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Age-specific differences in the association between prediabetes and cardiovascular diseases in China:A national cross-sectional study 被引量:1
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作者 Shuo Xie Li-Ping Yu +4 位作者 Fei Chen Yao Wang Rui-Fen Deng Xue-Lian Zhang Bo Zhang 《World Journal of Diabetes》 SCIE 2024年第2期240-250,共11页
BACKGROUND Cardiovascular disease(CVD)is a leading cause of morbidity and mortality worldwide,the global burden of which is rising.It is still unclear the extent to which prediabetes contributes to the risk of CVD in ... BACKGROUND Cardiovascular disease(CVD)is a leading cause of morbidity and mortality worldwide,the global burden of which is rising.It is still unclear the extent to which prediabetes contributes to the risk of CVD in various age brackets among adults.To develop a focused screening plan and treatment for Chinese adults with prediabetes,it is crucial to identify variations in the connection between prediabetes and the risk of CVD based on age.AIM To examine the clinical features of prediabetes and identify risk factors for CVD in different age groups in China.METHODS The cross-sectional study involved a total of 46239 participants from June 2007 through May 2008.A thorough evaluation was conducted.Individuals with prediabetes were categorized into two groups based on age.Chinese atherosclerotic CVD risk prediction model was employed to evaluate the risk of developing CVD over 10 years.Random forest was established in both age groups.SHapley Additive exPlanation method prioritized the importance of features from the perspective of assessment contribution.RESULTS In total,6948 people were diagnosed with prediabetes in this study.In prediabetes,prevalences of CVD were 5(0.29%)in the younger group and 148(2.85%)in the older group.Overall,11.11%of the younger group and 29.59% of the older group were intermediate/high-risk of CVD for prediabetes without CVD based on the Prediction for ASCVD Risk in China equation in ten years.In the younger age group,the 10-year risk of CVD was found to be more closely linked to family history of CVD rather than lifestyle,whereas in the older age group,resident status was more closely linked.CONCLUSION The susceptibility to CVD is age-specific in newly diagnosed prediabetes.It is necessary to develop targeted approaches for the prevention and management of CVD in adults across various age brackets. 展开更多
关键词 Age Cardiovascular diseases prediabetes Risk factors DIFFERENCES
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Prediabetes: An overlooked risk factor for major adverse cardiac and cerebrovascular events in atrial fibrillation patients 被引量:2
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作者 Rupak Desai Nishanth Katukuri +9 位作者 Sumaja Reddy Goguri Azra Kothawala Naga Ruthvika Alle Meena Kumari Bellamkonda Debankur Dey Sharmila Ganesan Minakshi Biswas Kuheli Sarkar Pramoda Prattipati Shaylika Chauhan 《World Journal of Diabetes》 SCIE 2024年第1期24-33,共10页
BACKGROUND Prediabetes is a well-established risk factor for major adverse cardiac and cerebrovascular events(MACCE).However,the relationship between prediabetes and MACCE in atrial fibrillation(AF)patients has not be... BACKGROUND Prediabetes is a well-established risk factor for major adverse cardiac and cerebrovascular events(MACCE).However,the relationship between prediabetes and MACCE in atrial fibrillation(AF)patients has not been extensively studied.Therefore,this study aimed to establish a link between prediabetes and MACCE in AF patients.AIM To investigate a link between prediabetes and MACCE in AF patients.METHODS We used the National Inpatient Sample(2019)and relevant ICD-10 CM codes to identify hospitalizations with AF and categorized them into groups with and without prediabetes,excluding diabetics.The primary outcome was MACCE(all-cause inpatient mortality,cardiac arrest including ventricular fibrillation,and stroke)in AF-related hospitalizations.RESULTS Of the 2965875 AF-related hospitalizations for MACCE,47505(1.6%)were among patients with prediabetes.The prediabetes cohort was relatively younger(median 75 vs 78 years),and often consisted of males(56.3%vs 51.4%),blacks(9.8%vs 7.9%),Hispanics(7.3%vs 4.3%),and Asians(4.7%vs 1.6%)than the non-prediabetic cohort(P<0.001).The prediabetes group had significantly higher rates of hypertension,hyperlipidemia,smoking,obesity,drug abuse,prior myocardial infarction,peripheral vascular disease,and hyperthyroidism(all P<0.05).The prediabetes cohort was often discharged routinely(51.1%vs 41.1%),but more frequently required home health care(23.6%vs 21.0%)and had higher costs.After adjusting for baseline characteristics or comorbidities,the prediabetes cohort with AF admissions showed a higher rate and significantly higher odds of MACCE compared to the non-prediabetic cohort[18.6%vs 14.7%,odds ratio(OR)1.34,95%confidence interval 1.26-1.42,P<0.001].On subgroup analyses,males had a stronger association(aOR 1.43)compared to females(aOR 1.22),whereas on the race-wise comparison,Hispanics(aOR 1.43)and Asians(aOR 1.36)had a stronger association with MACCE with prediabetes vs whites(aOR 1.33)and blacks(aOR 1.21).CONCLUSION This population-based study found a significant association between prediabetes and MACCE in AF patients.Therefore,there is a need for further research to actively screen and manage prediabetes in AF to prevent MACCE. 展开更多
