News Health & Medicine Gene variant might guard against Alzheimer’s, other dementia Same form has been linked to longevity and 'good' cholesterol levels By Nathan Seppa January 12, 2010 at 6:51 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Share on Facebook (Opens in new window) Facebook Share on Reddit (Opens in new window) Reddit Share on X (Opens in new window) X Print (Opens in new window) Print Carrying a variant form of the CETP gene is looking more and more like holding a winning genetic lottery ticket. This version of the gene might protect against Alzheimer’s disease and other forms of dementia, researchers report in the Jan.