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Facile synthesis and cytotoxicity of 5-C-alkylates of 20(S)-camptothecins

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Chinese Chemical Letters 2008年第10期19卷 1202-1205页

作者： Di Zao Li Xian Dao pan hong yan Liu Song Wu Institute of Materia Medica Chinese Academy of Medical Sciences ＆ Peking Union Medical College Beifing 100050 China

A series of 5-C-alkylating camptothecins have been synthesized by one-step method, and their in vitro antitumor activity was evaluated against six human cancer cell lines. The results showed that all 5-C-alkylates of ... 详细信息

关键词： Camptothecin Synthesis 5-C-Alkylate Antitumor activity

Reconfigurable memlogic long wave infrared sensing with superconductors

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Light(Science & Applications) 2024年第5期13卷 908-920页

作者： Bingxin Chen Huanyi Xue hong pan Liping Zhu Xiaomi yan Jingzhe Wang yanru Song Zhenghua An State Key Laboratory of Surface Physics and Institute for Nanoelectronic Devices and Quantum Computing Department of PhysicsFudan UniversityShanghai 200438China. ShanghaiTech Quantum Device Lab ShanghaiTech UniversityShanghai 201210China. Shanghai Qi Zhi Institute 41th FloorAI TowerNo.701 Yunjin RoadXuhui DistrictShanghai 200232China. Yiwu Research Institute of Fudan University Chengbei RoadYiwu City 322000 ZhejiangChina. Zhangjiang Fudan International Innovation Center Fudan UniversityShanghai 201210China

Optical sensors with in-cell logic and memory capabilities offer new horizons in realizing machine vision beyond von Neumann architectures and have been attempted with two-dimensional materials,memristive oxides,phasechanging materials *** the unparalleled performance of superconductors with both quantum-limited optical sensitivities and ultra-wide spectrum coverage,here we report a superconducting memlogic long-wave infrared sensor based on the bistability in hysteretic superconductor-normal phase *** cooperatively by electrical and optical pulses,the device offers deterministic in-sensor switching between resistive and superconducting(hence dissipationless)states with persistence>105 *** results in a resilient reconfigurable memlogic system applicable for,e.g.,encrypted ***,a high infrared sensitivity at 12.2μm is achieved through its in-situ metamaterial perfect absorber *** work opens the avenue to realize all-in-one superconducting memlogic sensors,surpassing biological retina capabilities in both sensitivity and wavelength,and presents a groundbreaking opportunity to integrate visional perception capabilities into superconductor-based intelligent quantum machines.

关键词： wave superconductor quantum

Clinical efficacy and safety of erlotinib combined with chemotherapy in the treatment of advanced pancreatic cancer:A meta-analysis

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 921-931页

作者： Xiao-yan Liu hong-Nian pan Yue Yu Cheeloo College of Medicine Shandong UniversityJinan 250012Shandong ProvinceChina Department of Gastroenterology The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230001Anhui ProvinceChina Department of Gastroenterology The Lu’an Hospital Affiliated to Anhui Medical UniversityThe Lu’an People's HospitalLu’an 237000Anhui ProvinceChina

BACKGROUND Advanced pancreatic cancer is resistant to chemotherapeutic drugs,resulting in limited treatment efficacy and poor *** administration of the chemotherapeutic gemcitabine and erlotinib is considered a potential first-line treatment for advanced pancreatic ***,their comparative benefits and potential risks remain *** To assess the clinical efficacy and safety of erlotinib combined with other chemotherapy regimens for the treatment of advanced pancreatic *** Literature on the clinical efficacy and safety of erlotinib combined with chemotherapy for advanced pancreatic cancer was retrieved through an online *** retrieved literature was subjected to a methodological qualitative assessment and was analyzed using the RevMan 5.3 *** randomized controlled trials involving 2444 patients with advanced pancreatic cancer were included in the *** Compared with chemotherapeutic treatment,erlotinib combined with chemotherapy significantly prolonged the progression-free survival time of pancreatic cancer patients[hazard ratio(HR)=0.78,95%CI:0.66-0.92,P=0.003].Meanwhile,the overall survival(HR=0.99,95%CI:0.72-1.37,and P=0.95)and disease control rate(OR=0.93,95%CI:0.45-0.91,P=0.84)were not significantly *** terms of safety,the erlotinib and chemotherapy combination was associated with a significantly higher risk of diarrhea(OR=3.59,95%CI:1.63-7.90,Ppancreatic cancer,but does not improve survival benefit or disease control rate,and can increase the risk of diarrhea and rash.

