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重症急性胰腺炎的早期液体复苏和器官保护

中国实用外科杂志 2024年第5期44卷 524-529页

作者：李双玲谢旻杨尹默北京大学第一医院重症医学科北京100034 北京大学第一医院肝胆胰外科北京100034

液体复苏和器官功能保护是重症急性胰腺炎(SAP)早期治疗的2个关键环节。一旦诊断为SAP应立即开始液体复苏,尤其合并休克或脱水的病人。平衡液是复苏首选液体,常用乳酸林格液;接受大量晶体液时可使用白蛋白。液体复苏的起始液体速率和剂... 详细信息

液体复苏和器官功能保护是重症急性胰腺炎(SAP)早期治疗的2个关键环节。一旦诊断为SAP应立即开始液体复苏,尤其合并休克或脱水的病人。平衡液是复苏首选液体,常用乳酸林格液;接受大量晶体液时可使用白蛋白。液体复苏的起始液体速率和剂量需结合复苏目标和监测来定,进行滴定式液体复苏,需遵循个体化、精准化、限制性原则,充分复苏的同时避免液体过负荷。SAP早期器官功能障碍强调早期发现、干预并保护性治疗,以防止多器官功能障碍的发生和进展。预防重于治疗,早期以ICU为主导的监测、适当的液体复苏、器官功能支持和内科综合治疗更为重要。具体措施包括及时的病因治疗、早期液体复苏和循环支持、调节炎性反应、改善肠道屏障功能、血液净化治疗、呼吸早期支持、肾脏支持、抗凝、脑保护、感染控制、镇痛镇静等。

关键词：重症急性胰腺炎液体复苏器官保护器官功能障碍

从技术到策略——2023年胰腺癌治疗热点聚焦

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中国实用外科杂志 2024年第1期44卷 74-78页

作者：刘光年田孝东杨尹默北京大学第一医院肝胆胰外科北京100034

胰腺癌在所有消化道肿瘤中预后最差。系统治疗背景下胰腺癌多学科综合诊治模式的开展,对胰腺外科产生了深远影响。外科技术方面进步巨大,手术安全性、切除率显著提高,微创手术逐步成为胰腺外科未来发展的趋势。新辅助治疗日趋普及与规范... 详细信息

胰腺癌在所有消化道肿瘤中预后最差。系统治疗背景下胰腺癌多学科综合诊治模式的开展,对胰腺外科产生了深远影响。外科技术方面进步巨大,手术安全性、切除率显著提高,微创手术逐步成为胰腺外科未来发展的趋势。新辅助治疗日趋普及与规范,逐步成为交界可切除及局部进展期胰腺癌病人的标准化治疗模式。免疫和靶向治疗等相关探索曙光初现,但尚乏敏感靶点,为免疫“冷肿瘤”表现。胰腺癌基础研究亟待突破与转化,生物学认知的深入与正确的肿瘤学评价是指导临床决策与改善胰腺癌病人远期预后的根本路径。

关键词：胰腺癌胰十二指肠切除术新辅助治疗免疫治疗分子分型

双耳分听模式下汉语语言信号和韵律信号的处理:一项fMRI研究

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磁共振成像 2024年第2期15卷 115-121页

作者：徐紫薇莫茵史尧平蔡希睿昆明医科大学第一附属医院医学影像科昆明650000 常德市第一人民医院医学影像科常德415000 昆明医科大学外语部昆明650500

目的为了探讨汉语为母语者在处理双耳分听模式下汉语听觉信号的脑区分布特征及偏侧化特点,本研究利用低通过滤的方法获取韵律信号,结合双耳分听技术,通过脑功能磁共振成像得到汉语语言和韵律双耳分听信号的神经处理模型。材料与方法从2... 详细信息

