|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Development and validation of a UPLC–MS/MS assay for the determination of gemcitabine and its L-carnitine ester derivative in rat plasma and its application in oral pharmacokinetics显示文摘A simple and rapid UPLC–MS/MS method to simultaneously determine gemcitabine and its L-carnitine ester derivative(2’-deoxy-2’, 2’-difluoro-N-((4-amino-4-oxobutanoyl) oxy)-4-(trimethyl amm-onio) butanoate-cytidine, JDR) in rat plasma was developed and validated.The conventional plasma sample preparation method of nucleoside analogues is solidphase extraction(SPE) which is time-consuming and cost-expensive. In this study, gradient elution with small particles size solid phase was applied to effectively separate gemcitabine and JDR, and protein precipitation pretreatment was adopted to remove plasma protein and extract the analytes with high recovery(>81%). Method validation was performed as per the FDA guidelines, and the standard curves were found to be linear in the range of 5–4000 ng/ml for JDR and 4–4000 ng/ml for gemcitabine, respectively. The lower limit of quantitation(LLOQ)of gemcitabine and JDR was 4 and 5 ng/ml, respectively. The intra-day and inter-day precision and accuracy results were within the acceptable limits. Finally, the developed method was successfully applied to investigate the pharmacokinetic studies of JDR and gemcitabine after oral administration to rats. | Gang Wang Dongyang Zhao Hongxiang Chen Dawei Ding Longfa Kou Lifang Sun Chenxia Hao Xincong Li Kai Jia Qiming Kan Xiaohong Liu Zhonggui He Jin Sun | 2017 | Asian Journal of Pharmaceutical Sciences2017，12，5： | 2 |
| 2 | Study of Technology of Stripping Nickel Coating on NdFeB Permanent Magnet显示文摘The influences of category and density of reagents, temperature and the value of pH in the solution of stripping the nickel coating on NdFeB permanent magnet on the stripping result were studied systematically.The practical formular contains mainly the oxidant m-O2NC6H4SO3Na, the complex reagent ( NaOOCCH2 ) 2N( CH2 ) 2N( CH2COOH)2,the reagent of retarding corrosion KF and the calatyze RL-3 was obtained. | Rao Houzeng Li Guohua Jiang Longfa Lin Guanjie | 2004 | Journal of Rare Earths2004，22，z1： | 1 |
| 3 | Resetting amino acid metabolism of cancer cells by ATB^(0,+)-targeted nanoparticles for enhanced anticancer therapy显示文摘Reprogramed cellular metabolism is one of the most significant hallmarks of cancer.All cancer cells exhibit increased demand for specific amino acids,and become dependent on either an exogenous supply or upregulated de novo synthesis.The resultant enhanced availability of amino acids supports the reprogramed metabolic pathways and fuels the malignant growth and metastasis of cancers by providing energy and critical metabolic intermediates,facilitating anabolism,and activating signaling networks related to cell proliferation and growth.Therefore,pharmacologic blockade of amino acid entry into cancer cells is likely to have a detrimental effect on cancer cell growth.Here we developed a nanoplatform(LJ@Trp-NPs)to therapeutically target two transporters,SLC6A14(ATB^(0,+))and SLC7A5(LAT1),that are known to be essential for the sustenance of amino acid metabolism in most cancers.The LJ@Trp-NPs uses tryptophan to guide SLC6A14-targeted delivery of JPH203,a high-affinity inhibitor of SLC7A5.In the process,SLC6A14 is also down-regulated.We tested the ability of this strategy to synergize with the anticancer efficacy of lapatinib,an inhibitor of EGFR/HER1/HER2-assocated kinase.These studies show that blockade of amino acid entry amplifies the anticancer effect of lapatinib via interference with mTOR signaling,promotion of apoptosis,and suppression of cell proliferation and metastasis.This represents the first study to evaluate the impact of amino acid starvation on the anticancer efficacy of widely used kinase inhibitor. | Longfa Kou Xinyu Jiang Yingying Tang Xing Xia Yingtao Li Aimin Cai Hailun Zheng Hailin Zhang Vadivel Ganapathy Qing Yao Ruijie Chen | 2022 | Bioactive Materials2022，7，3： | 0 |
