A Non invasive Assay for Obstructive Sleep Apnea

Project Abstract PGXL Technologies is developing novel urine based tests for detecting obstructive sleep apnea OSA in children Obstructive sleep apnea OSA is a disorder giving rise to behavioral and learning problems including misdiagnoses as attention deficit hyperactivity disorder ADHD in children The CDC estimates the prevalence of pediatric OSA in the US at around million An added complication is that the prevalence of primary snoring PS in children approaches thus physicians are challenged in differentiating OSA from PS The gold standard test for diagnosing OSA in children is polysomnography PSG but it is expensive up to $ per test involves an overnight stay in a sleep laboratory and requires the placement of numerous sensors Parents are often unwilling and children too uncooperative to endure a PSG test Take home sleep devices allow patients to monitor their sleep patterns at home but are not available to children Thus a simple and inexpensive urine test would fill an important and significant clinical need A preliminary study comparing children diagnosed with OSA by polysomnography to children with PS revealed that the peptide urocortin UCN a stress related biomarker was significantly increased in the urine of children with OSA We have an issued US patent for the use of UCN as a biomarker for detecting OSA and have also developed a mass spectrometry based assay and an immunoassay to measure UCN To complete definitive studies validating the clinical sensitivity and specificity of using this biomarker as a diagnostic for OSA it is necessary to have robust CLIA validated and standardized assays not available today Upon completion of this Phase I project we will have optimized a mass spectrometry assay to CLIA validated standards including establishing preliminary reference ranges for UNC in urine Successful completion of this project will position our company for a Phase II project to rigorously develop immunoassays and clinically validate the use of UCN as a biomarker for detection of OSA This project is innovative in the application of a novel biomarker for detection of OSA in children and in the use of novel extraction methods for measuring UCN Having robust assays for detection of OSA is anticipated to have sustainable high impact in a significant and much needed clinical problem of diagnosing sleep apnea in children This will provide a sustainable commercialization path for PGXL Technologies to develop simple and inexpensive assays for clinical laboratories by way of assay kits as well as point of care and other vitro diagnostics applications Project narrative PGXL Technologies is developing a urine based test for detecting obstructive sleep apnea OSA in children Obstructive sleep apnea is a common disorder affecting an estimated million children in the USA Children are underdiagnosed for OSA due to the high cost and low compliance of polysomnography tests which require an overnight stay at a sleep center Our technology once clinically validated will allow physicians for the first time to screen children for OSA with a simple and inexpensive urine test