[Objective] To investigate the infection status and characteristics of HEV among voluntary blood donors in Ningbo, and to provide a basis for improving the blood screening strategy. [Methods] A total of 12 227 blood samples from voluntary blood donors in Ningbo from June 2022 to May 2023 were tested for HEV serology, enzymology, and nucleic acid testing. Furthermore, HEV gene sequencing was performed for genotyping analysis, and donors with reactive nucleic acid testing results were followed up to confirm their infection status. [Results] The reactivity rate of HEV Ag, anti-HEV IgM and anti-HEV IgG was 0.098%, 0.899% and 29.198%, respectively. There was no difference in the reactivity of anti-HEV IgM and anti-HEV IgG between genders, donation frequencies and donation types (P>0.05). The reactivity rate increased significantly with age (P<0.05). The rate of ALT disqualification (ALT>50U/L) was significantly higher than that in non-reactive samples (P<0.05). The HEV Ag reactivity rate (0.098%) was not correlated with gender, donation frequency, donation type or age. One HEV RNA positive case was found, with a positive rate of 0.008%(1/12 227). It was confirmed to be hepatitis E virus genotype 3 by sequencing analysis. Apart from HEV Ag reactivity, all other blood safety screening items were non-reactive, suggesting this case might be in the acute infection phase. The follow-up results showed that all indicators of the donor's previous blood donation were non-reactive. [Conclusion] Pre-donation ALT detection can reduce the risk of transfusion-transmitted HEV (TT-HEV) to a certain extent, and the effective way to prevent TT-HEV is to detect HEV RNA and serology of donor blood.

Objective To evaluate the effectiveness of active screening in improving the detection rate of carbape-nem-resistant Enterobacterales(CRE)in the intensive care units(ICUs).Methods From July 2023 to June 2024,active screening of rectal swab CRE was conducted on ICU patients in 10 hospitals.ICU patients who underwent ac-tive screening from July 2023 to June 2024 were selected as the study group,while those who did not undergo active screening from July 2022 to June 2023 were selected as the control group.Difference in CRE detection rates between the two groups of patients was compared.Results A total of 7 803 ICU patients were included in the study group,744 CRE strains were detected,with a detection rate of 9.53％,out of which 304 CRE strains were detected through routine detection(detection rate 3.90％),3 707 patients underwent active screen,440 CRE strains were detected(detection rate 11.87％).7 561 ICU patients were included in the control group,out of which 250 CRE strains were detected through routine detection,with a detection rate of 3.31％.There was a statistically significant difference in the overall detection rate of CRE between two groups of patients(x2=246.18,P＜0.001).In the study group,CRE detection rate of active screening(11.87％)was higher than that of routine detection(3.90％),with statistically significant difference(x2=264.26,P＜0.001).A total of 17 CRE strains were detected from the study group.The proportions of Klebsiella pneumoniae(80.92％vs 73.41％)and Serratia marcescens(2.30％vs0.23％)in the routine detection group were both higher than in the active screening group,while the proportion of Escherichia coli in the routine detection group was lower(8.22％vs 19.55％),all with statistically significant differences(all P＜0.05).Conclusion The prevalence of CRE in ICUs is relatively high,with a wide range of bac-terial species.Active screening can improve the detection rate of CRE.