目的为了探讨汉语为母语者在处理双耳分听模式下汉语听觉信号的脑区分布特征及偏侧化特点,本研究利用低通过滤的方法获取韵律信号,结合双耳分听技术,通过脑功能磁共振成像得到汉语语言和韵律双耳分听信号的神经处理模型。材料与方法从2022年1月至5月在昆明医科大学第一附属医院共招募30位志愿者,年龄(25.36±0.88)岁,汉语为母语,强右利手者。汉语短句音频信号通过低通滤波器,只保留低频率语言韵律信号(<320 Hz),并得到两组双耳分听语音信号:左耳低通过滤右耳不过滤组(filtered in the left ear and unfiltered in the right ear,FL);右耳低通过滤左耳不过滤组(filtered in the right ear and unfiltered in the left ear,FR)。受试者依次聆听两组语音信号,同时进行两组组块设计的脑功能磁共振成像。使用SPM 12软件对得到的影像数据进行预处理后,进行组内单样本t检验、组间双样本t检验,以此观察两组语音信号激活脑区的分布和强度的共性、差异性。根据单样本t检验的统计结果,确定感兴趣区域,计算相应脑区的偏侧化指数,以获得大脑在处理双耳分听模式下的汉语语言和韵律信号时的脑区偏侧化特点。结果两组信号都激活了双侧颞中回、颞上回、额下回,左侧中央前回和右侧额中回(P<0.05,FDR校正);FL信号诱导左侧额中回血氧水平增高(P<0.05,FDR校正);FR信号还激活了双侧顶下小叶(P<0.05,FDR校正)。对两组语音信号进行双样本t检验后,发现FR与FL相比,右侧颞中回、颞上回具有明显差异(P<0.05,FDR校正);FL与FR相比无明显差异性脑区。对两组语音信号进行偏侧化指数计算后发现,在大脑半球水平上两组语音信号无明显的偏侧化表现。两组信号的额中回具有右侧优势,中央前回都表现出左侧化趋势;顶下小叶在FR刺激下呈现左侧化趋势。结论大脑处理两种语音信号时具有一个由双侧颞中回、颞上回、额下回和右侧额中回组成的基础语音处理模型。双耳分听信号FR除激活了基础语音加工脑区外,相较于FL招募了更多的听觉相关脑区参与言语感知和认知控制;FL则可以降低右侧颞中回、颞上回的音韵处理负荷,可能是一种符合左、右两侧半球处理语言、韵律优势的信号。

关键词：听觉语言信号低通过滤韵律双耳分听脑功能磁共振成像磁共振成像

Comprehensive modeling strategy for thermomechanical tribological behavior analysis of railway vehicle disc brake system

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Friction 2024年第1期12卷 74-94页

作者： Jiabao yin Chun LU Jiliang mo School of Mechanical Engineering Southwest Jiaotong UniversityChengdu 610031China Technology and Equipment of Rail Transit Operation and Maintenance Key Laboratory of Sichuan Province Chengdu 610031China

A comprehensive modeling strategy for studying the thermomechanical tribological behaviors is proposed in this *** wear degradation considering the influence of temperature(T)is predicted by Archard wear model with the help of the UMESHmoTION subroutine and arbitrary Lagrangian–Eulerian(ALE)remeshing *** the proposed method,the thermomechanical tribological behaviors of railway vehicle disc brake system composed of forged steel brake disc and Cu-based powder metallurgy(PM)friction block are studied *** effectiveness of the proposed methodology is validated by experimental test on a self-designed scaled brake test bench from the perspectives of interface temperature,wear degradation,friction noise and vibration,and contact status *** work can provide an effective way for the investigation of thermomechanical tribological behaviors in the engineering field.

关键词： tribological behaviors thermomechanical field wear prediction finite element simulation disc brake system railway vehicle

Research on Interest Rate Transmission Mechanism of China’s Bond Market:Empirical Analysis Based on Granger Causality Complex Network

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Journal of Systems Science and Information 2023年第5期11卷 604-621页

作者： Xiao CUI mo yin Kun GUO Yijing WANG School of Economics and Management University of Chinese Academy of SciencesBeijing 100190China Research Center on Fictitious Economy&Data Science Chinese Academy of ScienceBeijing 100190China

The bond market is an important market for investment and financing in China’s economic sectors,and also an important part of the monetary policy *** internal transmission of bond market is an important part of market interest rate transmission,which iscritical to the effectiveness of monetary ***,few scholars have studied the characteristics of interest rate transmission in *** in-depth study of the interest rate transmission mechanism and its dynamic evolution between different bond markets is conducive to clarify the pulse of transmission within Chinese bond market and to further unblock the transmission mechanism of monetary *** the perspective of system theory and based on the analysis method of Granger causality complex network,this paper finds that the interest rate transmission among various varieties in China’s bond market is relatively *** bonds and CDB bonds are the two core bond varieties of interest rate transmission in the bond ***,this study concludes that the medium and long-term interest rate played a dominant role in the transmission of market interest rate during the easing phase of monetary policy,while the short-term interest rate played a dominant role in the transmission of market interest rate during the tightening phase of monetary *** paper also gives enlightenment and suggestions.

