Objective: To investigate the differences and diversity changes in gut microbiota between children and adolescents with constipation and diarrhea, and healthy individuals, and to explore the correlation between changes in stool consistency and gut microbiota, in order to provide a scientific reference for the research on intestinal microecology among children and adolescents. Methods: From October 2021 to March 2022, a total of 42 children and adolescents with constipation and 37 with diarrhea from a tertiary hospital in Hangzhou City, and 43 healthy individuals from 3 primary and secondary schools were included in this study. Fecal samples of children and adolescents were collected and then stool genomic DNA was extracted for 16S rRNA gene high throughput sequencing, and the sequencing results were analyzed. In the analysis of alpha diversity, the Kruskal-Wallis rank sum test was used to compare the differences between the three groups, and the FDR multiple testing correction was used for pairwise comparisons. In the analysis of beta diversity, the Adonis test was used to compare the overall differences between the three groups, and the ANOSIM test was used for pairwise comparisons. In the LEfSe analysis, the LDA scores obtained through LDA analysis (linear regression analysis). Results: Alpha diversity analysis showed that there were statistically significant differences in the Shannon index (4.01, 3.81, 4.19) and Simpson index (0.05, 0.06, 0.04) between the diarrhea group, constipation group, and healthy group ( H=6.05, 6.35, P <0.1). Further pairwise comparison showed that the Shannon index and Simpson index of the healthy group were higher than those of the constipation group ( P <0.1). Beta diversity analysis showed that the impact of grouping factors on inter group differences was statistically significant ( R 2=0.045, P <0.1). Community composition analysis showed that there were 234 species in total among the three groups, and 36 unique species in the healthy group, 36 species in the diarrhea group, and 48 species in the constipation group. Species difference analysis showed significant differences in species composition at the genus level among the three groups ( H=0.000 05, 0.000 16, 0.000 20, 0.000 21, 0.000 53, 0.001 39, P <0.1), including Lachnospiraceae of Firmicutes phylum, Eubacterium hallii, Veillonellaceae, Qscillospiraceae, Butyricicoccaceae and Staphylococcaceae, respectively. KEGG abundance statistics and COG functional analysis showed that there were no significant differences in gene expression abundance of the same function among the three groups ( P >0.1). Conclusions The different stool consistency of children and adolescents is related to changes in gut microbiota composition. Compared to the healthy group, children with constipation or diarrhea have disrupted gut microbiota balance, with a shift in dominant bacteria and a higher abundance of opportunistic pathogens.

Gold nanoparticles(AuNPs)present unique physicochemical characteristics,excellent biocom-patibility and ease of surface functionalization,which have become the research hotspots in the field of biosens-ing.This article reviews the synthesis methods,main properties and surface functionalization of AuNPs,as well as the research progress of application in various sensing platforms.

Aim To develop and validate a dynamic nomogram to predict the risk of no-reflow phenomenon(NRP)after percutaneous coronary intervention(PCI)in patients with ST-segment elevation myocardial infarction(STE-MI)by constructing HALP based on haemoglobin(Hb),albumin(Alb),lymphocytes(LYM),and platelets(PLT).Methods A retrospective analysis of 449 STEMI patients admitted to Nanyang Central Hospital from January 2022 to Janu-ary 2024 was divided into 145 cases in the NRP group and 304 cases in the normal reflow group according to whether the patients developed NRP after surgery.HALP was calculated based on Hb,Alb,LYM and PLT observations.Independ-ent influences on NRP risk were determined by multivariate Logistic regression analysis.Dynamic nomogram of NRP risk after PCI in STEMI patients were developed using the R language correlation software package.Results The incidence of NRP was 32.3％(145/449)among 449 patients with NRP.The HALP of patients in the NRP group was lower than that of patients in the normal reflow group(P＜0.05).The area under the curve(AUC)of HALP for diagno-sis of NRP was 0.880(0.847-0.909),and the Kappa coefficient of its optimal cutoff value ≤3.04 versus patients with accurate diagnosis of NRP was 0.612.The results of multivariate Logistic regression analysis showed that age,diabetes mellitus,and high sensitivity C-reactive protein(hs-CRP)were independent risk factors for NRP after PCI in STEMI pa-tients(P＜0.05),and left ventricular ejection fraction(LVEF)and HALP were independent protective factors(P＜0.05).A dynamic nomogram(https://xz0311.shinyapps.io/DynNamicNRP/)based on HALP combined with age,di-abetes,LVEF,and hs-CRP was effective in predicting the risk of post-PCI NRP in STEM1 patients.Conclusion HALP is more effective than traditional risk factors in predicting NRP risk in STEMI patients after PCI,and the dynamic nomogram developed based on HALP will help develop personalized treatment strategies for patients with high NRP risk.

