CN116270583B - Application of 7, 8-split ring lignans in preparation of medicines for preventing and treating novel coronavirus and acute pneumonia - Google Patents
Application of 7, 8-split ring lignans in preparation of medicines for preventing and treating novel coronavirus and acute pneumonia Download PDFInfo
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K31/00—Medicinal preparations containing organic active ingredients
- A61K31/21—Esters, e.g. nitroglycerine, selenocyanates
- A61K31/215—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids
- A61K31/216—Esters, e.g. nitroglycerine, selenocyanates of carboxylic acids of acids having aromatic rings, e.g. benactizyne, clofibrate
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P11/00—Drugs for disorders of the respiratory system
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
- A61P31/14—Antivirals for RNA viruses
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change
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- Animal Behavior & Ethology (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
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Abstract
The invention provides a preparation method of 7, 8-secoisolariciresinol diglucoside containing 3CL pro Use of protease viruses and inflammatory drugs. Compound 1 and/or compound 2 are capable of inhibiting 3CL pro The protease activity achieves the effect of inhibiting viruses, and the inflammatory reaction is inhibited by inhibiting the NO secretion of macrophages and the expression of relevant inflammatory factors in the lung. Experimental research results show that the compound 1 and/or the compound 2 can be used for preventing and treating the novel coronavirus diseases and pneumonia.
Description
Technical Field
The invention relates to the technical field of medicines, in particular to application of 7, 8-split ring lignans in preparation of medicines for preventing and treating novel coronaviruses and acute pneumonia.
Background
Lignans exist in plants, belong to a plant estrogen, and have the effects of scavenging free radicals in bodies and resisting oxidation. The semen Lini and semen Sesami contains high lignans, and cereal foods (such as rye, wheat, oat, barley, etc.), soybean, cruciferous plants (such as broccoli) and fruits (such as strawberry) also contain lignans. The lignan compound is generally polymerized by two molecules of phenylpropanoid derivatives (C6-C3 monomers), is a natural compound, and is mostly free, and only a few glycosides can be combined with sugar. Lignans bind to estrogen receptors and interfere with the carcinotropic effects. Therefore, it is possible to have preventive and therapeutic effects on breast cancer, prostate cancer, colon cancer, etc. Patent CN201410608106 relates to the isolation of novel 7, 8-secoisolariciresinol diglucoside from Saurururaceae medicinal plants, and its preparation method and use, and the results of the study show that the compound has vasodilation effect and can be used for preventing and treating cardiovascular diseases.
Coronaviruses are a type of coronavirus, which is known to have the largest genome among RNA viruses. Since the first isolation of human pathogenic coronaviruses in 1965, 7 coronaviruses have been found to cause disease in humans, among which: coronaviruses HCoV-229E, HCoV-NL63, HCoV-HKU1, HCoV-OC43 can cause mild respiratory diseases in humans, which clinically account for 10% -30% of respiratory infectious diseases; coronaviruses SARS-CoV, MERS-CoV and SARS-CoV-2 (novel coronaviruses) are highly pathogenic coronaviruses with mortality rates as high as 10% -30%.
SARS-CoV-2 encodes an essential 3CL pro Proteases, the major proteases that cleave and process RNA in the viral self-code. 3CL has been found in 12 viruses at present pro Protease, and 3CL pro The protease is highly conserved among different coronaviruses, and homologous proteins are not present in human bodies, which means that the protease can be used as a drug target to perform inhibitor design, so that good selectivity and safety expectation can be achieved. 3CL pro High conservation in beta coronavirus, and 3CL screened out pro Inhibitors have broad spectrum anti-coronavirus activity. [1]
The anti-new coronavirus drug PF-07321332/ritonavir tablet (Paxlovid) consists of two antiviral drugs, wherein PF-07321332 is Nemactrevir (Nirmatrevir), which is 3CL of new coronavirus pro Protease inhibitors.
At present, the prevention and treatment of novel coronaviruses are still a weak link, although various types are aimed at 3CL pro The results of protease studies were subsequently published, different 3CL pro Protease inhibitors continue to be presented to humans, but have been very limited in their clinical access. Therefore, the development of new drugs with rapid, safe and effective effects is still urgent for preventing and treating novel coronaviruses.
