Objective: To compare and analyze the antibacterial effects of platelets against five common clinical pathogenic bacteria including MRSA, SE, SA, E. coli, and CRKP, and to preliminarily explore the role of DCD sensitivity in the observed variations of antibacterial effects. Methods: The same number of platelets were used to establish co-culture systems of platelets and platelet lysates with the five pathogenic bacteria. The antibacterial effects of platelets and platelet lysates on the five pathogenic bacteria were evaluated by observing the turbidity of the bacterial solution, measuring the OD value of the bacterial solution and counting the colonies. The supernatant protein of platelets co-cultured with MRSA was collected for quantitative proteomics analysis to explore the important antibacterial proteins of platelets. The content of DCD in the supernatant after co-culture of platelets and platelet lysates with the five pathogenic bacteria was detected by ELISA to preliminarily analyze the reasons for the different antibacterial effects of platelets on the five pathogenic bacteria. Results: Compared with the control group of MRSA, SA, and SE, the turbidity of the bacterial solution decreased after co-culture of platelets and platelet lysates with MRSA, SA, and SE for 12 h, and the OD value and colony count were significantly reduced (P<0.05). The turbidity of the bacterial solution did not change significantly after co-culture of platelets and platelet lysates with E. coli for 24 h, but the OD value decreased (P<0.05), and the colony count decreased to 10 CFU/mL but the difference was not statistically significant (P>0.05). Compared with the control group of CRKP, the turbidity, OD value, and colony count of the bacterial solution did not change significantly after co-culture of platelets and platelet lysates with CRKP (P>0.05). Proteomics results showed that after co-culture with MRSA, important proteins related to platelet activation, including collagen, fibrinogen, von Willebrand factor, integrin αIIbβ3, platelet glycoprotein V and IV were significantly up-regulated. ELISA results showed that after co-culture with the five pathogenic bacteria, platelets could secrete a large amount of DCD, with the content around 3 μg/mL. Conclusion: The antibacterial effect of platelets on Gram-positive bacteria MRSA, SA, and SE is better than that on Gram-negative bacteria E. coli and CRKP, and platelets have the best antibacterial effect on MRSA. The differences in antibacterial effects of platelets on the five pathogenic bacteria may be related to the sensitivity of DCD antibacterial peptides to the five pathogenic bacteria.

Objective To investigate the common molecular features of immunothrombosis, thus enhancing the comprehension of thrombosis triggered by immune and inflammatory responses and offering crucial insights for identifying potential diagnostic and therapeutic targets. Methods Differential gene expression analysis and functional enrichment analysis were conducted on datasets of systemic lupus erythematosus (SLE) and venous thromboembolism (VTE). The intersection of differentially expressed genes in SLE and VTE with those of neutrophil extracellular traps (NET) yielded cross-talk genes (CG) for SLE-NET and VTE-NET interaction. Further analysis included functional enrichment and protein-protein interaction (PPI) network assessments of these CG to identify hub genes. Venn diagrams and receiver operating characteristic (ROC) curve analysis were employed to pinpoint the most effective shared diagnostic CG, which were validated using a graft-versus-host disease (GVHD) dataset. Results Differential expression genes in SLE and VTE were associated with distinct biological processes, whereas SLE-NET-CG and VTE-NET-CG were implicated in pathways related to leukocyte migration, inflammatory response, and immune response. Through PPI network analysis, several hub genes were identified, with matrix metalloproteinase 9 (MMP9) and S100 calcium-binding protein A12 (S100A12) emerging as the best shared diagnostic CG for SLE (AUC: 0.936 and 0.832) and VTE (AUC: 0.719 and 0.759). Notably, MMP9 exhibited good diagnostic performance in the GVHD dataset (AUC: 0.696). Conclusion This study unveils the common molecular features of SLE, VTE, and NET, emphasizing MMP9 and S100A12 as the optimal shared diagnostic CG, thus providing valuable evidence for the diagnosis and therapeutic strategies related to immunothrombosis. Additionally, the expression of MMP9 in GVHD highlights its critical role in the risk of VTE associated with immune system disorders.
Humans ; Computational Biology/methods* ; Lupus Erythematosus, Systemic/immunology* ; Protein Interaction Maps/genetics* ; Venous Thromboembolism/therapy* ; Matrix Metalloproteinase 9/genetics* ; Extracellular Traps/metabolism* ; Gene Regulatory Networks ; Thrombosis/immunology* ; Graft vs Host Disease/genetics* ; Gene Expression Profiling

