Abstract:Purpose
Cardiovascular disease (CVD) is a leading cause of death worldwide, with coronary artery disease (CAD) accounting for nearly half of all CVD deaths. The current gold standard for CAD diagnosis is catheter coronary angiography (CCA), an invasive, expensive procedure. Computed tomography coronary angiography (CTCA) represents an attractive non‐invasive alternative to CCA, however, CTCA requires gated acquisition of CT data during periods of minimal cardiac motion (quiescent periods) to avoid non‐diagnost… Show more
“…Compared to near‐infrared light (penetrating ≈1 cm), sonotherapy allows ultrasound to reach deeper into the tissue (>10 cm). [ 4 ] This increased penetration depth means that sonotherapy can be used to treat deeper, less accessible solid tumors. [ 5 ] Clinical sonotherapy is divided into two types: sonodynamic therapy and high‐intensity focused ultrasound treatment.…”
Phototherapy and sonotherapy are recognized by scientific medicine as effective strategies for treating certain cancers. However, these strategies have limitations such as an inability to penetrate deeper tissues and overcome the antioxidant tumor microenvironment. In this study, a novel “BH” interfacial‐confined coordination strategy to synthesize hyaluronic acid‐functionalized single copper atoms dispersed over boron imidazolate framework‐derived nanocubes (HA‐NC_Cu) to achieve sonothermal–catalytic synergistic therapy is reported. Notably, HA‐NC_Cu demonstrates exceptional sonothermal conversion performance under low‐intensity ultrasound irradiation, attained through intermolecular lattice vibrations. In addition, it shows promise as an efficient biocatalyst, able to generate high‐toxicity hydroxyl radicals in response to tumor‐endogenous hydrogen peroxide and glutathione. Density functional theory calculations reveal that the superior parallel catalytic performance of HA‐NC_Cu originates from the CuN4C/B active sites. Both in vitro and in vivo evaluations consistently demonstrate that the sonothermal–catalytic synergistic strategy significantly improves tumor inhibition rate (86.9%) and long‐term survival rate (100%). In combination with low‐intensity ultrasound irradiation, HA‐NC_Cu triggers a dual death pathway of apoptosis and ferroptosis in MDA‐MB‐231 breast cancer cells, comprehensively limiting primary triple‐negative breast cancer. This study highlights the applications of single‐atom‐coordinated nanotherapeutics in sonothermal–catalytic synergistic therapy, which may create new opportunities in biomedical research.
“…Compared to near‐infrared light (penetrating ≈1 cm), sonotherapy allows ultrasound to reach deeper into the tissue (>10 cm). [ 4 ] This increased penetration depth means that sonotherapy can be used to treat deeper, less accessible solid tumors. [ 5 ] Clinical sonotherapy is divided into two types: sonodynamic therapy and high‐intensity focused ultrasound treatment.…”
Phototherapy and sonotherapy are recognized by scientific medicine as effective strategies for treating certain cancers. However, these strategies have limitations such as an inability to penetrate deeper tissues and overcome the antioxidant tumor microenvironment. In this study, a novel “BH” interfacial‐confined coordination strategy to synthesize hyaluronic acid‐functionalized single copper atoms dispersed over boron imidazolate framework‐derived nanocubes (HA‐NC_Cu) to achieve sonothermal–catalytic synergistic therapy is reported. Notably, HA‐NC_Cu demonstrates exceptional sonothermal conversion performance under low‐intensity ultrasound irradiation, attained through intermolecular lattice vibrations. In addition, it shows promise as an efficient biocatalyst, able to generate high‐toxicity hydroxyl radicals in response to tumor‐endogenous hydrogen peroxide and glutathione. Density functional theory calculations reveal that the superior parallel catalytic performance of HA‐NC_Cu originates from the CuN4C/B active sites. Both in vitro and in vivo evaluations consistently demonstrate that the sonothermal–catalytic synergistic strategy significantly improves tumor inhibition rate (86.9%) and long‐term survival rate (100%). In combination with low‐intensity ultrasound irradiation, HA‐NC_Cu triggers a dual death pathway of apoptosis and ferroptosis in MDA‐MB‐231 breast cancer cells, comprehensively limiting primary triple‐negative breast cancer. This study highlights the applications of single‐atom‐coordinated nanotherapeutics in sonothermal–catalytic synergistic therapy, which may create new opportunities in biomedical research.
Freehand optical ultrasound (OpUS) imaging is an emerging ultrasound imaging paradigm that uses an array of fibre-optic, photoacoustic ultrasound sources and a single fibre-optic ultrasound detector to perform ultrasound imaging without the need for electrical components in the probe head. Previous freehand OpUS devices have demonstrated capability for real-time, video-rate imaging of clinically relevant targets, but have been hampered by poor ultrasound penetration, significant imaging artefacts and low frame rates, and their designs limited their clinical applicability. In this work we present a novel freehand OpUS imaging platform, including a fully mobile and compact acquisition console and an improved probe design. The novel freehand OpUS probe presented utilises optical waveguides to shape the generated ultrasound fields for improved ultrasound penetration depths, an extended fibre-optic bundle to improve system versatility and an overall ruggedised design with protective elements to improve probe handling and protect the internal optical components. This probe is demonstrated with phantoms and the first multi-participant in vivo imaging study conducted with freehand OpUS imaging probes, this represents several significant steps towards the clinical translation of freehand OpUS imaging.
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