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Maher P. The flavonoid fisetin reduces multiple physiological risk factors for dementia. Neurochem Int 2024; 178:105805. [PMID: 39004102 DOI: 10.1016/j.neuint.2024.105805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2024] [Revised: 07/05/2024] [Accepted: 07/11/2024] [Indexed: 07/16/2024]
Abstract
Dementia is a growing problem around the globe as the world's population continues to age. Multiple studies have identified potentially modifiable risk factors for the development of dementia suggesting that addressing some or all of these risk factors might have a significant impact on the aging population worldwide. However, this is not always as straightforward as it seems since many of these risk factors are currently treated with drugs specific to the risk factor. Moreover, since people can have multiple risk factors, addressing each of them individually could be highly problematic as it would likely lead to negative outcomes associated with polypharmacy and, in the long term, could do significant harm. A potential alternative is to identify compounds that have shown efficacy against a number of these different risk factors. As discussed in this review, there is strong evidence that the flavonol fisetin is one such compound. In animal studies it has shown efficacy against many of the risk factors that have been associated with an increased risk of developing dementia and also exhibits direct neuroprotective effects. Thus, further human research on fisetin in the context of dementia risk factors is clearly warranted.
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Affiliation(s)
- Pamela Maher
- Salk Institute for Biological Studies, La Jolla, CA, 92037, USA.
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2
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An X, Cui Y, Qin M, Zhou J, Liu Q, Ye H. The mediating role of nutritional indicators in the association between estimated glomerular filtration rate and cognitive impairment in older adults. Psychogeriatrics 2024. [PMID: 39149813 DOI: 10.1111/psyg.13176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Revised: 07/09/2024] [Accepted: 07/28/2024] [Indexed: 08/17/2024]
Abstract
BACKGROUND Cognitive impairment (CI) is common in older adults, especially those with renal dysfunction. We aimed to investigate the complex relationships among renal function, nutritional status, and CI in older people free from late chronic kidney disease (CKD) and severe CI. METHODS A study of older people (≥60 years old) with an estimated glomerular filtration rate (eGFR) of >30 mL/min/1.73 m2 and Montreal Cognitive Assessment (MoCA) scores of >10 (n = 237) was conducted at Beijing Tongren Hospital. Their eGFR was determined using the CKD-EPI-cr-Cysc equation. Cognitive function was evaluated with the MoCA. We tested the relationship between eGFR and MoCA scores using Spearman correlation analysis and multivariate logistic regression analysis. We then conducted a mediation analysis to figure out the mediating roles of nutritional indicators (Mini Nutritional Assessment-Short Form (MNA-SF) scores, albumin (ALB), and haemoglobin (HGB)) between the eGFR and MoCA scores. RESULTS The incidence of CI was 48.5% (115/237) in older people. Spearman correlation analysis revealed that the better the kidney function, the better the cognitive function (R = 0.297, P < 0.001). Multivariate logistic regression analysis revealed that eGFR decrease per 15 mL/min/1.73 m2 (OR: 1.415, 95% confidence interval: 1.055-1.896, P = 0.020) was related to CI after adjusting for age and sex. However, the eGFR was not associated with cognitive decline after adjusting for nutritional indicators, behavioural risk factors, other biomarkers, and chronic conditions, suggesting that eGFR is not independently associated with CI. Mediation analysis revealed that the MNA-SF scores (a*b = 0.006 (0.0002-0.012)) and HGB (a*b = 0.008 (0.001-0.017)) were mediating factors between the eGFR and MoCA scores. CONCLUSIONS A decline in renal function can directly lead to CI and can also exacerbate cognitive deficits through intermediary factors such as MNA-SF scores and HGB. Therefore, correcting anaemia and improving nutritional status are significantly important for enhancing cognitive function in older patients, especially those with renal dysfunction.
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Affiliation(s)
- Xiuping An
- Department of Geriatrics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Yao Cui
- Department of Geriatrics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Mingzhao Qin
- Department of Geriatrics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Jian Zhou
- Department of Geriatrics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Qian Liu
- Department of Geriatrics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Hui Ye
- Department of Geriatrics, Beijing Tongren Hospital, Capital Medical University, Beijing, China
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3
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Chan FHF, Sim P, Lim PXH, Khan BA, Choo JCJ, Griva K. Exploring the Cognitive Profiles of Haemodialysis Patients using Objective and Subjective Indicators: A Cross-sectional Observational Study. Int J Behav Med 2024:10.1007/s12529-024-10301-6. [PMID: 38918280 DOI: 10.1007/s12529-024-10301-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2024] [Indexed: 06/27/2024]
Abstract
BACKGROUND Cognitive impairment is common in haemodialysis patients and associated with adverse health outcomes. Previous work focused primarily on neuropsychological tests, the gold standard measure of cognition. However, these tests reflect performance under optimal conditions rather than performance in everyday life. This study aims to assess both objective and subjective cognition in haemodialysis patients. METHODS Adult haemodialysis patients completed measures of objective cognitive impairment (Montreal Cognitive Assessment), subjective cognitive complaints, mood and fatigue symptoms, and provided sociodemographic information. Clinical data such as comorbidity were extracted from patients' medical record. RESULTS A total of 268 haemodialysis patients (mean age = 59.87 years; 42.5% female) participated. Only 25.0% of the sample had normal cognition, while the rest had either objective cognitive impairments or clinically significant cognitive complaints, or both (both objective impairments and subjective complaints: 26.1%; objective impairments without complaint: 38.4%; significant complaints without objective impairments: 10.4%). Lower education was associated with the presence of objective cognitive impairments, whereas depression was associated with the presence of clinically significant cognitive complaints. Patients who exhibited both objective cognitive impairments and significant cognitive complaints were more likely to have diabetes and higher dialysis dose (Kt/V). Patients with objective cognitive impairments but no significant complaints were significantly older. CONCLUSIONS The cognitive burden of haemodialysis patients can be manifested as objective impairments and/or subjective complaints. When combined the two indicators may better represent the overall cognitive well-being in this population. There is a need to screen for cognitive difficulties and develop cognitive rehabilitative strategies in dialysis settings.
