly contains the method for exempting from of putting, ELISA method, chemoluminescence method etc.
Magnetic particle separation enzyme-linked immunoassay technology be a kind of be the solid phase carrier of separating with the magnetic particle, immune magnetic particle isolation technics is combined with the enzyme linked immunosorbent detection technology and a kind of novel immunologic detection method set up.Traditional E LISA method; The association reaction of antigen, antibody carries out on solid phase (elisa plate reacting hole) surface; And magnetic particle separation enzyme-linked immunoassay, the association reaction of antigen, antibody also carries out under the condition of approximate liquid phase, thereby reaction is fast, thoroughly.Compare with traditional E LISA and to have highly sensitively, detect few advantage of time spent.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of free triiodothyronine (FT3) quantitative determination reagent kit and detection method thereof; Adopt this kit to carry out FT3 and detect time with higher sensitivity and specificity and shorter acquisition testing result and easier mode of operation.
The invention provides the quantitative determination reagent kit of a kind of free triiodothyronine (FT3), its reagent that comprises has FT3 magnetic separation agent, enzyme reaction thing, increased response agent, dilution, calibration object, quality-control product, cleaning fluid concentrate and substrate solution.
Described magnetic separation agent contains the magnetic microsphere that is marked with anti-FT3 monoclonal antibody.
Described enzyme reaction thing is the FT3 antigen that contains alkali phosphatase enzyme mark.
Described increased response agent is the damping fluid that contains Tris.
Said dilution is to contain BSA solution.
Described calibration object and quality-control product are the BSA protein solutions that contains a certain amount of FT3 antigen.
Said cleaning fluid concentrate is the damping fluid that contains TWEEN-20 and Proclin-300.
Described substrate solution is an enzyme-catalyzed chemical luminescence substrate solution.
The preparation method of the quantitative determination reagent kit of free triiodothyronine of the present invention (FT3) comprises the steps:
The first step: the preparation process of magnetic separation agent
One, magnetic bead buffer solution formulation operations step, preparation 1L:
1, takes by weighing TRIS 4.58g and NaCl6.81g in the 1L container, take by weighing 0.96g TWEEN-20 adds suitable quantity of water it is dissolved fully in the 20ml container after, pour in the said vesse;
2, with pipettor Proclin-300 is measured 0.2ml and in the beaker of 10ml purified water, fully after the dissolving, pour in the above-mentioned 1L container, in above-mentioned 1L container, add the 800ml purified water then, fully stir;
3, regulate its pH value of PH instrumentation amount, transfer PH, PH is between 7.95-8.05 in control;
4, taking by weighing BSA 3g pours in the above-mentioned 1L container;
5, be settled to 1000ml at last, filter with the 0.2um filter; Posting label after having filtered stores in 2-8 ℃ of freezer.
Two, the preparation process of magnetic separation agent
1, the 1.0mg disuccinimidyl suberate is dissolved among the 50ul DMSO, get in the 0.1mol/L PB damping fluid that the anti-FT3 monoclonal antibody of 2mg is dissolved in PH 9.5 to cumulative volume be 1ml;
2, confirm the input amount of disuccinimidyl suberate, draw disuccinimidyl suberate with liquid-transfering gun and join in the antibody-solutions of step 1, put room temperature 90min;
3, with step 2 antibody-solutions join put into then in the Centricon-10 concentration tube in the high speed freezing centrifuge under 3000g, concentrate 30min to volume be 0.5ml;
4, get the 0.5ml magnetic bead, add in the 5ml reaction cup, put into special-purpose test tube rack, draw supernatant after 2 minutes through magnet absorption;
5, add 1.5ml PH9.5 0.1mol/L PB, mixing 30 seconds is put on the shelf, removes supernatant, repetitive operation 3 times at every turn; The antibody-solutions that step 4 is obtained joins in the above-mentioned magnetic bead, and room temperature reaction is 4 hours behind the mixing;
6,37 ℃ of the TRIS solution 15 minutes that add 0.3ml 1mol/L;
7, add 1.5ml PH 7.2 0.1mol/L PB at every turn clean the magnetic bead of mark, mixing 30 seconds is put on the shelf, removes supernatant, repetitive operation 3 times;
8, preserve liquid with the 100ml magnetic bead and change magnetic bead over to the 125ml vial, be 0.05% FT3 magnetic separation agent; It is 0.1% BSA that magnetic bead is preserved formula of liquid, 0.05% Tween-20,0.02% NaN3,20% ethanol, 4 ℃ of preservations.
