To investigate the awareness of cognitive impairment disorders among residents of the Xizang Autonomous Region and its influencing factors, thereby providing a basis for targeted prevention and treatment efforts.

Background and purpose:Patients with prostate cancer(PCa)have consistently shown suboptimal responses to immunotherapy,which may be closely related to the immunosuppressive state of the PCa tumor microenvironment.MYC,a key transcription factor in cancer cells,is involved in cell proliferation,differentiation,apoptosis and immune surveillance by regulating the expression of intracellular genes.This study aimed to elucidate the mechanisms through which MYC fosters an immunosuppressive state within the PCa tumor microenvironment and to delineate its functional impact on PCa cells.Methods:We performed clustering and annotation of single-cell RNA sequencing(scRNA-seq)data from PCa,and conducted subcluster analyses for tumor cells,T cells,and macrophages respectively.The expression changes of MYC and CD47 across tumor subtype were analyzed,and the expression variations of signal regulatory protein alpha(SIRPα)among macrophage subtype were assessed.Furthermore,we divided the PCa transcriptomic dataset samples into high-and low-MYC expression groups based on MYC expression levels,and performed differential expression analysis and enrichment analysis for each group.The functional role of MYC in PCa cells was validated using chromatin immunoprecipitation-quantitative polymerase chain reaction(ChIP-qPCR)and experimental analyses.Furthermore,animal experiments(reviewed and approved by the ethics committee of the First Affiliated Hospital of Henan University of Science and Technology,approval number:D-2025-B015)were conducted to further validate the relationship between MYC and CD47.Finally,we analyzed and validated the whey acidic protein four-disulfide core domain 2(WFDC2)+tumor subtype using transcriptomic data from PCa.Results:Through the analysis of scRNA-seq data from PCa,a total of 32,977 cells were identified,and 7 distinct cell types were annotated.The tumor cells were further divided into 10 tumor cell subtypes,among which the WFDC2+tumor cell subtype exhibited more intensive cellular communication with CD8+T cells and macrophages within the PCa tumor microenvironment.MYC and CD47 exhibited high expression levels during the middle-to-late stages of differentiation in PCa cells,whereas SIRPα maintained high expression throughout the macrophage differentiation trajectory.Enrichment analysis revealed that the WFDC2+tumor cell subtype was primarily enriched in signaling pathways such as transforming growth factor-β(TGF-β)and Wnt/β-catenin.ChIP-qPCR confirmed the regulatory relationship between MYC and CD47 expression.Additionally,it was found that MYC knockdown significantly inhibited the proliferation and invasion abilities of PCa cells,while overexpression of CD47 could reverse this effect.Animal experiment results confirmed an positive correlation between MYC and CD47 protein expression.Furthermore,Tumor Immune Dysfunction and Exclusion(TIDE)and Estimate analyses indicated that patients in the low-expression group of the WFDC2+tumor cell subtype exhibited a potentially better response to immunotherapy compared to those in the high-expression group.Conclusion:The findings of this study elucidate the role of MYC in the PCa tumor immune microenvironment.Specifically,MYC promotes the proliferation and migration of PCa cells by regulating the expression of CD47.These insights provide novel perspectives for the treatment of PCa patients.

