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Richerson WT, Schmit BD, Wolfgram DF. Longitudinal changes in diffusion tensor imaging in hemodialysis patients. Hemodial Int 2024; 28:178-187. [PMID: 38351365 PMCID: PMC11014772 DOI: 10.1111/hdi.13133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 11/14/2023] [Accepted: 01/24/2024] [Indexed: 03/27/2024]
Abstract
INTRODUCTION Hemodialysis patients have increased white matter and gray matter pathology in the brain relative to controls based on MRI. Diffusion tensor imaging is useful in detecting differences between hemodialysis and controls but has not identified the expected longitudinal decline in hemodialysis patients. In this study we implemented specialized post-processing techniques to reduce noise to detect longitudinal changes in diffusion tensor imaging parameters and evaluated for any association with changes in cognition. METHODS We collected anatomical and diffusion MRIs as well as cognitive testing from in-center hemodialysis patients at baseline and 1 year later. Gray matter thickness, white matter volume, and white matter diffusion tensor imaging parameters were measured to identify longitudinal changes. We analyzed the diffusion tensor imaging parameters by averaging the whole white matter and using a pothole analysis. Eighteen hemodialysis patients were included in the longitudinal analysis and 15 controls were used for the pothole analysis. We used the NIH Toolbox Cognition Battery to assess cognitive performance over the same time frame. FINDINGS Over the course of a year on hemodialysis, we found a decrease in white matter fractional anisotropy across the entire white matter (p < 0.01), and an increase in the number of white matter fractional anisotropy voxels below pothole threshold (p = 0.03). We did not find any relationship between changes in whole brain structural parameters and cognitive performance. DISCUSSION By employing noise reducing techniques, we were able to detect longitudinal changes in diffusion tensor imaging parameters in hemodialysis patients. The fractional anisotropy declines over the year indicate significant decreases in white matter health. However, we did not find that declines in fractional anisotropy was associated with declines in cognitive performance.
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Affiliation(s)
- Wesley T Richerson
- Department of Biomedical Engineering, Marquette University and Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Brian D Schmit
- Department of Biomedical Engineering, Marquette University and Medical College of Wisconsin, Milwaukee, Wisconsin, USA
| | - Dawn F Wolfgram
- Department of Medicine, Medical College of Wisconsin, Milwaukee, Wisconsin, USA
- Zablocki Veterans Affairs Medical Center, Milwaukee, Wisconsin, USA
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Richerson WT, Muftuler LT, Wolfgram DF, Schmit BD. Characterization of diffusion MRI using the mean apparent propagator model in hemodialysis patients: A pilot study. Magn Reson Imaging 2023; 102:69-78. [PMID: 37150269 PMCID: PMC10524280 DOI: 10.1016/j.mri.2023.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 04/06/2023] [Accepted: 04/29/2023] [Indexed: 05/09/2023]
Abstract
To better understand documented cognitive decline in hemodialysis (HD) patients, diffusion MRI (dMRI) has been used to characterize brain anatomical deficits relative to controls. Studies to this point have primarily used diffusion tensor imaging (DTI) to model the three-dimensional diffusion of water in HD patients, with DTI parameters reflecting underlying microstructural changes of brain tissue. Since DTI has some limitations in characterizing tissue microstructure, some of which may be complicated by HD, we explored the use of the mean apparent propagator (MAP) model to describe diffusion in HD patients. We collected anatomical T1 and T2 FLAIR MRIs as well as multi-shell dMRI in ten HD participants and ten age-matched controls. The T1 and T2 FLAIR MRIs were used for tissue segmentation and identification of white matter hyperintensity, respectively. Multi-shell dMRI data were used to estimate MAP and DTI diffusion models. Each model was then used to characterize the differences between the HD cohort and the age-matched controls in normal appearing white matter, subcortical gray matter, corpus callosum (CC) and bilateral radiata (Rad). As expected, parameters of both DTI and MAP models of dMRI were significantly different in HD participants compared to controls. However, some MAP parameters suggested additional tissue microstructural changes in HD participants, such as increased axonal diameter. Measurements of non-Gaussianity indicated that MAP provided better a diffusion estimate than DTI, and MAP appeared to provide a more accurate measure of anisotropy in Rad, based on measures of the Rad/CC ratio. In conclusion, parameters of the MAP and DTI models were both sensitive to changes in diffusivity in HD participants compared to controls; however, the MAP model appeared to provide additional detailed information about changes in brain tissue microstructure.
