Abstract
Objectives
Acute cellular rejection (ACR) is a major immune occurrence post-liver transplant that can cause abnormal liver function. Blood oxygen level-dependent (BOLD) magnetic resonance imaging (MRI) can be used to evaluate liver disease, but it has not been utilized in the diagnosis of ACR post-liver transplant. Therefore, the purpose of this study is to evaluate the diagnostic performance of BOLD MRI and to monitor treatment response in recipients with ACR.
Methods
This prospective study was approved by the local institutional review board. Fifty-five recipients with highly suspected ACR were enrolled in this study. Each patient underwent hepatic BOLD MRI, blood biochemistry, and biopsy before treatment. Of 55 patients, 19 recipients with ACR received a follow-up MRI after treatment. After obtaining the R2* maps, five regions-of-interest were placed on liver parenchyma to estimate the mean R2* values for statistical analysis. Receiver operating characteristic curve (ROC) analysis was performed to assess the diagnostic performance of R2* values in detecting patients with ACR.
Results
The histopathologic results showed that 27 recipients had ACR (14 mild, 11 moderate, and 2 severe) and their hepatic R2* values were significantly lower than those of patients without ACR. ROC analysis revealed that the sensitivity and specificity of the R2* values for detection of ACR were 82.1% and 89.9%, respectively. Moreover, the R2* values and liver function in patients with ACR significantly increased after immunosuppressive treatment.
Conclusion
The non-invasive BOLD MRI technique may be useful for assessment of hepatic ACR and monitoring of treatment response after immunosuppressive therapy.
Key Points
• Patients with acute cellular rejection post-liver transplant exhibited significantly decreased R2* values in liver parenchyma.
• R2* values and liver function were significantly increased after immunosuppressive therapy.
• R2* values were constructive indicators in detecting acute cellular rejection due to their high sensitivity and specificity.
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Change history
23 June 2023
A Correction to this paper has been published: https://doi.org/10.1007/s00330-023-09670-5
Abbreviations
- ACR:
-
Acute cellular rejection
- ALT:
-
Alanine aminotransferase
- AST:
-
Aspartate aminotransferase
- BOLD :
-
Blood oxygenation level dependent
- DDLT:
-
Deceased donor liver transplantation
- LDLT :
-
Living donor liver transplantation
- MRI :
-
Magnetic resonance imaging
- PLT :
-
Platelet
- RAI:
-
Rejection activity index
- ROC:
-
Receiver operating characteristic
- ROI:
-
Regions-of-interest
- T-bil :
-
Total bilirubin
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The scientific guarantor of this publication is Yu-Fan Cheng.
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The original online version of this article was revised: in the section 'Materials and Methods', the sentence "This prospective study was approved by the Chang Gung Medical Foundation Institutional review board (201701554B0) and informed consent was obtained from all patients" was corrected to "This prospective study was approved by the Chang Gung Medical Foundation Institutional review board (201700785B0) and informed consent was obtained from all patients.
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Chiang, HJ., Chou, MC., Chuang, YH. et al. Use of blood oxygen level-dependent magnetic resonance imaging to detect acute cellular rejection post-liver transplantation. Eur Radiol 32, 4547–4554 (2022). https://doi.org/10.1007/s00330-022-08574-0
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DOI: https://doi.org/10.1007/s00330-022-08574-0