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Atractylodeslancea Rhizoma (Rhizoma atractylodis [RA]) has long been recommended for the treatment of arthritis in traditional Chinese medicine, but its mechanism of action is still unclear. RA contains a large amount of Atractylodes lancea volatile oils (Atr). In this study, we investigated whether Atr can promote mesenchymal stem cells (MSCs) chondrogenic differentiation. The Atr were extracted from RA by steam distillation method, and the effect of Atr on MSCs was detected by the CCK8 assay. The optimal concentration of Atr for MSCs cultivation was 3 μg/ml. The differentially expressed miR-181a-5p was screened by miRNA microarray assay, and its mimics and inhibitors were transfected into MSCs. It was found that the inhibitor of miR-181a-5p could upregulate cartilage-specific genes such as SOX9, COL2A1, and ACAN. Meanwhile, we also found that the expression of gene editing enzyme ADAR2 was significantly increased in the chondrogenic differentiation of MSCs induced by Atr, and the bases of precursor sequence of miR-181a-5p were changed from A to G. After ADAR2 deletion, the expression of cartilage-specific genes was significantly down-regulated and the precursor sequence bases of miR-181a-5p were not changed. Bioinformatics analysis revealed that the predicted target gene of miR-181a-5p was yingyang1 (YY1), and the targeting relationship was verified by dual-luciferase reporter assay. After deleting YY1, the expression of cartilage-specific genes was significantly down-regulated. In conclusion, our study demonstrated that Atr can promote chondrogenic differentiation of MSC through regulation of the ADAR2-miR-181a-5p signaling pathway. This may provide a new insight into the possible mechanism of traditional Chinese medicine (Atr) in treating inflammatory joint diseases.中药苍术(atractylodlancea Rhizoma, RA)在中医临床研究中发现其对关节软骨类疾病具有疗效，但它的作用机制尚不清楚。苍术的主要活性成分是苍术挥发油(Atractylodes lancea volatile oils)，我们的研究发现苍术挥发油能促进间充质干细胞(MSC)成软骨细胞分化。本研究采用水蒸气蒸馏法提取苍术挥发油，通过CCK8实验检测苍术挥发油对MSC的毒性作用，以3μg/ml为最佳作用浓度并用于后续MSC的诱导培养。通过miRNA芯片筛选出差异表达的miR-181a-5p，将其模拟物及抑制物转染至MSC内，发现miR-181a-5p的抑制物可以上调软骨基因SOX9、COL2A1及ACAN。同时我们发现，在苍术挥发油诱导MSC成软骨细胞分化中，基因编辑酶ADAR2的表达显著上升，miR-181a-5p的前体序列碱基发生了A-G的改变；删失ADAR2酶后，软骨基因的表达显著下调，miR-181a-5p的前体序列碱基没有改变。而后使用生物信息学网站预测miR-181a-5p的靶基因是Yingyang1 (YY1)，通过构建双荧光素酶报告基因验证靶向关系；删失YY1后，软骨基因的表达显著下调。综上所述，苍术挥发是通过ADAR2- miR-181a-5p信号通路进而促进MSC成软骨细胞分化，本研究可为中药苍术治疗关节软骨类疾病的机制研究提供新的见解。.

In order to improve the classification effect of ideological and political resources of audio hosting professional courses and improve the classification accuracy of ideological and political resources of courses, this paper puts forward a classification method of ideological and political resources of broadcasting and hosting professional courses based on SOM artificial neural network. The adaptive sliding window mutual information method is used to extract the sample characteristics of ideological and political resources of broadcasting and hosting professional courses. This paper constructs the classification model of ideological and political resources of broadcasting and hosting professional courses through deep belief neural network, designs the ideological and political resources classifier of broadcasting and hosting professional courses according to SOM artificial network, constructs the ideological and political resources feature tree of broadcasting and hosting professional courses, and obtains the leaf nodes of the feature tree through hierarchical aggregation algorithm. The category of ideological and political resources of broadcasting and hosting professional courses is obtained by using the merging processing method, the classification operation results are verified by BIC criterion, the number of clusters with the maximum growth distance, that is, the final number of clusters, is calculated and brought into the classifier, and the classification results of SOM artificial network classifier are output to realize the classification of ideological and political resources of broadcasting and hosting professional courses. The experimental results show that, under this method, the accuracy of ideological and political resources classification of broadcasting and hosting professional courses can reach 99.18%, and the completeness is as high as 99.58%, and the F-measure value is effectively improved, which shows that this method can improve the effect of ideological and political resources classification of broadcasting and hosting professional courses.

Forkhead box P2 (Foxp2) is a transcription factor involved in vocal learning. However, the number of previous studies that have investigated the role of Foxp2 in early vascular dementia (VD) is limited. The aim of the present study was to determine whether microRNA (miR)‑134‑5p/Foxp2 contributes to cognitive impairment in a chronic ischemia‑induced early VD model. miR‑134‑5p was found to be significantly increased in the cortex in a rat VD model. Intracerebroventricular injection of miR‑134‑5p antagomir into VD rats prevented the loss of synaptic proteins and the development of cognitive impairment phenotypes. Histopathological analysis revealed that miR‑134‑5p aggravated cognitive impairment in VD rats through damage to cortical neurons and loss of synaptic proteins. Bioinformatics analysis predicted that miR‑134‑5p targets Foxp2 mRNA. Dual luciferase analysis and western blotting supported the prediction that miR‑134‑5p targets Foxp2. Furthermore, the silencing of Foxp2 significantly inhibited the effect of miR‑134‑5p on synaptic protein loss. Chromatin immunoprecipitation‑quantitative polymerase chain reaction analysis indicated that Foxp2 binds to the synapsin I (Syn1) promoter at ‑400/‑600 bp upstream of the transcription start site. In conclusion, the miR‑134‑5p/Foxp2/Syn1 axis was found to contribute to cognitive impairment in a chronic ischemia‑induced early VD model, which may enable the development of new therapeutic strategies for the prevention and treatment of VD.

Parkinson's disease (PD) is the second most prevalent neurodegenerative disease worldwide. Recent studies revealed that the ferroptosis pathway is involved in the death process of dopaminergic neurons in PD. The aberrant endosomal sorting pathway, which results in aberrant iron level in eukaryotic cells, may serve a role in the ferroptosis pathway in PD condition. However, its specific molecular mechanisms remained unclear. In the present study, we performed chromatin immunoprecipitation (ChIP) assay, the rank ordering of super-enhancers (ROSE) algorithm, and RNA interference (RNAi) to explore the regulatory mechanism of PD-specific super-enhancer (SE) in the endosomal sorting pathway and ferroptosis pathway of 6-OHDA-lesioned rats and cells. The ChIP assay and ROSE algorithm results showed that there are specific SEs expression in 6-OHDA-lesioned SNc of PD rats, and the most significant expression gene is Sorting Nexin 5 (SNX5). SNX5 silencing by RNAi experiments significantly decreased the level of ferroptosis in 6-OHDA-lesioned PC12 cells, suggesting the correlation between the SNX5, ferroptosis, and PD. In conclusion, this study investigated the mechanism by which PD-specific SE driven SNX5 promoted the ferroptosis level in PD models. This study further improved the understanding of the mechanism of ferroptosis during PD injury and provided potential therapeutic targets and clinical diagnostic markers in PD condition.

BACKGROUND: Hand hygiene is one of the ways to prevent the spread of diseases. Our aim was to explore the relationship between hand washing frequency and the impact on disease, and give recommendations on the number of times to wash hands. METHODS: We searched seven electronic databases from their inception to April 11, 2020, and reference lists of related reviews for all studies on hand washing frequency and disease prevention. The Review Manager 5.3. software was used to conduct a meta-analysis. We assessed the risk of bias of included studies, and quality of evidence of the main findings. RESULTS: A total of eight studies were included. The results of the meta-analysis showed that there was no statistical significance between the effect of disease prevention and washing more than 4 times/day compared to not [odds ratio (OR) =0.61, 95% confidence interval (CI): 0.37 to 1.01]. The results of a case-control study showed that compared with hand washing ≤4 times/day, hand washing 5–10 times/day (OR =0.75, 95% CI: 0.63 to 0.91) and hand washing >10 times/day (OR =0.65, 95% CI 0.53 to 0.80) could reduce the risk of disease infection. There was no statistical significance advantage to hand washing more than 10 times/day compared to 5–10 times/day (OR =0.86, 95% CI: 0.70 to 1.06). Comparing hand washing ≤10 times/day with hand washing >10 times/day, increased hand washing was a protective factor against infection (OR =0.59, 95% CI: 0.36 to 0.97). CONCLUSIONS: The more frequently hands were washed, the lower risk of disease. So far however, there is no high-quality evidence indicating the best range of hand washing frequency for disease prevention.

Background：The Rhizoma Atractylodis has long been recommended for the treatment of different diseases in traditional Chinese medicine. The main component of Rhizoma Atractylodis is Atractylodes lancea volatile oils which possesses anti-microorganism, anti-tumor, cognitive protection and immunoregulation. The aim of the study was to elucidate the mechanism of Atractylodes lancea volatile oils promoting mesenchymal stem cells (MSCs) chondrogenic differentiation. Method：Atractylodes lancea volatile oils were extracted from Chinese medicine Cangzhu by volatile oil extractor. MSCs culture were treated with Atractylodes lancea volatile oils medium. Real-time reverse transcription PCR was conducted to verify the candidate microRNAs discovered by microarray analysis. Western-blot analyzed the expressions of mark genes. Sanger sequences identified the changes of the base pairs which would be edited by ADAR2 enzyme. Toluidine blue staining identified the changes of cells chondrogenic differentiation. Result：Treatment of Atractylodes lancea volatile oils increased the cells chondrogenic differentiation of MSCs. Atractylodes lancea volatile oils promoted the expression of ADAR2 enzyme which may edit the precursor of miR-181a-5p. A dual luciferase reporter system assay verified that transcription factors yingyang1(YY1) was targeted by miR-181a-5p which was downregulated in MSCs chondrogenic differentiation. Conclusion：This work demonstrates the mechanism of Atractylodes lancea volatile oils promoting MSCs to chondrogenic differentiation. It may provide an alternative strategy for treatment purposes and diagnosis in clinic.

Ferroptosis is associated with neural degeneration of dopaminergic neurons in Parkinson’s disease (PD). However, how to control the level of ferroptosis in PD remains unclear. Clinically, moxibustion has been used to treat PD and has an apparent therapeutic effect on improving the motor symptoms of PD. In the present study, the PD rat model was constructed by two-point stereotactic 6-hydroxydopamine injection. Then, moxibustion was used to treat the PD rats. The expression of glutathione peroxidase 4 (GPX4) and Ferritin Heavy Chain 1 (FTH1), the level of reactive oxygen species (ROS), and the morphology of mitochondrial were detected to evaluate the level of ferroptosis. The results showed that moxibustion treatment of Shi’s moxa sticks could reduce the behavioral score, alleviate the level of ferroptosis, decrease mitochondrial damage, and improve dopaminergic neuron survival. In conclusion, the present study results indicated that Shi’s moxa sticks could effectively suppress the level of ferroptosis, thereby improving the survival of dopaminergic neurons in the SNpc of PD rats, which may provide a promising complementary and alternative therapy for PD patients.

Low earth orbit (LEO) satellites have broad application prospects in the 5G / 6G communication era due to their high coverage. From the simulation of a constellation of 2000 LEO satellites, the minimum mean value of passing through the same antenna in one minute is more than 60, which far exceeds the monitoring capabilities of telemetry, track and command (TT&C) stations. Code Division Multiple Access (CDMA) technology wastes a lot of hardware resources, and Frequency Division Multiple Access (FDMA) technology needs frequency band resources, which are not applicable to this scenario. In this paper, we analyze the theoretical equal E b /N 0 of multiple access interference. According to the frequency information of the orbit of LEO satellite, and the characteristics of burst mode and large time slot interval of TT&C signals, we design a scheme of parallel access of multiple signals by using the unique pseudorandom (PRN) code. Under the existing conditions, this solution greatly improves the monitoring capability of the ground station and reduces the hardware resource consumption of the ground station. We analyze access capabilities based on actual application scenarios. Simulation results show that the scheme can save 80% of hardware resources under the same monitoring capability.

Ethnopharmacological relevance Niujiaodihuang Detoxify Decoction (NDD) is an integrated traditional Chinese medicine prescription that has been used as a therapeutic agent for the treatment of acute liver failure (ALF). However, the mechanisms underlying its action remain unclear. Aim of the study: To determine the protective effect of NDD on D-galactosamine/lipopolysaccharide (D-GalN/LPS)-induced ALF and explore the underlying mechanisms. Materials and methods We characterized the NDD fingerprint by HPLC and established D-GalN/LPS-induced ALF models in Sprague–Dawley rats and LO2 cells. Next, we measured the protective and antiferroptotic effects of NDD in vivo and in vitro. To further investigate the molecular mechanisms underlying the effects of NDD, we performed metabolomic analysis of the liver tissue using LC-MS/MS. Results Results of serum biochemical analysis, liver histopathology, and cell viability showed that NDD effectively relieved the liver injury. It reduced the accumulation of labile iron and alleviated lipid peroxidation by enhancing GPX4 activity. The mitochondrial morphology indicated that NDD exerted its hepatoprotective effect through an antiferroptotic activity. Metabolomic analysis showed that NDD treatment increased the levels of cysteine, decreased those of glutamate, and ameliorated the D-GalN/LPS-induced reduction in the levels of glutathione (GSH). The results for intracellular levels of reduced (GSH) and oxidized (GSSG) glutathione were consistent with those of metabolomic analysis. Conclusion Our findings indicate that NDD exerts hepatoprotective activity by evoking the reprogramming of GSH metabolism, and thereby, inhibiting ferroptosis.

Vascular dementia (VD) is the most common form of dementia in elderly people. However, little is understood about the role of microRNAs (miRNAs) involved in cognitive impairment in early VD. Here, a VD model induced by chronic cerebral ischemia and fetal bovine serum (FBS)-free cell model that detects synapse formation was established to investigate the function of miRNAs in early VD. The microarray analysis and real-time reverse transcription polymerase chain reaction (RT-PCR) showed that miR-210-5p increased significantly in the hippocampus of rats with 4 weeks of ischemia. The VD model rats also displayed significant cognitive deficits and synaptic loss. The overexpression of miR-210-5p decreased the synaptic number in primary hippocampal neurons, whereas specific suppression of miR-210-5p resulted in the formation of more synapses. Additionally, intracerebroventricular (ICV) injection of miR-210-5p agomir to VD rats aggravated phenotypes of cognitive impairment and synaptic loss. These VD-induced phenotypes were effectively attenuated by miR-210-5p antagomir. Moreover, bioinformatic prediction revealed that synaptosomal-associated protein of 25 KDa (Snap25) mRNA is targeted by miR-210-5p. The miR-210-5p decreased the luciferase activities of 3’ untranslated region (3’UTR) of Snap25 mRNA. Mutation of predicted miR-210-5p binding sites in the 3’ UTR of Snap25 mRNA abolished the miR-210-5p-induced decrease in luciferase activity. Western blot and immunofluorescence staining confirmed that miR-210-5p targets Snap25. Finally, RT-quantitative PCR (qPCR) and immunofluorescence staining detected that miR-210-5p agomir downregulated Snap25 expression in the cornu ammonis1 (CA1) region of hippocampi in VD rats, whereas miR-210-5p antagomir upregulated Snap25 expression. Altogether, miR-210-5p contributes to cognitive impairment in chronic ischemia-induced VD model through the regulation of Snap25 expression, which potentially provides an opportunity to develop a new therapeutic strategy for VD.

Under harmful environmental conditions, stress granules (SGs), macromolecular aggregates that are associated with cell survival and death, are produced in the eukaryotic cytoplasm. However, whether and how microRNAs (miRNAs/miRs) modulate SG formation induced by acute ischemic stroke has not been investigated. In the present study, a rat model of middle cerebral artery occlusion (MCAO) was utilized and miRNA array profiling and reverse transcription-quantitative polymerase chain reaction were performed. The results revealed that miR-335 was downregulated during acute ischemic stroke, which was concomitant with reduced SG formation, enhanced apoptosis levels and increased Rho associated protein kinase 2 (ROCK2) expression. In the MCAO rat and serum-free cell models, miR-335 treatment upregulated SG formation, alleviated the ischemia-induced infarction, and decreased ROCK2 protein expression and apoptosis levels. By contrast, when compared with miR-335 treatment, the inhibition of miR-335 resulted in reduced SG formation and higher ROCK2 expression and apoptosis levels. Target prediction analysis and luciferase 3′-untranslated region reporter assay identified ROCK2 as the direct target of miR-335. Furthermore, ROCK2 silencing enhanced SG formation and attenuated the level of apoptosis in the serum-free cell model. In addition, ROCK2 silencing markedly inhibited the effect of miR-335 on SG formation and apoptosis levels. Unexpectedly, the phosphorylation of T-cell intracellular antigen-1 was significantly inhibited by miR-335 in the MCAO rat model, which provides a reasonable explanation for the promotional effect of miR-335 on SG formation by specifically targeting ROCK2. In conclusion, these results demonstrate that miR-335 promotes SG formation and inhibits apoptosis by reducing ROCK2 expression in acute ischemic stroke, which provides a possible therapeutic target for brain injury.

We present a novel Augmented Reality (AR) approach, through Microsoft HoloLens, to address the challenging problems of diagnosing, teaching, and patching interpretable knowledge of a robot. A Temporal And-Or graph (T-AOG) of opening bottles is learned from human demonstration and programmed to the robot. This representation yields a hierarchical structure that captures the compositional nature of the given task, which is highly interpretable for the users. By visualizing the knowledge structure represented by a T-AOG and the decision making process by parsing the T-AOG, the user can intuitively understand what the robot knows, supervise the robot's action planner, and monitor visually latent robot states (e.g., the force exerted during interactions). Given a new task, through such comprehensive visualizations of robot's inner functioning, users can quickly identify the reasons of failures, interactively teach the robot with a new action, and patch it to the current knowledge structure. In this way, the robot is capable of solving similar but new tasks only through minor modifications provided by the users interactively. This process demonstrates the interpretability of our knowledge representation and the effectiveness of the AR interface.

Ischemic strokes carry a significant risk of mortality and recurrent vascular events. Recent studies suggest that changes in microRNAs (miRNAs or miRs) may affect the development of the stroke. However, few studies have investigated the role of miRNAs in behavioral disorder in early stroke. In the present study, animal models of middle cerebral artery occlusion (MCAO) are used, as well as a cell model of neurite outgrowth to further investigate the role of miRNAs in targeting synapse-associated proteins expression in early stroke. The authors used miRNA expression microarrays on RNA extracted from the cortex tissue samples from the rats of MCAO and control rats. Reverse transcription‑quantitative polymerase chain reaction was conducted to verify the candidate miRNAs discovered by microarray analysis. Data indicated that miR‑125a was significantly increased in the cortex of the model of MCAO, which were concomitant with that rats of MCAO at the same age displayed significant behavioral deficits. Bioinformatics analysis predicted the cell adhesion molecule 2 (Cadm2, mRNA) neurite outgrowth-associated protein is targeted by miR‑125a. Overexpression of miR‑125a reduced the level of Cadm2 expression in PC12 cell injury induced by free-serum. In contrast, inhibition of miR‑125a using miR‑125a inhibitors significantly resulted in higher levels of Cadm2 expression. In conclusion, miR‑125a is involved in the behavioral disorder of animal models of MCAO by regulation of Cadm2.