Adoptive T cell therapy (ACT) with tumor infiltrating lymphocytes (TIL), T cell receptor (TCR) and Chimeric Antigen Receptor (CAR) engineered T cells, or hematopoietic stem cell transplantation, is a promising new approach to cancer treatment. ACT harnesses an individual's adaptive immune system to fight against cancer, with fewer side-effects and more specific anti-tumor activity. Despite their promise of ACT as curative, these therapies are often limited by the persistence and robustness of the responses of the T cells to the cancer cells.

High expression of CD47, a cell surface receptor on several types of cancer cells, has been identified as a ‘don’t eat me signal’ that inhibits their killing by macrophages or NK cells. Conversely, the CD47 antibody B6H12 that blocks SIRPα binding enhances macrophage-dependent clearance of tumors in several mouse models, although others have shown that such clearance can be independent of SIRPα signaling.

This technology from the NCI Molecular Imaging Program relates to a Zirconium-89 (89Zr)-oxine complex for cell labeling, tracking of labeled cells by whole-body positron emission tomography/computed tomography (PET/CT) imaging, and associated methods. A long half-life of 89Zr (78.4 hours), high sensitivity of PET, and absence of background signal in the recipient enable tracking cells over a week using low levels of labeling radioactivity without causing cellular toxicity.

The NCI Radiation Oncology Branch and the  NHLBI Laboratory of Single Molecule Biophysics seek parties to co-develop fluorescent  nanodiamonds for use as in vivo and in vitro optical tracking probes toward commercialization.  

Chronic leg ulcers are a debilitating vasculopathic complication for some patients with sickle cell disease (SCD). Prevalence of leg ulcers varies based on age and geographic location; about 5-10% of all SCD patients may suffer leg ulcers. These leg ulcers are painful, result in infections, hospitalization, disability, and negatively impact the patient’s social and psychological wellbeing on an ongoing basis.