| Description: |
Magnesium lithospermate B is a naturally occurring, new generation antioxidant that activates eNOS and ameliorates endothelial dysfunction in diabetes by enhancing vasodilation in addition to reducing oxidative stress, it can protecte cardiomyocytes from ischemic injury through specific inhibition of TAB1-p38 apoptosis signaling. Magnesium lithospermate B possesses inhibitory activity on Na+,K+-ATPase, it provides anti-ischemic neuroprotection in gerbilssubjected to focal ischemia and reperfusion. Magnesium lithospermate B has potent antifibrotic effect in intraperitoneal thioacetamide (TAA)-treated cirrhotic rats, and inhibits fibrogenic responses in hepatic stellate cells (HSCs). It has depressor action on blood pressure in spontaneously hypertensive rats.Magnesium lithospermate B also has anti-wrinkle and anti-aging effects on skin. |
| In vitro: |
| Acta Pharmacol. Sin., 2000, 21(9):855-8. | | Free radical scavenging and inhibition of lipid peroxidation by Magnesium lithospermate B.[Pubmed: 11501171] | To study the effect of Magnesium Lithospermate B (Monomethyl lithospermate B,MLB) on the lipid peroxidation and on its free radical scavenging activity.
METHODS AND RESULTS:
MLB was incubated in rat tissue homogenate or in a free radical generating system. MLB induced inhibition of lipid peroxidation and its scavenging activity on superoxide anions and hydroxyl radicals was studied using colorimetric estimation.MLB inhibited the lipid peroxidation induced by either an auto-oxidant or Fe2+/VitC in vitro, in the liver homogenate, the inhibitory rate of MLB (10 mg/L) being 69.2% and 57.7%, respectively. MLB (25 and 50 mg/kg) decreased the amount of thiobarbituric acid reactive substances (TBARS) in rat serum, liver, kidney, and heart. However, it did not inhibit the lipid peroxidation of brain homogenate ex vivo. MLB scavenged superoxide anions generated from xanthine/xanthine oxidase system and iron-dependent hydroxyl radicals.
CONCLUSIONS:
MLB is an inhibitor of lipid peroxidation and scavenge superoxide anions and hydroxyl radicals both in vitro and ex vivo. |
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