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Use of IFI44L gene and PI3 gene in preparation of diagnostic bacterial/viral infection kit

A virus infection and kit technology, applied in the field of biomedicine, can solve problems such as specificity and sensitivity not meeting clinical needs, missed diagnosis, misdiagnosis of patients, etc., and achieve the effect of being conducive to early diagnosis, high sensitivity and strong specificity

Pending Publication Date: 2019-10-29
王刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to an authoritative medical review in 2018, the diagnostic accuracy of blood routine is 57.4%, that of CRP is 64.3%, and that of PCT is 65.6%. The specificity and sensitivity of these indicators cannot meet the clinical needs, resulting in misdiagnosis and missed diagnosis of many patients.
The medical community has been trying to find better diagnostic indicators for bacterial infections, but detection methods at the protein level or cell level cannot meet clinical needs

Method used

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  • Use of IFI44L gene and PI3 gene in preparation of diagnostic bacterial/viral infection kit
  • Use of IFI44L gene and PI3 gene in preparation of diagnostic bacterial/viral infection kit
  • Use of IFI44L gene and PI3 gene in preparation of diagnostic bacterial/viral infection kit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1. Screening for differentially expressed genes in the state of bacterial infection and viral infection

[0041] 1. Clinical research object:

[0042] Two groups of patients with definite bacterial infection and definite viral infection in febrile period were selected, with 30 patients in each group.

[0043] Diagnostic criteria:

[0044] (1) The definite bacterial infection group refers to patients with bacterial infection confirmed by culture;

[0045] (2) The definite viral infection group includes only patients with viral infection confirmed by culture, molecular or immunofluorescence detection, and no features of coexisting bacterial infection.

[0046] Exclusion criteria: patients with bone marrow transplantation, immunodeficiency or immunosuppressive therapy that may affect gene expression.

[0047] All research subjects signed the informed consent.

[0048] 2. Sample collection

[0049] During the febrile period, blood samples were drawn at the same...

Embodiment 2

[0084] Embodiment 2, qPCR verifies the relation of IFI44L gene and PI3 gene and bacterial infection, virus infection disease

[0085] 1. Research object:

[0086] 35 patients with confirmed bacterial infection and 36 patients with confirmed viral infection were selected during the febrile period.

[0087] Diagnostic criteria:

[0088] (1) The definite bacterial infection group refers to patients with bacterial infection confirmed by culture;

[0089] (2) The definite viral infection group includes only patients with viral infection confirmed by culture, molecular or immunofluorescence detection, and no features of coexisting bacterial infection.

[0090] 2. Total RNA extraction from blood

[0091]Use the UNIQ-10 Column Trizol Total RNA Extraction Kit to extract the total RNA from the blood of the above-mentioned patients with fever. The extraction steps are as follows:

[0092] (1) EDTA anticoagulant blood 2-3mL whole blood, immediately use RNase-free EP tubes to aliquot a...

Embodiment 3

[0117] Example 3, qPCR re-verified the relationship between IFI44L gene and PI3 gene and bacterial infection and viral infection

[0118] 1. Research object:

[0119] 42 patients with confirmed bacterial infection, 56 patients with confirmed viral infection and 31 healthy controls (HC) were selected.

[0120] Diagnostic criteria:

[0121] (1) The definite bacterial infection group refers to patients with bacterial infection confirmed by culture;

[0122] (2) The definite viral infection group includes only patients with viral infection confirmed by culture, molecular or immunofluorescence detection, and no features of coexisting bacterial infection.

[0123] 2. Total RNA extraction from blood

[0124] Use the UNIQ-10 Column Trizol Total RNA Extraction Kit to extract the total RNA from the blood of the above-mentioned patients with fever. The extraction steps are as follows:

[0125] (1) EDTA anticoagulant blood 2-3mL whole blood, immediately use RNase-free EP tubes to aliq...

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Abstract

The invention relates to use of an IFI44L gene and a PI3 gene in preparation of a diagnostic bacterial / viral infection kit. According to the use of the IFI44L gene and the PI3 gene in preparation of the diagnostic bacterial / viral infection kit, it is proved that characteristic change of the IFI44L gene and the PI3 gene exists in diseases infected through bacteria and virus for the first time, thekit for diagnosing bacterial / viral infection is provided, the kit comprises a TaqMan polymerase chain reaction system, a primer pair for amplifying the IFI44L gene and the PI3 gene and reference genes, and a TaqMan fluorescence probe, and the TaqMan polymerase chain reaction system comprises qPCR buffering liquid, dNTPs, TaqDNA polymerase. Compared with the prior art, the accuracy reaches above 90% by using the diagnostic kit for detecting bacterial infection and viral infection, the diagnostic kit has the characteristics of fastness, reliability, high specificity and high sensibility, and theearly diagnosis of infectious diseases is facilitated.

Description

technical field [0001] The invention relates to the use of IFI44L gene and PI3 gene in preparing a kit for diagnosing bacterial / virus infection, and belongs to the technical field of biomedicine. Background technique [0002] Bacterial infection is one of the main diseases that threaten human health. There are traces of bacterial infection on ancient Egyptian mummies. From the "Black Death" that ravaged Europe for many years in the Middle Ages to the multiple outbreaks of cholera in my country in the last century, they are all painful memories of bacterial infections that seriously threaten human health. According to 2017 data, more than 15 million people died directly from bacterial infection in the world. [0003] Since the British Fleming discovered penicillin in 1929, mankind has entered the era of antibiotics, and antibiotics have saved thousands of lives. However, today, more than half a century later, anti-infection treatment has not become easier, on the contrary ,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12Q1/689C12Q1/70C12Q1/6851C12Q1/06
CPCC12Q1/689C12Q1/701C12Q1/6851C12Q2600/158C12Q2600/166
Inventor 王刚
Owner 王刚
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