OBJECTIVE: To investigate the effect of folic acid coated-crosslinked urethane-doped polyester elastomer (fCUPE) nerve conduit in repairing long distance peripheral nerve injury. METHODS: Thirty-six 3-month-old male Sprague Dawley rats weighing 180-220 g were randomly assigned to 3 groups, each consisting of 12 rats: CUPE nerve conduit transplantation group (group A), fCUPE nerve conduit transplantation group (group B), and autologous nerve transplantation group (group C), the contralateral healthy limb of group C served as the control group (group D). A 20-mm-long sciatic nerve defect model was established in rats, and corresponding materials were used to repair the nerve defect according to the group. The sciatic function index (SFI) of groups A-C was calculated using the Bain formula at 1, 2, and 3 months after operation. The nerve conduction velocity (NCV) of the affected side in groups A-D was assessed using neuroelectrophysiological techniques. At 3 months after operation, the regenerated nerve tissue was collected from groups A-C for S-100 immunohistochemical staining and Schwann cell count in groups A and B to compare the level of nerve repair and regeneration in each group. RESULTS: At 3 months after operation, the nerve conduits in all groups partially degraded. There was no significant adhesion between the nerve and the conduit and the surrounding tissues, the conduit was well connected with the distal and proximal nerves, and the nerve-like tissues in the conduit could be observed when the nerve conduit stents were cut off. SFI in group A was significantly higher than that in group C at each time point after operation and was significantly higher than that in group B at 2 and 3 months after operation ( P<0.05). There was no significant difference in SFI between groups B and C at each time point after operation ( P>0.05). NCV in group A was significantly slower than that in the other 3 groups at each time point after operation ( P<0.05). The NCV of groups B and C were slower than that of group D, but the difference was significant only at 1 month after operation ( P<0.05). There was no significant difference between groups B and C at each time point after operation ( P>0.05). Immunohistochemical staining showed that the nerve tissue of group A had an abnormal cavo-like structure, light tissue staining, and many non-Schwann cells. In group B, a large quantity of normal neural structures was observed, the staining was deeper than that in group A, and the distribution of dedifferentiated Schwann cells was obvious. In group C, the nerve bundles were arranged neatly, and the tissue staining was the deepest. The number of Schwann cells in group B was (727.50±57.60) cells/mm ², which was significantly more than that in group A [(298.33±153.12) cells/mm ²] ( t=6.139, P<0.001). CONCLUSION The fCUPE nerve conduit is effective in repairing long-distance sciatic nerve defects and is comparable to autologous nerve grafts. It has the potential to be used as a substitute material for peripheral nerve defect transplantation.
Rats ; Animals ; Male ; Rats, Sprague-Dawley ; Polyesters ; Peripheral Nerve Injuries/surgery* ; Elastomers ; Urethane ; Sciatic Nerve/injuries* ; Carbamates ; Nerve Tissue ; Nerve Regeneration/physiology*