关键词： bond market interest rate transmission mechanism Granger causality complex network

Effects of weaning on intestinal longitudinal muscle-myenteric plexus function in piglets

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Science China(Life Sciences) 2024年第2期67卷 379-390页

作者： Jing Li Fenfen Liu Kaibin mo Hengjia Ni Yulong yin Key Laboratory of Agro-Ecological Processes in Subtropical Region Hunan Provincial Key Laboratory of Animal Nutritional Physiology and Metabolic ProcessHunan Research Center of Livestock and Poultry SciencesSouth Central Experimental Station of Animal Nutrition and Feed Science in the Ministry of AgricultureInstitute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China University of Chinese Academy of Sciences Beijing 100008China Guangdong Key Laboratory for Veterinary Drug Development and Safety Evaluation College of Veterinary MedicineSouth China Agricultural UniversityGuangzhou 510642China

Weaning piglets usually suffer from severe diarrhea(commonly known as postweaning diarrhea,PWD)along with intestinal motility *** peristalsis is mainly regulated by the longitudinal muscle-myenteric plexus(LM-MP).To understand the relationship between intestinal LM-MP function and the development of PWD,we compared the intestinal electrical activity,and the transcriptional profile of the LM-MP between 21-day-old piglets(just weaned,n=7)and 24-day-old piglets(suffered the most severe weaning stress,n=7).The results showed that 24-day-old piglets exhibited different degrees of diarrhea.A significant increase in the slow-wave frequency in the ileum and colon was observed in 24-day-old piglets,while c-kit expression in the intestinal LM-MPs was significantly decreased,indicating that PWD caused by elevated slow-wave frequency may be associated with loss of *** real-time quantitative PCR(RT-q PCR)and enzyme-linked immunosorbent assay(ELISA)showed that intestinal LM-MPs in 24-day-old piglets may undergo inflammation and oxidative *** increases in 8-hydroxy-2′-deoxyguanosine and decreases in thioredoxin suggest that weaning may lead to DNA damage in the LM-MP of 24-day-old *** addition,activating transcription factor 3 was significantly upregulated,indicating nerve damage in the LM-MP of 24-day-old *** transcriptomic results showed that most of the differentially expressed genes in the ileal LM-MP after weaning were downregulated and closely related to the cell cycle *** RT-q PCR analysis showed that the relative expression of p21 was upregulated,while the expression of cyclin A2,cyclin B1,and proliferating cell nuclear antigen was downregulated in the ileal and colonic LM-MP of 24-day-old piglets,suggesting that weaning may inhibit cell proliferation and cause G1/S cell cycle arrest in ileal and colonic *** conclusion,weaning may lead to cell cycle arrest by causing DNA damage in the LM-MP,impairing i

关键词： weaning piglets diarrhea longitudinal muscle-myenteric plexus

Coupling WO_(3-x) dots-encapsulated metal-organic frameworks and template-free branched polymerization for dual signal-amplified electrochemiluminescence biosensing

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Chinese Chemical Letters 2024年第4期35卷 469-474页

作者： Fei yin Erli Yang Xue Ge Qian Sun Fan mo Guoqiu Wu Yanfei Shen Medical School Southeast UniversityNanjing 210009China Center of Clinical Laboratory Medicine Zhongda HospitalSoutheast UniversityNanjing 210009China Jiangsu Provincial Key Laboratory of Critical Care Medicine Southeast UniversityNanjing 210009China

Developing accurate and sensitive DNA methyltransferase(MTase) analysis methods is essential for early clinical diagnosis and development of antimicrobial drug targets. In this work, by coupling WO_(3-x) dotsencapsulated metal-organic frameworks(moFs) as co-reactants and terminal deoxynucleotidyl transferase(Td T)-mediated template-free branched polymerization, a dual signal-amplified electrochemiluminescent(ECL) biosensor was constructed to detect DNA adenine methylation(Dam) MTase. The employment of WO_(3-x) dots-encapsulated moFs(i.e., NH_(2)-UIO66@WO_(3-x) ) was not only beneficial for biomolecule conjugation because of the abundant amino groups but also led to a 7-fold enhanced ECL response due to the increased loading of WO_(3-x). moreover, Td T-mediated template-free branched polymerization promoted the capture of ECL emitters on the electrode surface, achieving 20-fold enhanced signal amplification. The presented ECL biosensor demonstrated a low detection limit of 2.4 × 10^(-4)U/m L, and displayed high reliability for the detection of Dam MTase in both spiked human serum and E. coli cell samples, and for the screening of potential inhibitors. This study opens a new avenue for designing a dual signal amplificationbased ECL bioassay for Dam MTase and screening inhibitors in the fields of clinical diagnosis and drug development.

