期刊
出版社
CEVAP-SAO PAULO STATE UNIV-UNESP
DOI: 10.1590/1678-9199-JVATITD-2020-0125
关键词
Naja mandalayensis; Proteome; Spitting cobra; Three-finger toxins; SVMP; Enzymes
资金
- Coordination for the Improvement of Higher Education Personnel (CAPES) [001]
- Financier of Studies and Projects (FINEP) [01.09.0278.04, 01.12.0450.03]
- National Council for Scientific and Technological Development (CNPq) [406385/20181]
- Sao Paulo Research Foundation (FAPESP) [15/13142-3]
- CNPq [301974/2019-5]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [15/13142-3] Funding Source: FAPESP
This study conducted a biochemical characterization of the venom of Naja mandalayensis and identified a wide variety of toxic components, providing a better understanding of the envenomation mechanism of this species.
Background: Naja mandalayensis is a spitting cobra from Myanmar. To the best of our knowledge, no studies on this venom composition have been conducted so far. On the other hand, few envenomation descriptions state that it elicits mainly local inflammation in the victims' eyes, the preferred target of this spiting cobra. Symptoms would typically include burning and painful sensation, conjunctivitis, edema and temporary loss of vision. Methods: We have performed a liquid-chromatography (C18-RP-HPLC) mass spectrometry (ESI-IT-TOF/MS) based approach in order to biochemically characterize N. mandalayensis venom. Results: A wide variety of three-finger toxins (cardiotoxins) and metallopeptidases were detected. Less abundant, but still representative, were cysteine-rich secretory proteins, L-amino-acid oxidases, phospholipases A 2, venom 5'-nucleotidase and a serine peptidase inhibitor. Other proteins were present, but were detected in a relatively small concentration. Conclusion: The present study set the basis for a better comprehension of the envenomation from a molecular perspective and, by increasing the interest and information available for this species, allows future venom comparisons among cobras and their diverse venom proteins.
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