You’ll find more discussion about the SORL1 Gene and it’s application to detecting Alzheimer’s disease on the Tangled Neuron. 
“The results of this study will not lead to a simple genetic test for increased risk of Alzheimer’s, at least not anytime soon.  But the discovery, along with related research, may generate new ideas for Alzheimer’s treatments,” mentions Mona Johnson. 
Mona’s father developed dementia.  In The Tangled Neuron, she discusses information about Alzheimer’s and brings you a layperson’s report on Alzheimer’s and dementia, carrying out her father’s wishes to research and inform others, “write about it so people can understand.”

Learn more about recent research into possible causes of Alzheimer’s as related to genetics.  Over at the Genetics & Health blog, Dr. Hsien Hsien Lei has posted information about the SORL1 Gene and Alzheimer’s Disease. 
This topic has been in the news recently, and  Dr. Lei refers to information in the New York Times.