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Hyperlanins A and B, Two Highly Rearranged Meroterpenoids from Hypericum lancasteri

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Chinese Journal of Chemistry 2024年第18期42卷 2180-2186页

作者： Jin-Qiu You Yun-Qi Jin Meng-Yu li Bo-Chao Zhang Xin-Yu Sun Chun-Yong Ding jing-ya li Ai-Jun Hou Shanghai Frontiers Science Center of Drug Target Identification and Delivery School of Pharmaceutical SciencesShanghai Jiao Tong UniversityShanghai200240China National Key Laboratory of Innovative Immunotherapy Shanghai Jiao Tong UniversityShanghai 200240China Shanghai Jiao Tong University School of Medicine Shanghai 200025China Shanghai Institute of Materia Medica Chinese Academy of SciencesShanghai 201203China

Hyperlanins A(1)and B(2),two highly rearranged polycyclic polyprenylated acylphloroglucinol(PPAP)-related meroterpenoids based on different new carbon skeletons,were isolated from Hypericum *** 1 incorporates an unprecedented 5/6/7/5 ring system featuring a 3,13-dioxatetracyclo[9.***.1.12.5.01.8]pentadecane *** 2 possesses a unique compact 6/6/5/6/6/5/6 ring system with a caged tetracyclo[6.***.1.13.8.05,11]dodecane *** structures were established by spectroscopic data,X-ray diffraction,and computational *** compounds showed anti-inflammatory activity in *** 1 and 2 could decrease the lipopolysaccharide(LPS)-/nigericin-induced IL-1βrelease in THP-1 *** compounds also showed inhibition in hypoxia-inducible factor-1α(HIF-1αa)pathway luciferase reporter assay.

关键词： Natural products Hypericum lancasteri Meroterpenoids Structureelucidation Inflammation

Efficient micrometer-scale thick-film perovskite solar cells with superior stability

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Rare Metals 2024年第4期43卷 1647-1657页

作者： Jian-Fei Hu Gang Chen Shun-Zhang Yu Yue-Xin lin Kai-Yu Wang Zong-Wei li Guo-Dong Zhang Teng-Fei Pan ya-jing li Ming-Jie li Ying-Dong Xia Yi-Fan Lv Yong-Hua Chen Key Laboratory of Flexible Electronics(KLoFE)and Institute of Advanced Materials(IAM) School of Flexible Electronics(Future Technologies)Nanjing Tech University(NanjingTech)Nanjing211816China Department of Applied Physics The Hong Kong Polytechnic UniversityHong Kong999077China Shenzhen Research Institute The Hong Kong Polytechnic UniversityShenzhen518057China Optics Valley Laboratory Hubei430074China

It is essential to enhance the thickness of the absorber layer for perovskite solar cells(PSCs)to improve device performance and reduce industry ***,thick perovskite films(>1μm)are difficult to be fabricated by employing traditional solvents,such as N,N-dimethylformamide(DMF),dimethyl sulfoxide(DMSO).Besides,it is a challenge to fabricate thick-film perovskite owing to the deteriorated surface morphology and serious defect ***,a simple method was reported to deposit uniform pinhole-free perovskite films with a thickness of more than 2μm utilizing the methylamine acetate(MAAc)ionic liquid as the *** with methylammonium chloride(MACl)as an additive,thick-film perovskite with~2μm in grain size and few grain boundaries(GBs)was prepared,which dramatically improved the perovskite crystal quality and enhanced carrier transport *** final PSCs exhibited a power conversion efficiency(PCE)of 20.16%.The device showed improved stability with 95%of its initial efficiency in a nitrogen environment over 5000 *** work provides an alternative strategy to produce extremely efficient and stable thick-film *** can be believed that this device has great potential in the application of large areas and laminated PSCs.

