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Updated roles of the gut microbiota in exploring shrimp etiology, polymicrobial pathogens, and disease incidence
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作者 Jin-Bo Xiong Hao-Nan Sha Jiong Chen 《Zoological Research》 SCIE CSCD 2024年第4期910-923,共14页
Litopenaeus vannamei is the most extensively cultured shrimp species globally,recognized for its scale,production,and economic value.However,its aquaculture is plagued by frequent disease outbreaks,resulting in rapid ... Litopenaeus vannamei is the most extensively cultured shrimp species globally,recognized for its scale,production,and economic value.However,its aquaculture is plagued by frequent disease outbreaks,resulting in rapid and massive mortality.etiological research often lags behind the emergence of new diseases,leaving the causal agents of some shrimp diseases unidentified and leading to nomenclature based on symptomatic presentations,especially in cases involving co-and polymicrobial pathogens.Comprehensive data on shrimp disease statuses remain limited.In this review,we summarize current knowledge on shrimp diseases and their effects on the gut microbiome.Furthermore,we also propose a workflow integrating primary colonizers,“driver”taxa in gut networks from healthy to diseased states,disease-discriminatory taxa,and virulence genes to identify potential polymicrobial pathogens.We examine both abiotic and biotic factors(e.g.,external and internal sources and specific-disease effects)that influence shrimp gut microbiota,with an emphasis on the“holobiome”concept and common features of gut microbiota response to diverse diseases.After excluding the effects of confounding factors,we provide a diagnosis model for quantitatively predicting shrimp disease incidence using disease common-discriminatory taxa,irrespective of the causal agents.Due to the conservation of functional genes used in designing specific primers,we propose a practical strategy applying qPCR-assayed abundances of disease common-discriminatory functional genes.This review updates the roles of the gut microbiota in exploring shrimp etiology,polymicrobial pathogens,and disease incidence,offering a refined perspective for advancing shrimp aquaculture health management. 展开更多
关键词 Shrimp disease Gut microbiota Polymicrobial pathogens Diagnosis model disease common-discriminatory taxa disease prediction
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Updates of developments in interventional therapy for elderly patients with cardiovascular diseases
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作者 Hua SHEN Xun-Xun FENG +1 位作者 Qian-Yun GUO Yu-Jie ZHOU 《Journal of Geriatric Cardiology》 SCIE CAS CSCD 2024年第1期1-3,共3页
Cardiovascular diseases(CVD)are the leading cause of death in the world and one of the most common diseases in the elderly,with high prevalence and poor prognosis,which seriously affect the health of the elder patient... Cardiovascular diseases(CVD)are the leading cause of death in the world and one of the most common diseases in the elderly,with high prevalence and poor prognosis,which seriously affect the health of the elder patients.One report showed that global deaths from CVD increased from 12.4 million in 1990 to 19.8 million in 2022,reflecting the global population growth and aging,as well as the impact of metabolic,environmental,and behavioral risks.[1]With the progress of aging population,the burden of CVD in the elderly in China has increased year by year,and factors including multiple complications,organ function decline,and high complication rate have made the interventional treatment of CVD in the elderly one of the difficulties and focuses in the field of cardiology in China. 展开更多
