{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,15]],"date-time":"2026-07-15T00:06:56Z","timestamp":1784074016749,"version":"3.55.0"},"reference-count":67,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2022,10,23]],"date-time":"2022-10-23T00:00:00Z","timestamp":1666483200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007029","name":"Science Committee of the Ministry of Education, Science, Culture and Sports of RA","doi-asserted-by":"publisher","award":["21AG-1F031"],"award-info":[{"award-number":["21AG-1F031"]}],"id":[{"id":"10.13039\/501100007029","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Toxins"],"abstract":"<jats:p>Increasing concern about the use of animal models has stimulated the development of in vitro cell culture models for analysis of the biological effects of snake venoms. However, the complexity of animal venoms and the extreme synergy of the venom components during envenomation calls for critical review and analysis. The epithelium is a primary target for injected viper venom\u2019s toxic substances, and therefore, is a focus in modern toxinology. We used the Vero epithelial cell line as a model to compare the actions of a crude Macrovipera lebetina obtusa (Levantine viper) venom with the actions of the same venom with two key enzymatic components inhibited (specifically, phospholipase A2 (PLA2) and metalloproteinases) in the bioenergetic cellular response, i.e., oxygen uptake and reactive oxygen species generation. In addition to the rate of free-radical oxidation and lipid peroxidation, we measured real-time mitochondrial respiration (based on the oxygen consumption rate) and glycolysis (based on the extracellular acidification rate) using a Seahorse analyzer. Our data show that viper venom drives an increase in both glycolysis and respiration in Vero cells, while the blockage of PLA2 or\/and metalloproteinases affects only the rates of the oxidative phosphorylation. PLA2-blocking in venom also increases cytotoxic activity and the overproduction of reactive oxygen species. These data show that certain components of the venom may have a different effect within the venom cocktail other than the purified enzymes due to the synergy of the venom components.<\/jats:p>","DOI":"10.3390\/toxins14110724","type":"journal-article","created":{"date-parts":[[2022,10,24]],"date-time":"2022-10-24T11:53:55Z","timestamp":1666612435000},"page":"724","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["The Contribution of Phospholipase A2 and Metalloproteinases to the Synergistic Action of Viper Venom on the Bioenergetic Profile of Vero Cells"],"prefix":"10.3390","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7588-2277","authenticated-orcid":false,"given":"Naira","family":"Ayvazyan","sequence":"first","affiliation":[{"name":"Orbeli Institute of Physiology, Orbely str. 22, Yerevan 0028, Armenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0796-6062","authenticated-orcid":false,"given":"Gevorg","family":"Ghukasyan","sequence":"additional","affiliation":[{"name":"Orbeli Institute of Physiology, Orbely str. 22, Yerevan 0028, Armenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lusine","family":"Ghulikyan","sequence":"additional","affiliation":[{"name":"Orbeli Institute of Physiology, Orbely str. 22, Yerevan 0028, Armenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gayane","family":"Kirakosyan","sequence":"additional","affiliation":[{"name":"Orbeli Institute of Physiology, Orbely str. 22, Yerevan 0028, Armenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gohar","family":"Sevoyan","sequence":"additional","affiliation":[{"name":"Orbeli Institute of Physiology, Orbely str. 22, Yerevan 0028, Armenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Armen","family":"Voskanyan","sequence":"additional","affiliation":[{"name":"Orbeli Institute of Physiology, Orbely str. 22, Yerevan 0028, Armenia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zaruhi","family":"Karabekyan","sequence":"additional","affiliation":[{"name":"Orbeli Institute of Physiology, Orbely str. 22, Yerevan 0028, Armenia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,10,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"593","DOI":"10.1016\/S0272-2712(18)30023-4","article-title":"Toxins as weapons of mass destruction. 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