| Bioactivity | Celastrol (Tripterine;Tripterin) is a proteasome inhibitor which potently and preferentially inhibits the chymotrypsin-like activity of a purified 20S proteasome with IC50 of 2.5 μM. | |||||||||
| Invitro | Celastrol (Tripterine;Tripterin) significantly inhibits the proteasomal chymotrypsin activity in PC-3 cells in a concentration-dependent manner; at 2.5 μM it reaches ~55% inhibition, comparable to its potency to a purified 20S proteasome (IC50=2.5 μM). Furthermore, increased levels of IκB-α, Bax, and p27 are observed, three well known target proteins of the proteasome in PC-3 cells treated with Celastrol[1]. | |||||||||
| In Vivo | Treatment of PC-3 tumor-bearing nude mice with Celastrol (1-3 mg/kg/d, i.p., 1-31 days) results in significant inhibition (65-93%) of the tumor growth[1]. Following treatment with 3 and 6 mg/kg Celastrol, the levels of malondialdehyde (MDA) are significantly decreased by 35.2 and 36.7% (P<0.05), respectively. Treatment with 3 and 6 mg/kg Celastrol markedly restores the GSH level (P<0.05) to almost normal levels[2]. | |||||||||
| Name | Celastrol | |||||||||
| CAS | 34157-83-0 | |||||||||
| Formula | C29H38O4 | |||||||||
| Molar Mass | 450.61 | |||||||||
| Appearance | Solid | |||||||||
| Transport | Room temperature in continental US; may vary elsewhere. | |||||||||
| Storage |
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| Reference | [1]. Yang H, et al. Celastrol, a triterpene extracted from the Chinese "Thunder of God Vine," is a potent proteasome inhibitor and suppresses human prostate cancer growth in nude mice. Cancer Res. 2006 May 1;66(9):4758-65 [2]. Guan Y, et al. Celastrol attenuates oxidative stress in the skeletal muscle of diabetic rats by regulating the AMPK-PGC1α-SIRT3 signaling pathway. Int J Mol Med. 2016 May;37(5):1229-38. |