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Affiliation(s)
- Wesley T Richerson
- Department of Biomedical Engineering, Marquette University and Medical College of Wisconsin, Milwaukee, WI, United States of America.
| | - L Tugan Muftuler
- Department of Neurosurgery, Medical College of Wisconsin, Milwaukee, WI, United States of America
| | - Dawn F Wolfgram
- Department of Medicine, Medical College of Wisconsin and Zablocki Veterans Affairs Medical Center, Milwaukee, WI, United States of America
| | - Brian D Schmit
- Department of Biomedical Engineering, Marquette University and Medical College of Wisconsin, Milwaukee, WI, United States of America
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Anazodo UC, Wong DY, Théberge J, Dacey M, Gomes J, Penny JD, van Ginkel M, Poirier SE, McIntyre CW. Hemodialysis-Related Acute Brain Injury Demonstrated by Application of Intradialytic Magnetic Resonance Imaging and Spectroscopy. J Am Soc Nephrol 2023; 34:1090-1104. [PMID: 36890644 PMCID: PMC10278857 DOI: 10.1681/asn.0000000000000105] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 02/11/2023] [Indexed: 03/10/2023] Open
Abstract
SIGNIFICANCE STATEMENT Hemodialysis (HD) results in reduced brain blood flow, and HD-related circulatory stress and regional ischemia are associated with brain injury over time. However, studies to date have not provided definitive direct evidence of acute brain injury during a HD treatment session. Using intradialytic magnetic resonance imaging (MRI) and spectroscopy to examine HD-associated changes in brain structure and neurochemistry, the authors found that multiple white (WM) tracts had diffusion imaging changes characteristic of cytotoxic edema, a consequence of ischemic insult and a precursor to fixed structural WM injury. Spectroscopy showed decreases in prefrontal N -acetyl aspartate (NAA) and choline concentrations consistent with energy deficit and perfusion anomaly. This suggests that one HD session can cause brain injury and that studies of interventions that mitigate this treatment's effects on the brain are warranted. BACKGROUND Hemodialysis (HD) treatment-related hemodynamic stress results in recurrent ischemic injury to organs such as the heart and brain. Short-term reduction in brain blood flow and long-term white matter changes have been reported, but the basis of HD-induced brain injury is neither well-recognized nor understood, although progressive cognitive impairment is common. METHODS We used neurocognitive assessments, intradialytic anatomical magnetic resonance imaging, diffusion tensor imaging, and proton magnetic resonance spectroscopy to examine the nature of acute HD-associated brain injury and associated changes in brain structure and neurochemistry relevant to ischemia. Data acquired before HD and during the last 60 minutes of HD (during maximal circulatory stress) were analyzed to assess the acute effects of HD on the brain. RESULTS We studied 17 patients (mean age 63±13 years; 58.8% were male, 76.5% were White, 17.6% were Black, and 5.9% were of Indigenous ethnicity). We found intradialytic changes, including the development of multiple regions of white matter exhibiting increased fractional anisotropy with associated decreases in mean diffusivity and radial diffusivity-characteristic features of cytotoxic edema (with increase in global brain volumes). We also observed decreases in proton magnetic resonance spectroscopy-measured N -acetyl aspartate and choline concentrations during HD, indicative of regional ischemia. CONCLUSIONS This study demonstrates for the first time that significant intradialytic changes in brain tissue volume, diffusion metrics, and brain metabolite concentrations consistent with ischemic injury occur in a single dialysis session. These findings raise the possibility that HD might have long-term neurological consequences. Further study is needed to establish an association between intradialytic magnetic resonance imaging findings of brain injury and cognitive impairment and to understand the chronic effects of HD-induced brain injury. CLINICAL TRIALS INFORMATION NCT03342183 .
