Isokaempferide

CAS# 1592-70-7

Isokaempferide

Catalog No. BCN3790----Order now to get a substantial discount!

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Quality Control of Isokaempferide

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Chemical structure

Isokaempferide

3D structure

Chemical Properties of Isokaempferide

Cas No. 1592-70-7 SDF Download SDF
PubChem ID 5280862 Appearance Yellow powder
Formula C16H12O6 M.Wt 300.3
Type of Compound Flavonoids Storage Desiccate at -20°C
Solubility Soluble in Chloroform,Dichloromethane,Ethyl Acetate,DMSO,Acetone,etc.
Chemical Name 5,7-dihydroxy-2-(4-hydroxyphenyl)-3-methoxychromen-4-one
SMILES COC1=C(OC2=CC(=CC(=C2C1=O)O)O)C3=CC=C(C=C3)O
Standard InChIKey VJJZJBUCDWKPLC-UHFFFAOYSA-N
Standard InChI InChI=1S/C16H12O6/c1-21-16-14(20)13-11(19)6-10(18)7-12(13)22-15(16)8-2-4-9(17)5-3-8/h2-7,17-19H,1H3
General tips For obtaining a higher solubility , please warm the tube at 37 ℃ and shake it in the ultrasonic bath for a while.Stock solution can be stored below -20℃ for several months.
We recommend that you prepare and use the solution on the same day. However, if the test schedule requires, the stock solutions can be prepared in advance, and the stock solution must be sealed and stored below -20℃. In general, the stock solution can be kept for several months.
Before use, we recommend that you leave the vial at room temperature for at least an hour before opening it.
About Packaging 1. The packaging of the product may be reversed during transportation, cause the high purity compounds to adhere to the neck or cap of the vial.Take the vail out of its packaging and shake gently until the compounds fall to the bottom of the vial.
2. For liquid products, please centrifuge at 500xg to gather the liquid to the bottom of the vial.
3. Try to avoid loss or contamination during the experiment.
Shipping Condition Packaging according to customer requirements(5mg, 10mg, 20mg and more). Ship via FedEx, DHL, UPS, EMS or other couriers with RT, or blue ice upon request.

Source of Isokaempferide

The herbs of Geranium wilfordii Maxim

Biological Activity of Isokaempferide

Description1. Isokaempferide shows anti-inflammatory effects, the anti-inflammatory effects can be explained, at least in part, by reducing neutrophil degranulation, myeloperoxidase activity, mediators as well as TNF-alpha secretion. 2. Isokaempferide is used as a bronchodilator, can induce relaxation of guinea-pig isolated trachea. 3. The hydroxyflavones (luteolin, apigenin and isokaempferide) exert comparable antiproliferative activities against malignant and normal cells. 4. Isokaempferide shows strong inhibitory effect on TNF-alpha-induced liver cell death with the IC50 value of 22.8 microM, suggests that it has hepatoprotective activity.
TargetsTNF-α | PGE | Calcium Channel | ATPase | Potassium Channel

Isokaempferide Dilution Calculator

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Isokaempferide Molarity Calculator

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Preparing Stock Solutions of Isokaempferide

1 mg 5 mg 10 mg 20 mg 25 mg
1 mM 3.33 mL 16.65 mL 33.3 mL 66.6001 mL 83.2501 mL
5 mM 0.666 mL 3.33 mL 6.66 mL 13.32 mL 16.65 mL
10 mM 0.333 mL 1.665 mL 3.33 mL 6.66 mL 8.325 mL
50 mM 0.0666 mL 0.333 mL 0.666 mL 1.332 mL 1.665 mL
100 mM 0.0333 mL 0.1665 mL 0.333 mL 0.666 mL 0.8325 mL
* Note: If you are in the process of experiment, it's necessary to make the dilution ratios of the samples. The dilution data above is only for reference. Normally, it's can get a better solubility within lower of Concentrations.

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References on Isokaempferide

Hepatoprotective effect of Combretum quadrangulare and its constituents.[Pubmed:10784427]

Biol Pharm Bull. 2000 Apr;23(4):456-60.

The MeOH extract of leaves of Combretum quadrangulare showed significant hepatoprotective effect on D-galactosamine (D-GalN)/lipopolysaccharide (LPS)-induced experimental liver injury in mice and on D-GalN/tumor necrosis factor-alpha (TNF-alpha)-induced cell death in primary cultured mouse hepatocytes. Phytochemical investigation led to the isolation of thirty cycloartane-type triterpenes together with betulinic acid, beta-sitosterol, beta-sitosterol glucoside, 4 flavones (34-37), and 3 flavone C-glucosides (38-40). These compounds showed various potencies of hepatoprotective effect on D-GalN/TNF-alpha-induced cell death in primary cultured mouse hepatocytes. Quadrangularol B (29), methyl quadrangularate I (33), kamatakenin (34), 5,7,4'-trihydroxy-3,3'-dimethoxyflavone (35), 5,4'-dihydroxy-3,7,3'-trimethoxyflavone (36) and Isokaempferide (37) showed strong inhibitory effect on TNF-alpha-induced cell death with IC50 values of 34.3, 33.7, 13.3, 22.4, 13.4 and 22.8 microM, respectively, whereas clinically-used silibinin had an IC50 value of 39.6 microM and glycyrrhizin showed very weak inhibitory effect. Methyl quadrangularates A (30) and N (32), norquadrangularic acid B (31) and vitexin (40) also showed potent inhibition on TNF-alpha-induced cell death with IC50 values of 45.7, 89.3, 67.6 and 40.1 microM, respectively. The flavonoids and some of the cycloartane-type triterpenes appeared to be the hepatoprotective principles of the leaves of C. quadrangulare.

