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  • Polymeric Micelles with Endosome Escape and Redox-Responsive Functions for Enhanced Intracellular Drug Delivery
    Polymeric Micelles with Endosome Escape and Redox-Responsive Functions for Enhanced Intracellular Drug Delivery July 11,2023.
    J Biomed Nanotechnol. 2019 Feb 1;15(2):373-381. doi: 10.1166/jbn.2019.2693. Polymeric Micelles with Endosome Escape and Redox-Responsive Functions for Enhanced Intracellular Drug Delivery Jing Liu, Xixi Ai, Huaping Zhang, Weiling Zhuo, Peng Mi Abstract Efficient intracellular delivery of bioactive compounds into cancer cells is critically important for treatment, as some compounds only validate for therapy after entering cancer cells. The boron neutron capture therapy (BNCT) applies thermal neutron irradiation to react with 10B-compounds that existed inside cancer cells to generate secondary killing irradiations to eradicate cancer cells. The effective distance of the emitted secondary killing irradiations is as long as a cellular diameter, which requires the cellular uptake of 10B-compounds for efficient tumor BNCT. However, current clinical approved 10B-compound of sodium borocaptate (BSH) exhibits low cellular uptake by cancer cells, which limits the therapeutic efficacy. Herein, the multifunctional polymeric micelles with endosome escape and redox-responsive functions have been developed by self-assembly from the BSH-conjugated block copolymers for enhanced delivery of BSH into cancer cells. The BSH-loaded polymeric micelles (BSH/micelle) showed a hydrodynamic diameter around 50 nm, and the size distribution was monodisperse. The BSH/micelle were stable in normal physiological environment, while the BSH could be released in responding to high level of redox-potential in cancer cells. Besides, intracellular delivery of BSH was highly promoted by BSH/micelle through the endosome escape function of micelles, which further increased the tumor therapeutic efficacy by BNCT. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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  • pH-sensitive and folic acid-targeted MPEG-PHIS/FA-PEG-VE mixed micelles for the delivery of PTX-VE and their antitumor activity
    pH-sensitive and folic acid-targeted MPEG-PHIS/FA-PEG-VE mixed micelles for the delivery of PTX-VE and their antitumor activity July 7,2023.
    Int J Nanomedicine. 2017 Aug 16;12:5863-5877.     doi: 10.2147/IJN.S141982.     eCollection 2017. pH-sensitive and folic acid-targeted MPEG-PHIS/FA-PEG-VE mixed micelles for the delivery of PTX-VE and their antitumor activity Yan Di 1, Ting Li 1, Zhihong Zhu 1, Fen Chen 2, Lianqun Jia 2, Wenbing Liu 3, Xiumei Gai 1, Yingying Wang 1, Weisan Pan 1, Xinggang Yang 1 Abstract The aim of this study was to simultaneously introduce pH sensitivity and folic acid (FA) targeting into a micelle system to achieve quick drug release and to enhance its accumulation in tumor cells.     Paclitaxel-(+)-α-tocopherol (PTX-VE)-loaded mixed micelles (PHIS/FA/PM) fabricated by poly(ethylene glycol) methyl ether-poly(histidine) (MPEG-PHIS) and folic acid-poly(ethylene glycol)-(+)-α-tocopherol (FA-PEG-VE) were characterized by dynamic light scattering and transmission electron microscopy (TEM).     The mixed micelles had a spherical morphology with an average diameter of 137.0±6.70 nm and a zeta potential of -48.7±4.25 mV.     The drug encapsulation and loading efficiencies were 91.06%±2.45% and 5.28%±0.30%, respectively.     The pH sensitivity was confirmed by changes in particle size, critical micelle concentration, and transmittance as a function of pH. MTT assay showed that PHIS/FA/PM had higher cytotoxicity at pH 6.0 than at pH 7.4, and lower cytotoxicity in the presence of free FA.     Confocal laser scanning microscope images demonstrated a time-dependent and FA-inhibited cellular uptake.     In vivo imaging confirmed that the mixed micelles targeted accumulation at tumor sites and the tumor inhibition rate was 85.97%.     The results proved that the mixed micelle system fabricated by MPEG-PHIS and FA-PEG-VE is a promising approach to improve antitumor efficacy. Keywords: drug delivery;     folic acid targeting;     in vivo antitumor activity;     mixed micelles;     pH sensitive. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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  • Multimodal Upconversion Nanoplatform with a Mitochondria-Targeted Property for Improved Photodynamic Therapy of Cancer Cells
    Multimodal Upconversion Nanoplatform with a Mitochondria-Targeted Property for Improved Photodynamic Therapy of Cancer Cells July 4,2023.