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Affiliation(s)
- Frederick H F Chan
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Pearl Sim
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Phoebe X H Lim
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore
| | - Behram A Khan
- Renal Health Services, Singapore, Singapore
- National University Health System, Singapore, Singapore
- Duke-NUS Medical School, Singapore, Singapore
| | - Jason C J Choo
- National Kidney Foundation, Singapore, Singapore
- Department of Renal Medicine, Singapore General Hospital, Singapore, Singapore
| | - Konstadina Griva
- Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore, Singapore.
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Chin K, Jiang H, Steinberg BE, Goldenberg NM, Desjardins JF, Kabir G, Liu E, Vanama R, Baker AJ, Deschamps A, Simpson JA, Maynes JT, Vinogradov SA, Connelly KA, Mazer CD, Hare GMT. Bilateral nephrectomy impairs cardiovascular function and cerebral perfusion in a rat model of acute hemodilutional anemia. J Appl Physiol (1985) 2024; 136:1245-1259. [PMID: 38385183 DOI: 10.1152/japplphysiol.00858.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/30/2024] [Accepted: 02/15/2024] [Indexed: 02/23/2024] Open
Abstract
Anemia and renal failure are independent risk factors for perioperative stroke, prompting us to assess the combined impact of acute hemodilutional anemia and bilateral nephrectomy (2Nx) on microvascular brain Po2 (PBro2) in a rat model. Changes in PBro2 (phosphorescence quenching) and cardiac output (CO, echocardiography) were measured in different groups of anesthetized Sprague-Dawley rats (1.5% isoflurane, n = 5-8/group) randomized to Sham 2Nx or 2Nx and subsequently exposed to acute hemodilutional anemia (50% estimated blood volume exchange with 6% hydroxyethyl starch) or time-based controls (no hemodilution). Outcomes were assessed by ANOVA with significance assigned at P < 0.05. At baseline, 2Nx rats demonstrated reduced CO (49.9 ± 9.4 vs. 66.3 ± 19.3 mL/min; P = 0.014) and PBro2 (21.1 ± 2.9 vs. 32.4 ± 3.1 mmHg; P < 0.001) relative to Sham 2Nx rats. Following hemodilution, 2Nx rats demonstrated a further decrease in PBro2 (15.0 ± 6.3 mmHg, P = 0.022). Hemodiluted 2Nx rats did not demonstrate a comparable increase in CO after hemodilution compared with Sham 2Nx (74.8 ± 22.4 vs. 108.9 ± 18.8 mL/min, P = 0.003) that likely contributed to the observed reduction in PBro2. This impaired CO response was associated with reduced fractional shortening (33 ± 9 vs. 51 ± 5%) and increased left ventricular end-systolic volume (156 ± 51 vs. 72 ± 15 µL, P < 0.001) suggestive of systolic dysfunction. By contrast, hemodiluted Sham 2Nx animals demonstrated a robust increase in CO and preserved PBro2. These data support the hypothesis that the kidney plays a central role in maintaining cerebral perfusion and initiating the adaptive increase in CO required to optimize PBro2 during acute anemia.NEW & NOTEWORTHY This study has demonstrated that bilateral nephrectomy acutely impaired cardiac output (CO) and microvascular brain Po2 (PBro2), at baseline. Following acute hemodilution, nephrectomy prevented the adaptive increase in CO associated with acute hemodilution leading to a further reduction in PBro2, accentuating the degree of cerebral tissue hypoxia. These data support a role for the kidney in maintaining PBro2 and initiating the increase in CO that optimized brain perfusion during acute anemia.
