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The effects of persimmon tannin (PT) characteristic structural elements on Naja atra phospholipase A 2 (PLA 2 )-induced lethality, myotoxicity, and hemolysis in mice models were determined. In addition, methods including surface plasmon resonance, dynamic light scattering, and Fourier transform infrared spectroscopy were explored to uncover the possible detoxifying mechanisms of PT on snake venom PLA 2 . Our results revealed that PT characteristic elements (EGCG, ECG, A-type EGCG dimer, and A-type ECG dimer) could neutralize the lethality, myotoxicity, and hemolysis of PLA 2 . Moreover, the detoxifying effects of the four structural elements correlated with their structural disturbing effects well. Our results proved that A-type EGCG dimer and A-type ECG dimer may be structural requirements for the detoxifying effects of PT. We propose that the high affinity of A-type EGCG dimer and A-type ECG dimer for PLA 2 and the considerable spatial structural disturbance of PLA 2 induced by the dimers may be responsible for their antilethality, antimyotoxicity, and antihemolysis on Chinese cobra PLA 2 in vivo.

journal of food and drug analysis

The detoxifying effects of structural elements of persimmon tannin on Chinese cobra phospholipase A 2 correlated with their structural disturbing effects well