PRO-140, a monoclonal antibody against the HIV coreceptor CCR5, is under investigation by Progenics and the Aaron Diamond AIDS Research Center (ADARC) as a potential treatment for HIV infection , , . Phase I/II trials were expected to commence during 2001 , , despite being initially planned for 2000 , , , , . In January 1998, ADARC and Progenics reported that the HIV binding site on the CCR5 coreceptor is distinct from betachemokine binding domains, which they claimed may allow for the development of therapeutics with fewer side effects , 421256]. In vitro studies have shown PRO-140 potently blocked all of 17 primary HIV isolates that use CCR5 as a fusion coreceptor . In October 2000, Progenics was awarded an SBIR grant to fund a 2-year project exploring the breadth, potency and durability of PRO-140 therapy in laboratory and animal models of HIV infection. This project was a collaboration between Progenics, Weill Medical College of Cornell University and the Scripps Research Institute . In May 1999, the company entered into an agreement with Protein Design Labs (PDL) for the humanization by PDL of PRO-140 . In November 1997, Progenics was awarded a 600,000 dollars grant from the NIAID for the examination of new approaches to HIV vaccine design based on CCR5 .
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