Mass Spectrometry-Based Quantification in Snake Venomics and Antivenomics: Current Trends and Future Perspectives

Snake venomics and antivenomics approaches have increasingly relied on mass spectrometry to characterize the venom components and to evaluate the antivenom neutralization potential. However, accurate quantification remains essential for distinguishing biologically relevant toxins from snake venom and for translating proteomic data into meaningful clinical interpretations. This review article examines the role of quantitative analysis in snake venomics and antivenomics, with special emphasis on massspectrometry-based strategies used to estimate toxin abundance. This review summarizes the main applications and limitations of mass spectrometry in venom research covering bottom-up and top-down proteomics, venom databases, toxin quantification, and how MS-based quantification determines the efficacy of antivenom through antivenomics approaches. This review also explains why abundance alone cannot determine the biological or therapeutic importance of a toxin. The article discusses label and label-free based quantification, absolute quantification approaches, top-down venomics, mass spectrometry-based antivenomics, and the integration of proteo-transcriptomic workflows in snake venom research. These approaches can be affected by several factors including the problem of measuring toxin isoforms that share similar protein structures and toxin components that are important for antivenom recognition within complex venom samples. A conceptual overview is provided of how inaccurate quantification can influence venom proteome comparisons among similar and different species, as well as the interpretation of antivenom binding and neutralization potential. Reliable mass-spectrometry-based quantification will be critical for linking the venom composition with toxicity, antivenom performance evaluations in preclinical settings, and evidence-based strategies for snake venom research and snakebite management.