The infection of the new coronavirus can cause the occurrence of pneumonia, and the symptoms mainly comprise fever, dry cough, limb weakness and the like. Because of obvious hypoimmunity of patients, the symptoms of repeated fever are generated, and thorough treatment cannot be achieved by oral administration of medicines; the lung health condition can be influenced during the onset period, so that the patient can generate frequent dry cough, the symptoms such as stimulating cough and expectoration and the like, part of serious cases can be caused to have different degrees of dyspnea and hypoxia after one week of onset, and serious patients can rapidly progress to acute respiratory distress syndrome and sepsis shock. Some patients infected with the novel coronavirus may develop conjunctivitis symptoms.
The application of 7, 8-secoisolariciresinol diglucoside in preventing and treating the novel coronavirus is not disclosed in the prior art, and the effect of the 7, 8-secoisolariciresinol diglucoside on the infection of the novel coronavirus is not known.
[1]V Mody,Ho J,Wills S,et al.Identification of 3-chymotrypsin like protease(3CLPro)inhibitors as potential anti-SARS-CoV-2agents[J].Communications Biology,2021,4(1):93.
Disclosure of Invention
The present invention aims at solving the problem of medicine development for preventing and curing SARS-CoV-2 virus caused diseases in the prior art, and provides a new medicine for preventing and curing SARS-CoV-2 virus infection and relieving pneumonia symptom.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
in one aspect, the invention provides a method for preparing and controlling 3 CL-containing 7, 8-split ring lignans pro Use of protease viruses in medicine.
Preferably, the 7, 8-secoisolariciresinol diglucoside is selected from one or two of compound 1 (rel- (1S, 2R) -1- (3, 4-dimethoxyphenyl) -2-methyl-3-oxo-3, 4-dimethoxy benzoate) and compound 2 (rel- (1S, 2S) -1- (3, 4-dimethoxyphenyl) -2-methyl-3-oxo-3, 4-dimethoxy benzoate), and has the following structural formula:
in some embodiments, compound 1 and compound 2 are used alone.
In other embodiments, compound 1 and compound 2 are used in combination.
The compound 1 and/or the compound 2 inhibit 3CL pro Protease in vitro enzyme activity to achieve diseasePreventing and treating effect of toxin.
Preferably, the virus is SARS-CoV-2 virus.
Further, the SARS-CoV-2 virus can be an original strain or a variant strain, including but not limited to: one or more of Delta strain, beta strain, omacron strain, delta strain, epsilon strain, zeta strain, eta strain, theta strain, iota strain, kappa strain, lambda strain.
In particular, the dosage forms of the medicament include, but are not limited to, tablets, liquids, capsules, powders, suppositories or granules.
Specifically, the medicine also comprises other pharmaceutically acceptable auxiliary materials.
Further specifically, the pharmaceutically acceptable excipients include, but are not limited to: starch, hu Jing, sucrose, lactose, microcrystalline cellulose.
In yet another aspect, the invention provides the use of 7, 8-secoisolariciresinol diglucoside in the manufacture of a medicament for the prevention and treatment of inflammation.
Preferably, the 7, 8-split ring lignans are selected from compound 1 and/or compound 2.
Further, the compound 1 and/or compound 2 inhibits macrophage NO secretion and expression of related inflammatory factors in the lung, thereby inhibiting inflammatory response.
Preferably, the inflammation is pneumonia.
Further preferably, the pneumonia is acute pneumonia.
Further preferably, the pneumonia is a pneumonia caused by SARS-CoV-2 virus.
In particular, the dosage forms of the medicament include, but are not limited to, tablets, liquids, capsules, powders, suppositories or granules.
Specifically, the medicine also comprises other pharmaceutically acceptable auxiliary materials.
Further specifically, the pharmaceutically acceptable excipients include, but are not limited to: starch, hu Jing, sucrose, lactose, microcrystalline cellulose.
The invention has the technical effects that:
the invention inhibits 3CL by compound 1 and compound 2 pro Protease in vitro enzyme Activity experiments find that active Compound 1 and Compound 2 vs. 3CL pro The protease has better inhibition activity, and the inhibition rate at 8 mu M is 55.13 +/-2.45% and 52.78 +/-1.39% respectively. Through the measurement of inhibiting the RAW264.7 macrophage from generating NO by the compound 1 and the compound 2, the compound 1 and the compound 2 can be found to obviously inhibit the generation of NO at the concentration of 50 mu M. In subsequent mouse experiments, it is proved that the compound 1 and the compound 2 can obviously reduce the expression of IL-6, TNF-alpha, IL-8 and IL-1 beta in alveolar lavage fluid, thereby reducing lung inflammation. The lung histopathological pictures of mice also show that compound 1 and compound 2 (20 mg/kg) can significantly reduce inflammatory exudates between bronchoalveoli, significantly reduce inflammatory cell infiltration, and maintain the integrity of bronchial epithelial cells. The test results show that the compound 1 and the compound 2 not only can inhibit SARS-CoV-2, but also can relieve symptoms of pneumonia diseases, thereby laying a foundation for the prevention and treatment of viral pneumonia by the compound 1 and the compound 2.
