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Uric acid AND cognition

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https://www.readbyqxmd.com/read/29180691/serum-uric-acid-is-independently-associated-with-enlarged-perivascular-spaces
#1
Shuna Yang, Xiaoyu Zhang, Junliang Yuan, Jiangmei Yin, Wenli Hu
Enlarged perivascular spaces (EPVS) are reported to be associated with impaired cognitive function and sleep disorders. It is of clinical importance to understand the risk factors for EPVS. Hyperuricemia increases the risk of hypertension and endothelial dysfunction, which are well recognized to be associated with EPVS. Therefore, we postulated that serum uric acid (SUA) might be associated with EPVS. A total of 665 lacunar stroke patients were enrolled in this study. The SUA concentrations of patients with severe EPVS were much higher than those of patients with mild EPVS (for basal ganglia: 5...
November 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28986252/uric-acid-demonstrates-neuroprotective-effect-on-parkinson-s-disease-mice-through-nrf2-are-signaling-pathway
#2
Ting-Ting Huang, Dong-Lin Hao, Bo-Na Wu, Lun-Lin Mao, Jin Zhang
Uric acid has neuroprotective effect on Parkinson's disease (PD) by inhibiting oxidative damage and neuronal cell death. Our previous study has shown that uric acid protected dopaminergic cell line damage through inhibiting accumulation of NF-E2-related factor 2 (Nrf2). This study aimed to investigate its in vivo neuroprotective effect. PD was induced by MPTP intraperitoneally injection for 7 d in male C57BL/6 mice. Mice were treated with either uric acid (intraperitoneally injection 250 mg/kg) or saline for a total of 13 d...
December 2, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28979123/low-uric-acid-is-a-risk-factor-in-mild-cognitive-impairment
#3
LingLing Xue, YongBing Liu, HuiPing Xue, Jin Xue, KaiXuan Sun, LinFeng Wu, Ping Hou
BACKGROUND: Mild cognitive impairment (MCI) represents a transitional stage between normal aging and dementia. Uric acid is a water-soluble antioxidant found in the body. Many recent studies have found that uric acid plays an important role in cognitive impairment, although the effects of uric acid on MCI are not clear. OBJECTIVE: The objective of this study was to explore the relationship between uric acid and MCI. METHODS: Using a random sampling method, this study investigated 58 patients with MCI and 57 healthy elderly from January 2016 to November 2016...
2017: Neuropsychiatric Disease and Treatment
https://www.readbyqxmd.com/read/28953682/potential-contribution-of-the-neurodegenerative-disorders-risk-loci-to-cognitive-performance-in-an-elderly-male-gout-population
#4
Lin Han, Zhaotong Jia, Chunwei Cao, Zhen Liu, Fuqiang Liu, Lin Wang, Wei Ren, Mingxia Sun, Baoping Wang, Changgui Li, Li Chen
Cognitive impairment has been described in elderly subjects with high normal concentrations of serum uric acid. However, it remains unclear if gout confers an increased poorer cognition than those in individuals with asymptomatic hyperuricemia. The present study aimed at evaluating cognitive function in patients suffering from gout in an elderly male population, and further investigating the genetic contributions to the risk of cognitive function.This study examined the cognitive function as assessed by Mini-Mental State Examination (MMSE) and the Montreal Cognitive Assessment (MoCA) in 205 male gout patients and 204 controls...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28941592/dysregulation-of-serum-nadph-oxidase1-and-ferritin-levels-provides-insights-into-diagnosis-of-parkinson-s-disease
#5
Mohsen Hemmati-Dinarvand, Ali-Akbar Taher-Aghdam, Ali Mota, Sepideh Zununi Vahed, Nasser Samadi
OBJECTIVE: Parkinson's disease (PD) is a common neurodegenerative disease. Oxidative stress is considered as a key modulator in the development of PD. This study aimed to investigate associations between serum NOX1 (NADPH oxidase1), ferritin, selenium (Se) and uric acid (UA) levels and clinical parameters in patients with PD. DESIGN AND METHODS: Serum levels of NOX1, ferritin, Se and UA were measured in 40 PD patients and 40 healthy individuals. Receiver operating characteristic (ROC) analysis was performed to investigate incremental diagnostic value of each factor in the study groups...
