Astrocytes are a crucial type of glial cells in the central nervous system, not only maintaining brain homeostasis, but also actively participating in the transmission of information within the brain. Astrocytes have a complex structure that includes the soma, various levels of processes, and end-feet. With the advancement of genetically encoded calcium indicators and imaging technologies, researchers have discovered numerous localized and small calcium activities in the fine processes and end-feet. These calcium activities were termed as microdomain calcium activities, which significantly differ from the calcium activities in the soma and can influence the activity of local neurons, synapses, and blood vessels. This article elaborates the detection and analysis, characteristics, sources, and functions of microdomain calcium activities, and discusses the impact of aging and neurodegenerative diseases on these activities, aiming to enhance the understanding of the role of astrocytes in the brain and to provide new insights for the treatment of brain disorders.
Astrocytes/cytology* ; Humans ; Animals ; Calcium/metabolism* ; Calcium Signaling/physiology* ; Brain/physiology* ; Aging/physiology* ; Membrane Microdomains/physiology* ; Neurodegenerative Diseases/physiopathology*

OBJECTIVE: Several epidemiological observational studies have related particulate matter (PM) exposure to Inflammatory bowel disease (IBD), but many confounding factors make it difficult to draw causal links from observational studies. The objective of this study was to explore the causal association between PM _2.5 exposure, its absorbance, and IBD. METHODS: We assessed the association of PM _2.5 and PM _2.5 absorbance with the two primary forms of IBD (Crohn's disease [CD] and ulcerative colitis [UC]) using Mendelian randomization (MR) to explore the causal relationship. We conducted two-sample MR analyses with aggregated data from the UK Biobank genome-wide association study. Single-nucleotide polymorphisms linked with PM _2.5 concentrations or their absorbance were used as instrumental variables (IVs). We used inverse variance weighting (IVW) as the primary analytical approach and four other standard methods as supplementary analyses for quality control. RESULTS: The results of MR demonstrated that PM _2.5 had an adverse influence on UC risk (odds ratio [ OR] = 1.010; 95% confidence interval [ CI] = 1.001-1.019, P = 0.020). Meanwhile, the results of IVW showed that PM _2.5 absorbance was also causally associated with UC ( OR = 1.012; 95% CI = 1.004-1.019, P = 0.002). We observed no causal relationship between PM _2.5, PM _2.5 absorbance, and CD. The results of sensitivity analysis indicated the absence of heterogeneity or pleiotropy, ensuring the reliability of MR results. CONCLUSION Based on two-sample MR analyses, there are potential positive causal relationships between PM _2.5, PM _2.5 absorbance, and UC.
Humans ; Mendelian Randomization Analysis ; Particulate Matter/analysis* ; Polymorphism, Single Nucleotide ; Inflammatory Bowel Diseases/genetics* ; Air Pollutants/analysis* ; Crohn Disease/genetics* ; Colitis, Ulcerative/genetics* ; Genome-Wide Association Study ; Risk Factors ; Environmental Exposure

Objective To investigate the clinical effect of micro-debridement and positioning suture in the treatment of poor perineal wound healing after delivery.Methods 106 pregnant women who were eligible for poor healing of perineal wounds(deep skin and muscle defragmentation,involving muscle layer depth ≥1 cm)after vaginal delivery in Affiliated Hospital of Zunyi Medical University were selected as the research objects from June 2021 to October 2024.From June 2021 to December 2022,53 cases in control group were treated with traditional anticipation therapy 1:5000 potassium permanganate solution shallow sitz bath,and from January 2023 to October 2024,53 cases in experimental group were treated with micro-debridement positioning suture.After the operation,follow-up was established with the pregnant women to evaluate the healing cycle of perineal wound,the degree of wound pain 7 days after the operation,the wound healing situation and the cure rate 1 month after the operation.Results The healing period of perineal wound in experimental group was shorter than that in control group;The degree of wound pain in experimental group was lower than that in control group 7 days after operation;The wound healing of one month after operation in experimental group was higher than that in control group;The effective rate of experimental group was higher than that of control group,the differences were statistically significant(P＜0.05).Conclusion The use of micro-debridement and positioning suture in the treatment of poor perineal wound can shorten the healing period of perineal wound,reduce the degree of wound pain,the wound healing is good,and the treatment efficiency is good.

