180 Participants Needed

TX000045 for Pulmonary Hypertension

Recruiting at 68 trial locations
CT
Overseen ByClinical Trials
Prior Safety DataThis treatment has passed at least one previous human trial

What You Need to Know Before You Apply

What is the purpose of this trial?

This trial tests a new treatment called TX000045 (also known as TX45 or Fc-relaxin fusion protein) for individuals with pulmonary hypertension (high blood pressure in the lungs) who also have heart failure. Researchers aim to assess how two different doses of the treatment affect symptoms over 24 weeks. Participants are divided into three groups: one receiving Dose A, another receiving Dose B plus a placebo, and a third receiving only a placebo. Suitable candidates for the trial have pulmonary hypertension with heart failure symptoms, such as shortness of breath, and have not been hospitalized or on certain medications recently. Participants should also be stable on their current heart medications. As a Phase 2 trial, this research focuses on evaluating the treatment's effectiveness in an initial, smaller group of people.

Will I have to stop taking my current medications?

The trial requires that your current heart failure or cardiovascular medications be at a stable dose before you start. It doesn't specify if you need to stop other medications, so it's best to discuss with the trial team.

Is there any evidence suggesting that TX000045 is likely to be safe for humans?

Research has shown that TX000045 is generally well-tolerated in human studies. In earlier research with healthy volunteers, most side effects were mild to moderate, and serious side effects were uncommon. Additionally, when administered as a single dose through an IV, TX000045 was well-tolerated, with few experiencing severe or harmful effects. These findings offer reassurance about the safety of TX000045 for those considering joining a clinical trial.12345

Why are researchers excited about this study treatment for pulmonary hypertension?

Researchers are excited about TX000045 because it offers a novel approach to treating pulmonary hypertension. Unlike most standard treatments that primarily dilate blood vessels to reduce pressure, TX000045 might work through a new mechanism, potentially addressing the root causes of the condition more effectively. Additionally, TX000045 is administered subcutaneously every two weeks, which could be more convenient than some current options that require more frequent dosing or invasive administration. This could mean a more manageable treatment routine and potentially better outcomes for patients.

What evidence suggests that TX000045 might be an effective treatment for pulmonary hypertension?

Research has shown that TX000045 may help treat pulmonary hypertension. In earlier studies, TX000045 reduced lung pressure by 19%, aiding breathing and easing the heart's workload. It also improved heart function and blood flow in patients with pulmonary hypertension related to heart failure. Most participants tolerated the treatment well, experiencing no serious side effects. In this trial, participants will receive either TX000045 Dose A, TX000045 Dose B, or a placebo. These findings suggest that TX000045 could effectively treat pulmonary hypertension.16789

Who Is on the Research Team?

RR

Robert Rogers, MD

Principal Investigator

Tectonic Therapeutic

Are You a Good Fit for This Trial?

This trial is for adults aged 18-80 with pulmonary hypertension secondary to heart failure who can walk a certain distance and have stable heart medication. They must not be pregnant, planning intense new exercise, or have recent drug abuse history or hospitalization.

Inclusion Criteria

I can understand and have signed the consent form.
I have been diagnosed with heart failure with preserved ejection fraction (HFpEF) based on heart tests.
I can walk between 100 to 450 meters in six minutes.
See 2 more

Exclusion Criteria

Initiated a new exercise program for cardiopulmonary rehabilitation or plans to initiate such a program during the study
Has a history of drug or alcohol abuse
I was recently hospitalized.
See 10 more

Timeline for a Trial Participant

Screening

Participants are screened for eligibility to participate in the trial

2-4 weeks

Treatment

Participants receive either TX000045 or placebo subcutaneously every 2 weeks for 24 weeks

24 weeks
12 visits (in-person)

Follow-up

Participants are monitored for safety and effectiveness after treatment

6 weeks

What Are the Treatments Tested in This Trial?

Interventions

  • TX000045
Trial Overview The APEX study tests two doses of TX000045 against a placebo over 24 weeks in patients with specific types of heart failure and high blood pressure. It's designed to see if the drug is effective (proof-of-concept) and participants are randomly assigned to groups.
How Is the Trial Designed?
3Treatment groups
Experimental Treatment
Placebo Group
Group I: TX000045 Dose BExperimental Treatment1 Intervention
Group II: TX000045 Dose AExperimental Treatment1 Intervention
Group III: PlaceboPlacebo Group1 Intervention

Find a Clinic Near You

Who Is Running the Clinical Trial?