September 20, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28933745/effects-of-six-week-ginkgo-biloba-supplementation-on-aerobic-performance-blood-pro-antioxidant-balance-and-serum-brain-derived-neurotrophic-factor-in-physically-active-men
#6
Ewa Sadowska-Krępa, Barbara Kłapcińska, Ilona Pokora, Przemysław Domaszewski, Katarzyna Kempa, Tomasz Podgórski
Extracts of Ginkgo biloba leaves, a natural source of flavonoids and polyphenolic compounds, are commonly used as therapeutic agents for the improvement of both cognitive and physiological performance. The present study was aimed to test the effects of a six-week supplementation with 160 mg/day of a standardized extract of Ginkgo biloba or a matching placebo on aerobic performance, blood antioxidant capacity, and brain-derived neurotrophic factor (BDNF) level in healthy, physically active young men, randomly allocated to two groups (n = 9 each)...
July 26, 2017: Nutrients
https://www.readbyqxmd.com/read/28922153/sex-dependent-associations-of-serum-uric-acid-with-brain-function-during-aging
#7
Alexandra M Kueider, Yang An, Toshiko Tanaka, Melissa H Kitner-Triolo, Stephanie Studenski, Luigi Ferrucci, Madhav Thambisetty
Serum uric acid (SUA) is an abundant natural antioxidant capable of reducing cellular oxidation, a major cause of neurodegenerative disease. In line with this, SUA levels are lower in Alzheimer's disease; however, the association between SUA and cognition remains unclear. Results from studies examining the effects of SUA on cognition may be difficult to interpret in the context of normal versus pathological aging. This study examined sex-specific associations of baseline SUA with cognition during aging. Data from dementia-free participants initially aged 26-99 (N = 1,451) recruited for the Baltimore Longitudinal Study of Aging (BLSA), were used in the current analyses...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28764656/relationship-between-serum-uric-acid-level-and-mild-cognitive-impairment-in-chinese-community-elderly
#8
Miao Liu, Jianhua Wang, Jing Zeng, Yao He
BACKGROUND: To evaluate the association between SUA levels within a normal to high range and the risk of mild cognitive impairment (MCI) among community elderly. METHODS: The present study was based on 2102 community elderly from a cross-sectional study conducted in a representative urban area of Beijing between 2009 and 2010. The mean age were 71.2 ± 6.6 years old, 59.7% were female. Mini-Mental State Examination (MMSE) was used to assess cognitive function by trained neurology doctors...
August 1, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28592718/long-term-subclinical-hyperglycemia-and-hypoglycemia-as-independent-risk-factors-for-mild-cognitive-impairment-in-elderly-people
#9
Feng Wang, Minghui Zhao, Zhaoli Han, Dai Li, Shishuang Zhang, Yongqiang Zhang, Xiaodong Kong, Qiang Zhang, Ping Lei
Dementia is one of the most common geriatric diseases, and mild cognitive impairment (MCI) is considered to be incipient dementia. MCI patients have elevated risk of progressing to dementia. Multiple metabolic abnormalities have an unconfirmed effect on MCI risk, and taking adequate measures against metabolic abnormalities might prevent the developing of MCI. Thus, the present study explored the association of MCI risk with common metabolic abnormalities, such as hyperglycemia, hypoglycemia, hyperlipidemia and hypouricemia, and to provide the basis for MCI prevention...
June 2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28554217/oxidative-stress-markers-and-metal-ions-are-correlated-with-cognitive-function-in-alzheimer-s-disease
#10
Zhengping Pu, Wenjie Xu, Yong Lin, Jincai He, Manli Huang
We investigated oxidative stress markers and metal ions in patients with Alzheimer's disease (AD). The serum levels of ceruloplasmin (CER), C-reactive protein (CRP), uric acid (UA), homocysteine (Hcy), copper, iron, and zinc were determined in 125 patients with AD (mild, n = 2 8; moderate, n = 42; and severe, n = 55) and 40 healthy control (HC) participants. Compared to HC, CER and UA levels were significantly lower in moderate and severe AD groups, whereas CRP and Hcy levels were significantly higher in the severe AD group...