9, the magnetic separation agent that step 9 is obtained promptly gets magnetic separation agent in the kit of the present invention with the ratio mixing of magnetic bead buffer solution according to 1: 1.
Second step: the enzyme reaction thing prepares process
One, enzyme reaction thing diluent preparing operation steps, preparation 1L:
1, gets Tris 6.06g, NaCl 13.0g, Zncl
20.05g, Proclin-300 0.2ml and MgCl
20.05g in flask, in flask, add the 800ml purified water then, fully stir, reagent is dissolved fully;
2, transfer PH, PH is in the 7.35-7.45 scope in control;
3, taking by weighing BSA 3g pours in the above-mentioned beaker;
4, be settled to 1000ml at last, promptly get with the filtration of 0.2um filter.
Two, the coupling of alkaline phosphatase ALP and FT3 antigen
1, getting FT3 antigen 1 mg is positioned in the 1ml glass tube;
2, get 200ul DMSO dissolving antigen and make the final concentration of antigen arrive 5mg/ml, fully mixing;
3, the molar ratio that adds the disuccinimidyl suberate of 5mol according to 1mol antigen adds disuccinimidyl suberate in the solution of step 2, and reaction is 1.5 hours in 37 ℃ of constant temperature ovens;
4, the mol ratio that adds the ALP of 1mol according to 5mol antigen is added ALP toward step 3 solution in, the PH that adds 1ml then is that 7.4 concentration are the PB damping fluid of 0.1M, places 37 degree constant temperature ovens to react 3 hours;
5, with the solution of step 4 with PD-10 post purifying, collect refined solution, according to 1: 5000 volume add above-mentioned steps-) the enzyme reaction thing dilution that obtains, mix, promptly get the enzyme reaction thing.
The 3rd step:
Increased response agent preparation steps, preparation 1L:
1, takes by weighing TRISl.56g and NaCl 4.23g in the 1L container; With pipettor with Proclin-300 measure 0.2ml in the beaker of 10ml purified water fully the dissolving after, pour in the above-mentioned 1L container;
2, measure the 800ml purified water in above-mentioned 1L container with graduated cylinder, fully stir, transfer PH until dissolving fully, PH is between 7.35-7.45 in control;
3, take by weighing Mak33 0.9g in above-mentioned 1L container; Last constant volume 1000ml after the dissolving, filters with the 0.2um filter fully.
The 4th step:
The diluent preparing step, preparation 1L:
1, takes by weighing NaCl9.0g and BSA 60g in the container of 1L;
2, with pipettor Proclin-300 is measured 0.5ml and add the dissolving of 10ml purified water, pour in the container of above-mentioned 1L;
3, last constant volume 1000ml after the dissolving, filters with the 0.2um filter fully, posts label and stores in 2-8 ℃ of freezer, and the term of validity is 12 months.
The 5th step:
The preparation of calibration object and quality-control product:
Calibration object concentration is respectively 1,3,6,12,25pg/ml; Quality-control product concentration is respectively 3,12pg/ml.
The 6th step:
The cleaning concentrate preparation steps, preparation 1L:
1, takes by weighing TRIS 12.54g and NaCl 325.6g in the 1L container;
2, take by weighing 5g Tween-20 adds 20ml water it is dissolved fully in the 100ml container after, pour in the above-mentioned 1L container;
3, with pipettor with Proclin-300 measure 0.2ml in the beaker that fills the 10ml purified water fully the dissolving after, pour in the above-mentioned 1L container;
4, measure the 800ml purified water in above-mentioned 1L container with graduated cylinder, fully stir, until dissolving fully;
5, transfer PH, control its scope between 7.35-7.45;
6, last constant volume 1000ml, the dissolving back is filtered with the 0.2um filter and is promptly got fully.