Rheumatoid arthritis (RA) is a chronic inflammatory autoimmune disease caused by inflammatory cells. Various inflammatory cells involved in RA include fibroblast-like synoviocytes, macrophages, CD4⁺T-lymphocytes, B lymphocytes, osteoclasts and chondrocytes. The close interaction between various inflammatory cells leads to imbalance of immune response and disorder of the expression of mRNA in inflammatory cells. It helps to drive production of pro-inflammatory cytokines and stimulate specific antigen-specific T- and B-lymphocytes to produce autoantibodies which is an important pathogenic factor for RA. Competing endogenous RNA (ceRNA) can regulate the expression of mRNA by competitively binding to miRNA. The related ceRNA network is a new regulatory mechanism for RNA interaction. It has been found to be involved in the regulation of abnormal biological processes such as proliferation, apoptosis, invasion and release of inflammatory factors of RA inflammatory cells. Understanding the ceRNA network in 6 kinds of RA common inflammatory cells provides a new idea for further elucidating the pathogenesis of RA, and provides a theoretical basis for the discovery of new biomarkers and effective therapeutic targets.
Humans ; Arthritis, Rheumatoid/genetics* ; MicroRNAs/metabolism* ; Synoviocytes/pathology* ; Cytokines/metabolism* ; RNA, Messenger/metabolism* ; Fibroblasts/pathology* ; Cell Proliferation

Objective To explore the value of preoperative LAR combined with AFP in evaluating the prognosis of patients with HCC. Methods We retrospectively analyzed the clinical data of 106 patients with HCC. Kaplan-Meier method was used to draw the survival curve. Univariate analysis was used to analyze possible variables affecting LAR. Cox risk regression model was used to evaluate the clinical value of preoperative LAR and AFP on the prognosis of HCC patients. Results The DFS and OS of the high LAR group and the high AFP group were shorter than those of the low LAR group and the low AFP group (P < 0.05). LAR≥4.58, AFP≥400μg/L and T3-T4 were independent risk factors affecting DFS and OS of HCC patients (P < 0.05). Postoperative interventional surgery was an independent factor influencing OS prolongation (P < 0.05). The DFS and OS were the shortest in the high LAR and high AFP group, and the DFS and OS were the longest in the low LAR and low AFP group (P < 0.05). Conclusion Preoperative LAR and AFP are independent poor prognostic factors of HCC. Preoperative LAR combined with AFP has a certain value in judging the prognosis of HCC patients.

Objective:To explore the predictive factors for efficacy of vagus nerve stimulation (VNS) in drug resistant epilepsy (DRE).Methods:A total of 91 DRE patients underwent VNS in our hospital from July 2015 to August 2019 were chosen in our study. The preoperative evaluation data and postoperative follow-up data were retrospectively analyzed. Univariate Logistic regression analysis and multivariate Logistic regression analysis were used to investigate the predictive factors for efficacy of VNS.Results:One year after VNS, McHugh grading I in 20 patients (22%), grading II in 37 (40.6%), grading III in 23 (25.3%), grading IV in 2 (2.2%), and grading V in 9 (9.9%)were noted. There were 57 patients (62.6%) reached the responder status (seizure frequency reduction≥50%, McHugh grading Ⅰ or Ⅱ), and 34 (37.4%) patients failed to reach the responder status (seizure frequency reduction<50%, McHugh grading Ⅲ-Ⅴ). The univariate Logistic regression analysis showed that the differences in lateralized interictal epileptiform discharge (IED), focal onset, and age of patients accepted electrode implantation were significant between the two groups ( P<0.05). Multivariate Logistic regression analysis demonstrated that the lateralized IDE ( OR=5.214, 95%CI: 1.331-20.431, P=0.018) and focal onset ( OR=4.111, 95%CI: 1.432-11.802, P=0.009) were the independent predictive factors for efficacy of VNS. Conclusion:The lateralized IDE and focal onset can be used as important references for VNS in DRE patients.

