meso-Hannokinol
meso-Hannokinol and (+)-hannokinol can significantly inhibit lipopolysaccharide-induced nitric oxide production in BV2 microglial cells at concentrations ranging from 1 uM to 100 uM.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
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The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
Front Pharmacol.2019, 10:1025
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Nutrients.2019, 11(6):E1380
Food Sci Biotechnol.2023, 32(7):997-1003.
Biochem Biophys Res Commun.2017, 482(4):1095-1101
Industrial Crops and Products2022, 188:115638
Biomed Pharmacother.2021, 139:111585.
J.Food Processing & Preservation2022, jfpp.16666
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Planta Med. 2008 Jun;74(8):867-9.
Inhibitory constituents of lipopolysaccharide-induced nitric oxide production in BV2 microglia isolated from Amomum tsao-ko.[Pubmed:
18523923]
A methanolic extract of the fruits of AMOMUM TSAO-KO (Zingiberaceae) significantly attenuated nitric oxide production in lipopolysaccharide-simulated BV2 microglia.
METHODS AND RESULTS:
Two new bicyclic nonanes characterized as 6,7-dihydroxy-indan-4-carbaldehyde ( 1) and 6-hydroxy-indan-4-carbaldehyde ( 2) were isolated with the eleven known compounds 6,7-dihydroxy-3,7-dimethyloct-2-enoic acid ( 3), tsaokoin ( 4), isotsaokoin ( 5), 8-oxogeraniol ( 6), P-menth-1-ene-5,6-diol ( 7), 3alpha-hydroxycarvotagenone ( 8), tsaokoarylone ( 9), 1,7-bis(4-hydroxy-3-methoxyphenyl)-4,6-heptadien-3one ( 10), (+)-hannokinol ( 11), meso-Hannokinol ( 12) and hannokinin ( 13), from the fruits of A. TSAO-KO using bioactivity-guided fractionation.
CONCLUSIONS:
All thirteen compounds significantly inhibited lipopolysaccharide-induced nitric oxide production in BV2 microglial cells at concentrations ranging from 1 microM to 100 microM.
Food Funct. 2014 Aug;5(8):1747-54.
Bioactivity evaluation of ingredients identified from the fruits of Amomum tsaoko Crevost et Lemaire, a Chinese spice.[Pubmed:
24915829]
METHODS AND RESULTS:
In this work, a phytochemical investigation was conducted on Amomum tsaoko Crevost et Lemaire, a traditional Chinese spice. Based on spectroscopic methods including MS, (1)H-NMR, (13)C-NMR, DEPT135 and HMQC spectroscopy, eight main chemical compositions, sitosterol, daucosterol, meso-Hannokinol, quercetin, epicatechin, quercetin-7-O-β-glucoside, quercetin-3-O-β-glucoside, and catechol, were isolated and identified from A. tsaoko, among which quercetin, quercetin-7-O-β-glucoside and quercetin-3-O-β-glucoside were first found in A. tsaoko.
CONCLUSIONS:
Their bioactivities were evaluated by the inhibitory effect on NO production in LPS-stimulated macrophage RAW 264.7 cells, the protective effect on H2O2-induced apoptosis of PC-12 cells and the DPPH radical scavenging assay.
