CETO First in Human Trial
- Conditions
- Primary Aldosteronism
- Interventions
- Combination Product: [18F]CETO
- Registration Number
- NCT04529018
- Lead Sponsor
- University of Cambridge
- Brief Summary
The study is a Phase 1, single-centre, open label, micro-dosing study. The aim is to investigate an innovative new tracer, \[18F\]CETO, as a potential alternative to adrenal vein sampling for the lateralisation of primary aldosteronism (PA).
- Detailed Description
At least one-quarter of the UK adult population has hypertension, a major risk factor for heart attacks and stroke. Primary aldosteronism (PA), a treatable form of hypertension, accounts for 5-10% of all cases, and 20-25% of difficult to control hypertension. It is challenging to determine whether one adrenal gland is the source of PA (which is potentially curable with surgery) or both glands (which would require long-term drug treatment). Existing lateralising procedures (i.e. investigations to distinguish one from two gland involvement e.g. CT or MRI scan) have significant limitations. Accordingly, most patients must undergo an invasive procedure called adrenal vein sampling (AVS) in which small catheters are placed in each adrenal vein. However, this is time-consuming, technically demanding, and fails in 20-50% of cases. To address this, researchers have adopted a novel approach using PET-CT as an alternative to AVS. Currently, this uses a tracer called metomidate labelled with carbon-11 (11C MTO), which is taken up preferentially by the adrenal gland, and in particular by adrenal tumours causing PA. However, its utility is limited by a short half-life, which means the scan can only be performed in centres with a cyclotron facility (currently less than 10 NHS sites). The aim of this study is to investigate the safety of a new tracer with a longer half-life, \[18F\]CETO, that could be made available for use in many more centres.
The trial objectives are outlined below:
Primary Objective
To evaluate the safety of up to two administrations of \[18F\]CETO in up to 6 patients with primary aldosteronism and 5 healthy volunteers.
Secondary Objective
* Assess \[18F\]CETO uptake by the adrenal glands
* Evaluate uptake in bilateral vs unilateral cases of PA following \[18F\]CETO administration in up to 6 patients.
Recruitment & Eligibility
- Status
- UNKNOWN
- Sex
- All
- Target Recruitment
- 11
Not provided
All participants:
- allergy to radiographic contrast agents
- allergy or contraindication to synacthen
- pregnancy, breastfeeding, or the intention to become pregnant during the 6 months following trial participation
- positive pregnancy test at the screening or baseline visits
- assessed by the investigator as being unable or unwilling to comply with the requirements of the study protocol.
- receipt of another IMP as part of a CTIMP
- prior radiation exposure as part of previous research studies
- recreational drug use, or substance/alcohol dependency
- clinically abnormal screening blood tests.
Additional exclusion criteria for healthy volunteers:
- women of child-bearing potential (i.e. fertile, following menarche and until becoming post-menopausal unless permanently sterile)
- exposure to radiation during their work
- received more than 10 mSv of radioactivity in the past 12 months
- any subject with a history of adrenal disease or who, at the screening visit, reports symptoms, or exhibits physical signs, that could be consistent with previously unsuspected adrenal disease
Additional exclusion criteria for patients:
- allergy or contraindication to dexamethasone treatment (or lactose intolerant)
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Healthy Volunteers [18F]CETO A group of 5 healthy volunteers will be tested with the PET radiotracer \[18F\]CETO to assess safety of tracer administration, and evaluate uptake by the normal adrenal glands. Patients with primary aldosteronism [18F]CETO A group of 6 patients with Primary Aldosteronism (3 with unilateral and 3 with bilateral disease) will be tested with up to two administrations of the PET radiotracer \[18F\]CETO, to assess safety of tracer administration, evaluate the ability of \[18F\]CETO to distinguish between unilateral and bilateral cases of PA, and determine the effect of Dexamethasone in improving the quality of PET-CT images acquired following administration.
- Primary Outcome Measures
Name Time Method Safety of [18F]CETO administration 6 months The primary outcome measure is the overall safety of \[18F\]CETO. This will be assessed according to the frequency of adverse events, serious adverse events, clinically significant changes in vital signs, ECG and laboratory parameters.
- Secondary Outcome Measures
Name Time Method [18F]CETO uptake by the the adrenal glands. 6 months \[18F\]CETO uptake by the adrenal glands will be assessed by measurement of Standardized Uptake Values (SUV) over the left and right adrenal glands. All assessments will be performed by a dedicated blinded reviewer.
To evaluate uptake in bilateral versus unilateral cases of PA following [18F]CETO administration in up to 6 patients. 6 months Evaluation of adrenal uptake of \[18F\]CETO in bilateral versus unilateral cases of PA will be performed by comparing SUV values of both adrenal glands in three patients with each subtype of PA (using a dedicated blinded reviewer).
Trial Locations
- Locations (1)
Addenbrooke' Hospital
🇬🇧Cambridge, Cambridgeshire, United Kingdom