AIM:To examine the latent membrane protein 1(LMP1)-DNA sequence in nasopharyngeal carcinoma(NPC) and detect mRNA expression of LMP1, EBNA1, EBNA2, and to explore the relationship between EBV infectious status, expression products and NPC carcinogenesis.METHODS: LMP1 DNA was detected in NPC by PCR. Direct sequence was applied to analyze the difference between NPC-LMP1-DNA and B95-8-LMP1-DNA. mRNA expressions of LMP1, EBNA1, EBNA2 in NPC were detected by nested RT-PCR.RESULTS: LMP1 DNA existed in all 47 NPC tissues. Several single nucleotide variations were found between NPC-LMP1-DNA and B95-8-LMP1-DNA. The notable variation was the lost of XhoⅠrestriction site in NPC. Direct sequence showed 30 bp deletion in NPC. The mRNA expressions of LMP1, EBNA1 and EBNA2 in NPC were 76.6%, 80.0% and 74.5% respectively by nested RT-PCR. The expression of EBNA1 in NPC was promoted by Q promoter while the expression of EBNA1 in B95-8 was promoted by C promoter.CONCLUSION: The way of EBV involved in NPC is complex. Latent genes such as LMP1, EBNA1 and EBNA2 as well as early lytic gene BARF1 may all play certain roles in NPC carcinogenesis.

AIM: Our study focused on investigation of tissue specific regulatory activity of the newly cloned promoter: PLUNC-p with driving enhanced green fluorescent protein ( EGFP ). METHODS: Transgenic Xenopus Laevis system was applied.RESULTS: The green fluorescence protein directed under PLUNC-p was expressed strictly in branchial arches and epidermis of Xenopus Laevis embryos while CMV promoter showed ubiquitous regulation characteristic.CONCLUSION: PLUNC-p is able to direct epithelia specific expression of EGFP . This property of PLUNC-p might raise the possibility that lead target genes to express tissue-specifically.

Objective The management of high-value medical consumables is a key challenge for healthcare institutions,yet medical record quality control(MRQC)is rarely applied in this area.This study aims to explore the role of MRQC in the management of high-value medical consumables.Methods A joint inspection team for MRQC was formed.Using the"High-Value Consumable Use Informed Consent Checklist,""High-Value Consumable Medical Record Sampling Statistics Table,""Surgical Operation Record Inspection Detail Table,"and"High-Value Medical Consumable Usage List Barcode Inspection Table,"we conducted random checks on the medical records of the top ten departments with high usage of these consumables.The main focus was on the informed consent forms,surgical operation records,barcode labeling of usage lists,and expense lists related to high-value medical consumables.We analyzed the consistency and compliance of registration information,informed consent forms,surgical records,and barcode labels,calculated defect rates for each indicator,identified causes of defects,and implemented quality improvements,including refining regulations and enhancing training;conducting reviews of high-value con-sumable medical records;initiating secondary management of high-value consumables;strengthening supervision;and establis-hing a long-term mechanism.Results Before improvements,the defect rates for informed consent forms,surgical records,and barcode labels were 13.3％,27.9％,and 42.7％,respectively.After improvements,these rates dropped to 1.4％,2.2％,and 1.6％.Comparisons of the three indicators before and after showed significant differences(P＜0.01).Conclusion The appli-cation of MRQC in managing high-value medical consumables is essential.Through medical record checks,we can achieve the"five checks and five correspondences"regarding the registration information of high-value medical consumables,informed con-sent forms,written records in surgical operation records,barcode labeling of usage lists,and expense lists.The key to successful implementation is thorough preparation before inspections,interdepartmental collaboration,problem-oriented self-assessment,strict discipline,and continuous improvement.

Objective To study the safety and effectiveness of chloral hydrate in children undergoing ABR tests.Methods From December 2015 to March 2022,5 513 children under the age of 12 were selected for ABR ex-amination in West China Hospital of Sichuan University,who received chloral hydrate sedation(dose of 30 mg/kg).Data on administration method(mixed or direct),sleep deprivation(yes or no),failure performance(such asfailure to sleep,insufficient sedation,superficial sleep),adverse events(vomiting,irritability,etc.)were retrospectively analyzed.Total sedation failure rate,sedation failure rates in different age groups(≤0.5 years,0.5～3 years,3～12 years)and adverse event rate were calculated.Results Among the 5 513 ABR tests,199(3.61％)failed seda-tion.The sedation failure rates in different age groups(≤0.5 years,0.5～3 years,3～12 years)were 3.03％,4.31％and 3.11％,respectively.In the sedation failure tests,insufficient sedation was found in 81.91％of the tests.The incidence of adverse events was 10.55％,with most commonly vomiting.Conclusion The sedation fail-ure rate and the incidence of adverse events of chloral hydrate at 30 mg/kg were relatively low,thus chloral hydrate can be considered safe and effective at this dose.