Tectonic Therapeutic

Lead Sponsor

Trials
1
Recruited
180+

Published Research Related to This Trial

Elevated thrombospondin 1 (TSP1) contributes to cardiovascular issues like ischemia-reperfusion injury and pulmonary arterial hypertension by impairing blood vessel relaxation, making it a key target for treatment.
The study presents a novel therapeutic approach using recombinant human CD47 peptide (rh-CD47p) as a decoy receptor to neutralize TSP1, showing promising results in restoring normal blood vessel function in laboratory tests, indicating potential for treating TSP1-related cardiovascular conditions.
Novel Pharmaceutical Strategy for Selective Abrogation of TSP1-Induced Vascular Dysfunction by Decoy Recombinant CD47 Soluble Receptor in Prophylaxis and Treatment Models.Yao, M., Sturdivant, J., Ebrahimi, A., et al.[2021]
NTP42:KVA4, a novel oral formulation of a thromboxane A2 receptor antagonist, showed significant efficacy in preclinical models of pulmonary arterial hypertension (PAH) by improving cardiopulmonary hemodynamics and reducing RV remodeling, outperforming or matching standard-of-care PAH treatments.
In addition to alleviating pulmonary issues, NTP42:KVA4 demonstrated direct benefits on right ventricular (RV) function, including improved contractility and ejection fraction, suggesting it may serve as a disease-modifying therapy for PAH and related cardiac conditions.
The thromboxane receptor antagonist NTP42 promotes beneficial adaptation and preserves cardiac function in experimental models of right heart overload.Mulvaney, EP., Renzo, F., Adão, R., et al.[2023]
Hypoxia-induced persistent pulmonary hypertension (PPHN) in neonates leads to increased sensitivity of thromboxane (TxA2) receptors, which is linked to changes in receptor localization and binding properties in pulmonary artery myocytes.
In hypoxic conditions, the normal protective mechanism that desensitizes TxA2 receptors is lost, resulting in increased receptor affinity and coupling, which may contribute to elevated pulmonary arterial pressure in PPHN.
Thromboxane hypersensitivity in hypoxic pulmonary artery myocytes: altered TP receptor localization and kinetics.Hinton, M., Gutsol, A., Dakshinamurti, S.[2020]

Citations

Press Release DetailsTX45 improved both left heart function and pulmonary hemodynamics in patients with Group 2 Pulmonary Hypertension in Heart Failure with ...
NCT06616974 | A Study of TX000045 in Patients With ...TX000045-003 is a double-blind, randomized, parallel group, placebo-controlled, proof- of-concept (POC) study, evaluating 2 dose regimens of TX000045 over the ...
Tectonic Therapeutic Announces Third Quarter 2025 ...TX45 was well tolerated in the overall study population and demonstrated a 29.2% reduction in pulmonary capillary wedge pressure (PCWP) and a ...
Tectonic Therapeutic Announces Positive Topline Data fromTX45 improved both left heart function and pulmonary hemodynamics in patients with Group 2 Pulmonary Hypertension in Heart Failure with ...
Tectonic Therapeutic Presents Complete Results for ...In the overall study population, TX45 achieved a 19.0% reduction in pulmonary capillary wedge pressure (“PCWP”), an endpoint known to correlate ...
Abstract 4139216: The tolerability, safety, ...Results: 55 healthy volunteers were randomized. TX45 was well tolerated. Most adverse events were mild to moderate in intensity. The most common ...
NCT06616974 | A Study of TX000045 in Patients With ...TX000045-003 is a double-blind, randomized, parallel group, placebo-controlled, proof- of-concept (POC) study, evaluating 2 dose regimens of TX000045 over the ...
Tectonic Therapeutic Presents Complete Results for ...In the overall study population, TX45 achieved a 19.0% reduction in pulmonary capillary wedge pressure (“PCWP”), an endpoint known to correlate ...
Tectonic Therapeutic Announces Positive Topline Data ...The topline data showed that a single intravenous dose of TX45 was well tolerated in this patient population and resulted in meaningful ...
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