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Leht 1 alates 21 tulemused
DNA damage enhancement by radiotherapy-activated hafnium oxide nanoparticles improves cGAS-STING pathway activation in human colorectal cancer cells.
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The cGAS-STING pathway can be activated by radiation induced DNA damage and because of its important role in anti-cancer immunity activation, methods to increase its activation in cancer cells could provide significant therapeutic benefits for patients. We explored the impact of hafnium oxide
Hafnium-doped hydroxyapatite nanoparticles with ionizing radiation for lung cancer treatment.
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Recently, photodynamic therapy (PDT) is one of the new clinical options by generating cytotoxic reactive oxygen species (ROS) to kill cancer cells. However, the optical approach of PDT is limited by tissue penetration depth of visible light. In this study, we propose that a ROS-enhanced
Gram-scale synthesis of highly biocompatible and intravenous injectable hafnium oxide nanocrystal with enhanced radiotherapy efficacy for cancer theranostic.
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Based on the ionizing radiation applied to the malignant tumor tissue, radiation therapy (RT) is the frequently-used non-surgical approach for cancer treatment. Hafnium Oxide (HfO2) based nanoagent has been used in clinical trials for radiosensitized tumor therapy. However, the current
Characterization of a Novel Hafnium-Based X-ray Contrast Agent.
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Characterization of BAY-576, a new x-ray contrast agent which is not based on iodine, but rather on the heavy metal hafnium. Compared with iodine, hafnium provides better x-ray absorption in the energy range of computed tomography (CT) and allows images of comparable quality to be acquired at a
Technical Note: A simulation study on the feasibility of radiotherapy dose enhancement with calcium tungstate and hafnium oxide nano- and microparticles.
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OBJECTIVE
To assess the radiotherapy dose enhancement (RDE) potential of calcium tungstate (CaWO4 ) and hafnium oxide (HfO2 ) nano- and microparticles (NPs). A Monte Carlo simulation study was conducted to gauge their respective RDE potentials relative to that of the broadly studied gold (Au) NP.
Antitumor activity of 1.3-diketonato zirconium (IV) and hafnium (IV) complexes.
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Ten six-coordinate dihalogenobis (1.3-diketonato)zirconium (IV) and hafnium (IV) complexes as well as seven halogenotris(1.3-diketonato) zirconium(IV) and hafnium(IV) species were prepared and characterized by their elemental analysis, IR- and NMR-spectra. Their antitumor activity was tested using
Light-controlled drug release from singlet-oxygen sensitive nanoscale coordination polymers enabling cancer combination therapy.
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The development of smart drug delivery systems to realize controlled drug release for highly specific cancer treatment has attracted tremendous attention. Herein, nanoscale coordination polymers (NCPs) constructed from hafnium ions and bis-(alkylthio) alkene (BATA), a singlet-oxygen responsive
Catalase-like metal-organic framework nanoparticles to enhance radiotherapy in hypoxic cancer and prevent cancer recurrence.
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Tumor hypoxia typically occurs inside a solid tumor with an inadequate oxygen supply, sharply reducing the therapeutic efficiency of radiotherapy and significantly increasing the risk of local tumor recurrence. Herein, we designed folic acid modified enzyme-like hafnium-based manganoporphyrin
Highly Effective Radioisotope Cancer Therapy with a Non-Therapeutic Isotope Delivered and Sensitized by Nanoscale Coordination Polymers.
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Nuclear medicine with radioisotopes is extremely useful for clinical cancer diagnosis, prognosis, and treatment. Herein, polyethylene glycol (PEG)-modified nanoscale coordination polymers (NCPs) composed of hafnium (Hf4+) and tetrakis (4-carboxyphenyl) porphyrin (TCPP) are prepared via a one-pot
Nanoscale metal-organic frameworks for combined photodynamic & radiation therapy in cancer treatment.
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Nanoscale metal organic frameworks (NMOFs) have shown great potential in biomedicine owing to their structural/chemical diversities, high molecular loading capacities, and intrinsic biodegradability. Herein, we report the rational design of a NMOF composed by hafnium (Hf(4+)) and tetrakis
NBTXR3, a first-in-class radioenhancer hafnium oxide nanoparticle, plus radiotherapy versus radiotherapy alone in patients with locally advanced soft-tissue sarcoma (Act.In.Sarc): a multicentre, phase 2-3, randomised, controlled trial.
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BACKGROUND
Pathological complete response to preoperative treatment in adults with soft-tissue sarcoma can be achieved in only a few patients receiving radiotherapy. This phase 2-3 trial evaluated the safety and efficacy of the hafnium oxide (HfO2) nanoparticle NBTXR3Nanoscale radiotherapy with hafnium oxide nanoparticles.
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OBJECTIVE
There is considerable interest in approaches that could improve the therapeutic window of radiotherapy. In this study, hafnium oxide nanoparticles were designed that concentrate in tumor cells to achieve intracellular high-energy dose deposit.
METHODS
Conventional methods were used,
Sensitive reversed-phase liquid chromatographic determination of fluoride based on its ternary systems with zirconium(IV) or hafnium(IV) and 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol.
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Optimum conditions for the direct reversed-phase LC determination of fluoride based on the ternary M-(F-)-(5-Br-PADAP) complexes [M = ZrIV or HfIV and 5-Br-PADAP = 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol] were evaluated. Chromatographic separation was performed with C18 end-capped column with
Nanoparticle radio-enhancement: principles, progress and application to cancer treatment.
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Enhancement of radiation effects by high-atomic number nanoparticles (NPs) has been increasingly studied for its potential to improve radiotherapeutic efficacy. The underlying principle of NP radio-enhancement is the potential to release copious electrons into a nanoscale volume, thereby amplifying
Monte Carlo dose enhancement studies in microbeam radiation therapy.
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OBJECTIVE
A radical radiation therapy treatment for gliomas requires extremely high absorbed doses resulting in subsequent deleterious side effects in healthy tissue. Microbeam radiation therapy (MRT) is an innovative technique based on the fact that normal tissue can withstand high radiation doses
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