Quantitative characterization of glomerular fibrosis with magnetic resonance imaging: a feasibility study in a rat glomerulonephritis model.
Quantitative characterization of glomerular fibrosis with magnetic resonance imaging: a feasibility study in a rat glomerulonephritis model.
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磁共振成像对肾小球纤维化的定量表征:大鼠肾小球肾炎模型的可行性研究。
DOI:
10.1152/ajprenal.00529.2017
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
Zhang,JeffL
中科院分区:
文献类型:
--
作者:
Conlin,ChristopherC;Huang,Yufeng;Gordon,BrianAdamJamison;Zhang,JeffL
Glomerular fibrosis occurs in the early stages of multiple renal diseases, including hypertensive and diabetic nephropathy. Conventional assessment of glomerular fibrosis relies on kidney biopsy, which is invasive and does not reflect physiological aspects such as blood perfusion. In this study, we sought to assess potential changes of cortical perfusion and microstructure at different degrees of glomerular fibrosis using magnetic resonance imaging (MRI). A rat model of glomerular fibrosis was induced by injecting anti-Thy-1 monoclonal antibody OX-7 to promote mesangial extracellular matrix proliferation. For six rats onday 5and five rats onday 12after the induction, we measured renal cortical perfusion and spin-spin relaxation time (T2) in a 3-Tesla MRI scanner. T2reflects tissue microstructural changes. Glomerular fibrosis severity was evaluated by histological analysis and proteinuria. Four rats without fibrosis were included as controls. In the control rats, the periodic acid-Schiff (PAS)-positive area was 22 ± 1% of total glomerular tuft, which increased significantly to 56 ± 12% and 45 ± 10% in theday 5andday 12fibrotic groups, respectively (P< 0.01). For the three groups (control,day 5, andday 12after OX-7 injection), cortical perfusion was 7.27 ± 2.54, 3.78 ± 2.17, and 3.32 ± 2.62 ml·min−1·g−1, respectively, decreasing with fibrosis severity (P< 0.01), and cortical T2was 75.2 ± 4.6, 84.1 ± 3.0, and 87.9 ± 5.6 ms, respectively (P< 0.01). In conclusion, extracellular matrix proliferation in glomerular mesangial cells severely diminished blood flow through the glomeruli and also altered cortical microstructure to increase cortical T2. The MRI-measured parameters are proven to be sensitive markers for characterizing glomerular fibrosis.
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DOI:
--
发表时间:
1982
期刊:
Somatic Cell Genetics
影响因子:
--
作者:
O. Pereira;James R. Smith
通讯作者:
James R. Smith
影响因子:
3.7
作者:
C. K. Drescher;James R. Smith
通讯作者:
James R. Smith
DOI:
10.1093/geronj/34.3.323
发表时间:
1979
期刊:
Journal of gerontology
影响因子:
--
作者:
T. Matsumura;E. Pfendt;L. Hayflick
通讯作者:
L. Hayflick
影响因子:
3.7
作者:
R. Yanishevsky;Gretchen H. Stein
通讯作者:
Gretchen H. Stein
影响因子:
3.7
作者:
M. Lieberman;D. Raben;L. Glaser
通讯作者:
L. Glaser