目的 采用两样本孟德尔随机化以及Meta分析研究趋化因子C-X3-C基序配体1（CX3CL1）表达水平与系统性红斑狼疮（SLE）发病风险的因果关系。方法 获取CX3CL1表达水平与SLE的全基因组关联研究（GWAS）数据，将单核苷酸多态性（SNP）作为工具变量并选择敏感的SNPs进行分析。通过逆方差加权法（IVW）、加权中位数法（WM）、MR-Egger回归法进行两样本MR分析，以OR值评估CX3CL1表达水平与SLE之间的因果关系，并对结果进行异质性和多效性检验。最后利用R软件Meta包进行Meta分析。利用coloc包进行共定位分析。结果 纳入9个SLE作为结局变量，其中4个变量ebi-a-GCST90018917（OR=2.14，95%CI：1.50~3.06），ebi-a-GCST003156（OR=2.25，95%CI：1.00~5.06），ebi-a-GCST90014238（OR=3.02，95%CI：1.54~5.94），finn-b-SLE_NOS（OR=1.81，95%CI：1.01~3.22）表明CX3CL1表达水平与SLE之间存在因果关系。关于 OR 95% CI 的森林图显示 SLE 患者的CX3CL1表达水平显著高于健康人群（OR=1.87，95%CI：1.53~2.29，P＜0.001）。共定位分析结果提示CX3CL1表达水平和SLE表型之间有共享的遗传变异位点（rs170364）。结论 CX3CL1表达水平与SLE存在正向因果关系，CX3CL1表达水平的升高使得SLE的发病风险升高。
Objective To investigate the causal relationship between CX3CL1 levels and the risk of systemic lupus erythematosus（SLE）using two-sample Mendelian randomization and Meta-analysis methods．Methods Genome-Wide Association Study（GWAS）data for CX3CL1 levels and SLE were obtained．Single nucleotide polymorphisms（SNPs）were used as instrumental variables，and sensitive SNPs were selected for analysis．Two-sample Mendelian randomization was performed using the inverse variance weighted（IVW）method，weighted median（WM）method，and MR-Egger regression to evaluate the causal relationship between CX3CL1 levels and SLE，with OR values assessing this relationship．Heterogeneity and pleiotropy tests were conducted on the results．Meta-analysis was performed using the Meta package in R software，and colocalization analysis was conducted using the coloc package．Results Nine SLE outcomes were included as outcome variables，with four variables（ebi-a-GCST90018917［OR=2.14，95%CI：1.50-3.06］，ebi-a-GCST003156［OR=2.25，95%CI：1.00-5.06］，ebi-a-GCST90014238［OR=3.02，95%CI：1.54-5.94］，finn-b-SLE_NOS［OR=1.81，95%CI：1.01-3.22］）indicating a causal relationship between CX3CL1 expression levels and SLE．The forest plot for OR 95%CI showed that CX3CL1 expression levels in SLE patients were significantly higher than in healthy individuals（OR=1.87［95%CI：1.53-2.29］，P＜0.001）．Colocalization analysis suggested that there was shared genetic variation sites（rs170364）between CX3CL1 expression levels and SLE phenotype．Conclusions There is a positive causal relationship between CX3CL1 expression levels and SLE，with increased CX3CL1 levels elevating the risk of developing SLE．
非自杀性自伤行为（NSSI）是指个体在没有自杀意图的情况下，故意对自己身体进行伤害的行为。近年来，NSSI在全球范围内整体呈上升趋势，尤其在青少年群体中日益普遍，这与青少年的年龄特点、心理及生物学特征、社会压力等因素密切相关。有研究表明，NSSI是自杀行为的独立危险因素，不仅对青少年健康造成严重影响，也给家庭和社会带来了沉重的负担。因此，本文通过系统回顾NSSI相关文献，阐述其流行病学现况、影响因素和干预措施，旨在为早期识别高危人群、预防青少年NSSI行为的发生以及制定相应的干预策略提供科学依据。
Non-suicidal self-injury（NSSI）is the behavior in which an individual intentionally inflicts harm on his or her own body without suicidal intent．In recent years，NSSI has been on the rise globally，especially among adolescents，which is closely related to the age characteristics，psychological and biological characteristics，and social pressure．Some studies have shown that NSSI is an independent risk factor for suicidal behavior，which not only poses a serious impact on the health of adolescents，but also imposes a heavy burden on families and society．Therefore，this article systematically reviews relevant literatures on NSSI，mainly elaborating the epidemiological status，influencing factors and interventions．We aim to provide a scientific basis for the early identification of high-risk populations，the prevention of NSSI in adolescents and the development of corresponding intervention strategies