Background and purpose:Patients with prostate cancer(PCa)have consistently shown suboptimal responses to immunotherapy,which may be closely related to the immunosuppressive state of the PCa tumor microenvironment.MYC,a key transcription factor in cancer cells,is involved in cell proliferation,differentiation,apoptosis and immune surveillance by regulating the expression of intracellular genes.This study aimed to elucidate the mechanisms through which MYC fosters an immunosuppressive state within the PCa tumor microenvironment and to delineate its functional impact on PCa cells.Methods:We performed clustering and annotation of single-cell RNA sequencing(scRNA-seq)data from PCa,and conducted subcluster analyses for tumor cells,T cells,and macrophages respectively.The expression changes of MYC and CD47 across tumor subtype were analyzed,and the expression variations of signal regulatory protein alpha(SIRPα)among macrophage subtype were assessed.Furthermore,we divided the PCa transcriptomic dataset samples into high-and low-MYC expression groups based on MYC expression levels,and performed differential expression analysis and enrichment analysis for each group.The functional role of MYC in PCa cells was validated using chromatin immunoprecipitation-quantitative polymerase chain reaction(ChIP-qPCR)and experimental analyses.Furthermore,animal experiments(reviewed and approved by the ethics committee of the First Affiliated Hospital of Henan University of Science and Technology,approval number:D-2025-B015)were conducted to further validate the relationship between MYC and CD47.Finally,we analyzed and validated the whey acidic protein four-disulfide core domain 2(WFDC2)+tumor subtype using transcriptomic data from PCa.Results:Through the analysis of scRNA-seq data from PCa,a total of 32,977 cells were identified,and 7 distinct cell types were annotated.The tumor cells were further divided into 10 tumor cell subtypes,among which the WFDC2+tumor cell subtype exhibited more intensive cellular communication with CD8+T cells and macrophages within the PCa tumor microenvironment.MYC and CD47 exhibited high expression levels during the middle-to-late stages of differentiation in PCa cells,whereas SIRPα maintained high expression throughout the macrophage differentiation trajectory.Enrichment analysis revealed that the WFDC2+tumor cell subtype was primarily enriched in signaling pathways such as transforming growth factor-β(TGF-β)and Wnt/β-catenin.ChIP-qPCR confirmed the regulatory relationship between MYC and CD47 expression.Additionally,it was found that MYC knockdown significantly inhibited the proliferation and invasion abilities of PCa cells,while overexpression of CD47 could reverse this effect.Animal experiment results confirmed an positive correlation between MYC and CD47 protein expression.Furthermore,Tumor Immune Dysfunction and Exclusion(TIDE)and Estimate analyses indicated that patients in the low-expression group of the WFDC2+tumor cell subtype exhibited a potentially better response to immunotherapy compared to those in the high-expression group.Conclusion:The findings of this study elucidate the role of MYC in the PCa tumor immune microenvironment.Specifically,MYC promotes the proliferation and migration of PCa cells by regulating the expression of CD47.These insights provide novel perspectives for the treatment of PCa patients.

Objective To explore the application of evaluation of measurement uncertainty in routine coagulation assays based on the data of internal quality control (IQC) and results of external quality assessment (EQA) .Methods Data of clinical coagulation assays of clinical laboratory of Xiangyang city hospital were collected ,Which came from six months of IQC and 3 times of EQA of ministry of health clinical laboratory center from 2012 to 2013 .The combined and expanded uncertainties of 3 measurements(PT , APTT and Fbg) were evaluated according to CNAS top-downapproach .Results When PT were in 12 .72 s and 21 .04 s ,its ex-panded uncertainty were 1 .06 s and 1 .96 s ,and APTT in 36 .6 s and 50 .6 s were 2 .59 s and 5 .30 s ,and Fbg in 3 .32 g/L was 0 .30 g/L .Conclusion Evaluation of measurement uncertainty by using internal quality control data and EQA results for routine coagula-tion detection index is economical and practical and acceptable way ,with good clinical practice .

[Objective] To assess the predilection age,clinical features,treatment and pognostic factors of primary cutaneous B-cell lymphoma (PCBCL).[Methods] A total of 31 patients with PCBCL were registered in Tianjin Cancer Central Registry from January 1970 to September 2010,and 26 patients had complete medical recortds.A retrospective analysis was conducted on the 26 patients.The following indices were analyzed,including gender,age,body sites of initial involvement,extent of cutaneous involvement,pathological subtypes,metastatic sites,treatment,survival and prognosis.Data were processed with SPSS16.0 software,survival analysis was carried out by using Kaplan-Meier method,univariate analysis of prognostic factors by Log-rank test,multivariate analysis of prognostic faetors by COX proportional hazards model,and variables were selected by Forward LR method.[Results] Clinical manifestafions were atypical in these patients.The ratio of man and women was 1:1.6.Of the 26 cases,12 were primary cutaneous follicle-center lymphoma (PCFCL),8 were primary cutaneous marginal zone lymaphoma (PCMZL),and 4 were PCLBCL,leg type.Follow-up revealed lymph node involvement in 8 patients (4 in cervical nodes and 4 in inguinal nodes),distant metastasis of organs in 3 patients ( 1 in lung and pleura,1 in bone marrow and 1 in central nervous system).Most patients received surgical treatment combined with chemotherapy or chemoradiation.The 5-year overall survival rate was 80.8％(21/26).Statistical analysis showed that the prognosis of PCBCL was associated with histological subtype,lactate dehydrogenase (LDH) level and globulin level,but unrelated to gender,age,site of initial involvement,extent of cutaneous involvement,involvement of lymph nodes and organs,presence of B symptoms,treatment strategies,number of relapses,level of β2-globulin and hemoglobin,or lymphocyte absolute value.[Conclusion]s PCBCL,as a kind of rare extra-nodal lymphoma,usually occurs with atypical clinical mainfestations in persons aged from 39 to 66 years.The 5-year overall survival rate was 80.8％ in these patients.The prognosis of PCBCL seems to be related to histological subtypes,LDH and globulin levels.

