No common BRCA mutations,
no APOE risk alleles.
Not exact matches
Individuals were classified as high
risk for Alzheimer's if a DNA test identified the presence of a genetic marker — having one or both of the apolipoprotein E-epsilon 4
allele (
APOE - e4
allele) on chromosome 19 — which increases the
risk of developing the disease.
The obvious step, Roses realized, was to find out whether individual
APOE alleles influence the
risk of developing Alzheimer's disease.
Carriers of the apolipoprotein (
ApoE) ɛ4
allele are at greater
risk for developing late - onset Alzheimer's disease (AD), develop AD at an earlier age, and experience a more severe cognitive decline and shorter survival times.
A new study published in the current issue of Biological Psychiatry suggests that even when controlling for the
risk for Alzheimer's disease, the
APOE ε4
allele also conveys an increased
risk for late - life depression.
DONG ET AL.The
allele apolipoprotein E ε4 (
APOE ε4) is the greatest genetic
risk factor for Alzheimer's disease (AD), but the role of the
ApoE4 protein in AD has long been elusive.
The results remained significant after adjusting for multiple
risk factors including age, sex, race, education, and presence of an
APOE ɛ 4
allele.
We have developed genetic specific
risk curves for patients with Mild Cognitive Impairment, a condition where the
APOE e4
allele is associated with more rapid progression to AD and differential response to certain pharmacological treatments.
We found a significant association between rs10524523 and
risk of LOAD in
APOE 33 homozygotes but in the opposite direction as the previously reported association (the very long
allele was underrepresented in cases vs controls in this study (P =.004]-RRB-.
11
ApoE4 heterozygotes (people with one
allele) have a five-fold increased
risk of developing AD, and homozygotes (two
alleles) are estimated to have a staggering lifetime
risk between 50 - 90 percent.12 Despite this seemingly damning genetic heritage, the
ApoE4
allele is neither required nor sufficient for development of AD, as 50 percent of people with AD are not carriers, and some E4 homozygotes never develop the disease.13 On the other hand, the other known
risk factor — hyperinsulinism — elevates
risk by 43 percent independently of
ApoE status.
ApoE - 4, a particular allele of the apolipoprotein apoE, is a known risk fac
ApoE - 4, a particular
allele of the apolipoprotein
apoE, is a known risk fac
apoE, is a known
risk factor.