Filtered By:
Source: Biomaterials
Cancer: Cancer

This page shows you your search results in order of relevance.

Order by Relevance | Date

Total 77 results found since Jan 2013.

SiRNA-phospholipid conjugates for gene and drug delivery in cancer treatment.
In this study, the thiol-modified sense and antisense siRNA are chemically conjugated with phospholipids to form sense and antisense siRNA-phospholipid, and then these sense or antisense siRNA-phospholipids with equal amounts are annealed to generate siRNA-phospholipids. The siRNA-phospholipids can serve dual functions as agents that can silence gene expression and as a component of nanoparticles to embed hydrophobic anticancer drugs to cure tumor. siRNA-phospholipids together with cationic lipids and DSPE-PEG2000 fuse around PLGA to form siRNA-phospholipids enveloped nanoparticles (siRNA-PCNPs), which can deliver siRNAs a...
Source: Biomaterials - May 2, 2014 Category: Materials Science Authors: Liu H, Li Y, Mozhi A, Zhang L, Liu Y, Xu X, Xing J, Liang X, Ma G, Yang J, Zhang X Tags: Biomaterials Source Type: research

Direct cytosolic siRNA delivery by reconstituted high density lipoprotein for target-specific therapy of tumor angiogenesis.
We described here the mechanisms by which small interfering RNA (siRNA) molecules incorporated in reconstituted high density lipoprotein (rHDL) were efficiently transferred into the cytoplasm of cells to perform target-specific therapy of tumor angiogenesis. Using fluorescent-tagged apolipoprotein A-I (apoA-I) and cholesterol-conjugated siRNA (Chol-siRNA), it was confirmed with FACS and confocal microscopic measurements that Chol-siRNA-loaded rHDL nanoparticles (rHDL/Chol-siRNA complexes) were successfully established and apoA-I certainly was attached to the surface of Chol-siRNA-loaded lipoplexes (Lipos/Chol-siRNA complex...
Source: Biomaterials - May 27, 2014 Category: Materials Science Authors: Ding Y, Wang Y, Zhou J, Gu X, Wang W, Liu C, Bao X, Wang C, Li Y, Zhang Q Tags: Biomaterials Source Type: research

Self-crosslinked human serum albumin nanocarriers for systemic delivery of polymerized siRNA to tumors.
In this study, we utilized human serum albumin (HSA), which is the most abundant of the plasma proteins, as a siRNA carrier for systemic tumor-targeted siRNA delivery. Both HSA and siRNA molecules were thiol-introduced to improve the binding affinity for each other. The resulting thiolated HSA (tHSA) and polymerized siRNA (psi) formed stable nanosized complexes (psi-tHSAs) by chemical crosslinking and self-crosslinking. After internalization, the psi-tHSAs showed target gene silencing activity in vitro comparable to conventional Lipofectamine™-siRNA complexes, without remarkable cytotoxicity. After intravenous injection...
Source: Biomaterials - September 16, 2013 Category: Materials Science Authors: Son S, Song S, Lee SJ, Min S, Kim SA, Yhee JY, Huh MS, Chan Kwon I, Jeong SY, Byun Y, Kim SH, Kim K Tags: Biomaterials Source Type: research

Actively-targeted polyion complex micelles stabilized by cholesterol and disulfide cross-linking for systemic delivery of siRNA to solid tumors.
Abstract For small interfering RNA (siRNA)-based cancer therapies, we report an actively-targeted and stabilized polyion complex micelle designed to improve tumor accumulation and cancer cell uptake of siRNA following systemic administration. Improvement in micelle stability was achieved using two stabilization mechanisms; covalent disulfide cross-linking and non-covalent hydrophobic interactions. The polymer component was designed to provide disulfide cross-linking and cancer cell-targeting cyclic RGD peptide ligands, while cholesterol-modified siRNA (Chol-siRNA) provided additional hydrophobic stabilization to t...
Source: Biomaterials - June 12, 2014 Category: Materials Science Authors: Oe Y, Christie RJ, Naito M, Low SA, Fukushima S, Toh K, Miura Y, Matsumoto Y, Nishiyama N, Miyata K, Kataoka K Tags: Biomaterials Source Type: research

