An Experimental Study of Belzutifan Impact on Catecholamine Metabolism

Official title

An Experimental Pilot Study to Investigate Changes in Catecholamine Synthesis and Metabolism in Patients With Molecularly Profiled Phaeochromocytoma and Paraganglioma Taking Belzutifan

Overview

To investigate the impact of a medication called Belzutifan on the production and subsequent metabolism of adrenaline and noradrenaline collectively termed 'catecholamines'. The study aims to identify changes in the production and metabolism of catecholamines by measuring the substance which starts the chain of catecholamine metabolism called tyrosine in patients before, during and after 5 days of taking Belzutifan 120mg daily.

Detailed description

This is a single centre, single arm, pilot interventional study aimed at identifying alterations in catecholamine synthesis and metabolism in 12 patients taking Belzutifan 120mg daily for five days. As this is a pilot and experimental study of a rare disease, sample size was not calculated. A study recruitment target of 12 patients was established based on the annual incidence of patients with catecholamine secreting PPGL attending our national referral centre.

There is an estimated annual incidence of 100-150 patients across all of England and an annual incidence of 15-20 patients attending Cambridge University Hospital per year.

The study protocol is 14 days. All patients will be recruited by the PI after informed consent and review of the study inclusion and exclusion criteria.

Germline genetic results performed as part of routine clinical care will be recorded for all patients. For those patients with negative germline genetic test results, tumour sequencing of available tissue or tumour tissue later removed (after the end of the study protocol) during surgery will be performed to investigate for somatic variants (genetic changes unique to the tumour cells) in specific genes which may influence how Belzutifan impacts catecholamine synthesis and metabolism.

The study protocol is 14 days including five days of intervention with Belzutifan 120mg daily for all patients. Baseline plasma tyrosine and plasma metanephrines will be performed on all patients (day 0) and at several time points after starting Belzutifan 120mg daily to examine for alterations in catecholamine metabolism. Recruited patients will attend daily for seven days and again on day 10 and day 14 and will be reviewed by the PI.

Plasma tyrosine and metanephrines will be performed using specific published research methods (liquid chromatography mass spectroscopy) and a percentage reduction in catecholamine metabolites and a percentage increase in tyrosine will be calculated for every patient at the end of the 14-day protocol.

Safety measures will include monitoring of full blood count, liver function tests and by measuring blood pressure and heart rate at baseline and at day 1-7, day 10 and day 14 in all patients recruited to the study.

Any changes in blood pressure during the study protocol will be reviewed by the PI and all changes to existing medications will be performed by the PI and recorded.

All recruited patients will be interviewed daily from day 0 to day 7 and again on day 10 and day 14 and all symptoms reported will be recorded by the PI.

Interventions

• Drug Belzutifan
  Belzutifan 120mg daily for 5 days

Primary outcome measures

• Tyrosine measurements [Time frame: Baseline, day 5 and day 14]

Secondary outcome measures (1)

• Plasma metanephrine measurements [Time frame: Baseline, day 5 and day 15]

Eligibility criteria

Inclusion criteria

• Adult patients > 18 years
• Patients must have a biochemically confirmed diagnosis of a phaeochromocytoma or paraganglioma using plasma metanephrines or 24- hour urinary metanephrines and plasma or urinary metanephrines should be at least 1.5 times the upper limit of the normal reference range.
• Female patients of child-bearing potential must have a negative serum pregnancy test result within 3 days before first administration of study drug
• Able to provide informed consent

