MELBOURNE, AUSTRALIA--(MARKET WIRE)--Sep 24, 2007 -- Prana Biotechnology Limited (NasdaqCM:PRAN - News) (ASX:PBT.AX - News), a biopharmaceutical company focused on the research and development of treatments for neurodegenerative disorders, today announced it has completed patient enrollment in its Phase IIa clinical trial of PBT2 in patients with early Alzheimer's disease.