Mechanisms underlying the relaxation induced by isokaempferide from Amburana cearensis in the guinea-pig isolated trachea.[Pubmed:16455108]

Life Sci. 2006 May 30;79(1):98-104.

The present study examines possible mechanisms by which the flavonoid Isokaempferide (IKPF; 5,7,4'-trihydroxy-3-methoxyflavone) from Amburana cearensis, a Brazilian medicinal plant popularly used as bronchodilator, induces relaxation of guinea-pig isolated trachea. In the trachea (with intact epithelium) contracted by carbachol, IKPF (1-1000 microM) caused a graded relaxation, and the epithelium removal increased the sensitivity of the airway smooth muscle to IKPF (EC50, in intact tissue: 77.4 [54.8-109.2] microM; in denuded epithelium: 15.0 [11.3-20.1] microM). The IKPF-induced relaxation was inhibited in 41% by the nitric oxide (NO) synthase inhibitor L-NAME (100 microM); in 31% and 50% by the soluble guanylate cyclase (sGC) inhibitor ODQ (3 and 33 microM); by propranolol (31%) and also by capsaicin (37%). In the trachea pre-contracted by 40 mM KCl the pre-incubation with glibenclamide (33 microM) or iberiotoxin (IbTX, 0.1 microM), selective K(+) channel inhibitors, inhibited the IKPF-induced relaxation by 39% and 38%, respectively. On the other hand, 4-aminopyridine (100 microM), a nonselective K(+) channel antagonist, did not significantly influence the effect of IKPF, while IbTX induced a rightward displacement of the IKPF concentration-response curve. However, in muscle pre-contracted with 120 mM KCl the relaxant effect of IKPF was significantly reduced and not affected by glibenclamide. In conclusion, these results indicate a direct and epithelium-independent relaxant effect of IKPF on smooth muscle fibers. Although this IKPF relaxant action seems to be multi-mediated, it occurs via both Ca(2+) and ATP-sensitive K(+) channels, but some other possible mechanisms unrelated to K(+) channels cannot be excluded.

Effects of amburoside A and isokaempferide, polyphenols from Amburana cearensis, on rodent inflammatory processes and myeloperoxidase activity in human neutrophils.[Pubmed:19053991]

Basic Clin Pharmacol Toxicol. 2009 Mar;104(3):198-205.

The present study evaluated the anti-inflammatory activity of amburoside A (a phenol glucoside) and Isokaempferide (a flavonol) isolated from the trunk bark of Amburana cearensis, a medicinal plant used in northeast Brazil for the treatment of asthma. Animals (male Wistar rats or Swiss mice) pre-treated with amburoside A (25 and 50 mg/kg) or Isokaempferide (12.5, 25 and 50 mg/kg), orally or intraperitoneally, showed a significant inhibition of the paw oedema induced by carrageenan (1%), prostaglandin E(2) (30 nmol/paw), histamine (200 microg/paw) or serotonin (200 microg/paw). Histological and morphometric evaluations of the rat paw oedema induced by carrageenan showed that amburoside A and Isokaempferide also inhibited the accumulation of inflammatory cells. Amburoside A reduced significantly the paw oedema and the increase in vascular permeability induced by dextran, as related to the control group. Similar results were observed with the Isokaempferide pre-treatment. Furthermore, amburoside A or Isokaempferide inhibited both leucocyte and neutrophil migrations, in mouse peritoneal cavity, after the carrageenan injection. The polyphenols were not cytotoxic and blocked N-formyl-methyl-leucyl-phenylalanine-induced myeloperoxidase release and activity in human neutrophils. In addition, amburoside A and Isokaempferide at 50 and 100 microg/ml concentrations reduced significantly the lipopolysaccharide-mediated increase in tumour necrosis factor-alpha (TNF-alpha) levels. These results provide, for the first time, evidence to support the anti-inflammatory activity of amburoside A and Isokaempferide that seems to be related to an inhibition of inflammatory mediators, such as TNF-alpha, as well as histamine, serotonin and prostaglandin E(2), besides leucocyte infiltration in a dose- or concentration-dependent manner. These anti-inflammatory effects can be explained, at least in part, by the ability of these compounds to reduce neutrophil degranulation, myeloperoxidase activity, mediators as well as TNF-alpha secretion.

Antiproliferative activity of flavonoids: influence of the sequential methoxylation state of the flavonoid structure.[Pubmed:22184071]

Phytother Res. 2012 Jul;26(7):1023-8.

Dracocephalum kotschyi Boiss. has been used as part of an ethnobotanical remedy against many forms of human cancer in Iran. It has been demonstrated that a flavonoid named xanthomicrol from D. kotschyi contributes to its preferential antiproliferative activity against malignant cells. In the present study, the antiproliferative activity of its flavonoid fraction was further characterized. Using liquid-liquid extraction and a semi-preparative reversed-phase HPLC method, eight flavonoid aglycones were isolated from the aerial parts of the plant and their identities were confirmed through MS and NMR analyses as luteolin, naringenin, apigenin, Isokaempferide, cirsimaritin, penduletin, xanthomicrol and calycopterin. The in vitro antiproliferative activity of each compound was evaluated against a panel of established normal and malignant cell lines using the MTT assay and some structure-activity relationships were observed. The hydroxyflavones (luteolin, apigenin and Isokaempferide) exerted comparable antiproliferative activities against malignant and normal cells, while the methoxylated hydroxyflavones (cirsimaritin, penduletin, xanthomicrol and calycopterin) showed preferential activities against tumor cells. This activity may be of value in treating tumors as it would exert few side effects in normal tissues. Xanthomicrol selectively inhibited the growth of human gastric adenocarcinoma, while calycopterin selectively prevented human acute promyelocytic leukemia and human colon carcinoma cells proliferation.

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