Restoration of chemosensitivity by multifunctional micelles mediated by P-gp siRNA to reverse MDR.
Abstract One of the main obstacles in tumor therapy is multiple drug resistance (MDR) and an underlying mechanism of MDR is up-regulation of the transmembrane ATP-binding cassette (ABC) transporter proteins, especially P-glycoprotein (P-gp). In the synergistic treatment of siRNA and anti-cancer drug doxorubicin, it is crucial that both the siRNA and doxorubicin are simultaneously delivered to the tumor cells and the siRNA can fleetly down-regulate P-g before doxorubicin inactivates the P-gp and is pumped out. Herein, a type of micelles comprising a polycationic PEI-CyD shell to condense the siRNA and hydrophobic c...
Source: Biomaterials - July 4, 2014 Category: Materials Science Authors: Shen J, Wang Q, Hu Q, Li Y, Tang G, Chu PK Tags: Biomaterials Source Type: research

Tumor-penetrating codelivery of siRNA and paclitaxel with ultrasound-responsive nanobubbles hetero-assembled from polymeric micelles and liposomes.
Abstract Drug resistance is a big problem in systemic chemotherapy of hepatocellular carcinoma (HCC), and nanomedicines loaded with both chemotherapeutic agents (e.g. paclitaxel, PTX) and siRNA's targeting antiapoptosis genes (e.g. BCL-2) possess the advantages to simultaneously overcome the efflux pump-mediated drug resistance and antiapoptosis-related drug resistance. However, tumor-penetrating drug delivery with this type of nanomedicines is extremely difficult due to their relatively big size compared to the single drug-loaded nanomedicines. Aiming at address this problem, US-responsive nanobubbles encapsulati...
Source: Biomaterials - April 17, 2014 Category: Materials Science Authors: Yin T, Wang P, Li J, Wang Y, Zheng B, Zheng R, Cheng D, Shuai X Tags: Biomaterials Source Type: research

Matrix metalloproteinase 2-responsive micelle for siRNA delivery.
Abstract Systemic delivery of small interfering RNA (siRNA) into cancer cells remains the major obstacle to siRNA drug development. An ideal siRNA delivery vehicle for systemic administration should have long circulation time in blood, accumulate at tumor site, and sufficiently internalize into cancer cells for high-efficiency of gene silence. Herein, we report a core-shell Micelleplex delivery system that made from block copolymer bearing poly(ethylene glycol) (PEG), matrix metalloproteinase 2 (MMP-2)-degradable peptide PLG*LAG, cationic cell penetrating peptide polyarginine r9 and poly(ε-caprolactone) (PCL) for...
Source: Biomaterials - June 11, 2014 Category: Materials Science Authors: Wang HX, Yang XZ, Sun CY, Mao CQ, Zhu YH, Wang J Tags: Biomaterials Source Type: research

PEGylated carboxymethyl chitosan/calcium phosphate hybrid anionic nanoparticles mediated hTERT siRNA delivery for anticancer therapy.
In this study, we synthesized a pH-sensitive polymer of PEG grafted carboxymethyl chitosan (PEG-CMCS) and developed anionic-charged hybrid nanoparticles of PEG-CMCS and calcium phosphate (CaP) for siRNA delivery through a single-step self-assembly method in aqueous condition. The formed nanoparticles with charge of around -8.25 mv and average diameter of 102.1 nm exhibited efficient siRNA encapsulation and enhanced colloidal and serum stability. The test in vitro indicated that the nanoparticles entered into HepG2 cells by endocytosis, and achieved endosomal escape of siRNA effectively due to the pH-responsive disassem...
Source: Biomaterials - June 14, 2014 Category: Materials Science Authors: Xie Y, Qiao H, Su Z, Chen M, Ping Q, Sun M Tags: Biomaterials Source Type: research

Nanovaccine loaded with poly I:C and STAT3 siRNA robustly elicits anti-tumor immune responses through modulating tumor-associated dendritic cells in vivo.
Abstract Although cancer vaccine-based immunotherapy holds great potential for cancer treatment, tumor-induced dendritic cell (DC) dysfunction remains to be the major obstacle for developing effective vaccines. Compared with normal DCs, tumor-associated DCs (TADCs) are less matured with poor responsiveness to Toll-like receptor (TLR) stimulation, which has been related with STAT3 hyperactivity. In the present study, Poly I:C (PIC, a TLR3 agonist), STAT3 siRNA and OVA antigen were co-encapsulated by poly (ethylene glycol)-b-poly (l-lysine)-b-poly (l-leucine) (PEG-PLL-PLLeu) polypeptide micelles to generate PMP/OVA/...
Source: Biomaterials - December 6, 2014 Category: Materials Science Authors: Luo Z, Wang C, Yi H, Li P, Pan H, Liu L, Cai L, Ma Y Tags: Biomaterials Source Type: research

