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Semi-quantitative Assessment Using [18F]FDG Tracer in Patients with Severe Brain Injury
Published on: November 9, 2018
68 Ga-Trivehexin PET/CT in Metastatic Non-Small Cell Lung Cancer to the Brain
Fahad Marafi1, Abdulredha A Esmail2, Mahmoud A Alfeeli1
1From the Department of Nuclear Medicine, Jaber Al Ahmed Center of Molecular Imaging.
Abstract:
In the era of molecular imaging and eager to study tumor tissues' microenvironment with noninvasive means, the search and development of new radiotracer targeted molecule continue. αvβ6-Integrin is a heterodimeric glycoprotein transmembrane receptor that is unique in that it is expressed exclusively in epithelial cells. It is upregulated in varieties of carcinomas such of the lung, breast, and colon. It plays a role in facilitating invasion, inhibiting apoptosis, regulating expression of matrix metalloproteases, and activating TGF-β in carcinoma. Expression of αvβ6 indicates poor prognosis and can help in development of targeted therapy. 68 Ga-Trivehexin has affinity of 85%-88% of this integrin.
Insights
New radiotracers are crucial for noninvasive molecular imaging of tumor microenvironments. Alpha-v-beta-6 integrin (αvβ6) is a promising target, as 68Ga-Trivehexin shows high affinity for this cancer-associated molecule.
Area of Science:
- Oncology
- Molecular Imaging
- Biochemistry
Background:
- The tumor microenvironment is critical for cancer progression and therapeutic response.
- Alpha-v-beta-6 integrin (αvβ6) is upregulated in various carcinomas, correlating with poor prognosis.
- αvβ6 plays key roles in cancer invasion, apoptosis resistance, and matrix remodeling.
Purpose of the Study:
- To identify and develop novel radiotracers for noninvasive molecular imaging of tumor tissues.
- To investigate the potential of targeting αvβ6 integrin for cancer diagnosis and therapy.
Main Methods:
- Exploration of targeted molecules for molecular imaging.
- Assessment of radiotracer affinity for specific molecular targets.
Main Results:
- Alpha-v-beta-6 integrin (αvβ6) is a transmembrane receptor exclusively expressed in epithelial cells.
- 68Ga-Trivehexin demonstrates a high binding affinity (85%-88%) for the αvβ6 integrin.
Conclusions:
- Targeting αvβ6 integrin represents a promising strategy for developing novel cancer therapies.
- 68Ga-Trivehexin shows potential as a radiotracer for imaging αvβ6-expressing tumors.
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