为规范广州地区“港澳药械通”伦理审查工作，满足临床用药用械需求，保障患者用药用械安全，广州市医学会医学伦理分会、广州市医院协会“港澳药械通”工作专业委员会组织行业专家，结合相关政策法规要求与本地实践经验，广泛征求专家意见，经多次讨论，形成《广州地区“港澳药械通”伦理审查共识》。共识涵盖适用范围、术语和定义、伦理审查的原则、伦理审查的类别、伦理审查的流程、伦理审查的方式及多医疗机构申请的伦理审查等方面。共识旨在为广州地区“港澳药械通”指定医疗机构的伦理审查工作提供指导，统一审查标准，提高审查效率与质量，切实保护患者的合法权益，促进临床急需进口港澳药械的安全合理使用，从而促进粤港澳大湾区医疗健康事业发展。
To standardize the ethical review process of the “Hong Kong and Macao Drugs and Medical Devices Access” in Guangzhou，meet the clinical demand for drugs and medical devices，and ensure the safety of patients’ use of drugs and medical devices，the Medical Ethics Branch of Guangzhou Medical Association and the “Hong Kong and Macao Drugs and Medical Devices Access” Professional Committee of Guangzhou Hospital Association organized industry experts，combined with relevant policy and regulatory requirements and local practical experience，widely solicited expert opinions，the “Consensus on Ethical Review of Drugs and Medical Devices for Hong Kong and Macao in Guangzhou” were formed after several discussions．The consensus content covers aspects such as the scope of application，terms and definitions，principles of ethical review，categories of ethical review，procedures of ethical review，methods of ethical review，and Ethical Review for Multi-institutional Applications．The consensus aims to provide guidance for the ethical review work of designated medical institutions for the “Hong Kong and Macao Drugs and Medical Devices Access” in the Guangzhou area，unify the review standards，improve the efficiency and quality of the review，effectively protect the legitimate rights and interests of patients，promote the safe and rational use of clinically urgently imported medicines and medical devices Hong Kong Macao，and thereby promote the development of medical and health care in the Guangdong-Hong Kong-Macao Greater Bay Area．
目的 分析医院职业暴露工作人员特征、发生职业暴露环节、类型及处理方式,为医院制订干预措施提供理论基础。方法 回顾性分析玉溪市人民医院2018—2023年共301例发生职业暴露工作人员资料, 包括职业暴露时间、性别、年龄、科室、岗位类型、在院工作时间、职位、职业暴露发生环节、职业暴露类型、暴露源、职业暴露后是否需要用药等处置信息。结果 301例职业暴露工作人员平均年龄为（28.81±10.92）岁, 女性占比84.7%（255例）; 57.8%（174例）职业暴露发生在检查/穿刺/注射/采血/置管/治疗/手术等操作中, 38.9%（117例）发生在医疗废物处置环节;87.7%（264例）的暴露类型为针刺伤;45.5%（137例）接触暴露源为有血源性传播疾病的患者。发生职业暴露工作人员中, 不同岗位职业暴露者的暴露类型、职位、科室、是否需要药物干预及接触暴露源情况比较差异有统计学意义（P<0.05）。结论 应加强医务工作者职业暴露相关知识及应急处置培训, 对不同工龄、岗位医务工作者制定针对性培训方案, 加强医疗废物处置流程及临床操作技能规范等知识培训,预防医务工作者职业暴露的发生。
Objective To analyze the characteristics,occupational exposure links, types, and treatment methods of occupational exposure among healthcare staff hospital, providing a theoretical basis for the development of related intervention strategies for hospitals．Methods A retrospective study was conducted to explore 301 cases of occupational exposure among healthcare staff in The People’s Hospital of Yuxi City from 2018 to 2023．Data of 301 cases were collected, including information on gender, age,department,personnel category, length of service in the hospital, job title, and the circumstances of occupational exposures, which covered exposure links, type, source, and post-exposure medication treatment measures．Results Among the 301 healthcare staff experiencing occupational exposure, the average age was（28.81±10.92）years, with 84.7%（255 cases）being female．Occupational exposure most frequently occurred during procedures such as examination, puncture, injection, blood collection, catheterization, treatment, and surgery（57.8%,174 cases）, followed by the disposal of medical waste（38.9%, 117 cases）．