关键词： Erlotinib Chemotherapy Advanced pancreatic cancer Efficacy Safety Meta-analysis

Microstructure features induced by fatigue crack initiation up to very-high-cycle regime for an additively manufactured aluminium alloy

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Journal of Materials Science & Technology 2024年第6期173卷 247-260页

作者： Xiangnan pan Leiming Du Guian Qian Youshi hong State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing 100190China

Fatigue failure can still occur beyond 107 cycles,***-high-cycle fatigue(VHCF),in many metallic materials,such as aluminium alloys and high-strength *** VHCF of high-strength steels,a fine granular area(FGA)surrounding an inclusion is commonly identified as the characteristic region of crack initiation on the fracture ***,no such FGA feature and related crack initiation behaviour were observed in VHCF of conventionally cast or wrought aluminium ***,we first reported the distinct mechanisms of crack initiation and early growth,namely the microstructure feature and the role of FGA in VHCF performance for an additively manufactured(AM)AlSi10Mg *** AM pores play a key role in fatigue crack initiation similar to that of the inclusions in high-strength steels,resulting in almost identical FGA behaviour for different materials under a range of mean stress with a stress ratio at R*** profile microstructure of FGA is identified as a nanograin layer with Si rearrangement and grain boundary *** process consumes a large amount of cyclic plastic energy making FGA undertake a vast majority of VHCF *** results will deepen the understanding of VHCF nature and shed light on crack initiation mechanism of other aluminium and AM alloys.

关键词： Aluminium alloy Additive manufacturing Nanograins Very-high-cycle fatigue(VHCF) Crack initiation Mean stress

BAIAP2L2在肝癌中的表达及与预后的关系

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广东医学 2024年第1期45卷 83-93页

作者：袁克荣戈英男潘红艳龚达莫佳业邓雪松深圳大学第一附属医院、深圳市第二人民医院肝胆胰外科广东深圳518035 华中科技大学协和深圳医院消化内科广东深圳518052

目的从生物信息学角度分析脑组织特异性血管生成抑制因子1关联蛋白2同类基因2(BAIAP2L2)在肝癌(LIHC)中的表达模式与预后关系、及其潜在的作用机制,并在临床病例中探讨其在LIHC中的表达与临床特征的相关性。方法在TCGA、GEPIA、GEO和TI... 详细信息

目的从生物信息学角度分析脑组织特异性血管生成抑制因子1关联蛋白2同类基因2(BAIAP2L2)在肝癌(LIHC)中的表达模式与预后关系、及其潜在的作用机制,并在临床病例中探讨其在LIHC中的表达与临床特征的相关性。方法在TCGA、GEPIA、GEO和TIMER数据库分析BAIAP2L2在泛癌组织和正常组织的差异表达情况,通过单因素和多因素回归分析BAIAP2L2的表达与预后的关系,采用Spearman分析法评估BAIAP2L2表达与肿瘤的基因组不稳定性的相关性;通过ssGSEA算法和KEGG富集分析与BAIAP2L2表达相关的信号通路。在临床病例中,采用免疫组化方法检测BAIAP2L2在55例LIHC组织、癌旁组织和10例正常肝组织的表达,分析其表达与病理特征、预后的相关性。结果BAIAP2L2在泛癌中普遍高表达,与相应癌旁组织、正常组织的表达有差异,与肾上腺皮质癌(ACC)、低级别胶质瘤(LGG)、间皮瘤(MESO)、前列腺癌(PRAD)、黑色素瘤(SKCM)、子宫内膜癌(UCEC)、葡萄膜黑色素瘤(UVM)等7种肿瘤的不良预后显著相关。BAIAP2L2的表达水平与食管癌(ESCA)、胰腺癌(PAAD)、UCEC的肿瘤突变负荷(TMB)正相关(P<0.05);与胆管癌(CHOL)、弥漫性大B细胞淋巴瘤(DLBC)、UVM和LGG的微卫星含量(MSI)正相关(P<0.05),与结直肠癌(READ)的MSI负相关(P<0.05)。BAIAP2L2主要参与了LIHC中16条信号通路调控,与鞘糖脂生物合成/新乳糖合成、G_(2)/M期检查点、肿瘤增殖、鞘脂代谢和糖胺聚糖生物合成硫酸角蛋白等通路正相关,与脂肪酸降解、初级胆汁酸生物合成、β-丙氨酸代谢、生物素代谢、丁酸代谢、赖氨酸降解、D-精氨酸/D-鸟氨酸的代谢、硒化合物代谢、缬氨酸/亮氨酸/异亮氨酸的降解、色氨酸代谢和咖啡因代谢等通路负相关。临床病例资料显示,LIHC组织BAIAP2L2的表达明显高于癌旁组织(P<0.0001)和正常肝组织(P=0.0036),与LIHC的肿瘤数目(P=0.038)、直径(P=0.0101)和分化程度(P=0.0314)相关;BAIAP2L2高表达组的术后总生存期低于低表达组(P=0.0182);单因素分析结果表明,BAIAP2L2表达水平与LIHC患者生存预后相关。结论BAIAP2L2通过调控TMB、MSI和多种信号通路促进肿瘤的发生、发展。BAIAP2L2在LIHC表达水平显著高于对应的癌旁组织和正常肝组织,与肿瘤数目、直径和分化程度密切相关,是促进肿瘤进展和导致不良预后的重要因素。

