CXA-10 Study in Subjects With Pulmonary Arterial Hypertension

Phase 2

Terminated

• Conditions: PAH
• Interventions: Drug: CXA-10

• Registration Number: NCT04053543
• Lead Sponsor: Complexa, Inc.

Brief Summary

This is a Phase 2, multicenter, open-label extension (OLE) of study CXA-10-301, to evaluate the long term safety and efficacy of daily dosing of CXA-10.

Detailed Description

This is a Phase 2, multicenter, open-label extension (OLE) of study CXA-10-301, to evaluate the long term safety and efficacy of daily dosing of CXA-10.

The study will be performed in approximately 50 study centers across the United States and the United Kingdom, which participated in CXA-10-301. Approximately 96 subjects who completed treatment in CXA-10-301 will be eligible to participate in this OLE study, after completing all Visit 9 (Day 1 and Day 2) assessments in CXA-10-301.

Study participation for each subject will last up to approximately 6.5 months. The study will consist of a 6 month open-label treatment period and require 5 clinic visits and 1 telephone visit, including the Baseline Visit completed simultaneously with Visit 9 CXA-10-301, plus a follow-up visit approximately 2 weeks following the last dose of CXA-10.

Study Timeline

• Study First Submitted: 2019-07-19
• Study First Submitted QC: 2019-08-08
• Study Start: 2019-08-09
• Study First Posted: 2019-08-12
• Status Verified: 2020-08
• Primary Completion: 2020-08-12
• Study Completion: 2020-08-12
• Last Update Submitted: 2020-08-24
• Last Update Posted: 2020-08-26

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 33

Inclusion Criteria

1. Evidence of a personally signed and dated informed consent document indicating subject has been informed of all pertinent aspects of the study prior to initiation of any study-required procedures.
2. Is willing and able to comply with scheduled visits, treatment plan, laboratory tests and other study procedures.
3. Has completed the CXA-10-301 study and demonstrated compliance with study medication administration and study requirements.
4. If receiving simvastatin-containing products: simvastatin (Zocor), Vytorin, or any other combination therapy containing simvastatin, simvastatin dose does not exceed 20 mg/day.
5. Currently receiving no more than three of the following previously approved PAH therapies: phosphodiesterase type 5 (PDE-5) inhibitors, endothelin receptor antagonists (ERA), soluble guanylate cyclase (sGC) stimulator, prostanoids, prostacyclin receptor agonists.
6. Women of childbearing potential and males with partners of childbearing potential must agree to use a reliable method of contraception while taking study medication.

Exclusion Criteria

1. Severe hypotension defined by systolic blood pressure <90 mmHg from sitting blood pressure measurement at Baseline.

2. Hypertensive defined by >160 mmHg systolic or >110 mmHg diastolic from sitting blood pressure measurement at Baseline.

3. QTcF on supine ECGs at Baseline (Visit 1) of >500 msec.

4. Acute myocardial infarction or acute coronary syndrome (ST-Elevation Myocardial Infarction [STEMI], Non STEMI [NSTEMI] and or unstable angina) within the last 90 days prior to Baseline.

5. Recent cerebrovascular accident/transient ischemic attack (CVA/TIA) within the last 90 days prior to Baseline.

6. Recent hospitalization for left heart failure within the last 90 days prior to Baseline.

7. Clinically significant aortic or mitral valve disease defined as greater than mild regurgitation or mild stenosis; pericardial constriction; restrictive or constrictive cardiomyopathy; left ventricular dysfunction (LVEF < 50%); left ventricular outflow obstruction; symptomatic coronary artery disease; autonomic hypotension; or fluid depletion, in the opinion of the investigator.

8. Chronic atrial fibrillation and life-threatening cardiac arrhythmias.

9. Personal or family history of congenital prolonged QTc syndrome or sudden unexpected death due to a cardiac reason.

10. Clinically significant anemia in the opinion of the investigator that precludes enrollment into this study, or Hb <9 gm/dl.

11. Severe hepatic impairment (Child-Pugh class C with or without cirrhosis) at Baseline or active chronic hepatitis.

12. Received intravenous inotropes within 2 weeks prior to Baseline (e.g. dopamine, dobutamine).

13. History of angina pectoris or other condition that was treated with long or short acting nitrates <12 weeks of Baseline.

14. History of herbal or natural medication use (including fish oil) within 2 weeks or 5 half-lives, whichever is longer, prior to Baseline.

15. Received prednisone at doses > 15 mg/ day or changes in immunosuppressive medications <12 weeks prior to Baseline.

16. Currently taking a drug that may affect the assay measurement of serum creatinine (e.g. cimetidine, Bactrim, Pyridium). A list is provided in Appendix H.

17. Newly prescribed drug or increased dose of an existing drug that is known to prolong the QTc interval and has been associated with Torsades de Pointes (TdP) identified in the CredibleMeds.org website list as known risk (KR) of TdP.

Note: Stable doses of drugs classified as conditional risk (CR) of TdP or possible risk (PR) of TdP are permitted (i.e., subject has received the same dose and regimen for at least 30 days prior to Baseline with no anticipated changes to the dose or regimen during the course of the study).

22. Currently taking dimethyl fumarate (Tecfidera™).

23. Any of the following laboratories abnormal and unresolved in CXA-10-301:

24. Absolute lymphocyte counts < 0.5 x 109 cells/L.

25. Aspartate aminotransferase (AST) and/or alanine aminotransferase (ALT) > 3.0X upper limit of normal (ULN), alkaline phosphatase (AP) > 2X ULN of liver origin, and total bilirubin >2X ULN. If all liver function tests (LFTs) are within normal limits (WNL) and total bilirubin is elevated, examination of direct and indirect bilirubin may be conducted to evaluate for Rotor's/Gilbert's Syndrome. Subjects with Rotor's/Gilbert's Syndrome may be enrolled.

