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New research shows that a novel positron emission tomography (PET) tracer that targets inflammation is safe and can clearly identify early stages of rheumatoid arthritis. The promising PET tracer, 68Ga-DOTA-Siglec-9, rapidly clears from blood circulation, has a low radiation dose, and can be easily produced. This first-in-human study was published in the April issue of the Journal of Nuclear Medicine.

Inflammation is a significant part of several chronic diseases, including rheumatoid arthritis and its related issues. While PET imaging with 18F-FDG is a valuable tool for the diagnosis and monitoring of the effects of treatments, it is not specific enough to assess inflammation.

It's important to detect inflammation early so that patients can receive the best treatment. Our institution has worked for several years to develop an imaging agent that targets areas of inflammation, and in this study, tested its effectiveness in humans for the first time."

Anne Roivainen, PhD, advair discount cheap generic Professor of Preclinical Imaging and Drug Research, Turku PET Centre, University of Turku and Turku University Hospital in Finland

To evaluate the radiotracer's safety and biodistribution characteristics, six healthy study participants underwent whole body 68Ga-DOTA-Siglec-9 PET/computed tomography scans. 68Ga-DOTA-Siglec-9 was well-tolerated and cleared quickly from the blood, and its radiation dose was similar to other 68Ga tracers. In one additional study participant with rheumatoid arthritis, the tracer was able to clearly detect joints with arthritis.

"We have proven that the characteristics of 68Ga-DOTA-Siglec-9 are favorable for use in patient imaging studies," remarked Roivainen. "Future studies will clarify whether 68Ga-DOTA-Siglec-9 PET imaging has the potential to detect other inflammatory diseases early. It could also help to evaluate the effectiveness of treatments and promptly identify patients who are unlikely respond to therapy."

Source:

Society of Nuclear Medicine and Molecular Imaging

Journal reference:

Viitanen, R., et al. (2021) First-in-Humans Study of 68Ga-DOTA-Siglec-9, a PET Ligand Targeting Vascular Adhesion Protein 1. Journal of Nuclear Medicine. doi.org/10.2967/jnumed.120.250696.

Posted in: Medical Science News | Medical Research News | Medical Condition News

Tags: Arthritis, Blood, Chronic, Computed Tomography, CT, Heart, Hospital, Imaging, Immunology, Inflammation, Laboratory, Ligand, Medicine, Molecular Imaging, Nuclear Medicine, Oncology, Positron Emission Tomography, Preclinical, Preclinical Imaging, Protein, Radiology, Radiotherapy, Research, Rheumatoid Arthritis, Rheumatology, Theranostics, Tomography, Vascular

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