Drawings
FIG. 1 shows that the compounds GC376, 1,2 vs. 3CL at a concentration of 8. Mu.M pro Inhibition of protease activity.
FIG. 2 is Compound 1 and 2 vs. 3CL pro IC for inhibiting protease 50 Fitting a curve.
FIG. 3 shows the effect of compounds 1 and 2 on macrophage proliferation activity at a concentration of 50. Mu.M.
FIG. 4 is a graph showing the results of compounds 1 and 2 inhibiting LPS-induced RAW264.7 macrophage production of NO.
FIG. 5 shows the results of compounds 1 and 2 inhibiting IL-6, TNF- α, IL-8, IL-1β expression in alveolar lavage fluid from LPS-induced acute pneumonitis mice.
Fig. 6 is a diagram of lung tissue pathology.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the present invention, but are merely illustrative of the present invention. The experimental methods used in the following examples are not specifically described, but the experimental methods in which specific conditions are not specified in the examples are generally carried out under conventional conditions, and the materials, reagents, etc. used in the following examples are commercially available unless otherwise specified.
Example 1: compound 1,2 vs SARS-CoV-2 3CL pro Protease in vitro enzyme activity inhibition assay
1.1 Experimental drugs and reagents
Monomer compound: compound 1 (rel- (1 s,2 r) -1- (3, 4-dimethoxyphenyl) -2-methyl-3-oxobutyl-3, 4-dimethoxybenzoate), compound 2 (rel- (1 s,2 s) -1- (3, 4-dimethoxyphenyl) -2-methyl-3-oxobutyl-3, 4-dimethoxybenzoate) (all from conventional isolation methods); GC376 (shanghai source leaf biotechnology limited); 3CL pro Proteases (su state offshore protein technologies, inc.); the polypeptide substrate Dabcyl-KTSAVLQSGFRKME-Edans (Jier Biochemical Co., shanghai).
1.2 Main experiment instrument
FlexStation 3 multifunctional enzyme labelling instrument.
1.3 Experimental methods
Evaluation of 2 Compounds against SARS-CoV-2 3CL Using fluorescence resonance energy transfer method pro Inhibition of protease activity.
1.4 Experimental procedure
(1) The reaction system was 102.5. Mu.L, to which 3CL was added pro Protein (12.5. Mu.g/mL), polypeptide substrate Dabcyl-KTSAVLQSGFRKME-Edans (3 mM), test compound (8. Mu.M), GC376 (8. Mu.M) as positive control, buffer TRIS-HCl (20 mM, pH 7.0), 3 replicates per group, incubation at 25℃for 10min.
(2) Fluorescence intensity was measured using a fluorescence microplate reader at 340nm excitation wavelength and 490nm emission wavelength.
The enzyme activity was calculated according to the following formula:
a is the inhibition rate of small molecules to enzymes, df is a dilution factor, deltaOD is the absorbance change rate, C is the final concentration of protein, vs is the total volume of solution, test is the group added with the tested compound, and control is the blank group.
1.5 detection results
As shown in FIG. 1, compounds 1 and 2 vs. 3CL were identified by a preliminary in vitro enzyme activity screen pro The protease has better inhibition activity, and the inhibition rate at 8 mu M is 55.13 +/-2.45% and 52.78 +/-1.39% respectively.
1.6 Compounds 1 and 2 IC inhibiting SARS-CoV-2 3CLpro enzymatic Activity 50 Detection of
1.6.1 Experimental procedure
(1) The reaction system was 102.5. Mu.L, to which 3CL was added pro Protein (12.5. Mu.g/mL), polypeptide substrate Dabcyl-KTSAVLQSGFRKME-Edans (3 mM), test compound were diluted equally to 1. Mu.M, 2. Mu.M, 4. Mu.M, 8. Mu.M, 16. Mu.M, buffer TRIS-HCl (20 mM, pH 7.0) and incubated at 25℃for 10min.