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Affiliation(s)
- Kyle Chin
- Department of Anesthesiology and Pain Medicine, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Helen Jiang
- Department of Anesthesiology and Pain Medicine, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
| | - Benjamin E Steinberg
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, The University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Neil M Goldenberg
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, The University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Jean-Francois Desjardins
- Keenan Research Centre for Biomedical Science in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
- Division of Cardiology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Golam Kabir
- Keenan Research Centre for Biomedical Science in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
- Division of Cardiology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Elaine Liu
- Department of Anesthesiology and Pain Medicine, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
- Keenan Research Centre for Biomedical Science in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
| | - Ramesh Vanama
- Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, The University of Toronto, Toronto, Ontario, Canada
| | - Andrew J Baker
- Department of Anesthesiology and Pain Medicine, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
- Keenan Research Centre for Biomedical Science in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
- Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
| | - Alain Deschamps
- Institut de Cardiologie de Montréal, Université de Montréal, Montreal Quebec, Canada
| | - Jeremy A Simpson
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
- IMPART investigator team Canada (https://impart.team/), Saint John, New Brunswick, Canada
| | - Jason T Maynes
- Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, The University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
- Program in Molecular Medicine, Hospital for Sick Children's Research Institute, Toronto, Ontario, Canada
| | - Sergei A Vinogradov
- Department of Biochemistry and Biophysics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, United States
| | - Kim A Connelly
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Division of Cardiology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - C David Mazer
- Department of Anesthesiology and Pain Medicine, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
- Institute of Medical Science, University of Toronto, Toronto, Ontario, Canada
- Department of Pharmacology and Toxicology, University of Toronto, Toronto, Ontario, Canada
| | - Gregory M T Hare
- Department of Anesthesiology and Pain Medicine, St Michael's Hospital, University of Toronto, Toronto, Ontario, Canada
- Department of Physiology, University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
- Keenan Research Centre for Biomedical Science in the Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, Ontario, Canada
- IMPART investigator team Canada (https://impart.team/), Saint John, New Brunswick, Canada
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Farisco M, Blumblyte IA, Franssen C, Nitsch D, Zecchino I, Capasso G, Hafez G. Cognitive decline related to chronic kidney disease as an exclusion factor from kidney transplantation: results from an international survey. Clin Kidney J 2024; 17:sfae114. [PMID: 38745874 PMCID: PMC11092267 DOI: 10.1093/ckj/sfae114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Indexed: 05/16/2024] Open
Abstract
Background and hypothesis There seems to be a lack of consensus on the necessity and the modality of psychological and specifically cognitive assessment of candidates for kidney transplantation. Both points are often delegated to individual hospitals/centres, whereas international guidelines are inconsistent. We think it is essential to investigate professionals' opinions to advance towards a consistent clinical practice. Methods This paper presents the results of an international survey among clinical professionals, mainly nephrologists from the CONNECT (Cognitive decline in Nephro-Neurology: European Cooperative Target) network and beyond (i.e. from personal contacts of CONNECT members). The survey investigated their opinions about the question of whether cognitive decline in patients with chronic kidney disease may affect their eligibility for kidney transplantation. Results Our results show that most clinicians working with patients affected by chronic kidney disease think that cognitive decline may challenge their eligibility for transplantation despite data that suggest that, in some patients, cognitive problems improve after kidney transplantation. Conclusion We conclude that three needs emerge as particularly pressing: defining agreed-on standards for a multifaceted and multifactorial assessment (i.e. including both clinical/medical and psychosocial factors) of candidates with chronic kidney disease to kidney transplantation; further investigating empirically the causal connection between chronic kidney disease and cognition; and further investigating empirically the possible partial reversibility of cognitive decline after kidney transplantation.
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Affiliation(s)
- Michele Farisco
- Department of Public Health and Caring Sciences, Centre for Research Ethics and Bioethics, Uppsala University, Uppsala, Sweden
- Biogem Molecular Biology and Genetics Research Institute, Ariano Irpino (AV), Italy
| | - Inga A Blumblyte
- Department of Nephrology, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Casper Franssen
- Department of Nephrology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Dorothea Nitsch
- UK Renal Registry, UK Kidney Association, Bristol, UK
- Department of Non-communicable Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK
- Department of Nephrology, Royal Free London NHS Foundation Trust, London, UK
| | - Irene Zecchino
- Department of Science and Technology, University of Sannio, Benevento, Italy
| | - Giovambattista Capasso
- Department of Public Health and Caring Sciences, Centre for Research Ethics and Bioethics, Uppsala University, Uppsala, Sweden
- Department Translational Medical Science, University Campania Luigi Vanvitelli, Naples, Italy
| | - Gaye Hafez
- Department of Pharmacology, Faculty of Pharmacy, Altinbas University, Istanbul, Turkey
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Hajjar I, Neal R, Yang Z, Lah JJ. Alzheimer's disease cerebrospinal fluid biomarkers and kidney function in normal and cognitively impaired older adults. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2024; 16:e12581. [PMID: 38617186 PMCID: PMC11010257 DOI: 10.1002/dad2.12581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 03/05/2024] [Accepted: 03/10/2024] [Indexed: 04/16/2024]
Abstract
INTRODUCTION Recent Alzheimer's disease (AD) clinical trials have used cerebrospinal fluid (CSF) biomarker levels for screening and enrollment. Preliminary evidence suggests that AD risk is related to impaired renal function. The impact of kidney function on commonly used AD biomarkers remains unknown. METHODS Participants in studies conducted at the Goizueta Alzheimer's Disease Research Center (N = 973) had measurements of serum creatinine and CSF AD biomarkers. General linear models and individual data were used to assess the relationships between biomarkers and eGFR. RESULTS Lower estimated glomerular filtration rate (eGFR) was associated with lower amyloid beta (Aβ)42/tau ratio (p < 0.0001) and Aβ42 (p = 0.002) and higher tau (p < 0.0001) and p-tau (p = 0.0002). The impact of eGFR on AD biomarker levels was more robust in individuals with cognitive impairment (all p-values were < 0.005). DISCUSSION The association between eGFR and CSF AD biomarkers has a significant impact that varies by cognitive status. Future studies exploring this impact on the pathogenesis of AD and related biomarkers are needed. Highlights There is a significant association between Alzheimer's disease (AD) cerebrospinal fluid (CSF) biomarkers and both estimated glomerular filtration rate (eGFR) and mild cognitive impairment (MCI).Kidney function influences CSF biomarker levels in individuals with normal cognitive function and those with MCI.The impact of kidney function on AD biomarker levels is more pronounced in individuals with cognitive impairment.The variation in CSF tau levels is independent of cardiovascular factors and is likely directly related to kidney function.Tau may have a possible role in both kidney and cognitive function.