The 7th step:
The substrate solution preparation steps, preparation 1L:
1, takes by weighing TRIS 2.35g, NaCl 6.41g, Na
2SO
30.002g and Proclin-300 0.2ml is in the 1L beaker;
2, measure the 600ml purified water in the 1L beaker with graduated cylinder, fully stir,, transfer PH, control its scope between 7.95-8.05 until dissolving fully;
3, behind the adding 250ml Lumi-Phos 480, filter collection filtrating, be settled to 1000ml, promptly get behind the mixing with purified water with the 0.2um filter.
Principle of work of the present invention: a kind of detection method that the present invention combines with the magnetic particle isolation technics for the competing method chemiluminescence immune analysis method.In sample, calibration object and quality-control product, add FT3 monoclonal antibody and the stabilizing reinforcer that quantitative enzyme is marked FT3 antigen, combined magnetic particle.37 ℃ hatch after, in enzyme mark FT3 antigen and sample, calibration object and the quality-control product FT3 competition with the FT3 monoclonal antibody generation specificity combination that is combining magnetic particle.In externally-applied magnetic field, directly precipitate, do not need centrifugal promptly separable.Remove supernatant, the compound of washing and precipitating adds enzyme-catalyzed chemical luminescence substrate then.Substrate by catalytic pyrolysis, forms unsettled excited state intermedium under the enzyme effect, when the excited state intermedium is got back to ground state, just send photon, forms luminescence-producing reaction, can use the luminous intensity of light-emitting appearance detection reaction.In sensing range, the luminous intensity of reaction and the FT3 concentration in the sample are inversely proportional to.
Main innovation part of the present invention is:
1, kit of the present invention combines chemiluminescence with immune magnetic particle, and a kind of reaction system near homogeneous phase is provided, and compared with prior art, kit of the present invention has higher detection sensitivity and specificity, and has reached preferable performance parameter.
2, the invention discloses a kind of new special-purpose stabilizing reinforcer and cleaning fluid concentrate, make course of reaction more reliable and more stable, experimental data is effectively sensitive, when enhancing product performance, and greatly reduces cost of products;
3, the magnetic separation agent in the kit; The enzyme reaction thing, stabilizing reinforcer, calibration object, quality-control product; Cleaning fluid concentrate, dilution and substrate solution all are the optimization formulas under this reaction system, and giving the use effect phase of this kit and detecting performance provides powerful guarantee.
Embodiment
Embodiment 1,
One, magnetic bead buffer solution formulation operations rules: prescription is seen table 1, and 1L is an example with preparation:
1, takes by weighing TRIS 4.58g and NaCl6.81g in the 1L container, take by weighing 0.96g TWEEN-20 adds suitable quantity of water it is dissolved fully in the 20ml container after, pour in the said vesse;
2, with pipettor with Proclin-300 measure 0.2ml in the beaker of a small amount of purified water fully the dissolving after, pour in the above-mentioned 1L container; In the 1L container, add the 800ml purified water then, fully stir, reagent is dissolved fully;
3, regulate pH value, measure its pH value; Transfer PH with HCl or NaOH, measure its PH and between 7.95-8.05, promptly meet the requirements;
4, taking by weighing BSA (bovine serum albumin(BSA)) 3g pours in the said vesse;
5, be settled to 1000ml at last, survey pH value, scope promptly meets the requirements between 7.95-8.05, filters with the 0.2um filter; Post label after having filtered and store in 2-8 ℃ of freezer, the magnetic bead buffer solution term of validity is 12 months;
Magnetic bead buffer solution table 1
