FK506 (Tacrolimus) in Pulmonary Arterial Hypertension

Completed · Phase 2 · Has a placebo group

Conditions studied: Pulmonary Arterial Hypertension

In brief

Mutations in bone morphogenetic protein receptor 2 (BMPR2) are present in \>80% of familial and \~20% of sporadic pulmonary arterial hypertension (PAH) patients. Furthermore dysfunctional BMP signaling is a general feature of pulmonary hypertension even in non-familial PAH. We therefore hypothesized that increasing BMP signaling might prevent and reverse the disease. We screened \> 3500 FDA approved drugs for their propensity to increase BMP signaling and found FK506 (Tacrolimus) to be a strong activator of BMP signaling. Tacrolimus restored normal function of pulmonary artery endothelial cells, prevented and reversed experimental PAH in mice and rats. Given that Tacrolimus is already FDA approved with a known side-effect profile, it is an ideal candidate drug to use in patients with pulmonary arterial hypertension. The aims of our trial are: 1. Establish the Safety of FK506 in patients with PAH. 2. Evaluate the Efficacy of FK506 in PAH 3. Identify ideal candidates for future FK506 phase III clinical trial.

Key facts

Study ID

NCT01647945

Run by

Edda Spiekerkoetter

People needed

23

Starts

2012-07-01

Expected to finish

2014-08-01

Last updated by the study team

2016-10-05

Who can join

Age: 18 and older, up to 70. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Age ≥ 18 and < 70 years
• Diagnosis of WHO Group I Pulmonary Arterial Hypertension (PAH) (Idiopathic (I)PAH, Heritable PAH (including Hereditary Hemorrhagic Telangiectasia), Associated (A)PAH (including collagen vascular disorders, drugs+toxins exposure, congenital heart disease, and portopulmonary disease).
• Stable on active PAH treatment including any prostacycline or phosphodiesterase inhibitors and the endothelin antagonist Ambrisentan alone or in combination (stability defined as: <10% change in 6MWD, no change in NYHA class, no hospitalization or addition of PAH therapy for at least 3 months).
• Previous Right Heart Catheterization that documented:
• Mean PAP ≥ 25 mmHg.
• Pulmonary capillary wedge pressure < 15 mmHg.
• Pulmonary Vascular Resistance ≥ 3.0 Wood units or 240 dynes/sec/cm5
• WHO functional class I to IV as judged by the investigator.

You may not qualify if…

• WHO Group II - V Pulmonary Hypertension.
• Current or prior experimental PAH treatments within the last 6 months (including but not limited to tyrosine kinase inhibitors, rho-kinase inhibitors, or cGMP modulators).
• Current active treatment with the dual endothelin receptor antagonist bosentan.
• TLC < 60% predicted; if TLC b/w 60 and 70% predicted, high resolution computed tomography must be available to exclude significant interstitial lung disease.
• FEV1 / FVC < 70% predicted and FEV1 < 60% predicted
• Significant left-sided heart disease (based on screening Echocardiogram):
• Significant aortic or mitral valve disease
• Diastolic dysfunction ≥ Grade II
• LV systolic function < 45%
• Pericardial constriction
• Restrictive cardiomyopathy
• Significant coronary disease with demonstrable ischemia.
• Chronic renal insufficiency defined as an estimated creatinine clearance < 30 ml/min (by MDRD equation).
• Current atrial arrhythmias not under optimal control.
• Uncontrolled systemic hypertension: SBP > 160 mm or DBP > 100mm
• Severe hypotension: SBP < 80 mmHg.
• Pregnant or breast-feeding.
• Psychiatric, addictive, or other disorder that compromises patient's ability to provide informed consent, follow study protocol, and adhere to treatment instructions.
• Active cyclosporine use.
• Known allergy or hypersensitivity to FK-506.
• Planned initiation of cardiac or pulmonary rehabilitation during period of study.
• Human Immunodeficiency Virus infection.
• Moderate to severe hepatic dysfunction with a Pugh score >10.
• Hyperkalemia defined as Potassium > 5.1 mEq/L at screening .
• Known active infection requiring antibiotic, antifungal, or antiviral therapies.

Where it is running

• Stanford University — Stanford, California, United States

Full record on ClinicalTrials.gov

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