A target tissue can be treated with a radioisotope. Some methods for treating a target tissue with a radioisotope include determining a distance between a target tissue and a surface of a matrix material to be positioned adjacent the target tissue and, based on the determined distance, determining an activity to be mixed with the matrix material to obtain a desired activity concentration. Some methods further include mixing the radioisotope with the matrix material. In some embodiments, the matrix material comprises bone cement, and the target tissue is a tumor in a bone. The radioisotope may be a beta-emitting radioisotope mixed in the cement at a concentration to form a radioactive cement.

Disclosed are methods, compositions of matter, and protocols useful for the detection of altered cells in a patient. Immune cells capable of clonal expansion are engineered to produce a soluble signal upon activation and/or clonal expansion. The cells may possess a suicide gene, inducible upon administration pharmacological or light/radiation activatable, so as to eliminate the cells from body when desired. In another embodiment, immune cells produce a localized marker, the marker being visible with imaging technology. In other embodiments cells capable of non-clonal expansion are utilized. The disclosure provides means of utilizing the immunosurveillance properties of immune cells to diagnose and localize diseases associated with alteration of host cells.

Among the various aspects of the present disclosure is the provision of compositions and methods for targeted treatment and imaging of cancers or tumors.

A method for labeling exosomes with a radioactive substance using an amine group on surfaces of the exosomes includes providing a cell-derived exosome, treating a surface of the exosome with N-hydroxysuccinimide-azadibenzocyclooctyne (NHS-ADIBO), and mixing the treated exosome with N3-introduced chelator-radioactive substance to conduct a reaction between the chelator and an amine group present on the surface of the exosome, wherein the radioactive substance is introduced inside the exosome by the above reaction. The exosomes can be stably labeled at high labeling efficiency, and the exosomes can be favorably used as an agent for nuclear medicine imaging and therapeutic imaging for confirming the biological distribution of exosomes and whether the exosomes move to target organs and target diseases in animals including a human being.

The present invention is directed generally to eukaryotic cells comprising single-celled organisms that are introduced into the eukaryotic cell through human intervention and which transfer to daughter cells of the eukaryotic cell, and methods of introducing such single-celled organisms into eukaryotic cells. The invention provides single-celled organisms that introduce a phenotype to eukaryotic cells that is maintained in daughter cells. The invention additionally provides eukaryotic cells containing magnetic bacteria. The invention further provides eukaryotic cells engineered with single-celled organisms to allow for multimodal observation of the eukaryotic cells. Each imaging method (or modality) allows the visualization of different aspects of anatomy and physiology, and combining these allows the imager to learn more about the subject being imaged.

A target tissue can be treated with a radioisotope. Some methods for treating a target tissue with a radioisotope include determining a distance between a target tissue and a surface of a matrix material to be positioned adjacent the target tissue and, based on the determined distance, determining an activity to be mixed with the matrix material to obtain a desired activity concentration. Some methods further include mixing the radioisotope with the matrix material. In some embodiments, the matrix material comprises bone cement, and the target tissue is a tumor in a bone. The radioisotope may be a beta-emitting radioisotope mixed in the cement at a concentration to form a radioactive cement.

Provided herein are systems and methods for radiolabeling of recombinant Adeno-Associated Virus (rAAV) with radioactive iodine. Also provided are methods for in vivo imaging and treatment using the radiolabeled rAAV.

Methods of radiolabeling of cell surface glycans for in vivo cell tracking and imaging as well as populations of radiolabeled cells and uses thereof are disclosed.

The invention provides a method of preparing a .sup.89Zr-oxine complex of the formula. The invention also provides a method of labeling a cell with the .sup.89Zr-oxine complex and a method for detecting a biological cell in a subject comprising administering the .sup.89Zr-oxine complex to the subject.

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A method for preparing a labeling agent includes: providing a compound including a chelating moiety and a conjugation moiety; contacting the compound with a radionuclide to create a radiolabeled preparation having a first molar activity; and purifying the radiolabeled preparation to prepare a labeling agent having a second molar activity that is greater than the first molar activity. A biological material can be contacted with a labeling agent prepared by the method such that the biological material becomes labeled for imaging. In one example embodiment, there is provided a way of synthesizing a labeling agent, such as .sup.89Zr-labeled p-isothiocyana to-benzyl-desferrioxamine, using a purification step that results in increased molar activity and labeling efficiency, which makes possible the successful labeling of biological materials at very low concentrations where an unpurified labeling agent would be unsuccessful.