Imaging angiogenesis in patients with head and neck squamous cell carcinomas by [68Ga]Ga-DOTA-E-[c(RGDfK)]2 PET/CT

D. Lobeek*, M. Rijpkema, S. Y.A. Terry, J. D.M. Molkenboer-Kuenen, L. Joosten, E. A.J. van Genugten, A. C.H. van Engen-van Grunsven, J. H.A.M. Kaanders, S. A.H. Pegge, O. C. Boerman, W. L.J. Weijs, M. A.W. Merkx, C. M.L. van Herpen, R. P. Takes, E. H.J.G. Aarntzen, W. J.G. Oyen

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

    1 Citation (Scopus)

    Abstract

    Purpose: Angiogenesis plays an important role in the growth and metastatic spread of solid tumours and is characterised by the expression of integrins on the cell surface of endothelial cells. Radiolabelled RGD peptides specifically target angiogenesis-related αvβ3 integrins, expressed on the activated endothelial cells of sprouting blood vessels. Here, we validated the feasibility of 68Ga[Ga]-DOTA-E-[c(RGDfK)]2 (68Ga-RGD) PET/CT to visualise angiogenesis in patients with oral squamous cell carcinoma (OSCC). Methods: Ten patients with OSCC and scheduled for surgical resection including elective neck dissection received an intravenously administration of 68Ga-RGD (42 ± 8 μg; 214 ± 9 MBq). All patients subsequently underwent dynamic (n = 5) or static PET/CT imaging (n = 5) for 60 min or for 4 min/bed position at 30, 60 and 90 min after injection, respectively. Quantitative tracer uptake in tumour lesions was expressed as standardised uptake values (SUV). Additionally, tumour tissue was immunohistochemically stained for αvβ3 integrin to assess the expression pattern. Results: 68Ga-RGD tumour accumulation was observed in all patients. At 60 min post injection, tumour SUVmax ranged between 4.0 and 12.7. Tracer accumulation in tumour tissue plateaued at 10 min after injection. Uptake in background tissue did not change over time, resulting in tumour-to-muscle tissue of 6.4 ± 0.7 at 60 min post injection. Conclusions: 68Ga-RGD PET/CT of αvβ3 integrin expression in OSCC patients is feasible with adequate tumour-to-background ratios. It will provide more insight in angiogenesis as a hallmark of the head and neck squamous cell carcinomas’ tumour microenvironment. Trial registration: https://eudract.ema.europa.eu no. 2015-000917-31

    Original languageEnglish
    Pages (from-to)2647-2655
    Number of pages9
    JournalEuropean journal of nuclear medicine and molecular imaging
    Volume47
    Issue number11
    DOIs
    Publication statusPublished - 1 Oct 2020

    Keywords

    • Angiogenesis
    • Head and neck cancer
    • RGD-PET/CT
    • Squamous cell carcinoma
    • αβ integrin

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