Timosaponin B II - CAS 136656-07-0
Catalog number: B0005-464363
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Timosaponin BII is extracted from the rhizomes of Anemarrhena asphodeloides Bunge. It has antioxidant, potential anti-dementia activity. It remarkably inhibited the up-regulation of BACE1 and reduced the over-production of β-CTF and Aβ in rat retina.
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B0005-464363 20mg $268 In stock
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(25S)-26-(β-D-Glucopyranosyloxy)-3β-[(2-O-β-D-glucopyranosyl-β-D-galactopyranosyl)oxy]-5β-furostan-22-ol; (25S)-3β-[(2-O-β-D-Glucopyranosyl-β-D-galactopyranosyl)oxy]-26-(β-D-glucopyranosyloxy)-5β-furostane-22-ol
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1.Effect of steroidal saponins of Anemarrhenae rhizoma on superoxide generation in human neutrophils.
Zhang J;Zhang M;Sugahara K;Sagara Y;Meng Z;Xu S;Kodama H Biochem Biophys Res Commun. 1999 Jun 16;259(3):636-9.
Effect of six steroidal saponins isolated from Anemarrhenae rhizoma on superoxide generation in human neutrophils was investigated. The steroidal saponins examined were anemarrhenasaponin-I (An-I), anemarrhenasaponin-Ia (An-Ia), timosaponin B-I (TB-I), timosaponin B-II (TB-II), timosaponin B-III (TB-III) and timosaponin A-III (TA-III). An-I, An-Ia, and TB-III suppressed the superoxide generations induced by N-formyl-methionyl-leucyl-phenylalanine (fMLP) and arachidonic acid (AA) in a concentration-dependent manner, but enhanced that induced by phorbol 12-myristate 13-acetate (PMA). While TB-II also suppressed and enhanced the superoxide generations induced by fMLP and PMA, respectively, the compound significantly enhanced the AA-induced superoxide generation. TB-I enhanced the fMLP-induced superoxide generation in a low concentration range (peak at 40 microM), gave no effect on the PMA-induced superoxide generation and weakly enhanced the AA-induced superoxide generation. TA-III enhanced the fMLP-induced superoxide generation more than twice as much as that by TB-I in the same concentration range. However, TA-III enhanced the PMA-induced superoxide generation and most significantly suppressed the AA-induced superoxide generation.
2.A novel ultra high-performance liquid chromatography-tandem mass spectrometry method for the simultaneous determination of xanthones and steroidal saponins in crude and salt-processed Anemarrhenae Rhizoma aqueous extracts.
Ji;Su X;Huang Z;Wang Q;Lu T J Sep Sci. 2018 Jun;41(11):2310-2320. doi: 10.1002/jssc.201701408. Epub 2018 Mar 15.
We established a rapid and sensitive ultra high-performance liquid chromatography tandem mass spectrometry method for the simultaneous quantification of xanthones and steroidal saponins in rat plasma. Chromatographic separation was achieved on a C;18; column with a mobile phase comprising acetonitrile and 0.1% formic acid. The detection was performed by negative electrospray ionization in multiple reaction monitoring mode. The validated method showed good linearity within the tested range (r > 0.9945). The intra- and interday precision at high, medium, and low concentrations was less than 7.96%. The bias of accuracies ranged from -1.92 to 9.62%. The extraction recoveries of the compounds ranged from 84.78 to 88.69%, and the matrix effects ranged from 96.76 to 108.59%. This method was successfully applied to a pharmacokinetic comparison of crude and salt-processed Anemarrhenae Rhizoma aqueous extracts after oral administration in rats. The maximum plasma concentration and area under concentration-time curve of timosaponin BIII and timosaponin AIII increased significantly (P < 0.05 or 0.01) and those of timosaponin BII decreased significantly (P < 0.05) after processing. These results could contribute to the clinical application of crude and salt-processed Anemarrhenae Rhizoma and reveal the processing mechanism.
3.Isolation of pseudoprototimosaponin AIII from rhizomes of Anemarrhena asphodeloides and its hypoglycemic activity in streptozotocin-induced diabetic mice.
Nakashima N;Kimura I;Kimura M;Matsuura H J Nat Prod. 1993 Mar;56(3):345-50.
A hot-H2O extract of rhizomes of Anemarrhena asphodeloides, the Japanese sino-medicine "chimo," lowered the blood glucose level in alloxan-diabetic mice. Hypoglycemic activity-guided fractionation isolated a new glycoside, pseudoprototimosaponin AIII [1], which was compared with chemically known prototimosaponin AIII [2]. These compounds exhibited hypoglycemic effects in a dose-dependent manner in streptozotocin-diabetic mice but showed no effects on glucose uptake and insulin release, suggesting that the hypoglycemic mechanism may be due to inhibition of hepatic gluconeogenesis and/or glycogenolysis.
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CAS 136656-07-0 Timosaponin B II

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