关键词 prediabetes Atrial fibrillation Cardiovascular disease risk Major adverse cardiovascular and cerebrovascular events Stroke MORTALITY
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Metabolic disorders in prediabetes:From mechanisms to therapeutic management 被引量:1
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作者 Wen-Xin Ping Shan Hu +1 位作者 Jing-Qian Su Song-Ying Ouyang 《World Journal of Diabetes》 SCIE 2024年第3期361-377,共17页
Diabetes,one of the world's top ten diseases,is known for its high mortality and complication rates and low cure rate.Prediabetes precedes the onset of diabetes,during which effective treatment can reduce diabetes... Diabetes,one of the world's top ten diseases,is known for its high mortality and complication rates and low cure rate.Prediabetes precedes the onset of diabetes,during which effective treatment can reduce diabetes risk.Prediabetes risk factors include high-calorie and high-fat diets,sedentary lifestyles,and stress.Consequences may include considerable damage to vital organs,including the retina,liver,and kidneys.Interventions for treating prediabetes include a healthy lifestyle diet and pharmacological treatments.However,while these options are effective in the short term,they may fail due to the difficulty of long-term implementation.Medications may also be used to treat prediabetes.This review examines prediabetic treatments,particularly metformin,glucagon-like peptide-1 receptor agonists,sodium glucose cotransporter 2 inhibitors,vitamin D,and herbal medicines.Given the remarkable impact of prediabetes on the progression of diabetes mellitus,it is crucial to intervene promptly and effectively to regulate prediabetes.However,the current body of research on prediabetes is limited,and there is considerable confusion surrounding clinically relevant medications.This paper aims to provide a comprehensive summary of the pathogenesis of prediabetes mellitus and its associated therapeutic drugs.The ultimate goal is to facilitate the clinical utilization of medications and achieve efficient and timely control of diabetes mellitus. 展开更多
关键词 prediabetes Glucagon-like peptide agonists Sodium–glucose cotransporter 2 inhibitors Vitamin D Chinese herbal medicines
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Atrial fibrillation and prediabetes:A liaison that merits attention! 被引量:1
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作者 Akash Batta Juniali Hatwal 《World Journal of Diabetes》 SCIE 2024年第7期1645-1647,共3页
Atrial fibrillation(AF)and prediabetes share common pathophysiological mechanisms with endothelial dysfunction and inflammation playing a key role.The resultant vicious cycle which sets in culminates in a higher ather... Atrial fibrillation(AF)and prediabetes share common pathophysiological mechanisms with endothelial dysfunction and inflammation playing a key role.The resultant vicious cycle which sets in culminates in a higher atherogenicity and thermogenicity of the vascular system resulting in increased major adverse cardiac or cerebrovascular event(MACCE)events.However,the same has not convincingly been verified in real-world settings.In the recent retrospective study by Desai et al amongst AF patients being admitted to hospitals following MACCE,prediabetes emerged as an independent risk factor for MACCE after adjusting for all confounding variables.However,certain questions like the role of metformin,quantifying the risk for MACCE amongst prediabetes compared to diabetes,the positive impact of reversion to normoglycemia remain unanswered.We provide our insights and give future directions for dedicated research in this area to clarify the exact relationship between the two. 展开更多
关键词 Atrial fibrillation Major adverse cardiac or cerebrovascular event prediabetes Diabetes Stroke Heart failure DYSGLYCEMIA METFORMIN
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Atrial fibrillation and prediabetes:Interplay between left atrium and systemic diseases
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作者 Ming-Jui Hung 《World Journal of Diabetes》 SCIE 2024年第11期2242-2244,共3页