The primary type of exposure was needle-stick injury（87.7%）．Contact with patients suffering from blood-borne infectious diseases accounted for 45.5%（137 cases）of the occupational exposure incidents．There were significant differences in exposure types, job positions, departments, sources of exposure, and post-exposure medication treatment measures among healthcare staff of different categories（P<0.05）．Conclusions To prevent the occurrence of occupational exposure among healthcare staff, it is necessary to enhance training on occupational exposure knowledge and emergency management, particularly improving the disposal of medical waste and clinical operational skills．Additionally, it is crucial to have personalized training programs tailored to healthcare staff based on their varying lengths of service and positions．
目的 探讨长链非编码核糖核酸肺腺癌转移相关转录本 1（LncMALAT1）通过竞争性结合微小RNA-506-3p（miR-506-3p）调控Zeste同源物增强子2（EZH2）影响膀胱癌增殖的机制。方法 收集2023年1月—2024年10月的92例外科手术切除的膀胱癌组织及对应的癌旁组织标本, 利用Western blot和定量实时逆转录聚合酶链式反应（qRT-PCR）方法检测LncMALAT1和EZH2的表达情况。根据患者预后分为不良组（n=34）和良好组（n=58）, 收集患者的性别、年龄、肿瘤直径、血管侵袭情况、TNM分期、远处转移情况等临床指标, 结合临床病理指标分析LncMALAT1和EZH2与膀胱癌患者预后的关系。通过体外实验,包括qRT-PCR、Western blot、平板克隆和EdU实验,验证LncMALAT1对EZH2表达和膀胱癌细胞增殖的影响。利用生物信息学技术预测LncMALAT1与miR-506-3p的相互作用,并通过qRT-PCR验证在膀胱癌细胞中上调LncMALAT1表达后miR-506-3p的表达变化。结果 单因素结果显示, 血管侵袭情况、TNM分期、远处转移情况、LncMALAT1及EZH2表达水平均与膀胱癌患者预后不良有关, 差异有统计学意义（均P<0.05）。分析结果发现LncMALAT1与EZH2在膀胱癌组织中的表达呈正相关。体外实验结果显示, 上调LncMALAT1表达后, EZH2的表达显著上调, 且膀胱癌细胞的增殖能力显著提高（均P<0.05）。qRT-PCR验证表明,上调LncMALAT1表达后,miR-506-3p的表达显著下调（P<0.05）, 提示LncMALAT1通过竞争性结合miR-506-3p调控EZH2,进而影响膀胱癌细胞的增殖进展。结论 LncMALAT1通过竞争性结合miR-506-3p调控EZH2促进膀胱癌增殖功能,进而加快膀胱癌细胞的增殖进展, 可为膀胱癌的治疗提供新的潜在靶点。
Objective To explore the mechanism of long non-coding ribonucleic acid metastasis - associated lung adenocarcinoma transcript 1（LncMALAT1）regulating enhancer of Zeste homolog 2（EZH2）through competitive combination with microRNA-506-3p（miR-506-3p）to affect the proliferation of bladder cancer．Methods A total of 92 pairs of bladder cancer tissues and corresponding adjacent normal tissues were collected from surgical resections between January 2023 and October 2024．The expression levels of LncMALAT1 and EZH2 were detected using Western blot and qRT-PCR．The patients were divided into poor group（n=34）and good group（n=58）according to their prognosis．Clinical data, such as gender, age, tumor diameter, vascular invasion, TNM stage, and distant metastasis were collected, and the relationship between LncMALAT1 and EZH2 and the prognosis of bladder cancer patients was analyzed with clinical pathological indicators．Through in vitro experiments, including qRT-PCR Western blot, plate cloning and EdU experiment were conducted to verify the effect of LncMALAT1 on EZH2 expression and bladder cancer cell proliferation．Bioinformatics technology was used to predict the interaction between LncMALAT1 and miR-506-3p, and qRT-PCR was used to verify the change of miR-506-3p expression after up regulating LncMALAT1 expression in bladder cancer cells．Results The univariate results showed that vascular invasion, TNM stage, distant metastasis, LncMALAT1 and EZH2 expression levels were related to the poor prognosis of bladder cancer patients, and the difference was statistically significant（all P<0.05）．The results showed that the expression of LncMALAT1 and EZH2 in bladder cancer was positively correlated．