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Fabrication of PLGA coated silica nanorattle for controlling the drug release behavior

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Chinese Science Bulletin 2012年第27期57卷 3631-3638页

作者： LI LinLin ZHANG YanQi HAO NanJing CHEN Dong tang fangqiong Laboratory of Controllable Preparation and Application of Nanomaterials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Silica nanorattle with hollow and mesoporous structure has been proven to be an excellent drug carrier.However,how to control the drug release from silica nanorattle is still a challenge.In this study,we designed two methods,in-situ polymerization method and water in oil in water(W/O/W) double emulsion method,to coat a nanosized poly(lactic-co-glycolic acid)(PLGA) layer onto the surface of silica nanorattle for controlling the drug release behavior.Hydrophobic antitumor drug docetaxel was loaded into the PLGA coated silica nanorattle(PLGA@SN).The drug release profile,cellular uptake and cytotoxicity on human liver cancer HepG2 cells were evaluated to prove that the PLGA layer plays an effective role in tuning the drug delivery.

关键词： PLGA 抗癌药物二氧化硅释放行为控制 HepG2细胞制备包覆

Acute toxicity and oxidative damage induced by silica nanorattle in vivo

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Chinese Science Bulletin 2012年第20期57卷 2525-2532页

作者： FU ChangHui LIU TianLong tang fangqiong CHEN Dong LI LinLin LIU HuiYu LI XiaoMin School of Animal Science and Technology Southwest UniversityChongqing 400715China Laboratory of Controllable Preparation and Application of Nanomaterials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

Hollow mesoporous nanomaterial is a kind of promising new drug delivery system due to their unique hollow structures.In order to evaluate the toxicity of silica nanorattle (SN) particles in vivo,40 female mice were used in this study to investigate the acute toxicity and oxidative damage.Mice were intravenously injected with SN suspension in sterile 5% glucose at 40,80 and 240 mg/kg,respectively.The control group was administrated with equal-volume 5% glucose.Weight,feed intake,hematology analysis,blood biochemical assay and histopathology diagnosis were examined.The activities of SOD,GSH and CAT were measured as well.The results demonstrated that the levels of ALT and AST in the mice treated with 240 mg/kg SN increased significantly as compared with the control group (P<0.05),whereas the contents of BUN and CREA changed unremarkably.The activity of SOD induced by SN in the liver decreased significantly (P<0.05).In summary,this study revealed that liver was the target organ of the SN.It also can be concluded that activity of SOD played an important role in liver injury caused by SN.

关键词：急性毒性二氧化硅氧化损伤诱导体内超氧化物歧化酶病理组织学诊断雌性小鼠

Sensitive detection of dopamine and quinone drugs based on the quenching of the fluorescence of carbon dots

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Science Bulletin 2016年第20期61卷 1615-1623页

作者： Xiangling Ren Jiejie Ge Xianwei Meng Xiaozhong Qiu Jun Ren fangqiong tang Laboratory of Controllable Preparation and Application of Nanomaterials Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190China Department of Anatomy Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering Southern Medical University Guangzhou 510515 China

In this work,we demonstrated that the quinone structure can quench the fluorescence of the carbon dots(CDs).The sensitive determination of dopamine(DA) was studied primarily based on this principle.DA would be transformed into DA quinone under alkaline conditions,which resulted in fluorescence quenching of the CDs.A good linear range from 5 nmol/L to 0.4 mmol/L was obtained and the detection limit was 1 nmol/L.Moreover,the quenching effect of quinone structure on the fluorescence of CDs was confirmed by Fourier transform infrared spectra,time-correlated single-photon counting and X-ray photoelectron spectroscopy.Remarkably,CDs were firstly applied to detect the quinone drugs quantitatively which contained typical quinone structure based on the quenching mechanism.More than this,the sensing platform was demonstrated to provide credible selectivity and satisfactory stability in human serum solution with good liner range.Hence,our practical application and mechanism have showed great potential for diagnostic purposes.