Exclusion criteria

• Has hypoxia, or requires intermittent supplemental oxygen, or requires chronic supplemental oxygen.
• Has clinically significant cardiac disease, including unstable angina, acute myocardial infarction, percutaneous transluminal coronary angioplasty (PTCA), or coronary artery bypass graft surgery (CABG) ≤6 months from Day 1 of study drug administration, or New York Heart Association Class III or IV congestive heart failure. Medically controlled arrhythmia stable on medication is permitted.
• Has a co-existing malignancy (in addition to PPGL)
• Has a Hb < 100g/dL
• Is on medications which may interfere with belzutifan pharmacokinetics and that cannot be stopped for the duration of the study and for 7 days after the study period (everolimus, omeprazole, esomeprazole, Fluconazole, fluoxetine, Voriconazole, Sirolimus)
• Has a known diagnosis of HIV, hepatitis B or hepatitis C

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

N/A

Model

Single group

Masking

Open label

Primary purpose

Treatment

Study locations

United Kingdom · 1 center

• Cambridge University Hospitals NHS Foundation Trust — Cambridge

Publications

• Lenders JW, Duh QY, Eisenhofer G, Gimenez-Roqueplo AP, Grebe SK, Murad MH, Naruse M, Pacak K, Young WF Jr; Endocrine Society. Pheochromocytoma and paraganglioma: an endocrine society clinical practice guideline. J Clin Endocrinol Metab. 2014 Jun;99(6):1915-42. doi: 10.1210/jc.2014-1498. PMID 24893135
• Tufton N, Gunganah K, Hussain S, Druce M, Carpenter R, Ashby M, Drake WM, Akker SA. Alpha blockade-not to be underdone. Clin Endocrinol (Oxf). 2017 Feb;86(2):306-308. doi: 10.1111/cen.13262. Epub 2016 Nov 21. No abstract available. PMID 27761935
• Buffet A, Burnichon N, Favier J, Gimenez-Roqueplo AP. An overview of 20 years of genetic studies in pheochromocytoma and paraganglioma. Best Pract Res Clin Endocrinol Metab. 2020 Mar;34(2):101416. doi: 10.1016/j.beem.2020.101416. Epub 2020 Mar 10. PMID 32295730
• Winzeler B, Tufton N, S Lim E, Challis BG, Park SM, Izatt L, Carroll PV, Velusamy A, Hulse T, Whitelaw BC, Martin E, Rodger F, Maranian M, Clark GR, A Akker S, Maher ER, Casey RT. Investigating the role of somatic sequencing platforms for phaeochromocytoma and paraganglioma in a large UK cohort. Clin Endocrinol (Oxf). 2022 Oct;97(4):448-459. doi: 10.1111/cen.14639. Epub 2021 Dec 6. PMID 34870338
• Winzeler B, Challis BG, Casey RT. Precision Medicine in Phaeochromocytoma and Paraganglioma. J Pers Med. 2021 Nov 22;11(11):1239. doi: 10.3390/jpm11111239. PMID 34834591
• Nazari MA, Hasan R, Haigney M, Maghsoudi A, Lenders JWM, Carey RM, Pacak K. Catecholamine-induced hypertensive crises: current insights and management. Lancet Diabetes Endocrinol. 2023 Dec;11(12):942-954. doi: 10.1016/S2213-8587(23)00256-5. Epub 2023 Nov 6. PMID 37944546
• Gruber LM, Jasim S, Ducharme-Smith A, Weingarten T, Young WF, Bancos I. The Role for Metyrosine in the Treatment of Patients With Pheochromocytoma and Paraganglioma. J Clin Endocrinol Metab. 2021 May 13;106(6):e2393-e2401. doi: 10.1210/clinem/dgab130. PMID 33693908
• Casey RT, Challis BG, Pitfield D, Mahroof RM, Jamieson N, Bhagra CJ, Vuylsteke A, Pettit SJ, Chatterjee KC. Management of an acute catecholamine-induced cardiomyopathy and circulatory collapse: a multidisciplinary approach. Endocrinol Diabetes Metab Case Rep. 2017 Nov 9;2017:17-0122. doi: 10.1530/EDM-17-0122. eCollection 2017. PMID 29147570

Identifiers

NCT: NCT07680205 · A097464 · REC reference: 25/PR/1644

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