Atrial fibrillation(AF)is associated with multiple other comorbidities,i.e.multimorbidity.Prediabetes is one of the multiple comorbidities observed in patients with AF,whereby these two disease entities share the same... Atrial fibrillation(AF)is associated with multiple other comorbidities,i.e.multimorbidity.Prediabetes is one of the multiple comorbidities observed in patients with AF,whereby these two disease entities share the same pathophysiological mechanisms,namely oxidative stress and inflammation.Although prediabetes is reported to have a negative impact on major adverse cardiac or cerebrovascular events in hospitalized AF patients,information about the interactions between prediabetes and AF remains inconsistent.A more in-depth exploration of pathophysiology and more comprehensive prospective clinical studies of AF and diabetes would provide a thorough understanding of the timing of events and further treatment strategies.Deeper investigations are needed to clarify the interactions and causal relationships between AF and prediabetes. 展开更多
关键词 Atrial fibrillation Endothelial dysfunction INFLAMMATION prediabetes STROKE
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Prevalence and impact of diabetes and prediabetes on presentation and complications of primary hyperaldosteronism at diagnosis
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作者 Debmalya Sanyal Pradip Mukhopadhyay Sujoy Ghosh 《World Journal of Clinical Cases》 SCIE 2024年第18期3332-3339,共8页
BACKGROUND Primary hyperaldosteronism(PH)is considered to contribute to increased risk of developing type 2 diabetes mellitus(T2DM)and prediabetes.Both PH and DM are associated with increased risk for hypertension,car... BACKGROUND Primary hyperaldosteronism(PH)is considered to contribute to increased risk of developing type 2 diabetes mellitus(T2DM)and prediabetes.Both PH and DM are associated with increased risk for hypertension,cardiovascular diseases,and chronic kidney diseases.However,data on prevalence of T2DM and prediabetes in PH,and impact of T2DM and prediabetes on presentation and cardio renal complications in PH at presentation is sparse.AIM To determine the prevalence of T2DM and prediabetes in PH at diagnosis and impact on presentation and complications of PH.METHODS A retrospective cohort study was conducted in tertiary care settings in individuals with confirmed diagnosis of PH at presentation.Demographic variables,clinical presentations,duration and degree of hypertension,complications,laboratory parameters including sodium,potassium levels,plasma aldosterone concentration(PAC),plasma renin activity(PRA),and aldosterone to renin ratio(ARR)and cardio-renal parameters were collected.Comparison was done between three groups:PH with no DM(Group A)or with pre-diabetes(Group B)or with T2DM(Group C).P<0.05 was statistically significant.RESULTS Among 78 individuals with confirmed PH,62%had pre-diabetes or diabetes;with 37%having DM.Mean duration of T2DM was 5.97±4.7 years.The mean levels of glycaemic parameters among the group A vs B vs C individuals were fasting plasma glucose(mg/dL):87.9±6.5,105.4±9.02,130.6±21.1;post prandial plasma glucose(mg/dL):122.7±9.8,154.9±14,196.7±38.0;glycated haemoglobin(%)(5.3±0.2,5.9±0.2,7.5±0.6,P<0.05),respectively.There was no significant difference in the biochemical parameters(PAC,PRA,ARR,sodium,potassium levels),presentation and complications between the groups.Cardio renal parameters or degree and duration of hypertension were comparable between the groups.CONCLUSION Significant prevalence of T2DM and prediabetes in PH at diagnosis does not impact its presentation or complications.Early screening for undetected PH in T2DM and prediabetes subjects with hypertension may prevent complications. 展开更多
关键词 Primary hyperaldosteronism DIABETES prediabetes HYPERTENSION ALDOSTERONE Aldosterone to renin ratio
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Age-specific heterogeneity of genetic susceptibility to cardiovascular disease might have opposite outcomes depending on the presence of prediabetes
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作者 Chaeyoung Lee 《World Journal of Diabetes》 SCIE 2024年第6期1381-1383,共3页
Examining age-specific heterogeneity of susceptibility to cardiovascular disease is also essential in individuals without prediabetes to determine its relative size and direction compared to those with prediabetes.Of ... Examining age-specific heterogeneity of susceptibility to cardiovascular disease is also essential in individuals without prediabetes to determine its relative size and direction compared to those with prediabetes.Of particular interest,age-specific heterogeneity in genetic susceptibility may exhibit opposite directions depending on the presence or absence of prediabetes. 展开更多
关键词 Age-specific difference Cardiovascular disease Genetic heterogeneity by age Genetic susceptibility prediabetes
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Prediabetes in children and adolescents:A ticking bomb!