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Affiliation(s)
- Ihab Hajjar
- Department of NeurologyUniversity of Texas Southwestern Medical CenterDallasTexasUSA
- Department of NeurologyEmory University School of MedicineAtlantaGeorgiaUSA
- Department of MedicineEmory University School of MedicineAtlantaGeorgiaUSA
| | - Reem Neal
- Department of NeurologyUniversity of Texas Southwestern Medical CenterDallasTexasUSA
| | - Zhiyi Yang
- Department of NeurologyEmory University School of MedicineAtlantaGeorgiaUSA
| | - James J. Lah
- Department of NeurologyEmory University School of MedicineAtlantaGeorgiaUSA
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Li H, Khang TF. clrDV: a differential variability test for RNA-Seq data based on the skew-normal distribution. PeerJ 2023; 11:e16126. [PMID: 37790621 PMCID: PMC10544356 DOI: 10.7717/peerj.16126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Accepted: 08/27/2023] [Indexed: 10/05/2023] Open
Abstract
Background Pathological conditions may result in certain genes having expression variance that differs markedly from that of the control. Finding such genes from gene expression data can provide invaluable candidates for therapeutic intervention. Under the dominant paradigm for modeling RNA-Seq gene counts using the negative binomial model, tests of differential variability are challenging to develop, owing to dependence of the variance on the mean. Methods Here, we describe clrDV, a statistical method for detecting genes that show differential variability between two populations. We present the skew-normal distribution for modeling gene-wise null distribution of centered log-ratio transformation of compositional RNA-seq data. Results Simulation results show that clrDV has false discovery rate and probability of Type II error that are on par with or superior to existing methodologies. In addition, its run time is faster than its closest competitors, and remains relatively constant for increasing sample size per group. Analysis of a large neurodegenerative disease RNA-Seq dataset using clrDV successfully recovers multiple gene candidates that have been reported to be associated with Alzheimer's disease.
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Affiliation(s)
- Hongxiang Li
- Institute of Mathematical Sciences, Universiti Malaya, Kuala Lumpur, Malaysia
| | - Tsung Fei Khang
- Institute of Mathematical Sciences, Universiti Malaya, Kuala Lumpur, Malaysia
- Universiti Malaya Centre for Data Analytics, Universiti Malaya, Kuala Lumpur, Malaysia
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Sun HL, Yao XQ, Lei L, Jin WS, Bai YD, Zeng GH, Shi AY, Liang J, Zhu L, Liu YH, Wang YJ, Bu XL. Associations of Blood and Cerebrospinal Fluid Aβ and tau Levels with Renal Function. Mol Neurobiol 2023; 60:5343-5351. [PMID: 37310581 DOI: 10.1007/s12035-023-03420-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 05/25/2023] [Indexed: 06/14/2023]
Abstract
Amyloid β (Aβ) and tau play pivotal roles in the pathogenesis of Alzheimer's disease (AD). Previous studies have shown that brain-derived Aβ and tau can be cleared through transport into the periphery, and the kidneys may be vital organs involved in the clearance of Aβ and tau. However, the effects of deficiency in the clearance of Aβ and tau by the kidneys on brain AD-type pathologies in humans remain largely unknown. In this study, we first recruited 41 patients with chronic kidney disease (CKD) and 40 age- and sex-matched controls with normal renal function to analyze the associations of the estimated glomerular filtration rate (eGFR) with plasma Aβ and tau levels. To analyze the associations of eGFR with cerebrospinal fluid (CSF) AD biomarkers, we recruited 42 cognitively normal CKD patients and 150 cognitively normal controls with CSF samples. Compared with controls with normal renal function, CKD patients had higher plasma levels of Aβ40, Aβ42 and total tau (T-tau), lower CSF levels of Aβ40 and Aβ42 and higher levels of CSF T-tau/Aβ42 and phosphorylated tau (P-tau)/Aβ42. Plasma Aβ40, Aβ42, and T-tau levels were negatively correlated with eGFR. In addition, eGFR was negatively correlated with CSF levels of T-tau, T-tau/Aβ42, and P-tau/Aβ42 but positively correlated with Mini-Mental State Examination (MMSE) scores. Thus, this study showed that the decline in renal function was correlated with abnormal AD biomarkers and cognitive decline, which provides human evidence that renal function may be involved in the pathogenesis of AD.
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Affiliation(s)
- Hao-Lun Sun
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
- Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse, China
| | - Xiu-Qing Yao
- Department of Rehabilitation, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, China
| | - Li Lei
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China
| | - Wang-Sheng Jin
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China
| | - Yu-Di Bai
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China
| | - Gui-Hua Zeng
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China
| | - An-Yu Shi
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China
| | - Jun Liang
- Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse, China
| | - Li Zhu
- Shigatse Branch, Xinqiao Hospital, Third Military Medical University, Shigatse, China
| | - Yu-Hui Liu
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China
- Institute of Brain and Intelligence, Third Military Medical University, Chongqing, China
- State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing, China
| | - Yan-Jiang Wang
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China.
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China.
- Institute of Brain and Intelligence, Third Military Medical University, Chongqing, China.
- State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing, China.
- Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China.
| | - Xian-Le Bu
- Department of Neurology and Centre for Clinical Neuroscience, Daping Hospital, Third Military Medical University, Chongqing, China.
- Chongqing Key Laboratory of Ageing and Brain Diseases, Chongqing, China.
- Institute of Brain and Intelligence, Third Military Medical University, Chongqing, China.
- State Key Laboratory of Trauma, Burns and Combined Injury, Third Military Medical University, Chongqing, China.
