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A method for detection of PD-1 in T cells based on the quality assessment of cellular mitochondria

A detection method, PD-1 technology, applied in measurement devices, material excitation analysis, fluorescence/phosphorescence, etc., can solve the problems of deviation of detection results, inability to obtain accurate solid tissue, etc.

Active Publication Date: 2021-08-10
UB BIOTECHNOLOGY ZHEJIANG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Monoclonal antibody drugs developed based on the mechanism of PD-1 / PD-L1 have also been marketed and widely used in clinical practice. The marketed monoclonal antibody drugs generally have corresponding companion diagnostic reagents. A large number of studies have shown that tumor tissue samples The higher the expression level of PD-L1, the better the patient's response to PD-1 / PD-L1 inhibitory therapy. The PD-L1 expression level in tumor tissue is currently the most widely used PD-1 / PD-L1 inhibitor in clinical research, verification and approval. Drug therapy prediction markers, but the general histopathological detection is in the case of a tumor, and its solid tissue parts can be obtained. In many cases, it may not be possible to obtain accurate solid tissue, resulting in deviations in test results. At the same time, the main method of this kind of detection is immunohistochemistry, which needs to be read and diagnosed by pathologists, which has subjective influence

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  • A method for detection of PD-1 in T cells based on the quality assessment of cellular mitochondria
  • A method for detection of PD-1 in T cells based on the quality assessment of cellular mitochondria
  • A method for detection of PD-1 in T cells based on the quality assessment of cellular mitochondria

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no. 1 example

[0041] A method for detecting PD-1 in T cells based on cell mitochondrial quality assessment, comprising the following steps:

[0042] S10: Obtaining T cells; including:

[0043] S11: Using lymphocyte separation medium to extract and separate human peripheral blood samples to obtain PBMCs;

[0044] S12: adding antibody-coated magnetic beads to the PBMC, and incubating at room temperature for 20 minutes to obtain labeled T cells;

[0045] S13: adding a buffer to the labeled T cells for washing, then adding an elution buffer, and incubating at 30° C. for 20 minutes; finally washing with the buffer to obtain the T cells.

[0046] Wherein, the buffer is PBS buffer containing 1% FBS; and the elution buffer contains 300U / mL chymopapain.

[0047] S20: adding CD4 PE Cyanine7 and PD-1 PE antibodies to the T cells to obtain sample 1;

[0048] S30: adding a mitochondrial probe to the sample 1, incubating at 37° C. for 30 minutes, using the mitochondrial fluorescent probe as a cell met...

no. 2 example

[0052] In this embodiment, the expression level of PD-1 in infected samples is detected, and the specific steps are as follows:

[0053] S10: Obtaining T cells; including:

[0054] S11: Using lymphocyte separation medium to extract and separate human peripheral blood samples to obtain PBMCs;

[0055] S12: adding antibody-coated magnetic beads to the PBMC, and incubating at room temperature for 30 minutes to obtain labeled T cells;

[0056] S13: adding a buffer to the labeled T cells for washing, then adding an elution buffer, and incubating at 37° C. for 30 minutes; finally washing with the buffer to obtain the T cells.

[0057] Wherein, the buffer is PBS buffer containing 1% FBS; and the elution buffer contains 100 U / mL chymopapain.

[0058] S20: adding CD4 PE Cyanine7, CD8 FITC and PD-1 PE antibodies to the T cells to obtain sample 1;

[0059] S30: adding a mitochondrial probe to the sample 1, incubating at 37° C. for 30 minutes, using the mitochondrial fluorescent probe ...

no. 3 example

[0063] In this embodiment, the expression level of PD-1 in tumor samples is detected, and the specific steps are as follows:

[0064] S10: Obtaining T cells; including:

[0065] S11: Using lymphocyte separation medium to extract and separate human peripheral blood samples to obtain PBMCs;

[0066] S12: adding antibody-coated magnetic beads to the PBMC, and incubating at room temperature for 30 minutes to obtain labeled T cells;

[0067] S13: adding a buffer to the labeled T cells for washing, then adding an elution buffer, and incubating at 37° C. for 30 minutes; finally washing with the buffer to obtain the T cells.

[0068] Wherein, the buffer is PBS buffer containing 1% FBS; and the elution buffer contains 100 U / mL chymopapain.

[0069] S20: adding CD4 PE Cyanine7, CD8 FITC and PD-1 PE antibodies to the T cells to obtain sample 1;

[0070] S30: adding a mitochondrial probe to the sample 1, incubating at 37° C. for 30 minutes, using the mitochondrial fluorescent probe as ...

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Abstract

An embodiment of the present invention provides a T cell PD‑1 detection method based on cell mitochondrial quality assessment, comprising the following steps: S10: obtaining T cells; S20: adding a fluorescently labeled monoclonal antibody to the T cells to circle Helper T cells, and / or, cytotoxic T cells; adding a fluorescently labeled PD-1 antibody at the same time to obtain a sample 1; S30: adding a mitochondrial probe to the sample 1, using the mitochondrial probe As an indicator of cell metabolism, MT-group and MT+ group are divided to obtain sample 2; S40: use flow cytometry to detect the sample 2 to obtain the expression of PD-1 at different metabolic levels; wherein, MT The ‑group is a low-intensity expression group after mitochondrial probe staining, and the MT+ group is a high-intensity expression group after mitochondrial probe staining. The technical solution provided by the present invention refines the detection and expression of PD‑1 through mitochondrial quality assessment, making the detection results more accurate.

Description

technical field [0001] The invention relates to the field of in vitro detection, in particular to a T cell PD-1 detection method based on cell mitochondrial quality assessment. Background technique [0002] The full name is programmed cell death protein-1 (PD-1), which is an important immunosuppressive molecule, which can be continuously expressed on T and B lymphocytes, and at the same time, the expression on the surface of activated T cells will be up-regulated , the signal it provides can inhibit cell activation and induce cell apoptosis, thereby down-regulating the immune response and maintaining the homeostasis of cells. PD-1 was originally cloned from the apoptotic mouse T cell hybridoma 2B4.11, and the immune regulation targeting it is of great significance in anti-tumor, anti-infection, anti-autoimmune diseases and organ transplantation survival. Its ligand PD-L1 is also an important target, and related antibodies play the same role. The combination of PD-1 and PD-...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/577G01N33/543G01N33/533G01N21/64
CPCG01N21/6428G01N33/533G01N33/54326G01N33/577G01N2021/6439
Inventor 李国平黄兴琳李文娟严崇虎
Owner UB BIOTECHNOLOGY ZHEJIANG CO LTD