Two, the preparation process of magnetic separation agent
1,1.0mg DSS (disuccinimidyl suberate) is dissolved among the 50ul DMSO, promptly concentration is 20mg/ml; Get in the 0.1mol/L PB damping fluid that the anti-FT3 monoclonal antibody of 2mg (day strong bio-pharmaceuticals (Tianjin) company limited, concentration is 3.25mg/ml) is dissolved in PH 9.5 to cumulative volume be 1ml;
2, calculate the input amount of DSS, calculate according to following formula: (antibody quality/16000) * 10 * 368/C
DSS), C wherein
DSSRefer to the amount of substance concentration mol/L of DSS;
3, the DSS with liquid-transfering gun absorption respective volume joins in the antibody-solutions of step 1, puts room temperature 90min;
4, with step 3 antibody-solutions join put into then in the Centricon-10 concentration tube in the sigma2-16k high speed freezing centrifuge under the centrifugal force of 3000g, concentrate about 30min to volume be 0.5ml;
5, get the 0.5ml magnetic bead, magnetic bead concentration is 0.5g/ml, and described magnetic bead diameter adds in the 5ml reaction cup between 0.9 μ m, puts into special-purpose test tube rack, draws supernatant through magnet absorption after 2 minutes;
6, add 1.5ml PH9.5 0.1mol/L PB, mixing 30 seconds is put on the shelf, removes supernatant, repetitive operation 3 times at every turn; The antibody-solutions that step 4 is obtained joins in the magnetic bead, and room temperature reaction is 4 hours behind the mixing, keeps the mixing state;
7, the TRIS solution 37 that adds 0.3ml 1mol/L is spent 15 minutes, and wherein the application of sample amount of TRIS adds 0.15mlTRIS for 1mg antibody;
8, add 1.5ml PH 7.2 0.1mol/L PB at every turn clean the magnetic bead of mark, mixing 30 seconds is put on the shelf, removes supernatant, repetitive operation 3 times;
9, preserve liquid with the 100ml magnetic bead and change magnetic bead over to the 125ml vial, be 0.05% FT3 magnetic separation agent; It is 0.1% BSA that magnetic bead is preserved formula of liquid, 0.05% Tween-20,0.02% NaN3,20% ethanol, 4 ℃ of preservations.
10, the magnetic separation agent that step 9 is obtained is with the ratio mixing of magnetic bead buffer solution according to 1: 1;
11, post label and store in 2-8 ℃ of freezer, the magnetic separation agent term of validity is 12 months;
Embodiment 2
One, enzyme reaction thing diluent preparing working specification: prescription is seen table 2, and 1L is an example with preparation:
1, gets Tris 6.06g, NaCl 13.0g, Zncl
20.05g, Proclin-300 0.2ml and MgCl
20.05g in flask; In flask, add the 800ml purified water then, fully stir, reagent is dissolved fully;
2, transfer PH with HCl or NaOH, measurement makes PH in the 7.35-7.45 scope;
3, taking by weighing BSA 3g pours in the said vesse;
4, be settled to 1000ml at last, survey pH value, scope promptly meets the requirements between 7.35-7.45, filters with the 0.2um filter; After having filtered, post label and store in 2-8 ℃ of freezer, the term of validity is 12 months;
Enzyme reaction thing dilution table 2
Two, the coupling of alkaline phosphatase ALP and FT3 antigen
1, getting FT3 antigen 1 mg is positioned in the 1ml glass tube;
2, get 200ul DMSO dissolving antigen and make the final concentration of antigen arrive 5mmg/ml, fully mixing;
3, the molar ratio that adds the disuccinimidyl suberate of 5mol according to 1mol antigen adds disuccinimidyl suberate in the solution of step 2, and reaction is 1.5 hours in 37 ℃ of constant temperature ovens;
4, the mol ratio that adds the ALP of 1mol according to 5mol antigen is added ALP toward step 3 solution in, the PH that adds 1ml then is that 7.4 concentration are the PB damping fluid of 0.1M, places 37 degree constant temperature ovens to react 3 hours;
5, with the solution of step 4 with PD-10 post purifying, collect refined solution, add enzyme reaction thing dilution according to 1: 5000 volume, mix, promptly get the enzyme reaction thing.