关键词： BAIAP2L2 生物信息学肝细胞癌预后临床特征

DNA damage response-related immune activation signature predicts the response to immune checkpoint inhibitors: from gastrointestinal cancer analysis to pan-cancer validation

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Cancer Biology & Medicine 2024年第3期21卷 252-266页

作者： Junya yan Shibo Wang Jing Zhang Qiangqiang Yuan Xianchun Gao Nannan Zhang yan pan Haohao Zhang Kun Liu Jun Yu Linbin Lu Hui Liu Xiaoliang Gao Sheng Zhao Wenyao Zhang Abudurousuli Reyila Yu Qi Qiujin Zhang Shundong Cang Yuanyuan Lu yanglin pan yan Kong Yongzhan Nie State Key Laboratory of Holistic Integrative Management of Gastrointestinal Cancers and National Clinical Research Center for Digestive Diseases Xijing Hospital of Air Force Military Medical UniversityXi'an 710032China Department of Oncology Henan Provincial People's HospitalZhengzhou University People's HospitalZhengzhou 450o03China Faculty of Life Science Northwest UniversityXi'an 710069China Unit 73211 of the People's Liberation Army Nanjing 211800China Key Laboratory of Resource Biology and Biotechnology in Western China(Ministry of Education) School of MedicineNorthwest UniversityXi'an 710069China Shaanxi University of Chinese Medicine Second Clinical Medicine FacultyXi'an 712046China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education) Department of Renal Cancer and MelanomaPeking University Cancer Hospital and InstituteBeijing 100142China

Objective: DNA damage response(DDR) deficiency has emerged as a prominent determinant of tumor immunogenicity. This study aimed to construct a DDR-related immune activation(DRIA) signature and evaluate the predictive accuracy of the DRIA signature for response to immune checkpoint inhibitor(ICI) therapy in gastrointestinal(GI) ***: A DRIA signature was established based on two previously reported DNA damage immune response assays. Clinical and gene expression data from two published GI cancer cohorts were used to assess and validate the association between the DRIA score and response to ICI therapy. The predictive accuracy of the DRIA score was validated based on one ICI-treated melanoma and three pan-cancer published ***: The DRIA signature includes three genes(CXCL10, IDO1, and IFI44L). In the discovery cancer cohort, DRIA-high patients with gastric cancer achieved a higher response rate to ICI therapy than DRIA-low patients(81.8% vs. 8.8%;P pancreatic adenocarcinoma who received dual PD-1 and CTLA-4 blockade with radiation therapy. Furthermore, the predictive performance of the DRIA score was shown to be robust through an extended validation in melanoma, urothelial cancer, and ***: The DRIA signature has superior and robust predictive accuracy for the efficacy of ICI therapy in GI cancer and pancancer, indicating that the DRIA signature may serve as a powerful biomarker for guiding ICI therapy decisions.

