Electrochemical Detection of Neuroendocrine Tumor Biomarkers

Neuroendocrine tumours represent a heterogeneous group of neoplasms arising from cells that release hormones into the bloodstream. Early and accurate measurement of specific metabolites such as vanillylmandelic acid (VMA) and homovanillic acid (HVA) is essential for diagnosis, prognosis and patient monitoring. Conventional laboratory methods often rely on chromatographic separation followed by mass spectrometric or immunoassay detection, which can be time‐consuming and require centralised facilities. Electrochemical sensors offer a complementary approach by transducing redox reactions of target analytes at modified electrode surfaces into quantifiable electrical signals. Advances in electrode materials, surface chemistry and detection schemes have driven improvements in sensitivity, selectivity and response time. Incorporation of molecular receptors, nanostructured metal oxides and conductive polymers has enabled discrimination between structurally similar metabolites in complex biological fluids. Moreover, miniaturised platforms and point‐of‐care prototypes are emerging, promising decentralised testing and real‐time monitoring. Ongoing efforts focus on lowering limits of detection to submicromolar levels, enhancing anti‐fouling properties for use in untreated urine or plasma, and integrating wireless data transmission for clinical decision support. The global significance of these methods lies in their potential to reduce diagnostic delays, cut costs and widen access to specialised testing in regions with limited laboratory infrastructure.

Research from Nature Portfolio

No recent Nature Portfolio content available.

Electrochemical Detection of Neuroendocrine Tumor Biomarkers publication trend

The graph below shows the total number of articles in electrochemical detection of neuroendocrine tumor biomarkers across all publications each year (not limited to Nature Index journals).

Technical terms

Voltammetry: An electrochemical technique that measures current as a function of applied potential to characterise redox‐active species.

Potentiometry: A method that detects changes in electrode potential resulting from selective binding of target analytes, without applying a sweeping potential.

Differential Pulse Voltammetry (DPV): A sensitive voltammetric mode in which small potential pulses are superimposed on a linear sweep to enhance resolution and lower detection limits.

Electrochemical Impedance Spectroscopy (EIS): A frequency‐domain technique used to probe interfacial properties of electrode coatings and monitor charge transfer resistance.

Biomarker: A measurable molecule indicative of physiological or pathological processes, here referring to VMA and HVA as reporters of neuroendocrine tumour activity.

Limit of Detection (LOD): The lowest concentration of analyte that can be reliably distinguished from background noise under specified conditions.

References

1. Voltammetric Detection of Vanillylmandelic Acid and Homovanillic Acid Using Urea-Derivative-Modified Graphite Electrode. Sensors (2023).
2. Synthesis and deposition of a Tröger’s base polymer on the electrode surface for potentiometric detection of a neuroblastoma tumor marker metabolite. Chemical Communications (2016).
3. Synthesis and characterization of nanostructured copper and lanthanum co‐doped zirconia for voltammetric sensing of tumor biomarkers. Electrochemical Science Advances (2021).