毒理性
丁内酯导致脂质过氧化,破坏膜脂双层并损害膜蛋白。它还通过损害线粒体呼吸链复合物I–IV的活性,尤其是在肝脏中,诱导活性氧种类的产生,导致氧化应激。此外,丁内酯通过抑制Ca2+/Mg2+-ATPase和Na+/K+-ATPase的活性来破坏阳离子梯度,这可能是脂质过氧化的副作用,或者是通过与这些酶活性位点中的巯基结合。
Butenolide causes lipid peroxidation, disrupting the membrane lipid bilayer and causing damage to membrane protiens. It also induces production of reactive oxygen species by impairing the activities of complexes I–IV of the mitochondrial respiratory chain, especially in the liver, leading to oxidative stress. In addition, butenolide disrupts the cation gradient by inhibiting the activity of Ca2+/Mg2+-ATPase and Na+/K+-ATPase, likely either as a side effect of lipid peroxidation or by binding to the sulfhydryl groups in the active sites of these enzymes. (A3036, A3037)
来源:Toxin and Toxin Target Database (T3DB)