Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 41-52 |
| Journal | Magnetic Resonance in Medicine |
| Volume | 60 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2008 |
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1.4T study of proton magnetic relaxation rates, iron concentrations, and plaque burden in Alzheimer's disease and control postmortem brain tissue. / House, Mike; St Pierre, Tim; Mclean, C.
In: Magnetic Resonance in Medicine, Vol. 60, No. 1, 2008, p. 41-52.Research output: Contribution to journal › Article
TY - JOUR
T1 - 1.4T study of proton magnetic relaxation rates, iron concentrations, and plaque burden in Alzheimer's disease and control postmortem brain tissue
AU - House, Mike
AU - St Pierre, Tim
AU - Mclean, C.
PY - 2008
Y1 - 2008
N2 - We measured proton magnetic longitudinal (R-1) and transverse (R-2) relaxation rates at 1.4T, iron concentrations, water contents, and amyloid plaque densities in postmortem brain tissue samples from three Alzheimer's disease (AD), two possible AD, and five control subjects. Iron concentrations and R, were significantly higher in the temporal cortex region of our AD group compared to the controls. Frequency analyses showed that the observed trends of higher iron, R-1, and R-2 in AD gray matter regions were statistically significant. Simple regression models indicated that for AD and control gray matter the iron concentrations and water contents have significant linear correlations with R, and R2. Multiple regression models based on iron concentrations and water contents were highly significant for all groups and tissue types and suggested that the effects of iron become more important in determining R, and R2 in the AD samples. At 1.4T R-1 and R-2 are strongly affected by water content and to a lesser extent by variations in iron concentrations. The AD plaque density did not correlate with iron concentrations, water contents, R-1, or R-2, suggesting that increases in AD brain iron are not strongly related to the accumulation of amyloid plaques.
AB - We measured proton magnetic longitudinal (R-1) and transverse (R-2) relaxation rates at 1.4T, iron concentrations, water contents, and amyloid plaque densities in postmortem brain tissue samples from three Alzheimer's disease (AD), two possible AD, and five control subjects. Iron concentrations and R, were significantly higher in the temporal cortex region of our AD group compared to the controls. Frequency analyses showed that the observed trends of higher iron, R-1, and R-2 in AD gray matter regions were statistically significant. Simple regression models indicated that for AD and control gray matter the iron concentrations and water contents have significant linear correlations with R, and R2. Multiple regression models based on iron concentrations and water contents were highly significant for all groups and tissue types and suggested that the effects of iron become more important in determining R, and R2 in the AD samples. At 1.4T R-1 and R-2 are strongly affected by water content and to a lesser extent by variations in iron concentrations. The AD plaque density did not correlate with iron concentrations, water contents, R-1, or R-2, suggesting that increases in AD brain iron are not strongly related to the accumulation of amyloid plaques.
U2 - 10.1002/mrm.21586
DO - 10.1002/mrm.21586
M3 - Article
VL - 60
SP - 41
EP - 52
JO - Magnetic Resonance in Medicine
JF - Magnetic Resonance in Medicine
SN - 0740-3194
IS - 1
ER -