The primary objective of this study is to determine the safety and efficacy of SPI-1005 treatment in CF patients with active pulmonary exacerbation that are receiving an IV course of tobramycin, determined by comparing hearing assessments, spirometry, Pharmacokinetic (PK), Physical Exam, Adverse Events (AEs) and Labs baseline to post-treatment. The secondary objectives of this study are to determine Pharmacogenomics and Pharmacodynamics of SPI-1005.
Randomized, double-blind, placebo-controlled study to evaluate the safety, and efficacy of SPI-1005 in Cystic Fibrosis patients with Acute Pulmonary Exacerbation receiving intravenous tobramycin at risk for ototoxicity. All patients will undergo baseline testing and have their severity of lung function, sensorineural hearing loss, tinnitus and vertigo determined before the start of SPI-1005 treatment. SPI-1005 treatment will start within first two days of IV tobramycin treatment and be administered concomitantly. At the end of the 21-day course of SPI-1005 and 28 days following the cessation of SPI-1005, patients will have their hearing loss, tinnitus and vertigo reassessed. Assessments may also include additional audiometric and pulmonary testing, and additional follow-up testing.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
QUADRUPLE
Enrollment
35
Medical University of South Carolina
Charleston, South Carolina, United States
Sensorineural Hearing Loss Using Pure-tone Audiometry
Number of participants with ototoxicity: Sensorineural hearing loss using pure-tone audiometry according to the American Speech-Language-Hearing Association (ASHA) criteria for ototoxicity.
Time frame: 4 weeks post-tobramycin
Distortion Product Otoacoustic Emissions
Number of participants with ototoxicity: Decreases in Distortion Product Otoacoustic Emissions (DPOAE), defined as a greater than or equal to 5 dB decrease in DPOAE amplitude in at least one test frequency.
Time frame: 4 weeks post-tobramycin
Speech Discrimination
Number of participants with ototoxicity: Decreases in speech discrimination using the Words in Noise test (WIN) score (0-35, where higher scores are a better outcome), defined as a 10% or greater decrease in WIN score from participant's baseline score.
Time frame: 4 weeks post-tobramycin
Tinnitus Severity
Number of participants with ototoxicity: Increases in Tinnitus Functional Index (TFI) score (0-100, where higher scores are a worse outcome), defined as an increase of 10 points or more from baseline.
Time frame: 4 weeks post-tobramycin
Vertigo Severity
Number of participants with vestibulotoxicity: Increases in Vertigo Symptom Scale - Short Form score (0-60, where higher scores are a worse outcome), defined as an increase of 6 points or more from baseline.
Time frame: 4 weeks post-tobramycin
Changes in Lung Function
Evaluation of lung function using spirometry, assessed using the change from baseline in Forced Expiratory Volume in 1 second (FEV1).
Time frame: 4 weeks post-tobramycin
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600 mg SPI-1005 bid po x 21d