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(-)-Epiafzelechin

Catalog No. TN1606 CAS 24808-04-6

(-)-Epiafzelechin exhibits significant anti-inflammatory activity on carrageenin-induced mouse paw edema, it exhibits a dose-dependent inhibition on the COX activity with an IC50 value of 15 microM, it exhibits about 3-fold weaker inhibitory potency on the enzyme activity than indomethacin as a positive control.

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(-)-Epiafzelechin, CAS 24808-04-6

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Purity: 98%

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Description

In vitro

(-)-Epigallocatechin 3-O-gallate (EGCG), which is one of major polyphenols in green tea, showed lipase inhibition with an IC50 of 0.349 microM. Moreover, flavan-3-ol digallate esters, such as (-)-epigallocatechin-3,5-digallate, showed higher activities of inhibition on lipase with an IC50 of 0.098 microM. On the other hand, nonesterified flavan-3-ols, such as (+)-catechin, (-)-epicatechin, (+)-gallocatechin, and (-)-epigallocatechin, showed zero and/or the lowest activities against pancreatic lipase (IC50 > 20 microM). These data suggested that the presence of galloyl moieties within the structure was required for enhancement of pancreatic lipase inhibition. It is well-known that flavan-3-ols are polymerized by polyphenol oxidase and/or heating in a manufacturing process of oolong tea. Oolonghomobisflavans A and B and oolongtheanin 3'-O-gallate, which are typical in oolong tea leaves, showed strong inhibitory activities with IC50 values of 0.048, 0.108, and 0.068 microM, respectively, even higher than that of EGCG. The oolong tea polymerized polyphenols (OTPP) were prepared for the assay from oolong tea extract, from which the preparation effectively subtracted the zero and/or less-active monomeric flavan-3-ols by preparative high-performance liquid chromatography. The weight-average molecular weight (Mw) and number-average molecular-weight (Mn) values of OTPP were 2017 and 903, respectively, by using gel permeation choromatography. OTPP showed a 5-fold stronger inhibition against pancreatic lipase (IC50 = 0.28 microg/mL) by comparison with that of the tannase-treated OTPP (IC50 = 1.38 microg/mL).

Molecular Weight	274.27
Formula	C15H14O5
CAS No.	24808-04-6

Storage

Powder: -20°C for 3 years

In solvent: -80°C for 2 years

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( < 1 mg/ml refers to the product slightly soluble or insoluble )

References and Literature

1. Inhibitory effects of oolong tea polyphenols on pancreatic lipase in vitro.J Agric Food Chem. 2005 Jun 1;53(11):4593-8.

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Keywords

(-)-Epiafzelechin 24808-04-6 Immunology/Inflammation Neuroscience COX ( ) Epiafzelechin ()Epiafzelechin Inhibitor inhibitor inhibit

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