Systematic Evaluation and Meta-Analysis of the Effect of Gynostemma pentaphyllum on Clinical Indexes of Hyperlipidemia

Yu-Long Gu,Xiang-Lan Piao 한국생약학회 2023 Natural Product Sciences Vol.29 No.4

The purpose of this study was to explore the clinical efficacy and safety of Gynostemma pentaphyllum (G. pentaphyllum) in the treatment of hyperlipidemia, and to provide systematic evaluation basis for clinical application. CNKI, Wanfang Data, VIP, Web of science, PubMed, Embase and Cochrane Library were searched for randomized controlled trials (RCTs) about G. pentaphyllum in the treatment of hyperlipidemia. Review Manager 5.4 were used for statistical analysis. Through reading topics, abstracts, and full texts, 27 papers with 2311 cases involved that met the inclusion and exclusion criteria were finally included for the analysis. In terms of curative effect, the effect of G. pentaphyllum alone in increasing high density lipoprotein (HDL) index was better than that of conventional treatment, and the effect of reducing total cholesterol (TC), triglyceride (TG) and low density lipoprotein (LDL) was similar to that of conventional treatment. There was a synergistic effect between G. pentaphyllum and conventional drugs, and the combination of G. pentaphyllum and conventional drugs was superior to conventional treatment in reducing TG and increasing HDL. G. pentaphyllum can also decrease the levels of serum glutamic pyruvic transaminase and glutamic oxaloacetic transaminase in the treatment of hyperlipidemia, indicating a certain protective function of the liver. In terms of safety, there were fewer cases of adverse reactions in the G. pentaphyllum treatment group, and the adverse reaction events reported in the literature was mild. According to the results of meta-analysis, G. pentaphyllum was effective in the treatment of hyperlipidemia, and it has the potential to be combined with traditional drugs, has a certain liver protection function, and was superior to traditional drugs in the treatment of hyperlipidemia.

PET Composite Fiber Membranes Modified with Modified Nanoscale ZnO Exhibit Synergistic Antibacterial Effects

Long Yu,Dan Liu,Peng Gu,Kunlin Chen,Hua Qiu 한국섬유공학회 2023 Fibers and polymers Vol.24 No.11

With the global prevalence of infectious diseases, the development of antimicrobial textiles has become imperative. In this study, a synergistic antibacterial powder of IZnO–SCSB was obtained by modifying zinc oxide (ZnO) nanoparticles with 3-isocyanatopropyltriethoxysilane (IPTS) and chitosan cinnamaldehyde Schiff base (SCSB). The powder was then mixed with a PET solution and a PET/IZnO–SCSB composite antibacterial fiber membrane was prepared using electrospinning. This composite fiber membrane demonstrates excellent mechanical properties, breathability, hydrophobicity, and antibacterial effects. The tensile strength and elongation at break were 2.4 MPa and 240.9%, respectively. When the membrane was loaded with 3 wt% of IZnO–SCSB, the antimicrobial rates against Gram-positive (S. aureus) and Gram-negative (E. coli) reached 99.80% and 97.08%, respectively. Therefore, this composite antibacterial fiber membrane has broad application prospects in antibacterial textiles such as masks and medical gauze.

Benchtop fabrication of three-dimensional reconfigurable microfluidic devices from paper-polymer composite.

Han, Yu Long,Wang, Wenqi,Hu, Jie,Huang, Guoyou,Wang, Shuqi,Lee, Won Gu,Lu, Tian Jian,Xu, Feng Royal Society of Chemistry 2013 Lab on a chip Vol.13 No.24

<P>We presented a benchtop technique that can fabricate reconfigurable, three-dimensional (3D) microfluidic devices made from a soft paper-polymer composite. This fabrication approach can produce microchannels at a minimal width of 100 μm and can be used to prototype 3D microfluidic devices by simple bending and stretching. The entire fabrication process can be finished in 2 hours on a laboratory bench without the need for special equipment involved in lithography. Various functional microfluidic devices (e.g., droplet generator and reconfigurable electronic circuit) were prepared using this paper-polymer hybrid microfluidic system. The developed method can be applied in a wide range of standard applications and emerging technologies such as liquid-phase electronics.</P>

Synthesis, Characterization, and Drug Delivery of Amphiphilic Poly{(lactic acid)-co-[(glycolic acid)-alt-(L-glutamic acid)]}-g-Poly(ethylene glycol)

Zuxiao Yu,Zhongwei Gu,Bin He,Chunyan Long,Rong Liu,Mingming Sheng,Gang Wang,James. Z. Tang 한국고분자학회 2012 Macromolecular Research Vol.20 No.3

