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CR002, Human Monoclonal Antibody, Granted Orphan Drug Designation
"The ability to slow or prevent kidney failure in patients with IgA nephropathy has the potential to improve patient quality of life as well as to reduce a portion of the billions of dollars spent annually on dialysis and renal transplantation," stated Timothy M. Shannon, M.D., Executive Vice President Research and Development and Chief Medical Officer at CuraGen. "We are excited to be developing one of the first specific therapies for the prevention of kidney disease and failure, and believe that CR002 could be broadly applicable in kidney diseases where PDGF-D is involved in the pathogenesis."
IgA nephropathy is a chronic kidney condition estimated to affect as many as 130,000 patients annually in the U.S. The onset of IgA nephropathy primarily occurs during adolescence and young adulthood, between the ages of 15 and 35, with a significant fraction of these patients progressing to kidney failure. CR002 is a fully-human monoclonal antibody that neutralizes PDGF-D, a mediator known to stimulate mesangial cell proliferation and implicated in the pathogenesis of IgA nephropathy. Results from animal models of kidney inflammation suggest that neutralization of PDGF-D by CR002 can significantly reduce tissue scarring in the kidney and may possibly help to preserve kidney function. CR002 will be evaluated in a Phase I trial to determine its safety, tolerability, and pharmacokinetics. Currently, there is no FDA approved treatment of IgA nephropathy.
The Orphan Drug Act is intended to encourage companies to develop therapies for the treatment of diseases that affect fewer than 200,000 individuals in the U.S. Further criteria include the ability of the product to address an unmet medical need where no approved treatment option exists or to provide significant benefit over available treatments. Orphan drug designation, granted by the FDA's Office of Orphan Products Development, provides CuraGen with a number of potential benefits for CR002. Approval by the FDA of a drug that has been granted orphan drug designation typically results in seven years of market exclusivity in the U.S., provided that the sponsor company continues to meet certain conditions established by the FDA. In addition, during the period of market exclusivity, the FDA will not approve other applications to market the same drug for the same indication unless the sponsor of the approved orphan drug fails to satisfy the conditions of approval. Other incentives provided by orphan designation include tax credits, protocol assistance and eligibility for research and development support. Protocol assistance includes regulatory assistance and waiver of filing fees, as well as advice on the conduct of clinical trials.
Background on CR002 and Kidney Inflammation
CR002 is a fully human monoclonal antibody, generated with Abgenix's XenoMouse® technology, which neutralizes PDGF-D, a mediator discovered by CuraGen that stimulates mesangial cell proliferation. Mesangial cell proliferation has been implicated in the pathogenesis of IgA nephropathy, lupus nephritis, and diabetic nephropathy, forms of kidney inflammation that can lead to kidney failure. An effective treatment for kidney inflammation has the potential to delay or prevent kidney failure and avoid the need for dialysis or kidney transplantation.