Successful pregnancy in placental mammals substantially depends on the establishment of maternal immune tolerance to the semi-allogenic fetus.Disorders in this process are tightly asso-ciated with adverse pregnancy outcomes including recurrent miscarriage (RM).However,an in-depth understanding of the systematic and decidual immune environment in RM remains largely lacking.In this study,we utilized single-cell RNA-sequencing (scRNA-seq) to comparably analyze the cellular and molecular signatures of decidual and peripheral leukocytes in normal and unex-plained RM pregnancies at the early stage of gestation.Integrative analysis identifies 22 distinct cell clusters in total,and a dramatic difference in leukocyte subsets and molecular properties in RM cases is revealed.Specifically,the cytotoxic properties of CD8+ effector T cells,nature killer(NK),and mucosal-associated invariant T (MAIT) cells in peripheral blood indicates apparently enhanced pro-inflammatory status,and the population proportions and ligand-receptor interac-tions of the decidual leukocyte subsets demonstrate preferential immune activation in RM patients.The molecular features,spatial distribution,and the developmental trajectories of five decidual NK(dNK) subsets have been elaborately illustrated.In RM patients,a dNK subset that supports embryonic growth is diminished in proportion,while the ratio of another dNK subset with cyto-toxic and immune-active signature is significantly increased.Notably,a unique pro-inflammatory CD56 + CD16 + dNK subset substantially accumulates in RM decidua.These findings reveal a com-prehensive cellular and molecular atlas of decidual and peripheral leukocytes in human early pregnancy and provide an in-depth insight into the immune pathogenesis for early pregnancy loss.

Objective:To analyze the compliance and related factors of low-dose computed tomography (LDCT) screening among the high-risk population of lung cancer in three provinces participating in the cancer early diagnosis and early treatment program in urban areas of China.Methods:From October 2017 to October 2018, 17 983 people aged between 40 and 74 years old at high risk of lung cancer were recruited from Zhejiang, Anhui and Liaoning provinces. The basic demographic characteristics, living habits, history of the disease and family history of cancer were collected by using a cancer risk assessment questionnaire, and the data of participants examined by LDCT were obtained from the hospitals participating in the program. The screening compliance was quantified by the screening participation rate, and it was calculated as the proportion of participants completing LDCT scan among high-risk population. The related factors of LDCT screening compliance were analyzed by using a multivariate logistic regression model.Results:The age of 17 983 participants was (56.52±8.22) years old. Males accounted for 51.9% (N=9 332), and 69.5% (N=12 495) had ever smoked, including former smokers and current smokers. A total of 6 269 participants were screened by LDCT, and the screening participation rate was 34.86%. The results of multivariate logistic regression analysis showed that the age group of 50 to 69 years old, female, passive smokers, alcohol consumption, family history of lung cancer and history of chronic respiratory diseases were more likely to be screened by LDCT, while the compliance of LDCT screening in current smokers was low.Conclusions:The LDCT screening compliance of the high-risk population of lung cancer in urban areas of China still needs to be improved. Age, sex, smoking, drinking, family history of lung cancer and history of chronic respiratory disease are associated with screening compliance.

Objective:To analyze the compliance and related factors of low-dose computed tomography (LDCT) screening among the high-risk population of lung cancer in three provinces participating in the cancer early diagnosis and early treatment program in urban areas of China.Methods:From October 2017 to October 2018, 17 983 people aged between 40 and 74 years old at high risk of lung cancer were recruited from Zhejiang, Anhui and Liaoning provinces. The basic demographic characteristics, living habits, history of the disease and family history of cancer were collected by using a cancer risk assessment questionnaire, and the data of participants examined by LDCT were obtained from the hospitals participating in the program. The screening compliance was quantified by the screening participation rate, and it was calculated as the proportion of participants completing LDCT scan among high-risk population. The related factors of LDCT screening compliance were analyzed by using a multivariate logistic regression model.Results:The age of 17 983 participants was (56.52±8.22) years old. Males accounted for 51.9% (N=9 332), and 69.5% (N=12 495) had ever smoked, including former smokers and current smokers. A total of 6 269 participants were screened by LDCT, and the screening participation rate was 34.86%. The results of multivariate logistic regression analysis showed that the age group of 50 to 69 years old, female, passive smokers, alcohol consumption, family history of lung cancer and history of chronic respiratory diseases were more likely to be screened by LDCT, while the compliance of LDCT screening in current smokers was low.Conclusions:The LDCT screening compliance of the high-risk population of lung cancer in urban areas of China still needs to be improved. Age, sex, smoking, drinking, family history of lung cancer and history of chronic respiratory disease are associated with screening compliance.