26. eGFR < 30 mL/min/1.73 m2 (estimated by Chronic Kidney Disease Epidemiology Collaboration [CKD-EPI] Creatinine/Cystatin C 2012 algorithm) at Baseline.

    24. Females who are pregnant or breastfeeding, or who are trying to conceive. 25. Recent (within 1 year) history of abusing alcohol or illicit drugs. 26. History of any primary malignancy, including a history of melanoma or suspicious undiagnosed skin lesions, or other malignancies (such as thyroid or testicular) that have been curatively treated and with no evidence of disease for at least 3 years or prostate cancer who is not currently or expected, during the study, to undergo radiation therapy, chemotherapy, and/or surgical intervention, or to initiate hormonal treatment.

    Exception: subjects with history of basal cell or squamous cell carcinomas of the skin or cervical carcinoma in situ are eligible for enrollment.

    27. Cardiovascular, liver, renal, hematologic, gastrointestinal, immunologic, endocrine, metabolic, central nervous system or psychiatric disease that, in the opinion of the investigator, may adversely affect the safety of the subject and/or efficacy of the investigational product or severely limit the lifespan of the subject other than the condition being studied.

    28. Clinically significant hyperthyroidism or hypothyroidism not adequately treated.

    29. Any other condition and/or situation that causes the Investigator to deem a subject unsuitable for the study (e.g., due to expected study medication non- compliance, inability to medically tolerate the study procedures, or a subject's unwillingness to comply with study-related procedures).

    30. Known hypersensitivity to CXA-10, the metabolites, or formulation excipients.

    31. Treatment with any investigational drug (other than CXA-10) or device within 30 days or 5 half-lives (whichever is longer) prior to Baseline (this includes investigational formulations of marketed products, inhaled and topical drugs), or plans to participate in an investigational drug or device study at any time during this study.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
150mg CXA-10	CXA-10	Once daily dosing of 150mg CXA-10 in the morning

Primary Outcome Measures

Name	Time	Method
Changes in respiration	6 months	Change from baseline values at each post-baseline time point
Incidence of AEs	6 months	Adverse events occurring during the treatment period
Changes in heart rate	6 months	Change from baseline values at each post-baseline time point
Changes in blood pressure	6 months	Change from baseline values at each post-baseline time point

Secondary Outcome Measures

Name	Time	Method
6 Minute Walk Distance	6 months	Change from baseline in 6-minute walk distance (6MWD)
Who Classification of Functional Status	6 months	Change from baseline in WHO Classification of Functional Status of Patients with PH
Clinical worsening	6 months	Death from any cause, hospitalization for worsening PAH, Disease progression, unsatisfactory long-term clinical response
PAH-specific medication changes	6 months	Addition or removal of PAH-specific medications, including any dose changes

Trial Locations

Locations (37)

University of Chicago; 🇺🇸 Chicago, Illinois, United States

Duke University; 🇺🇸 Durham, North Carolina, United States

University of Pennsylvania; 🇺🇸 Philadelphia, Pennsylvania, United States

UT Southwestern; 🇺🇸 Dallas, Texas, United States

Houston Methodist; 🇺🇸 Houston, Texas, United States

University of Arizona; 🇺🇸 Tucson, Arizona, United States

NYU Langone Medical Center; 🇺🇸 New York, New York, United States

Mayo Clinic; 🇺🇸 Jacksonville, Florida, United States

Anaheim Clinical Trials, LLC; 🇺🇸 Anaheim, California, United States

University of California San Diego; 🇺🇸 La Jolla, California, United States

University of Alabama; 🇺🇸 Birmingham, Alabama, United States

Washington Hospital (Medstar); 🇺🇸 Washington, District of Columbia, United States

George Washington Medical Faculty Associates; 🇺🇸 Washington, District of Columbia, United States

The Ohio State University; 🇺🇸 Columbus, Ohio, United States

University of Florida Health; 🇺🇸 Gainesville, Florida, United States

University of Miami; 🇺🇸 Miami, Florida, United States

Cleveland Clinic; 🇺🇸 Cleveland, Ohio, United States

Golden Jubilee National Hospital; 🇬🇧 Glasgow, United Kingdom

Indiana University; 🇺🇸 Indianapolis, Indiana, United States

Washington University and Barnes Jewish Hospital; 🇺🇸 Saint Louis, Missouri, United States

University of Minnesotta; 🇺🇸 Minneapolis, Minnesota, United States

Royal Free; 🇬🇧 London, United Kingdom

Vanderbuilt University; 🇺🇸 Nashville, Tennessee, United States

Freeman Hospital; 🇬🇧 Newcastle Upon Tyne, United Kingdom

Allegheny General Hospital; 🇺🇸 Pittsburgh, Pennsylvania, United States

Froedert Medical College of Wisconsin; 🇺🇸 Milwaukee, Wisconsin, United States

Royal Brompton; 🇬🇧 London, United Kingdom

Christ Hospital-Lindner Research Center; 🇺🇸 Cincinnati, Ohio, United States

Texas Tech; 🇺🇸 El Paso, Texas, United States

Sentara Medical Group; 🇺🇸 Norfolk, Virginia, United States

University of California San Francisco; 🇺🇸 San Francisco, California, United States

Inova Medical Campus; 🇺🇸 Falls Church, Virginia, United States

University of Virginia School of Medicine; 🇺🇸 Charlottesville, Virginia, United States

Hammersmith Hospital; 🇬🇧 London, United Kingdom

Royal Hallamshire Hospital; 🇬🇧 Sheffield, United Kingdom

National Jewish Health; 🇺🇸 Denver, Colorado, United States

University of Kansas; 🇺🇸 Kansas City, Kansas, United States