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Yeh TS, Clifton L, Collister JA, Liu X, Hunter DJ, Littlejohns TJ. Kidney function, albuminuria, and their modification by genetic factors and risk of incident dementia in UK Biobank. Alzheimers Res Ther 2023; 15:138. [PMID: 37605228 PMCID: PMC10440913 DOI: 10.1186/s13195-023-01248-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Accepted: 05/23/2023] [Indexed: 08/23/2023]
Abstract
BACKGROUND Associations between kidney function and dementia risk are inconclusive. Chronic kidney disease (CKD) severity is determined by levels of both estimated glomerular filtration rate (eGFR) and the urine albumin to creatinine ratio (ACR). However, whether there is a graded increase in dementia risk for worse eGFR in each ACR category is unclear. Also, whether genetic risk for dementia impacts the associations is unknown. The current study aims to investigate the associations between eGFR and albuminuria with dementia risk both individually and jointly, whether the associations vary by different follow-up periods, and whether genetic factors modified the associations. METHODS In 202,702 participants aged ≥ 60 years from the UK Biobank, Cox proportional-hazards models were used to examine the associations between eGFR and urine albumin creatinine ratio (ACR) with risk of incident dementia. GFR was estimated based on serum creatinine, cystatin C, or both. The models were restricted to different follow-up periods (< 5 years, 5-10 years, and ≥ 10 years) to investigate potential reverse causation. RESULTS Over 15 years of follow-up, 6,042 participants developed dementia. Decreased kidney function (eGFR < 60 ml/min/1.73m2) was associated with an increased risk of dementia (Hazard Ratio [HR] = 1.42, 95% Confidence Interval [CI] 1.28-1.58), compared to normal kidney function (≥ 90 ml/min/1.73m2). The strength of the association remained consistent when the models were restricted to different periods of follow-up. The HRs for incident dementia were 1.16 (95% CI 1.07-1.26) and 2.24 (95% CI 1.79-2.80) for moderate (3-30 mg/mmol) and severely increased ACR (≥ 30 mg/mmol) compared to normal ACR (< 3 mg/mmol). Dose-response associations were observed when combining eGFR and ACR, with those in the severest eGFR and ACR group having the greatest risk of dementia (HR = 4.70, 95% CI 2.34-9.43). APOE status significantly modified the association (p = 0.04), with stronger associations observed among participants with a lower genetic risk of dementia. There was no evidence of an interaction between kidney function and non-APOE polygenic risk of dementia with dementia risk (p = 0.42). CONCLUSIONS Kidney dysfunction and albuminuria were individually and jointly associated with higher dementia risk. The associations were greater amongst participants with a lower genetic risk of dementia based on APOE, but not non-APOE polygenic risk.
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Affiliation(s)
- Tian-Shin Yeh
- Department of Physical Medicine and Rehabilitation, School of Medicine, College of Medicine, Taipei Medical University, No.250, Wuxing St., Taipei, 11031, Taiwan.
- Department of Physical Medicine and Rehabilitation, Wan Fang Hospital, Taipei Medical University, Taipei, Taiwan.
- Nuffield Department of Population Health, University of Oxford, Oxford, UK.
- Department of Epidemiology and Nutrition, Harvard T. H. Chan School of Public Health, Harvard University, Boston, MA, USA.
- Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan.
- Department of Physical Medicine and Rehabilitation, College of Medicine, National Taiwan University, Taipei, Taiwan.
| | - Lei Clifton
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | | | - Xiaonan Liu
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - David J Hunter
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
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10
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Kwon MJ, Song YR, Kim JH, Kim JH, Kang HS, Lim H, Kim MJ, Kim NY, Hong S, Choi Y, Min KW, Choi HG, Kim ES. Exploring the Link between Chronic Kidney Disease and Alzheimer's Disease: A Longitudinal Follow-Up Study Using the Korean National Health Screening Cohort. Biomedicines 2023; 11:1606. [PMID: 37371701 DOI: 10.3390/biomedicines11061606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/29/2023] Open
Abstract
Chronic kidney disease (CKD) and Alzheimer's disease (AD) are common chronic diseases in the elderly population. Although a relationship between CKD and the occurrence of AD has been proposed, previous research results have been disputed, and further investigation is necessary to confirm this relationship. In this longitudinal follow-up study, we examined data from the Korean National Health Insurance Service-Health Screening Cohort, consisting of 15,756 individuals with CKD and 63,024 matched controls aged ≥40 years who received health check-ups between 2002 and 2019. Overlap-weighted Cox proportional hazard regression models were exploited to calculate hazard ratios (HRs) for the association between CKD and AD. During the monitoring period, individuals with CKD had a greater incidence of AD than those without CKD (15.80 versus 12.40 per 1000 person years). After accounting for various factors, CKD was significantly associated with a 1.14-fold increased likelihood of developing AD, with a 95% confidence interval ranging from 1.08 to 1.20. In subgroup analysis, this relationship persisted irrespective of age (≥70 or <70), sex, income, smoking status, alcohol consumption, place of residence, or fasting blood glucose level. Additionally, the association between CKD and AD was still evident among patients who were overweight or obese, those with normal blood pressure or cholesterol levels, and those without any other health conditions or with a CCI score of ≥2. These results suggest that CKD could increase the probability of developing AD in the Korean adult population irrespective of demographic or lifestyle conditions. This may make it challenging to predict AD in patients with CKD, emphasizing the importance of frequent AD screening and management.