Embodiment 3
Increased response agent formulation operations rules: prescription is seen (table 3), and 1L is an example with preparation:
1, take by weighing TRIS (trishydroxymethylaminomethane, molecular formula: (HOCH2) 3CNH2) 1.56g and NaCl 4.23g are in the 1L container; With pipettor with Proclin-300 measure 0.2ml in the beaker of a small amount of purified water fully the dissolving after, pour in the above-mentioned 1L container;
2, measure the 800ml purified water in the 1L container with graduated cylinder, fully stir, until dissolving fully; Transfer PH with HCL or NaOH, measure its scope between 7.35-7.45;
3, take by weighing Mak330.9g in above-mentioned 1L container;
4, last constant volume 1000ml after the dissolving, surveys pH value fully, and scope promptly meets the requirements between 7.35-7.45, filters with the 0.2um filter; After having filtered, post label and store in 2-8 ℃ of freezer, the term of validity is 12 months;
The preparation (table 3) of increased response agent
Embodiment 4
The dilution prescription is seen (table 4), and 1L is an example with preparation:
1, takes by weighing NaCl9.0g and BSA 60g in the container of 1L;
2, with pipettor Proclin-300 is measured 0.5ml and add the dissolving of 10ml purified water, pour in the container of above-mentioned 1L;
3, last constant volume 1000ml after the dissolving, filters with the 0.2um filter fully, posts label and stores in 2-8 ℃ of freezer, and the term of validity is 12 months.
The preparation (table 4) of dilution
Embodiment 5
The preparation of calibration object and quality-control product:
1, peak: maximum concentration point is X, and impact point concentration is A, B, and C, D, E, F, when preparing the solution of V volume, the volume that needs the adding raw material is for being respectively: table 5
| Concentration | Add calibration object dilution volume | Add the X volume |
| A | V-A*V/X | A*V/X |
| B | V-B*V/X | B*V/X |
| C | V-C*V/X | C*V/X |
| D | V-D*V/X | D*V/X |
| E | V-E*V/X | E*V/X |
| 0F | V-F*V/X | F*V/X |
2, to be mixed with concentration point with dilution (concrete prescription see embodiment 4) be 1,3,6,12 to free triiodothyronine (FT3) quantitative determination reagent kit FT3 calibration object raw material (purchase in AMG Co., concentration is 40mg/ml), 25pg/ml; It is 3 that quality-control product uses the concentration point of diluent preparing, 12pg/ml.
3, fully the dissolving after, post label and store in 2-8 ℃ of freezer, the term of validity is 12 months.
Embodiment 6:
Cleaning concentrate formulation operations rules: prescription is seen (table 6), and 1L is an example with preparation:
1, takes by weighing TRIS 12.54g and NaCl 325.6g in the 1L container;
2, take by weighing 5g Tween-20 adds suitable quantity of water it is dissolved fully in the 100ml container after, pour in the said vesse;
3, with pipettor with Proclin-300 measure 0.2ml in the beaker that fills the 10ml purified water fully the dissolving after, pour in the above-mentioned 1L container;
4, measure the 800ml purified water in above-mentioned 1L container with graduated cylinder, fully stir, until dissolving fully;
5, transfer PH with HCL or NaOH, measure its scope between 7.35-7.45;
6, last constant volume 1000ml surveys pH value, and scope promptly meets the requirements between 7.35-7.45, and filter with the 0.2um filter dissolving back fully; After having filtered, post label and store in 2-8 ℃ of freezer, the term of validity is 12 months;
The preparation (table 6) of cleaning concentrate
Embodiment 7
Substrate solution formulation operations rules: prescription is seen (table 7), and 1L is an example with preparation:
1, takes by weighing TRIS 2.35g, NaCl 6.41g, Na
2SO
30.002g and Proclin-300 0.2ml is in the 1L beaker;
2, measure the 600ml purified water in the 1L beaker with graduated cylinder, fully stir, until dissolving fully; Transfer PH with HCl or NaOH, measure its scope between 7.95-8.05;
3, behind the adding 250ml Lumi-Phos 480, filter collection filtrating with the 0.2um filter, be settled to 1000ml with purified water, behind the mixing, post label and store in 2-8 ℃ of freezer, the term of validity is 12 months.