September 2017: American Journal of Alzheimer's Disease and Other Dementias
https://www.readbyqxmd.com/read/28529242/hyperuricemia-as-a-protective-factor-for-mild-cognitive-impairment-in-non-obese-elderly
#11
Feng Wang, Minghui Zhao, Zhaoli Han, Dai Li, Shishuang Zhang, Yongqiang Zhang, Xiaodong Kong, Ning Sun, Qiang Zhang, Ping Lei
Mild cognitive impairment (MCI) is regarded as incipient dementia. Patients with MCI have increased risk of later progressing to dementia. Blood uric acid (UA) is an important non-enzymatic antioxidant in peripheral circulation, and plays an unconfirmed protective role in MCI. Furthermore, obesity-induced inflammation, which affects UA metabolism and MCI onset, might regulate such protective role. Thus, the aim of the study was to determine the relationship of UA to MCI and the potential effect from inflammation...
May 2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28489814/diagnostic-values-of-serum-levels-of-homocysteine-and-uric-acid-for-predicting-vascular-mild-cognitive-impairment-in-patients-with-cerebral-small-vessel-disease
#12
Ting Wang, Zhong-Wu Sun, Liang-Qing Shao, Xiao-Bin Xu, Yang Liu, Mao Qin, Xiang Weng, Yong-Xiang Zhang
BACKGROUND This study aimed to investigate the diagnostic values of serum levels of Hcy and UA for predicting vascular mild cognitive impairment (VMCI) in patients with cerebral small vessel disease (SVD). MATERIAL AND METHODS We selected 172 cerebral SVD patients and divided them into a VMCI group and a non-VMCI group. Eighty-six healthy individuals without nervous system diseases were selected as the control group. Enzymatic cycling method was performed to detect serum Hcy and UA levels. Serum levels of folic acid (FOA) and vitamin B12 (VitB12) were detected by chemiluminescence immunoassay...
May 10, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28420204/fructose-intake-serum-uric-acid-and-cardiometabolic-disorders-a-critical-review
#13
REVIEW
Cristiana Caliceti, Donato Calabria, Aldo Roda, Arrigo F G Cicero
There is a direct relationship between fructose intake and serum levels of uric acid (UA), which is the final product of purine metabolism. Recent preclinical and clinical evidence suggests that chronic hyperuricemia is an independent risk factor for hypertension, metabolic syndrome, and cardiovascular disease. It is probably also an independent risk factor for chronic kidney disease, Type 2 diabetes, and cognitive decline. These relationships have been observed for high serum UA levels (>5.5 mg/dL in women and >6 mg/dL in men), but also for normal to high serum UA levels (5-6 mg/dL)...
April 18, 2017: Nutrients
https://www.readbyqxmd.com/read/28387669/a-prospective-study-on-the-association-between-uric-acid-and-cognitive-function-among-middle-aged-and-older-chinese
#14
Tong Wang, Yili Wu, Yongye Sun, Long Zhai, Dongfeng Zhang
BACKGROUND: Uric acid (UA) is a powerful antioxidant that may have neuroprotective properties, yet it is also a risk factor of vascular disease that predisposes individuals to cognitive impairment. Results from longitudinal studies on UA and cognitive decline remain controversial. OBJECTIVE: We examined the associations of baseline plasma UA level with follow-up cognitive function as well as cognitive decline over time among a large sample of middle-aged and older Chinese...
2017: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/28300627/serum-uric-acid-is-associated-with-better-executive-function-in-men-but-not-in-women-baseline-assessment-of-the-elsa-brasil-study
#15
MULTICENTER STUDY
Cristina Pellegrino Baena, Claudia Kimie Suemoto, Sandhi Maria Barreto, Paulo Andrade Lotufo, Isabela Benseñor
BACKGROUND: Serum uric acid (SUA) may protect against free radical stress damage and was previously linked to cognitive impairment in older adults, but evidence in middle-aged adults is scarce. PURPOSE: We sought to analyze whether SUA is associated with cognitive performance in apparently healthy middle-aged participants in the ELSA-Brasil cohort study. METHODS: We excluded participants older than age 65, those taking allopurinol, benzbromarone, or medications that could impair cognitive performance, those with previous stroke, and those with incomplete data on cognitive tests or SUA...