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Affiliation(s)
- Mi Jung Kwon
- Department of Pathology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
| | - Young Rim Song
- Division of Nephrology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
| | - Joo-Hee Kim
- Division of Pulmonary, Allergy, and Critical Care Medicine, Department of Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
| | - Ji Hee Kim
- Department of Neurosurgery, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
| | - Ho Suk Kang
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
| | - Hyun Lim
- Division of Gastroenterology, Department of Internal Medicine, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
| | - Min-Jeong Kim
- Department of Radiology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
| | - Nan Young Kim
- Hallym Institute of Translational Genomics and Bioinformatics, Hallym University Medical Center, Anyang 14068, Republic of Korea
| | - Sangkyoon Hong
- Hallym Institute of Translational Genomics and Bioinformatics, Hallym University Medical Center, Anyang 14068, Republic of Korea
| | - Younghee Choi
- Department of Pathology, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong 18450, Republic of Korea
- Research Institute for Complementary & Alternative Medicine, Hallym University, Chuncheon 24252, Republic of Korea
| | - Kyueng-Whan Min
- Department of Pathology, Uijeongbu Eulji Medical Center, Eulji University School of Medicine, Uijeongbu 11759, Republic of Korea
| | - Hyo Geun Choi
- Suseo Seoul E.N.T. Clinic and MD Analytics, Seoul 06349, Republic of Korea
| | - Eun Soo Kim
- Department of Radiology, Hallym University Sacred Heart Hospital, Hallym University College of Medicine, Anyang 14068, Republic of Korea
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11
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Ghoshal S. Renal and Electrolyte Disorders and the Nervous System. Continuum (Minneap Minn) 2023; 29:797-825. [PMID: 37341331 DOI: 10.1212/con.0000000000001286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
OBJECTIVE Neurologic complications are a major contributor to death and disability in patients with renal disease. Oxidative stress, endothelial dysfunction, accelerated arteriosclerosis, and uremic inflammatory milieu affect both the central and peripheral nervous systems. This article reviews the unique contributions of renal impairment to neurologic disorders and their common clinical manifestations as the prevalence of renal disease increases in a globally aging population. LATEST DEVELOPMENT Advances in the understanding of the pathophysiologic interplay between the kidneys and brain, also referred to as the kidney-brain axis, have led to more widespread recognition of associated changes in neurovascular dynamics, central nervous system acidification, and uremia-associated endothelial dysfunction and inflammation in the central and peripheral nervous systems. Acute kidney injury increases mortality in acute brain injury to nearly 5 times that seen in matched controls. Renal impairment and its associated increased risks of intracerebral hemorrhage and accelerated cognitive decline are developing fields. Dialysis-associated neurovascular injury is increasingly recognized in both continuous and intermittent forms of renal replacement therapy, and treatment strategies for its prevention are evolving. ESSENTIAL POINTS This article summarizes the effects of renal impairment on the central and peripheral nervous systems with special considerations in acute kidney injury, patients requiring dialysis, and conditions that affect both the renal and nervous systems.
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12
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Karami F, Jamaati H, Coleman-Fuller N, Zeini MS, Hayes AW, Gholami M, Salehirad M, Darabi M, Motaghinejad M. Is metformin neuroprotective against diabetes mellitus-induced neurodegeneration? An updated graphical review of molecular basis. Pharmacol Rep 2023; 75:511-543. [PMID: 37093496 DOI: 10.1007/s43440-023-00469-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 02/21/2023] [Accepted: 02/23/2023] [Indexed: 04/25/2023]
Abstract
Diabetes mellitus (DM) is a metabolic disease that activates several molecular pathways involved in neurodegenerative disorders. Metformin, an anti-hyperglycemic drug used for treating DM, has the potential to exert a significant neuroprotective role against the detrimental effects of DM. This review discusses recent clinical and laboratory studies investigating the neuroprotective properties of metformin against DM-induced neurodegeneration and the roles of various molecular pathways, including mitochondrial dysfunction, oxidative stress, inflammation, apoptosis, and its related cascades. A literature search was conducted from January 2000 to December 2022 using multiple databases including Web of Science, Wiley, Springer, PubMed, Elsevier Science Direct, Google Scholar, the Core Collection, Scopus, and the Cochrane Library to collect and evaluate peer-reviewed literature regarding the neuroprotective role of metformin against DM-induced neurodegenerative events. The literature search supports the conclusion that metformin is neuroprotective against DM-induced neuronal cell degeneration in both peripheral and central nervous systems, and this effect is likely mediated via modulation of oxidative stress, inflammation, and cell death pathways.
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Affiliation(s)
- Fatemeh Karami
- Chronic Respiratory Disease Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hamidreza Jamaati
- Chronic Respiratory Disease Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Natalie Coleman-Fuller
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, 55108, USA
| | - Maryam Shokrian Zeini
- Chronic Respiratory Disease Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - A Wallace Hayes
- University of South Florida College of Public Health and Institute for Integrative Toxicology, Michigan State University, East Lansing, USA
| | - Mina Gholami
- Chronic Respiratory Disease Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mahsa Salehirad
- Cognitive and Neuroscience Research Center (CNRC), Amir-Almomenin Hospital, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Mohammad Darabi
- Chronic Respiratory Disease Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Majid Motaghinejad
- Chronic Respiratory Disease Research Center (CRDRC), National Research Institute of Tuberculosis and Lung Diseases (NRITLD), Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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13
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Wang Y, Hu L, Zhou D, Chen X, Zhou L. Association of Urinary Biomarkers of Renal Tubular Injury with Cognitive Dysfunction in Older Patients with Chronic Kidney Disease: A Cross-Sectional Observational Study. Brain Sci 2023; 13:brainsci13040551. [PMID: 37190516 DOI: 10.3390/brainsci13040551] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/06/2023] [Accepted: 03/23/2023] [Indexed: 03/29/2023] Open
Abstract
Epidemiological data suggest that individuals in all stages of chronic kidney disease (CKD) have higher risks of developing cognitive impairment. The relationship between CKD and cognition has been assessed exclusively using glomerular function markers; however, kidney tubule injury has not been assessed. We assessed the association between urinary biomarkers of renal tubular injury and cognitive dysfunction in older patients with CKD Stages 3–4. According to the Montreal Cognitive Assessment, participants were divided into cognitive dysfunction and control groups. Compared with the control group, the cognitive dysfunction group had significantly higher percentages of smokers, noticeably lower average education, and higher mitochondrial DNA (mtDNA) levels in the peripheral blood. Spearman correlation analysis showed that higher urine neutrophil gelatinase-associated lipocalin, kidney injury molecule-1, and beta-2 microglobulin (β2M) levels were significantly associated with lower cognitive scores. Multivariate logistic regression analysis showed that only increased urinary β2M levels were independently associated with cognitive worsening in CKD after adjusting for confounders. Logistic regression identified a promising role of urinary β2M combined with smoking and education for predicting cognitive impairment in CKD. Urinary β2M and cognitive function negatively correlated with mtDNA content, suggesting that mitochondrial dysfunction is a common pathophysiological mechanism linking CKD and cognitive dysfunction.
