Abstract
The purpose of this study was to investigate cerebral blood flow (CBF) changes in hemodialysis patients with arterial spin labeling (ASL) and to correlate these changes with clinical risk factors and neurocognitive function. Thirty-two hemodialysis patients and 35 age-, sex-, and education-matched healthy controls (HCs) were recruited in this prospective study. The Mini-Mental State Examination (MMSE) was performed to evaluate neurocognitive function. Pulsed ASL was performed to measure CBF. Two independent sample t-test was used to explore the CBF difference between the patients and HCs. Multiple stepwise regression was used to investigate the risk factors for CBF in patients. Correlation analysis was used to explore the relationship between the MMSE scores and CBF changes with and without adjusting for anemia status. Compared to HCs, the hemodialysis patients showed significantly increased CBF in some neurocognition-related cerebral regions (all P < 0.001, Bonferroni corrected). Increased CBF in the right opercular and triangular part of the inferior frontal gyrus correlated with the poorer MMSE scores (r = -0.502, P = 0.004; r = -0.423, P = 0.018, FDR corrected) and these correlations still remained after adjusting for anemia status (r = -0.516, P = 0.005; r = -0.439, P = 0.019, FDR corrected). The increased dialysis duration, and decreased hemoglobin, hematocrit, and serum phosphorus were predictive risk factors for increased CBF (P < 0.05). In conclusion, long-term hemodialysis patients had increased CBF, which correlated with neurocognitive impairment, and after adjusting for the effect of anemia, the correlation still remained.
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Abbreviations
- ESRD:
-
End-stage renal disease
- GFR:
-
glomerular filtration rate
- CBF:
-
cerebral blood flow
- PET:
-
positron emission tomography
- SPECT:
-
single-photon emission computed tomography
- TCD:
-
transcranial Doppler ultrasonography
- CT:
-
computed tomography
- ASL:
-
arterial spin labeling
- rHuEpo:
-
recombinant human erythropoietin
- HCs:
-
healthy controls
- PTH:
-
parathyroid hormone
- ALP:
-
alkaline phosphatase
- SBP:
-
systolic blood pressure
- DBP:
-
diastolic blood pressure
- PP:
-
pulse pressure
- MMSE:
-
Mini-Mental State Examination
- AC-PC:
-
anterior-posterior commissural
- T1-MPRAGE:
-
T1-weighted magnetization-prepared rapid acquisition gradient echo
- FWHM:
-
a full width at half-maximum
- MNI:
-
Montreal Neurological Institute
- VIF:
-
variance inflation factor
- FDR:
-
false discovery rate
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Acknowledgements
This work was supported by the Natural Scientific Foundation of China (Grant No. 81901728 to Chao Chai, No. 81871342 to Shuang Xia, and No. 81873888 to Wen Shen) and National Key Technologies Research and Development Program of China (Grant No. 2019YFC0120901 to Shuang Xia).
The authors would like to thank Gang Zheng and TianYi Qian for the analysis of the data, and Prof. E Mark Haacke, from Department of Radilogy, Wayne State University for the editing of the paper.
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Supplementary Fig. 1
There are no significant correlations between CBF of the bilateral hippocampus and the MMSE scores before adjusting for hemoglobin and hematocrit levels (left: r = -0.195, P = 0.284; right: r = -0.136, P = 0.458, FDR corrected). (PNG 4331 kb)
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Chai, C., Zhang, M., Wang, H. et al. Increased cerebral blood flow is correlated with neurocognitive impairment in long-term hemodialysis patients: an arterial spin labeling MRI study. Brain Imaging and Behavior 15, 1828–1839 (2021). https://doi.org/10.1007/s11682-020-00377-5
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DOI: https://doi.org/10.1007/s11682-020-00377-5