    Inorg Chem. 2016 Apr 18;55(8):3872-80.  doi: 10.1021/acs.inorgchem.6b00020.  Epub 2016 Apr 6. Multimodal Upconversion Nanoplatform with a Mitochondria-Targeted Property for Improved Photodynamic Therapy of Cancer Cells Xiaoman Zhang, Fujin Ai, Tianying Sun, Feng Wang, Guangyu Zhu Abstract Upconversion nanoparticles (UCNPs) with the capacity to emit high-energy visible or UV light under low-energy near-infrared excitation have been extensively explored for biomedical applications including imaging and photodynamic therapy (PDT) against cancer.  Enhanced cellular uptake and controlled subcellular localization of a UCNP-based PDT system are desired to broaden the biomedical applications of the system and to increase its PDT effect.  Herein, we build a multimodal nanoplatform with enhanced therapeutic efficiency based on 808 nm excited NaYbF4:Nd@NaGdF4:Yb/Er@NaGdF4 core-shell-shell nanoparticles that have a minimized overheating effect.  The photosensitizer pyropheophorbide a (Ppa) is loaded onto the nanoparticles capped with biocompatible polymers, and the nanoplatform is functionalized with transcriptional activator peptides as targeting moieties.  Significantly increased cellular uptake of the nanoparticles and dramatically elevated photocytotoxicity are achieved.  Remarkably, colocalization of Ppa with mitochondria, a crucial subcellular organelle as a target of PDT, is proven and quantified.  The subsequent damage to mitochondria caused by this colocalization is also confirmed to be significant.  Our work provides a comprehensively improved UCNP-based nanoplatform that maintains great biocompatibility but shows higher photocytotoxicity under irradiation and superior imaging capabilities, which increases the biomedical values of UCNPs as both nanoprobes and carriers of photosensitizers toward mitochondria for PDT. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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  • Ligand-installed anti-VEGF genomic nanocarriers for effective gene therapy of primary and metastatic tumors
    Ligand-installed anti-VEGF genomic nanocarriers for effective gene therapy of primary and metastatic tumors June 13,2023.
    J Control Release. 2020 Apr 10;320:314-327.  doi: 10.1016/j.jconrel.2020.01.026.  Epub 2020 Jan 16. Ligand-installed anti-VEGF genomic nanocarriers for effective gene therapy of primary and metastatic tumors Huaping Zhang, Jing Liu, Qixian Chen, Peng Mi Abstract The systemic dosage regimen exhibited low therapeutic efficacy and incurred severe adverse effect, thus, the development of tumor-targeted therapeutics is crucial important for tumor precision therapy.  Herein, the active targeted modulation of tumor microenvironments was schemed by developing hyaluronic acid-installed genomic nanocarriers (HA-NPs) for effectively ablation of both primary and metastatic tumors through anti-vascular endothelial growth factor (anti-VEGF) approach.  The anti-VEGF genomic payloads were strategically packaged into the well-defined synthetic nanocarriers by layer-by-layer preparation strategy, exhibiting high colloidal stability and much lower cell viability than the cationic gene carriers.  Besides, the HA-NPs could specifically and efficiently internalize with cancer cells for efficient intracellular gene delivery, leading to high gene transfection efficacy.  Moreover, it further demonstrated efficient extravasation, high accumulation and deep penetration in tumors, which markedly facilitated tumor-targeted expression of anti-VEGF genomic payloads for inhabitation of neo-vasculature, consecutively contributing to potent ablation of solid tumors.  In addition, the ligand-installed nanocarriers facilitated systemic treatment of melanoma lung metastasis by the expressed anti-VEGF proteins, which were extensively spread along blood circulation and metastatic niches to diminish the formation of neovasculature for tumorigenesis.  Therefore, the proposed anti-VEGF genomic nanocarriers could shed intriguing implication in effectively treatment of primary tumors and metastasis. Keywords: Anti-VEGF;  Gene delivery;  Layer-by-layer;  Metastasis;  Nanoparticles;  Tumor. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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  • Layered double hydroxide modified by PEGylated hyaluronic acid as a hybrid nanocarrier for targeted drug delivery
    Layered double hydroxide modified by PEGylated hyaluronic acid as a hybrid nanocarrier for targeted drug delivery May 19,2023.
