Magnetic Resonance Imaging Assessment of Kidney Oxygenation and Perfusion During Sickle Cell Vaso-occlusive Crises

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• 作者：Jean-Franç ; ois Deux ; MD ; PhD¹ ; ² ; ^&lowast ; ; ^{jean-francois.deux@aphp.fr} ; Vincent Audard ; MD ; PhD³ ; ⁴ ; ^&lowast ; ; Pierre Brugiè ; res ; MD¹ ; Anoosha Habibi ; MD⁵ ; ⁶ ; ⁷ ; Elena-Maria Manea ; MD⁵ ; ⁷ ; Constance Guillaud-Danis ; MD⁷ ; Bertrand Godeau ; MD⁷ ; Fré ; dé ; ric Galacté ; ros ; MD ; PhD⁵ ; ⁶ ; ⁷ ; Thomas Stehlé ; MD³ ; ⁴ ; Philippe Lang ; MD ; PhD³ ; ⁴ ; Philippe Grimbert ; MD ; PhD³ ; ⁴ ; Etienne Audureau ; MD ; PhD⁸ ; Alain Rahmouni ; MD ; PhD¹ ; ² ; Pablo Bartolucci ; MD ; PhD⁵ ; ⁶ ; ⁷
• 关键词：Sickle cell disease (SCD) ; vaso-occlusive crisis (VOC) ; glomerular filtration rate (GFR) ; ischemia-reperfusion ; subclinical kidney injury ; blood oxygen level-dependent (BOLD) ; magnetic resonance imaging (MRI) ; deoxyhemoglobin (deoxyHb) ; diffusion-weighted (DW) ; intravoxel incoherent motion (IVIM) ; sickle cell nephropathy (SCN)
• 刊名：American Journal of Kidney Diseases
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：69
• 期：1
• 页码：51-59
• 全文大小：650 K
• 卷排序：69

文摘

Our understanding of the pathophysiologic processes underlying sickle cell nephropathy remains incomplete. We performed a pilot study to investigate the potential value of magnetic resonance imaging (MRI) for the assessment of kidney oxygenation and detection of potential changes to tissue perfusion and cellular integrity during a vaso-occlusive crisis.Study DesignA case-control study.Setting & Participants10 homozygous patients with sickle cell disease (SCD), without kidney disease (based on estimated glomerular filtration rate and albuminuria), underwent renal MRI during a vaso-occlusive crisis episode. The imaging data obtained were compared with those for a second MRI performed at steady state (median, 56 [IQR, 37-72] days after the vaso-occlusive crisis MRI). The control group consisted of 10 apparently healthy individuals.MeasurementsDeoxyhemoglobin level assessed by R2* value was calculated using the blood oxygen level−dependent technique. The intravoxel incoherent motion diffusion-weighted imaging technique was used to calculate D, D*, and F parameters.ResultsMedian medullary R2* values on steady-state MRI were significantly higher for patients with SCD than for controls (P = 0.01) and did not change significantly during the vaso-occlusive crisis. No significant differences in median cortical R2* values were observed. Both cellular integrity (D) and local perfusion (D* and F) were significantly altered in medullary and cortical areas during vaso-occlusive crises in comparison to steady state in patients with SCD. These parameters did not differ significantly between patients with SCD assessed at steady state and the control group.LimitationsSmall sample size, estimation of glomerular filtration rate according to CKD-EPI creatinine equation without adjustment for race.ConclusionsDeoxyhemoglobin levels in the medullary area are higher in patients with SCD, during vaso-occlusive crises and at steady state, than in controls. Alterations to the tissue perfusion and cellular integrity of renal parenchyma are a common finding during vaso-occlusive crises that provide additional evidence that a vaso-occlusive crisis may be associated with subclinical kidney injury detectable on MRI.