Background technology
Dengue virus (dengue virus) belongs to flaviviridae, Flavivirus in classification.Including 4 different serotypes,
I.e. I, II, III, IV type dengue virus.It is different according to disease severity, can clinically be divided into dengue fever (dengue fever),
Dengue hemorrhagic fever (dengue hemorrhagic fever) and dengue shock syndrome (dengue shock syndrome).
Dengue fever spread speed is fast, and the incidence of disease is high, and dengue hemorrhagic fever and the dengue shock syndrome state of an illness are violent, and case fatality rate is high.With complete
Ball warp the Ji quickening of integrated degree and persistently warming for weather, add the quickening of mosquito matchmaker diffusion velocity, distribution and become wide, cause
The disease worldwide spreads rapidly.Dengue fever has become international financial burden, every year about 500,000 dengue fever
Patient with severe symptoms needs hospitalization, about 2.5% death rate.
Although global first dengue vaccine is granted in three countries, the effect of this vaccine is also not very especially desirable, its drop
Low people suffer from dengue fever disease probability only reached 60% level, and the child of less than 9 years old is not in the scope of application.
Therefore, preventing and treating dengue virus infection has turned into the medical field task of top priority with propagation.Because the mechanism of causing a disease of dengue virus is not explained
It is bright, the vaccine and effective medicine for human body are there is no, find a kind of medicine of effective treatment dengue fever extremely urgent.
Cyanidenon, belongs to flavone compound, wooden yellow needles, 328-330 DEG C of fusing point.Water is slightly soluble in, has weak acid
Property, dissolve in alkaline solution, stablize under normal condition.Density:1.654g/cm3, fusing point:330 DEG C, boiling point:616.1℃
At760mmHg, flash-point:239.5℃.Vapour pressure:9.03E-16mmHg at 25℃.
Shown in the chemical constitution of cyanidenon such as following formula (I).
Cyanidenon, leaf initial from Resedaceae Reseda herbaceous plant reseda (ResedaodorataL.),
Isolate and gain the name in stem, branch, can be isolated from various crude drugs, vegetables fruit.Have now been found that and be primarily present in gold
In the crude drug such as honeysuckle flower, chrysanthemum, schizonepeta, ajuga decumbens, arithoke, Perilla, Scutellaria, callicarpa nudiflora, and Brussels sprouts,
In the vegetables fruit such as cabbage, cauliflower, beet, cabbage, carrot, celery, pimento, capsicum, peanut.With antitumor, anti-
Inflammation, antiallergy, anti-fibrosis, antifertility and immunological regulation etc. are acted on.But, do not occur reseda also in current document report
Report of the element with anti-dengue virus activity.
The content of the invention
The technical problem to be solved in the present invention is to provide the new application of cyanidenon, i.e., the new opplication in pharmacy.
The above-mentioned new opplication in pharmacy is, application of the cyanidenon in the medicine for preparing preventing and treating dengue virus infection.
In above-mentioned application, described dengue virus is dengue fever I, II, III or IV type virus.
In above-mentioned application, described cyanidenon can be using conventional method from extracted form natural plant, it is also possible to by closing
Into or other method be obtained.
In above-mentioned application, described medicine is made up of cyanidenon and medically acceptable auxiliary material, wherein, cyanidenon
Weight/mass percentage composition in medicine is 0.1%~90%.
In above-mentioned application, described medicine can be clinically acceptable injection, capsule or tablet.
Injection of the present invention, capsule and tablet have the effect of anti-dengue virus, can be used to prevent and treat dengue fever
Infection.
Present invention cyanidenon anti-dengue virus are to determine cyanidenon to dengue fever using virus plaque titre method
Ith, the inhibitory action of II, III, IV type virus, observation cyanidenon to the toxic action of Huh-7 cells and to dengue fever I, II,
IIIth, the inhibitory action of IV type virus, utilizesDetection reagent measures the poisonous concentration of half of test medicine
(CC50) be 45.89, be respectively 7.2 to the ceiling effect concentration (EC50) of the type dengue fever virus of half I, II, III, IV, 5.19,
5.40th, 8.38, its selection index SI is respectively 6.38,8.84,8.07,5.48, is efficient low toxicity.
Present invention cyanidenon anti-dengue virus additionally use AG129 mouse animal experiments and determine cyanidenon to stepping on
The inhibitory action of hot II type virus is removed from office, observation cyanidenon is to the AG129 death prevention rates by the virus infection of the type of dengue fever II
Effect, its Death prevention rate is 33.33%.
1. experiment material
1.1 cell lines
Human liver cancer cell (Huh-7), is purchased from American Type Culture collection warehousing (ATCC), T5 generations.By Duke-NUS
Medical School freeze conservation.
Newborn hamster kidney cell (BHK-21), is purchased from American Type Culture collection warehousing (ATCC), T6 generations.By Duke-NUS
Medical School freeze conservation.
1.2 experimental groups and its corresponding test medicine
Given the test agent:Take and be purchased from Baoji time bio tech ltd (Lot:0151024) cyanidenon, adds
DMSO, it is the storing solution of 20mM that concentration is obtained.NITD008 as positive control, by Novartis of Singapore tropical disease research center
(Novartis Institute for Tropical Disease, Singapore) is presented, and is made the deposit that concentration is 20mM
Liquid.
1.3 Strain
DENV-1(EDEN-1,GenBank accession EU081230)
DENV-2(EDEN-2,GenBank accession EU081177)
DENV-3(EDEN-3,GenBank accession EU081190)
DENV-4(EDEN-4,GenBank accession GQ398256)
From Nanyang Technological University professor Luo great Hai present, DENV plants leads in the amplification of C6/36 cells, supernatant
- 80 DEG C are stored in after crossing 0.45 μm of filtering with microporous membrane.Virus titer is by plaque assay in BHK-21 raji cell assay Rajis.