The preparation (table 7) of chemical luminous substrate
Method of testing of the present invention is following
1, adds 15 μ l FT3 calibration objects, quality-control product, sample to be measured to corresponding test tube bottom.
2, add 30 μ l enzyme reaction things to each test tube.
3, add 30 μ l increased response agent to each test tube.
4, add 30 μ l magnetic separation agents to each test tube.
5, cover test tube with plastic sheeting, the multitube vortex mixer behind the tube shaken frame 30s, is put 37 ℃ of water-baths 30 minutes gently.
6, the test tube frame linking is put to magnetic separator, guarantees that every test tube all contacts with separator surface, precipitates 2 minutes.The separation vessel that reverses is slowly poured out supernatant, is placed on the test tube of reversing on the filter paper together with separation vessel, firmly bounces the separation vessel bottom to remove all drops that are bonded on the tube wall.
7, the cleaning fluid concentrate with 20 times of purified water dilutions after, add cleaning fluid after the 200 μ l dilution to each test tube, put the mixing 30s that vibrates gently on the multitube vortex mixer.Should avoid the application of sample dynamics excessive and cause magnetic bead to spill during application of sample.Mixing is wanted thoroughly.
8, repeating step is 6,7,6 one times.
9, added in 200 μ l substrate solution to the test tubes mixing 3 seconds, detect with ready luminous detection appearance rapidly.
10, as running into high value HOOK sample, for fear of high value HOOK effect occurring, the suggestion clinician selects suitable extension rate that sample is diluted according to all the other test indexs.
Clinical testing:
1, detects data
Sample picks up from the normal health check-up of 1000 examples, blood donor.The sample physical examination result does not all have liver, brain, kidney, disease of digestive tract, does not have blood transfusion and major operation history in half a year, and the women is not in the gestational period and lactation.Measured value is carried out statistical analysis, draw normal serum term of reference: 1.03-4.61pg/ml.The testing result of the kit of producing with external renowned company is compared, and kit of the present invention is more accurate, is accurate to 2 significant digits.
Notebook data is only for reference, and different regions, Different Individual and employing distinct methods detect, and measured FT3 level also can be different, advises the range of normal value of each laboratory foundation oneself.The FT3 value that can not only draw with this method is made diagnosis, only as the intermediate data reference role, should combine clinical other analyses result, comprises patient's concrete condition and treatment situation.FT3 concentration value and this kit measurement result in the sample that obtains through additive method do not have direct comparability.The sample that exceeds the kit measurement scope, system can't provide definite numerical value.Measure its definite result like desire, measure again after the suggestion dilution.The testing result of this kit only supplies clinical reference, can not be separately as the foundation of making a definite diagnosis or get rid of case, and for reaching diagnostic purpose, this testing result will be used in combination with clinical examination, medical history and other inspection.These article can be used for the mensuration of serum sample, and the reliability that is used for other body fluid samples FT3 concentration determination is fully confirmed.
2, kit performance index of the present invention
Sensitivity for analysis is defined as: to the mensuration of 20 times zero calibration objects, get its mean deviation of 2 times, its pairing concentration on typical curve is sensitivity for analysis; Sensitivity for analysis: 0.60pg/mL; Accuracy: CV%≤15.0%; The range of linearity: 0.60-25pg/ml; Linear coefficient: r>=0.9900; Specificity: with the cross reaction situation of main analog:
Claims (5)
1. the quantitative determination reagent kit of a free triiodothyronine FT3 is characterized in that, this kit comprises FT3 magnetic separation agent, enzyme reaction thing, increased response agent, dilution, FT3 calibration object, FT3 quality-control product, cleaning fluid concentrate and substrate solution.
