SynthesisEuropean journal of nuclear medicine and molecular imaging2025
Advancements in non-invasive visualization of the immune checkpoint TIGIT: a systematic review.
Synthesis in European journal of nuclear medicine and molecular imaging, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
6 authors.
Funding
Abstract
purposeT cell immunoglobulin and immunoreceptor tyrosine-based inhibitory motif domain (TIGIT) is a novel immune checkpoint receptor implicated in tumor immune evasion. Non-invasive imaging of TIGIT expression holds potential for improving patient selection and monitoring in cancer immunotherapy. This systematic review aims to evaluate recent advancements in radiotracer development for non-invasive visualization of TIGIT.
methodsA comprehensive literature search was conducted up to February 2025 using databases including PubMed and Web of Science. The search terms "TIGIT imaging", "TIGIT PET", "TIGIT SPECT", and "TIGIT visualization" were used, focusing on those reporting on the development, characterization, or application of immuno-PET tracers targeting TIGIT expression. Both preclinical and clinical studies were reviewed.
resultsSix studies met the inclusion criteria, exploring tracers targeting TIGIT expression on immune cells. These studies have focused on the development of TIGIT-targeted imaging agents, including radiolabeled antibodies, peptides, and nanobodies for positron emission tomography (PET) and single-photon emission tomography (SPECT) imaging. These agents demonstrated high specificity and enabled visualization of TIGIT expression in preclinical models and one exploratory clinical study.
conclusionNovel radiotracers for non-invasive imaging of TIGIT show potential for enhancing personalized cancer immunotherapy. TIGIT-targeted imaging agents allow for the visualization and quantification of TIGIT expression in tumors/tumor microenvironment, which in future might contribute to better patient selection and treatment monitoring. Further research and clinical validation are necessary to optimize these imaging techniques for routine clinical application.
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