In vitro experiment results showed that after up regulating LncMALAT1 expression, EZH2 expression was significantly up-regulated, and the proliferation ability of bladder cancer cells was significantly improved（all P<0.05）．QRT-PCR validation showed that the expression of miR-506-3p was significantly down regulated after the expression of LncMALAT1 was up-regulated（P<0.05）, suggesting that LncMALAT1 could regulate EZH2 through competitive combination with miR-506-3p, thereby affecting the proliferation and progression of bladder cancer cells．Conclusions LncMALAT1 can promote the proliferation of bladder cancer cells by competitively combining with miR-506-3p to regulate EZH2, and then accelerate the proliferation of bladder cancer cells, which can provide a new potential target for the treatment of bladder cancer．
目的 研究胸腰椎骨质疏松性椎体压缩性骨折（OVCF）经皮椎体成形术（PVP）后腰背部疼痛缓解情况与骨水泥弥散分布的相关性。方法 选取2021年1月—2023年12月金沙县中医医院和毕节市第三人民医院185例因骨质疏松症导致的胸腰椎OVCF行PVP后的患者,根据术后胸腰椎正侧位X线片显示的骨水泥分布情况分为两组：骨水泥分布充分组（n=101例）和骨水泥分布不良组（n=84）, 两组均行PVP, 均行双侧穿刺入路。统计分析两组患者术前、术后及术后1周、3个月、6个月视觉模拟评分（VAS）、患者起床时间等情况。结果 185例患者术后随访半年, 骨水泥分布充分组101例, 骨水泥分布不良组84 例, 两组术后VAS评分均较前缓解（P<0.05）, 术后及术后1周、3个月、6个月的随访中分布充分组VAS评分分别为（7.17±0.76）（2.11±1.04）（1.4±0.78）（0.36±0.58）（0.05±0.22）分, 优于分布不良组（7.14±0.79）（2.37±0.79）（1.89±0.82）（0.68±0.76）（0.25±0.62）分（P<0.05）。结论 骨水泥的分布在一定程度上决定了PVP后患者腰背部残余痛的程度。尤其是骨水泥在椎体内均匀分布时, 可降低术后腰背疼痛的发生率。
Objective To study the relationship between pain relief situation in the lower back and bone cement distribution after percutaneous vertebroplasty（PVP）of thoracolumbar osteoporotic vertebral compression fracture（OVCF）．Methods A total of 185 patients with thoracolumbar OVCF caused by osteoporosis underwent PVP from January 2021 to December 2023 were selected in Jinsha County Hospital of Traditional Chinese Medicine and the Third People’s Hospital of Bijie City．Based on the distribution of bone cement shown in the anteroposterior and lateral X ray films of the thoracolumbar after the operation, they were divided into the group with adequate bone cement distribution（n=101 cases）and the group with poor bone cement distribution（n=84）．Both groups underwent PVP and bilateral puncture approaches．The Visual Analogue Scale（VAS）scores of the two groups of patients before the operation, after the operation, 1 week, 3 months, and 6 months after the operation, as well as the leaving bed time of the patients,were statistically analyzed．Results A total of 185 patients were followed up for half a year after the operation．There were 101 cases in the group with adequate bone cement distribution, and 84 cases in the poor distribution of bone cement group, There was no statistically significant difference in the preoperative general data between the two groups of patients（P>0.05）, and the postoperative VAS scores of both groups were decreased compared with those before operation（P<0.05）．The VAS scores of the adequate distributed group after the operation and in the follow-ups in 1 week, 3 months, and 6 months after the operation were（7.17±0.76）,（2.11±1.04）,（1.4±0.78）,（0.36±0.58） ,and（0.05±0.22）, respectively,better than the poor distribution group （7.14±0.79）,（2.37±0.79）,（1.89±0.82）,（0.68±0.76）,（0.25±0.62）, P<0.05．Conclusions The distribution of bone cement determines to a certain extent the degree of residual pain in the low back of patients after PVP．Especially when the bone cement is evenly distributed within the vertebral body, the incidence of postoperative low back pain can be reduced．