Body weight abnormalities, including overweight, obesity, and underweight, have become a dual public health challenge in Chinese adults: overweight and obesity lead to a variety of chronic complications, while underweight increases the risks of malnutrition, sarcopenia, and organ dysfunction. To systematically address these issues, multidisciplinary experts in endocrinology, sports science, nutrition, and psychiatry from various regions have held multiple weight management seminars. Based on the latest epidemiological data and clinical evidence, they expanded the guideline to include assessment and intervention strategies for underweight, in addition to the core content of obesity management. This guideline outlines the etiological mechanisms, evaluation methods, and multidimensional management strategies for overweight and obesity, covering key areas such as diagnosis and assessment, medical nutrition therapy, exercise prescription, pharmacological intervention, and psychological support. It is intended to provide a scientific and standardized approach to weight management across the adult population, aiming to curb the rising prevalence of obesity, mitigate complications associated with abnormal body weight, and improve nutritional status and overall quality of life.

Natural arabinogalactan， an important polysaccharide， has a wide range of sources， a complex structure， various biological activities， and great application potential. Natural arabinogalactan is mainly rich in plants and microorganisms， and its structure varies due to different sources， including types Ⅰ， type Ⅱ， type Ⅱ-related types， and new configurations. Natural arabinogalactan has shown a variety of biological activities， such as anti-tumor， anti-oxidation， anti-coagulation， anti-aging， blood glucose-lowering， intestinal health-maintaining， anti-inflammatory， and immunomodulatory activities. In addition， natural arabinogalactan shows good biocompatibility and low toxicity， serving as a potential material in the biomedical field. Natural arabinogalactan has been designed as a carrier in the drug delivery system to effectively improve drug stability and targeting. Natural arabinogalactan is often added to skin care products to help delay skin aging and enhance skin barrier function because of their moisturizing and antioxidant properties. Additionally， natural arabinogalactan acts as a thickener， stabilizer， and emulsifier to improve the texture and taste while enhancing the nutritional value of food products. The review of latest research reports is helpful to further understand the relationship between the structure， biological activity， and functional application of natural arabinogalactan and provides an important reference for future research and development.

Objective To explore the differences in clinical characteristics of sudden sensorineural hearing loss(SSNHL)between patients with coronavirus disease 2019(COVID-19)and those without-COVID-19.Methods 31 SSNHL patients with COVID-19 who were hospitalized in a department during the COVID-19 epidemic period(from December 2022 to January 2023)were included as the study group,and 12 SSNHL patients without COVID-19 who received treatment during the non-COVID-19 epidemic period(from December 2021 to January 2022)were co-llected as the control group.Two groups of patients received standardized treatment,and their clinical characteristics and prognosis were compared.Clinical characteristics of SSNHL patients with COVID-19 during the COVID-19 epidemic period were analyzed.Results The time interval from patients developed COVID-19 to the onset of SSNHL in the study group was 3-30 days.The time interval from onset to consultation were 3(1,7)days and 5(4,6)days in the study group and the control group,respectively,with no significant difference(P＞0.05).The average age of patients in the study group was(44.16±13.54)years,which was higher than that of the control group(35.23±9.24)years,and the difference was statistically significant(P＜0.05).The hearing at damaged fre-quency of the study group improved by 6.5(0.5,24.5)dB after therapy,which was lower than that of the control group(36.0[27.0,38.0]dB),with statistically significant difference(P＜0.05).There was a negative correlation of the interval of consultation with the average improvement level of hearing at damaged frequency(r=-0.318,P=0.033).The longer the interval,the less the hearing improvement and the worse the therapeutic effect.Corre-lation analysis was further conducted on the time interval from development of COVID-19 to SSNHL onset and the time interval of consultation in patients in the study group,which showed no correlation(r=-0.337,P=0.059).There was no statistically significant difference in the types and degree of SSNHL between two groups of patients(both P＞0.05).After standardized treatment,the rate of ineffective patients in the study group was 56.25％,which was higher than that in the control group(15.38％),and the difference was statistically significant(P＜0.05).Conclusion After adjusting the COVID-19 prevention and control policies,there are more hospitalized COVID-19 patients with SSNHL,with a higher proportion in patients of older age,with poorer efficacy,and inef-fective treatment.The earlier the treatment for SSNHL patients,the better the effect can achieve.COVID-19 may be a potential inducement and/or etiological factor of SSNHL,and further research is needed.