Objective To analyze the mutation rates of thrombolytic genes antiphospholipid antibody(APOH),thrombo-regulatory protein(THBD)and PC anticoagulant protein(PROC),providing a theoretical basis for the prevention and treatment of thrombolytic diseases in adolescents.Methods A total of 582 cases 16-year-old adolescents who underwent routine physical examination from May to December 2019 were selected as the study objects.The gene loci such as PROC c.574_576del,THBD c.-151G>T and APOHc.461G>A were detected by PCR-RFLP genotyping detection and gene sequencing technology,and statistical analysis was performed on mutation rates.Results PCR-RFLP genotyping detecting of 582 samples showed that the mutation rate of PROC c.574_576del was about 0.69%(4/582),which was lower than the overall mutation rate in the Chinese population(2.4%),while the mutation rates of THBD c.-151G>T and APOHc.461G>A were about 2.92%(17/582)and 12.71%(74/582),which were higher than the overall mutation rates in Chinese population(0.97%,10.27%).Sequencing analysis showed that APOHc.461G>A mutation was linked with APOHc.422T>C and APOHc.1004G>C mutation.Conclusion The mutation rate of thrombolytic gene in adolescents is different from that of the whole population.The mutation rates of APOHc.461G>A and THBD c.-151G>T are higher than those of the whole Chinese population,indicating that timely detection should be used in the diagnosis and treatment of thrombolytic diseases in adolescents.

【Objective】 To discuss the case reports concerning anti-CD47 monoclonal antibody interfere in pre-transfusion testing, so as to find mitigation strategies for this drug interference. 【Methods】 Blood transfusion cases in clinical trials concerning CD47 mAb drugs at home and abroad were retrieved from PubMed, Medline, Web of Science, Wanfang data knowledge service platform and CNKI database. The characteristics and solutions of this drug interfering with pre-transfusion testing were analyzed. 【Results】 A total of 26 cases concerning anti-CD47 mAb interference in pretransfusion testing were retrieved, and 16 valid cases were included in this study (All received HU5F9-G4 as anti-CD47 mAb). After treatment with Hu5F9-G4, the discrepancy between forward and reverse blood typing reached 77% in pre-transfusion testing. Panagglutination was presented in antibody screenings, and all(100%) platelet antibody screenings was interfered. These results indicated that Hu5F9-G4 seriously affected the compatibility test of blood transfusion. Methods of eliminating anti-CD47 interference, as well as their advantages and disadvantages were further analyzed. 【Conclusion】 The advantages and disadvantages of eliminating anti-CD47 interference with pre-transfusion testing was analyzed according to its characteristics, which could provide reference for the laboratory testing.

Objective To investigate the expression of microRNA-1290 in pancreatic cancer and its role in invasion and metastasis of pancreatic cancer.Methods The expression of microRNA-1290 in pancreatic cancer tissue microarray and pancreatic cancer cell lines (AsPC-1,BxPC-3,Capan-2,Panc-1,and MIA PaCa-2) were detected by immunohistochemistry and QT-PCR.The pancreatic cancer cell lines Panc-1 and MIA PaCa-2 in logarithmic growth phase were treated with microRNA-1290 inhibitor,and the invasion and metastasis ability of pancreatic cancer cells were detected by Transwell and wound healing asssay.Western Blot was used to detect the expression of invasion and metastasis-associated proteins cyclooxygenase 2 (COX-2) and matrix metalloproteinase 2(MMP-2) in pancreatic cancer cell lines.Results (1) The expression of microRNA-1290 in pancreatic cancer tissues was significantly higher than that in normal pancreatic tissues and adjacent tissues (P ＜ 0.05).(2) Compared with pancreatic normal epithelial cells (HPDE),the expression of microRNA-1290 was significantly higher in different pancreatic cancer cell lines (P ＜ 0.05).The expression level of MicroRNA-1290 in Panc-1 and MIAPaCa-2 pancreatic cancer cells was significantly higher than that in other pancreatic cancer cell lines (P ＜ 0.05).(3) The number of invasive and metastatic cells was significantly decreased after treatment with microRNA-1290 inhibitor (P ＜0.05).(4) The expression of MMP-2 and COX-2 were decreased in Panc-1 and MIAPaCa-2 pancreatic cancer cells treated with MicroRNA-1290 inhibitor.Conclusion The expression of MMP-2 and COX-2 may be involved in the invasion and metastasis of pancreatic cancer cell by regulating the expression of microRNA-1290 in pancreatic cancer.