1.4 animals
Sv/129 mouse lack I and II types interferon receptors (AG129), are purchased from B&K Universal (UK) company.It is all
Singapore National guidelines (protocol 2012/SHS/713) are observed in zoopery, by
Institutional Animal Care and Use Committee at Singapore Health Services are criticized
It is accurate.All experiments are carried out in Duke-NUS BSL-2 grades of laboratory.
1.5 reagents and instrument newborn calf serum and DMEM culture mediums (Gibco companies);DMSO (Sigma companies);Pancreas
Protease (DIFCO companies of the U.S.).Olympus PM-6 inverted microscopes (Japanese OLYMPUS companies).
2. method
The measure of 2.1 cyanidenons toxic concentration on Huh-7 cells
By the Huh-7 of growth digests counting with EDTA- pancreatin in flakes in cell bottle, with 2 × 104The inoculation of/100 μ l/ holes is thin
Born of the same parents' (white flat bottom) in 96 orifice plates, 37 DEG C of 5%CO2Overnight incubation.By medicine cell growth nutrient solution (containing 10% serum)
By 50,25,12.5,6.25,3.125,1,0.1,0.01 μM of dilutions of final concentration.Culture medium is sucked, drug solution 100 is added per hole
μ l, if normal cell controls, 100 μ l cell growth nutrient solutions are added per hole.In 37 DEG C of 5%CO2Culture 48h.Will
CellTiter-GloBuffer is added in CellTiter-Glo Substrate, forms the mixture of enzyme and substrate, i.e.,
CellTiter-Glo reagents.The CellTiter-Glo reagents of isometric (100 μ l) are added per hole, 10 points are incubated at room temperature
Clock, reads Luminescence numerical value under ELIASA (Tecan Infinite 200PRO).
Cell survival rate=medicine group Luminescence/ normal group Luminescence × 100%
The measure of 2.2 antiviral effect in vitro
By the Huh-7 of growth digests counting with EDTA- pancreatin in flakes in cell bottle, with 1 × 105The inoculation of/500 μ l/ holes is thin
Born of the same parents are in 24 orifice plates.37 DEG C of 5%CO2Overnight incubation.Medicine is pressed into final concentration with cell growth nutrient solution (containing 10% serum)
50,25,12.5,6.25,3.125,1,0.1,0.01 μM of dilutions.EDEN-1, EDEN-2, EDEN-3 and EDEN-4 virus liquid is not with
Culture medium containing serum is diluted by infection multiplicity (multiplicity of infection) MOI=0.3.Culture medium is sucked, often
Hole adds drug solution and each 100 μ l of virus liquid, in 37 DEG C of 5%CO2 cultures 1h.Virus-medicinal mixture is sucked, is added per hole
Enter 400 μ l pastille culture mediums, in 37 DEG C of 5%CO2 cultures 48h.Supernatant is collected, 9000rpm is centrifuged 3 minutes to remove cell
Fragment.Be stored in -80 DEG C it is standby.Virus titer is determined by plaque assays.
The measure of 2.3 virus titers
By the BHK-21 of growth digests counting with EDTA- pancreatin in flakes in cell bottle, with 2 × 105The inoculation of/500 μ l/ holes is thin
Born of the same parents are in 24 orifice plates.37 DEG C of 5%CO2Overnight incubation.Virus Sample is diluted with the culture medium without serum, two dilutions are set
Multiple, each extension rate sets two multiple holes, extension rate:10-2-10-7.Culture medium is sucked, 200 μ l virus liquids is added per hole,
In 37 DEG C of 5%CO2 cultures 1h.Inoculum is removed, 0.8%CMC, 37 DEG C 5%COs of the 500 μ l containing 2% serum are added per hole2Culture
4-5 days (EDEN-2, EDEN-3, EDEN-4 are cultivated 5 days, and EDEN-1 is cultivated 4 days).Fixed with 3.7% paraformaldehyde, 1% crystallization
Purple dyeing, counts plaque.The inverse of Pfu/ml=plaques number × 1000/200 × dilution gfactor.
The measure of 2.4 interior resisting virus effect
Take the mouse of 7-11 weeks, the 4G2 antibody of infection the previous day intraperitoneal injection 50 μ g.1 × 10 is injected intravenously respectively8pfu
EDEN-1, EDEN-2, EDEN-3, EDEN-4 virus make infection, the subsequent 4 days cyanidenons to mouse stomach 100mg/kg,
Four times per day, by 4/4/4/12h (9AM, 1PM, 5PM and 9PM) cycle administration.Mouse survival situation is observed the tenth day.Often
Group sets 6 mouse.
3. result
3.1 drug toxicity results see the table below 1.
Evaluation of the cyanidenon of table 1 to Huh-7 cytotoxicities
Drawn using software GraphPad Prism5.0, as a result as shown in Figure 1.
The measurement result of 3.2 Antiviral Effects effect see the table below 2.
The measure of the virus titer of table 2
Drawn using software GraphPad Prism5.0, as a result as shown in Figure 2.
Dead protective effect of 3.3 cyanidenons to AG129 mouse is shown in Table 3- tables 6
Time-to-live of the cyanidenon of table 3 to EDEN-1 virus infection AG129 mouse
Time-to-live of the cyanidenon of table 4 to EDEN-2 virus infection AG129 mouse
Time-to-live of the cyanidenon of table 5 to EDEN-3 virus infection AG129 mouse
Time-to-live of the cyanidenon of table 6 to EDEN-4 virus infection AG129 mouse
Drawn using software GraphPad Prism5.0, as a result as shown in figures 3 to 6.