关键词： Carbon dots Quinone structure Detection Dopamine Quinone drugs

Synthesis and Purple-Blue Emission of Antimony Trioxide Single-Crystalline Nanobelts with Elliptical Cross Section

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Nano Research 2009年第2期2卷 151-160页

作者： Zhengtao Deng Dong Chen fangqiong tang Jun Ren Anthony J.Muscat Laboratory of Controllable Preparation and Application of Nanomaterials Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100080China Department of Chemical and Environmental Engineering The University of ArizonaTucsonArizona 85721USA College of Optical Science The University of ArizonaTucsonArizona 85721USA

Single-crystalline orthorhombic antimony trioxide(Sb_(2)O_(3))nanobelts with unique elliptical cross sections and purple-blue photoluminescence have been synthesized.The uniform Sb2O3 nanobelts are 400600 nm in width,2040 nm in thickness at the center and gradually become thinner to form sharp edges sub-5 nm in size,tens of micrometers in length,and with[001]as the preferential growth direction.Self-assembly of tens of nanobelts into three-dimensional(3-D)flower-like nanostructures has been observed.Analysis was performed by X-ray diffraction,energy-dispersive X-ray spectroscopy,X-ray photoelectron spectroscopy,scanning electron microscopy,high-resolution transmission electron microscopy,selected area electron diffraction,Raman spectroscopy,Fourier transform infrared spectroscopy,and photoluminescence spectroscopy.The Sb_(2)O_(3) nanobelts display intense purple-blue photoluminescence centred at 425 nm(~2.92 eV).The successful synthesis of nanobelts with elliptical cross sections may cast new light on the investigation of the property differences between nanobelts with rectangular cross sections and those with other cross section geometries.The Sb2O3 nanobelts can be used as effective purple-blue light emitters and may also be valuable for future nanodevice design.

关键词： Antimony trioxide nanobelts elliptical cross section purple-blue photoluminescence

Flexible and Robust Functionalized Boron Nitride/Poly(p‑Phenylene Benzobisoxazole)Nanocomposite Paper with High Thermal Conductivity and Outstanding Electrical Insulation

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Nano-Micro Letters 2024年第2期16卷 423-437页

作者： Lin tang Kunpeng Ruan Xi Liu Yusheng tang Yali Zhang Junwei Gu Chongqing Key Laboratory of Green Synthesis and Applications College of ChemistryChongqing Normal UniversityChongqing 401331People’s Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710072People’s Republic of China

With the rapid development of 5G information technology,thermal conductivity/dissipation problems of highly integrated electronic devices and electrical equipment are becoming prominent.In this work,“high-temperature solid-phase&diazonium salt decomposition”method is carried out to prepare benzidine-functionalized boron nitride(m-BN).Subsequently,m-BN/poly(pphenylene benzobisoxazole)nanofiber(PNF)nanocomposite paper with nacremimetic layered structures is prepared via sol–gel film transformation approach.The obtained m-BN/PNF nanocomposite paper with 50 wt%m-BN presents excellent thermal conductivity,incredible electrical insulation,outstanding mechanical properties and thermal stability,due to the construction of extensive hydrogen bonds andπ–πinteractions between m-BN and PNF,and stable nacre-mimetic layered structures.Itsλ∥andλ_(⊥)are 9.68 and 0.84 W m^(-1)K^(-1),and the volume resistivity and breakdown strength are as high as 2.3×10^(15)Ωcm and 324.2 kV mm^(-1),respectively.Besides,it also presents extremely high tensile strength of 193.6 MPa and thermal decomposition temperature of 640°C,showing a broad application prospect in high-end thermal management fields such as electronic devices and electrical equipment.

关键词： Poly(p-phenylene-2,6-benzobisoxazole)nanofiber Boron nitride Thermal conductivity Electrical insulation

Orthogonal Combinatorial Raman Codes Enable Rapid High-Throughput-Out Library Screening of Cell-Targeting Ligands

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Research 2024年第1期2023卷 199-208页

作者： Yuchen tang Xingxing Zheng Tingjuan Gao China Key Laboratory of Pesticide and Chemical Biology of Ministry of Education College of ChemistryCentral China Normal UniversityWuhan 430079China

High-throughput assays play an important role in the fields of drug discovery,genetic analysis,and clinical diagnostics.Although super-capacity coding strategies may facilitate labeling and detecting large numbers of targets in a single assay,practically,the constructed large-capacity codes have to be decoded with complicated procedures or are lack of survivability under the required reaction conditions.This challenge results in either inaccurate or insufficient decoding outputs.Here,we identified chemical-resistant Raman compounds to build a combinatorial coding system for the high-throughput screening of cell-targeting ligands from a focused 8-mer cyclic peptide library.The accurate in situ decoding results proved the signal,synthetic,and functional orthogonality for this Raman coding strategy.The orthogonal Raman codes allowed for a rapid identification of 63 positive hits at one time,evidencing a high-throughput-out capability in the screening process.We anticipate this orthogonal Raman coding strategy being generalized to enable efficient high-throughput-out screening of more useful ligands for cell targeting and drug discovery.

