Apolipoprotein E detection kit

A detection kit and apolipoprotein technology, applied in the field of human biological protein detection, can solve the problems of low operator risk, specificity, poor affinity, low antibody titer, etc.

Active Publication Date: 2014-12-10
NINGBO RUI BIO TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] Known methods for measuring ApoE include chromatography, electrophoresis, and immunoassay. Among them, chromatography and electrophoresis are cumbersome to operate, and they cannot perform batch sample analysis and directly go to full-automatic biochemical analyzers. Immunodiffusion, radioimmunoassay, fluorescence-labeled immunoassay, enzyme-labeled immunoassay, and chemiluminescence immunoassay also have many deficiencies; if special equipment is required, the sample needs to be processed, and it cannot be used on a fully automatic biochemical analyzer Perform batch monitoring and analysis, etc.
The immunoturbidimetric method commonly used in clinical practice is popular because of its small amount of sample, which can be directly analyzed in batches on a fully automatic biochemical analyzer, and is easy to operate; however, the currently established methods and reagents have some shortcomings and deficiencies, mainly in : First, the antibody titer is not high, and the specificity, affinity, and affinity are not good; second, the calibration serum is based on human serum, although the human serum with negative hepatitis B surface an

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] In this example, the kit A was prepared by using the ApoE antibody purified from the ApoE antiserum by the ammonium sulfate method.

[0058] 1) ApoE antibody purification

[0059] Slowly add solid ammonium sulfate at 0.25 g / mL serum to 100 ml of ApoE antiserum, stir in an ice-water bath for 2 hours, and let stand for 2 hours. Centrifuge at 10,000 rpm for half an hour, discard the supernatant, and dissolve the ammonium sulfate precipitate with phosphate buffer. The resuspension was dialyzed against PBS until the dialysate was free of ammonium ions. The dialyzed antibody was centrifuged at 10000rpm for half an hour, the supernatant was taken to obtain the ApoE antibody, and the volume was adjusted to 100ml with PBS.

[0060] 2) Reagent R1 (the reagent is a colorless and transparent solution): pH7.4

[0061] Phosphate buffer 25mmol / L

[0062] Polyethylene glycol 6000 25g / L

[0063] Sodium chloride 100mmol / L

[0064] Tween 20 0.1%

[0065] NaN3 0.1%

[0066] BSA 0.1...

Embodiment 2

[0077] In this example, the kit B was prepared by using the ApoE antibody purified from the ApoE antiserum by the ammonium sulfate-DEAE ion column method.

[0078] 1) ApoE antibody purification

[0079] Slowly add solid ammonium sulfate at 0.25 g / mL serum to 100 ml of ApoE antiserum, stir in an ice-water bath for 2 hours, and let stand for 2 hours. Centrifuge at 10,000 rpm for half an hour, discard the supernatant, and dissolve the ammonium sulfate precipitate with PBS solution. The resuspension was fully dialyzed against 20mM PBS pH 6.0, centrifuged to take the supernatant, passed through a DEAE anion chromatography column equilibrated with 20mM PBS pH 6.0, and the passing liquid was collected to obtain the ApoE antibody, and 1 / 10 volume of 10 ×PBS.

[0080] 2) Reagent R1 (the reagent is a colorless and transparent solution): pH7.4

[0081] Phosphate buffer 25mmol / L

[0082] Polyethylene glycol 6000 25g / L

[0083] Sodium chloride 100mmol / L

[0084] Tween 20 0.1%

[008...

Embodiment 3

[0097] The difference between this embodiment and embodiment 1 is only:

[0098] 1) Reagent R1 (the reagent is a colorless and transparent solution): pH7

[0099] Phosphate buffer 10mmol / L

[0100] Polyethylene glycol 6000 15g / L

[0101] Sodium chloride 50mmol / L

[0102] Tween 20 0.02%

[0103] NaN3 0.1%

[0104] BSA 0.01%

[0105] 2) Reagent R2 (the reagent is a colorless and transparent solution): pH7

[0106] Phosphate buffer 10mmol / L

[0107] Sodium chloride 75mmol / L

[0108] NaN3 0.1%

[0109] Tween 20 0.15%

[0110] ApoE antibody 20% (v / v)

[0111] 3) ApoE reference standard

[0112] The standard in standard diluent is: 50mM phosphate buffer, 125mM NaCl, 1%BSA, 0.2mM EDTA, 0.12% Tween 20, 0.1%NaN 3 , pH7, tested with a commercially available control reagent and adjusted to ApoE antigen 120mg / L, aliquoted and stored at -20°C. Take it out before use, and dilute it into different concentrations of ApoE standard with standard diluent (ApoE antigen concentration: 0...

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Abstract

The invention discloses an apolipoprotein E detection kit which comprises a reagent R1, a reagent R2 and a calibration product. The reagent R1 mainly comprises the following components: 10-50mmol/L of phosphate buffer, 10-40g/L of polyethylene glycol, 50-200mmol/L of sodium chloride, 0.02-0.2% of tween 20, 0.1-1% of BSA (Bovine Serum Albumin) and 0.1% of NaN3, wherein polyethylene glycol is low-polymerization polyethylene glycol. The reagent R2 mainly comprises the following components: 10-50mmol/L of phosphate buffer, 50-200mmol/L of sodium chloride, 0.02-0.2% of tween 20, 10-50% (v/v) of ApoE antibody and 0.1% of NaN3; the calibration product mainly comprises the following components: 10-50mmol/L of phosphate buffer, 50-200mmol/L of sodium chloride, 0.1-1% of BSA, 0.2-5mmol/L of EDTA (Ethylene Diamine Tetraacetic Acid), 0.02-0.2% of tween 20, 0.1% of NaN3 and 0-120mg/L of ApoE antigen. The apolipoprotein E detection kit is convenient to use, good in reagent stability, good in detection result accuracy, good in repeatability, convenient to use, low in cost and convenient to popularize and apply.

Description

[0001] technical field [0002] The invention relates to a human biological protein detection technology, in particular to an apolipoprotein E detection kit. [0003] The meanings of the following expressions in this application are: [0004] 0.2M sodium dihydrogen phosphate: indicates that the concentration of sodium dihydrogen phosphate in the solution is 0.2mol / L; [0005] 0.1% NaN 3 : Indicates adding NaN to every 100mL solution 3 0.1g; [0006] ApoE antibody 10-50% (v / v): the amount of ApoE antibody added in reagent R2 accounts for 10-50% of the total volume of reagent R2, in ml / ml; [0007] BSA: bovine serum albumin; [0008] EDTA: ethylenediaminetetraacetic acid; [0009] PBS: phosphate; [0010] The meanings expressed in this application that are similar to the above expressions are similar to the above meanings; unless otherwise stated in the application. [0011] Background technique [0012] Apolipoprotein E (ApoE) is a glycoprotein of 299 amino acids bou...

Claims

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Application Information

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IPC IPC(8): G01N33/68
CPCG01N33/536G01N33/68
Inventor 方蓉张闻陈媛陈思思周海滨王建飞
Owner NINGBO RUI BIO TECH
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