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14
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Conroy AL, Datta D, Hoffmann A, Wassmer SC. The kidney-brain pathogenic axis in severe falciparum malaria. Trends Parasitol 2023; 39:191-199. [PMID: 36737313 PMCID: PMC11071448 DOI: 10.1016/j.pt.2023.01.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/13/2023] [Accepted: 01/13/2023] [Indexed: 02/05/2023]
Abstract
Severe falciparum malaria is a medical emergency and a leading cause of death and neurodisability in endemic areas. Common complications include acute kidney injury (AKI) and cerebral malaria, and recent studies have suggested links between kidney and brain dysfunction in Plasmodium falciparum infection. Here, we review these new findings and present the hypothesis of a pivotal pathogenic crosstalk between the kidneys and the brain in severe falciparum malaria. We highlight the evidence of a role for distant organ involvement in the development of cerebral malaria and subsequent neurocognitive impairment post-recovery, describe the challenges associated with current diagnostic shortcomings for both AKI and brain involvement in severe falciparum malaria, and explore novel potential therapeutic strategies.
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Affiliation(s)
- Andrea L Conroy
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Dibyadyuti Datta
- Department of Pediatrics, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Angelika Hoffmann
- University Institute of Diagnostic and Interventional Neuroradiology, University Hospital Bern, University of Bern, Bern, Switzerland
| | - Samuel C Wassmer
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK.
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15
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Soysal P, Heybeli C, Koc Okudur S, Caliskan Bozyel E, Smith L, Kazancioglu R. Prevalence and co-incidence of geriatric syndromes according to glomerular filtration rate in older patients. Int Urol Nephrol 2023; 55:469-476. [PMID: 36030356 DOI: 10.1007/s11255-022-03356-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 08/21/2022] [Indexed: 01/25/2023]
Abstract
BACKGROUND Geriatric syndromes are complex clinical manifestations and significant causes of mortality and morbidity. This study was aimed to determine the frequency and co-incidence of geriatric syndromes in older patients with chronic kidney disease (CKD). METHODS Older patients were included in this cross-sectional retrospective study. All patients were questioned in terms of geriatric syndromes including dementia, polypharmacy, malnutrition, frailty, probable sarcopenia, urinary incontinence, falls, fear of falling, depression, insomnia, and excessive daytime sleepiness. Geriatric syndromes were evaluated according to Glomerular Filtration Rate (GFR) ≥ 60 ml/min/1.73 m2, 30-59 ml/min/1.73 m2 and < 30 ml/min/1.73 m2. RESULTS Of the 1320 patients included, the mean age was 79.6 ± 7.8 and 929 (70%) were female. GFR groups ≥ 60 ml/min/1.73 m2, 30-59 ml/min/1.73 m2, and < 30 ml/min/1.73 m2 comprised of 55%, 38%, and 7% patients, respectively. The rate of ≥ 3 syndromes in the same person was 66.4% in the group with GFR ≥ 60 ml/min/1.73 m2. After age and sex adjusted; it was observed that frailty was 2.5 times, probable sarcopenia 2.4 times, and malnutrition 2.7 times more in those with GFR 30-59 ml/min/1.73 m2 compared to those with GFR ≥ 60 ml/min/1.73 m2 (p < 0.05). Dementia 1.4, frailty 1.55, polypharmacy 2.0, and urinary incontinence were 1.6 times more common in those with a GFR < 30 ml/min/1.73 m2 (p < 0.05). CONCLUSIONS Each of the geriatric syndromes and their co-incidence are high in older CKD patients. Geriatricians and nephrologists should be aware of geriatric syndromes in older CKD patients, and they should cooperate for the management of these patients.
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Affiliation(s)
- Pinar Soysal
- Division of Geriatric Medicine, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey.