关键词： Perovskite solar cells Thick-film Stability Ionic liquid

Synthesis of tanshinoneⅡA analogues and their inhibitory activities against Cdc25 phosphatases

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Chinese Chemical Letters 2009年第12期20卷 1461-1464页

作者： Wei Gang Huang jing ya li Yu Luo Jia li Wei Lu Department of Chemistry East China Normal University Shanghai 200062 China The National Center for Drugs Screening Shanghai Institute ofMateria Medica SIBS Chinese Academy of Sciences Shanghai 201203 China

Two series of tanshinone ⅡA derivatives were synthesized and evaluated for their antitumor activities as Cdc25 phosphatase inhibitors. Most of them demonstrated potent Cdc25 inhibitory activity and powerful cytotoxicity against A549 tumor cell line, producing IC50 values in very low micromolar range. At last, the preliminary SAR was discussed.

关键词： Tanshinone ⅡA Cdc25 phosphatases Synthesis Antitumor

PHOTOSWITCHABLE NANOFLUOROPHORES FOR INNOVATIVE BIOIMAGING

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Journal of Innovative Optical Health Sciences 2011年第4期4卷 395-408页

作者： MING-QIANG ZHU GUO-FENG ZHANG CHONG li ya-jing li MATTHEW PALDRED ALEXANDER D.Q.li Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan 430074 China Department of Chemistry Washington State University PullmanWA 99164USA

Photosensitive fluorescent probes have become powerful tools in chemical biology and molecular biophysics,which are used to investigate cellular processes with high temporal and spatial ***,photosensitive fluorescent probes,including photoactivatable,photoconvertible,and photoswitchable fluorophores,have been extensively developed during the past *** photoswitchable fluorophores have received much attention because they highlight cellular events *** minireview summarizes recent advances of using reversibly photoswitchable fluorophores and their applications in innovative *** fluorophores include photoswitchable fluorescent proteins,photoswitchable fluorescent organic molecules(dyes),and photoswitchable fluorescent *** strategies have been developed to synthesize photoswitchable fluorophores,including engineering combination proteins,chemical synthesis,polymerization,and *** we concentrate on polymer nanoparticles with optically switchable emission properties:either fluorescence on/offor dualalternating-color fluorescence *** essential mechanisms of fluorescence photoswitching enable different types of photoswitchable fluorophores to change emission intensity or wavelength(color)and thus validating the basis of the fluorescence on/offor dual-color photoswitching *** the possible applications of any fluorophores are to label biological targets,followed by specific *** newly developed photoswitchable fluorophores enable super-resolution fluorescence imaging because of their photosensitive ***,we summarize the important area regarding future research and development on photoswitchable fluorescent nanoparticles.

关键词： Fluorescent molecular switches polymer nanoparticles two-photon two-photon imaging spiropyran

通督调神针刺法联合认知功能训练对卒中后认知障碍患者肠道菌群和神经递质的影响

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现代生物医学进展 2024年第1期24卷 167-170页

作者：景亚丽顾晨丛魏凯刘杰王利春河北中医学院研究生学院河北石家庄050000 承德医学院中医学院河北承德067000 河北省沧州中西医结合医院神经重症康复科河北沧州061000

目的:观察通督调神针刺法联合认知功能训练对卒中后认知障碍患者神经递质、肠道菌群的影响。方法:按照随机数字表法将河北省沧州中西医结合医院2021年7月-2022年10月收治的124例卒中后认知障碍患者分为对照组(62例,认知功能训练)和观察... 详细信息

目的:观察通督调神针刺法联合认知功能训练对卒中后认知障碍患者神经递质、肠道菌群的影响。方法:按照随机数字表法将河北省沧州中西医结合医院2021年7月-2022年10月收治的124例卒中后认知障碍患者分为对照组(62例,认知功能训练)和观察组(62例,认知功能训练、通督调神针刺法联合治疗)。对比两组简易精神状态检查表(MMSE)、日常生活活动(ADL)、蒙特利尔认知评估量表(MoCA)、血清神经递质[去甲肾上腺素(NE)、神经递质乙酰胆碱(ACh)、5-羟色胺(5-HT)、多巴胺(DA)]、肠道菌群指标。结果:治疗30 d后,观察组MMSE、MoCA、ADL评分高于对照组同期(P<0.05)。治疗30 d后,观察组Ach、DA、NE、5-HT高于对照组同期(P<0.05)。治疗30 d后,观察组大肠埃希菌、肠球菌低于对照组同期,双歧杆菌、乳杆菌高于对照组同期(P<0.05)。结论:卒中后认知障碍患者在认知功能训练基础上结合通督调神针刺法,认知功能、肠道菌群和神经递质水平显著改善,从而有利于改善患者的日常生活活动能力。

