Evaluation of renal cold ischemia-reperfusion injury with intravoxel incoherent motion diffusion-weighted imaging and blood oxygenation level-dependent MRI in a rat model

被引:5
作者
Ren, Yan [1 ]
Chen, Lihua [1 ]
Yuan, Yizhong [2 ]
Xu, Jipan [3 ]
Xia, Fangjie [3 ]
Zhu, Jinxia [4 ]
Shen, Wen [1 ]
机构
[1] Tianjin First Cent Hosp, Tianjin Inst Imaging Med, Dept Radiol, Tianjin, Peoples R China
[2] Tianjin Med Univ, Dept Radiol, Gen Hosp, Tianjin, Peoples R China
[3] Tianjin Med Univ, Tianjin Inst Imaging Med, Dept Radiol, Cent Hosp 1, Tianjin, Peoples R China
[4] Siemens Healthcare Ltd, MR Collaborat, Beijing, Peoples R China
基金
中国国家自然科学基金;
关键词
cold ischemia; reperfusion injury; IVIM; BOLD; kidney; ACUTE KIDNEY INJURY; PERFUSION; ISCHEMIA/REPERFUSION; TRANSPLANTATION; PATHWAYS; FIBROSIS; DISEASE; DAMAGE;
D O I
10.3389/fphys.2023.1159741
中图分类号
Q4 [生理学];
学科分类号
071003 ;
摘要
Purpose: Cold ischemia-reperfusion injury (CIRI) is one of the most serious complications following renal transplantation. The current study investigated the feasibility of Intravoxel Incoherent Motion (IVIM) imaging and blood oxygenation level-dependent (BOLD) in the evaluation of different degrees of renal cold ischemia-reperfusion injury in a rat model.Methods: Seventy five rats were randomly divided into three groups (N = 25 for each group): T0: sham-operated group, T2/T4: CIRI groups with different cold ischemia hours (2, 4 h, respectively). The rat model of CIRI group was established by left kidney cold ischemia with right nephrectomy. All the rats received a baseline MRI before the surgery. Five rats in each group were randomly selected to undergo an MRI examination at 1 h, day 1, day 2 and day 5 after CIRI. The IVIM and BOLD parameters were studied in the renal cortex (CO), the outer stripe of the outer medulla (OSOM), and the inner stripe of the outer medulla (ISOM) followed by histological analysis to examine Paller scores, peritubular capillary (PTC) density, apoptosis rate and biochemical indicators to obtain the contents of serum creatinine (Scr), blood urea nitrogen (BUN), superoxide dismutase (SOD) and malondialdehyde (MDA).Results: The D, D*, PF and T2* values in the CIRI groups were lower than those in the sham-operated group at all timepoints (all p < 0.05). The prolonged cold ischemia times resulted in gradually lower D, D*, PF and T2* values (all p < 0.05). The D and T2* values of cortex and OSOM in Group T0 and T2 returned to the baseline level (all p > 0.05) except Group T4. The D* and PF values of cortex, OSOM and ISOM in Group T2 and T4 still remained below the normal levels (all p < 0.05) except Group T0. D, D*, PF and T2* values were strongly correlated with histopathological (Paller scores, PTC density and apoptosis rate) and the biochemistry indicators (SOD and MDA) (|r|>0.6, p < 0.001). D*, PF and T2* values were moderately to poorly correlated with some biochemistry indicators (Scr and BUN) (|r|<0.5, p < 0.05).Conclusion: IVIM and BOLD can serve as noninvasive radiologic markers for monitoring different degrees of renal impairment and recovery after renal CIRI.
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页数:13
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