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Nano magnetic particle chemiluminescence assay kit for hepatitis B virus e antigen and preparation method thereof

A technology of hepatitis B virus and nano-magnetic particles, which is applied in the direction of measuring devices, scientific instruments, instruments, etc., can solve problems affecting detection sensitivity and accuracy, and achieve cost advantages, high sensitivity, and low production costs

Active Publication Date: 2015-08-26
SUZHOU HAOOUBO BIOPHARML
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the actual immunoassay, due to the large amount of impurities contained in the sample to be tested, which affects the detection sensitivity and accuracy to a certain extent, the target analyte can be quickly separated and purified from the complex sample matrix. It is one of the problems faced by clinical laboratory workers

Method used

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  • Nano magnetic particle chemiluminescence assay kit for hepatitis B virus e antigen and preparation method thereof
  • Nano magnetic particle chemiluminescence assay kit for hepatitis B virus e antigen and preparation method thereof
  • Nano magnetic particle chemiluminescence assay kit for hepatitis B virus e antigen and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1 The preparation of the first reagent

[0043] (1) Materials and instruments: Hepatitis B virus e antigen monoclonal antibody preserved in phosphate buffer (purity over 95wt%, concentration 2mg / mL); fluorescein isothiocyanate (FITC), sodium carbonate and other reagents It should be chemically pure; G-25 gel purification column was purchased from GE.

[0044] (2) Preparation steps:

[0045] ① Prepare 0.5mg / mL FITC solution with 0.1~0.2mol / L carbonate buffer solution with pH 9.0~10.0;

[0046] ② Add the FITC solution prepared in step ① to the antibody solution according to the ratio of hepatitis B virus e antigen antibody to FITC molecule ratio of 1:20, mix well, let stand at room temperature for 12 hours, and react to generate e antigen antibody-FITC conjugate;

[0047] ③Separate the reaction liquid after step ② through G-25 gel column, remove unreacted FITC, and obtain the antibody-FITC conjugate containing hepatitis B virus e antigen (ie, FITC-labeled hep...

Embodiment 2

[0049] Embodiment 2 Preparation of the second reagent

[0050] (1) Materials and instruments: Hepatitis B virus e antigen monoclonal antibody preserved in phosphate buffer (purity over 95wt%, concentration 2mg / mL); alkaline phosphatase preserved in phosphate buffer (ALP solution, The purity of ALP is about 99%, the specific activity is about 1500U / mg, and the concentration is 10mg / mL); the cross-linking agent SMCC, 2-IT are purchased from THERMO company, TRIS and other chemical reagents should be chemically pure; G-25 gel purification Columns are GE products.

[0051] (2) Preparation steps:

[0052] ①Take 1mg of e-antigen antibody, add 2-4μL of 10mg / mL coupling agent 2-IT solution, let stand at room temperature for 20min, add 10μL of 0.1mol / L glycine solution, let stand at room temperature for 5min, and use G-25 gel column Remove the salt, collect the activated CA125 antibody, and store it at 2-8°C for later use;

[0053] ② Take 1.5 mg of ALP solution, add 10-20 μL of 5 mg / ...

Embodiment 3

[0056] The preparation of embodiment 3 magnetic separation reagents

[0057] (1) Materials and instruments:

[0058] Suspension of magnetic particles: the content of magnetic particles is 5wt%, and the magnetic particles contain carboxyl (COOH) active groups. The carboxyl group content per gram (g) of magnetic particles (dry weight) is not less than 0.4 millimoles (mmol), with superparamagnetism, The diameter is between 0.5-2μm.

[0059] Anti-FITC antibody: It can be a polyclonal antibody or a monoclonal antibody, with a purity of more than 90% by weight and a dilution titer of more than 1:1 million;

[0060] 2-Morpholineethanesulfonic acid (MES), carbodiimide (EDC), TRIS, and other reagents should be of chemical purity.

[0061] (2) Preparation steps:

[0062] ①Take 100mg of magnetic particle suspension, magnetically separate to remove the supernatant, and resuspend in 10mL of 0.05mol / L, pH 4.5~5 MES buffer;

[0063] ②Add 2~4mg of anti-FITC antibody and suspend at room te...

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Abstract

The invention relates to a nanometer magnetic particle chemiluminescence detection kit for a hepatitis B virus e antigen as well as a preparation method thereof and a detecting method thereof. The kit comprises a solution, which contains a fluorescein labeled hepatitis B virus e antigen antibody, a suspension, which is coated with magnetic particles of a fluorescein antibody, and a solution, which contains an alkaline phosphatase labeled hepatitis B virus e antigen antibody. According to the invention, the hepatitis B virus e antigen can be quantitatively detected with lower cost, higher accuracy and higher precision.

Description

technical field [0001] The invention belongs to the field of biotechnology, and specifically relates to a nano-magnetic particle chemiluminescence assay kit for hepatitis B virus e antigen combined with immunomagnetic particle separation technology and chemiluminescence immunoassay technology, and a preparation method and detection method thereof. Background technique [0002] Hepatitis B virus e antigen (HBeAg) is a soluble protein that exists in the core of HBV in a hidden form, and its coding genes overlap with each other, which is a subcomponent of HBcAg. After HBV infection, HBeAg may appear in the blood at the same time as HBsAg or later, and it disappears slightly earlier than HBsAg. HBsAg only exists in the blood of HBsAg-positive patients, usually accompanied by the replication of HBV DNA in the liver, there are more Dane particles in the blood and the activity of HBV DNA polymerase is increased. Therefore, HBeAg-positive is an important indicator of active replicat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/576G01N33/577G01N33/531G01N33/533G01N33/535
Inventor 于大为程晓蕾
Owner SUZHOU HAOOUBO BIOPHARML
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