Objective:Hepatic fibrosis is a common pathological basis for many chronic liver diseases and can progress to cirrhosis,a leading cause of mortality in liver diseases.Early identification and reversal of hepatic fibrosis are key in the treatment of chronic liver disease.This study aims to compare the expression levels of serum core fucosylated low molecular weight kininogen(LMWK-Fc)and alpha-galactosylated(α-Gal)antibodies in patients with hepatic fibrosis at different stages,and to evaluate their diagnostic efficacy for hepatic fibrosis. Methods:A retrospective analysis was conducted on 275 patients with chronic liver disease who visited the Department of Infectious Diseases at the Second Xiangya Hospital of Central South University between June 2022 and March 2023.Among these,115 patients underwent liver biopsy.Based on the extent of collagen deposition and its impact on liver structure and microcirculation,patients were staged from 0 to 4:S0(no significant collagen deposition in liver tissues;liver structure and microcirculation are normal),S1(mild collagen deposition in liver tissues,with partial disruption of lobule structure,but microcirculation remains largely normal),S2(moderate collagen deposition in liver tissues,with partial disruption of lobule structure and microcirculation),S3(extensive collagen deposition in liver tissues,with substantial disruption of lobule structure and microcirculation),and S4(development of cirrhosis,with heavy collagen deposition,complete disruption of lobule structure,and severe impairment of microcirculation).Patients were grouped as no fibrosis(S0),fibrosis(S1-S2),and significant fibrosis(S3-S4).For the 160 patients without liver biopsy,they were categorized based on liver stiffness measurement(LSM)value:no fibrosis(F0:LSM＜7.3 kPa),fibrosis(F1-F2:LSM 7.3-12.4 kPa),and significant fibrosis(F3-F4:LSM＞12.4 kPa).Demographic data(age,gender)and laboratory indicators(alanine transaminase,aspartate transaminase,gamma-glutamyl transferase,alkaline phosphatase,alpha-fetoprotein,platelet count)were collected to calculate the fibrosis-4 index(FIB-4)and aspartate aminotransferase-to-platelet ratio index(APRI).Serum LMWK-Fc and α-Gal antibodies were measured and compared across the groups,and their correlation with fibrosis severity was analyzed.The receiver operating characteristic(ROC)curve was used to assess the predictive value of serum LMWK-Fc and α-Gal antibody levels for hepatic fibrosis. Results:Among the 160 patients without complete liver biopsy,serum α-Gal antibody and LMWK-Fc levels increased progressively from the no fibrosis group to the significant fibrosis group,with statistically significant differences(P＜0.05).Among the 115 patients with liver biopsy,serum LMWK-Fc levels were significantly higher in the fibrosis group and the significant fibrosis groups compared with the no fibrosis group,and α-Gal antibody levels were significantly higher in the significant fibrosis group compared with the no fibrosis group and the fibrosis group(P＜0.001,P=0.032,respectively).Univariate and multivariate linear regression analyses showed that hepatic fibrosis was correlated with gender and LMWK-Fc levels(both P＜0.05),but not with age,α-Gal antibody levels,FIB-4,or APRI(all P＞0.05). Conclusion:The expression levels of serum LMWK-Fc and α-Gal antibodies vary across different stages of hepatic fibrosis,suggesting a potential association with fibrosis progression.LMWK-Fc levels have a certain predictive value for the diagnosis of hepatic fibrosis.

OBJECTIVE Taking Professor Zhou Zhongying's clinical cases of treating hyperthyroidism as the research object,this article explored the use of the TabNet model based on neural networks to discover the diagnosis and treatment rules of hyperthyroid-ism,providing a method reference for inheriting the academic thoughts of famous veteran traditional Chinese medicine practitioners and assisting clinical diagnosis and treatment.METHODS Based on the clinical diagnosis and treatment cases of hyperthyroidism of Pro-fessor Zhou Zhongying and his team,standardized and structured training data were constructed;algorithms based on attention mecha-nism and sparse feature selection mechanism were studied;a pathogenesis prediction model was constructed by inputting standardized clinical manifestations,standardized tongue and pulse conditions;core symptoms,pathogenesis and medication were analyzed,as well as the relationship between the three.RESULTS The trained prediction model was used to predict the 6 pathogenesis of liver stagna-tion,liver fire,phlegm fluid,kidney deficiency,yin deficiency,and blood stasis.Compared with multi-label classification models constructed by classic algorithms such as decision trees and random forests,this model had better classification and prediction indica-tors.Mining was carried out through the decision tree algorithm,and 6 core pathogenesis corresponding Chinese medicine groups were summarized:vinegar-baked Bupleurum chinense,prunella vulgaris,oyster,processed Carapax trionycis,Scrophularia ningpoensis,Asparagus cochinchinensis,Ophiopogon japonicus,etc.CONCLUSION Using the TabNet algorithm on clinical medical record data to build a pathogenesis prediction model based on clinical manifestations,tongue and pulse conditions can effectively predict the core pathogenesis,and then discover the connection between symptoms,pathogenesis and medication,providing methodological references for the inheritance of academic ideas of famous veteran traditional Chinese medicine practitioners and clinical auxiliary diagnosis and treatment decision-making.