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Joint inspection reagent for encephalitis

A reagent and joint inspection technology, applied in the field of immunoassay, can solve the problems of reducing detection accuracy and false positives, and achieve the effects of saving detection time, strong specificity, and improving accuracy

Pending Publication Date: 2022-07-01
GUANGZHOU WEIMI BIOLOGICAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] It is currently reported that monochrome fluorescence is used in the detection of anti-NMDAR antibodies, anti-LGI1 antibodies, anti-GABARB1 / B2 antibodies, anti-AMPAR1 antibodies, anti-AMPAR2 antibodies, and anti-CASPR2 antibodies. Single-color fluorescence can easily lead to false positives during detection, which reduces the accuracy of detection. sex

Method used

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  • Joint inspection reagent for encephalitis
  • Joint inspection reagent for encephalitis
  • Joint inspection reagent for encephalitis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Example 1: Preparation of reagents for joint detection of encephalitis

[0042] A combined detection reagent for encephalitis, the reagent comprises a well plate reagent, a goat anti-human secondary antibody labeled with Dylight 488, and a phosphate buffer; wherein the well plate is a 96-well plate, and the well plate reagent comprises NMDAR, LGI1 expressing labeled mCherry fluorescent protein , GABARB1 / B2, AMPAR1, AMPAR2, CASPR2 transfected cells and blank vector expressing mCherry-labeled fluorescent protein transfected cells, transfected cells in different sample wells.

[0043]1) NMDAR, LGI1, GABARB1 / B2, AMPAR1, AMPAR2, CASPR2 transfected cells expressing marker mCherry (red fluorescent protein) and blank vector transfecting cells expressing marker mCherry were cultured in the sample wells of 96-well plate, respectively. Observe the cell growth under a microscope, and wait for the cells to rise to nearly 100%;

[0044] 2) Remove the medium and wash with 1×PBS;

[...

Embodiment 2

[0047] Example 2: Encephalitis joint detection reagent for the detection of cerebrospinal fluid

[0048] The reagents prepared in Example 1 are used for the detection of anti-NMDAR antibody, anti-LGI1 antibody, anti-GABARB1 / B2 antibody, anti-AMPAR1 antibody, anti-AMPAR2 antibody and anti-CASPR2 antibody as follows:

[0049] 1) Prepare cerebrospinal fluid samples, add 30µl-50µl of diluted cerebrospinal fluid to the sample wells on the 96-well plate;

[0050] 2) Incubate at 37°C for 1 hour or at 4°C overnight;

[0051] 3) Wash 3 times with 1×PBS, 3 minutes each time;

[0052] 4) Drain 1×PBS thoroughly, add 30µl-50µl fluorescent Dylight 488-labeled goat anti-human secondary antibody to the sample wells on the plate, and incubate at 37°C for 30 minutes;

[0053] 5) Wash 3 times with 1×PBS, 3 minutes each time;

[0054] 6) Add 30µl-50µl of 1×PBS to the sample well;

[0055] 7) Place the well plate under a fluorescence microscope for microscopic examination.

Embodiment 3

[0056] Example 3: Interpretation of anti-NMDAR antibodies in samples by fluorescence microscopy

[0057] The interpretation method of the orifice plate that embodiment 2 handles is as follows:

[0058] 1) Use a fluorescence microscope to observe the emitted fluorescent spots at a wavelength of 518 nm and 610 nm, respectively, by observing whether green fluorescent spots or red fluorescent spots are emitted;

[0059] 2) Compare the positions and features of the green fluorescent spots with the positions of the red fluorescent spots to see if they overlap;

[0060] 3) If the position of the green fluorescent spot and the position of the red fluorescent spot can overlap, and the characteristics are basically the same, it can be determined that the sample contains anti-NMDAR antibody;

[0061] 4) If the green fluorescent spots cannot be emitted; or the positions of the green fluorescent spots and the red fluorescent spots cannot overlap; or the positions of the green fluorescent ...

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Abstract

The invention provides an encephalitis joint inspection reagent, which comprises a pore plate reagent, a fluorescently-labeled secondary antibody and a phosphate buffer solution, and is characterized in that the pore plate reagent comprises NMDAR, LGI1, GABARB1 / B2, AMPAR1, AMPAR2 and CASPR2 transfection cells for expressing labeled fluorescent protein and blank vector transfection cells for expressing labeled fluorescent protein; the fluorescence in the fluorescently-labeled secondary antibody and the fluorescence in the transfected cell for expressing the fluorescent protein are fluorescence of different color systems. The method is used for judging whether a sample contains a target antibody or not through fluorescence and fluorescence combination of different color systems.

Description

technical field [0001] The invention belongs to the field of immune detection, in particular to a reagent for joint detection of encephalitis. Background technique [0002] Autoimmune encephalitis (AE) generally refers to a class of encephalitis mediated by autoimmune mechanisms. AE is a rare disease with an estimated annual incidence of 1-5 cases per million population, with a higher incidence in African Americans than in Caucasians. At present, the prevalence of AE accounts for 10% to 20% of encephalitis cases. Anti-N-methyl-D-aspartate receptor (NMDAR) antibody encephalitis is the most common, accounting for about 80% of AE patients. Anti-leucine-rich glioma inactivating protein-1 (LGI1), gamma aminobutyric acid type A receptor (GABARB1 / B2), alpha amino-3-hydroxy- 5-Methyl-4-isoxazole propionic acid receptor 1 (AMPAR1), α-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptor 2 (AMPAR2), contactin-related protein 2 (CASPR2), dipeptide-like protein 6 (DPPX), IgLON...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/68G01N33/533
CPCG01N33/6893G01N33/533G01N2800/24
Inventor 刘书虎其他发明人请求不公开姓名
Owner GUANGZHOU WEIMI BIOLOGICAL SCI & TECH