Objective To evaluate the effectiveness of active screening in improving the detection rate of carbape-nem-resistant Enterobacterales(CRE)in the intensive care units(ICUs).Methods From July 2023 to June 2024,active screening of rectal swab CRE was conducted on ICU patients in 10 hospitals.ICU patients who underwent ac-tive screening from July 2023 to June 2024 were selected as the study group,while those who did not undergo active screening from July 2022 to June 2023 were selected as the control group.Difference in CRE detection rates between the two groups of patients was compared.Results A total of 7 803 ICU patients were included in the study group,744 CRE strains were detected,with a detection rate of 9.53％,out of which 304 CRE strains were detected through routine detection(detection rate 3.90％),3 707 patients underwent active screen,440 CRE strains were detected(detection rate 11.87％).7 561 ICU patients were included in the control group,out of which 250 CRE strains were detected through routine detection,with a detection rate of 3.31％.There was a statistically significant difference in the overall detection rate of CRE between two groups of patients(x2=246.18,P＜0.001).In the study group,CRE detection rate of active screening(11.87％)was higher than that of routine detection(3.90％),with statistically significant difference(x2=264.26,P＜0.001).A total of 17 CRE strains were detected from the study group.The proportions of Klebsiella pneumoniae(80.92％vs 73.41％)and Serratia marcescens(2.30％vs0.23％)in the routine detection group were both higher than in the active screening group,while the proportion of Escherichia coli in the routine detection group was lower(8.22％vs 19.55％),all with statistically significant differences(all P＜0.05).Conclusion The prevalence of CRE in ICUs is relatively high,with a wide range of bac-terial species.Active screening can improve the detection rate of CRE.

Fibrosis， a tumor-like lesion between benign tissue and malignant tumor， mostly occurs in the liver， kidney， heart， lung， bone marrow and other organs and tissues. It can affect almost every organ and eventually induce multiple organ failure and cancers， seriously endangering human life. It will be of great importance to prevent cancer if the disease can be opportunely blocked in the fibrotic stage. The pathogenesis of fibrosis is still not completely clear. It is of great clinical significance to study the occurrence， development， and mechanism of fibrosis as well as to screen new therapeutic targets. Enhancer of zeste homolog 2 （EZH2） is mainly located in the nucleus and involved in the formation of the polycomb repressive complex 2. EZH2 is a methyltransferase which makes the lysine on position 27 of histone H3 （H3K27me3） undergo trimethyl modification induces gene silencing through classical or nonclassical actions， so as to inhibit or activate transcription. EZH2 plays a critical role in cell growth， proliferation， differentiation， and apoptosis， which is regulated by different targets and signaling pathways. EZH2 regulates the transformation of myofibroblasts and participates in the fibrosis of multiple organs. Recent studies have shown that EZH2 plays a role in fibrosis-related pathophysiological processes such as epithelial-mesenchymal transition， oxidative stress， and inflammation. EZH2 as the target of fibrosis， EZH2 inhibitors， and EZH2-related traditional Chinese medicine （TCM） formula and active compounds have gradually become hot research directions. EZH2 may be a powerful target for organ fibrosis. Exploring the structure， function， and distribution of EZH2， the role of EZH2 in fibrosis， the EZH2 inhibitors， and TCM formulas and active components targeting EZH2 has great meanings. This paper reviews the research progress in EZH2 and fibrosis， providing new ideas for the diagnosis， treatment， and drug development of fibrosis.

Ligand-gated ion channels are a large category of essential ion channels,modulating their state by binding to specific ligands to allow ions to pass through the cell membrane.Purinergic ligand-gated ion channel receptors(P2XRs)and acid-sensitive ion channels(ASICs)are representative members of trimeric ligand-gated ion channel.Recent studies have shown that structural differences in the intracellular domain of P2XRs may determine the desensitization process.The lateral fenestrations of P2XRs potentially serve as a pathway for ion conductance and play a decisive role in ion selectivity.Phosphorylation of numerous amino acid residues in the P2XRs are involved in regulating the activity of ion channels.Additionally,the P2XRs interact with other ligand-gated ion channels including N-methyl-D-aspartate receptors,γ-aminobutyric acid receptors,5-hydroxytryptamin receptors and nicotinic acetylcholine receptors,mediating physiological processes such as synaptic plasticity.Conformational changes in the intracellular domain of the ASICs expose binding sites of intracellular signal partners,facilitating metabolic signal transduction.Amino acids such as Val16,Ser17,Ile18,Gln19 and Ala20 in the ASICs participate in channel opening and membrane expression.ASICs can also bind to intracellular proteins,such as CIPP and p11,to regulate channel function.Many phosphorylation sites at the C-terminus and N-terminus of ASICs are involved in the regulation of receptors.Furthermore,ASICs are involved in various physiological and pathophysiological processes,which include pain,ischemic stroke,psychiatric disorders,and neurodegenerative disease.In this article,we review the roles of the intracellular domains of these trimeric ligand-gated ion channels in channel gating as well as their physiological and pathological functions,in order to provide new insights into the discovery of related drugs.