    Published: 08 June 2016 Layered double hydroxide modified by PEGylated hyaluronic acid as a hybrid nanocarrier for targeted drug delivery Anjie Dong  (董岸杰), Xue Li  (李 雪), Weiwei Wang  (王伟伟), Shangcong Han  (韩尚聪), Jianfeng Liu  (刘鉴锋), Jinjian Liu  (刘金剑), Junqiang Zhao  (赵军强), Shuxin Xu  (许舒欣) & Liandong Deng  (邓联东) Transactions of Tianjin University volume 22, pages237–246 (2016) Abstract In recent years, organic-inorganic hybrid nanocarriers are explored for effective drug delivery and preferable disease treatments. In this study, using 5-fluorouracil(5-FU)as electronegative model drug, a new type of organic-inorganic hybrid drug delivery system(LDH/HA-PEG/5-FU)was conceived and manufactured by the adsorption of PEGylated hyaluronic acid(HA-PEG)on the surface of layered double hydroxide(LDH, prepared via hydrothermal method)and the intercalation of 5-FU in the interlamination of LDH via ion exchange strategy. The drug loading amount of LDH/HA-PEG/5-FU achieved as high as 34.2%. LDH, LDH/5-FU and LDH/HA-PEG/5- FU were characterized by FT-IR, XRD, TGA, laser particle size analyzer and SEM. With the benefit of pHdegradable feature of LDH and enzyme-degradable feature of HA, LDH/HA-PEG/5-FU showed pH-degradable and enzyme-degradable capacity in in vitro drug release. Moreover, the drug carrier LDH/HA-PEG contained biocompatible PEG and tumor-targeted HA, resulting in lower cytotoxicity and better endocytosis compared with LDH in vitro. It was suggested that the organic-inorganic hybrid drug delivery system, which was endowed with the properties of controlled release, low toxicity and tumor-targeting delivery for ameliorative cancer therapy, was advisable and might be applied further to fulfill other treatments. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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  • Elongated Nanoparticle Aggregates in Cancer Cells for Mechanical Destruction with Low Frequency Rotating Magnetic Field
    Elongated Nanoparticle Aggregates in Cancer Cells for Mechanical Destruction with Low Frequency Rotating Magnetic Field May 6,2023.
    Theranostics. 2017 Apr 10;7(6):1735-1748. doi: 10.7150/thno.18352. eCollection 2017. Elongated Nanoparticle Aggregates in Cancer Cells for Mechanical Destruction with Low Frequency Rotating Magnetic Field Yajing Shen, Congyu Wu, Taro Q P Uyeda, Gustavo R Plaza, Bin Liu, Yu Han, Maciej S Lesniak, Yu Cheng Abstract Magnetic nanoparticles (MNPs) functionalized with targeting moieties can recognize specific cell components and induce mechanical actuation under magnetic field. Their size is adequate for reaching tumors and targeting cancer cells. However, due to the nanometric size, the force generated by MNPs is smaller than the force required for largely disrupting key components of cells. Here, we show the magnetic assembly process of the nanoparticles inside the cells, to form elongated aggregates with the size required to produce elevated mechanical forces. We synthesized iron oxide nanoparticles doped with zinc, to obtain high magnetization, and functionalized with the epidermal growth factor (EGF) peptide for targeting cancer cells. Under a low frequency rotating magnetic field at 15 Hz and 40 mT, the internalized EGF-MNPs formed elongated aggregates and generated hundreds of pN to dramatically damage the plasma and lysosomal membranes. The physical disruption, including leakage of lysosomal hydrolases into the cytosol, led to programmed cell death and necrosis. Our work provides a novel strategy of designing magnetic nanomedicines for mechanical destruction of cancer cells. Keywords: Brain cancer cells; Functionalized magnetic nanoparticles; Lysosome damage; Magneto-mechanical actuation; Plasma membrane damage. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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  • Curcumin-coordinated nanoparticles with improved stability for reactive oxygen species-responsive drug delivery in lung cancer therapy
    Curcumin-coordinated nanoparticles with improved stability for reactive oxygen species-responsive drug delivery in lung cancer therapy April 28,2023.