关键词 diseaseS PATIENTS PROGNOSIS
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Effects of proton pump inhibitors on inflammatory bowel disease:An updated review
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作者 Yu Liang Zhen Meng +1 位作者 Xue-Li Ding Man Jiang 《World Journal of Gastroenterology》 SCIE CAS 2024年第21期2751-2762,共12页
Inflammatory bowel disease(IBD)is believed to be caused by various factors,including abnormalities in disease susceptibility genes,environmental factors,immune factors,and intestinal bacteria.Proton pump inhibitors(PP... Inflammatory bowel disease(IBD)is believed to be caused by various factors,including abnormalities in disease susceptibility genes,environmental factors,immune factors,and intestinal bacteria.Proton pump inhibitors(PPIs)are the primary drugs used to treat acid-related diseases.They are also commonly prescribed to patients with IBD.Recent studies have suggested a potential association between the use of certain medications,such as PPIs,and the occurrence and progression of IBD.In this review,we summarize the potential impact of PPIs on IBD and analyze the underlying mechanisms.Our findings may provide insights for conducting further investigations into the effects of PPIs on IBD and serve as an important reminder for physicians to exercise caution when prescribing PPIs to patients with IBD. 展开更多
关键词 Drug safety Proton pump inhibitor Inflammatory bowel disease Ulcerative colitis Crohn’s disease
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Update in lean metabolic dysfunction-associated steatotic liver disease
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作者 Karina Sato-Espinoza Perapa Chotiprasidhi +1 位作者 Mariella R Huaman Javier Díaz-Ferrer 《World Journal of Hepatology》 2024年第3期452-464,共13页
BACKGROUND A new nomenclature consensus has emerged for liver diseases that were previously known as non-alcoholic fatty liver disease(NAFLD)and metabolic dysfunction-associated fatty liver disease(MAFLD).They are now... BACKGROUND A new nomenclature consensus has emerged for liver diseases that were previously known as non-alcoholic fatty liver disease(NAFLD)and metabolic dysfunction-associated fatty liver disease(MAFLD).They are now defined as metabolic dysfunction-associated steatotic liver disease(MASLD),which includes cardiometabolic criteria in adults.This condition,extensively studied in obese or overweight patients,constitutes around 30%of the population,with a steady increase worldwide.Lean patients account for approximately 10%-15%of the MASLD population.However,the pathogenesis is complex and is not well understood.AIM To systematically review the literature on the diagnosis,pathogenesis,characteristics,and prognosis in lean MASLD patients and provide an interpretation of these new criteria.METHODS We conducted a comprehensive database search on PubMed and Google Scholar between January 2012 and September 2023,specifically focusing on lean NAFLD,MAFLD,or MASLD patients.We include original articles with patients aged 18 years or older,with a lean body mass index categorized according to the World Health Organization criteria,using a cutoff