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Sodium current in NG108-15 cell inhibited by scorpion toxin BmKAS-1 and restored by its specific monoclonal antibodies.
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Abstract
Effect on Na+ current of BmKAS-1, a novel polypeptide purified from the venom of Chinese scorpion Buthus martensi Karsch (BmK), has been investigated in differentiated NG108-15 cells by using patch-clamp whole-cell recording. Neutralizing effect of four monoclonal antibodies of BmKAS-1 (mAb #2, #3, #4, and #5) has also been observed. The results showed that Na+ current was irreversibly inhibited by BmKAS-1 and the inhibitory effect was abolished by mAb #2 and #5, but not by mAb #3 and #4.