目的 优化纸质版脊髓损伤神经功能评估系统, 探讨其在脊柱脊髓损伤患者临床管理中的实际应用效果。方法 广泛检索国内外关于脊柱脊髓损伤患者神经运动功能评估的文献, 结合课题组成员的临床经验, 初步筛选出神经运动功能评估的关键项目。通过两轮德尔菲专家函询, 确定评估项目内容, 对纸质版脊髓损伤神经功能评估系统进行优化, 并进行临床应用验证。选取2021年8月1日—2023年5月31日在广州市第一人民医院脊柱外科住院的120例脊柱脊髓疾病患者作为研究对象, 随机分为观察组和对照组。对比两组在应用优化前后评估系统的神经功能评估准确性、评估所需时间以及临床应用便捷性等方面的差异。结果 观察组的评估准确性显著高于对照组,错评率由20.3%降至4.7%,漏评率由32.0%降至5.0%; 此外,优化后的评估系统显著缩短了评估时间,平均减少6.0 min, 有效提升了评估效率。结论 优化后的脊髓损伤神经功能评估系统显著提高了评估的准确性和效率, 有效减少了主观误差。
Objective To refine and optimize the paper-based assessment tool for evaluating neurological function in spinal cord injury patients, and to explore its impact on clinical practice．Methods A comprehensive review of existing literature on neuromotor function assessment in spinal cord injury patients was conducted, complemented by discussions among members of this study．This led to the integration of a preliminary evaluation framework．Subsequently, a two-round Delphi consensus process involving experts was undertaken to finalize the content of the assessment project．Based on this, a paper-based evaluation system was developed and converted into an electronic format by computer professionals．This system was then tested in a clinical setting, where it was administered to 120 spinal cord injury patients at the Spine Surgery Department of Guangzhou First People’s Hospital between 1 August 2021 and 31 May 2023．Patients were randomly assigned to either an experimental group or a control group, allowing for a comparison of accuracy, efficiency, and convenience in clinical application．Results The experimental group demonstrated a notable improvement in assessment accuracy over the control group, with a significant reduction in error rate from 20.3% to 4.7% and a decrease in omission rate from 32.0% to 5.0%．Furthermore, the average assessment time was shortened by 6.0 minutes, markedly enhancing the efficiency of the evaluation process．Conclusions The optimized neurological function assessment system for spinal cord injury patients has proven effective in enhancing both the accuracy and efficiency of assessments, while significantly minimizing subjective errors．This system holds considerable potential for widespread clinical adoption and application．
目的 探讨64层螺旋CT三维重建技术在主动脉夹层介入术前评估中的价值。方法 选择2023年7月—2024年5月在潜江市中心医院诊治的主动脉夹层疑似患者96例为研究对象,所有患者均进行64层螺旋CT三维重建技术检查, 记录成像参数。所有患者在64层螺旋CT三维重建后进行介入治疗, 以介入检查结果为金标准, 判断64层螺旋CT三维重建技术在主动脉夹层介入术前评估中的价值。结果 在96例患者中, 64层螺旋CT三维重建联合判断为主动脉夹层60例, 其中Ⅰ型32例、Ⅱ型20例、Ⅲ型8例,其中再现（VR）、最大密度投影（MIP）及多平面重建（MPR）分别判断为主动脉夹层56例、54例、56例。在96例患者中, 64层螺旋CT三维重建检查的破口层面主动脉平均直径（3.08±0.25）cm、破口至左锁骨下平均距离（4.05±0.26）cm, 与介入治疗检查（3.05±0.36）cm、（4.06±0.14）cm, 对比差异无统计学意义（t=0.671, P=0.503; t=0.332, P=0.740）。64层螺旋CT三维重建联合、VR、MIP、MPR对主动脉夹层的诊断灵敏度分别为98.33%、93.22%、89.83%、94.92%, 特异度分别为97.30%、97.30%、97.30%、100.00%, 准确率分别为98.96%、94.79%、92.71%、96.88%。结论 64层螺旋CT三维重建技术在主动脉夹层介入术前评估中具有很高的灵敏度、特异度与准确率。
Objective To explore and analyze the value of 64-slice spiral CT three-dimensional reconstruction technology in the preoperative assessment of aortic dissection（AD）intervention．Methods From July 2023 to May 2024, 96 cases of patients suspected of aortic dissection treated in our hospital were selected as the research subjects．All patients underwent 64-slice spiral CT three-dimensional reconstruction technology examination, and imaging parameters were recorded．