of 25 kg/m2 for the general population and 23 kg/m2 for the Asian population.RESULTS We include 85 studies in our analysis.Our findings revealed that,for lean NAFLD patients,the prevalence rate varied widely,ranging from 3.8%to 34.1%.The precise pathogenesis mechanism remained elusive,with associations found in genetic variants,epigenetic modifications,and adaptative metabolic response.Common risk factors included metabolic syndrome,hypertension,and type 2 diabetes mellitus,but their prevalence varied based on the comparison group involving lean patients.Regarding non-invasive tools,Fibrosis-4 index outperformed the NAFLD fibrosis score in lean patients.Lifestyle modifications aided in reducing hepatic steatosis and improving cardiometabolic profiles,with some medications showing efficacy to a lesser extent.However,lean NAFLD patients exhibited a worse prognosis compared to the obese or overweight counterpart.CONCLUSION MASLD is a complex disease comprising epigenetic,genetic,and metabolic factors in its pathogenesis.Results vary across populations,gender,and age.Limited data exists on clinical practice guidelines for lean patients.Future studies employing this new nomenclature can contribute to standardizing and generalizing results among lean patients with steatotic liver disease. 展开更多
关键词 LEAN NON-OBESE Non-alcoholic fatty liver disease Metabolic dysfunction-associated fatty liver disease Metabolic dysfunction-associated steatotic liver disease Guidelines Diagnosis Management PATHOGENESIS Treatment
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Fabry Disease: Update, Focusing on Heart Disease by Multimodal Imaging
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作者 Adrian Espejel-Guzman Emily Rodríguez +6 位作者 Valente Fernandez-Badillo Javier Serrano-Roman Aldo Cabello-Ganem Alexis Daniel Aparicio-Ortiz Alberto Ramon-Rios Mariali Palacios-Cruz Nilda Espinola-Zavaleta 《World Journal of Cardiovascular Diseases》 CAS 2024年第6期351-362,共12页
Fabry disease (FD) is a rare X-linked lysosomal accumulation disorder caused by a deficiency in the enzyme alpha-galactosidase A (Gal A), resulting in excessive storage of glycosphingolipids, particularly globotriaosy... Fabry disease (FD) is a rare X-linked lysosomal accumulation disorder caused by a deficiency in the enzyme alpha-galactosidase A (Gal A), resulting in excessive storage of glycosphingolipids, particularly globotriaosylceramide (Gb3). This leads to cellular dysfunction in various organs, with cardiovascular compromise being the major cause of morbidity and mortality. This study aimed to provide a comprehensive overview of FD focusing on its genetic, epidemiological, clinical, diagnostic, and therapeutic aspects. This study explored the genetic mutations associated with FD, its epidemiology, clinical phenotypes, cardiac manifestations, diagnostic approaches, and current treatment options. Background: FD is caused by mutations in GLA on the X chromosome, with over 1000 identified variants. Neonatal screening and specific studies have shown an increased incidence of FD. The clinical presentation varies between classic and late phenotypes, with cardiac involvement being a major concern, particularly in late-onset FD. Purpose: This study aimed to summarize the current knowledge on FD, emphasizing cardiac involvement, diagnostic modalities, and treatment options. Methods: A literature review of relevant studies on FD, including