关键词： enable throughput allowed

Role of N-formyl peptide receptor 2 in germinal matrix hemorrhage:an intrinsic review of a hematoma resolving pathway

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Neural Regeneration Research 2024年第2期19卷 350-354页

作者： Jerry Flores Jiping tang Department of Physiology&Pharmacology Loma Linda University School of MedicineLoma LindaCAUSA

Germinal matrix hemorrhage is one of the leading causes of morbidity,mortality,and acquired infantile hydrocephalus in preterm infants in the United States,with little progress made in its clinical management.Blood clots have been shown to elicit secondary brain injury after germinal matrix hemorrhage,by disrupting normal cerebrospinal fluid circulation and absorption after germinal matrix hemorrhage causing post-hemorrhagic hydrocephalus development.Current evidence suggests that rapid hematoma resolution is necessary to improve neurological outcomes after hemorrhagic stroke.Various articles have demonstrated the beneficial effects of stimulating the polarization of microglia cells into the M2 phenotype,as it has been suggested that they play an essential role in the rapid phagocytosis of the blood clot after hemorrhagic models of stroke.N-formyl peptide receptor 2(FPR2),a G-protein-coupled receptor,has been shown to be neuroprotective after stroke.FPR2 activation has been associated with the upregulation of phagocytic macrophage clearance,yet its mechanism has not been fully explored.Recent literature suggests that FPR2 may play a role in the stimulation of scavenger receptor CD36.Scavenger receptor CD36 plays a vital role in microglia phagocytic blood clot clearance after germinal matrix hemorrhage.FPR2 has been shown to phosphorylate extracellular-signal-regulated kinase 1/2(ERK1/2),which then promotes the transcription of the dual-specificity protein phosphatase 1(DUSP1)gene.In this review,we present an intrinsic outline of the main components involved in FPR2 stimulation and hematoma resolution after germinal matrix hemorrhage.

关键词： AnxA1 FPR2 GMH hematoma resolution hemorrhagic stroke M1 M2 microglia polarization microglia phagocytosis

Commentary:Mammokine directs beige adipocytes to reserve energy for milk production in breast

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Acta Pharmaceutica Sinica B 2024年第3期14卷 1472-1476页

作者： Lina tang Jianping Ye Metabolic Disease Research Center Zhengzhou University Affiliated Zhengzhou Central HospitalZhengzhou 450007China Research Center for Basic Medicine Academy of Medical SciencesZhengzhou UniversityZhengzhou 450052China

Beige/brown adipocytes play a crucial role in regulating the body’s overall energy balance.The thermogenic function is under the influence of various tissues,including the brain,muscles,and liver.However,the breast t... 详细信息

关键词： Beige Breast Epitheliail cells scRNA-seq Thermogenesis

Single-cell RNA sequencing in juvenile idiopathic arthritis

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Genes & Diseases 2024年第2期11卷 633-644页

作者： Xiwen Luo Xuemei tang Department of Rheumatology and Immunology Children’s Hospital of Chongqing Medical UniversityChongqing 400014China Chongqing Key Laboratory of Child Infection and Immunity Ministry of Education Key Laboratory of Child Development and DisordersNational Clinical Research Center for Child Health and DisordersChina International Science and Technology Cooperation Base of Child Development and Critical DisordersChildren's Hospital of Chongqing Medical UniversityChongqing 400014China

Juvenile idiopathic arthritis (JIA) is one of the most common chronic inflammatory rheumatic diseases in children,with onset before age 16 and lasting for more than 6 weeks.JIA is a highly heterogeneous condition with various consequences for health and quality of life.For some JIA patients,early detection and intervention remain challenging.As a result,further investigation of the complex and unknown mechanisms underlying JIA is required.Advances in technology now allow us to describe the biological heterogeneity and function of individual cell populations in JIA.Through this review,we hope to provide novel ideas and potential targets for the diagnosis and treatment of JIA by summarizing the current findings of single-cell RNA sequencing studies and understanding how the major cell subsets drive JIA pathogenesis.

关键词： Juvenile idiopathic arthritis Macrophage Macrophage activation syndrome Monocyte Single-cell RNA sequencing Synoviocyte T cell