Particles for the treatment of cancer in combination with radiotherapy
First Claim
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1. A method of treating cancer in a subject comprising:
- administering a particle to a locus or site of the cancer or to tumour tissue in the subject, which particle comprises a metal oxide, which metal oxide is titanium dioxide doped with from 0.1 to 25 mol % of at least one rare earth element, wherein the titanium dioxide is a host lattice and the at least one rare earth element is present as a dopant within said host lattice; and
applying X-ray radiation suitable for radiotherapy to the locus or site of the cancer or tumour tissue and thereby exciting the metal oxide in the particle at the locus or site of the cancer or tumour tissue and generating reactive oxygen species at the locus or site of the cancer or tumour tissue.
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Abstract
The invention provides a particle comprising a metal oxide which is doped with at least one rare earth element, wherein the metal oxide is selected from titanium dioxide, zinc oxide, cerium oxide and mixtures of two or more thereof. The invention also provides a pharmaceutical composition comprising the particles, and to uses of the particles and composition in the treatment and diagnosis of cancer.
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Citations
17 Claims
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1. A method of treating cancer in a subject comprising:
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administering a particle to a locus or site of the cancer or to tumour tissue in the subject, which particle comprises a metal oxide, which metal oxide is titanium dioxide doped with from 0.1 to 25 mol % of at least one rare earth element, wherein the titanium dioxide is a host lattice and the at least one rare earth element is present as a dopant within said host lattice; and applying X-ray radiation suitable for radiotherapy to the locus or site of the cancer or tumour tissue and thereby exciting the metal oxide in the particle at the locus or site of the cancer or tumour tissue and generating reactive oxygen species at the locus or site of the cancer or tumour tissue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 16, 17)
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15. An in vitro method of destroying cancer cells comprising adding a particle to a cell culture, medium or solution comprising cancer cells, then directing X-ray radiation at the cancer cells, wherein the particle comprises a metal oxide, which metal oxide is titanium dioxide and is doped with from 0.1 to 25 mol % of at least one rare earth element, and wherein the titanium dioxide is a host lattice and the at least one rare earth element is present as a dopant within said host lattice.
Specification