silibinin

Silybin A is the major active constituent of silymarin, a standardized extract of the milk thistle seeds, containing a mixture of flavonolignans consisting of silibinin, isosilibinin, silicristin, silidianin and others. Silibinin itself is a mixture of two diastereomers, silybin A and silybin B, in approximately equimolar ratio. Both in vitro and animal research suggest that silibinin has hepatoprotective (antihepatotoxic) properties that protect liver cells against toxins. Silibinin has also demonstrated in vitro anti-cancer effects against human prostate adenocarcinoma cells, estrogen-dependent and -independent human breast carcinoma cells, human ectocervical carcinoma cells, human colon cancer cells, and both small and nonsmall human lung carcinoma cells.

Silybin is a flavonoid from Silybum that inhibits P-glycoprotein-assisted extracellular efflux, inhibits cytochrome P450 enzymes, has the advantage of being well-tolerated, can be used as an adjunctive treatment for hepatotoxicity and chronic hepatitis and cirrhosis, and has antioxidant and anti-inflammatory activity in cosmetic applications, as well as being capable of blocking the MCT8 transporter protein.

Silybin B (Silibinin B) is an effective inhibitor of raloxifene 4 '- and 6-glucosalylation, an effective anti-fibrinogenic and anti-oligomeric component of Silymarin, with free radical scavenging activity of 1, 1-diphenyl-2-pyridinyl hydrazine (DPPH), and a protective effect against cisplatin-induced neurotoxicity by alleviating DNA damage and apoptosis. Silybin B can inhibit the growth of human chronic myeloid leukemia K562 cells and induce apoptosis.

(±)-Silybin, a racemate of Silybin, demonstrates a range of biological activities including inducing apoptosis and possessing hepatoprotective, antioxidant, anti-inflammatory, and anti-cancer properties [1] [2].

Silibinin-d3 is the deuterium-labelled compound of silibinin, used for isotope tracing. Silibinin is the primary active component of milk thistle, capable of inhibiting cancer cell proliferation and migration.

Silibinin (Standard) is a reference standard for research and analysis in studies involving Silibinin. Silibinin (Silybin) is the major active constituent of silymarin, a standardized extract of the milk thistle seeds, containing a mixture of flavonolignans consisting of silibinin, isosilibinin, silicristin, silidianin and others. Silibinin itself is a mixture of two diastereomers, silybin A and silybin B, in approximately equimolar ratio. Both in vitro and animal research suggest that silibinin has hepatoprotective (antihepatotoxic) properties that protect liver cells against toxins. Silibinin has also demonstrated in vitro anti-cancer effects against human prostate adenocarcinoma cells, estrogen-dependent and -independent human breast carcinoma cells, human ectocervical carcinoma cells, human colon cancer cells, and both small and nonsmall human lung carcinoma cells.

Isosilybin (Isosilibinin) and Silybin might be suitable candidates to design potent PXR antagonists to prevent drug-drug interactions via CYP3A4 in cancer patients.

Tpl2 kinase inhibitor is an inhibitor of tumor progression locus 2 (Tpl2; IC50= 0.05 μM).1It is selective for Tpl2 over MEK, p38 MAPK, Src, MK2, and PKC (IC50s = >40, 180, >400, 110, and >400 μM, respectively). Tpl2 kinase inhibitor inhibits LPS-induced TNF-α production in isolated human monocytes and whole blood (IC50s = 0.7 and 8.5 μM, respectively). It enhances differentiation induced by calcitriol in HL-60 and U937 leukemia cells when used at a concentration of 5 μM.2Tpl2 kinase inhibitor (5 μM) inhibits the proliferation of KG-1a leukemia cells.3 1.Garvin, L.K., Green, N., Hu, Y., et al.Inhibition of Tpl2 kinase and TNF-α production with 1,7-naphthyridine-3-carbonitriles: Synthesis and structure-activity relationshipsBioor. Med. Chem. Lett.15(23)5288-5292(2005) 2.Wang, X., and Studzinski, G.P.Expression of MAP3 kinase COT1 is up-regulated by 1,25-dihydroxyvitamin D3 in parallel with activated c-jun during differentiation of human myeloid leukemia cellsJ. Steroid. Biochem. Mol. Biol.121(1-2)395-398(2010) 3.Wang, X., Gocek, E., Novik, V., et al.Inhibition of Cot1/Tlp2 oncogene in AML cells reduces ERK5 activation and up-regulates p27Kip1 concomitant with enhancement of differentiation and cell cycle arrest induced by silibinin and 1,25-dihydroxyvitamin D3Cell Cycle9(22)4542-4551(2010)

Antitumor agent-47 is a silibinin derivative with an antitumor activity. Antitumor agent-47 shows cytotoxic activity against NCI-H1299 and HT29 cells with IC 50 values of 8.07 µM and 6.27 µM, respectively .

Silybin B (Standard) is a reference standard for research and analysis in studies involving Silybin B. Silybin B (Silibinin B) is an effective inhibitor of raloxifene 4 '- and 6-glucosalylation, an effective anti-fibrinogenic and anti-oligomeric component of Silymarin, with free radical scavenging activity of 1, 1-diphenyl-2-pyridinyl hydrazine (DPPH), and a protective effect against cisplatin-induced neurotoxicity by alleviating DNA damage and apoptosis. Silybin B can inhibit the growth of human chronic myeloid leukemia K562 cells and induce apoptosis.