1
|
Hemodialyzed Individuals' Left Spatial Attentional Bias Is Normalized Following Successful Kidney Transplantation. Cogn Behav Neurol 2022; 35:32-39. [PMID: 35239597 DOI: 10.1097/wnn.0000000000000290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 04/28/2021] [Indexed: 11/25/2022]
Abstract
BACKGROUND Healthy people have a leftward spatial attentional bias, called pseudoneglect. Individuals with end-stage renal disease (ESRD) who are receiving hemodialysis often demonstrate an increase in their leftward spatial attentional bias. Whereas a successful kidney transplant often improves the cognitive functions of individuals who previously received hemodialysis, the effect of a kidney transplant on this abnormal allocation of spatial attention has not been investigated. OBJECTIVE To investigate the effects of kidney transplant on individuals who were being treated with dialysis and had an increase in their left spatial attentional bias. METHOD The performance of 20 hemodialyzed individuals with ESRD on the line bisection test was compared to that of 17 demographically matched individuals with ESRD, who had received a kidney transplant, and 23 demographically matched healthy controls (HC). RESULTS All of the participants exhibited a left spatial bias on the line bisection task. When compared with the HC, the hemodialyzed individuals demonstrated a significantly greater left spatial bias. There was, however, no difference in spatial bias between the HC and the individuals who had received a kidney transplant. CONCLUSION A successful kidney transplant can improve patients' abnormal leftward allocation of spatial attention. However, future studies are needed to better understand the mechanisms of this spatial attentional bias in hemodialyzed individuals and the normalization of bias following transplantation.
Collapse
|
2
|
Stanciu GD, Ababei DC, Bild V, Bild W, Paduraru L, Gutu MM, Tamba BI. Renal Contributions in the Pathophysiology and Neuropathological Substrates Shared by Chronic Kidney Disease and Alzheimer's Disease. Brain Sci 2020; 10:E563. [PMID: 32824404 PMCID: PMC7464898 DOI: 10.3390/brainsci10080563] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/04/2020] [Accepted: 08/14/2020] [Indexed: 12/11/2022] Open
Abstract
Chronic kidney disease and Alzheimer's disease are chronic conditions highly prevalent in elderly communities and societies, and a diagnosis of them is devastating and life changing. Demanding therapies and changes, such as non-compliance, cognitive impairment, and non-cognitive anomalies, may lead to supplementary symptoms and subsequent worsening of well-being and quality of life, impacting the socio-economic status of both patient and family. In recent decades, additional hypotheses have attempted to clarify the connection between these two diseases, multifactorial in their nature, but even so, the mechanisms behind this link are still elusive. In this paper, we sought to highlight the current understanding of the mechanisms for cognitive decline in patients with these concurrent pathologies and provide insight into the relationship between markers related to these disease entities and whether the potential biomarkers for renal function may be used for the diagnosis of Alzheimer's disease. Exploring detailed knowledge of etiologies, heterogeneity of risk factors, and neuropathological processes associated with these conditions opens opportunities for the development of new therapies and biomarkers to delay or slow their progression and validation of whether the setting of chronic kidney disease could be a potential determinant for cognitive damage in Alzheimer's disease.
Collapse
Affiliation(s)
- Gabriela Dumitrita Stanciu
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania; (G.D.S.); (B.-I.T.)
| | - Daniela Carmen Ababei
- Pharmacodynamics and Clinical Pharmacy Department, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania;
| | - Veronica Bild
- Pharmacodynamics and Clinical Pharmacy Department, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania;
| | - Walther Bild
- Department of Physiology, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania;
| | - Luminita Paduraru
- Department Mother & Child Care, Division Neonatology, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania
| | - Mihai Marius Gutu
- Department of Biophysics and Medical Physics-Nuclear Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania;
| | - Bogdan-Ionel Tamba
- Center for Advanced Research and Development in Experimental Medicine (CEMEX), “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania; (G.D.S.); (B.-I.T.)
- Department of Pharmacology, Clinical Pharmacology and Algesiology, “Grigore T. Popa” University of Medicine and Pharmacy, 16 Universitatii street, 700115 Iasi, Romania
| |
Collapse
|
5
|
O'Lone E, Connors M, Masson P, Wu S, Kelly PJ, Gillespie D, Parker D, Whiteley W, Strippoli GFM, Palmer SC, Craig JC, Webster AC. Cognition in People With End-Stage Kidney Disease Treated With Hemodialysis: A Systematic Review and Meta-analysis. Am J Kidney Dis 2016; 67:925-35. [PMID: 26919914 DOI: 10.1053/j.ajkd.2015.12.028] [Citation(s) in RCA: 162] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 12/28/2015] [Indexed: 11/11/2022]
Abstract
BACKGROUND Cognitive impairment is associated with poorer quality of life, risk for hospitalization, and mortality. Cognitive impairment is common in people with end-stage kidney disease treated with hemodialysis, yet the severity and specific cognitive deficits are uncertain. STUDY DESIGN Systematic review and meta-analysis. SETTING & POPULATION Adults receiving hemodialysis compared with the general population, people with non-dialysis-dependent chronic kidney disease (NDD-CKD), people receiving peritoneal dialysis, or people with nondialyzed chronic kidney failure. SELECTION CRITERIA FOR STUDIES Randomized controlled trials, cohort or cross-sectional studies without language restriction. INDEX TESTS Validated neuropsychological tests of cognition. OUTCOMES Cognitive test scores, aggregated by cognitive domain: orientation and attention, perception, memory, language, construction and motor performance, concept formation and reasoning, and executive functions. RESULTS 42 studies of 3,522 participants. Studies were of high or uncertain risk of bias, assessed by the Newcastle-Ottawa Scale. People treated with hemodialysis had worse cognition than the general population, particularly in attention (n=22; standardized mean difference [SMD], -0.93; 95% CI, -1.18 to -0.68). Hemodialysis patients performed better than nondialyzed patients with chronic kidney failure in attention (n=6; SMD, 0.70; 95% CI, 0.45 to 0.96) and memory (n=6; SMD, 0.36; 95% CI, 0.08 to 0.63), but had poorer memory than the general population (n=16; SMD, -0.41; 95% CI, -0.91 to 0.09) and people with NDD-CKD (n=5; SMD, -0.40; 95% CI, -0.60 to -0.21). There were insufficient data to show other differences among people receiving hemodialysis and those receiving peritoneal dialysis or with NDD-CKD. LIMITATIONS Potentially biased studies, not wholly adjusted for education. High heterogeneity, mainly due to the large variety of tests used to assess cognition. CONCLUSIONS People treated with hemodialysis have impaired cognitive function compared to the general population, particularly in the domains of orientation and attention and executive function. Cognitive deficits in specific domains should be further explored in this population and should be considered when approaching education and chronic disease management.