(2) Fluorescence intensity was measured using a fluorescence microplate reader at 340nm excitation wavelength and 490nm emission wavelength. The enzyme activity was calculated according to the following formula:
a is the inhibition rate of small molecules to enzymes, df is a dilution factor, deltaOD is the absorbance change rate, C is the final concentration of protein, vs is the total volume of solution, test is the group added with the tested compound, and control is the blank group. Final mapping and fitting IC 50 。
1.6.2 detection results
As shown in FIG. 2, SARS-CoV-2-3 CL was performed on different concentrations of Compounds 1 and 2 pro Protease in-vitro enzyme activity inhibition activity determination to obtain compounds 1 and 2 for inhibiting 3CL pro IC of protease 50 The values were 4.88.+ -. 0.6. Mu.M, 4.75.+ -. 0.34. Mu.M, respectively, indicating that Compounds 1 and 2 are SARS-CoV-2 3CL pro The protease has better inhibition effect.
Example 2: inhibiting LPS-induced macrophage from secreting NO function
1. Material
Compound (1, 2); mouse RAW264.7 macrophages (purchased from beijing cove medical college cell bank); endotoxin (LPS, 1. Mu.g/mL; sigma Aldrich (Shanghai) trade Co., ltd.); dexamethasone (Dex, 50. Mu.M; shanghai derived leaf Biotechnology Co., ltd.); CCK8 detection kit (bi yun tian); NO detection kit (Biyun Tian).
2. Main instrument
Fluorescent enzyme mark instrument (Tecan Spark)
3. Method of
3.1 determination of macrophage proliferation Rate
(1) Taking RAW264.7 cells in exponential growth phase at 2×10 6 Cell/well density was seeded in 96-well plates, incubated in a 37℃cell incubator for 24h, the supernatant was discarded, 200. Mu.L of Compound 1 or 2 (50 uM) was added for 24h, 3 wells per sample, and 3 experiments were repeated. Cell viability was calculated by measuring absorbance at 540nm using a fluorescence microplate reader according to the CCK8 kit instructions.
(2) Statistical method
Data are expressed as mean ± standard deviation. Statistical analysis was performed using GraphPad Prism 8.0 software and data was analyzed using one-way analysis of variance (ANOVA). Comparison to Control group: # P<0.05, ## P<0.01; comparison with the Model group: * P<0.05, ** P<0.01。
(3) Results
As shown in fig. 3, compounds 1 and 2 did not affect macrophage proliferation activity at 50 μm concentration.
3.2 Compounds 1 and 2 inhibit LPS-induced RAW264.7 macrophage NO production assay
(1) Taking RAW264.7 cells in exponential growth phase at 2×10 6 The density of cells/well is inoculated in a 96-well plate, the 96-well plate is placed in a cell culture box at 37 ℃ for culturing for 5 hours, after the cells are attached, 200 mu L of compound 1 or 2 or Dex is added into the culture medium for incubation for 1 hour, then LPS (final concentration of 1 mu g/mL) is added into the culture medium, the culture is continued for 24 hours, 3 multiple wells are formed in each sample, and 3 experiments are repeated. According to the instruction of NO detection kit (Biyun Tian), the absorbance at 540nm of each well is measured by using a fluorescence microplate reader according to the followingThe concentration of NO in the supernatant per well was calculated by standard curve.
(2) Statistical method
Data are expressed as mean ± standard deviation. Statistical analysis was performed using GraphPad Prism 8.0 software and data was analyzed using one-way analysis of variance (ANOVA). Comparison to Control group: # P<0.05, ## P<0.01; comparison with the Model group: * P<0.05, ** P<0.01。
(3) Results
As shown in fig. 4, compounds 1 and 2 significantly inhibited NO production at 50 μm concentrations (P < 0.05).
Example 3: effects of Compounds 1 and 2 on LPS-induced acute pneumonia
1. Material
Compounds 1, 2; male BALB/c mice (18-22 g, SPF grade) were purchased from Peking Vitrelliw laboratory animal technologies Co., ltd., certification No. SCXK (Beijing) 2021-0006; LPS; dex; IL-6 detection kit (Biolegend); IL-8 detection kit (Shenzhen Xinbo biotechnology Co., ltd.); IL-1 detection kit (Thermo Fisher Scientific); TNF-assay kit (Biolegend).
