Genetic linkage studies indicate evidence for one or more Alzheimer's disease (AD) genes on chromosome 19 independently of the apolipoprotein E gene, a well-characterized AD-risk factor. Recently, the PIN1 gene on chromosome 19p13.2 has been proposed as a candidate gene for AD. Here, we have investigated the potential impact of two promoter polymorphisms (rs2233678 and rs2233679) within this gene on the risk of developing AD. No association of these polymorphisms or haplotypes with the disease was observed in a large French case-control population. Our data suggest that these genetic variants in PIN1 do not make a significant contribution to AD risk.