Objective In this study,the diversity of the TCR β chain CDR3 in peripheral blood of patients with different typical Traditional Chinese Medicine(TCM)syndromes of liver cirrhosis was analyzed by immune repertoire sequencing,the material basis and regularity of the syndromes of liver cirrhosis was discussed.Methods 20 patients with cirrhosis,including liver and gallbladder damp heat(LGHD),liver depression and spleen deficiency(LDSD),and liver and kidney yin deficiency(LKYD)were enrolled into case group,and 10 healthy patients were used as the healthy control group.DNA was extracted from peripheral blood samples,and multiplex PCR amplification of TCR β chain CDR3 was performed,followed by high-throughput sequencing of the products to analyze the diversity of the TCR β chain CDR3.Results The nt sequence numbers unique to CDR3 and aa sequence numbers unique to CDR3 of LDSD between liver cirrhosis syndromes were less than LKYD(P<0.05).Clonality,Pielous,Shannon.Index and DE50 of LGHD and LKYD had significant differences(P<0.05)between two groups,as well as the frequency of multiple fragments in V and J regions and V-J gene recombination of LGHD vs.LDSD,LGHD vs.LKYD,and LKYD vs.LDSD,respectively(P<0.05).LGHD vs.LDSD,TRBV21-1,TRBV12-4,TRBV11-1 subtype and 7 pairs of V-J recombination have statistical differences(P<0.05).LGHD vs.LKYD,TRBV10-2,TRBV7-6,TRBV5-8 subtypes and 30 pairs of V-J recombination were statistically different(P<0.05).LDSD vs.LKYD,there were statistical differences between TRBJ1-5 subtype and 18 pairs of V-J recombination(P<0.05).Conclusions The present study was conducted to find that the diversity of TCR CDR3 in liver cirrhosis syndrome is significantly different and conforms to the regularity of syndrome from excess to deficiency by explore the immunological characteristics of different TCM syndromes of liver cirrhosis,and to provide new support for the objective basis of"combination of disease and TCM syndrome"and"diagnosis and treatment".We explored the different expression patterns and specificity of adaptive immune gene rearrangement in patients with different TCM syndromes to identify different expression patterns and specific markers of adaptive immune gene rearrangements of typical TCM syndromes in liver cirrhosis.