genetics, epidemiology, clinical presentation, diagnostic methods, and treatment options, was conducted. Results: Cardiac manifestations of FD included left ventricular hypertrophy (LVH), heart failure, arrhythmias, and sudden death. Diagnostic approaches such as electrocardiography, echocardiography, and cardiac magnetic resonance imaging play crucial roles in the early detection and monitoring of cardiac involvement. Enzyme replacement therapy (ERT) and emerging treatments have shown promise in managing FD, although challenges remain. Conclusions: FD remains a challenging condition in cardiology, with under-diagnosis being a concern. Early detection and specific therapy are essential to improve patient outcomes. Echocardiography and cardiac MRI are valuable tools for diagnosis and follow-up. Despite the advances in treatment, accessibility remains an issue. More research is needed to deepen our understanding of FD and to improve therapeutic strategies. 展开更多
关键词 Fabry disease Hypertrophic Cardiomyopathy ECHOCARDIOGRAPHY Cardiac Magnetic Resonance Imaging Enzyme Replacement Therapy
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Report on Cardiovascular Health and Diseases in China 2023:An Updated Summary
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作者 National Center for Cardiovascular Diseases The Writing Committee of the Report on Cardiovascular Health and Diseases in China Shengshou Hu 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 2024年第9期949-992,共44页
Since 1990,China has made considerable progress in resolving the problem of“treatment difficulty”of cardiovascular diseases(CVD).The prevalent unhealthy lifestyle among Chinese residents has exposed a massive propor... Since 1990,China has made considerable progress in resolving the problem of“treatment difficulty”of cardiovascular diseases(CVD).The prevalent unhealthy lifestyle among Chinese residents has exposed a massive proportion of the population to CVD risk factors,and this situation is further worsened due to the accelerated aging population in China.CVD remains one of the greatest threats to the health of Chinese residents.In terms of the proportions of disease mortality among urban and rural residents in China,CVD has persistently ranked first.In 2021,CVD accounted for 48.98%and 47.35%of deaths in rural and urban areas,respectively.Two out of every five deaths can be attributed to CVD.To implement a national policy“focusing on the primary health institute and emphasizing prevention”and truly achieve a shift of CVD prevention and treatment from hospitals to communities,the National Center for Cardiovascular Diseases has organized experts from relevant fields across China to compile the“Report on Cardiovascular Health and Diseases in China”annually since 2005.The 2024 report is established based on representative,published,and high-quality big-data research results from cross-sectional and cohort population epidemiological surveys,randomized controlled clinical trials,large sample registry studies,and typical community prevention and treatment cases,along with data from some projects undertaken by the National Center for Cardiovascular Diseases.These firsthand data not only enrich the content of the current report but also provide a more timely and comprehensive reflection of the status of CVD prevention and treatment in China. 展开更多
关键词 Cardiovascular disease Risk factor PREVALENCE MORTALITY Rehabilitation Basic research Medical device development Health economics
