|Source:||The dried flower buds of Magnolia biondii Pamp.|
|Biological Activity or Inhibitors:||1. Epimagnolin B has anti-inflammatory activity, it can inhibit the production of NO and PGE(2) and the expression of respective enzyme iNOS and COX-2 through the suppression of I-kappaB-alpha degradation and nuclear translocation of p65 subunit of NF-kappaB.
2. Epimagnolin B exhibits antiallergic effects without affecting the viability of bone marrow-derived mast cells.
|Solvent:||Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.|
|Storage:||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.
Need more advice on solubility, usage and handling? Please email to: firstname.lastname@example.org
|After receiving:||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.|
|1 mg||5 mg||10 mg||20 mg||25 mg|
|1 mM||2.4011 mL||12.0057 mL||24.0113 mL||48.0227 mL||60.0283 mL|
|5 mM||0.4802 mL||2.4011 mL||4.8023 mL||9.6045 mL||12.0057 mL|
|10 mM||0.2401 mL||1.2006 mL||2.4011 mL||4.8023 mL||6.0028 mL|
|50 mM||0.048 mL||0.2401 mL||0.4802 mL||0.9605 mL||1.2006 mL|
|100 mM||0.024 mL||0.1201 mL||0.2401 mL||0.4802 mL||0.6003 mL|
Bioorg Med Chem Lett. 2009 Feb 1;19(3):937-40.
|In vitro anti-inflammatory activity of lignans isolated from Magnolia fargesii.[Pubmed: 19110419]|
|The overproduction of nitric oxide (NO) and prostaglandin E(2) (PGE(2)) causes neurodegenerative diseases, such as Alzheimer's disease and Parkinson's disease. Four lignans, (+)-eudesmin (1), (+)-magnolin (2), (+)-yangambin (3) and a new structure named as Epimagnolin B (4) were isolated from Magnolia fargesii (Magnoliaceae) as the inhibitors of NO production in LPS-activated microglia. The most potent compound 4 inhibited the production of NO and PGE(2) and the expression of respective enzyme iNOS and COX-2 through the suppression of I-kappaB-alpha degradation and nuclear translocation of p65 subunit of NF-kappaB.|
Rsc Advances, 2017, 7(54):34236-34243.
|Bioassay-guided isolation of bisepoxylignans from the flower buds of Magnolia biondii Pamp and their antiallergic effects.[Reference: WebLink]|
|The dried flower buds of Magnolia biondii Pamp (herbal name, Xin-Yi) are a traditional Chinese medicine with a long history of clinical use in the treatment of allergic rhinitis and sinusitis. However, the constituents responsible for its antiallergic effects remain unidentified. In the present study, a novel bisepoxylignan, isoeudesmin (1), and eight known bisepoxylignans, pluviatilol (2), eudesmin (3), magnolin (4), lirioresinol-B dimethyl ether (5), Epimagnolin B (6), kobusin (7), aschantin (8), fargesin (9), were isolated from effective fractions through antiallergic bioassay-guided procedures using mouse bone marrow-derived mast cells (BMMCs) and IgE-induced passive cutaneous anaphylaxis mice. The compound structures were elucidated through nuclear magnetic resonance and mass spectrometry analyses. Compound 1 and compounds 2–6 and 9 exhibited antiallergic effects without affecting the viability of BMMCs. Compounds 2 and 9 showed the strongest effects with IC50 values of 52.18 and 93.03 μM, respectively. In this paper, the structure–activity relationship between these bisepoxylignans and their antiallergic effects is discussed. After evaluating the intensity of the antiallergic effects of the extracts, further separating the fractions, and isolating the purified compounds, we concluded that biosepoxylignans are the main constituents in Xin-Yi contributing to its anti-allergic efficacy.|