2. kit as claimed in claim 1 is characterized in that, described FT3 magnetic separation agent contains the magnetic microsphere that is marked with anti-FT3 monoclonal antibody;
Described enzyme reaction thing is the FT3 antigen that contains alkali phosphatase enzyme mark;
Described increased response agent is the damping fluid that contains Tris;
Said dilution is the solution that contains BSA;
Described calibration object and quality-control product are the BSA solution that contains a certain amount of FT3 antigen;
Said cleaning fluid concentrate is the damping fluid that contains TWEEN-20 and Proclin-300;
Described substrate solution is an enzyme-catalyzed chemical luminescence substrate solution.
3. let alone a described kit like claim 1-2, it is characterized in that, each component makes according to the method for being prepared as follows in the said kit:
One, the preparation process of magnetic separation agent
One), magnetic bead buffer solution formulation operations step, the preparation 1L:
1, takes by weighing TRIS 4.58g and NaCl6.81g in the 1L container, take by weighing 0.96g TWEEN-20 adds suitable quantity of water it is dissolved fully in the 20ml container after, pour in the above-mentioned 1L container;
2, with pipettor Proclin-300 is measured 0.2ml and in the beaker of 10ml purified water, fully after the dissolving, pour in the above-mentioned 1L container, in above-mentioned 1L container, add the 800ml purified water then, fully stir;
3, regulate PH, PH is between 7.95-8.05 in control;
4, taking by weighing BSA 3g pours in the above-mentioned 1L container;
5, be settled to 1000ml at last, promptly get with the filtration of 0.2um filter;
Two), the preparation process of magnetic separation agent
1, the 1.0mg disuccinimidyl suberate is dissolved among the 50ul DMSO, get in the 0.1mol/L PB damping fluid that the anti-FT3 monoclonal antibody of 2mg is dissolved in PH 9.5 to cumulative volume be 1ml;
2, draw in the antibody-solutions that above-mentioned disuccinimidyl suberate joins step 1 with liquid-transfering gun, put room temperature 90min;
3, step 2 antibody-solutions is joined in the concentration tube, put into then in the high speed freezing centrifuge that centrifugal 30min is concentrated into 0.5ml under 3000g;
4, get the 0.5ml magnetic bead, add in the 5ml reaction cup, draw supernatant through magnet absorption after 2 minutes, add 1.5ml PH9.50.1mol/L PB then, mixing 30 seconds adds the antibody-solutions that step 3 obtains then, and room temperature reaction is 4 hours behind the mixing;
5, add 37 ℃ of the TRIS solution 15 minutes of 0.3ml 1mol/L, add 1.5ml PH 7.2 0.1mol/L PB then and clean the magnetic bead of mark, mixing 30 seconds;
6, preserve liquid with the 100ml magnetic bead and change magnetic bead over to vial;
7, solution that step 6 is obtained and above-mentioned magnetic bead buffer solution promptly get the magnetic separation agent in claim 1 or the 2 said kits according to 1: 1 volume ratio mixing;
Two, the preparation process of enzyme reaction thing
One), enzyme reaction thing diluent preparing operation steps, the preparation 1L:
1, gets Tris 6.06g, NaCl 13.0g, Zncl
20.05g, Proclin-300 0.2ml and MgCl
20.05g in flask, in flask, add the 800ml purified water then, fully stir, reagent is dissolved fully;
2, transfer PH, PH is in the 7.35-7.45 scope in control;
3, taking by weighing BSA 3g pours in the above-mentioned beaker;
4, be settled to 1000ml at last, promptly get with the filtration of 0.2um filter;
Two), the coupling of alkaline phosphatase ALP and FT3 antigen
1, gets FT3 antigen;
2, get 200ul DMSO dissolving antigen and make the final concentration of antigen arrive 5mg/ml, fully mixing;
3, the molar ratio that adds the disuccinimidyl suberate of 5mol according to 1mol antigen adds disuccinimidyl suberate in the solution of step 2, and reaction is 1.5 hours in 37 ℃ of constant temperature ovens;
4, the mol ratio that adds the ALP of 1mol according to 5mol antigen is added ALP toward step 3 solution in, adding 1mlPH then is that 7.4 concentration are the PB damping fluid of 0.1M, places 37 degree constant temperature ovens to react 3 hours;
5, with the solution of step 4 with PD-10 post purifying, collect refined solution, add above-mentioned steps one according to 1: 5000 volume ratio) the enzyme reaction thing dilution that obtains, mix, promptly get the enzyme reaction thing.