| | - Cihan Heybeli
- Division of Nephrology, Muş State Hospital, Muş, Turkey
| | - Saadet Koc Okudur
- Division of Geriatric Medicine, Manisa State Hospital, Manisa, Turkey
| | - Emel Caliskan Bozyel
- Division of Geriatric Medicine, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
| | - Lee Smith
- Centre for Health Performance and Wellbeing, Anglia Ruskin University, Cambridge, UK
| | - Rumeyza Kazancioglu
- Division of Nephrology, Faculty of Medicine, Bezmialem Vakif University, Istanbul, Turkey
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16
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Stocker H, Beyer L, Trares K, Perna L, Rujescu D, Holleczek B, Beyreuther K, Gerwert K, Schöttker B, Brenner H. Association of Kidney Function With Development of Alzheimer Disease and Other Dementias and Dementia-Related Blood Biomarkers. JAMA Netw Open 2023; 6:e2252387. [PMID: 36692879 PMCID: PMC10408272 DOI: 10.1001/jamanetworkopen.2022.52387] [Citation(s) in RCA: 22] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 12/02/2022] [Indexed: 01/25/2023] Open
Abstract
IMPORTANCE Previous research has suggested an association of kidney function with risk of Alzheimer disease (AD) or other dementias and dementia-related blood biomarkers, but a distinct association remains unclear. OBJECTIVE To evaluate the association of kidney function with risk of diagnosis of incident AD or dementia within 17 years and with the blood biomarkers neurofilament light (NfL), phosphorylated tau181 (p-tau181), and glial fibrillary acidic protein (GFAP). DESIGN, SETTING, AND PARTICIPANTS In this prospective, population-based cohort study and nested case-control study, 9940 participants in Germany were enrolled between 2000 and 2002 by their general practitioners and followed up for up to 17 years. Participants were included if information on dementia status and creatinine/cystatin C measurements were available. A subsample of participants additionally had measurements of NfL, p-tau181, and GFAP obtained from blood samples. Statistical analysis was performed from January 3 to November 25, 2022. EXPOSURES Impaired kidney function, based on estimated glomerular filtration rate less than 60 mL/min/1.73 m2 according to the 2021 Chronic Kidney Disease Epidemiology Collaboration creatinine-cystatin C equation. MAIN OUTCOMES AND MEASURES All-cause dementia, AD, and vascular dementia diagnosis, as well as log-transformed levels of NfL, p-tau181, and GFAP in blood. RESULTS Of 6256 participants (3402 women [54.4%]; mean [SD] age at baseline, 61.7 [6.6] years), 510 received an all-cause dementia diagnosis within 17 years of baseline. The dementia-related blood biomarker nested case-control sample included 766 participants. After adjusting for age and sex, impaired kidney function at baseline was not associated with a higher risk of all-cause dementia (hazard ratio [HR], 0.95; 95% CI, 0.69-1.29), AD (HR, 0.94; 95% CI, 0.55-1.63), or vascular dementia diagnosis (HR, 1.06; 95% CI, 0.65-1.70) within 17 years. In the cross-sectional analysis, after adjusting for age and sex, impaired kidney function was significantly associated with NfL and p-tau181 levels in blood (NfL: β = 0.47 and P < .001; p-tau181: β = 0.21 and P = .003). After adjusting for age and sex, significant associations with GFAP levels were evident only among men (men: β = 0.31 and P = .006; women: β = -0.12 and P = .11). CONCLUSIONS AND RELEVANCE In this population-based study of community-dwelling adults, reduced kidney function was associated with increased levels of dementia-related blood biomarkers but not increased dementia risk. Kidney function might influence the accuracy of dementia-related blood biomarkers and should be considered in clinical translation.
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Affiliation(s)
- Hannah Stocker
- Network Aging Research, Heidelberg University, Heidelberg, Germany
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
- Population Health Sciences, German Center for Neurodegenerative Diseases, Bonn, Germany
| | - Léon Beyer
- Center for Protein Diagnostics (ProDi), Ruhr-University Bochum, Bochum, Germany
- Faculty of Biology and Biotechnology, Department of Biophysics, Ruhr-University Bochum, Bochum, Germany
| | - Kira Trares
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - Laura Perna
- Department of Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Munich, Germany
| | - Dan Rujescu
- Department of Psychiatry, University of Vienna, Vienna, Austria
| | | | | | - Klaus Gerwert
- Center for Protein Diagnostics (ProDi), Ruhr-University Bochum, Bochum, Germany
- Faculty of Biology and Biotechnology, Department of Biophysics, Ruhr-University Bochum, Bochum, Germany
| | - Ben Schöttker
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
| | - Hermann Brenner
- Network Aging Research, Heidelberg University, Heidelberg, Germany
- Division of Clinical Epidemiology and Aging Research, German Cancer Research Center, Heidelberg, Germany
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Merchant RA, Vathsala A. Healthy aging and chronic kidney disease. Kidney Res Clin Pract 2022; 41:644-656. [PMID: 36328991 PMCID: PMC9731776 DOI: 10.23876/j.krcp.22.112] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 06/18/2022] [Accepted: 07/03/2022] [Indexed: 07/30/2023] Open
Abstract
The world population is aging and the prevalence of noncommunicable diseases such as diabetes, hypertension, and chronic kidney disease (CKD) will increase significantly. With advances in medical treatment and public health, the human lifespan continues to outpace the health span in such a way that the last decade of life is generally spent in poor health. In 2015, the World Health Organization defined healthy aging as 'the process of developing and maintaining the functional ability that enables wellbeing in older age.' CKD is increasingly being recognized as a model of accelerated aging and is associated with physical performance decline, cognitive decline, falls and fractures, poor quality of life, loss of appetite, and inflammation. Frailty and dementia are the final pathways and key determinants of disability and mortality independent of underlying disease. CKD, dementia, and frailty share a triangular relationship with synergistic actions and have common risk factors wherein CKD accelerates frailty and dementia through mechanisms such as uremic toxicity, metabolic acidosis and derangements, anorexia and malnutrition, dialysis-related hemodynamic instability, and sleep disturbance. Frailty accelerates glomerular filtration decline as well as dialysis induction in CKD and more than doubles the mortality risk. Anorexia is one of the major causes of protein-energy malnutrition, which is also prevalent in the aging population and warrants screening. Healthcare systems across the world need to have a system in place for the prevention of CKD amongst high-risk older adults, focusing on screening for poor prognostic factors amongst patients with CKD such as frailty, poor appetite, and cognitive impairment and providing necessary person-centered interventions to reverse underlying factors that may contribute to poor outcomes.
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Affiliation(s)
- Reshma Aziz Merchant
- Division of Geriatric Medicine, Department of Medicine, National University Hospital, Singapore, Singapore
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Anantharaman Vathsala
- Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Division of Nephrology, Department of Medicine, National University Hospital, Singapore, Singapore
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