Alzheimer’s disease (AD) is the most common degenerative disease of the nervous system. Studies have found that the 40 Hz pulsed magnetic field has the effect of improving cognitive ability in AD, but the mechanism of action is not clear. In this study, APP/PS1 double transgenic AD model mice were used as the research object, the water maze was used to group dementia, and 40 Hz/10 mT pulsed magnetic field stimulation was applied to AD model mice with different degrees of dementia. The behavioral indicators, mitochondrial samples and electrocardiogram signals of hippocampal CA1 region were collected from each group, and the effects of 40 Hz pulsed magnetic field on mouse behavior, mitochondrial kinetic indexes and heart rate variability (HRV) parameters were analyzed. The results showed that compared with the AD group, the loss of mitochondrial crest structure was alleviated and the mitochondrial dynamics related indexes were significantly improved in the AD + stimulated group (P<0.001), sympathetic nerve excitation and parasympathetic nerve inhibition were improved, and the spatial cognitive memory ability of mice was significantly improved (P<0.05). The preliminary results of this study show that 40 Hz pulsed magnetic field stimulation can improve the mitochondrial structure and mitochondrial kinetic homeostasis imbalance of AD mice, and significantly improve the autonomic neuromodulation ability and spatial cognition ability of AD mice, which lays a foundation for further exploring the mechanism of ultra-low frequency magnetic field in delaying the course of AD disease and realizing personalized neurofeedback therapy for AD.
ObjectiveTo systematically review the diagnostic value of T-SPOT.TB and QuantiFERON-TB (QFT-GIT/QFT-Plus) in active tuberculosis (ATB). MethodsThe PubMed, Web of Science, Cochrane Library, EMbase, CNKI, WanFang Data, and CBM databases were electronically searched to collect diagnostic accuracy studies comparing QFT-GIT/QFT-Plus and T-SPOT.TB for diagnosing ATB from inception to February 8, 2022. Two reviewers independently screened literature, extracted data and assessed the risk of bias of the included studies, then, meta-analysis was performed by using Stata 16.0 software. ResultsA total of 20 studies were included. The results of meta-analysis showed that the pooled sensitivity of T-SPOT.TB and QFT-GIT were 0.89 (95%CI 0.85 to 0.92) and 0.84 (95%CI 0.79 to 0.89), the pooled specificity were 0.85 (95%CI 0.68 to 0.93) and 0.86 (95%CI 0.72 to 0.94), the area under the curve (AUC) of summary receiver operating characteristic (SROC) were 0.93 (95%CI 0.84 to 0.97) and 0.90 (95%CI 0.56 to 0.99), respectively. The pooled sensitivity of T-SPOT.TB and QFT-Plus were 0.93 (95%CI 0.81 to 0.97) and 0.93 (95%CI 0.89 to 0.96), specificity were 0.99 (95%CI 0.39 to 1.00) and 0.94 (95%CI 0.67 to 0.99), the AUC of SROC were 0.99 (95%CI 0.67 to 1.00) and 0.98 (95%CI 0.65 to 1.00), respectively. ConclusionBoth T-SPOT.TB and QFT have high diagnostic accuracy for ATB, and the diagnostic sensitivity of T-SPOT.TB is better than QFT-GIT. Due to the limited quality and quantity of the included studies, more high quality studies are needed to verify the above conclusion.