Clinical trial NCT06168487: Telmisartan in Prostate Cancer
Official title: Phase I Non-Randomized, Unblinded, Single-Center Trial of Oral Telmisartan Alone or Combined With Selected Standard of Care Therapies for Prostate Cancer
Study type: INTERVENTIONAL
Overall status: RECRUITING
Phase: EARLY_PHASE1
Conditions: Prostate Cancer
Lead sponsor: Dartmouth-Hitchcock Medical Center
Sponsor class: OTHER
First posted: 2023-12-13
Enrollment: 36
Sex: MALE
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: NON_RANDOMIZED
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: The goal of this clinical trial is to learn about the tolerability of telmisartan in patients with prostate cancer.

Detailed description: The primary objective of this study is to test the tolerability of oral telmisartan given as a single agent or combined with specific standard of care agents in selected participants with PC. Patients will be defined as tolerating telmisartan if they maintain systolic blood pressure \>110 mm Hg and are without greater than grade 2 toxicities as defined in the Common Terminology Criteria for Adverse Events v5.1 for at least 60 days total telmisartan treatment.

Eligibility criteria: Inclusion Criteria:

* Participants must be ≥18 years of age.
* Participants must be able and willing to provide informed consent or have a surrogate capable of providing same.
* Participants must not require immediate change in SOC treatment, i.e., patients with stable PSA (do not meet PCWG310 criteria for PSA progression), or with rising PSA but they remain on SOC treatment (defined as having met PCWG3 criteria for PSA progression, but do not have clinical/radiographic progression and have not met criteria for an immediate change in therapy based on PSA doubling time) as determined by their primary oncologist
* Participants must be receiving or likely to receive one of the following SOC agents for PC:

cabazitaxel, docetaxel (alone or plus abiraterone) olaparib, rucaparib, or talazoparib plus enzalutamide

* Participants must have
* ECOG performance status of 0-2
* Adequate hepatic (SCOT ≤3x ULN) and renal function (serum creatinine ≤2.5 or estimated GFR \>30 cc/min)
* Standing systolic blood pressure \>/= 110mm Hg
* If not on active surveillance, patient mut have castrate level testosterone
* No contraindication to telmisartan, including ACE inhibitor use in the 6 weeks prior to projected telmisartan start on trial
* All participants must have a systolic blood pressure \>110 mm Hg during study enrollment assessment and throughout the study
* If participants are concurrently treated for hypertension, they must be able to allow telmisartan in addition to, or replacing their antihypertensive regimen
* Participants must be able to withstand planned research phlebotomies (Hb \>10 gm/dl).
* Participants must have a blood prostate specific antigen \> 1 ng/ml at study entry using the Roche Cobas immunoassay.
* Participants must be able to take or have taken their own blood pressure per the study protocol (daily during telmisartan escalation and for two weeks after the final escalation and weekly thereafter for the following month and then monthly) if normotensive at enrollment.

Exclusion Criteria:

Participants who fall into one of the following categories will NOT be eligible for this study:

* Angiotensin l receptor blocker use currently or within the 30 days prior to day 1, cycle 1.
* Patients with hypertensive urgency or emergency as defined in N Engl J Med. 2019 Nov 7;381(19):1843-1852. doi:10.1056/NEJMep1901117
* Patients who are incarcerated or homeless
* Patients who are receiving PC-specific treatment aside from cabazitaxel, docetaxel, olaparib, rucaparib, abiraterone or talazoparib plus enzalutamide or have plans to undergo the same during the study period, except local irradiation therapy to PC lesions.
* Patients on lithium therapy in any form
* Patients who received rituximab or amifostine within 30 days prior to first telmisartan dose on this study
* Patients on ramapril
* Patients on digoxin who do not consent to monthly digoxin blood level testing

Primary outcomes:
measure: Tolerability of oral telmisartan
timeFrame: 12 months
Secondary outcomes:
measure: Increase in tumor DNA damage
timeFrame: 24 months
Other outcomes:
measure: Reduction of blood prostate specific antigen
timeFrame: 24 months
Locations:
city: Lebanon
country: United States
facility: Dartmouth Health
state: New Hampshire
Study officials:
affiliation: Dartmouth Health
name: Rodwell Mabaera, MD
role: PRINCIPAL_INVESTIGATOR
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