关键词：通督调神针刺法认知功能训练卒中后认知障碍肠道菌群神经递质

Association between brain N-acetylaspartate levels and sensory and motor dysfunction in patients who have spinal cord injury with spasticity:an observational case-control study

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Neural Regeneration Research 2023年第3期18卷 582-586页

作者： Jia-Yi liu ya-jing li Xin-Ying Cong Zuliyaer Talifu Xin Zhang Feng Gao Jian-Jun li School of Rehabilitation Capital Medical UniversityBeijingChina Department of Spinal and Neural Function Reconstruction China Rehabilitation Research CenterBeijingChina China Rehabilitation Science Institute BeijingChina Beijing Key Laboratory of Neural Injury and Rehabilitation BeijingChina Center of Neural Injury and Repair Beijing Institute for Brain DisordersBeijingChina Rehabilitation Department Shanghai Huashan HospitalShanghaiChina Department of Medical Imaging China Rehabilitation Research CenterBeijingChina

Spinal cord injury is a severe and devastating disease,and spasticity is a common and severe complication that is notoriously refractory to ***,the pathophysiological mechanisms underlying spasticity and its development remain largely *** goal of the present study was to find differences,if any,in metabolites of the left precentral gyrus and basal ganglia of patients who have spinal cord injury with or without spasticity,and to explore the relationship between the brain metabolite concentrations and clinical ***-six participants were recruited for magnetic resonance spectroscopic examination:23 with spinal cord injury(12 with spasticity and 11 without spasticity)and 13 healthy *** acquired localized proton spectra from the precentral gyrus and basal ganglia via 10 mm^(3) ***,univariate linear regression analysis demonstrated that the lower that the N-acetylaspartate concentration(a marker for neuronal loss)was in the precentral gyrus of the patients,the lower their ASIA(American Spinal Injury Association)light-touch scores,pinprick scores,and motor ***,longer durations of injury were associated with higher N-acetylaspartate levels in the precentral *** with the healthy participants and patients without spasticity,N-acetylaspartate levels in the patients with spasticity were significantly lower in both the precentral gyrus and basal *** N-acetylaspartate levels also correlated with greater sensory and motor dysfunction in the patients who had spinal cord injury with spasticity.

关键词： ASIA motor score ASIA sensory score basal ganglia central nervous system duration of injury magnetic resonance spectroscopy N-acetylaspartate precentral gyrus spasticity spinal cord injury

pH Induced Self-assembly of AIE Fluorescent Probe for Tumor Imaging

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Chinese Journal of Polymer Science 2024年第1期42卷 7-13,I0005页

作者： jing-Yuan Xiang Wen-Long Zhang He-Ting li ya-Ning He Department of Chemical Engineering Key Laboratory of Advanced Materials(MOE)Tsinghua UniversityBejing 100084China

This work reported an AIE fluorescent probe for tumor imaging based on the p H induced self-assembly strategy. The fluorescent probe was composed of an acid-responsive soluble copolymer PEG-b-PAMA-DMMA with a maleic acid amide group and an anionic soluble aggregation-induced emission fluorogen(AIEgen) TPE-2SO_(3)^(-). The polymer could be transformed into a protonated amine-containing polymer after the hydrolysis of maleic acid amide in acidic tumor microenvironment, which would be further self-assembled with TPE-2SO_(3)^(-)to form aggregated nanoparticles. The transition of TPE-2SO_(3)^(-)from dispersed state to aggregated state led to an obvious increase in fluorescence intensity due to its AIE characteristics.