| 4 | The quantitative proteome atlas of a model cyanobacterium显示文摘Cyanobacteria are a group of oxygenic photosynthetic bacteria with great potentials in biotechnological applications and advantages as models for photosynthesis research. The subcellular localizations of the majority of proteins in any cyanobacteria remain undetermined, representing a major challenge in using cyanobacteria for both basic and industrial researches. Here, using label-free quantitative proteomics, we map 2027 proteins of Synechocystis sp. PCC6803, a model cyanobacterium, to different subcellular compartments and generate a proteome atlas with such information. The atlas leads to numerous unexpected but important findings, including the predominant localization of the histidine kinases Hik33 and Hik27 on the thylakoid but not the plasma membrane. Such information completely changes the concept regarding how the two kinases are activated. Together, the atlas provides subcellular localization information for nearly 60% proteome of a model cyanobacterium, and will serve as an important resource for the cyanobacterial research community. | Jinlong Wang Xiahe Huang Haitao Ge Yan Wang Weiyang Chen Limin Zheng Chengcheng Huang Haomeng Yang Lingyu Li Na Sui Yu Wang Yuanya Zhang Dandan Lu Longfa Fang Wu Xu Yuqiang Jiang Fang Huang Yingchun Wang | 2022 | Journal of Genetics and Genomics2022，49，2： | 0 |
| 5 | Water-responsive gel extends drug retention and facilitates skin penetration for curcumin topical delivery against psoriasis显示文摘Psoriasis is a chronic inflammatory skin disease characterized by erythema,scaling,and skin thickening.Topical drug application is recommended as the first-line treatment.Many formulation strategies have been developed and explored for enhanced topical psoriasis treatment.However,these preparations usually have low viscosity and limited retention on the skin surface,resulting in low drug delivery efficiency and poor patient satisfaction.In this study,we developed the first water-responsive gel(WRG),which has a distinct water-triggered liquid-to-gel phase transition property.Specifically,WRG was kept in a solution state in the absence of water,and the addition of water induced an immediate phase transition and resulted in a high viscosity gel.Curcumin was used as a model drug to investigate the potential of WRG in topical drug delivery against psoriasis.In vitro and in vivo data showed that WRG formulation could not only extend skin retention but also facilitate the drug permeating across the skin.In a mouse model of psoriasis,curcumin loaded WRG(CUR-WRG)effectively ameliorated the symptoms of psoriasis and exerted a potent anti-psoriasis effect by extending drug retention and facilitating drug penetration.Further mechanism study demonstrated that the anti-hyperplasia,anti-inflammation,anti-angiogenesis,anti-oxidation,and immunomodulation properties of curcumin were amplified by enhanced topical drug delivery efficiency.Notably,neglectable local or systemic toxicity was observed for CUR-WRG application.This study suggests that WRG is a promising formulation for topically psoriasis treatment. | Qing Yao Yuanyuan Zhai Zhimin He Qian Wang Lining Sun Tuyue Sun Leyao Lv Yingtao Li Jiyong Yang Donghui Lv Ruijie Chen Hailin Zhang Xiang Luo Longfa Kou | 2023 | Asian Journal of Pharmaceutical Sciences2023，18，2： | 0 |
| 6 | Determination of total flavonoids and its antioxidant activity in the exocarp of Aronia melanocarpa显示文摘As a kind of berry food rich in flavonoids,the determination method of total flavonoids content of Aronia melanocarpa is of great significance.This paper compares the applicability of NaNO_(2)-Al(NO_(3))_(3)-NaOH colorimetry and AlCl_(3)colorimetry to total flavonoids content of the exocarp of Aronia melanocarpa by Ultraviolet-visible Spectrophotometry.At the same time,we determined hydroxyl radical(OH·-)inhibition rate,superoxide anion radical(O_(2)·-)inhibition rate and 1,1-diphenyl-2-picrylhydrazyl radical free radical(DPPH·)scavenging rate of total flavonoids extracted from Aronia melanocarpa.It is found that AlCl_(3)colorimetry has good repeatability,precision,and accuracy.The method is suitable for the determination of total flavonoids in the exocarp of Aronia melanocarpa.Thus,by the established method the content of total flavonoids in the exocarp of Aronia melanocarpa was determined as high as(36.711±0.034)mg/g.The results of antioxidant activity showed superoxide anion radical scavenging ability,hydroxyl radical scavenging ability and DPPH radical scavenging ability of the total flavonoids extract reached 45.33%,87.87%and 98.05%,respectively,indicating that it had good antioxidant activity. | Longfa Li Weizhuo Xu Wei Xu Ming Song | 2022 | Journal of Polyphenols2022，4，2： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员