Aerosol delivery of star polymer-siRNA nanoparticles as a therapeutic strategy to inhibit lung tumor growth
Biomaterials. 2022 Apr 23;285:121539. doi: 10.1016/j.biomaterials.2022.121539. Online ahead of print.ABSTRACTLung cancer is a major contributor to cancer-related death worldwide. siRNA nanomedicines are powerful tools for cancer therapeutics. However, there are challenges to overcome to increase siRNA delivery to solid tumors, including penetration of nanoparticles into a complex microenvironment following systemic delivery while avoiding rapid clearance by the reticuloendothelial system, and limited siRNA release from endosomes once inside the cell. Here we characterized cell uptake, intracellular trafficking, and gene si...
Source: Biomaterials - May 2, 2022 Category: Materials Science Authors: Z Ma S W Wong H Forgham L Esser M Lai M N Leiske K Kempe G Sharbeen J Youkhana F Mansfeld J F Quinn P A Phillips T P Davis M Kavallaris J A McCarroll Source Type: research

Protein-resistant, reductively dissociable polyplexes for in vivo systemic delivery and tumor-targeting of siRNA.
Abstract Small interfering RNA (siRNA) has been considered as a very attractive therapeutic alternative to chemical drugs; however, the chemical and biological instability and poor delivery efficiency of siRNA limit its success in clinical applications. Here we report a protein-resistant, reductively dissociable siRNA delivery system based on self-assembled polyelectrolyte complexes of dextran-siRNA conjugates linked by disulfide bonds. The prepared polyplexes exhibit excellent dispersion stability in the presence of serum because of the anti-fouling property of dextran exposed onto the complex surface. The enzyma...
Source: Biomaterials - January 30, 2013 Category: Materials Science Authors: Kim JS, Oh MH, Park JY, Park TG, Nam YS Tags: Biomaterials Source Type: research

siRNA delivered by EGFR-specific scFv sensitizes EGFR-TKI-resistant human lung cancer cells.
In this study, we developed an EGFR-scFv-arginine nonamer peptide fusion protein, s-9R, as an siRNA carrier. Here, we show that s-9R effectively and specifically delivers EGFR-siRNAs, KRAS-siRNA and MET-siRNA into NSCLC cells and silences the expression of target genes. The sensitivity of NSCLC cells to gefitinib was restored after treatment with the s-9R/siRNA complex, and the apoptosis rates of the treated cells were significantly higher than those of the control groups. Furthermore, the co-administration of s-9R/siRNA and gefitinib successfully suppressed the progression of H1975 xenograft tumors and extended the life s...
Source: Biomaterials - October 23, 2015 Category: Materials Science Authors: Lu Y, Liu L, Wang Y, Li F, Zhang J, Ye M, Zhao H, Zhang X, Zhang M, Zhao J, Yan B, Yang A, Feng H, Zhang R, Ren X Tags: Biomaterials Source Type: research

Gold-nanorods-siRNA nanoplex for improved photothermal therapy by gene silencing.
Abstract Nanomaterials-mediated photothermal therapy (PTT) often suffers from the fundamental cellular defense mechanism of heat shock response which leads to therapeutic resistance of cancer cells and reduces the therapeutic efficacy. Herein, a gold nanorods (GNRs)-siRNA platform with gene silencing capability is produced to improve the PTT efficiency. After surface modification, the GNRs show the ability to deliver siRNA oligos targeting BAG3 which is an efficient gene to block the heat-shock response. The synthesized GNRs-siRNA nanoplex exhibits excellent ability in the delivery of siRNA into cancer cells with ...
Source: Biomaterials - November 19, 2015 Category: Materials Science Authors: Wang BK, Yu XF, Wang JH, Li ZB, Li PH, Wang H, Song L, Chu PK, Li C Tags: Biomaterials Source Type: research

Ultrasound assisted gene and photodynamic synergistic therapy with multifunctional FOXA1-siRNA loaded porphyrin microbubbles for enhancing therapeutic efficacy for breast cancer.
Abstract To improve the non-invasive therapeutic efficacy for ER positive breast cancer (ER+ BC), we fabricated a multifunctional FOXA1 loaded porphyrin microbubble to combine photodynamic therapy (PDT) and gene therapy of FOXA1 knockdown (KD) with ultrasound targeted microbubble destruction (UTMD) technology under the guidance of contrast enhanced ultrasound (CEUS). Cationic porphyrin microbubbles (CpMBs) were firstly fabricated from a porphyrin grafted lipid with two cationic amino groups (PGL-NH2) and fluorocarbon inert gas of C3F8. Porphyrin group in the CpMBs monolayer could be used as a photosensitizer for ...
Source: Biomaterials - May 3, 2018 Category: Materials Science Authors: Zhao R, Liang X, Zhao B, Chen M, Liu R, Sun S, Yue X, Wang S Tags: Biomaterials Source Type: research