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A Phase 1 Trial to Assess the Safety, Tolerability, and Pharmacokinetics of GS 9411 in Subjects With Cystic Fibrosis (CF)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT01025713
Recruitment Status : Withdrawn (Development program terminated.)
First Posted : December 3, 2009
Last Update Posted : July 9, 2015
Information provided by (Responsible Party):
Gilead Sciences

Brief Summary:
The purpose of this study is to evaluate the safety and tolerability of GS-9411 in patients with Cystic Fibrosis. GS-9411 is a sodium channel inhibitor, that may restore airway hydration and mucociliary clearance in the lung.

Condition or disease Intervention/treatment Phase
Cystic Fibrosis Mucociliary Clearance Drug: GS-9411 Drug: Placebo Phase 1

Detailed Description:
GS-9411 is being evaluated as a potential therapy to improve airway hydration and mucociliary clearance in patients with cystic fibrosis. This study is evaluating the safety and tolerability of 2 dose levels of GS-9411 as an inhaled product, compared to a matched placebo.

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 0 participants
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase 1, Randomized, Double-Blind, Placebo-Controlled Trial to Assess the Safety, Tolerability, and Pharmacokinetics of GS 9411 in Subjects With Cystic Fibrosis (CF)
Study Start Date : December 2009
Actual Primary Completion Date : March 2010
Estimated Study Completion Date : April 2010

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Cystic Fibrosis

Arm Intervention/treatment
Experimental: 1
GS-9411 2.4 mg
Drug: GS-9411
Inhaled GS-9411

Experimental: 2
GS-9411 4.8 mg
Drug: GS-9411
Inhaled GS-9411

Placebo Comparator: Placebo
Drug: Placebo
Inhaled Placebo

Primary Outcome Measures :
  1. To evaluate the safety and tolerability of escalating doses of inhaled GS-9411 in subjects with CF. [ Time Frame: 5 Days ]

Secondary Outcome Measures :
  1. To assess the pharmacokinetics (PK) of GS-9411 and its metabolites, in plasma, urine, and sputum after single inhaled doses. [ Time Frame: 5 Days ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   18 Years to 65 Years   (Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Males and females aged 18 to 65 years
  • Patients with diagnosis of CF as confirmed by at least one of the following:
  • Documented sweat chloride ≥ 60 mEq/L by quantitative pilocarpine iontophoresis test OR
  • Documented sweat sodium test ≥ 60 mmol/L OR
  • Abnormal nasal potential difference test OR
  • At least one well-characterized disease-causing genetic mutation in the CF transmembrane conductance regulatory (CFTR) gene AND
  • Accompanying symptoms characteristic of CF
  • Normal (or abnormal but not clinically significant) electrocardiogram (ECG)
  • Normal intraocular pressure (IOP) between 10 and 21 mm Hg at Screening.
  • Normal (or abnormal but not clinically significant) blood pressure (BP) and heart rate (HR) in the absence of any medications for hypertension; these will be measured after the subject has rested supine for 3 minutes; normal BP is taken to be 90 to 140 mm Hg systolic and 50 to 89 mm Hg diastolic; normal HR is taken to be 40 to 100 beats per minute (bpm)
  • Able to communicate well with the investigator and to comply with the requirements of the entire study
  • Provision of written informed consent to participate as shown by a signature on the volunteer consent form
  • Nonsmokers for at least 180 days (6 months) prior to Screening
  • Must be willing to abstain from alcohol and strenuous exercise during the 48 hours prior to Screening, 72 hours prior to initial dosing, and during the study
  • Forced expiratory volume in 1 second (FEV1) ≥ 50% predicted normal for age, gender, and height at Screening as per Knudson et al
  • Stable regimen of oral CF medications, dornase alfa, and physiotherapies for the period 28 days prior to Screening; those subjects taking continuous (non-cycling) inhaled antibiotics for prophylaxis must be on a stable regimen of these drugs for at least 90 days prior to Screening
  • Subjects must be in the off-phase of any cyclical inhaled antibiotic treatment regimen
  • Must test negative for hepatitis B virus (HBV), hepatitis C virus (HCV), and human immunodeficiency virus (HIV) at Screening
  • Male subjects who are sexually active must be willing to use effective barrier contraception (e.g., condom) during heterosexual intercourse from Day -1 through completion of the study and continuing for at least 90 days from date of last dose of study drug
  • Male subjects must refrain from sperm donation from Day -1 through completion of the study and continuing for at least 90 days from the date of last dose of study drug
  • Nonlactating females. Females on hormone replacement therapy (estrogen/progesterone) or contraceptive therapy must be stabilized on a product and dose for at least 90 days prior to Screening
  • Females must have a negative serum gonadotropin pregnancy test at Screening and Day -1
  • Nonpregnant females of childbearing potential must agree to use highly effective (<1% failure rate) contraception during heterosexual intercourse from Screening, throughout the study, and for at least 30 days following the last dose of study drug
  • Glomerular filtration rate (GFR) of < 60 mL/min/1.73m2 at Screening (GFR to be calculated using the Cockcroft-Gault equation), and alanine aminotransferase (ALT) and aspartate aminotransferase (AST) less than or equal to 3× upper limits of normal (ULN)
  • Chest radiograph at Screening without significant acute findings (e.g., infiltrates [lobar or diffuse interstitial], pleural effusion, pneumothorax); or chest radiograph, CT, or MRI obtained within the 90 days prior to Screening without acute findings or significant intercurrent illness; chronic, stable findings (e.g., chronic scarring or atelectasis) are allowed. A chest radiograph obtained and interpreted between Screening and Day 1 is also acceptable for determining eligibility.