关键词： Dual signal-amplified electrochemiluminescence WO_(3-x)dots moFs Template-free branched polymerization DNA methyltransferase

本土酵母与商业酵母混菌发酵对“马瑟兰”干红葡萄酒品质的影响

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安徽农业科学 2024年第2期52卷 152-155页

作者：张春芝江志国莫寅斌吴立国谢惠芳宁夏葡萄酒与防沙治沙职业技术学院宁夏银川750199

从贺兰山东麓葡萄酒产区筛选出适合该产区“马瑟兰”干红葡萄酒的本土酵母,与酿酒酵母CECA以1∶1混合发酵“马瑟兰”干红葡萄酒。结果表明:通过葡萄酒理化指标检测结果可知,酿酒酵母(Saccharomyces cerevisiae,5号)、毕赤酵母属克鲁维... 详细信息

从贺兰山东麓葡萄酒产区筛选出适合该产区“马瑟兰”干红葡萄酒的本土酵母,与酿酒酵母CECA以1∶1混合发酵“马瑟兰”干红葡萄酒。结果表明:通过葡萄酒理化指标检测结果可知,酿酒酵母(Saccharomyces cerevisiae,5号)、毕赤酵母属克鲁维毕赤酵母(Pichia kluyveri,8号)、有孢汉逊酵母属葡萄汁有孢汉逊酵母(Hanseniaspora uvarum,12号)、红酵母属胶红酵母(Rhodotorula mucilaginosa,13号)、梅奇酵终属美极梅奇酵母(Metschnikowia pulcherrima,14号)在葡萄酒酿造中均具有良好的酿酒特性和广阔的应用前景。通过葡萄酒香气成分检测结果可知,8号酵母菌与酿酒酵母CECA混合发酵和5号酵母菌单独发酵“马瑟兰”干红葡萄酒中乙酸异戊酯、异戊醇、己酸乙酯、辛酸乙酯、癸酸乙酯、9-癸烯酸乙酯、乙酸苯乙酯、乙酸乙酯、异戊酸乙酯、月桂酸乙酯、α-乙酸萜品酯、苯乙醇、香茅醇、异丁醇的浓度较高,具有果香与花香浓郁的特点,尤其8号酵母菌与酿酒酵母CECA混合发酵具有蜂蜜及淡甜味。

关键词：本土酵母混菌发酵马瑟兰干红葡萄酒香气分析

Transient receptor potential vanilloid 1 involved in the analgesic effects of total flavonoids extracted from Longxuejie(Resina Dracaenae Cochinchinensis)

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Journal of Traditional Chinese Medicine 2024年第3期44卷 437-447页

作者： mo Xiaoqiang CHEN Yating yin Qian CHEN Haibo BAN Qiang LI Jun CHEN Su YAO Jinguang Department of Stomatology Affiliated Hospital of Youjiang Medical University for Nationalities College of General Practitioners Youjiang Medical University for Nationalities College of Biomedical Engineering South-Central Minzu UniversityKey Laboratory of Cognitive Science of State Ethnic Affairs CommissionHubei Key Laboratory of Medical Information Analysis and Tumor Diagnosis and Treatment College of Pharmacy South-Central Minzu University

OBJECTIVE: To evaluate the analgesic effects of total flavonoids of Longxuejie(Resina Dracaenae Cochinchinensis)(TFDB) and explore the possible analgesic mechanism associated with transient receptor potential vanilloid 1(TRPV1).METHODS: Whole-cell patch clamp technique was used to observe the effects of TFDB on capsaicin-induced TRPV1 currents. Rat experiments in vivo were used to observe the analgesic effects of TFDB. Western blot and immunofluorescence experiments were used to test the change of TRPV1 expression in DRG neurons induced by ***: Results showed that TFDB inhibited capsaicin-induced TRPV1 receptor currents in acutely isolated dorsal root ganglion(DRG) neurons of rats and the half inhibitory concentration was(16.7 ± 1.6) mg/***(2-20 mg/kg) showed analgesic activity in the phase Ⅱ of formalin test and(0.02-2 mg per paw)reduced capsaicin-induced licking times of rats. TFDB(20 mg/kg) was fully efficacious on complete Freund's adjuvant(CFA)-induced inflammatory thermal hyperalgesia and capsaicin could weaken the analgesic effects. The level of TRPV1 expressions of DRG neurons was also decreased in TFDB-treated CFA-inflammatory pain ***: All these results indicated that the analgesic effect of TFDB may contribute to their modulations on both function and expression of TRPV1 channels in DRG neurons.

关键词： Freund's adjuvant Longxuejie () capsaicin flavonoids formaldehyde inflammatory pain transient receptor potential vanilloid 1