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作者 Anju Gupta Nitin Choudhary Nishkarsh Gupta 《World Journal of Clinical Pediatrics》 2024年第2期11-15,共5页
Prediabetes in children and adolescents is on the rise which has drawn significant attention over the past decade.It is an early warning sign of the underlying pathophysiological changes which in due course of time mi... Prediabetes in children and adolescents is on the rise which has drawn significant attention over the past decade.It is an early warning sign of the underlying pathophysiological changes which in due course of time might compound into type II diabetes mellitus.The incidence of prediabetes in adolescents ranges from 4%-23%which is alarmingly high and requires active intervention from the system.We have discussed early identification of high-risk patients,prompt screening and active intervention to manage this growing problem. 展开更多
关键词 prediabetes CHILDREN Adolescents Glucose metabolism COMPLICATIONS
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Prediabetes in children and adolescents:An updated review 被引量:2
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作者 Hak Yung Ng Louis Tsz Wang Chan 《World Journal of Clinical Pediatrics》 2023年第5期263-272,共10页
Prediabetes,the precursor of type 2 diabetes mellitus,is an intermediate stage between normal glucose homeostasis and overt diabetes.This asymptomatic metabolic state is increasingly prevalent in pediatric population ... Prediabetes,the precursor of type 2 diabetes mellitus,is an intermediate stage between normal glucose homeostasis and overt diabetes.This asymptomatic metabolic state is increasingly prevalent in pediatric population and is very difficult to detect without appropriate screening.Studies have shown that a certain proportion of children with prediabetes will develop diabetes in a few years.Even more alarming is the evidence that youth-onset diabetes has a more aggressive clinical course with progressive beta-cell decline and accelerated endorgan damage.Despite its importance,several aspects involving prediabetes in childhood are disputed or unknown.This review presents the latest insights into this challenging entity and outlines a simplified screening approach to aid clinical practice.In summary,childhood prediabetes is an important clinical condition indicating the need for proper screening and timely intervention. 展开更多
关键词 prediabetes SCREENING DIAGNOSIS Management OBESITY Type 2 diabetes mellitus CHILDREN
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A Machine Learning Classification Model for Detecting Prediabetes
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作者 A. K. M. Raquibul Bashar Mahdi Goudarzi Chris P. Tsokos 《Journal of Data Analysis and Information Processing》 2024年第3期462-478,共17页
The incidence of prediabetes is in a dangerous condition in the USA. The likelihood of increasing chronic and complex health issues is very high if this stage of prediabetes is ignored. So, early detection of prediabe... The incidence of prediabetes is in a dangerous condition in the USA. The likelihood of increasing chronic and complex health issues is very high if this stage of prediabetes is ignored. So, early detection of prediabetes conditions is critical to decrease or avoid type 2 diabetes and other health issues that come as a result of untreated and undiagnosed prediabetes condition. This study is done in order