This paper discusses the use of a novel amphiphilic graft polymer poly{(lactic acid)-co-[(glycolic acid)-alt-(Lglutamic acid)]}-g-monomethyl poly(ethylene glycol) (PLGG-g-mPEG) as a drug carrier. PLGG was synthesized through the ring-opening polymerization of L-lactide (LLA) and (3s)-benzoxylcarbonylethyl-morpholine-2,5-dione (BEMD) using Sn(Oct)2 as a catalyst and it was subsequently deprotected via hydrogenolysis in the presence of Pd/C. A series of monomethyl poly(ethylene glycol) (PEG) with the molecular weights of 2,000, 1,100, and 500 were immobilized on the carboxyl groups of PLGG. These PEGylated graft derivatives were characterized using proton nuclear magnetic resonance spectra (1H NMR), Fourier transform infrared spectroscopy (FTIR), and gel permeation chromatography (GPC). The critical micelle concentrations (CMCs) of the amphiphilic copolymers were tested by the fluorescence probe technique and the CMCs were 2.3, 1.0, and 0.32 μg/mL, respectively. Transmission electronic microscopy (TEM) and dynamic light scattering (DLS) images revealed that the micelles were homogeneous spherical nanoparticles and the sizes of the micelles were distributed across a range of 80 to 22 nm. Anticancer drug doxorubicin (DOX) was loaded into the micelles. The in vitro release profiles showed that the sustaining release of the drugloaded micelles could last over 7 days. The in vitro cytotoxicity assay of the DOX-loaded micelles against HepG2cells was assessed by methyl thiazolyl tetrazolium (MTT) assays. The results demonstrated that the drug-loaded micelles exhibited a high level of inhibition activity on cancer cells. The confocal microscopy images of HepG2 cells showed that DOX released from the micelles could be delivered into cell nuclei. PLGG-g-mPEG micelles are promising potential carriers for delivering anticancer drugs.

Polymer Self-Assembly into Unique Fractal Nanostructures in Solution by a One-Shot Synthetic Procedure

Shin, Suyong,Gu, Ming-Long,Yu, Chin-Yang,Jeon, Jongseol,Lee, Eunji,Choi, Tae-Lim American Chemical Society 2018 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.140 No.1

<P>A fractal nanostructure having a high surface area is potentially useful in sensors, catalysts, functional coatings, and biomedical and electronic applications. Preparation of fractal nanostructures on solid substrates has been reported using various inorganic or organic compounds. However, achieving such a process using polymers in solution has been extremely challenging. Here, we report a simple one-shot preparation of polymer fractal nanostructures in solution via an unprecedented assembly mechanism controlled by polymerization and self-assembly kinetics. This was possible only because one monomer was significantly more reactive than the other, thereby easily forming a diblock copolymer microstructure. Then, the second insoluble block containing poly(<I>p</I>-phenylenevinylene) (PPV) without any side chains spontaneously underwent self-assembly during polymerization by an in situ nanoparticlization of conjugated polymers (INCP) method. The formation of fractal structures in solution was confirmed by various imaging techniques such as atomic force microscopy, transmission electron microscopy (TEM), and cryogenic TEM. The diffusion-limited aggregation theory was adopted to explain the branching patterns of the fractal nanostructures according to the changes in polymerization conditions such as the monomer concentration and the presence of additives. Finally, after detailed kinetic analyses, we proposed a plausible mechanism for the formation of unique fractal nanostructures, where the gradual formation and continuous growth of micelles in a chain-growth-like manner were accounted for.</P> [FIG OMISSION]</BR>

Trapidil determines the fate of RHF rats through inhibition of ER stress

Yilin Wang,Yu Wang,Chengxi Wei,Quan Wan,Zhifei Fan,Liying Xuan,Wanru Geng,Liqun Shao,Jie Long,Junyi Gu,Ming Zhao 대한약학회 2020 Archives of Pharmacal Research Vol.43 No.4

Pulmonary arterial hypertension is a fatal disease,especially when it causes right heart failure (RHF). However, it is difficult to treat. It has been reported thattrapidil (Tra) can improve the redox balance and cardiacconditions. In this study, we investigated the effect of Tra onRHF induced by monocrotaline (MCT) in rats. Male Wistarrats were treated with MCT or Tra. Treatment lasted 28 days,then rats were euthanized after echocardiography and catheterization. Subsequently, lungs and right ventricular myocardiawere evaluated by hematoxylin and eosin, Masson,and TUNEL staining. Protein expression was detected bywestern blotting. We found remarkably expanded rightventricle end-diastolic volume, decreased partial pressureof oxygen (PaO2), increased partial pressure of carbondioxide (PaCO2), right ventricular systolic pressure, meanpulmonary arterial pressure, lung/body weight, and liver/body weight in the RHF rat group, as well as increases inthe apoptosis rate and the expression of endoplasmic reticulumstress (ERS)-related proteins. However, these changes were significantly inhibited by Tra. Our data suggested thatinhibition of ERS is essential for improving RHF, and thattherapeutic intervention of Tra in RHF rats works by reducingERS.