关键词： p H-responsive Self-assembly Fluorescent probe AIE Tumor imaging

Chain Dynamics Heterogeneity in Plasticized Poly(vinyl butyral)(PVB) as Elucidated by Solid-State NMR

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Chinese Journal of Polymer Science 2024年第1期42卷 113-124,I0010页

作者： jing Lv Xu Chen Zi-Shuo Wu ya-Hui li Wei Chen National Synchrotron Radiation Laboratory Anhui Provincial Engineering Laboratory of Advanced Functional Polymer FilmCAS Key Laboratory of Soft Matter ChemistryUniversity of Scienceand Technology of ChinaHefei 230026China

The chain dynamics heterogeneity of the poly(vinyl butyral)(PVB) plasticized by triethylene glycol bis(2-ethylhexa noate)(TEG-EH) was investigated by various solid-state NMR *** plasticized PVB shows two domains in distinct molecular dynamics differences,namely,rigid and soft domains,where the latter is the plasticizer-rich *** time domain low field NMR was first used to investigate the dynamics heterogeneity of the plasticized PVB,and the results show the decreasing activated energy of components in the soft domain of plasticized PVB(E_a=20.2 kJ/mol) as compared with that of the pristine one(E_a=24.3 kJ/mol).Detailed dynamics heterogeneity was obtained by high-field NMR with site-specific *** quadrupole-echo ~2H-NMR was adopted to elucidate the dynamics heterogeneity of the vinyl alcohol(VA) units,where only the hydroxyl group of VA is *** ~1H-^(13)C WISE NMR spectra show that there is not much difference in the mobility of the VB unit in PVB with and without plasticizer,whereas the glass transition temperature differed by approximately 53℃.This is further supported by Torchia's T_1 relaxation *** origin of such an unusual phenomenon is attributed to the critical role of the remaining VA(~22%) in the soft domain,where the VA units locally aggregate through hydrogen ***,the existence of a mobility gradient in the VB unit has been ***,the mobility difference for VB with different stereo-geometry(meso or racemic conformation) is observed for the first *** indicates the importance of modulating the ratio of meso over racemic VB for controlling the macroscopic perfo rmance of PVB.

关键词： Poly(vinyl butyral) Dynamics heterogeneity Plasticizer Solid state NMR

A new class of potent liver injury protective compounds: Structural elucidation, total synthesis and bioactivity study

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Acta Pharmaceutica Sinica B 2023年第8期13卷 3414-3424页

作者： Kailong Ji Wei liu Weihang Yin Xiangrong Kong Honghong Xu Zeng-Wei Lai jing-ya li Jian-Min Yue State Key Laboratory of Drug Research Shanghai Institute of Materia MedicaChinese Academy of SciencesShanghai 201203China School of Chinese Materia Medica Nanjing University of Chinese MedicineNanjing 210023China

A new class of potent liver injury protective compounds,phychetins A-D(1-4)featuring an unique 6/6/5/6/5 pentacyclic framework,were isolated and structurally characterized from a Chinese medicinal plant Phyllanthus *** 2-4 are three pairs of enantiomers that were initially obtained in a racemic manner,and were further separated by chiral HPLC *** 1-4 were proposed to be originated biosynthetically from a coexisting lignan via an intramolecular Friedel-Crafts reaction as the key step.A bioinspired total synthesis strategy was thus designated,and allowed the effective syntheses of compounds 2-4 in high *** of compounds exhibited significant anti-inflammatory activities in vitro via suppressing the production of pro-inflammatory cytokine IL-1β.Notably,compound 4,the most active enantiomeric pair in vitro,displayed prominent potent protecting activity against liver injury at a low dose of 3 mg/kg in mice,which could serve as a promising lead for the development of acute liver injury therapeutic agent.

关键词： Phychetins Phyllanthusfranchetianus Structural elucidation Total synthesis liver injury protection Anti-inflammation