Here we describe the acute myocardial effects of an elapid (red spitting cobra, Naja pallida) and a viper (western diamondback rattlesnake, Crotalus atrox) venom using an ex vivo heart model. Our results reveal two different pathophysiological trajectories that influence heart function and morphology. While cobra venom causes a drop in contractile force, rattlesnake venom causes enhanced contractility and frequency that coincides with differences in myocellular morphology. This highlights the medical complexity of snake venom-induced cardiotoxicity.
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http://dx.doi.org/10.1016/j.toxicon.2024.107637 | DOI Listing |
Toxicon
January 2025
Venom Research Centre, Chittagong Medical College, Chattogram-4203, Bangladesh; Department of Zoology, University of Chittagong, Chattogram-4331, Bangladesh.
Handling venomous snakes poses a significant risk of envenomation. In the case of spitting cobras, additional precautions, like wearing face shields, are necessary to prevent ophthalmic envenomation. Although, the Monocled Cobra (Naja kaouthia) is not a true spitting cobra, however some spitting events has been reported from Northeastern India and Nepal but ocular envenomation is scarce.
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December 2024
Instituto Clodomiro Picado, Facultad de Microbiología, Universidad de Costa Rica, San José, Costa Rica.
Recent research suggests that a polygeneric immunogen made from the venoms of the most medically important viperid and elapid snakes in sub-Saharan Africa could elicit a broader antibody response in horses compared to the current EchiTAb-plus-ICP antivenom, especially against neurotoxic elapid venoms. To test this, 25 horses that have been regularly immunized to produce this antivenom were reimmunized with an immunogen containing 22 venoms from various snake species from the genera , , , and both spitting and non-spitting . The plasma collected from these horses was processed using the caprylic acid method to produce an industrial-scale freeze-dried antivenom.
View Article and Find Full Text PDFTrans R Soc Trop Med Hyg
November 2024
Department of Immunology, Institute of Endemic Diseases, University of Khartoum, P.O. Box 11463, Khartoum, Sudan.
Background: Neurotoxicity is a common feature of elapid snake envenomation. There are limited studies on the toxicity of Naja nubiae venom, the Nubian spitting cobra, from north-east Africa.
Methods: We used the chick biventer cervicis nerve-muscle preparation to demonstrate the neurotoxic effect of N.
Toxicon
November 2024
Department of Emergency Medicine, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia.
Sci Transl Med
July 2024
Charles Perkins Centre, Dr. John and Anne Chong Lab for Functional Genomics, and School of Life and Environmental Sciences, University of Sydney, Camperdown, NSW 2006, Australia.
Snakebites affect about 1.8 million people annually. The current standard of care involves antibody-based antivenoms, which can be difficult to access and are generally not effective against local tissue injury, the primary cause of morbidity.
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