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Affiliation(s)
- Udunna C. Anazodo
- Lawson Health Research Institute, London, Ontario, Canada
- Department of Medical Biophysics, Western University, London, Ontario, Canada
| | - Dickson Y. Wong
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Jean Théberge
- Lawson Health Research Institute, London, Ontario, Canada
- Department of Medical Biophysics, Western University, London, Ontario, Canada
- Department of Medical Imaging, Western University, London, Ontario, Canada
| | - Madeleine Dacey
- Department of Medical Biophysics, Western University, London, Ontario, Canada
| | - Janice Gomes
- Department of Pathology and Laboratory Medicine, Western University, London, Ontario, Canada
- Lilibeth Caberto Kidney Clinical Research Unit, London Health Sciences Centre, London, Ontario, Canada
| | - Jarrin D. Penny
- Department of Medical Biophysics, Western University, London, Ontario, Canada
- Lilibeth Caberto Kidney Clinical Research Unit, London Health Sciences Centre, London, Ontario, Canada
| | - Michael van Ginkel
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Stefan E. Poirier
- Lawson Health Research Institute, London, Ontario, Canada
- Department of Medical Biophysics, Western University, London, Ontario, Canada
| | - Christopher W. McIntyre
- Lawson Health Research Institute, London, Ontario, Canada
- Department of Medical Biophysics, Western University, London, Ontario, Canada
- Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
- Lilibeth Caberto Kidney Clinical Research Unit, London Health Sciences Centre, London, Ontario, Canada
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Gu M, Jin D, Zhong Y, Zhang H, Tong F, Wu J, Chen Y, Zhao Y. Positive coping style reduction in elderly end-stage renal disease patients: mediating role of white matter mean diffusivity. Neuroradiology. [DOI: 10.1007/s00234-022-02904-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Accepted: 01/17/2022] [Indexed: 10/19/2022]
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Wang H, Han X, Li M, Yang ZH, Liu WH, Wang ZC. Long-term hemodialysis may affect enlarged perivascular spaces in maintenance hemodialysis patients: evidence from a pilot MRI study. Quant Imaging Med Surg 2022; 12:341-353. [PMID: 34993083 DOI: 10.21037/qims-20-1246] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2020] [Accepted: 06/23/2021] [Indexed: 11/06/2022]
Abstract
BACKGROUND Hemodialysis (HD) causes various nervous system abnormalities. Alterations in white matter (WM) microstructure after long-term HD have been reported in a few previous studies; however, no studies have been performed to investigate enlarged perivascular spaces (PVS) in WM regions. We measured cerebral blood flow (CBF) and white matter volume (WMV) in HD patients to assess enlarged PVS severity in the WM across the whole brain and suggest possible explanations for this. METHODS Fifty-one HD patients and 51 age-, sex-, and education-matched healthy controls (HCs) were recruited. The number of enlarged PVS in the centrum semiovale (CS), cerebral watershed (CW), and basal ganglia (BG) regions were assessed by T2-weighted MRI. CBF was estimated by arterial spin labeling (ASL), which is a non-invasive perfusion imaging technique. WMV was assessed by the computational anatomy toolbox (CAT12), which is a statistical analysis package. Differences in descriptive variables (two-tailed t-tests, χ2 tests, Mann-Whitney U tests, and Friedman M tests), an intra-class correlation between radiologists, the relationship between enlarged PVS number and HD duration, normalized CBF and WMV (multiple regression), and group differences in CBF and WMV {voxel-wise t-tests with age and sex as covariates [cluster size >50 voxels, false discovery rate (FDR) corrected, P<0.05]} were assessed. RESULTS HD patients displayed a more significant number of CS-PVS and CW-PVS in WM regions compared with the HCs, but there was no significant difference in the number of BG-PVS. The number of CS-PVS and CW-PVS were positively associated with HD duration. The number of CW-PVS was positively associated with CBF changes and WMV alteration in HD patients. Meanwhile, significant differences in the blood pressure (BP) readings pre-HD, intra-HD, and post-HD were observed in HD patients. Compared with the HCs, the HD patients showed higher CBF in the CS, CW, and BG regions (P<0.05). Hence, decreased WMV in the CS, CW, and BG regions were shown in the HD patients compared with the HCs (P<0.05). CONCLUSIONS Enlarged CS-PVS and CW-PVS on MRI might be a feature of long-term HD patients. Enlarged CW-PVS number is associated with higher CBF in the CW region and lower WMV in the CW region in HD patients.