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Research Status of TCM Rehabilitation in Chronic Obstructive Pulmonary Disease (COPD)
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作者 Ran MO Yuanhui JIANG 《Medicinal Plant》 2024年第3期67-70,共4页
This paper mainly analyzes the application status of TCM rehabilitation in chronic obstructive pulmonary disease(COPD),hoping to provide support and help for clinical staff through this study,and promote the further d... This paper mainly analyzes the application status of TCM rehabilitation in chronic obstructive pulmonary disease(COPD),hoping to provide support and help for clinical staff through this study,and promote the further development of COPD rehabilitation program. 展开更多
关键词 CHRONIC OBSTRUCTIVE PULMONARY disease (COpd) TCM Rehabilitation Diagnosis and treatment
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Update on evidence-based clinical application of sodium-glucose cotransporter inhibitors:Insight to uncommon cardiovascular disease scenarios in diabetes
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作者 Shi-Bing Tao Xi Lu +1 位作者 Zi-Wei Ye Nan-Wei Tong 《World Journal of Diabetes》 SCIE 2024年第7期1461-1476,共16页
In this paper,we concentrate on updating the clinical research on sodium-glucose cotransporter inhibitors(SGLTis)for patients with type 2 diabetes who have heart failure with a preserved injection fraction,acute heart... In this paper,we concentrate on updating the clinical research on sodium-glucose cotransporter inhibitors(SGLTis)for patients with type 2 diabetes who have heart failure with a preserved injection fraction,acute heart failure,atrial fibrillation,primary prevention of atherosclerotic cardiovascular disease/cardiovascular disease,and acute myocardial infarction.We searched the data of randomized controlled trials and meta-analyses of SGLTis in patients with diabetes from PubMed between January 1,2020 and April 6,2024 for our review.According to our review,certain SGLTis(empagliflozin,dapagliflozin,canagliflozin,and tofogliflozin),but not sodium-glucose cotransporter 1 inhibitor(SGLT1i),exhibit relatively superior clinical safety and effectiveness for treating the abovementioned diseases.Proper utilization of SGLTis in these patients can foster clinical improvement and offer an alternative medication option.However,clinical trials involving SGLTis for certain diseases have relatively small sample sizes,brief intervention durations,and conclusions based on weak evidence,necessitating additional data.These findings are significant and valuable for providing a more comprehensive reference and new possibilities for the clinical utilization and scientific exploration of SGLTis. 展开更多
关键词 Sodium-glucose cotransporter inhibitors DIABETES Heart failure Atrial fibrillation Atherosclerosis Cardiovascular disease Acute myocardial infarction
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Update on the gut microbiome in health and diseases
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作者 Maurizio Salvadori Giuseppina Rosso 《World Journal of Methodology》 2024年第1期18-32,共15页
