68 Ga-Trivehexin PET/CT in Metastatic Non-Small Cell Lung Cancer to the Brain.

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.