Three, the preparation process of increased response agent, preparation 1L:
1, get TRIS1.56g and NaCl 4.23g in the 1L container, get 0.2ml Proclin-300 in the beaker of 10ml purified water fully the dissolving after, pour in the above-mentioned 1L container;
2, get the 800ml purified water in above-mentioned 1L container, fully stir, transfer PH between 7.35-7.45 until dissolving fully;
3, take by weighing Mak33 0.9g in above-mentioned 1L container; Last constant volume 1000ml after the dissolving, promptly gets with the filtration of 0.2um filter fully;
Four, the preparation process of dilution, preparation 1L:
1, takes by weighing NaCl9.0g and BSA 60g in the container of 1L;
2, get 0.5ml Proclin-300 and add the dissolving of 10ml purified water, pour in the container of above-mentioned 1L;
3, last constant volume 1000ml after the dissolving, promptly gets with the filtration of 0.2um filter fully;
Five, the preparation of FT3 calibration object and FT3 quality-control product:
The concentration of FT3 antigen is respectively 1,3,6,12 in the FT3 calibration object, 25pg/ml; The concentration of FT3 antigen is respectively 3 in the FT3 quality-control product, 12pg/ml;
Six, the preparation process of cleaning fluid concentrate, preparation 1L:
1, gets TRIS 12.54g and NaCl 325.6g in the 1L container;
2, get 5g Tween-20 and in the 100ml container, add 20ml water it is dissolved fully after, pour in the above-mentioned 1L container;
3, get 0.2ml Proclin-300 in the beaker that fills the 10ml purified water fully the dissolving after, pour in the above-mentioned 1L container;
4, get the 800ml purified water in above-mentioned 1L container, fully stir, until dissolving fully;
5, transfer PH, control its scope between 7.35-7.45;
6, last constant volume 1000ml, the dissolving back is filtered with the 0.2um filter and is promptly got fully;
Seven, the preparation process of substrate solution, preparation 1L:
1, gets TRIS 2.35g, NaCl 6.41g, Na
2SO
30.002g and Proclin-300 0.2ml is in the 1L beaker;
2, get the 600ml purified water in the 1L beaker, fully stir, transfer PH between 7.95-8.05 until dissolving fully;
3, add 250ml Lumi-Phos 480, filter with the 0.2um filter and collect filtrating, be settled to 1000ml, promptly get behind the mixing with purified water.
4. let alone a described kit like claim 1-3, it is characterized in that, the method for application of said kit is following:
1), adds 15 μ l FT3 calibration objects, FT3 quality-control product, sample to be measured to corresponding test tube bottom;
2), add 30 μ l enzyme reaction things to each test tube;
3), add 30 μ l increased response agent to each test tube;
4), add 30 μ l magnetic separation agents to every-test tube;
5), cover test tube with plastic sheeting, the multitube vortex mixer behind the tube shaken frame 30s, is put 37 ℃ of water-baths 30 minutes gently;
6) put to magnetic separator, then, guarantee that every test tube all contacts with separator surface, precipitate 2 minutes, the reversing separation vessel is poured out supernatant;
7), the cleaning fluid concentrate with 20 times of purified water dilutions after, add cleaning fluid after the 200 μ l dilution to each test tube, put the mixing 30s that vibrates gently on the multitube vortex mixer;
8), added in 200 μ l substrate solution to the test tubes mixing 3 seconds, the luminous detection appearance detects.
5. kit as claimed in claim 4 is characterized in that, when said sample to be measured is high value HOOK sample, uses dilution that sample is diluted as required.
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| CN108931656A (en) * | 2018-05-09 | 2018-12-04 | 南京岚煜生物科技有限公司 | Free triiodothyronine fT3 kit and preparation and detection method are detected based on micro-fluidic chip |
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Application publication date: 20120502 |