TY - JOUR
T1 - Biomarkers for evaluating the effects of exercise interventions in patients with MCI or dementia
T2 - A systematic review and meta-analysis
AU - Huang, Xiuxiu
AU - Zhao, Xiaoyan
AU - Li, Bei
AU - Cai, Ying
AU - Zhang, Shifang
AU - Yu, Fang
AU - Wan, Qiaoqin
N1 - Funding Information: The authors thank Lei Zhang from Shanghai University of Sport for searching the electronic database of SPORTDiscus. We also thank for the financial support from the National Natural Science Foundation of China . Funding Information: The authors thank Lei Zhang from Shanghai University of Sport for searching the electronic database of SPORTDiscus. We also thank for the financial support from the National Natural Science Foundation of China. This research was founded by the National Natural Science Foundation of China (81871854). The sponsor had no any involvement in this study. Funding Information: This research was founded by the National Natural Science Foundation of China ( 81871854 ). The sponsor had no any involvement in this study. Publisher Copyright: © 2021
PY - 2021/8
Y1 - 2021/8
N2 - Objectives: To summarize the biomarkers for evaluating the effects of exercise interventions in patients with cognitive impairment associated with aging, as well as their responses to exercise interventions. Design: A systematic review and meta-analysis Methods: We systematically searched different electronic database, including PubMed, Cochrane Central Register of Controlled Trials, Embase, Web of Science, PsycINFO, SPORTDiscus up to April 2020. Clinical controlled trials with exercise interventions in patients with cognitive impairment were included. The main outcomes included all the biomarkers used to evaluate the effects of exercise interventions. If data for certain biomarkers was enough (more than 2 studies), meta-analyses would be performed to estimate the effect sizes by calculating the standard mean differences (SMDs) and 95% confidence intervals (CIs). Results: Finally, we included 33 articles from 26 trials. The biomarkers included neurotrophic factors, inflammatory factors, oxidative stress markers, neuropathological hallmarks, metabolic biomarkers and genotypes. The meta-analyses indicated that exercise significantly decreased the levels of IL-6 (SMD = −0.45; 95% CI: −0.72, −0.18) and low-density lipoprotein (SMD = −0.26; 95% CI: −0.50, −0.01). Subgroup analyses showed that aerobic exercise also could decrease the levels of TNF-α (SMD = −1.21; 95% CI: −2.29, −0.14). There were some important cognition-related biomarkers which were rarely measured, such as Aβ, tau and IGF-1. Conclusion: Regular exercise showed positive effects on reducing inflammation and regulating lipid metabolism. But the available evidence is limited and more studies with different exercise interventions should be conducted to test the effects of exercise on other important cognition-related biomarkers in patients with cognitive dysfunction.
AB - Objectives: To summarize the biomarkers for evaluating the effects of exercise interventions in patients with cognitive impairment associated with aging, as well as their responses to exercise interventions. Design: A systematic review and meta-analysis Methods: We systematically searched different electronic database, including PubMed, Cochrane Central Register of Controlled Trials, Embase, Web of Science, PsycINFO, SPORTDiscus up to April 2020. Clinical controlled trials with exercise interventions in patients with cognitive impairment were included. The main outcomes included all the biomarkers used to evaluate the effects of exercise interventions. If data for certain biomarkers was enough (more than 2 studies), meta-analyses would be performed to estimate the effect sizes by calculating the standard mean differences (SMDs) and 95% confidence intervals (CIs). Results: Finally, we included 33 articles from 26 trials. The biomarkers included neurotrophic factors, inflammatory factors, oxidative stress markers, neuropathological hallmarks, metabolic biomarkers and genotypes. The meta-analyses indicated that exercise significantly decreased the levels of IL-6 (SMD = −0.45; 95% CI: −0.72, −0.18) and low-density lipoprotein (SMD = −0.26; 95% CI: −0.50, −0.01). Subgroup analyses showed that aerobic exercise also could decrease the levels of TNF-α (SMD = −1.21; 95% CI: −2.29, −0.14). There were some important cognition-related biomarkers which were rarely measured, such as Aβ, tau and IGF-1. Conclusion: Regular exercise showed positive effects on reducing inflammation and regulating lipid metabolism. But the available evidence is limited and more studies with different exercise interventions should be conducted to test the effects of exercise on other important cognition-related biomarkers in patients with cognitive dysfunction.
KW - Biomarkers
KW - Dementia
KW - Exercise
KW - Mild cognitive impairment
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U2 - 10.1016/j.exger.2021.111424
DO - 10.1016/j.exger.2021.111424
M3 - Review article
C2 - 34051283
SN - 0531-5565
VL - 151
JO - Experimental Gerontology
JF - Experimental Gerontology
M1 - 111424
ER -