withaferin a

Withaferin A 是从南非醉茄中分离到的一种甾体内酯，是内皮蛋白 C 受体脱落抑制剂，可以抑制NF-kB 的活性，具有抗炎，抗肿瘤等作用。它是一种新型 NFkappaB 抑制剂，有望成为治疗各种炎症性疾病和癌症的新型抗炎药。

4-oxo-27-TBDMS Withaferin A is a derivative of the steroidal lactone withaferin A that has anticancer activity.1 It is cytotoxic to A2780 ovarian cancer cells (IC50 = 17 μM) but not to carboplatin-resistant A2780 (A2780/CP70) cells (IC50 = >100 μM). It is selective for A2780 cells over non-cancerous ARPE19 cells (IC50 = 1,660 μM). 4-oxo-27-TBDMS Withaferin A induces DNA fragmentation in A2780 cells.References1. Perestelo, N.R., Llanos, G.G., Reyes, C.P., et al. Expanding the chemical space of withaferin A by incorporating silicon to improve its clinical potential on human ovarian carcinoma cells. J. Med. Chem. 62(9), 4571-4585 (2019). 4-oxo-27-TBDMS Withaferin A is a derivative of the steroidal lactone withaferin A that has anticancer activity.1 It is cytotoxic to A2780 ovarian cancer cells (IC50 = 17 μM) but not to carboplatin-resistant A2780 (A2780/CP70) cells (IC50 = >100 μM). It is selective for A2780 cells over non-cancerous ARPE19 cells (IC50 = 1,660 μM). 4-oxo-27-TBDMS Withaferin A induces DNA fragmentation in A2780 cells. References1. Perestelo, N.R., Llanos, G.G., Reyes, C.P., et al. Expanding the chemical space of withaferin A by incorporating silicon to improve its clinical potential on human ovarian carcinoma cells. J. Med. Chem. 62(9), 4571-4585 (2019).

4-oxo Withaferin A is a derivative of the steroidal lactone withaferin A that has anticancer activity.1 It is cytotoxic to A2780 ovarian cancer cells and carboplatin-resistant A2780 (A2780/CP70) cells (IC50s = 7.3 and <1 μM, respectively) and is 4.4-fold selective for A2780 cells over non-cancerous ARPE19 cells.References1. Perestelo, N.R., Llanos, G.G., Reyes, C.P., et al. Expanding the chemical space of withaferin A by incorporating silicon to improve its clinical potential on human ovarian carcinoma cells. J. Med. Chem. 62(9), 4571-4585 (2019). 4-oxo Withaferin A is a derivative of the steroidal lactone withaferin A that has anticancer activity.1 It is cytotoxic to A2780 ovarian cancer cells and carboplatin-resistant A2780 (A2780/CP70) cells (IC50s = 7.3 and <1 μM, respectively) and is 4.4-fold selective for A2780 cells over non-cancerous ARPE19 cells. References1. Perestelo, N.R., Llanos, G.G., Reyes, C.P., et al. Expanding the chemical space of withaferin A by incorporating silicon to improve its clinical potential on human ovarian carcinoma cells. J. Med. Chem. 62(9), 4571-4585 (2019).

27-O-(tert-Butyldimethylsilyl)withaferin A (compound 9a) 为一种天然茄内酯类化合物，具备诱导细胞凋亡 (apoptosis) 的能力。该化合物对人类癌细胞系HeLa、A-549、MCF-7以及正常Vero细胞展现出抗增殖活性。

3-(2-Hydroxyethyl) thio withaferin A 为Withaferin A衍生物，后者为甾体内酯，能够抑制NF-kB活性并靶向波形蛋白(vimentin)，展现出抗炎及抗肿瘤效果。此外，Withaferin A亦为内皮蛋白C受体(EPCR)脱落的抑制剂。

4-Methyl withaferin A为withaferin A的类似物，表现出抗肿瘤活性。

4-epi-Withaferin A（化合物28）是Withaferin A的一个类似物，它增强了细胞毒性及细胞保护性热休克诱导活性（HSA）。此外，4-epi-Withaferin A还展现了通过激活细胞防御机制来研究蛋白质聚集相关疾病的潜力。

4,27-Dimethyl withaferin A 是一种合成的 withanolide 类似化合物，具潜在应用于神经退行性疾病研究。

3-Ethylthio withaferin A为Withaferin A的衍生物，具有抑制NF-kB的活性。

27-O-acetyl-withaferin A is a natural product

3beta-Methoxy-2,3-dihydrowithaferin A has cytoprotective activity, it protects normal cells against stress.

6alpha-Chloro-5beta-hydroxywithaferin A is a natural product

Dihydrowithaferin A 是一种从 Withania somnifera 中分离出来的 withanolide，具有抗乙酰胆碱酯酶 (AChE) 的活性。饮食中的Dihydrowithaferin A 可以预防或减少肿瘤的生长。

2,3-Dihydro-3-methoxywithaferin A is a natural withanolide , is cytotoxic to human cancer cells, and is a candidate anticancer natural compound. It protects normal cells against stress.