The development of drug delivery systems with high drug-loading efficiency, kinetic stability against dilution, as well as enhanced anticancer activity is of crucial importance to the fields of self-assembly and nanom...The development of drug delivery systems with high drug-loading efficiency, kinetic stability against dilution, as well as enhanced anticancer activity is of crucial importance to the fields of self-assembly and nanomedicine. Herein, we propose a strategy where the anticancer peptide acts as water-soluble monomer to directly participate in emulsion interfacial polymerization for fabricating polypeptide nanospheres. The constructed polypeptide nanospheres hold a high drug loading efficiency of 77%, and can be stably dispersed in highly diluted aqueous solutions. The acid-labile amide linkage in polypeptide nanospheres can be hydrolyzed in tumor acidic environments, thus releasing anticancer peptides selectively. The polypeptide nanospheres achieve significantly enhanced anticancer activity against HCT116 cells in vitro and in vivo through improved mitochondrial and membrane disruption. In addition, its side effects on normal cells can be reduced significantly. It is highly anticipated that more kinds of anticancer drug candidates or anticancer drugs can be applied to fabricate polymeric nanomedicines with improved anticancer activity through this strategy.展开更多
An Escherichia coli reduction-powered supramolecular polymerization is reported,leading to the fabrication of a near-infrared(NIR)photothermal antibacterial agent in situ.To this end,a bifunctional monomer containing ...An Escherichia coli reduction-powered supramolecular polymerization is reported,leading to the fabrication of a near-infrared(NIR)photothermal antibacterial agent in situ.To this end,a bifunctional monomer containing two viologen moieties was designed.WhenincubatingE.coli with thebifunctional monomer and cucurbit[8]uril,viologen moieties were reduced to viologen cation radicals by E.coli,and a supramolecular polymer with supramolecular dimers of viologen cation radicals integrated into the main chain was fabricated on the surface of E.coli.展开更多
A new method of light-powered dissipative supra-molecular polymerization is established,in which supramolecular polymerization is implemented in the far-from-equilibrium state.A bifunctional mono-mer containing two vi...A new method of light-powered dissipative supra-molecular polymerization is established,in which supramolecular polymerization is implemented in the far-from-equilibrium state.A bifunctional mono-mer containing two viologen moieties was designed.Upon inputting energy by light,the sys-tem was driven far from equilibrium,and the mono-mers were photoreduced and activated to form supramolecular polymers driven by 2∶1 host–guest complexation of the viologen cation radical and cucurbit[8]uril.As the system returned to equilibri-um,the supramolecular polymers depolymerized spontaneously by air oxidation.This method works in both linear and in cross-linked supramolecular polymerization.The strategy of light-powered dis-sipative supramolecular polymerization is anticipat-ed to have potential in the fabrication of functional supramolecular materials,especially in creating novel“living”materials.展开更多
基金financially supported by the Ministry of Science and Technology of China(2021YFA1501600,2018YFA0208900)the National Natural Science Foundation of China(21821001)the Strategic Priority Research Program of Chinese Academy of Sciences(XDB36000000)。
文摘The development of drug delivery systems with high drug-loading efficiency, kinetic stability against dilution, as well as enhanced anticancer activity is of crucial importance to the fields of self-assembly and nanomedicine. Herein, we propose a strategy where the anticancer peptide acts as water-soluble monomer to directly participate in emulsion interfacial polymerization for fabricating polypeptide nanospheres. The constructed polypeptide nanospheres hold a high drug loading efficiency of 77%, and can be stably dispersed in highly diluted aqueous solutions. The acid-labile amide linkage in polypeptide nanospheres can be hydrolyzed in tumor acidic environments, thus releasing anticancer peptides selectively. The polypeptide nanospheres achieve significantly enhanced anticancer activity against HCT116 cells in vitro and in vivo through improved mitochondrial and membrane disruption. In addition, its side effects on normal cells can be reduced significantly. It is highly anticipated that more kinds of anticancer drug candidates or anticancer drugs can be applied to fabricate polymeric nanomedicines with improved anticancer activity through this strategy.
基金supported by the National Natural Science Foundation of China(nos.21890730,21890731,21821001,and 22071132).P.Z.was supported by the National Natural Science Foundation of China(nos.21771103 and 21977047)the Natural Science Foundation of Jiangsu Province(nos.BK20200058 and BK20202004)Fundamental Research Funds for the Central Universities(grant no.14380205).
文摘An Escherichia coli reduction-powered supramolecular polymerization is reported,leading to the fabrication of a near-infrared(NIR)photothermal antibacterial agent in situ.To this end,a bifunctional monomer containing two viologen moieties was designed.WhenincubatingE.coli with thebifunctional monomer and cucurbit[8]uril,viologen moieties were reduced to viologen cation radicals by E.coli,and a supramolecular polymer with supramolecular dimers of viologen cation radicals integrated into the main chain was fabricated on the surface of E.coli.
基金This work is supported financially by the National Natural Science Foundation of China(21434004,21890731,21821001,and 91527000)P.Z.is supported by the Na-tional Natural Science Foundation of China(21771103)the Natural Science Foundation of Jiangsu Province(BK20160639)。
文摘A new method of light-powered dissipative supra-molecular polymerization is established,in which supramolecular polymerization is implemented in the far-from-equilibrium state.A bifunctional mono-mer containing two viologen moieties was designed.Upon inputting energy by light,the sys-tem was driven far from equilibrium,and the mono-mers were photoreduced and activated to form supramolecular polymers driven by 2∶1 host–guest complexation of the viologen cation radical and cucurbit[8]uril.As the system returned to equilibri-um,the supramolecular polymers depolymerized spontaneously by air oxidation.This method works in both linear and in cross-linked supramolecular polymerization.The strategy of light-powered dis-sipative supramolecular polymerization is anticipat-ed to have potential in the fabrication of functional supramolecular materials,especially in creating novel“living”materials.
