review · European journal of medical research
Magnetic nanoparticles possess distinct physicochemical features, such as a high surface-area-to-volume ratio, adjustable size, biological compatibility, and responsiveness to external magnetic fields. These characteristics allow them to display programmable and responsive behaviour for precise therapeutic and diagnostic uses. In oncology, these materials support targeted drug delivery directly to tumours, which reduces systemic side effects and enhances treatment specificity. They can also cross the blood-brain barrier and generate localised heat under alternating magnetic fields to selectively destroy malignant cells through hyperthermia. Furthermore, their adaptable surface chemistry enables functionalisation with biocompatible polymers, ligands, and stabilising agents, improving their stability and lowering immune reactions in physiological environments. Such modifications also advance magnetic resonance imaging contrast enhancement and biomolecular separation techniques.
Conventional cancer treatments often harm healthy tissues while struggling to reach hard-to-access sites such as the brain. Magnetic nanoparticles offer a dual capability in diagnosis and therapy, allowing clinicians to improve imaging clarity, guide therapies precisely to tumours using external magnets, and destroy cancerous cells with heat, thereby reducing unwanted side effects across the body.
The technology holds promise for medical device manufacturers, imaging contrast developers, and pharmaceutical companies working on targeted therapeutics. Applications span oncology drug delivery, magnetic resonance imaging enhancement, and hyperthermia systems. As a broad review of technological breakthroughs, the work highlights early-stage research and applied testing across various formulations rather than a single market-ready product, requiring further translation before entering clinical use.
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Magnetic nanoparticles (MNPs) have emerged as powerful tools in biomedicine due to their distinct physicochemical characteristics, including a high surface-area-to-volume ratio, adjustable size, magnetic sensitivity, and compatibility with biological systems. These properties enable precise control through external magnetic fields, making MNPs highly effective in targeted therapeutic and diagnostic applications. Although not inherently intelligent, they can exhibit programmable and responsive behavior under external influence, enhancing their utility in drug delivery and hyperthermia-based treatments. In the medical field, MNPs have been extensively explored for their role in magnetic resonance imaging (MRI) enhancement, selective drug transport, hyperthermia cancer therapy, and biomolecular separation. Within oncology, they facilitate the direct delivery of therapeutic compounds to tumors, reducing systemic side effects and increasing treatment specificity. Additionally, their capacity to produce localized heat when exposed to alternating magnetic fields makes them instrumental in hyperthermia therapy, where malignant cells are selectively eradicated. A key advantage of MNPs is their adaptable surface chemistry, which allows for functionalization with biocompatible polymers, ligands, and other stabilizing agents. These modifications enhance their stability, minimize immune responses, and optimize their performance in physiological environments. Functionalized MNPs have contributed significantly to improving MRI contrast, refining drug delivery mechanisms, and increasing the effectiveness of hyperthermia treatments. This review examines recent breakthroughs in MNP-based medical technologies, with an emphasis on tumor targeting, drug delivery across the blood-brain barrier, and hyperthermia applications.
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DOI: 10.1186/s40001-025-02696-z
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