Photothermal Therapy Applications in Oncology

Photothermal therapy (PTT) harnesses light-absorbing agents to convert electromagnetic radiation into localized heat, inducing tumour cell death through hyperthermia. Central to this approach are photothermal conversion agents—often nanoparticles made of metals, carbon-based materials or organic semiconductors—which accumulate preferentially in tumours via passive or active targeting. Upon illumination, typically with near-infrared light, these agents raise the temperature of the tumour microenvironment to cytotoxic levels while sparing adjacent healthy tissue. Advances in agent design have improved photothermal conversion efficiency, biocompatibility and circulation time. Integration with imaging modalities allows real-time guidance and dosimetry, while combination with chemotherapy, radiotherapy or immunotherapy can yield synergistic effects. Preclinical studies in a range of solid tumour models have demonstrated rapid tumour ablation, immune activation and minimal systemic toxicity. Efforts now focus on precise control of heat delivery, deeper tissue penetration and scalable manufacturing of agents to accelerate clinical translation and broaden global access to minimally invasive cancer treatments.

Research from Nature Portfolio

Recent studies have demonstrated that simple spherical gold nanoparticles can act as efficient visible-light photothermal agents when irradiated at their plasmon resonance peak. In a breast cancer model, these particles not only produced rapid heat conversion at 530 nm but also enhanced the cytotoxicity of doxorubicin, yielding superior tumour cell kill compared to either treatment alone. Another investigation has introduced a single-particle and PET-based platform for quantitatively benchmarking the photothermal performance of plasmonic nano-heaters in vivo. By correlating temperature-sensitive assays with positron emission tomography of tumour glucose uptake, researchers established a reliable method to predict treatment response and to compare different nanoparticle geometries under clinical-style irradiation.

Photothermal Therapy Applications in Oncology publication trend

The graph below shows the total number of articles in photothermal therapy applications in oncology across all publications each year (not limited to Nature Index journals).

Technical terms

Photothermal therapy: A treatment that uses light-absorbing agents to generate heat for selective tumour ablation.

Nanoparticle: A submicrometre particle used to deliver therapeutic or imaging agents and convert light into heat.

Near-infrared radiation: Electromagnetic waves in the 700–1100 nm range that penetrate biological tissues effectively.

Surface plasmon resonance: Collective oscillation of electrons in metallic nanoparticles upon light excitation, enhancing light absorption.

Tumour microenvironment: The cellular, molecular and vascular milieu surrounding a tumour that influences treatment response.

References

1. Review article laser-induced hyperthermia on graphene oxide composites. Journal of Nanobiotechnology (2023).
2. Nanoparticle-mediated thermal Cancer therapies: Strategies to improve clinical translatability. Journal of Controlled Release (2024).
3. Photothermal enhancement of chemotherapy in breast cancer by visible irradiation of Gold Nanoparticles. Scientific Reports (2017).
4. Single Particle and PET-based Platform for Identifying Optimal Plasmonic Nano-Heaters for Photothermal Cancer Therapy. Scientific Reports (2016).
5. Photothermal conversion and transfer in photothermal therapy: From macroscale to nanoscale. Advances in Colloid and Interface Science (2022).