Objective To investigate the therapeutic effects of endoscopic retrograde cholangiopancreatography (ERCP) and laparoscopic bile duct exploration lithotomy (LBDEL) in treatment of intra/extra-hepatic duct stones. Methods There were 110 patients whose intrahepatic stones located in Ⅰ , Ⅱ hepatic duct and 378 patients whose stones only located in the common bile duct. These patients respectively underwent LBDE combined with choledochoscope laser lithotripsy or ERCP combined with endoscopic sphincterotomy (EST) and endoscopic nasobiliary drainage (ENBD) to remove the stones. Common bile ducts were performed primary suture or T tube placement in the LBDEL cases. The evaluation was carried out for perioperative complications and postoperative recovery of the surgical methods. Results The residual stone rate was 31.82% in 110 cases. The rate was higher in ERCP group (51.06%) than that in LBDEL group (17.46%) (P < 0.05). Postoperative recovery was better in LBDEL group than that in ERCP group. The residual stone rate was 8.20% in 378 cases. The rate was lower in ERCP group (3.68%) than that in LBDEL group(11.63%) (P < 0.05). Between the two groups, there had no statistical significance in postoperative recovery. The incidences of bile leakage and pulmonary infection were higher in LBDEL group than in ERCP group. The incidences of abdominal cavity infection, acute pancreatitis, digestive tract perforation and gastrointestinal bleeding were higher in ERCP group than that in LBDEL group. 2 of the 378 patients occurred death were happened digestive tract perforation which were induced during ERCP procedure. Conclusion LBDEL and ERCP demonstrated the same therapeutic effects in the treatment of common bile duct stones. However, ERCP has no large advantages in the treatment of hepatolithiasis, and shows higher complication rates. LBDEL has a significant curative effect for intra-and extrahepatic bile duct calculi and can maintain the integrity of Oddi sphincter. This technology is easy to spread to the basic-level hospital to benefit the majority of patients.

Objective Analysis and evaluation of cystatin C (Cysc) ,N‐acetyl‐beta‐D‐glucosaminidase (NAG) ,β2‐microglobulin (β2‐MG) ,blood urea nitrogen(BUN) ,serum creatinine(Scr) five biological parameters in the diagnosis of early renal damage caused by the diseases of Systemic lupus eythematosus ,diabetes or high blood pressure .Methods Collecting 61 patients with high blood pressure ,62 patients with systemic lupus eythematosus (SLE) ,59 patients with diabetes ,56 cases of healthy controls .Cysc was e‐valuated by immune transmission turbidimetric method ,latex enhanced immune turbidimetric method was used to detectβ2‐MG ,u‐sing two point method to determine NAG ,enzymatic assay Scr ,UV‐GLDH method was used to measure serum BUN ,and using the statistical method to analyze the data .Results There was no significant difference between healthy controls and patients group (P>0 .05) in BUN and Src levels .However ,there were significant differences in Cysc ,urineβ2‐MG and NAG concentrations (P<0 .01) .Under ROC curve ,the largest square of diagnosis indexes for early renal damage caused by SLE ,diabetes ,high blood pres‐sure were blood NAG ,urineβ2‐MG and Cysc .Compared to a single parameter ,the rate of joint detection in the diagnosis of early re‐nal damage is high ,a joint detection of Cysc ,β2‐MG and urine NAG could enhance the positive rate to 88 .7% ,which was signifi‐cantly higher than the joint detection with two indexes (77 .4% ,70 .9% or 66 .1% ) .Conclusion The most sensitive and specific in‐dex in the diagnosis of early renal damage caused by SLE ,diabetes ,high blood pressure were blood respectively NAG ,urine beta 2‐MG and Cysc .Joint detection has higher detection rate ,sensitivity ,specificity ,and has important clinical value in the early diagnosis of patients with renal damage ,which is suitable for clinical application .