Archives of gerontology and geriatrics最新文献

Background: The association between tea consumption, especially different types, and cognitive function has not been adequately explored. This study aimed to investigate the associations of tea consumption, including status, frequency, and type, with cognitive function, considering selection bias.

Methods: We used data from the Chinese Longitudinal Healthy Longevity Survey (CLHLS) in 2018(N = 8498). Cognitive function was measured by Mini-Mental State Examination (MMSE). Logistic and linear regression were applied to assess the associations of tea consumption with cognitive impairment and cognitive scores, respectively. Propensity score matching (PSM) and inverse probability of treatment weighting (IPTW) were used to balance characteristic differences between groups.

Results: The characteristics of tea consumption status, frequency and type were well balanced between groups after using PSM and IPTW. Drinking tea was associated with less cognitive impairment (OR_adjusted:0.84, OR_PSM:0.84, OR_IPTW:0.87) and higher cognitive scores (Coefficient_adjusted:0.29, Coefficient_PSM:0.33, Coefficient_IPTW:0.29). Regular tea drinkers may have better cognitive function than those who never or rarely consumed (P_trend < 0.05 for both methods). Green tea drinkers had lower prevalence of cognitive impairment (OR_adjusted:0.71, OR_IPTW:0.75) and higher cognitive scores (Coefficient_adjusted:0.45, Coefficient_IPTW:0.54). Men, uneducated, and those with annual income>10,000 RMB were more likely to benefit from flower tea. Significant interactions of tea consumption with age, education and income were observed.

Conclusions: Tea consumption, especially regular and green tea consumption, was associated with less cognitive impairment and higher cognitive scores, even after PSM and IPTW adjustments. Flower teas may have potential protective effect that is worth further study. Age, education and income have synergistic effects with tea consumption on cognitive function.

Introduction: Atrial fibrillation (AF) and dementia are two common comorbidities in emergency departments (ED) that can significantly affect patients' quality of life. The aim of this study was to evaluate the prevalence and long-term impact of dementia on survival in patients with AF.

Methods: We conducted a multicenter prospective observational study and consecutively recruited 2016 AF patients from 20 hospitals in China. The primary endpoint was all-cause mortality and the secondary endpoint was stroke. Multivariate logistic regression and odds ratio (OR) were used to identify clinical factors associated with AF patients with dementia. Four multivariate adjusted Cox proportional hazard models were conducted to evaluate the risk factors associated with endpoints.

Results: Totally, 2.2 % of AF patients were found to have dementia in ED. Older age (OR 1.05, 95 % CI 1.02-1.09, P = 0.005), coronary artery disease (OR 2.61, 95 % CI 1.21-6.05, P = 0.019), previous stroke or transient ischemic attack (TIA) (OR 5.67, 95 %CI 2.92-11.26, P < 0.001) and prior major bleeding (OR 3.89, 95 %CI 1.11-11.49, P = 0.021) were independent risk factors for patients with both AF and dementia. During one-year follow-up, Log-rank analysis presented that dementia decreased overall survival (P < 0.001) and had a higher incidence of stroke (P < 0.001). After adjusting age, body mass index, blood pressure, type of AF, comorbidities and treatments, multivariate Cox models showed that dementia was independently associated with increased mortality and increasing risk of stroke.

Conclusions: Dementia significantly affects the survival and stroke incidence in AF patients. Prioritizing cognitive function screening and comprehensive care in ED is crucial for managing AF effectively.

Purpose: The incidence of vascular dementia (VaD), as one of the main types of dementia in old age, has been increasing year by year, and exploring its pathogenesis and seeking practical and effective treatment methods are undoubtedly the key to solving this problem. Phosphoglycerate translocase 5 (PGAM5), as a crossroads of multiple signaling pathways, can lead to mitochondrial fission, which in turn triggers the onset and development of necroptosis, and thus PGAM5 may be a novel target for the prevention and treatment of vascular dementia.

Methods: Animal model of vascular dementia was established by Two-vessel occlusion (2-VO) method, and cellular model of vascular dementia was established by oxygen glucose deprivation (OGD) method. Neuronal damage was detected in vivo and in vitro in different groups using different concentrations of the PGAM5-specific inhibitor LFHP-1c, and necroptosis and mitochondrial dynamics-related factors were determined.

Results: In vivo experiments, 10 mg/kg^-1 and 20 mg/kg^-1 LFHP-1c improved cognitive deficits, reduced neuronal edema and vacuoles, increased the number of nissl bodies, and it could modulate the expression of Caspase family and Bcl-2 family related proteins and mRNAs and ameliorate neuronal damage. Simultaneously, in vitro experiments, 5 μM, 10 μM and 20 μM LFHP-1c increased the activity and migration number of model cells, reduced the number of apoptotic cells, ameliorated the excessive accumulation of intracellular reactive oxygen species, inhibited the over-activation of caspase-family and Bcl-2-family related proteins and mRNAs, and improved the mitochondrial dynamics of the fission and fusion states. Moreover, in vivo and in vitro experiments have shown that LFHP-1c can also upregulate the expression level of BDNF, inhibit the expression content of TNF-α and ROS, regulate the expression of proteins and mRNAs related to the RIPK1/RIPK3/MLKL pathway and mitochondrial dynamics, and reduce neuronal apoptosis.

Conclusions: Inhibition of PGAM5 expression level can reduce neuronal damage caused by chronic cerebral ischemia and hypoxia, which mainly prevents necroptosis by targeting the RIPK1/RIPK3/MLKL signaling pathway and regulates the downstream mitochondrial dynamics homeostasis system to prevent excessive mitochondrial fission, thus improving cognition and exerting cerebroprotective effects.