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Fitoterapia.2015 Jan;100:179-86.Viruses. 2017 Oct 3;9(10). J Biol Chem.2014 Jan 17.J. of Food Composition & Analysis2017Plant Methods. 2017 Dec 6;
Research on Crops.Jun 2017;Food Research InternationalApr. 2018;J Agric Food Chem. 2017 Apr 5Invest New Drugs. 2017 Apr;Chemistry of Natural CompoundsJan. 2018;
J. Acta Agr. Scandinavica17 Apr 2017Cell11 Jan. 2018;Molecules. 2017 Feb 21;Sci Rep. 2017 Jun 12;
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||(+)-R-Coclaurine and (+)-S-reticuline show negative inotropic effects, coclaurine derivatives and of paeoniflorin derivatives have neuromuscular blocking actions. D-Coclaurine has a neuroleptic-like property in blocking effects of dopaminergic stimulating agents. |
|Jpn J Pharmacol. 1989 May;50(1):75-8. |
|Inotropic effects of (+/-)-higenamine and its chemically related components, (+)-R-coclaurine and (+)-S-reticuline, contained in the traditional sino-Japanese medicines [Pubmed: 2724702]|
|(+/-)-Higenamine (Hig. demethylCoclaurine) is a cardiotonic principle from aconite root. (+)-R-Coclaurine (Coc) and (+)-S-reticuline (Ret) are compounds contained in the dried buds of Magnolia salicifolia MAXIM.
METHODS AND RESULTS:
All of these alkaloids possess a common chemical structure: tetrahydroisoquinoline. Coc and Ret showed negative inotropic effects in contrast to the positive inotropic effects of Hig in papillary muscles of guinea pigs. Coc and Ret shifted to the right the concentration-contraction curves of Hig. Hig shifted in parallel to the left the Ca2+ curve, and it tended to shift to the left the isoproterenol (Isp)-induced response curve. In contrast, Coc and Ret inhibited the Ca2+ curve and the low concentration range of the Isp-induced curve, and it potentiated the high concentration ranges of Ca2+ and Isp.
Coc and Ret showed actions that were reversed in direction to those of Hig, as clearly demonstrated in the Ca2+ curve.
|Planta Med. 1982 Jul;45(3):136. |
|The neuromuscular blocking actions of coclaurine derivatives and of paeoniflorin derivatives.[Pubmed: 17396817 ]|
METHODS AND RESULTS:
The neuromuscular blocking actions of Coclaurine derivatives and of paeoniflorin derivatives.
|J Pharmacobiodyn. 1983 Oct;6(10):793-6. |
|Effects of d-coclaurine and d-reticuline, benzyltetrahydroisoquinoline alkaloids, on levels of 3,4-dihydroxyphenylacetic acid and homovanillic acid in the mouse striatum.[Pubmed: 6141236]|
METHODS AND RESULTS:
An intracerebroventricular injection of d-Coclaurine (50 micrograms), a benzyltetrahydroisoquinoline alkaloid extracted from Magnolia salicifolia, produced a slight increase in 3,4-dihydroxyphenylacetic acid level and a significant increase in homovanillic acid level in the mouse striatum. Another alkaloid d-reticuline (200 micrograms) increased only homovanillic acid level. An intracerebroventricular pretreatment with d-Coclaurine (50 micrograms) did not antagonize suppressive effect of apomorphine on l-dopa formation produced by gamma-butyrolactone (750 mg/kg i.p.) plus aromatic amino acid decarboxylase inhibitor, NSD-1015 (100 mg/kg i.p.).
These results suggest that d-Coclaurine blocks postsynaptic but not presynaptic dopamine receptors in the mouse striatum.
||The roots of Coptis chinensis Franch
||Chloroform, Dichloromethane, Ethyl Acetate, DMSO, Acetone, etc.
||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
||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.
Recent ChemFaces New Products and Compounds
Recently, ChemFaces products have been cited in many studies from excellent and top scientific journals
Cell. 2018 Jan 11;172(1-2):249-261.e12. doi: 10.1016/j.cell.2017.12.019.PMID: 29328914
Mol Cell. 2017 Nov 16;68(4):673-685.e6. doi: 10.1016/j.molcel.2017.10.022.PMID: 29149595
Scientific Reports 2017 Dec 11;7(1):17332.doi: 10.1038/s41598-017-17427-6.PMID: 29230013
Molecules. 2017 Oct 27;22(11). pii: E1829.doi: 10.3390/molecules22111829.PMID: 29077044
J Cell Biochem. 2018 Feb;119(2):2231-2239.doi: 10.1002/jcb.26385. PMID: 28857247
Phytomedicine. 2018 Feb 1;40:37-47. doi:10.1016/j.phymed.2017.12.030PMID: 29496173
Calculate Dilution Ratios(Only for Reference)
* Note: If you are in the process of experiment, it's need to make the dilution ratios of the samples. The dilution data of the sheet for your reference. Normally, it's can get a better solubility within lower of Concentrations.
|Phytochemistry. 2001 Apr;56(7):649-55. |
|Purification and characterization of coclaurine N-methyltransferase from cultured Coptis japonica cells.[Pubmed: 11314949]|
METHODS AND RESULTS:
S-Adenosyl-L-methionine (SAM): Coclaurine N-methyltransferase (CNMT), which catalyzes the transfer of a methyl group from S-adenosyl-L-methionine to the amino group of the tetrahydrobenzylisoquinoline alkaloid Coclaurine. was purified 340-fold from Coptis japonica cells in 1% yield to give an almost homogeneous protein.
The purified enzyme, which occurred as a homotetramer with a native Mr of 160 kDa (gel-filtration chromatography) and a subunit Mr of 45 kDa (SDS-polyacrylamide gel electrophoresis), had an optimum pH of 7.0 and a pI of 4.2.
Whereas (R)-Coclaurine was the best substrate for enzyme activity, Coptis CNMT had broad substrate specificity and no stereospecificity CNMT methylated norlaudanosoline, 6,7-dimethoxyl-1,2,3,4-tetrahydroisoquinoline and 1-methyl-6,7-dihydroxy-1,2,3,4-tetrahydroisoquinoline.