    Int J Nanomedicine. 2017 Jan 25;12:855-869. doi: 10.2147/IJN.S122678. eCollection 2017. Curcumin-coordinated nanoparticles with improved stability for reactive oxygen species-responsive drug delivery in lung cancer therapy Cheng-Qiong Luo, Lei Xing, Peng-Fei Cui, Jian-Bin Qiao, Yu-Jing He, Bao-An Chen, Liang Jin, Hu-Lin Jiang Abstract Background: The natural compound curcumin (Cur) can regulate growth inhibition and apoptosis in various cancer cell lines, although its clinical applications are restricted by extreme water insolubility and instability. To overcome these hurdles, we fabricated a Cur-coordinated reactive oxygen species (ROS)-responsive nanoparticle using the interaction between boronic acid and Cur. Materials and methods: We synthesized a highly biocompatible 4-(hydroxymethyl) phenylboronic acid (HPBA)-modified poly(ethylene glycol) (PEG)-grafted poly(acrylic acid) polymer (PPH) and fabricated a Cur-coordinated ROS-responsive nanoparticle (denoted by PPHC) based on the interaction between boronic acid and Cur. The mean diameter of the Cur-coordinated PPHC nanoparticle was 163.8 nm and its zeta potential was -0.31 mV. The Cur-coordinated PPHC nanoparticle improved Cur stability in physiological environment and could timely release Cur in response to hydrogen peroxide (H2O2). PPHC nanoparticles demonstrated potent antiproliferative effect in vitro in A549 cancer cells. Furthermore, the viability of cells treated with PPHC nanoparticles was significantly increased in the presence of N-acetyl-cysteine (NAC), which blocks Cur release through ROS inhibition. Simultaneously, the ROS level measured in A549 cells after incubation with PPHC nanoparticles exhibited an obvious downregulation, which further proved that ROS depression indeed influenced the therapeutic effect of Cur in PPHC nanoparticles. Moreover, pretreatment with phosphate-buffered saline (PBS) significantly impaired the cytotoxic effect of Cur in A549 cells in vitro while causing less damage to the activity of Cur in PPHC nanoparticle. Conclusion: The Cur-coordinated nanoparticles developed in this study improved Cur stability, which could further release Cur in a ROS-dependent manner in cancer cells. Keywords: coordination; curcumin; hydrogen peroxide; phenylboronic acid; stimuli-responsive. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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  • Co-delivery of docetaxel and curcumin prodrug via dual-targeted nanoparticles with synergistic antitumor activity against prostate cancer
    Co-delivery of docetaxel and curcumin prodrug via dual-targeted nanoparticles with synergistic antitumor activity against prostate cancer April 26,2023.
    Biomed Pharmacother. 2017 Apr;88:374-383. doi: 10.1016/j.biopha.2016.12.138. Epub 2017 Jan 22. Co-delivery of docetaxel and curcumin prodrug via dual-targeted nanoparticles with synergistic antitumor activity against prostate cancer Jieke Yan, Yuzhen Wang, Yuxiu Jia, Shuangde Liu, Chuan Tian, Wengu Pan, Xiaoli Liu, Hongwei Wang Abstract Purpose: Combination therapy is increasingly used as a primary cancer treatment regimen. In this report, we designed EGFR peptide decorated nanoparticles (NPs) to co-deliver docetaxel (DTX) and pH sensitive curcumin (CUR) prodrug for the treatment of prostate cancer. Results: EGFR peptide (GE11) targeted, pH sensitive, DTX and CUR prodrug NPs (GE11-DTX-CUR NPs) had an average diameter of 167nm and a zeta potential of -37.5mV. The particle size of the NPs was adequately maintained in serum and a sustained drug release pattern was observed. Improved inhibition of cancer cell and tumor tissue growth was shown in the GE11-DTX-CUR NPs group compared to the other groups. Conclusion: It can be summarized that DTX and CUR prodrug could be delivered into tumor cells simultaneously by the GE 11 targeting and the EPR effect of NPs. The resulting GE11-DTX-CUR NPs is a promising system for the synergistic antitumor treatment of prostate cancer. Keywords: Dual-targeted nanoparticles; EGFR-mediated endocytosis; Prostate cancer; Synergistic combination therapy; Targeted delivery system. Related products Abbreviation: mPEG-NH2 Name: Methoxypoly(ethylene glycol) amine For more product information, please contact us at: US Tel: 1-844-782-5734 US Tel: 1-844-QUAL-PEG CHN Tel: 400-918-9898 Email: sales@sinopeg.com
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