目前檢測人體腹部脂肪和肝臟脂肪含量的金標準是MRI
and CT。小鼠的身體脂肪通常由定量核磁共振法quantitative magnetic resonance (QMR)
所測量,該技術測量精確,不需對動物麻醉且測量速度快,但是無法區分皮下脂肪和內臟脂肪,因此在本次實驗中,我們使用LaTheta
LCT-200來區分腹部脂肪及皮下脂肪并對兩部分脂肪進行定量研究,同時我們也用該儀器測量了肝臟脂肪含量及棕色脂肪情況。
Figure1.
Quantification of hepatic fat by CT. Selected areas of liver (A; blue),
spleen (B; red) and WAT (C; green) for determination of mean HU values.
upper panel (1): raw gray scale scan slices, lower panel (2): selected
organ parts used in calculation of liver fat. (D) Relationship between
amounts of intrahepatic fat isolated and quantified with biochemical
analysis and estimations by computed tomography. Dashed line – identity
line,r2 - coefficient of determination.
Figure
2. Brown adipose tissue. Correlation between resected brown adipose
tissue (BAT) weighted on scale and estimations of fat depotweights by
CT. (A) BAT depot in situ (interscapular), (B) resected BAT depot
inserted under the liver, (C) resected BAT depot inserted in gonadal
fatdepot; dashed line – identity line, r2 - coefficient of
determination. (D) Analysis examples of two different slices of
interscapular brown adipose tissuedepot by ImageJ (NIH) program. Upper
panel: raw gray scale scan slices, lower panel: manually outlined and
selected BAT in ImageJ (NIH).