Objective To explore the differences in clinical characteristics of sudden sensorineural hearing loss(SSNHL)between patients with coronavirus disease 2019(COVID-19)and those without-COVID-19.Methods 31 SSNHL patients with COVID-19 who were hospitalized in a department during the COVID-19 epidemic period(from December 2022 to January 2023)were included as the study group,and 12 SSNHL patients without COVID-19 who received treatment during the non-COVID-19 epidemic period(from December 2021 to January 2022)were co-llected as the control group.Two groups of patients received standardized treatment,and their clinical characteristics and prognosis were compared.Clinical characteristics of SSNHL patients with COVID-19 during the COVID-19 epidemic period were analyzed.Results The time interval from patients developed COVID-19 to the onset of SSNHL in the study group was 3-30 days.The time interval from onset to consultation were 3(1,7)days and 5(4,6)days in the study group and the control group,respectively,with no significant difference(P＞0.05).The average age of patients in the study group was(44.16±13.54)years,which was higher than that of the control group(35.23±9.24)years,and the difference was statistically significant(P＜0.05).The hearing at damaged fre-quency of the study group improved by 6.5(0.5,24.5)dB after therapy,which was lower than that of the control group(36.0[27.0,38.0]dB),with statistically significant difference(P＜0.05).There was a negative correlation of the interval of consultation with the average improvement level of hearing at damaged frequency(r=-0.318,P=0.033).The longer the interval,the less the hearing improvement and the worse the therapeutic effect.Corre-lation analysis was further conducted on the time interval from development of COVID-19 to SSNHL onset and the time interval of consultation in patients in the study group,which showed no correlation(r=-0.337,P=0.059).There was no statistically significant difference in the types and degree of SSNHL between two groups of patients(both P＞0.05).After standardized treatment,the rate of ineffective patients in the study group was 56.25％,which was higher than that in the control group(15.38％),and the difference was statistically significant(P＜0.05).Conclusion After adjusting the COVID-19 prevention and control policies,there are more hospitalized COVID-19 patients with SSNHL,with a higher proportion in patients of older age,with poorer efficacy,and inef-fective treatment.The earlier the treatment for SSNHL patients,the better the effect can achieve.COVID-19 may be a potential inducement and/or etiological factor of SSNHL,and further research is needed.

Objective To investigate the clinical effect of micro-debridement and positioning suture in the treatment of poor perineal wound healing after delivery.Methods 106 pregnant women who were eligible for poor healing of perineal wounds(deep skin and muscle defragmentation,involving muscle layer depth ≥1 cm)after vaginal delivery in Affiliated Hospital of Zunyi Medical University were selected as the research objects from June 2021 to October 2024.From June 2021 to December 2022,53 cases in control group were treated with traditional anticipation therapy 1:5000 potassium permanganate solution shallow sitz bath,and from January 2023 to October 2024,53 cases in experimental group were treated with micro-debridement positioning suture.After the operation,follow-up was established with the pregnant women to evaluate the healing cycle of perineal wound,the degree of wound pain 7 days after the operation,the wound healing situation and the cure rate 1 month after the operation.Results The healing period of perineal wound in experimental group was shorter than that in control group;The degree of wound pain in experimental group was lower than that in control group 7 days after operation;The wound healing of one month after operation in experimental group was higher than that in control group;The effective rate of experimental group was higher than that of control group,the differences were statistically significant(P＜0.05).Conclusion The use of micro-debridement and positioning suture in the treatment of poor perineal wound can shorten the healing period of perineal wound,reduce the degree of wound pain,the wound healing is good,and the treatment efficiency is good.