关键词： DNA damage response-related immune activation immune checkpoint inhibitors biomarker gastrointestinal cancer pan-cancer

Review of data security within energy blockchain:A comprehensive analysis of storage,management,and utilization

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High-Confidence Computing

High-Confidence Computing 2024年第3期4卷 82-102页

作者： Yunhua He Zhihao Zhou yan pan Fahui Chong Bin Wu Ke Xiao hong Li School of Information Science and Technology North China University of TechnologyBeijing 100144China China Industrial Control Systems Cyber Emergency Response Team Beijing 100040China Key Laboratory in Blockchain and Data Security by Ministry of Industry and Information Technology Beijing 100040China Institute of Information Engineering Chinese Academy of Sciences Beijing 100195China

Energy systems are currently undergoing a transformation towards new paradigms characterized by decarbonization,decentralization,democratization,and *** this evolving context,energy blockchain,aiming to enhance efficiency,transparency,and security,emerges as an integrated technological solution designed to address the diverse challenges in this *** security is essential for the reliable and efficient functioning of energy *** pressing need to address challenges related to secure data storage,effective data management,and efficient data utilization is increasingly *** paper offers a comprehensive survey of academic discourse on energy blockchain data security over the past five years,adopting an all-encompassing perspective that spans data storage,management,and *** work systematically evaluates and contrasts the strengths and weaknesses of various research ***,this paper proposes an integrated hierarchical on-chain and off-chain security energy blockchain architecture,specifically designed to meet the complex security requirements of multi-blockchain business ***,this paper identifies key directions for future research,particularly in advancing the integration of storage,management,and utilization of energy blockchain data security.

关键词： Energy blockchain Data security Storage Management Utilization

Discovery of and Preliminary studies on a Rapid-Leafing Rice Genotype at the Vegetative Growth Stage

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Rice science 2008年第1期15卷 29-35页

作者： MAO Hai-yan pan Cun-hong CHEN Zong-xiang ZHANG Ya-fang Zuo Shi-min CHENG Jin-rong pan Xue-biao Key Laboratory of Crop Genetics and Physiology of Jiangsu Province~Key Laboratory of Plant Functional Genomics of Ministry ofEducation of China Yangzhou University Yangzhou 225009 China

The leafing rates of fourteen rice varieties were measured in a sowing-time experiment, and a rapid leafing genotype at the vegetative growth stage was discovered in an indica variety yanhui 559. The leaf number on the main culm of yanhui 559 was always 4-5 leaves more than that of Lemont, and the leafing rate of yanhui 559 was significantly higher than that of Lemont based on similar growth durations from sowing to heading. Furthermore, the difference of the leafing rate was significant at the vegetative growth stage, but not distinctive at the panicle initiation stage. Genetic analysis of the leafing rates in the two backcross populations of yanhui 559 and Lemont showed that major and quantitative genes controlled the expression of rapid leafing character. Based on results of investigation for some plants with similar growth durations in the backcrossing populations, the rapid leafing genotypes exhibited earlier tillering and more tiller numbers per plant, and its yield components including the number of panicles per plant and number of grains per panicle were superior to those of the slow leafing genotypes. Further research and application feasibility of the rapid leafing genotype in breeding were discussed.

关键词： rapid leafing vegetative growth stage leaf number on the main culm number of panicles per plant rice

Link between childhood obesity and gut microbiota

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World Journal of Gastroenterology 2024年第30期30卷 3560-3563页

作者： yan pan Fu-Yong Jiao Department of Pediatrics The First Affiliated Hospital of Yangtze UniversityJingzho 434000Hubei ProvinceChina Shaanxi Kawasaki Disease Diagnosis and Treatment Center Children's HospitalShaanxi Provincial People's Hospital of Xi'anJiaotong UniversityXi'an 710000Shaanxi ProvinceChina

Childhood obesity is a critical global health concern with rising prevalence and significant long-term health *** studies have implicated gut microbiota in the development and progression of *** editorial analyzes the research conducted by Li et al,who utilized 16S rRNA gene sequencing to compare the gut microbiome of overweight and healthy-weight *** study found significant differences in microbial diversity and composition between the two groups,with potential implications for understanding and managing childhood *** analyzed the study’s advantages and drawbacks,proposing potential areas for future research to better understand the connection between gut microbiota and obesity.

关键词： 16S rRNA Childhood obesity Gut microbiota Future research Global health