Gene Patterns Can Predict When--But Not Whether--Alzheimer's Will Strike

Scientists at the Johns Hopkins School of Public Health have discovered that one of three normal variants of a gene called apolipoprotein-E (APOE) can be used to predict when a person will get Alzheimer's disease, if that person is predisposed to the disorder in the first place.

The study showed that the E-4 variant (or allele) of the APOE gene influenced the timing of the onset of Alzheimer's in about half of the population. The study appeared in the August 19 issue of Nature Genetics.

Senior author John C.S. Breitner, MD, professor and chair, Mental Hygiene, the Johns Hopkins School of Public Health, said, "About half the population will eventually get Alzheimer's, but we don't yet know how to distinguish those who will from those who won't. For the person who is predisposed for the disease, however, we have found that the number of E-4 genes he or she has inherited can tell us roughly how old that person will be when the disease strikes. By furthering our ability to predict how vulnerable a person is to Alzheimer's, these findings have implications for identifying lifestyle choices that may be protective against the disease."

The investigators administered a battery of standardized neuropsychological tests to a population of 4,932 elderly persons and then gave full clinical exams to those who were suffering from dementia, in order to determine the true cases of Alzheimer's. The authors then looked for relationships between the incidence of the disease and the presence or absence of the different variants of APOE.

In that half of the population predisposed for Alzheimer's, those who inherited two E4 alleles (one from each parent) experienced onset by age 80 to 85; those who inherited a single E4 allele from one parent developed the disorder by age 90 to 95. Those who inherited no E4 alleles got Alzheimer's by age 95 to 100, if at all. People in the half of the population not predisposed to the disorder did not develop

Contact: Lisbeth Pettengill
Johns Hopkins University Bloomberg School of Public Health

Page: 1 2

Related biology news :

1. Patterns in plant evolution
2. In Animal Groups, Scientists See Patterns That Could Predict The Future
3. Study Suggests Weekly Hurricane And Rainfall Patterns Are Linked To East Coast Pollution
4. Geologist Finds Hidden Patterns Of Diversification In Ordovician Radiation
5. NCAR Scientist Models Earths Climate and Vegetation Patterns At Last Glacial Peak
6. Changing Continental Runoff Patterns Could Change Ocean Circulation
7. Behemoth Animals May Follow Same Extinction Patterns
8. Predicting cancer patient survival with gene expression data
9. Predicting progression of common cancers
10. Predicting the movement of genes
11. Predictive testing for hereditary breast and ovarian cancer: its effect on women

Post Your Comments:

(Date:8/21/2020)... ... August 19, 2020 , ... ... expo uniting life science, data science, informatics and IT leaders goes VIRTUAL and ... period of uncertainty and change, Bio-IT takes the leadership role of keeping our ...
(Date:8/7/2020)... Ky. (PRWEB) , ... August 06, 2020 , ... ... selected to participate in the prestigious National STEM Scholar Program, a unique professional ... network building, and project support for middle school science teachers nationwide. , Created ...
(Date:7/22/2020)... ... July 21, 2020 , ... ... in technology and compliance, announces a new solution to manage regulated workloads on ... layer of their technology stack complies with FDA and global regulations. USDM's new ...
Breaking Biology News(10 mins):
(Date:7/18/2020)... ... July 16, 2020 , ... After research model surgery and catheter implantation, the ... is only the beginning of a successful study, while protecting and accessing the catheter ... Global Head of Surgery from Envigo in a live webinar ...
(Date:7/10/2020)... , ... July 08, 2020 , ... ... and products, announces a significant expansion of laboratory operations through its COVID-19 ... agencies implementing testing programs. , Bode-CARES provides a turnkey solution ...
(Date:7/7/2020)... SAN DIEGO (PRWEB) , ... July 06, 2020 , ... ... a new program featuring up to 200 million stem cells. Depending on the patient's ... of seniors in the US will die having some form of Alzheimers dementia, and ...
(Date:7/1/2020)... WESTMINSTER, Colo. (PRWEB) , ... ... ... providers of expert tissue data insights, today announced that the launch of ... PD-L1 results along with data about the tumor microenvironment (TME). , “Flagship’s ...
Breaking Biology Technology:
Cached News: