Electroencephalogram (EEG) is a non-invasive, high temporal-resolution technique for monitoring brain activity. However, affected by the volume conduction effect, EEG has a low spatial resolution and is difficult to locate brain neuronal activity precisely. The surface Laplacian (SL) technique obtains the Laplacian EEG (LEEG) by estimating the second-order spatial derivative of the scalp potential. LEEG can reflect the radial current activity under the scalp, with positive values indicating current flow from the brain to the scalp (“source”) and negative values indicating current flow from the scalp to the brain (“sink”). It attenuates signals from volume conduction, effectively improving the spatial resolution of EEG, and is expected to contribute to breakthroughs in neural engineering. This paper provides a systematic overview of the principles and development of SL technology. Currently, there are two implementation paths for SL technology: current source density algorithms (CSD) and concentric ring electrodes (CRE). CSD performs the Laplace transform of the EEG signals acquired by conventional disc electrodes to indirectly estimate the LEEG. It can be mainly classified into local methods, global methods, and realistic Laplacian methods. The global method is the most commonly used approach in CSD, which can achieve more accurate estimation compared with the local method, and it does not require additional imaging equipment compared with the realistic Laplacian method. CRE employs new concentric ring electrodes instead of the traditional disc electrodes, and measures the LEEG directly by differential acquisition of the multi-ring signals. Depending on the structure, it can be divided into bipolar CRE, quasi-bipolar CRE, tripolar CRE, and multi-pole CRE. The tripolar CRE is widely used due to its optimal detection performance. While ensuring the quality of signal acquisition, the complexity of its preamplifier is relatively acceptable. Here, this paper introduces the study of the SL technique in resting rhythms, visual-related potentials, movement-related potentials, and sensorimotor rhythms. These studies demonstrate that SL technology can improve signal quality and enhance signal characteristics, confirming its potential applications in neuroscientific research, disease diagnosis, visual pathway detection, and brain-computer interfaces. CSD is frequently utilized in applications such as neuroscientific research and disease detection, where high-precision estimation of LEEG is required. And CRE tends to be used in brain-computer interfaces, that have stringent requirements for real-time data processing. Finally, this paper summarizes the strengths and weaknesses of SL technology and envisages its future development. SL technology boasts advantages such as reference independence, high spatial resolution, high temporal resolution, enhanced source connectivity analysis, and noise suppression. However, it also has shortcomings that can be further improved. Theoretically, simulation experiments should be conducted to investigate the theoretical characteristics of SL technology. For CSD methods, the algorithm needs to be optimized to improve the precision of LEEG estimation, reduce dependence on the number of channels, and decrease computational complexity and time consumption. For CRE methods, the electrodes need to be designed with appropriate structures and sizes, and the low-noise, high common-mode rejection ratio preamplifier should be developed. We hope that this paper can promote the in-depth research and wide application of SL technology.

Metabolic-associated fatty liver disease (MAFLD) and osteoporosis (OP) are two very common metabolic diseases. A growing body of experimental evidence supports a pathophysiological link between MAFLD and OP. MAFLD is often associated with the development of OP. Rutaecarpine (RUT) is one of the main active components of Chinese medicine Euodiae Fructus. Our previous studies have demonstrated that RUT has lipid-lowering, anti-inflammatory and anti-atherosclerotic effects, and can improve the OP of rats. However, whether RUT can improve both fatty liver and OP symptoms of MAFLD mice at the same time remains to be investigated. In this study, we used C57BL/6 mice fed a high-fat diet (HFD) for 4 months to construct a MAFLD model, and gave the mice a low dose (5 mg·kg^-1) and a high dose (15 mg·kg^-1) of RUT by gavage for 4 weeks. The effects of RUT on liver steatosis and bone metabolism were then evaluated at the end of the experiment [this experiment was approved by the Experimental Animal Ethics Committee of Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences (approval number: IMB-20190124D₃03)]. The results showed that RUT treatment significantly reduced hepatic steatosis and lipid accumulation, and significantly reduced bone loss and promoted bone formation. In summary, this study shows that RUT has an effect of improving fatty liver and OP in MAFLD mice.

In the process of maintaining the steady state of bone tissue, the transcription network and signal pathway of the body play a vital role. These complex regulatory mechanisms need precise coordination to ensure the balance between bone formation and bone absorption. Once this balance is broken, it may lead to pathological changes of bone and cartilage, and then lead to various bone diseases. Therefore, it is of great significance to understand these regulatory mechanisms for the prevention and treatment of bone diseases. In recent years, with the deepening of research, more and more lncRNA has been found to be closely related to bone health. Among them, nuclear paraspeckle assembly transcript 1 (NEAT1), as an extremely abundant RNA molecule in mammalian nuclei, has attracted extensive attention. NEAT1 is mainly transcribed from a specific site in human chromosome 11 by RNA polymerase II (RNaseP), which can form two different subtypes NEAT1_1 and NEAT1_2. These two subtypes are different in intracellular distribution and function, but they participate in many biological processes together. Studies have shown that NEAT1 plays a specific role in the process of cell growth and stress response. For example, it can regulate the development of osteoblasts (OB), osteoclasts (OC) and chondrocytes by balancing the differentiation of bone marrow mesenchymal stem cells (BMSCs), thus maintaining the steady state of bone metabolism. This discovery reveals the important role of NEAT1 in bone development and remodeling. In addition, NEAT1 is closely related to a variety of bone diseases. In patients with bone diseases such as osteoporosis (OP), osteoarthritis (OA) and osteosarcoma (OS), the expression level of NEAT1 is different. These differential expressions may be closely related to the pathogenesis and progression of bone diseases. By regulating the level of NEAT1, it can affect a variety of signal transduction pathways, and then affect the development of bone diseases. For example, some studies show that by regulating the expression level of NEAT1, the activity of osteoclasts can be inhibited, and the proliferation and differentiation of osteoblasts can be promoted, thus improving the symptoms of osteoporosis. It is worth noting that NEAT1 can also be used as a key sensor for the prevention and treatment of bone diseases. When exercising or receiving some natural products, the expression level of NEAT1 will change, thus reflecting the response of bones to external stimuli. This feature makes NEAT1 an important target for studying the prevention and treatment strategies of bone diseases. However, although the role of NEAT1 in bone biology and bone diseases has been initially recognized, its specific mechanism and regulatory relationship are still controversial. For example, the expression level, mode of action and interaction with other molecules of NEAT1 in different bone diseases still need further in-depth study. This paper reviews the role of NEAT1 in maintaining bone and cartilage metabolism, and discusses its expression and function in various bone diseases. By combing the existing research results and controversial points, this paper aims to provide new perspectives and ideas for the prevention and treatment of bone diseases, and provide useful reference and enlightenment for future research.

ObjectiveTo investigate the influence of histone deacetylase 3 (HDAC3) on the occurrence, development of psoriasis-like inflammation in mice, and the relative immune mechanisms. MethodsHealthy C57BL/6 mice aged 6-8 weeks were selected and randomly divided into 3 groups: control group (Control), psoriasis model group (IMQ), and HDAC3 inhibitor RGFP966-treated psoriasis model group (IMQ+RGFP966). One day prior to the experiment, the back hair of the mice was shaved. After a one-day stabilization period, the mice in Control group was treated with an equal amount of vaseline, while the mice in IMQ group was treated with imiquimod (62.5 mg/d) applied topically on the back to establish a psoriasis-like inflammation model. The mice in IMQ+RGFP966 group received intervention with a high dose of the HDAC3-selective inhibitor RGFP966 (30 mg/kg) based on the psoriasis-like model. All groups were treated continuously for 5 d, during which psoriasis-like inflammation symptoms (scaling, erythema, skin thickness), body weight, and mental status were observed and recorded, with photographs taken for documentation. After euthanasia, hematoxylin-eosin (HE) staining was used to assess the effect of RGFP966 on the skin tissue structure of the mice, and skin thickness was measured. The mRNA and protein expression levels of HDAC3 in skin tissues were detected using reverse transcription real-time quantitative polymerase chain reaction (RT-qPCR) and Western blot (WB), respectively. Flow cytometry was employed to analyze neutrophils in peripheral blood and lymph nodes, CD4⁺ T lymphocytes, CD8⁺ T lymphocytes in peripheral blood, and IL-17A secretion by peripheral blood CD4⁺ T lymphocytes. Additionally, spleen CD4⁺ T lymphocyte expression of HDAC3, CCR6, CCR8, and IL-17A secretion levels were analyzed. Immunohistochemistry was used to detect the localization and expression levels of HDAC3, IL-17A, and IL-10 in skin tissues. ResultsCompared with the Control group, the IMQ group exhibited significant psoriasis-like inflammation, characterized by erythema, scaling, and skin wrinkling. Compared with the IMQ group, RGFP966 exacerbated psoriasis-like inflammatory symptoms, leading to increased hyperkeratosis. The psoriasis area and severity index (PASI) skin symptom scores were higher in the IMQ group than those in the Control group, and the scores were further elevated in the IMQ+RGFP966 group compared to the IMQ group. Skin thickness measurements showed a trend of IMQ+RGFP966>IMQ>Control. The numbers of neutrophils in the blood and lymph nodes increased sequentially in the Control, IMQ, and IMQ+RGFP966 groups, with a similar trend observed for CD4⁺ and CD8⁺ T lymphocytes in the blood. In skin tissues, compared with the Control group, the mRNA and protein levels of HDAC3 decreased in the IMQ group, but RGFP966 did not further reduce these expressions. HDAC3 was primarily located in the nucleus. Compared with the Control group, the nuclear HDAC3 content decreased in the skin tissues of the IMQ group, and RGFP966 further reduced nuclear HDAC3. Compared with the Control and IMQ groups, RGFP966 treatment decreased HDAC3 expression in splenic CD4⁺ and CD8⁺ T cells. RGFP966 treatment increased the expression of CCR6 and CCR8 in splenic CD4⁺ T cells and enhanced IL-17A secretion by peripheral blood and splenic CD4⁺ T lymphocytes. Additionally, compared with the IMQ group, RGFP966 reduced IL-10 protein levels and upregulated IL-17A expression in skin tissues. ConclusionRGFP966 exacerbates psoriatic-like inflammatory responses by inhibiting HDAC3, increasing the secretion of the cytokine IL-17A, and upregulating the expression of chemokines CCR8 and CCR6.

The current research status and development history of craniocerebral injury monitoring devices in the world were introduced.The working principles,technical characteristics and deficiencies of invasive and noninvasive craniocerebral injury monitoring devices were analyzed,including intracranial pressure monitor,electroencephalograph and near-infrared cerebral function imager.It's pointed out multimodal monitoring and big data analysis with artificial intelligence would be the trends of craniocerebral injury monitoring devices in the future.[Chinese Medical Equipment Journal,2024,45(1):108-114]

Inflammatory bowel disease (IBD) is characterized by chronic relapsing intestinal inflammation and encompasses ulcerative colitis (UC) and Crohn's disease (CD). IBD has emerged as a global healthcare problem. Clinically efficacious therapeutic agents are deficient. This study concentrates on models of ulcerative colitis with the objective of discovering novel therapeutic strategies. Previous investigations have established that schisandrin A demonstrates anti-inflammatory effects in vitro, concurrently enhancing the transcriptional activity of farnesoid X receptor (FXR). FXR inversely modulates the transcriptional activity of NF-κB, which has an important role in regulating inflammatory responses. Consequently, the current study was to explore the safeguarding influence of schisandrin A on ulcerative colitis and delineate the mechanism by which it regulates this effect through the FXR signaling pathway. The effect of schisandrin A on the mRNA levels of inflammatory factors was evaluated in RAW264.7 cells. The dual luciferase reporter gene assay was used to verify the relationship between schisandrin A and FXR targeting. The animal experiments were performed in accordance with the regulations of the Animal Ethics Committee of Shanghai University of Traditional Chinese Medicine (approval No. PZSHUTCM2304250005). Acute ulcerative colitis was induced in wild-type or FXR knockout C57BL/6 mice by drinking 3% dextran sodium sulfate (DSS) for 7 days, and schisandrin A was administered via gavage for a continuous treatment period of 7 days. The body weight and faecal were monitored daily. The mRNA levels of inflammatory factors in colon tissue and FXR target genes were measured by RT-qPCR. The findings revealed that schisandrin A, in vitro, impeded the lipopolysaccharide (LPS)-induced elevation in mRNA levels of inflammatory factors and schisandrin A could augment transcriptional activity of FXR. In wild-type mice, schisandrin A significantly improved weight loss, colon shortening, loose stools and blood in stools in mice with acute ulcerative colitis, and schisandrin A significantly reduced the expression of pro-inflammatory factors genes and significantly increased the expression of FXR target genes in colon tissues. In FXR knockout mice, the administration of schisandrin A failed to yield ameliorative effect on acute ulcerative colitis in mice. In conclusion, schisandrin A can reduce intestinal inflammation through the FXR signaling pathway to alleviate acute ulcerative colitis in mice. Implications arise that Schisandra lignans could serve as lead compounds for drug development aimed at inflammatory bowel disease.

Objective: To analyze the effects of outdoor activities, sedentary behaviors and sleep duration on the risk of poor vision among primary and secondary school students after replacing them with each other, so as to provide a reference for precise intervention in the prevention and control of myopia among children and adolescents. Methods: From March to May 2023, a stratified cluster random sampling method was used to select 6 132 students in grades 4 to 12 in Hefei, Wuhu, Suzhou and Chizhou cities in Anhui Province. A questionnaire survey was conducted to collect the basic information, outdoor activities, sedentary behavior, and sleep duration, and a visual inspection was carried out by 5 m standard logarithmic visual acuity chart. The single activity model, segmentation model and isotemporal substitution model were used to analyze the relationship between outdoor activities, sedentary behaviors, sleep, and poor vision, and stratified analysis was performed by gender. Results: The detection rate of poor vision among the 6 132 primary and secondary school students was 76.9%, and the detection rate of poor vision was higher for girls ( 81.1 %) than for boys (72.6%), and the difference was statistically significant ( χ 2=61.37, P <0.01). The results of the single activity model and segmentation model showed that outdoor activity and sleep duration were correlated with a reduced risk of poor vision in primary and secondary school students ( OR =0.87, 0.88; 0.88, 0.91), while sedentary behavior was correlated with an increased risk of poor vision ( OR =1.05, 1.03) ( P <0.05). The results of the isotemporal substitution model showed that replacing the same amount of sedentary behavior with 1 h/d of outdoor activity was associated with 15% reduction in the risk of poor vision ( OR = 0.85), and replacing the same amount of sedentary behavior with 1 h/d of sleep was associated with a 12% reduction in the risk of poor vision ( OR =0.88) ( P <0.05). The results of the isotemporal substitution model stratified by gender showed that replacing the same amount of sedentary behavior with 1 h/d of outdoor activity and 1 h/d of sleep were associated with 22% and 8% reduction in the risk of poor vision in male students ( OR =0.78, 0.92), and replacing the same amount of sedentary behavior with 1 h/d of sleep was associated with 18% reduction in the risk of poor vision in female students ( OR =0.82) ( P <0.05). Conclusion Replacing sedentary behavior with 1 h/d of outdoor activity for boys and 1 h/d of sleep for girls and boys could reduce the risk of poor vision.

Urodynamics is a critical field that studies the physiological and biomechanical parameters involved in urine production, storage, and voiding.This paper first reviews the development process of urodynamics, expounds the development and progress of urodynamic testing instruments from early basic research to modern advanced equipment and the history of their introduction into China, and then introduces in detail the principle of action, system composition and clinical application status of major urodynamic instruments, and further points out the technical shortcomings of current instruments, and then proposes improvement directions, including the core load sensor technology, comfort and privacy of urodynamic testing instruments, work data transfer and close integration with artificial intelligence, in order to provide a valuable reference for clinical understanding of the development of this field.

The main chemical components of Allii Macrostemonis Bulbus and components in serum were analyzed and identified rapidly and precisely by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry(UPLC-Q-TOF-MS)technique in this study.The compounds were identified based on the relative molecular mass,fragmentation ions,and retention time of chromatographic peaks.A total of 36 kinds of chemical components were identified from Allii Macrostemonis Bulbus,including 28 kinds of saponins,3 kinds of amino acids,2 kinds of flavonoids,one kind of organosulfur compound,one kind of nucleoside,and one kind of hormone-lipid compound.In addition,8 kinds of compounds of Allii Macrostemonis Bulbus were identified from the serum.Based on the intersection compounds of which detected in serum and screened out by TCMSP platform database,by using targeted network pharmacology and molecular docking technology,a"drug-component-target-pathway"association network was constructed.Naringenin,quercetin,macrostemonoside E and 25(R)-26-O-β-D-glucopyranosyl-22-hydroxy-5β-furostan-3-O-β-D-glucopyranosyl(1→2)-β-D-glucopyranoside were screened as the main active constituents of Allii Macrostemonis Bulbus in the treatment of hyperlipidemia.In addition,adenosine 5′-monophosphate-activated protein kinase(AMPK),tumor necrosis factor(TNF),vascular endothelial growth factor A(VEGFA)and matrix metallopeptidase 9(MMP9)were the key action targets for Allii Macrostemonis Bulbus in the treatment of hyperlipidemia.Molecular docking was performed using the main pharmacodynamic components and key action targets.The results indicated that all the four active components showed strongly bound to AMPK.This suggested that the regulation of lipid metabolism might be the key mechanism of Allii Macrostemonis Bulbus in antihyperlipidemic effect.This study provided a data reference for the research on the pharmacodynamic components of Allii Macrostemonis Bulbus,and provided a basis for the improvement of quality standard of Allii Macrostemonis Bulbus.

Objective To detect the level of related indexes of energy metabolism in liver tissue of alcoholic liver disease(ALD)mice,and to explore the intervention effect of Gehua Jiejiu Dizhi Decoction.Methods Forty male C57BL/6J mice were randomly divided into the normal control group,the model group,the Gehua Jiejiu Dizhi Decoction high-dose group(4.94 g/kg),the Gehua Jiejiu Dizhi Decoction low-dose group(2.47 g/kg),and the resveratrol group(0.40 g/kg),with 8 mice in each group.Except the normal control group,the mice in other groups were fed with Lieber-DeCarli control liquid diet for five days,followed by Lieber-DeCarli alcohol liquid diet for ten days,and on the 16th day,the mice were given 31.5%alcohol solution through gavage to establish the ALD model.From the second day after modeling,the rats in the intervention groups were given the corresponding drugs by gavage once a day for nine consecutive days.Hematoxylin and eosin staining and oil red O staining were used to observe the liver steatosis in liver tissue.The activities of Na+K+-ATPase and Ca2+Mg2+-ATPase,and the contents of succinate dehydrogenase(SDH)and hepatic glycogen in liver tissue were detected using spectrophotometry.The contents of ATP,ADP,AMP,the AMP/ATP value,total adenosine pool(TAN)content,and energy charge(EC)in liver tissue were detected by reversed phase high performance liquid chromatography method.The mRNA expressions of NAD dependent deacetylase Sirtuin-1(SIRT1)and AMP-activated protein kinase(AMPK)α2 in liver tissue were detected by real-time PCR.The protein expressions of SIRT1,AMPKα2,and AMPKβ1 in liver tissue were detected by Western blotting.Results Compared with the normal control group,the model group mice showed significant hepatic steatosis,significantly decreased Ca2+Mg2+-ATPase activity and SDH content in liver tissue,significantly increased hepatic glycogen content,significantly decreased EC and AMP/ATP value,significantly increased ATP,ADP,AMP,and TAN content,significantly decreased mRNA expressions of SIRT1 and AMPKα2,significantly increased protein expression of AMPKβ1(P<0.05).Compared with the model group,the Gehua Jiejiu Dizhi Decoction high-and low-dose groups significantly reduced liver tissue steatosis,and the activity of Na+K+-ATPase in liver tissue was significantly reduced,the EC and the mRNA expressions of SIRT1 and AMPKα2 were increased(P<0.05);the activity of Ca2+Mg2+-ATPase,SDH and ATP contents were increased in the Gehua Jiejiu Dizhi Decoction low-dose group(P<0.05);the AMP/ATP value was increased in the Gehua Jiejiu Dizhi Decoction high-dose group(P<0.05);and the protein expression of SIRT1 was increased in the the Gehua Jiejiu Dizhi Decoction high-and low-dose groups and the resveratrol group(P<0.05);the protein expression of AMPKα2 in the Gehua Jiejiu Dizhi Decoction low-dose group and the resveratrol group was increased(P<0.05).Compared with the Gehua Jiejiu Dizhi Decoction high-dose group,the Gehua Jiejiu Dizhi Decoction low-dose group and the resveratrol group showed a significant increase in ATP,TAN contents,and EC in liver tissue,while the AMP/ATP value decreased(P<0.05);mRNA expressionin of AMPKα2 in the Gehua Jiejiu Dizhi Decoction low-dose group was decreased(P<0.05);and the protein expressions of SIRT1 and AMPKα2 in the resveratrol group were increased(P<0.05).Compared with the Gehua Jiejiu Dizhi Decoction low-dose group,the protein expression of AMPKβ1 was decreased in the resveratrol group(P<0.05).Conclusion The changes of energy metabolism caused by chronic alcohol intake may be related to the occurrence of ALD,and the intervention of Gehua Jiejiu Dizhi Decoction can improve the abnormal energy metabolism in the liver of ALD mice.