SSTR2 Imaging With [68Ga]Ga-DOTA-TOC PET/CT in NPC
ConditionNasopharyngeal Carcinoma (NPC)
Trial statusRecruiting
Trial phasePhase 1, Phase 2
Trial typeInterventional
Biological sexAll
Age18+
SponsorUniversity Medical Center Groningen
About this trial
This is an investigator-initiated, single-center clinical trial designed to evaluate the feasibility of \[68Ga\]Ga-DOTA-TOC positron emission tomography (PET) scan in patients with Epstein-Barr virus (EBV) related nasopharyngeal carcinome (NPC) prior to and three weeks after the start of induction chemotherapy or concurrent chemoradiotherapy (CRT). Archival tumor tissue from the diagnostic biopsy will be used to perform somatostatin receptor 2 (SSTR2) immunohistochemistry (IHC). Blood samples will be drawn at baseline, after three weeks, after completion of induction chemotherapy if applicable, and after CRT.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Stage IB-IVA NPC (AJCC 9th edition), EBV positive determined by Epstein-Barr virus-encoded RNA (EBER).
Planned treatment with induction chemotherapy or CRT without induction chemotherapy.
Age ≥ 18 years.
Signed informed consent.
Disqualifiers
Previous treatment with chemotherapy or radiotherapy for NPC.
Treatment with any investigational agent or participation in another clinical trial with therapeutic intent within 28 days prior to [68Ga]Ga-DOTA-TOC injection.
Any other diseases, metabolic dysfunction, physical examination finding, or clinical laboratory finding giving reasonable suspicion of a disease or that may affect the interpretation of the results or render the patient at high risk from complications.
Altered mental status, or any psychiatric condition that would prohibit the understanding or rendering of informed consent.
Trial design
Design model
Single group
Treatments tested in this trial
[68Ga]Ga-DOTA-TOC PET imaging
Other interventionPatients will undergo \[68Ga\]Ga-DOTA-TOC PET imaging before and 3 weeks after start of standard of care treatment with induction chemotherapy or CRT, unless the baseline scan shows no tracer uptake in the tumor, in that case the scan will not be repeated. Patients will receive 120 MBq \[68Ga\]Ga-DOTA-TOC intravenously and will be scanned up to 20 minutes, 60 minutes after tracer injection, after acquisition of a low dose CT for attenuation correction. The investigators will use archival tissue of the diagnostic biopsy for SSTR2 staining. If there is not sufficient tumor tissue available, a new biopsy will be performed after the baseline PET scan. Blood samples will be drawn before the start, during and after finishing therapy at 3 or 4 different time points, depending on the treatment schedule.
Treatment groups
10 Participants
are divided into 1 treatment groupGroup A: [68Ga]Ga-DOTA-TOC PET imagingExperimental treatment 1 intervention
Trial outcomes
Primary outcomes
1
Feasibility of assessing tumor SSTR2 expression
Determine feasibility of assessing tumor SSTR2 expression in patients with EBV-associated NPC in a non-endemic region by repeat \[68Ga\]Ga-DOTA-TOC PET imaging.
Time frame
From the day of the first study scan within one week before the start of treatment to the day of the second study scan three weeks after the start of treatmentSecondary outcomes
1
[68Ga]Ga-DOTA-TOC uptake in the primary tumor and lymph node metastase
Determine \[68Ga\]Ga-DOTA-TOC uptake in the primary tumor and lymph node metastases in patients with EBV-related NPC, at baseline and early after the start of curative intent treatment, consisting of CRT with or without induction chemotherapy.
Time frame
From the day of the first study scan within one week before the start of treatment to the day of the second study scan three weeks after the start of treatment2
[68Ga]Ga-DOTA-TOC distribution
Normal tissue and organ distribution of \[68Ga\]Ga-DOTA-TOC in NPC patients defined by standard uptake value (SUV)
Time frame
From the day of the first study scan within one week before the start of treatment to the day of the second study scan three weeks after the start of treatment3
Comparison [68Ga]Ga-DOTA-TOC uptake with SSTR expression
Comparison of tumor \[68Ga\]Ga-DOTA-TOC uptake on the baseline study PET scan with SSTR2 expression on the tumor biopsy, determined by IHC.
Time frame
The day of the first study scan within one week before the start of treatmentSponsors and contacts
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Source ClinicalTrials.gov