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Targeted alpha-particle therapy (or TAT) is an in-development method of targeted radionuclide therapy of various cancers. It employs radioactive substances which undergo alpha decay to treat diseased tissue at close proximity. [1] It has the potential to provide highly targeted treatment, especially to microscopic tumour cells.
Alpha radiation is a nuclear phenomenon in which a heavy radionuclide emits an energetic alpha particle (consisting of two protons and two neutrons) and transmutes to a different radionuclide. The emitted alpha particle has a range in tissue of only 40-90 microns, which minimizes collateral damage when used for treatment purposes.
Alpha emitters such as actinium-225 are favored in cancer treatment because of the short range (a few cell diameters) of alpha particles in tissue and their high energy, rendering them highly effective in targeting and killing cancer cells—specifically, alpha particles are more effective at breaking DNA strands.
The use of radium-223 to treat metastatic bone cancer relies on the ability of alpha radiation from radium-223 and its short-lived decay products to kill cancer cells. Radium is preferentially absorbed by bone by virtue of its chemical similarity to calcium, with most radium-223 that is not taken up by the bone being cleared, primarily via the ...
Radioimmunotherapy (RIT) uses an antibody labeled with a radionuclide to deliver cytotoxic radiation to a target cell. [1] It is a form of unsealed source radiotherapy.In cancer therapy, an antibody with specificity for a tumor-associated antigen is used to deliver a lethal dose of radiation to the tumor cells.
Patients and their diseases are profiled in order to identify the most effective treatment for their specific case. Targeted therapy or molecularly targeted therapy is one of the major modalities of medical treatment (pharmacotherapy) for cancer, [1] others being hormonal therapy and cytotoxic chemotherapy.
Men can do the same,” says Alex Robboy, a sex therapist in Philadelphia. Essentially, kegel exercises are a way of contracting the muscles of the pelvic floor, which give you greater control and ...
[75] [76] In their Phase II clinical trial, they used the Sumitomo Heavy Industries accelerator at the Osaka Medical College, Kansai BNCT Medical Center to treat a total of 24 patients. [75] These patients ranged in age from 20 to 75 years, and all previously had received standard treatment consisting of surgery followed by chemotherapy with ...