4 research outputs found
Individual and meanĀ±SD <sup>18</sup>F-DPA-714 DVR values obtained for the 8 healthy controls and the 10 ALS patients and results of Mann-Whitney test.
<p>DVR: Distribution of volume ratios -SD: Standard deviation.</p><p>Mann-Whitney-test: comparison between HC subjects (nā=ā8) and ALS patients (nā=ā10).</p
Individual DVR values for the two motor cortex regions and the temporal cortex obtained for all subjects.
<p>These are the regions where statistically significant differences were observed between the two groups studied.</p
Parametric (DVR) 18F-DPA-714 images (axial, coronal and sagittal slices) obtained for a healthy volunteer and an ALS patient, respectively.
<p>Note the significant but normal 18F-DPA-714 uptake in nasal epithelium (a tissue rich in TSPO).</p
PiB-Conjugated, Metal-Based Imaging Probes: Multimodal Approaches for the Visualization of Ī²āAmyloid Plaques
In
an effort toward the visualization of Ī²-amyloid plaques
by in vivo imaging techniques, we have conjugated an optimized derivative
of the Pittsburgh compound B (PiB), a well-established marker of AĪ²
plaques, to DO3A-monoamide that is capable of forming stable, noncharged
complexes with different trivalent metal ions including Gd<sup>3+</sup> for MRI and <sup>111</sup>In<sup>3+</sup> for SPECT applications.
Proton relaxivity measurements evidenced binding of GdĀ(DO3A-PiB) to
the amyloid peptide AĪ²<sub>1ā40</sub> and to human serum
albumin, resulting in a two- and four-fold relaxivity increase, respectively.
Ex vivo immunohistochemical studies showed that the DO3A-PiB complexes
selectively target AĪ² plaques on Alzheimerās disease
human brain tissue. Ex vivo biodistribution data obtained for the <sup>111</sup>In-analogue pointed to a moderate bloodābrain barrier
(BBB) penetration in adult male Swiss mice (without amyloid deposits)
with 0.36% ID/g in the cortex at 2 min postinjection