Body weight abnormalities, including overweight, obesity, and underweight, have become a dual public health challenge in Chinese adults: overweight and obesity lead to a variety of chronic complications, while underweight increases the risks of malnutrition, sarcopenia, and organ dysfunction. To systematically address these issues, multidisciplinary experts in endocrinology, sports science, nutrition, and psychiatry from various regions have held multiple weight management seminars. Based on the latest epidemiological data and clinical evidence, they expanded the guideline to include assessment and intervention strategies for underweight, in addition to the core content of obesity management. This guideline outlines the etiological mechanisms, evaluation methods, and multidimensional management strategies for overweight and obesity, covering key areas such as diagnosis and assessment, medical nutrition therapy, exercise prescription, pharmacological intervention, and psychological support. It is intended to provide a scientific and standardized approach to weight management across the adult population, aiming to curb the rising prevalence of obesity, mitigate complications associated with abnormal body weight, and improve nutritional status and overall quality of life.

Objective To investigate the impact of overweight on the prognosis of patients with acute mild ischemic stroke or moderate-high risk transient ischemic attack (TIA). Methods A total of 366 patients with acute mild ischemic stroke or moderate-high risk TIA who carried CYP2C19 loss-of-function alleles were included in the study. Baseline data were collected at admission, and clinical outcomes were collected within 3 months post-onset (primary outcomes: stroke recurrences within 3 months post-onset; secondary outcomes: composite outcome of stroke recurrence or death within 3 months post-onset, vascular events, and quality of life within 3 months). Kaplan-Meier method was used to plot the cumulative incidence curve of outcomes. Multivariate Cox proportional hazards model and multivariate Logistic regression model were used to evaluate the relationship between overweight and clinical outcomes within 3 months post-onset in patientswith ischemic stroke or TIA. The integrated discrimination improvement index (IDI) and net reclassification improvement index (NRI) were calculated to assess the predictive value of adding body mass index (BMI, whether overweight or not) based on traditional models for predicting the prognosis of acute ischemic stroke or TIA. Results After 3 months of follow-up, 28 patients had stroke recurrence, 1 patient died, and 31 patients had vascular events. The Kaplan-Meier cumulative incidence curve showed that the cumulative incidences of stroke recurrence, stroke recurrence or death, and vascular events after 3 months of onset were lower in overweight patients compared with non-overweight patients (Log-rank P < 0.05). Multivariate analysis showed that compared with non-overweight patients, overweight patients had significantly reduced risks of stroke recurrence within 3 months (HR=0.24; 95%CI, 0.08 to 0.71), composite outcome of stroke recurrence or death (HR=0.24; 95%CI, 0.08 to 0.69), and vascular events (HR=0.22; 95%CI, 0.07 to 0.63), and significantly improved quality of life within 3 months (OR=0.39; 95%CI, 0.20 to 0.76). The IDI and NRI calculations showed that compared with traditional models, the new model adding BMI (whether overweight) had significantly improved predictive ability for the prognosis of acute ischemic stroke or TIA. Conclusion Overweight may be a protective factor for the prognosis of TIA patients with acute mild ischemic stroke or moderate-high risk who carry CYP2C19 loss-of-function alleles. Compared with non-overweight patients, overweight patients have reduced risks of stroke recurrence, composite outcome of stroke recurrence or death, and vascular events within 3 months post-onset, and improved quality of life within 3 months post-onset.