The Human Microbiome Project,Earth Microbiome Project,and next-generation sequencing have advanced novel genome association,host genetic linkages,and pathogen identification.The microbiome is the sum of the microbes,t... The Human Microbiome Project,Earth Microbiome Project,and next-generation sequencing have advanced novel genome association,host genetic linkages,and pathogen identification.The microbiome is the sum of the microbes,their genetic information,and their ecological niche.This study will describe how millions of bacteria in the gut affect the human body in health and disease.The gut microbiome changes in relation with age,with an increase in Bacteroidetes and Firmicutes.Host and environmental factors affecting the gut microbiome are diet,drugs,age,smoking,exercise,and host genetics.In addition,changes in the gut microbiome may affect the local gut immune system and systemic immune system.In this study,we discuss how the microbiome may affect the metabolism of healthy subjects or may affect the pathogenesis of metabolism-generating metabolic diseases.Due to the high number of publications on the argument,from a methodologically point of view,we decided to select the best papers published in referred journals in the last 3 years.Then we selected the previously published papers.The major goals of our study were to elucidate which microbiome and by which pathways are related to healthy and disease conditions. 展开更多
关键词 Gut microbiome DYSBIOSIS Pathobionts Gut-brain axis Heart-brain axis Metabolic diseases Omics techniques
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铁死亡加持PD-1/PD-L1抑制剂杀伤肿瘤细胞综述 被引量:2
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作者 杨洋 耿依珂 于丽 《中国免疫学杂志》 CAS CSCD 北大核心 2024年第2期421-423,427,共4页
恶性肿瘤发生发展的每一环节都与免疫调节息息相关,近年铁死亡及PD-1/PD-L1抑制剂杀伤肿瘤细胞方面的研究是一大热点,因其精准治疗肿瘤的效果被越来越多地应用于临床治疗。但目前尚无将PD-1/PD-L1抑制剂与铁死亡治疗肿瘤细胞结合的研究... 恶性肿瘤发生发展的每一环节都与免疫调节息息相关,近年铁死亡及PD-1/PD-L1抑制剂杀伤肿瘤细胞方面的研究是一大热点,因其精准治疗肿瘤的效果被越来越多地应用于临床治疗。但目前尚无将PD-1/PD-L1抑制剂与铁死亡治疗肿瘤细胞结合的研究,本文将对铁死亡的相关机制、铁死亡与肿瘤的关系和PD-1/PD-L1免疫治疗肿瘤等方面进行综述。 展开更多
关键词 铁死亡 pd-1 pd-L1 肿瘤 综述
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Pd催化剂表面物种对丙炔加氢性能的影响
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作者 满毅 杨晨熹 +3 位作者 姜健准 王骞阅 白羽 柳颖 《石油化工》 CAS CSCD 北大核心 2024年第7期929-933,共5页
采用H_(2)-TPR-MS-IR、CO脉冲吸附、He-TPD、H_(2)-TPR-MS、AFM-IR等方法研究了Pd催化剂的表面物种及Pd金属分散度,确定了Pd催化剂的表面物种状态,分析了Pd催化剂的表面物种与催化剂丙炔加氢性能的关系。实验结果表明,Pd催化剂表面存在... 采用H_(2)-TPR-MS-IR、CO脉冲吸附、He-TPD、H_(2)-TPR-MS、AFM-IR等方法研究了Pd催化剂的表面物种及Pd金属分散度,确定了Pd催化剂的表面物种状态,分析了Pd催化剂的表面物种与催化剂丙炔加氢性能的关系。实验结果表明,Pd催化剂表面存在碳物种和氮物种,碳物种和氮物种在800℃以上可被完全脱除。Pd催化剂表面存在的碳物种和氮物种更有利于Pd的分散,促使反应向预期的方向进行,阻碍丙烯的进一步加氢,从而有利于选择性丙炔加氢反应。 展开更多
关键词 pd催化剂 催化加氢 吸附 表面物种
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油气资产折耗与PD储量关系及管控措施研究
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作者 张悦 熊也 +4 位作者 何强 罗旻海 姚莉 尹涛 王俊 《天然气与石油》 2024年第1期149-154,共6页
随着勘探开发不断深入,油气田企业完全成本呈逐年上升趋势,而油气资产折耗在完全成本中占比高达50%左右,降低完全成本的关键在于管控折耗。证实已开发(Proved Developed,PD)储量是油气资产折耗计提基础,主要通过折耗影响完全成本。从油... 随着勘探开发不断深入,油气田企业完全成本呈逐年上升趋势,而油气资产折耗在完全成本中占比高达50%左右,降低完全成本的关键在于管控折耗。证实已开发(Proved Developed,PD)储量是油气资产折耗计提基础,主要通过折耗影响完全成本。从油气资产折耗的影响因素入手,深入挖潜折耗、操作成本、油气资产净额、产量等因素与PD储量之间的量化关联关系。通过实例分析,对不同区块开展折耗—PD储量—操作成本敏感性分析,建立折耗定量分配模型,针对性提出具体折耗管控措施,实现折耗计提与储量评估之间的科学有效联动。研究结果为油气田企业超前部署储量评估、管控油气资产折耗,降低完全成本,优化油气资产结构提供了策略建议。 展开更多
关键词 油气资产折耗 pd储量 油气资产 操作成本 敏感性分析
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肺腺癌患者胸水肿瘤细胞PD-L1/TTF-1表达及应用分析 被引量:1
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作者 刘菲菲 姚健楠 +4 位作者 谷雨妹 赵宏颖 曹勍 金木兰 李雪 《标记免疫分析与临床》 CAS 2024年第3期405-409,420,共6页