Objective To explore the effect of hepatitis B virus(HBV) on the expression of apolipoprotein B(ApoB) and its regulatory mechanism. Methods mRNA and protein expression of ApoB in HepG2 and HepG2.2.15 cells was measured by RT-PCR and Western blot, serum ApoB levels in patients with HBV infection and in healthy individuals were measured by biochemical analyzer Olympus 5400, the expression of ApoB difference among healthy individuals, patients with chronic hepatitis B, liver cirrhosis, and hepatocellular carcinoma were analyzed, HBV infectious clone pHBV1.3 was tranfected into HepG2 cells,and expression of ApoB and microsomal triglyceride transfer protein(MTP) was measured by RT-PCR and Western blot. Results Expression of ApoB mRNA and protein was lower in HepG2.2.15 cells than in HepG2 cells, serum apoB levels was much lower in patients with chronic hepatitis B and liver cirrhosis as compared to healthy individuals( P ＜0.05 ), HBV could inhibit the expression of ApoB and MTP at mRNA and protein levels. Conclusion HBV may downregulate the synthesis and secretion of ApoB via inhibits the expression of MTP.

Objective To explore the regulatory effect of LPS on the expression of interleukin 27 (IL-27),and uncover the relationships among cyclooxyenase-2(COX-2),prostaglandin E2(PGE2) and IL-27.Methods THP-1 cells were stimulated with different doses of LPS,IL-27 and PGE2 levels in the supernatants were measured by enzyme-linked immunosorbent assay(ELISA) at different time,expression of COX-2 was measured by RT-PCR and Western blot.Results IL-27 can be induced by LPS in THP-1 cells in a time and dose dependent fashion,and IL-27 induces COX-2 mRNA expression,COX-2 protein production,and PGE2 release in a time and dose fashion.Conclusion LPS can stimulate the relase of IL-27 at cell level,and IL-27 can induce the expression of COX-2 and production of PGE2.

Objective:To observe the biological behaviors of colorectal cancer LS174 cells before and after pcDNA3.0-hugl-1 transfection,so as to investigate the association of hugl-1 with colorectal cancer.Methods:The eukaryotic expression vector pcDNA3.0-hugl-1 was constructed and transfected into LS174 cells.RT-PCR and Western blotting methods were used to analyze the expression of hugl-1 mRNA and protein in LS174 cells before and after transfection.Soft agar colony formation assay,wound-healing experiment,adhesion assay and Matrigel invasion assays were used to study the effects of hugl-1 expression on the proliferation,adhesion,movement and invasion in LS174 cells.Results:The recombinant plasmid pcDNA3.0-hugl-1 was successfully constructed.RT-PCR and Western blotting showed that the hugl-1 expression was higher in cells transfected with pcDNA3.0-hugl-1 than in those un-transfected or empty vector-transfected cells (P

Objective To determine the content of taurine in Mactra veneriformis by pre-column derivation HPLC.Methods Ultrasound method was used for the extraction of taurine from Mactra veneriformis.In alkaline condition,amino acids reacted with phenyl isothiocyanate and resulted in the derivatives of benzene isothiocyanate-amino acid complex.Kromasil C18 column(4.6 mm ?250 mm,5 ?m) was used and the absorbance at 254 nm was measured.The mobile phase consisted of sodium acetate solution,water and methanol.Results Corresponding chromatographic peaks of taurine were obtained in extract sample and the control.The linear range of taurine was from 10.04 ?g?mL-1 to 50.20 ?g?mL-1,and the recovery was 97.95 %(RSD=1.41%,n=9).Conclusion This method is simple,accurate and reproducible.The seasonal variation range of taurine level is from 10.56 mg/g to 20.91 mg/g,and the taurine level arrived to the peak in June.