June 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28251464/serum-uric-acid-levels-and-freezing-of-gait-in-parkinson-s-disease
#16
Ruwei Ou, Bei Cao, Qianqian Wei, Yanbing Hou, Yaqian Xu, Wei Song, Bi Zhao, Huifang Shang
Uric acid (UA) is a natural antioxidant and iron scavenger in the human body, which has been hypothesized to exert an anti-oxidative effect in Parkinson's disease (PD). This study aimed to investigate the relationship between serum UA levels and freezing of gait (FOG) in PD. A total of 321 Chinese PD patients with fasting serum UA evaluated were included in the cross-sectional study. Demographics, clinical features, and therapeutic regimen were collected. The Unified PD Rating Scale (UPDRS) III and Hoehn and Yahr (H and Y) stage were used to evaluate the severity of disease, and the Frontal Assessment Battery (FAB) and Montreal Cognitive Assessment (MoCA) scales were used to assess the cognitive function...
June 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28239527/uric-acid-is-associated-with-vascular-dementia-in-chinese-population
#17
Yuzhen Xu, Qian Wang, Ruiting Cui, Kaili Lu, Yunlin Liu, Yuwu Zhao
OBJECTIVE: Mounting evidence suggests that oxidative stress is involved in the pathogenesis of vascular dementia (VD). Uric acid (UA) has long been implicated as a critical cause of cardiovascular disease. Nevertheless, UA was also expected to play an important role in antioxidant and neuroprotection recently. We hypothesized that UA may have a protective role against VD. The aim of this study was to investigate the link between serum UA and cognitive dysfunction in VD. MATERIALS AND METHODS: There were altogether 127 VD subjects and 81 nondemented controls enrolled in our study...
February 2017: Brain and Behavior
https://www.readbyqxmd.com/read/28203247/elevated-serum-uric-acid-levels-are-related-to-cognitive-deterioration-in-an-elderly-japanese-population
#18
Kazushi Suzuki, Daisuke Koide, Kurumi Fujii, Tsutomu Yamazaki, Shoji Tsuji, Atsushi Iwata
AIMS: The association between serum uric acid (UA) levels and cognitive function is controversial since UA can be a risk factor for cerebral ischemia as well as acting as a neuroprotective antioxidant. METHODS: We conducted a cross-sectional analysis of 228 elderly participants and examined neuropsychological test results, clinical data as well as brain magnetic resonance imaging data. PATIENTS: Overall, 64 participants were diagnosed with cognitive deterioration...
September 2016: Dementia and Geriatric Cognitive Disorders Extra
https://www.readbyqxmd.com/read/28062372/uric-acid-may-be-protective-against-cognitive-impairment-in-older-adults-but-only-in-those-without-cardiovascular-risk-factors
#19
Busra Tuven, Pinar Soysal, Gulcin Unutmaz, Derya Kaya, Ahmet Turan Isik
Uric acid (UA) may not only prevent development of cognitive dysfunction owing to its antioxidant efficacy, but also may worsen cognitive functions by gaining pro-oxidant character. The present study attempts to uncover this paradoxical association between UA and cognitive impairment in elderly. 1374 elderly patients were retrospectively evaluated and included in the study. Participants underwent determination of circulating UA levels and comprehensive geriatric assessment. A serum UA concentration≥7.0mg/dL in males and ≥5...
March 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/27916816/blueberry-consumption-affects-serum-uric-acid-concentrations-in-older-adults-in-a-sex-specific-manner
#20
Carol L Cheatham, Itzel Vazquez-Vidal, Amanda Medlin, V Saroja Voruganti
Blueberries are rich in antioxidants and may protect against disease. Uric acid accounts for about 50% of the antioxidant properties in humans. Elevated levels of serum uric acid (SUA) or hyperuricemia is a risk factor for cardiovascular disease (CVD). The aim was to determine the effect of blueberries on SUA in older adults. Participants (n = 133, 65-80 years) experiencing mild cognitive impairment (MCI) were randomized in a double-blind 6-month clinical trial to either blueberry or placebo. A reference group with no MCI received no treatment...
November 29, 2016: Antioxidants (Basel, Switzerland)
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