Abstract
To determine whether the ability to induce neurite outgrowth in rat pheochromocytoma cell line PC12 is characteristic of phospholipases of different types, we have studied the influence of phospholipase A2 (PLA2) from cobra Naja kaouthia venom and two PLA2s from viper Vipera nikolskii venom on PC12 cells. Phospholipases from the viper venom are heterodimers in which only one of the subunits is enzymatically active, while PLA2 from the cobra venom is a monomer. It was found that all three PLA2s induce neurite outgrowth in PC12. The PLA2 from cobra venom exhibits this effect at higher concentrations as compared to the viper enzymes. We have not observed such an activity for isolated subunits of viper PLA2s, since the enzymatically active subunits have very high cytotoxicity, while the other subunits are not active at all. However, co-incubation of active and inactive subunits before addition to the cells leads to a marked decrease in cytotoxicity and to restoration of the neurite-inducing activity. It has also been shown that all enzymatically active PLA2s are cytotoxic, the PLA2 from cobra venom being the least active. Thus, for the first time we have shown that PLA2s from snake venoms can induce neurite outgrowth in PC12 cells.
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Abbreviations
- PLA2:
-
phospholipase A2
- HDP:
-
heterodimeric phospholipase
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Original Russian Text © Ya. V. Makarova, A. V. Osipov, V. I. Tsetlin, Yu. N. Utkin, 2006, published in Biokhimiya, 2006, Vol. 71, No. 6, pp. 838–846.
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Makarova, Y.V., Osipov, A.V., Tsetlin, V.I. et al. Influence of phospholipases A2 from snake venoms on survival and neurite outgrowth in pheochromocytoma cell line PC12. Biochemistry (Moscow) 71, 678–684 (2006). https://doi.org/10.1134/S0006297906060125
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DOI: https://doi.org/10.1134/S0006297906060125