After the 64-slice spiral CT three-dimensional reconstruction, all patients were given interventional treatment, and the results of the interventional examination were used as the “gold standard” to evaluate the value of 64-slice spiral CT three-dimensional reconstruction technology in the preoperative assessment of aortic dissection intervention．Results Among the 96 patients,64-slice spiral CT three-dimensional reconstruction combined diagnosis identified 60 cases of aortic dissection,including 32 type I, 20 type II, and 8 type III cases．volume rendering（VR）, maximum intensity projection（MIP）, and muhiplanar reconstrudion（MPR） identified 56, 54, and 56 cases of aortic dissection,respectively．In 96 patients, the mean aortic diameter at the lacerated level and the mean distance from the lacerated to the left subclavicular level were（3.08±0.25）cm and（4.05±0.26）cm respectively in 64-slice spiral CT three-dimensional reconstruction examination, compared with（3.05±0.36）cm and（4.06±0.14）cm in interventional examination．There was no difference in comparison（t=0.671, P=0.503; t=0.332, P=0.740）．The sensitivity, specificity, and accuracy of the 64-slice spiral CT three-dimensional reconstruction combined, VR, MIP, and MPR for the diagnosis of aortic dissection were 98.33%, 93.22%, 89.83%, 94.92%, specificity were 97.30%, 97.30%, 97.30%, 100%, accuracy were 98.96%, 94.79%, 92.71%, 96.88%．Conclusions Technology of 64-slice spiral CT three-dimensional reconstruction has high sensitivity, specificity, and accuracy in the preoperative assessment of aortic dissection intervention and is worth promoting and applying clinically．
目的 探讨降钙素原（PCT）联合营养指标对肝硬化营养状况的评定价值。方法 选取2021年2月—2022年3月在右江民族医学院附属医院感染科住院的140例肝硬化患者,根据营养风险筛查2002（NRS 2002）将其分为有营养风险组和无营养风险组。比较两组肝硬化患者中营养指标体质指数（BMI）、血红蛋白（HGB）、前白蛋白（PA）、白蛋白（ALB）、视黄醇结合蛋白（RBP）水平, 并分析它们与PCT的相关性。结果 BMI、HGB、ALB、PA及RBP水平低于低营养风险组（P<0.05）; 营养指标（BMI、HGB、ALB、PA、RBP）与PCT呈负相关（P<0.05）。二元Logistics回归分析发现ALB、PCT是肝硬化患者营养风险的危险因素（P<0.05）。ROC结果显示PCT与ALB的联合营养指标评定肝硬化营养不良的曲线下面积为0.984,（95%CI：0.964~1.000）, 灵敏度98.8%, 特异度93.3%, 约登指数0.921; ALB、PCT的AUC分别为0.919、0.974。结论 肝硬化患者PCT水平与其营养状况密切相关, 对营养状况的评定有一定的价值, 联合评定能有效提高其评定价值。
Objective To explore the value of procalcitonin（PCT）combined with nutritional indexes in evaluating the nutritional status of liver cirrhosis．Methods A total of 140 patients with cirrhosis admitted to the Department of Infection of the Affiliated Hospital of Youjiang Medical College for Nationalities from February 2021 to March 2022, they were selected and divided into with and without nutritional risk group according to nutritional risk screening 2002（NRS 2002）．The levels of body mass index（BMI）, hemoglobin（HGB）, prealbumin（PA）, albumin（ALB）and retinol binding protein（RBP）in two groups of patients with cirrhosis were compared, and the correlation between them and PCT was analyzed．Results The levels of BMI, HGB, ALB, PA and RBP were lower than those of low nutritional risk group（P<0.05）．The nutritional indices（BMI, HGB, ALB, PA, RBP）were negatively correlated with PCT（P<0.05）．Binary Logistics regression analysis showed that ALB and PCT were risk factors affecting nutritional risk in patients with cirrhosis（P<0.05）．ROC results showed that the area under the curve was 0.984（95% confidence interval：0.964 ~ 1.000）, sensitivity 98.8%, specificity 93.3%, and Yoden index 0.921 for the combined PCT and ALB indexes predicting malnutrition in cirrhosis．The AUC of ALB and PCT were 0.919 and 0.974, respectively．Conclusions The level of PCT in patients with cirrhosis is closely related to their nutritional status, which has certain value in the evaluation of nutritional status, and combined prediction can effectively improve the evaluation value．
