02475nas a2200265 4500008004100000022001400041245013200055210006900187260000900256300001100265490000800276520158300284653002401867653000801891653001301899653001801912653001001930653002301940100002501963700002701988700002602015700001902041700002302060856012602083 2020 eng d a0378-517300aStimuli-responsive biodegradable polyurethane nano-constructs as a potential triggered drug delivery vehicle for cancer therapy0 aStimuliresponsive biodegradable polyurethane nanoconstructs as a cOCT  a1197810 v5883 a

Polyurethanes (PUs) constitute an essential class of stimuli-responsive and biodegradable material, which has significantly contributed to the advancement of polymers utilization in the biomedical field. The bio-erodible PUs construct an active corridor for facilitating drug into tumor cells, which has significantly impacted the progression of nano-micellar delivery systems. The self-assembled colloidal PUs pose distinctive features such as enhancing the solubility of hydrophobic chemotherapeutics, rapid cellular uptake, triggered erosion and drug release, bio-stimulus sensitivity, improvement in the targeting and proficiency of bioactive. Cationic PUs can easily be condensed with genetic material to form polyplexes and have shown excellent transfection efficiency for potential gene therapy against various cancers. Their modifiable chemistry offers a tool to impart the desired multifunctionality such as biocompatibility, sensitivity to pH, redox, temperature, enzyme, etc. and ligand conjugation for active targeting. These diverse exceptional properties make them excellent nano-carrier for a variety of bioactive, including chemotherapeutic drugs, DNA, RNA, and diagnostic moieties to the target tissue or cells. The PUs based nano-devices have certainly uncovered the path to achieve ideal systems for controlled personalized therapy. The literature discussed in this review shed light on the research innovations carried out in the last ten years for the development of multifunctional PUs for triggered delivery of bioactive to treat various cancers.

10aCancer nanomedicine10aGSH10amicelles10aPolyurathanes10aredox10aStimuli-responsive1 aGajbhiye, Kavita, R.1 aChaudhari, Bhushan, P.1 aPokharkar, Varsha, B.1 aPawar, Atmaram1 aGajbhiye, Virendra uhttps://library.ncl.res.in/content/stimuli-responsive-biodegradable-polyurethane-nano-constructs-potential-triggered-drug03002nas a2200265 4500008004100000022001400041245014400055210006900199260000800268300001400276490000800290520209300298653001502391653000802406653003602414653001202450653001902462653001502481653002302496100001802519700001802537700002702555700002302582856013102605 2023 eng d a0022-354900aAptamer tethered bio-responsive mesoporous silica nanoparticles for efficient targeted delivery of paclitaxel to treat ovarian cancer cells0 aAptamer tethered bioresponsive mesoporous silica nanoparticles f cMAY a1450-14590 v1123 a

Ovarian cancer is the leading cause of cancer deaths in female patients. The current therapeutics in ovarian cancer are limited and inefficient in curing the disease. To tackle this, we have synthesized tetrasulfide deriv-ative of silica doped, biodegradable, glutathione-responsive targeted mesoporous silica nanoparticles modi-fied with heterobifunctional polyethylene glycol as a linker and mucin-1 aptamer for triggered paclitaxel delivery to the ovarian cancer cells. Degradable mesoporous silica nanoparticles were synthesized by a modi-fied sol-gel method with tetraethyl orthosilicate and Bis (triethoxysilylpropyl) tetrasulfide. The degradable mesoporous silica nanoparticles were characterized by dynamic light scattering, Fourier-transform infrared spectroscopy, Scanning electron microscopy and Transmission electron microscopy. The degradable mesopo-rous silica nanoparticles had good paclitaxel encapsulation efficiency and glutathione-responsive paclitaxel release ability. The glutathione utilization assay and visual destruction observed within 10 days in transmis-sion electron microscopy images confirmed the degradation of the mesoporous silica nanoparticles in the tumor cell environment. The targeted degradable mesoporous silica nanoparticles were efficiently taken up by ovarian cancer cell lines OVACAR-3 and PA-1. The cytotoxicity of bare mesoporous silica nanoparticles evaluated on NIH-3T3 cell line showed good biocompatibility (>90% cell viability). Significant toxicity on OVACAR-3 (IC50 25.66 nM) and PA-1 (IC50 42.93 nM) cell lines was observed when treated with paclitaxel-loaded targeted degradable mesoporous silica nanoparticles. Results of this study demonstrated that mucin-1 targeted, glutathione-responsive mesoporous silica nanoparticles loaded with paclitaxel had a significant antitumor effect on ovarian cancer cells. All these findings demonstrated that developed nano-formulation could be suitable for ovarian cancer treatment. & COPY; 2023 American Pharmacists Association. Published by Elsevier Inc. All rights reserved.

10aDegradable10aGSH10aMesoporous silica nanoparticles10aMucin-110aOvarian cancer10aPaclitaxel10aStimuli-responsive1 aSalve, Rajesh1 aKumar, Pramod1 aChaudhari, Bhushan, P.1 aGajbhiye, Virendra uhttps://library.ncl.res.in/content/aptamer-tethered-bio-responsive-mesoporous-silica-nanoparticles-efficient-targeted-delivery02223nas a2200241 4500008004100000245016000041210006900201260000800270300001100278490000800289520133700297653002101634653002301655653001801678653001601696653001701712653002301729100002901752700002601781700002601807700002601833856012201859 2023 eng d00aPermeable polymersomes from temperature and pH dual stimuli-responsive PVCL-b-PLL block copolymers for enhanced cell internalization and lysosome targeting0 aPermeable polymersomes from temperature and pH dual stimulirespo cAUG a2134540 v1513 a

A series of dual stimuli-responsive block copolymers comprising temperature-responsive poly(N-vinyl-caprolactam) (PVCL) and biodegradable pH-responsive poly(L-lysine) (PLL) of varying chain length were syn-thesized by a combination of free radical polymerization and ring opening polymerization. The block copolymers formed micelles and vesicles (polymersomes) in response to temperature and pH, respectively, in aqueous so-lution. The nanoassemblies were characterized by transmission electron microscopy and dynamic light scattering techniques. Encapsulation of both hydrophobic and hydrophilic dyes in the polymersomes was shown. Doxo-rubicin (DOX) was loaded in the polymersomes and its controlled release in response to the two stimuli, inde-pendently and jointly, was studied. The drug was found to be released due to stimuli-induced increased permeability without disassembly of the polymersomes. A significant increase in the cellular uptake of the drug-loaded polymersomes at hyperthermia conditions was demonstrated at 41 degrees C and release of the drug upon localization in lysosomes was observed. Cellular internalization pathway of the polymersomes was investigated by competitive inhibition assay and a combination of endocytic pathways dominated by caveolae-mediated mechanism was found to be operative.

10ablock copolymers10aControlled release10adrug delivery10aendocytosis10aPolymersomes10aStimuli-responsive1 aSurapaneni, Sai, Geetika1 aChoudhari, Shakeb, N.1 aAvhad, Shankarrao, V.1 aAmbade, Ashootosh, V. uhttps://library.ncl.res.in/content/permeable-polymersomes-temperature-and-ph-dual-stimuli-responsive-pvcl-b-pll-block