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Affiliation(s)
- Hao Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Xue Han
- Department of Nephrology, Faculty of Kidney Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Mingan Li
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zheng-Han Yang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Wen-Hu Liu
- Department of Nephrology, Faculty of Kidney Diseases, Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Zhen-Chang Wang
- Department of Radiology, Beijing Friendship Hospital, Capital Medical University, Beijing, China
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Lijdsman S, Königs M, van Sandwijk MS, Bouts AH, van Hoeck K, de Jong H, Engelen M, Oosterlaan J, Bemelman FJ, Oostrom KJ, Groothoff JW. Structural brain abnormalities in children and young adults with severe chronic kidney disease. Pediatr Nephrol 2022; 37:1125-1136. [PMID: 34800137 PMCID: PMC9023396 DOI: 10.1007/s00467-021-05276-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/22/2021] [Revised: 08/13/2021] [Accepted: 08/31/2021] [Indexed: 12/01/2022]
Abstract
BACKGROUND The pathophysiology of neurological dysfunction in severe chronic kidney disease (CKD) in children and young adults is largely unknown. We aimed to investigate brain volumes and white matter integrity in this population and explore brain structure under different treatment modalities. METHODS This cross-sectional study includes 24 patients with severe CKD (eGFR < 30) aged 8-30 years (median = 18.5, range = 9.1-30.5) on different therapy modalities (pre-dialysis, n = 7; dialysis, n = 7; transplanted, n = 10) and 21 healthy controls matched for age, sex, and parental educational level. Neuroimaging targeted brain volume using volumetric analysis on T1 scans and white matter integrity with tract-based spatial statistics and voxel-wise regression on diffusion tensor imaging (DTI) data. RESULTS CKD patients had lower white matter integrity in a widespread cluster of primarily distal white matter tracts compared to healthy controls. Furthermore, CKD patients had smaller volume of the nucleus accumbens relative to healthy controls, while no evidence was found for abnormal volumes of gray and white matter or other subcortical structures. Longer time since successful transplantation was related to lower white matter integrity. Exploratory analyses comparing treatment subgroups suggest lower white matter integrity and smaller volume of the nucleus accumbens in dialysis and transplanted patients relative to healthy controls. CONCLUSIONS Young CKD patients seem at risk for widespread disruption of white matter integrity and to some extent smaller subcortical volume (i.e., nucleus accumbens). Especially patients on dialysis therapy and patients who received a kidney transplant may be at risk for disruption of white matter integrity and smaller volume of the nucleus accumbens.
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Affiliation(s)
- Sophie Lijdsman
- Department of Child and Adolescent Psychiatry & Psychosocial Care, Amsterdam Reproduction & Development, Emma Children's Hospital, Amsterdam University Medical Centers (Amsterdam UMC), University of Amsterdam, G8-136, PO Box 22660, 1100 DD, Amsterdam, Netherlands.
