Triple stimuli-responsive supramolecular nanoassembly with mitochondrial targetability for chemophotothermal therapy
摘要:
Mitochondria play crucial roles in a variety of cellular physiological processes, mitochondria-accumulating drug delivery has drawn pronounced attention in the field of cancer theranostics. Camptothecin (CPT) is a DNA Topoisomerase I inhibitor and exerts a broad-spectrum anticancer profile. Berberine (BBR) is able to perferably enter into cancer cell mitochondria and trigger the cell apoptosis. In this work, CPT and BBR were combined together (CPT-ss-BBR) through GSH-responsible disulfide bond, and then co-assembled with photosensitizer indocyanine green (ICG) into nanodrugs (CPT-ss-BBR/ICG NPs), which was driven through hydrophobic, pi-pi stacking and especially, electrostatic interactions of anions and cations as found by molecular dynamics simulations and quantum chemistry calculations. Our developed nanodrugs displayed an average size of similar to 168 nm and showed exceptional instability by irradiation presence, acid condition and high concentration of GSH, thereby eliciting the rapid disassembly and accelerating drug release. The better therapy effect of CPT-ss-BBR/ICG NPs on A549 cells might be attributed to triply stimuli-responsive rapid disassembly, preferable accumulation into mitochondria and combined chemotherapy and photothermal therapy, all of which directly rendered the notable loss of mitochondria membrane potential, high level of reactive oxygen species in cancer cells, accelerated the apoptosis of cancer cells and repressed the growth of tumors.
Smart nanoparticles with a detachable outer shell for maximized synergistic antitumor efficacy of therapeutics with varying physicochemical properties
作者:Tingjie Yin、Jiyong Liu、Zekai Zhao、Lihui Dong、Han Cai、Lifang Yin、Jianping Zhou、Meirong Huo
DOI:10.1016/j.jconrel.2016.09.036
日期:2016.12
hydrophilic siRNA with adjustable ratios. Selectivedelivery to CD44 overexpressing tumors was achieved through passive and active targeting, followed by HAase-triggered HA de-shielding and GSH-triggered burst release of both cargos. Rapid intracellular trafficking maximized synergistic cytotoxicities of chemotherapeutics and siRNA for remarkable tumorinhibition in a xenograft animal tumor model. Consequently
To note, DHA prodrugs were prepared as self-assemblednanoparticles (C14-SS-DHA NPs and C14-CC-DHA NPs). The size and zeta potential of C14-SS-DHA NPs were 121 ± 1.582 nm and −29 ± 0.635 mV, and those of C14-CC-DHA NPs were 137.5 ± 0.5132 nm and −41 ± 0.377 mV, respectively. The C14-SS-DHA NPs can release DHA in a reductive media in vitro. The pharmacokinetics study showed that the area under the curve
Symmetrical disulfides (2a-m, 9, 13) were synthesized by oxidation or by a new reaction using ethyl α-bromomalonate from the corresponding thiazolidinecarboxylic acids containing a sulfhydryl group (1a-m, 8, 12). Mixed disulfides (14a-g) were synthesized by reaction of thiols (1a, c) with Bunte salt. Stereoselective acylation of the thiazolidinecarboxylic acid 5a gave the symmetrical disulfide 2c or the dicarboxylic acid 15, depending on the conditions. The absolute configurations of these disulfides were decided to be (2R, 2'R, 4R, 4'R) by comparison of nuclear magnetic resonance spectra and specific rotation with those of the (2S, 2'S, 4R, 4'R)-disulfide (4). The disulfides were tested for aldose reductase inhibitory activity in vitro. The symmetrical disulfide 2j and dicarboxylic acid 15 showed remarkably high potency.