Posted on Tue, Aug. 23, 2011
last updated: August 23, 2011 06:57:53 AM
Zinfandel Pharmaceuticals, a Chapel Hill company headed by eminent scientist Allen Roses, has staked out the ambitious goal of revolutionizing the medical community's approach to Alzheimer's disease.
Armed with a deal announced earlier this year with Takeda Pharmaceutical, Japan's largest drug company, Zinfandel is gearing up for clinical trials designed to demonstrate that Takeda's drug Actos - a prescription medicine for diabetes - can delay the onset of Alzheimer's.
The key to that deal, which calls for Takeda to pay Zinfandel $9 million up front and up to $78 million for reaching development milestones, is Zinfandel's patents for TOMM40, the second gene linked to an increased risk of Alzheimer's disease.
Roses led a team of scientists who made that discovery after retiring as a senior vice president at GlaxoSmithKline, an effort that included spending nearly $500,000 for one experiment that he funded with a home equity loan.
Roses, 68, said of his decision to finance the research: "I've had two heart attacks. I do have a pacemaker. Ever since 1990 when I had the first one, which was [very serious], I don't take prisoners."
Roses also is on the faculty at Duke University, where he is Jefferson-Pilot Professor of Neurobiology and Genetics, among other roles. During an earlier stint at Duke, he led the team of gene hunters that, in 1992, made the blockbuster discovery linking Alzheimer's to the APOE gene.
But one of the variants of that gene, APOE4, is only useful for predicting half the cases of late-onset Alzheimer's. However, TOMM40 can account for more than 90 percent of Alzheimer's cases, Roses said.
The clinical trial that Zinfandel is planning aims to confirm TOMM40's ability to predict the onset of cognitive impairment of Alzheimer's and demonstrate that Actos can delay its onset.
"This is a really unique opportunity for an existing product that we know is very safe," said Arthur Pappas, founder and managing partner of Durham venture capital firm Pappas Ventures. "If the clinical trials are [successful], it will have a profound effect on medicine, on Alzheimer's patients'... quality of life."
Pappas Ventures represented Zinfandel and Roses in the negotiations with Takeda; Pappas Ventures isn't an investor in Zinfandel, which is 100 percent owned by Roses.
Actos lowers blood glucose levels by stimulating the growth of mitochondria - the cell engines that metabolize glucose. The theory is that by stimulating the growth of mitochondria in the brain, Actos can delay Alzheimer's ability to kill brain neurons.
The worldwide clinical trials, which will take about five years to complete, will involve 4,000 patients ages 62-83 who today have "normal" brain function as defined by standard neuropsychological tests. Half the patients who are diagnosed as high-risk for Alzheimer's - thanks to the predictive ability of TOMM40 - will receive Actos, while others will receive a placebo. They will be tracked to see when "cognitive impairment" - the first visible symptoms of Alzheimer's - materializes.
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