Application of hypoxanthine nucleotide in preparation of anti-infective drugs

A hypoxanthine nucleotide and anti-infection technology, applied in the field of medicine, can solve problems such as unsatisfactory effect, and achieve the effect of reducing bacterial drug resistance and improving anti-infection effect

Pending Publication Date: 2021-03-30
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in practical applications, it has been found that although inosine can increase the sensitivity of

Method used

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  • Application of hypoxanthine nucleotide in preparation of anti-infective drugs
  • Application of hypoxanthine nucleotide in preparation of anti-infective drugs
  • Application of hypoxanthine nucleotide in preparation of anti-infective drugs

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1 sample preparation

[0033]Pick a single bacterial colony and inoculate it in 5mL LB medium at 37°C (Escherichia coli, Klebsiella pneumoniae, multi-drug resistant Staphylococcus aureus, Pseudomonas aeruginosa, Acinetobacter baumannii, and sexual streptococcus or cultured at 30°C (Aeromonas hydrophila, Edwardsiella tarda, Vibrio alginolyticus, Vibrio parahaemolyticus) at 200rpm for 16 hours; Or cultivate to OD at 30℃200rpm 600 1.0, take an appropriate amount of bacterial liquid at 8000rpm, centrifuge for 5min to collect the bacterial cells, remove the supernatant and wash the bacterial cells with an equal volume of 0.85% saline for 3 times, suspend in 1×M9 (containing 10mM sodium acetate, 2mM MgSO 4 , 0.1 mM CaCl 2 ), and adjust the concentration of the bacterium solution to 10 in the M9 medium 6 CFU / mL (diluted 1000 times); aliquot into 5mL test tubes for later use.

Embodiment 2

[0034] Embodiment 2 xanthine nucleotides and inosine improve bacterial sensitivity to antibiotics effect determination

[0035] Every kind of bacterial sample prepared in embodiment 1 is divided into 3 groups, 2 experimental groups add 10mM inosine nucleotide (IMP) and inosine (Inosine) respectively, another control group adds equal volume normal saline; Add corresponding antibiotics to all test tubes, three biological repetitions; incubate in a shaker at 37°C 200rpm for 6 hours, then take 100 μL and use serial dilution method, take 10 μL respectively for plate counting, and calculate bacterial CFU / mL (colony forming unit Bacterial colony number at 20-200 data can be used for statistical analysis; Bacterial survival rate (percent survival) is the bacterium CFU / the bacterium quantity that only adds antibiotic × 100%.

[0036] See results Figure 1~2 , it can be seen from the figure that for Klebsiella pneumoniae R10, inosine can increase its sensitivity to gentamicin by about...

Embodiment 3

[0039] Example 3 hypoxanthine nucleotides can improve the sensitivity of Escherichia coli to ampicillin

[0040] The prepared Escherichia coli K12 samples were divided into 3 groups, 7.5mM inosine nucleotide (IMP) and hypoxanthine (Hypoxanthine) were added to the 2 experimental groups, and an equal volume of normal saline was added to the control group, each Add 100 μg / ml ampicillin to all test tubes, three biological repetitions; incubate in a 200 rpm shaker at 37°C for 6 hours, then take 100 μL and use serial dilution method, take 10 μL respectively for plate counting, and calculate the bacterial CFU / mL (colony formation units / ml). The data with the number of bacterial colonies in the range of 20-200 can be used for statistical analysis. Bacterial survival rate (percent survival) is bacterial CFU after hypoxanthine compound and / or antibiotic treatment / initial bacterial number×100%.

[0041] See results image 3 , as can be seen from the figure, the survival rate of bacter...

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Abstract

The invention belongs to the technical field of medicine, and particularly relates to application of hypoxanthine nucleotide in preparation of anti-infective drugs. Experiments prove that the hypoxanthine nucleotide can significantly improve the sensitivity of Escherichia coli, Klebsiella pneumoniae, staphylococcus aureus multi-drug-resistant bacteria, pseudomonas aeruginosa and other bacteria toamoxicillin, cefoperazone, meropenem, gentamicin and other antibiotics, so that the hypoxanthine nucleotide can be used as an anti-infective drug together with antibiotics. Bacteria are killed under the condition of low-concentration antibiotics, a good anti-infection effect is achieved, and meanwhile bacterial drug resistance is reduced.

Description

technical field [0001] The invention belongs to the technical field of medicine. More specifically, it relates to the application of inosine nucleotide in the preparation of anti-infective drugs. Background technique [0002] As the main drug for the treatment of bacterial infectious diseases, antibiotics are the most widely used, fastest growing and most diverse class of drugs in the world. However, with the widespread use of antibiotics, drug resistance has become increasingly prominent. The World Health Organization (WHO) clearly pointed out in the 2007 "World Health Report" that bacterial drug resistance is a major public health problem that threatens human health. [0003] At present, the commonly used method to combat bacterial resistance is to increase the susceptibility of bacteria to antibiotics, so that the originally ineffective or ineffective antibiotics become effective or efficient, thereby killing the bacteria. For example, Chinese patent application CN1046...

Claims

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Application Information

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IPC IPC(8): A61K31/708A61K45/06A61P31/04
CPCA61K31/708A61K45/06A61P31/04A61K2300/00Y02A50/30
Inventor 李惠彭博彭宣宪赵贤亮匡素芳
Owner SUN YAT SEN UNIV
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