目的 探讨卵巢癌化学治疗（化疗）耐药与焦孔素E（GSDME）基因的甲基化是否有关, 以及地西他滨是否可以通过去甲基化使GSDME蛋白表达水平升高从而逆转卵巢癌化疗耐药。方法 顺铂逆浓度梯度构建SKOV-3卵巢癌耐顺铂细胞株（SKOV-3/DDP）; CCK8法检测耐药前后细胞株的半抑制浓度（IC50）; 实时荧光定量甲基化特异性PCR法检测两组细胞中GSDME基因的甲基化水平; Wetern Blot检测两组细胞中GSDME的表达水平。将耐药细胞株用不同质量浓度的地西他滨处理,重复上述实验, 检测地西他滨处理前后细胞的IC50、GSDME基因的甲基化水平及GSDME蛋白的表达程度。结果 与SKOV-3细胞相比, SKOV-3/DDP中GSDME基因的甲基化水平升高（P<0.01）, 同时GSDME蛋白的表达水平降低（P<0.001）; 随着地西他滨作用浓度的升高, 耐药细胞中GSDME基因的甲基化程度逐渐降低, 蛋白的表达水平逐渐升高, 细胞的IC50逐渐降低：在用0.5 μg/mL地西他滨处理耐药细胞后GSDME基因的甲基化水平虽然降低（P<0.01）, 但是此时蛋白的表达水平及耐药细胞的IC50均无明显改变（P>0.05）; 当地西他滨的浓度增加到1.0 μg/mL时蛋白的表达水平才明显升高（P<0.05）, 而此时细胞的IC50仍未见明显降低（P>0.05）; 待药物浓度达到1.5 μg/mL时, 细胞的IC50才表现出明显的下降趋势（P<0.05）。结论 GSDME的表达与卵巢癌的化疗耐药密切相关, GSDME的高甲基化水平致使其低表达可促进卵巢癌的化疗耐药。但地西他滨可以通过去甲基化使卵巢癌耐药细胞中GSDME的表达水平升高, 从而增加卵巢癌细胞对化疗药物的敏感性, 进而逆转卵巢癌化疗耐药。
Objective To explore whether drug resistance in ovarian cancer is associated with gasdermin E（GSDME） methylation, and to explore whether decitabine can reverse ovarian cancer chemoresistance by increasing GSDME protein expression levels through demethylation．Methods The cisplatin-resistant cell line（SKOV-3/DDP）was constructed by inverse concentration gradient of cisplatin．Semi-inhibitory concentration（IC50）of cell lines after drug resistance was detected using the CCK8 assay．Real-time fluorescence quantitative methylation-specific PCR was used to detect the methylation level of GSDME gene in the two groups of cells．Wetern Blot was used to detect the expression level of GSDME in the two groups of cells．Drug-resistant cell lines were treated with different concentrations of the demethylating drug decitabine．Experiments above were repeated to detect the methylation degree of IC50 and GSDME genes and the expression level of GSDME protein in drug-resistant cells before and after decitabine treatment．Results Compared with SKOV-3 cells, the methylation level of GSDME gene in SKOV-3/DDP was significantly increased（P<0.01）, while the expression level of GSDME protein was significantly decreased（P<0.001）．With the increase of decitabine concentration, the methylation degree of GSDME gene in drug-resistant cells was gradually decreased, the expression level of protein was gradually increased, and the IC50 of cells was gradually decreased：the methylation level of GSDME gene was decreased after 0.05 μg/mL decitabine treatment（P<0.01）, but there were no significant changes in protein expression level and IC50 of drug-resistant cells（P>0.05）．The protein expression level was significantly increased when the concentration of local citabine was increased to 0.10 μg/mL（P<0.05）, while the IC50 of the cells was not significantly decreased（P>0.05）．When the drug concentration reached 0.15 μg/mL, he IC50 of the cells showed a significant downward trend（P<0.05）．Conclusions The expression of GSDME is closely related to chemoresistance in ovarian cancer, and the low expression of GSDME due to its high methylation level can promote chemoresistance in ovarian cancer．However, decitabine can increase the expression level of GSDME in drug-resistant ovarian cancer cells through demethylation,thereby increasing the sensitivity of ovarian cancer cells to chemotherapeutic drugs, and then reversing the chemoresistance of ovarian cancer．
