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Lutetium (177 Lu) chloride is a radioactive compound used for the radiolabeling of pharmaceutical molecules, aimed either as an anti-cancer therapy or for scintigraphy (medical imaging). [ 5 ] [ 6 ] It is an isotopomer of lutetium(III) chloride containing the radioisotope 177 Lu , which beta decays with a half-life of 6.64 days.
Forty radioisotopes have been characterized, with the most stable, besides 176 Lu, being 174 Lu with a half-life of 3.31 years, and 173 Lu with a half-life of 1.37 years. All of the remaining radioactive isotopes have half-lives that are less than 9 days, and the majority of these have half-lives that are less than half an hour.
The direct method of producing Lu-177 is by performing neutron irradiation on Lu-176 to Lu-177. This is an inexpensive and effective method to produce Lu-177. [25] In the United States, the main place that Lu-177 is produced is the University of Missouri Research Reactor. Once produced, Lu-177 is stable for 72 hours if stored below room ...
Lutetium (177 Lu) oxodotreotide or 177 Lu dotatate, brand name Lutathera, is a chelated complex of a radioisotope of the element lutetium with dotatate, used in peptide receptor radionuclide therapy. Specifically, it is used in the treatment of cancers which express somatostatin receptors . [ 5 ]
Lutetium occurs on the Earth in form of two isotopes: lutetium-175 and lutetium-176. Out of these two, only the former is stable, making the element monoisotopic . The latter one, lutetium-176, decays via beta decay with a half-life of 3.78 × 10 10 years ; it makes up about 2.5% of natural lutetium. [ 7 ]
Lutetium (177 Lu) vipivotide tetraxetan, sold under the brand name Pluvicto, is a radiopharmaceutical medication used for the treatment of prostate-specific membrane antigen (PSMA)-positive metastatic castration-resistant prostate cancer (mCRPC). [5] [6] Lutetium (177 Lu) vipivotide tetraxetan is a targeted radioligand therapy. [6] [8]
Radiation from lutetium (177 Lu) oxodotreotide can cause damage when the medicine passes through tubules in the kidney. [45] Arginine/lysine can be used to reduce renal radiation exposure during peptide receptor radionuclide therapy with lutetium ( 177 Lu) oxodotreotide.
A nuclear isomer is a metastable state of an atomic nucleus, in which one or more nucleons (protons or neutrons) occupy excited state levels (higher energy levels). ). "Metastable" describes nuclei whose excited states have half-lives 100 to 1000 times longer than the half-lives of the excited nuclear states that decay with a "prompt" half life (ordinarily on the order of 10