Objective To elucidate the biological basis of liver-gallbladder damp-heat syndrome(LGDHS)within the framework of traditional Chinese medicine(TCM)as a complementary diagnostic and therapeutic approach in chronic hepatitis B(CHB).Methods CHB patients and healthy volunteers were enrolled from Shuguang Hospital Affili-ated to Shanghai University of Traditional Chinese Medicine between August 21,2018 and December 31,2020.They were divided into three groups:healthy group,LGDHS group,and latent syndrome(LP)group.Proteomic analysis using isobaric tags for relative and absolute quantitation(iTRAQ)was performed to identify differentially expressed proteins(DEPs).Metabolomic profiling via ultra-performance liquid chromatography-tandem mass spec-trometry(UPLC-MS/MS)was applied to serum samples to detect differentially regulated metabolites(DMs).Kyoto Encyclopedia of Genes and Genomes(KEGG)and Gene Ontology(GO)enrichment were employed to explore dysregulated pathways.Principal component analysis(PCA)and orthogonal partial least squares discriminant analysis(OPLS-DA)were utilized to visualize group separation and identify key metabolites and proteins contributing to LGDHS differentiation.Receiver operating characteristic(ROC)curve analysis evaluated the diagnostic performance of key biomarkers,while logistic regression models assessed their predictive accuracy.P values were corrected for multiple tests using the Benjamini-Hochberg method to control the false discovery rate(FDR).Validation of potential biomarkers was con-ducted using independent microarray data and real-time quantitative polymerase chain reac-tion(RT-qPCR).Results A total of 150 participants were enrolled,including healthy group(n=45),LGDHS group(n=60),and LP group(n=45).254 DEPs from proteomics data and 72 DMs from metabolomic profiling were identified by PCA and OPLS-DA.DEPs were mainly enriched in immune and complement pathways,while DMs involved in amino acid and energy metabolism.The integrated analysis identified seven key biomarkers:α1-acid glycoprotein(ORM1),asparagine synthetase(ASNS),solute carrier family 27 member 5(SLC27A5),glu-cosidase Ⅱ alpha subunit(GANAB),hexokinase 2(HK2),5-methyltetrahydrofolate-homocys-teine methyltransferase(MTR),and maltase-glucoamylase(MGAM).Microarray validation confirmed the diagnostic potential of these genes,with area under the curve(AUC)values for ROC analysis ranging from 0.536 to 0.759.Among these,ORM1,ASNS,and SLC27A5 showed significant differential ability in differentiating LGDHS patients(P=0.016,P=0.035,and P<0.001,respectively),with corresponding AUC of 0.749,0.743,and 0.759,respectively.A logis-tic regression model incorporating these three genes demonstrated an AUC of 0.939,indicat-ing a high discriminatory power for LGDHS.RT-qPCR further validated the differential ex-pression of ORM1 and SLC27A5 between LGDHS and LP groups(P=0.011 and P=0.034,re-spectively),with ASNS showing a consistent trend in expression(P=0.928).Conclusion This study integrates multi-omics approaches to uncover the molecular mecha-nisms underlying LGDHS in CHB.The identification of biomarkers ORM1,ASNS,and SLC27A5 offers a solid basis for the objective diagnosis of LGDHS,contributing to the stan-dardization and modernization of TCM diagnostic practices.

Objective:To analyze the difference of clinical characteristics and outcomes of infants with moderate and severe pediatric acute respiratory distress syndrome(PARDS)diagnosed according to baseline oxygenation index(OI) in pediatric intensive care unit(PICU).Methods:Second analysis of the data collected from the "Efficacy of pulmonary surfactant (PS) in the treatment of children with moderate and severe ARDS" program.Retrospectively compare of the differences in clinical data such as general condition, underlying diseases, OI, mechanical ventilation, PS administration and outcomes among infants with moderate and severe PARDS divided by baseline OI who admitted to PICUs at 14 participating tertiary hospitals from 2016 to December 2021.Results:Among the 101 cases, 55 cases (54.5%) were moderate and 46 cases (45.5%) were severe PARDS.The proportion of male in the severe group (50.0% vs.72.7%, P=0.019) and the pediatric critical illness score(PCIS)[72 (68, 78) vs.76 (70, 80), P=0.019] were significantly lower than those in the moderate group, while there was no significant difference regarding age, body weight, etiology of PARDS and underlying diseases.The utilization rate of high-frequency ventilator in the severe group was significantly higher than that in the moderate group (34.8% vs.10.9%, P=0.004), but there was no significant difference in PS use, fluid load and pulmonary complications.The 24 h OI improvement (0.26±0.33 vs.0.04±0.34, P=0.001) and the 72 h OI improvement[0.34 (-0.04, 0.62) vs.0.15 (-0.14, 0.42), P=0.029)]in the severe group were significantly better than those in the moderate group, but there was no significant difference regarding mortality, length of hospital stay and intubation duration after diagnosis of PARDS between the two groups. Conclusion:In moderate and severe(divided by baseline OI) PARDS infants with invasive mechanical ventilation, children in severe group have better oxygenation improvement in the early stage after PARDS identified and are more likely to receive high frequency ventilation compared to those in moderate group.Baseline OI can not sensitively distinguish the outcomes and is not an ideal index for PARDS grading of this kind of patient.