| | - Marsh Königs
- Emma Neuroscience Group, Department of Pediatrics, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Marit S. van Sandwijk
- Department of Nephrology, Amsterdam Infection & Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands ,Dianet Dialysis Centre, Amsterdam, Netherlands
| | - Antonia H. Bouts
- Department of Pediatric Nephrology, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Koen van Hoeck
- Department of Pediatrics, University Hospital Antwerp, Edegem, Belgium
| | - Huib de Jong
- Department of Pediatrics, Sophia Children’s Hospital, Erasmus MC, Rotterdam, Netherlands
| | - Marc Engelen
- Department of Pediatric Neurology, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Jaap Oosterlaan
- Emma Neuroscience Group, Department of Pediatrics, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Frederike J. Bemelman
- Department of Nephrology, Amsterdam Infection & Immunity, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
| | - Kim J. Oostrom
- Department of Child and Adolescent Psychiatry & Psychosocial Care, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam University Medical Centers (Amsterdam UMC), University of Amsterdam, G8-136, PO Box 22660, 1100 DD Amsterdam, Netherlands
| | - Jaap W. Groothoff
- Department of Pediatric Nephrology, Amsterdam Reproduction & Development, Emma Children’s Hospital, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands
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Pépin M, Ferreira AC, Arici M, Bachman M, Barbieri M, Bumblyte IA, Carriazo S, Delgado P, Garneata L, Giannakou K, Godefroy O, Grodzicki T, Klimkowicz-Mrowiec A, Kurganaite J, Liabeuf S, Mocanu CA, Paolisso G, Spasovski G, Vazelov ES, Viggiano D, Zoccali C, Massy ZA, Więcek A. Cognitive disorders in patients with chronic kidney disease: specificities of clinical assessment. Nephrol Dial Transplant 2021; 37:ii23-ii32. [PMID: 34718757 PMCID: PMC8713156 DOI: 10.1093/ndt/gfab262] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Indexed: 12/20/2022] Open
Abstract
Neurocognitive disorders are frequent among chronic kidney disease (CKD) patients. Identifying and characterizing cognitive impairment (CI) can help to assess the ability of adherence to CKD risk reduction strategy, identify potentially reversible causes of cognitive decline, modify pharmacotherapy, educate the patient and caregiver and provide appropriate patient and caregiver support. Numerous factors are associated with the development and progression of CI in CKD patients and various conditions can influence the results of cognitive assessment in these patients. Here we review clinical warning signs that should lead to cognitive screening; conditions frequent in CKD at risk to interfere with cognitive testing or performance, including specificities of cognitive assessment in dialysis patients or after kidney transplantation; and available tests for screening and observed cognitive patterns in CKD patients.
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Affiliation(s)
| | - Ana Carina Ferreira
- Department of Nephrology, Centro Hospitalar e Universitário de Lisboa Central–Hospital Curry Cabral, Lisbon, Portugal
- Department of Nephology, Universidade Nova de Lisboa–Faculdade de Ciências Médicas, Lisbon, Portugal
| | - Mustafa Arici
- Department of Internal Medicine, Division of Nephrology, Faculty of Medicine, Hacetepe University, Ankara, Turkey
| | - Maie Bachman
- Department of Health Technologies, School of Information Technologies, Tallinn University of Technology, Tallinn, Estonia
| | - Michelangela Barbieri
- Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, Naples, Italy
| | - Inga Arune Bumblyte
- Department of Nephrology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Sol Carriazo
- Department of Nephrology and Hypertension, IIS-Fundacion Jimenez Diaz UAM, Madrid, Spain
| | - Pilar Delgado
- Department of Neurology, Vall d’Hebron Hospital, Universitat Autonoma de Barcelona, Barcelona, Spain
| | - Liliana Garneata
- Department of Internal Medicine and Nephrology, “Carol Davila” University of Medicine and Pharmacy, “Dr Carol Davila” Teaching Hospital of Nephrology, Bucharest, Romania
| | - Konstantinos Giannakou
- Department of Health Sciences, School of Sciences, European University Cyprus, Nicosia, Cyprus
| | - Olivier Godefroy
- Department of Neurology, Amiens University Hospital, and Laboratory of Functional Neurosciences (UR UPJV 4559), Jules Verne University of Picardie, Amiens, France
| | - Tomasz Grodzicki
- Department of Internal Medicine and Gerontology, Jagiellonian University Medical College, Cracow, Poland
| | | | - Justina Kurganaite
- Department of Nephrology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Sophie Liabeuf
- Department of Pharmacology, Amiens University Medical Center, Amiens, France
- MP3CV Laboratory, EA7517, University of Picardie Jules Verne, Amiens, France
| | - Carmen Antonia Mocanu
