Fast multiplexed point-of-care diabetes autoantibody detection by homogeneous FRE

DESCRIPTION (provided by applicant): This application is a feasibility study for a point of care device for rapid multiplexed analysis of the most common auto-antibodies that indicate high risk for developing type 1diabetes (T1D), an autoimmune disorder caused by destruction of the cells required to produce insulin and regulate the body's energy metabolism. While classified with the much more common type 2 diabetes, for practical purposes they are distinct diseases on the basis of etiology, diagnosis, metabolism, epidemiology, and treatment. There is no known cure, but interest is increasing in screening and early detection to enable better disease control and prevention in the future. Among youth the rate of new cases of T1D is between 18 and 20 per 10,000each year. In adults, T1D is thought to account for as much as 5 percent of all diagnosed cases of diabetes, and the costs attributed to type 1diabetes compared to type 2 are disproportionately high. Poorly controlled T1D before conception and during thefirst trimester can cause major birth defects in 5 percent to 10 percent of pregnancies and spontaneous abortions in15 percent to 20 percent of pregnancies. T1D often goes undiagnosed because its symptoms are difficult to pinpoint, and patients generallyonly seek care for acute symptoms soon after the onset of hyperglycemia. The best characterized current biomarkers for early identification of T1D risk are islet cell auto-antibodies (ICA) which inappropriately target intracellular proteins released from dying pancreatic cells. ICAs are not thought to be causal but rather to be a response to antigens released into circulation by undetected T-cell killing of pancreatic islet beta cells. In other words, when the causal disease process is already underway butundetectable, ICAs provide a circulating biomarker to alert clinicians to elevated T1D risk. In particular, auto-antibodies against the proteins insulin, IA-1, GAD65, and ZnT8 are hallmarks of high T1D risk, and the more ICAs are present, the higher therisk. This Phase I feasibility study seeks to develop a fast point-of-care diagnostic platform (the EOSCAPE-T1D) which can simultaneously measure the levels of multiple ICAs in doctors offices, labs, clinics, and hospitals with minimally trained staff and little to no other infrastructure. Current ICA diagnostis are complex, and require long wait times, extensive laboratory equipment, specially trained technicians, and often radioactive isotopes. The EOSCAPE-T1D is an enclosed cartridge point of care diagnostic adapted from the applicant organization's EOSCAPE-HIV platform, which pioneered a suite of new technologies for high-performance nucleic acid testing with a low cost-per-result. The EOSCAPE-HIV was chosen for development in September 2009 by NIAIDfor use in differentiating between true infection and vaccine-induced seropositivity in future HIV vaccine trials and is now entering the verification and validation stage of development. The EOSCAPE-T1D will combine proprietary micro-fluidic actuators and cartridge architecture with novel lanthanide time resolved Forster resonance energy transfer detection for a homogeneous multiplexed assay for T1D auto-antibodies. PUBLIC HEALTH RELEVANCE: Project Narrative Type 1 diabetes is a devastating disease in which the body's immune system destroys its own insulin-producing cells, requiring a lifetime of intensive insulin therapy. Unlike the more common type 2 diabetes, type 1 diabetes is most common in young children. This application focuses on development of a powerful new tool for detecting type 1 diabetes early on, when emerging therapies might be able to change the course of the disease: a blood testing system which is both technologically advanced and suitable for use in settings where at-risk young children are already receiving routine medical care.