Purpose: We aimed to evaluate whether the addition of pemetrexed is effective in improving progression-free survival (PFS) in epidermal growth factor receptor (EGFR)–mutated patients with or without concomitant alterations. Materials and Methods: This multicenter clinical trial was conducted in China from June 15, 2018, to May 31, 2019. A total of 92 non–small cell lung cancer (NSCLC) patients harboring EGFR-sensitive mutations were included and divided into concomitant and non-concomitant groups. Patients in each group were randomly treated with EGFR–tyrosine kinase inhibitor (TKI) monotherapy or EGFR-TKI combined with pemetrexed in a ratio of 1:1. PFS was recorded as the primary endpoint. Results: The overall median PFS of this cohort was 10.1 months. There were no significant differences in PFS between patients with and without concomitant and between patients received TKI monotherapy and TKI combined with pemetrexed (p=0.210 and p=0.085, respectively). Stratification analysis indicated that patients received TKI monotherapy had a significantly longer PFS in non-concomitant group than that in concomitant group (p=0.002). In concomitant group, patients received TKI combined with pemetrexed had a significantly longer PFS than patients received TKI monotherapy (p=0.013). Molecular dynamic analysis showed rapidly emerging EGFR T790M in patients received TKI monotherapy. EGFR mutation abundance decreased in patients received TKI combined chemotherapy, which supports better efficacy for a TKI combined chemotherapy as compared to TKI monotherapy. A good correlation between therapeutic efficacy and a change in circulating tumor DNA (ctDNA) status was found in 66% of patients, supporting the guiding role of ctDNA minimal residual disease (MRD) in NSCLC treatment. Conclusion EGFR-TKI monotherapy is applicable to EGFR-sensitive patients without concomitant alterations, while a TKI combined chemotherapy is applicable to EGFR-sensitive patients with concomitant alterations. CtDNA MRD may be a potential biomarker for predicting therapeutic efficacy.

OBJECTI VE To explore the effects of total flavonoids of Bidens polisa L.（TFB）on insulin resistance （IR）of HepG2 cells. METHODS B. polisa L. was refluxed and extracted with 80％ ethanol to obtain TFB. Palmitic acid was used to induce IR mode of HepG 2 cells in vitro . The effects of low-concentration ，medium-concentration and high-concentration （20，40， 80 mg/L） of TFB on the consumption of glucose were investigated. Using metformin as positive control ，the effects of low-concentration，medium-concentration and high-concentration （20，40，80 mg/L）of TFB on the protein expression of insulin receptor substrate- 1（IRS-1），c-Jun N-terminal kinase （JNK）and protein kinase C （PKC）were investigated. Molecular docking technology was used to explore the interaction between eight main active components of TFB such as quercetin ，quercitrin and IRS-1，JNK and PKC proteins. RESULTS The glucose consumption of TFB low-concentration ，medium-concentration and high-concentration groups were increased significantly （P＜0.05 or P＜0.01）. Compared with normal group ，the expression of IRS-1 and JNK protein in the model group decreased significantly ，and the expression of PKC protein increased significantly （P＜ 0.01）. Compared with model group ，the protein expression of IRS- 1 and JNK could up-regulated while the protein expression of PKC down-regulated in TFB low-concentration ，medium-concentration and high-concentration groups and metformin positive control group （P＜0.05 or P＜0.01）. The score of molecular docking energy between maritimetin in TFB and IRS- 1 protein was －7.9 kcal/mol（1 kcal＝4.816 kJ）. The scores of molecular docking energy of maritimetin ，rutin and JNK protein were －9.3 kcal/mol. The score of molecular docking energy between quercitrin and PKC protein was －4.9 kcal/mol. Interactions between components and proteins included forming hydrogen bonds ，hydrophobic bonds and so on. CONCLUSIONS TFB can significantly improve IR of HepG 2 cells，the mechanism of which may be related to the regulation of protein expression of IRS ，JNK and PKC. Maritimetin，rutin and quercitrin may be potential active ingredients for improving IR.