2. Method of
2.1 animals and groups
Male BALB/c mice were randomly divided into 7 groups: normal control, model control, dex (10 mg/kg), compound 1 (10 mg/kg) low dose, compound 1 (20 mg/kg) high dose, compound 2 (10 mg/kg) low dose, compound 2 (20 mg/kg) high dose, 12 per group.
2.2 model creation and administration
The mice in each group were given 3mg/kg LPS by nasal drops except for normal control group experimental animals. Meanwhile, 10mg/kg Dex, 10mg/kg Compound 1, 20mg/kg Compound 1, 10mg/kg Compound 2, 20mg/kg Compound 2 were respectively administered by gavage, and the blank control group and the model control group were given the same dose of 0.5% CMC-Na by gavage.
2.3 sampling and detection
After 8h of administration, the eyeballs are taken for blood collection and sacrifice, lung tissues are rapidly taken, part of the lung tissues are instilled with 0.6mL of precooled PBS solution through an air pipe for lavage three times, the lavage liquid is centrifuged for 10min at 400 Xg (4 ℃), and the supernatant is collected for detecting inflammatory factors. The other part of the lung was fixed in 4% paraformaldehyde for 72h and embedded with an automatic paraffin embedding machine to prepare 4-6 μm sections. The slices are dewaxed by xylene I and xylene II for 5min respectively, then treated by absolute ethanol, 95% ethanol, 80% ethanol and 70% ethanol for 5min in sequence, and finally washed by distilled water to finish the dewaxing-to-water process. Hematoxylin dye solution is used for dyeing for 5min, and tap water is used for washing for 10min. Differentiation liquid is differentiated for 30s, soaked in distilled water for 15min, placed in eosin dye solution for 10s, washed with distilled water for 2min, and each of xylene I and xylene II is devitrified for 2min, and then sealed with neutral gum. The pathological changes of the lung tissue are observed under a microscope and photographed.
2.4 statistical methods
Data are expressed as mean ± standard deviation. Statistical analysis was performed using GraphPad Prism 8.0 software and data was analyzed using one-way analysis of variance (ANOVA). Comparison to Control group: # P<0.05, ## P<0.01; comparison with the Model group: * P<0.05, ** P<0.01。
2.5 results
The invention examines the influence of the compounds 1 and 2 on the lung inflammation of the mice with acute pneumonia by detecting the expression of IL-6, TNF-, IL-8 and IL-1 in the alveolar lavage fluid of each group of mice by using the corresponding kit. As a result, see FIG. 5, compounds 1 and 2 (20 mg/kg) significantly reduced the expression of IL-6, TNF-, IL-8, IL-1 (P < 0.05) in alveolar lavage fluid.
The results of observation of the lung tissue structure of the mice by HE staining are shown in FIG. 6. Consistent with the detection results of inflammatory factors, compounds 1 and 2 (20 mg/kg) can significantly reduce inflammatory exudates between bronchoalveoli, significantly reduce inflammatory cell infiltration, and maintain the integrity of bronchial epithelial cells. It is demonstrated that compounds 1 and 2 significantly improve the pathological lesions caused by inflammatory reactions in the lung. And compared with the hormone medicine Dex, the compounds 1 and 2 are derived from natural products, so that side effects caused by the hormone medicine can be avoided.
Claims (6)
1.7,8-secoisolariciresinol diglucoside for preparing and controlling 3CL pro Use of a protease SARS-CoV-2 virus in the manufacture of a medicament, wherein the 7, 8-split ring lignans are selected from compound 1 and/or compound 2:
。
2. the use according to claim 1, wherein compound 1 and/or compound 2 inhibits 3CL pro Protease in vitro enzymatic activity.
3. The use according to claim 1, wherein the SARS-CoV-2 virus is an original strain or a variant strain.
The application of 4.7,8-secoisolariciresinol diglucoside in preparing a medicament for preventing and treating pneumonia caused by SARS-CoV-2 virus, characterized in that the 7, 8-secoisolariciresinol diglucoside is selected from compound 1 and/or compound 2:
。
5. the use according to claim 4, wherein compound 1 and/or compound 2 inhibits 3CL pro Protease in vitro enzymatic activity.
6. The use according to claim 4, wherein compound 1 and/or compound 2 inhibits macrophage NO secretion and expression of an associated inflammatory factor in the lung, thereby inhibiting an inflammatory response.
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