目的探讨肺腺癌患者胸水肿瘤细胞程序性细胞死亡配体1(PD-L1)/甲状腺转录因子1(TTF-1)、PD-L1免疫组化染色的表达及与组织标本PD-L1表达一致性及其应用研究。方法选取2021年1月至2023年4月间首都医科大学附属北京朝阳医院收治的符合入... 目的探讨肺腺癌患者胸水肿瘤细胞程序性细胞死亡配体1(PD-L1)/甲状腺转录因子1(TTF-1)、PD-L1免疫组化染色的表达及与组织标本PD-L1表达一致性及其应用研究。方法选取2021年1月至2023年4月间首都医科大学附属北京朝阳医院收治的符合入组条件的50例肺腺癌患者为研究对象,比较同一病例组织标本中肿瘤细胞的PD-L1表达和胸水细胞蜡块中肿瘤细胞的PD-L1、PD-L1/TTF-1表达情况,评估它们之间表达的一致性。结果50例肺腺癌组织标本PD-L1的表达与患者性别、年龄、标本类型、病灶性质、标本来源和EGFR突变对比差异无统计学意义(P>0.05);胸水细胞蜡块中肿瘤细胞PD-L1/TTF-1免疫组化双染的表达与组织标本PD-L1表达的一致性较好(κ=0.846,P<0.05),明显高于PD-L1免疫组化单染(κ=0.754,P<0.05),与手术或活检切除标本一致性较好(κ=0.90,P<0.05),高于胸腔镜或穿刺小标本(κ=0.82,P<0.05),与原发病灶标本的一致性适中(κ=0.689,P<0.05),与转移病灶标本的一致性较好(κ=0.779,P<0.05)。结论胸水细胞学标本采用PD-L1/TTF-1免疫组化双染与组织标本PD-L1表达一致性较高,细胞蜡块PD-L1/TTF-1双染可在组织不易获取时作为一种有益补充,供临床制定免疫治疗方案参考。 展开更多
关键词 肺肿瘤 腺癌 胸水细胞学 pd-L1 TTF-1
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老年晚期非小细胞肺癌患者PD⁃1抑制剂临床疗效及预后与淋巴细胞亚群水平的关系研究
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作者 孙军 郑皆红 +1 位作者 曾悦 李红苗 《中国肿瘤外科杂志》 CAS 2024年第4期372-376,共5页
目的探讨老年晚期非小细胞肺癌患者淋巴细胞亚群水平与程序性细胞死亡蛋白⁃1(PD⁃1)抑制剂临床疗效及预后的关系。方法选取2021年6月至2023年4月在建湖县人民医院接受PD⁃1抑制剂治疗的非小细胞肺癌老年患者75例,根据治疗3个月后是否有效... 目的探讨老年晚期非小细胞肺癌患者淋巴细胞亚群水平与程序性细胞死亡蛋白⁃1(PD⁃1)抑制剂临床疗效及预后的关系。方法选取2021年6月至2023年4月在建湖县人民医院接受PD⁃1抑制剂治疗的非小细胞肺癌老年患者75例,根据治疗3个月后是否有效分为有效组(n=60)和无效组(n=15);根据无进展生存期(PFS,中位PFS为9个月)分为生存期长组(n=50,>9个月)和生存期短组(n=25,<9个月)。比较不同疗效组、不同预后组的临床相关指标,运用多因素Logistic回归分析预测非小细胞肺癌淋巴细胞亚群水平与PD⁃1抑制剂临床疗效及预后的独立危险因素。结果有效组的PD⁃L1≥50%占比、CD4^(+)、NK细胞和Tregs含量为51.67%、(35.08±9.45)、(21.79±9.15)、(6.61±2.53),均高于无效组的20.00%、(30.45±8.15)、(17.78±7.56)、(5.18±1.06)(P<0.05)。生存期长组的PD⁃L1≥50%占比、CD4^(+)、NK细胞和Tregs含量为60.00%、(42.65±9.85)、(23.68±9.86)、(7.65±2.51),均高于生存期短组的16.00%、(30.45±8.62)、(18.42±8.96)、(5.23±2.53)(P<0.05)。多因素Logistic回归分析结果显示,PD⁃L1、CD4^(+)、NK细胞和Tregs含量是预测非小细胞肺癌PD⁃1抑制剂临床疗效及预后的独立危险因素(OR=3.540、0.443、0.474、0.491,P<0.05)。结论通过分析老年非小细胞肺癌患者的淋巴细胞亚群水平,可以指导PD⁃1抑制剂疗效的判断,PD⁃L1、CD4^(+)、NK细胞和Tregs含量是预测非小细胞肺癌PD⁃1抑制剂临床疗效及预后的独立危险因素。 展开更多
关键词 非小细胞肺癌 淋巴细胞 pd⁃1抑制剂 临床疗效 预后
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基于PD-滑模耦合算法的压电智能薄板颤振抑制
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作者 宋清华 李振民 +1 位作者 杨欣宇 马海峰 《航空制造技术》 CSCD 北大核心 2024年第1期28-37,共10页
针对工件柔性主导的薄壁件铣削颤振问题,提出了一种基于PD–滑模耦合算法的压电智能薄板颤振抑制方法。首先设计了只需位移测量的主动控制算法,基于滑模控制理论处理系统参数不确定性和外部扰动,通过动态补偿器对未知切削状态进行在线... 针对工件柔性主导的薄壁件铣削颤振问题,提出了一种基于PD–滑模耦合算法的压电智能薄板颤振抑制方法。首先设计了只需位移测量的主动控制算法,基于滑模控制理论处理系统参数不确定性和外部扰动,通过动态补偿器对未知切削状态进行在线近似和补偿;为解决传感误差和系统时滞问题,在滑模控制器中进一步耦合了时空依变PD控制模型,借助ABAQUS仿真拟合控制参数时变函数;最后设计了一套薄壁件主动控制装置,试验结果显示采用主动控制可有效抑制薄壁件铣削颤振,验证了控制方法的可行性。 展开更多
关键词 pd控制 颤振 滑模控制 铣削 压电智能薄板 主动控制
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EZH2抑制剂对恶性淋巴瘤细胞放疗抵抗、Th细胞分化及PD1/PD-L1表达的作用机制
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作者 王钧 王轶楠 +1 位作者 肖建波 李海丽 《中国老年学杂志》 CAS 北大核心 2024年第4期888-892,共5页
目的探究Zeste基因增强子同源物(EZH)2抑制剂对恶性淋巴瘤细胞放疗抵抗、Th细胞分化及程序性死亡(PD)1/PD1配体(PD-L1)表达的作用机制。方法取对数生长恶性淋巴瘤放疗抵抗细胞株将其分为恶性淋巴瘤(A)组、多柔比星(B)组、EZH2抑制剂(C)... 目的探究Zeste基因增强子同源物(EZH)2抑制剂对恶性淋巴瘤细胞放疗抵抗、Th细胞分化及程序性死亡(PD)1/PD1配体(PD-L1)表达的作用机制。方法取对数生长恶性淋巴瘤放疗抵抗细胞株将其分为恶性淋巴瘤(A)组、多柔比星(B)组、EZH2抑制剂(C)组、EZH2抑制剂联合PD1/PD-L1抑制剂(D)组,酶联免疫吸附试验(ELISA)及流式细胞仪检测Th细胞分化相关因子,Western印迹检测PD1/PD-L1蛋白表达,Hoechst33258染色法、噻唑蓝(MTT)法及小室法检测恶性淋巴瘤细胞活性。结果与A组相比,B、C、D组细胞凋亡率、干扰素(INF)-γ水平明显升高,细胞增殖率、侵袭数量、白细胞介素(IL)-4水平、PD1、PD-L1蛋白表达明显降低(P<0.05),且C组比B组变化更明显,D组比C组变化更明显(P<0.05)。结论EZH2抑制剂可显著抑制恶性淋巴瘤细胞放疗抵抗,有效调控Th细胞分化,并抑制PD1/PD-L1蛋白表达。 展开更多
关键词 Zeste基因增强子同源物(EZH)2抑制剂 恶性淋巴瘤细胞 放疗抵抗 TH细胞分化 程序性死亡(pd)1/pd1配体(pd-L1)
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Pd-ZSM-5复合膜的制备及其氢气分离性能
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作者 郭宇 戴耀城 吴红梅 《南京工业大学学报(自然科学版)》 CAS 北大核心 2024年第2期160-169,共10页