Mobile-Business ; The Forecasting of the Mobile Internet in Taiwan - the Perspective on the Diffusion Model

Chih Peng Chu,Jin Gu Pan,Fang Mei Liu,Yu Fan Lin,Long Fon Shieh 한국경영정보학회 2005 한국경영정보학회 학술대회논문집 Vol.2005 No.-

Systematic Evaluation and Meta-Analysis of the Effect of Gynostemma pentaphyllum on Clinical Indexes of Hyperlipidemia

Hao-Tian Luo,Man-Yu Xiao,Wen-Jing Pei,Kang-Le Bi,Peng Xie,Yu-Long Gu,Xiang-Lan Piao 한국생약학회 2023 Natural Product Sciences Vol.29 No.4

Molecular and Cellular Microbiology / Biomedical Sciences : Surface-Displayed IL-10 by Recombinant Lactobacillus plantarum Reduces Th1 Responses of RAW264.7 Cells Stimulated with Poly(I:C) or LPS

( Ruo Peng Cai ),( Yan Long Jiang ),( Wei Yang ),( Wen Tao Yang ),( Shao Hua Shi ),( Chun Wei Shi ),( Jing Tao Hu ),( Wei Gu ),( Li Ping Ye ),( Fang Yu Zhou ),( Qing Long Gong ),( Wen Yu Han ),( Guil 한국미생물 · 생명공학회 2016 Journal of microbiology and biotechnology Vol.26 No.2

Recently, poly-γ-glutamic acid synthetase A (pgsA) has been applied to display exogenous proteins on the surface of Lactobacillus casei or Lactococcus lactis, which results in a surfacedisplayed component of bacteria. However, the ability of carrying genes encoded by plasmids and the expression efficiency of recombinant bacteria can be somewhat affected by the longer gene length of pgsA (1,143 bp); therefore, a truncated gene, pgsA, was generated based on the characteristics of pgsA by computational analysis. Using murine IL-10 as an exogenous gene, recombinant Lactobacillus plantarum was constructed and the capacity of the surface-displayed protein and functional differences between exogenous proteins expressed by these strains were evaluated. Surface expression of IL-10 on both recombinant bacteria with anchorins and the higher expression levels in L. plantarum-pgsA’-IL-10 were confirmed by western blot assay. Most importantly, up-regulation of IL-1β, IL-6, TNF-α, IFN-γ, and the nuclear transcription factor NF-κB p65 in RAW264.7 cells after stimulation with Poly(I:C) or LPS was exacerbated after co-culture with L. plantarum-pgsA. By contrast, IL-10 expressed by these recombinant strains could reduce these factors, and the expression of these factors was associated with recombinant strains that expressed anchorin (especially in L. plantarum-pgsA’-IL-10) and was significantly lower compared with the anchorin-free strains. These findings indicated that exogenous proteins could be successfully displayed on the surface of L. plantarum by pgsA or pgsA’, and the expression of recombinant bacteria with pgsA’ was superior compared with bacteria with pgsA.

Identification of a Novel Human Lysophosphatidic Acid Acyltransferase, LPAAT-theta, Which Activates mTOR Pathway

Tang, Wenwen,Yuan, Jian,Chen, Xinya,Gu, Xiuting,Luo, Kuntian,Li, Jie,Wan, Bo,Wang, Yingli,Yu, Long Korean Society for Biochemistry and Molecular Biol 2006 Journal of biochemistry and molecular biology Vol.39 No.5

Lysophosphatidic acid acyltransferase (LPAAT) is an intrinsic membrane protein that catalyzes the synthesis of phosphatidic acid (PA) from lysophosphatidic acid (LPA). It is well known that LPAAT is involved in lipid biosynthesis, while its role in tumour progression has been of emerging interest in the last few years. To date, seven members of the LPAAT gene family have been found in human. Here we report a novel LPAAT member, designated as LPAAT-theta, which was 2728 base pairs in length and contained an open reading frame (ORF) encoding 434 amino acids. The LPAAT-theta gene consisted of 12 exons and 11 introns, and mapped to chromosome 4q21.23. LPAAT-theta was ubiquitously expressed in 18 human tissues by RT-PCR analysis. Subcellular localization of LPAAT-theta-EGFP fusion protein revealed that LPAAT-theta was distributed primarily in the endoplasmic reticulum (ER) of COS-7 cells. Furthermore, we found that the overexpression of LPAAT-theta can induce mTOR-dependent p70S6K phosphorylation on Thr389 and 4EBP1 phosphorylation on Ser65 in HEK293T cells.