to detect the prediabetes condition with an artificial intelligence method. Data used for this study is collected from the Centers for Disease Control and Prevention’s (CDC) survey conducted by the Division of Health and Nutrition Examination Surveys (DHANES). In this study, several machine learning algorithms are exploited and compared to determine the best algorithm based on Average Squared Error (ASE), Kolmogorov-Smirnov (Youden) scores, areas under the ROC and some other measures of the machine learning algorithm. Based on these scores, the champion model is selected, and Random Forest is the champion model with approximately 89% accuracy. 展开更多
关键词 prediabetes Machine Learning SVM FOREST Cumulative Lift
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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-ZSM-5复合膜的制备及其氢气分离性能 被引量:1
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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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CRISPR/CAS9敲除PD-1的肿瘤浸润T淋巴细胞回输对小鼠结肠癌的治疗作用 被引量:1
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作者 瞿紫微 李晓辉 +3 位作者 郭建辉 陈华涛 吴彪 孟庆彬 《中国免疫学杂志》 CAS CSCD 北大核心 2024年第6期1189-1196,共8页
目的:探讨应用成簇规律间隔的短回文重复序列及其相关蛋白(CRISPR/Cas9)技术敲除程序性死亡分子-1(PD-1)的肿瘤浸润淋巴细胞(TIL)回输对结肠癌小鼠的治疗作用。方法:皮下注射CT26构建小鼠结肠癌模型,从3只模型小鼠肿瘤组织中提取TIL,并... 目的:探讨应用成簇规律间隔的短回文重复序列及其相关蛋白(CRISPR/Cas9)技术敲除程序性死亡分子-1(PD-1)的肿瘤浸润淋巴细胞(TIL)回输对结肠癌小鼠的治疗作用。方法:皮下注射CT26构建小鼠结肠癌模型,从3只模型小鼠肿瘤组织中提取TIL,并提取外周血淋巴细胞;对TIL进行PD-1基因敲除;回输实验分为对照组(Control)、输注淋巴细胞组(Lym)、输注荷瘤小鼠TIL组(TIL)、慢病毒空载对照组(pVSV-G-PX458-NC)组、PX458-PD-1-sgRNA1组(PD-1-sgRNA1),每组10只;测量各组小鼠肿瘤组织质量及肿瘤抑制率;TUNEL法检测各组小鼠肿瘤组织细胞凋亡;ELISA检测各组小鼠肿瘤组织TNF-α和IFN-γ含量;免疫组化检测肿瘤组织CD4+T、CD8+T细胞表达;免疫荧光法检测肿瘤组织细胞增殖核抗原-67(Ki-67)和血管内皮生长因子(VEGF)表达;Western blot检测肿瘤组织PD-1及其主要配体PD-L1表达。结果:PD-1-sgRNA1能明显抑制小鼠肿瘤细胞体内生长,抑制肿瘤组织Ki-67和VEGF表达及PD-1、PD-L1表达,提高肿瘤组织细胞凋亡率、TNF-α、IFN-γ含量、CD4+T、CD8+T细胞表达(均P<0.05)。结论:CRISPR/CAS9敲除PD-1的TIL回输能明显抑制结肠癌小鼠肿瘤组织Ki-67和VEGF表达,增加CD4+T、CD8+T细胞,诱导肿瘤细胞凋亡,发挥抑制肿瘤生长作用。 展开更多
关键词 CRISPR/Cas9 pd-1 结肠癌 肿瘤浸润淋巴细胞 肿瘤生长
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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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侧链含吡啶聚三噻吩/rGO/Pd复合材料的制备及甲醇电催化氧化性能
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作者 阿布都克尤木·阿布都热西提 王景阳 +7 位作者 艾合买提·沙塔尔 姚雪 如仙古丽·加玛力 宁可 张翰林 胡立坤 牛朝阳 周学广 《高分子材料科学与工程》 EI CAS CSCD 北大核心 2024年第9期1-8,共8页
以D-A结构的3-吡啶基-2,5-二噻基噻吩为单体,调节单体与还原氧化石墨烯的配比,通过原位溶液聚合修饰还原氧化石墨烯(rGO),制备了催化剂载体polymer/rGO_(80%)和polymer/rGO_(50%)复合物。然后将Pd纳米粒子负载到rGO,polymer/rGO_(80%)和... 以D-A结构的3-吡啶基-2,5-二噻基噻吩为单体,调节单体与还原氧化石墨烯的配比,通过原位溶液聚合修饰还原氧化石墨烯(rGO),制备了催化剂载体polymer/rGO_(80%)和polymer/rGO_(50%)复合物。然后将Pd纳米粒子负载到rGO,polymer/rGO_(80%)和polymer/rGO_(50%)上,制备了rGO/Pd,polymer/rGO_(80%)/Pd和polymer/rGO_(50%)/Pd电催化剂。通过红外光谱、扫描电镜、透射电镜及电感耦合等离子体发射光谱对电催化剂进行表征,并采用循环伏安和计时电流等电化学测试方法对电催化剂的甲醇电催化氧化性能进行了研究。结果表明,rGO/Pd,polymer/rGO_(80%)/Pd和polymer/rGO_(50%)/Pd在0.5 mol/L KOH溶液中的电化学活性表面积分别为195.2 cm^(2)/mg,280.1 cm^(2)/mg和428.1 cm^(2)/mg;rGO/Pd,polymer/rGO_(80%)/Pd和polymer/rGO_(50%)/Pd在0.5 mol/L KOH+1 mol/L CH3OH体系中甲醇电催化氧化峰电流密度分别为235.31 mA/mg,783.83 mA/mg和1146.36 mA/mg,与rGO/Pd相比,polymer/rGO_(80%)/Pd和polymer/rGO_(50%)/Pd的电催化活性分别为rGO/Pd的3.3倍和4.9倍,表明聚合物在复合物中的最佳质量分数为50%。侧链含吡啶聚三噻吩修饰rGO,可以增强rGO/Pd电催化剂的电催化性能和电催化稳定性。 展开更多
关键词 聚三噻吩衍生物 D-A结构 甲醇电催化氧化 pd基电催化剂
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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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