Editorial: Vanadium biochemistry – highlights from the 13th international vanadium symposium
Year: 2026
Type: editorial
Abstract: from plenary speakers and other participants and aimed to bring together representative advances in vanadium chemistry with direct relevance to chemical biology. Across five contributions, a shared message emerges: mechanistic understanding of vanadium in chemical biology cannot be separated from an understanding of its solution behavior, interfacial interactions, and the experimental conditions under which biology is tested.Two papers directly address the challenge posed by chemical speciation. Ždrnja, Gumerova, and Rompel (add link) examine the concentration-dependent stability and hydrolysis of Keggin-and Wells-Dawson-type polyoxotungstates across pH 2-8 in commonly used buffer systems. They employ 31 P NMR to quantify speciation trends and to reveal how ionic strength and buffer composition shape stability and hydrolysis pathways as reported previously for other systems (Ždrnja et al. 2024). Their findings emphasize a point that is often overlooked: buffer choice and concentration are not inert variables, particularly in polyoxometalate studies and, by extension, in much of vanadium chemistry.Garribba's Perspective (add link) presents a complementary approach (add link), making the case for electron paramagnetic resonance (EPR) as a selective and mechanistically informative tool for probing vanadium(IV) chemistry. The Perspective details solution transformations and coordination environments in vanadium(IV) chemistry, with emphasis on biologically relevant species and their behavior in the presence of biomolecules such as amino acids, reducing agents, and proteins. Considering the redox activity of vanadium compounds, a method to study vanadium(IV) is critical to understand the mechanisms of vanadium-compound in biological systems (Pessoa, et al. 2015;Dinda et al., 2025). In addition, the Perspective highlights the need for a practical standard for the field: speciation characterization should be treated as essential, not as optional support, whenever biological outcomes are reported.A second The next group of contributions examines how metal-oxo clusters engage with biological interfaces, which is relevant to connect physicochemical properties to cellular outcomes (Aureliano et al., 2021;Ždrnja et al. 2024). Pashkovskaya and colleagues (add link) study the interaction of Anderson-Evans-type polyoxometalates with lipid membranes, tracking changes in ζ-potential and liposome size across phospholipid compositions. Their results show that membrane composition, including the presence of negatively charged lipids such as cardiolipin, modulates polyoxometalate binding, and that ionic conditions alter observed interaction signatures. For a class of compounds frequently associated with antimicrobial and antitumor activities (Aureliano et al., 2021) this kind of controlled, quantitative treatment of electrostatics-driven association is particularly valuable.Paredes-Pérez and co-authors (add link) approach (add link) protein-like microenvironments from a different angle. They use small "biomimetic" salts guanidinium and spermidinium decavanadates as "biomimetic" salts to probe how the decavanadate anion engages motifs resembling arginine and lysine side chains, which are residues frequently implicated in the binding of decavanadates to proteins binding. Through a combination of spectroscopy, crystallography, DFT-derived interaction energies, and non-covalent interaction analyses, they characterize the hydrogen-bonding and electrostatic contacts that explain how polyoxidovanadates can be accommodated within protein environments. The contribution is notable for bridging the gap between a reactive anion in solution and a binding interaction with definable non-covalent architecture. and continue to demonstrate the versatility of decavanadates.The final original research article in the Topic illustrates a mature, medicinally oriented vanadium study. Levina and colleagues (add link) report the solution behavior and in vitro antiproliferative activity of a mixed-ligand vanadium(V) complex, incorporating the antifungal and antibacterial agent clioquinol, in glioblastoma (T98G) cells. In this study, biological activity is not treated as a standalone endpoint: the authors track stability and speciation in relevant media by UV-Vis and discuss explicitly how ligand dissociation and hydrolysis both complicate and potentially explain observed cellular effects, including in experiments probing iron dependence. The result is a study where bioactivity observations are mechanistically grounded in the species formed under the studied assay conditions. This study furthermore demonstrates that the vanadium-compounds developed for Chagas disease (Scalese et al. 2021) also are also active against glioblastoma.The contributions collected here reinforce three directions that will likely continue to define some of the directions of the field going forward. This collection of original research and perspective articles shows three important future trends in the field of Vanadium Biochemistry. Speciation should be treated as a design principle: concentration, ionic strength, and buffer composition can be determinant variables, especially for redox-active vanadium complexes and polyoxometalates. Multi-modal characterization should offer a path from physicochemical characterization to biological context, linking solution-phase spectroscopy (EPR, 31 P NMR) with interface-sensitive assays (ζ-potential, liposome readouts) -offers an insightful path from physicochemical characterization to biological context. And, translational studies with therapeutic objectives should continue to test mechanistic hypotheses should be tested through translational studies, and when possible, tracking the chemical forms present in biological media and considering speciation-driven elucidations for cellular outcomes.
Source: Frontiers in Chemical Biology
Authors: Isabel Correia, Debbie C. Crans
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,353
OpenAlex ID: W7163002228