Collapse
Affiliation(s)
- Emma O'Lone
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia; Centre for Kidney Research, The Children's Hospital at Westmead, Sydney, Australia.
| | - Michael Connors
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia; Dementia Collaborative Research Centre, School of Psychiatry, University of New South Wales, Sydney, Australia; ARC Centre of Excellence in Cognition and Its Disorders, Sydney, Australia; Department of Cognitive Science, Macquarie University, Sydney, Australia
| | - Philip Masson
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia; Centre for Kidney Research, The Children's Hospital at Westmead, Sydney, Australia; University of Edinburgh, Edinburgh, United Kingdom
| | - Sunny Wu
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia
| | - Patrick J Kelly
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia
| | | | | | | | - Giovanni F M Strippoli
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia; University of Bari, Bari, Italy; Diaverum Academy, Lund, Sweden
| | | | - Jonathan C Craig
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia; Centre for Kidney Research, The Children's Hospital at Westmead, Sydney, Australia
| | - Angela C Webster
- Sydney School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia; Centre for Kidney Research, The Children's Hospital at Westmead, Sydney, Australia; Centre for Transplant and Renal Research, Westmead Millennium Institute, University of Sydney at Westmead, Sydney, Australia
| |
Collapse
|
6
|
Jones DJW, Butler LT, Harris JP, Vaux EC. Latent learning in End Stage Renal Disease (ESRD). Physiol Behav 2015; 142:42-7. [PMID: 25637651 DOI: 10.1016/j.physbeh.2015.01.033] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Revised: 01/14/2015] [Accepted: 01/27/2015] [Indexed: 11/29/2022]
Abstract
Cognitive functions such as attention and memory are known to be impaired in End Stage Renal Disease (ESRD), but the sites of the neural changes underlying these impairments are uncertain. Patients and controls took part in a latent learning task, which had previously shown a dissociation between patients with Parkinson's disease and those with medial temporal damage. ESRD patients (n=24) and age and education-matched controls (n=24) were randomly assigned to either an exposed or unexposed condition. In Phase 1 of the task, participants learned that a cue (word) on the back of a schematic head predicted that the subsequently seen face would be smiling. For the exposed (but not unexposed) condition, an additional (irrelevant) colour cue was shown during presentation. In Phase 2, a different association, between colour and facial expression, was learned. Instructions were the same for each phase: participants had to predict whether the subsequently viewed face was going to be happy or sad. No difference in error rate between the groups was found in Phase 1, suggesting that patients and controls learned at a similar rate. However, in Phase 2, a significant interaction was found between group and condition, with exposed controls performing significantly worse than unexposed (therefore demonstrating learned irrelevance). In contrast, exposed patients made a similar number of errors to unexposed in Phase 2. The pattern of results in ESRD was different from that previously found in Parkinson's disease, suggesting a different neural origin.
Collapse
Affiliation(s)
- Daniel J W Jones
- School of Psychology and Clinical Language Sciences, University of Reading, Earley Gate, Whiteknights, Reading, Berkshire RG6 6AL, UK.
| | - Laurie T Butler
- School of Psychology and Clinical Language Sciences, University of Reading, Earley Gate, Whiteknights, Reading, Berkshire RG6 6AL, UK
| | - John P Harris
- School of Psychology and Clinical Language Sciences, University of Reading, Earley Gate, Whiteknights, Reading, Berkshire RG6 6AL, UK
| | - Emma C Vaux
- Department of Renal Medicine, Royal Berkshire NHS Foundation Trust, London Road, Reading RG1 5AN, UK
| |
Collapse
|
7
|
Abstract
Successful kidney transplantation was recently shown to lead to improvement in the cognitive performance of patients on chronic dialysis. To examine whether the early cognitive benefits of transplantation continue to develop over time, along with the patients' ongoing recovery, we addressed these questions in a prospective controlled study of 27 dialyzed patients who subsequently received a kidney transplant, 18 dialyzed patients awaiting kidney transplant, and 30 matched controls without kidney disease. Overall, successful kidney transplant contributed to a statistically significant improvement in performance on tests of motor/psychomotor speed, visual planning, memory, and abstract reasoning tested 1 year later. We also studied whether the cognitive performance of patients maintained on dialysis is stable or declines over time and found that it actually declined over this time even in adequately dialyzed patients. Measures of memory functions were particularly affected. This study indicates that the early beneficial effects of transplantation are not transient and were still evident 1 year following transplantation.
Collapse
|