为了能够在大孔氧化铝载体表面得到透氢性能良好的钯膜,利用二次生长法在多孔Al_(2)O_(3)载体上生长出一层连续完整的ZSM-5沸石分子筛修饰层,通过化学镀过程在ZSM-5沸石分子筛修饰的载体上沉积一层钯膜,从而得到Pd-ZSM-5复合膜。利用扫... 为了能够在大孔氧化铝载体表面得到透氢性能良好的钯膜,利用二次生长法在多孔Al_(2)O_(3)载体上生长出一层连续完整的ZSM-5沸石分子筛修饰层,通过化学镀过程在ZSM-5沸石分子筛修饰的载体上沉积一层钯膜,从而得到Pd-ZSM-5复合膜。利用扫描电子显微镜(SEM)对载体、ZSM-5沸石分子筛修饰后的载体和Pd-ZSM-5复合膜的形貌进行详细分析,并通过X线能量色散光谱(EDX)对Pd-ZSM-5复合膜的表面和截面元素分布进行了研究。而且,为了确定该Pd-ZSM-5复合膜的H_(2)渗透性能,在623~773 K范围内,研究了操作温度、操作时间和测试压力对Pd-ZSM-5复合膜透氢性能的影响。研究结果表明,ZSM-5沸石分子筛修饰层能够有效改进载体的表面粗糙度和降低其表面孔径,有助于Pd膜的沉积。所制备的Pd-ZSM-5复合膜表面完整、致密,Pd膜层厚度约为5μm, ZSM-5沸石修饰层厚度约为3μm。当操作温度为773 K、渗透压力为0.1 MPa时,Pd-ZSM-5复合膜的H_(2)渗透通量和H_(2)/N_(2)渗透选择性分别为0.113 mol/(m·s)和468。而且,该Pd复合膜在773 K下,连续操作300 h后,其H_(2)渗透性能保持相对稳定。 展开更多
关键词 pd 沸石分子筛 化学镀 多孔载体 氢气分离
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PD1联合安罗替尼治疗复发难治胸腺癌1例
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作者 王娜 王凯 +3 位作者 曹向荣 姜金 吴萌 宋飞雪 《甘肃医药》 2024年第6期573-576,共4页
胸腺癌是一种发病率相对较低的恶性肿瘤,其临床表现、治疗及预后不同于胸腺瘤,易转移到淋巴结及胸外其他部位,胸腺癌具有较强的侵袭性。晚期胸腺癌治疗方案有限,以内科治疗为主,但对化疗不敏感,疗效欠佳。一线化疗失败后,二线治疗方案... 胸腺癌是一种发病率相对较低的恶性肿瘤,其临床表现、治疗及预后不同于胸腺瘤,易转移到淋巴结及胸外其他部位,胸腺癌具有较强的侵袭性。晚期胸腺癌治疗方案有限,以内科治疗为主,但对化疗不敏感,疗效欠佳。一线化疗失败后,二线治疗方案目前证据较少,NCCN推荐的药物主要有舒尼替尼、培美曲塞、依维莫司、紫杉醇、奥曲肽(长效;LAR)联合或者不联合泼尼松、吉西他滨、5-FU、依托泊苷和异环磷酰胺等,缓解率大约为4%~21%,而且二线治疗药物临床使用疗效欠佳。免疫检查点抑制剂在胸腺癌的后线治疗中有少量病例探索,但证据级别不高,本例个案报道为一例晚期胸腺癌多线治疗失败的患者使用免疫联合抗血管治疗的疗效观察。 展开更多
关键词 胸腺癌 pd1 免疫治疗 安罗替尼
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血清中PD-L1含量与胃癌病人预后的关系
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作者 陈长强 严晓伟 +3 位作者 胡皆乐 包皙婷 项明 姜松耀 《外科理论与实践》 2024年第3期230-235,共6页
目的:分析胃癌病人血清中程序性死亡配体1(programmed death-ligand 1,PD-L1)含量及其与肿瘤分期和预后的关系。方法:收集我院2018年8月至2019年12月60例胃癌病人血清,15例健康成人血清作为对照,通过酶联免疫吸附试验(ELISA)检测血清PD... 目的:分析胃癌病人血清中程序性死亡配体1(programmed death-ligand 1,PD-L1)含量及其与肿瘤分期和预后的关系。方法:收集我院2018年8月至2019年12月60例胃癌病人血清,15例健康成人血清作为对照,通过酶联免疫吸附试验(ELISA)检测血清PD-L1的含量,比较胃癌病人与健康成人血清PD-L1含量的差异,分析胃癌病人血清PD-L1的含量与病期及预后的关系。免疫组织化学检测肿瘤组织内PD-L1的表达情况,并分析其与血清中PD-L1含量的相关性。结果:胃癌组血清中PD-L1的含量明显高于对照组。Ⅲ、Ⅳ期胃癌病人血清PD-L1含量明显高于Ⅰ、Ⅱ期胃癌病人。胃癌病人合并腹膜转移者血清PD-L1含量明显升高,提示预后不良。生存分析显示,血清PD-L1含量高的胃癌病人生存期明显短于低者。检测肿瘤组织标本中PD-L1的表达水平,发现其与血清中PD-L1含量无明显相关性。结论:胃癌病人血清中PD-L1含量高于健康成人。随病期进展逐渐升高。胃癌伴腹膜转移的病人血清中PD-L1升高明显。血清中PD-L1含量与肿瘤组织中的PD-L1表达不相关。 展开更多
关键词 胃癌 程序性死亡配体1 血清
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鸢尾素调节PD-1/PD-L1通路增强病毒性心肌炎小鼠的抗病毒免疫水平
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作者 谭冠文 朱朱 周文静 《中国免疫学杂志》 CAS CSCD 北大核心 2024年第9期1876-1882,共7页
目的:探讨鸢尾素调节程序性死亡因子-1(PD-1)/程序性死亡因子配体-1(PD-L1)通路增强病毒性心肌炎小鼠抗病毒免疫水平的作用。方法:取50只C57BL/6小鼠经腹腔接种柯萨奇病毒B3(CVB3)构建病毒性心肌炎小鼠模型,将建模成功小鼠随机分为模型... 目的:探讨鸢尾素调节程序性死亡因子-1(PD-1)/程序性死亡因子配体-1(PD-L1)通路增强病毒性心肌炎小鼠抗病毒免疫水平的作用。方法:取50只C57BL/6小鼠经腹腔接种柯萨奇病毒B3(CVB3)构建病毒性心肌炎小鼠模型,将建模成功小鼠随机分为模型组、鸢尾素低、中、高剂量组和阳性对照组,另取10只C57BL/6小鼠记为空白对照组。阳性对照组经腹腔注射给予10000 U/g干扰素,鸢尾素低、中、高剂量组经腹腔注射给予30、60、120μg/kg鸢尾素,空白对照组和阳性对照组均给予等量生理盐水,1次/d,共2周。HE染色观察小鼠心肌组织病理改变情况;空斑形成单位(PFU)法检测小鼠心肌组织的病毒滴度;流式细胞术检测小鼠外周血T淋巴细胞亚群(CD4^(+)T、CD8^(+)T、NK细胞)比例和CD4^(+)T/CD8^(+)T;ELISA检测小鼠心肌组织中炎症细胞因子IL-6、IL-17、TNF-α和IFN-γ水平;RT-qPCR检测小鼠T淋巴细胞PD-1及心肌组织PD-L1 mRNA表达;West?ern blot检测小鼠T淋巴细胞PD-1及心肌组织PD-L1蛋白表达。结果:与空白对照组相比,模型组小鼠心肌组织结构改变明显,有大量炎症细胞浸润和成片灶性坏死,心肌组织的病理积分、病毒滴度、炎症细胞因子IL-6、IL-17、TNF-α、IFN-γ水平和PDL1 mRNA及蛋白表达升高,外周血CD8^(+)T淋巴细胞比例及T淋巴细胞PD-1 mRNA及蛋白表达升高,外周血CD4^(+)T淋巴细胞、NK细胞比例及CD4^(+)T/CD8^(+)T降低,差异均有统计学意义(P<0.05);与模型组相比,阳性对照组和鸢尾素低、中、高剂量组心肌组织病变情况均有不同程度减轻,心肌组织的病理积分、病毒滴度、炎症细胞因子IL-6、IL-17、TNF-α、IFN-γ水平和PD-L1mRNA及蛋白表达降低,外周血CD8^(+)T淋巴细胞比例及T淋巴细胞PD-1 mRNA及蛋白表达降低,外周血CD4^(+)T淋巴细胞、NK细胞比例及CD4^(+)T/CD8^(+)T升高,其中鸢尾素作用呈剂量依赖性,差异均有统计学意义(P<0.05)。结论:鸢尾素具有增强病毒性心肌炎小鼠抗病毒免疫水平作用,推测是通过抑制PD-1/PD-L1通路激活,改善小鼠外周血T淋巴细胞亚群比例失调,提高机体免疫功能实现的。 展开更多
关键词 鸢尾素 程序性死亡因子-1 病毒性心肌炎 抗病毒免疫
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