Exclusion Criteria:

  • Administration of any investigational drug or device in the 28 days prior to Screening
  • A need for any new medication during the period 28 days before first dosing with study drug, except those deemed by the principal investigator/clinical investigator not to interfere with the outcome of the study
  • Subjects who routinely use inhaled hypertonic saline must discontinue use for at least 14 days prior to clinic admission and for the duration of the study
  • Use of trimethoprim or high dose ibuprofen (> 800 mg/day) during the 28 days prior to first dosing
  • Serious adverse reaction or hypersensitivity to any drug
  • Existence of any surgical or medical condition which, in the judgment of the clinical investigator, might interfere with the absorption, distribution, metabolism, or excretion of the drug
  • Lactating females
  • History of airway intolerance to hypertonic saline
  • History of lung transplantation
  • History of a positive test for Burkholderia cepacia
  • History of cirrhosis or ascites
  • History of clinically significant adrenal disease
  • History of congestive heart failure diagnosed clinically or with documented left ventricular ejection fraction (LVEF) ≤ 40%
  • History of glaucoma
  • Consumption of drugs and/or herbal preparations capable of inducing hepatic enzyme metabolism (e.g., barbiturates, rifampicin, carbamazepine, phenytoin, primidone, or St. John's Wort) within 28 days (or 5 half-lives of inducing agent, whichever is longer) of Screening
  • Subjects requiring any of the following drugs in the 28 days prior to Screening: diuretics (e.g., spironolactone, amiloride, thiazide), ACE inhibitors, angiotensin receptor blockers, oral corticosteroids, or medicines for hypertension
  • Donation or loss of greater than 400 mL of blood in the period 90 days (3 months) prior to Screening
  • Major surgery within 180 days (6 months) of Screening
  • Hemoglobin levels < 120 g/L in females or < 130 g/L in males taken at Screening and at Day -1
  • Serum potassium > 5 mEq/L taken at Screening and at Day -1
  • Poor venous access

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT01025713

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Australia, Victoria
Nucleus Network, Ltd.
Melbourne, Victoria, Australia
Sponsors and Collaborators
Gilead Sciences
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Principal Investigator: John Wilson, MD The Alfred
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Responsible Party: Gilead Sciences Identifier: NCT01025713    
Other Study ID Numbers: GS-US-221-0106
First Posted: December 3, 2009    Key Record Dates
Last Update Posted: July 9, 2015
Last Verified: July 2015
Keywords provided by Gilead Sciences:
Cystic Fibrosis
Mucociliary Clearance
Epithelial Sodium Channel Inhibitor
ENaC Inhibitor
Airway Hydration
Additional relevant MeSH terms:
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Cystic Fibrosis
Pathologic Processes
Pancreatic Diseases
Digestive System Diseases
Lung Diseases
Respiratory Tract Diseases
Genetic Diseases, Inborn
Infant, Newborn, Diseases