- Department of Internal Medicine and Nephrology, “Carol Davila” University of Medicine and Pharmacy, “Dr Carol Davila” Teaching Hospital of Nephrology, Bucharest, Romania
| | - Giuseppe Paolisso
- Department of Advanced Medical and Surgical Sciences, University of Campania “Luigi Vanvitelli”, Naples, Italy
- Mediterranea Cardiocentro, Naples, Italy
| | - Goce Spasovski
- Department of Nephrology, Clinical Centre “Mother Theresa”, Saints Cyril and Methodius University, Skopje, North Macedonia
| | | | - Davide Viggiano
- Department of Nephrology, University of Campania “Luigi Vanvitelli”, Naples; BIOGEM, Ariano Irpino, Italy
| | - Carmine Zoccali
- Renal Research Institute, New York, NY, USA
- Associazione Ipertensione Nefrologia Trapianto Renale, Reggio Calabria, Italy
| | - Ziad A Massy
- Paris-Saclay University, UVSQ, Inserm, Clinical Epidemiology Team, Centre de Recherche en Epidémiologie et Santé des Populations (CESP), Villejuif, France
- Department of Nephrology, Ambroise Paré University Medical Center, APHP, Paris, France
| | - Andrzej Więcek
- Department of Nephrology, Transplantation and Internal Medicine, Medical University of Silesia, Katowice, Poland
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Mu J, Ma L, Ma S, Ding D, Li P, Ma X, Zhang M, Liu J. Neurological effects of hemodialysis on white matter microstructure in end-stage renal disease. Neuroimage Clin 2021; 31:102743. [PMID: 34229157 PMCID: PMC8261074 DOI: 10.1016/j.nicl.2021.102743] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 06/21/2021] [Accepted: 06/22/2021] [Indexed: 11/29/2022]
Abstract
OBJECTIVES To detect the effects of hemodialysis (HD) on the central nervous system (CNS), the present study forces the memory storage capacity and the difference in white matter (WM) microstructure characteristics among end-stage renal disease (ESRD) participants before HD initiation (ESRD-BHD), ESRD participants with maintenance HD (ESRD-MHD), and healthy participants (HCs). METHODS Between 2016 and 2018, 56 ESRD-BHD, 39 ESRD-MHD, and 56 HCs were recruited for this study. The fractional anisotropy (FA) of tractography streamlines within the working memory network was investigated using a novel along-tracts analysis method. The relationship between WM microstructure and working memory scores, measured from an n-back task, were detected by multiple correlation analysis. RESULTS As compared with HCs, a significantly lower FA was found along part of the WM in the working memory network in ESRD-BHD. In the group-difference location of ESRD-BHD and HCs, the FA of ESRD-MHD was reversed to normal levels in HCs. However, the FA in a new location was differentially reduced across groups: highest in HCs, intermediate in ESRD-BHD, and lowest in ESRD-MHD. Correlation analysis showed that a longer reaction time correlated to a lower FA, according to the following pattern: ESRD-BHD > ESRD-MHD > HCs. CONCLUSION Despite the persisting abnormal brain structure, our findings suggest HD has a neuroprotective effect in ESRD patients.
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Affiliation(s)
- Junya Mu
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an 710126, People's Republic of China; Engineering Research Center of Molecular & Neuroimaging, Ministry of Education, Xi'an 710126, People's Republic of China
| | - Liang Ma
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an 710126, People's Republic of China; Engineering Research Center of Molecular & Neuroimaging, Ministry of Education, Xi'an 710126, People's Republic of China
| | - Shaohui Ma
- Department of Medical Imaging, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, People's Republic of China
| | - Dun Ding
- Department of Medical Imaging, Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, People's Republic of China
| | - Peng Li
- Department of Medical Imaging, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, People's Republic of China; Department of Medical Imaging, Shaanxi Nuclear Geology 215 Hospital, Xianyang, People's Republic of China
| | - Xueying Ma
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010000, People's Republic of China
| | - Ming Zhang
- Department of Medical Imaging, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, People's Republic of China.
| | - Jixin Liu
- Center for Brain Imaging, School of Life Science and Technology, Xidian University, Xi'an 710126, People's Republic of China; Engineering Research Center of Molecular & Neuroimaging, Ministry of Education, Xi'an 710126, People's Republic of China.
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Chai C, Zhang M, Wang H, Li J, Zhang T, Han Y, Zhu J, Zhang X, Xia S, Shen W. Increased cerebral blood flow is correlated with neurocognitive impairment in long-term hemodialysis patients: an arterial spin labeling MRI study. Brain Imaging Behav 2021; 15:1828-39. [PMID: 32909105 DOI: 10.1007/s11682-020-00377-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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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