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Total 42 results found since Jan 2013.

Interleukin-4 receptor-targeted delivery of Bcl-xL siRNA sensitizes tumors to chemotherapy and inhibits tumor growth.
In this study, we exploited IL-4R-targeted delivery of Bcl-xL siRNA to IL-4R-expressing tumor cells in order to sensitize them to chemotherapy. To target IL-4R, an IL-4R-binding peptide, IL4RPep-1, was attached to branched polyethyleneimine-superparamagnetic iron oxide nanoparticles (BPEI-SPION). These nanoparticles were then complexed with Bcl-xL-targeting siRNA. IL-4R-targeted BPEI-SPION/Bcl-xL siRNA more efficiently reduced Bcl-xL gene expression and enhanced cytotoxicity of doxorubicin in MDA-MB231 breast tumor cells compared to untargeted BPEI-SPION/Bcl-xL siRNA. The siRNA was released from the complexes after 15 h o...
Source: Biomaterials - July 15, 2017 Category: Materials Science Authors: Guruprasath P, Kim J, Gunassekaran GR, Chi L, Kim S, Park RW, Kim SH, Baek MC, Bae SM, Kim SY, Kim DK, Park IK, Kim WJ, Lee B Tags: Biomaterials Source Type: research

Superparamagnetic iron oxide nanoparticles mediated 131I-hVEGF siRNA inhibits hepatocellular carcinoma tumor growth in nude mice
Conclusions: EMF-guided 131I-hVEGF siRNA/SilenceMag exhibited an antitumor effect. The synergic therapy of 131I-hVEGF siRNA/SilenceMag might be a promising future treatment option against HCC with the dual functional properties of tumor therapy and imaging.
Source: BMC Cancer - February 21, 2014 Category: Cancer & Oncology Authors: Jing ChenShu ZhuLiangqian TongJiansha LiFei ChenYunfeng HanMing ZhaoWei Xiong Source Type: research

Pmp22 mutant allele-specific siRNA alleviates demyelinating neuropathic phenotype in vivo.
In this study, we investigated whether regulation of a mutant allele by an allele-specific small interfering RNA (siRNA) can alleviate the demyelinating neuropathic phenotype of CMT. We designed 19 different allele-specific siRNAs for Trembler J (Tr-J) mice harboring a naturally occurring mutation (Leu16Pro) in Pmp22. Using a luciferase assay, we identified an siRNA that specifically and selectively reduced the expression level of the mutant allele and reversed the low viability of Schwann cells caused by mutant Pmp22 over-expression in vitro. The in vivo efficacy of the allele-specific siRNA was assessed by its intraperit...
Source: Neurobiology of Disease - January 16, 2017 Category: Neurology Authors: Lee JS, Chang EH, Koo OJ, Jwa DH, Mo WM, Kwak G, Moon HW, Park HT, Hong YB, Choi BO Tags: Neurobiol Dis Source Type: research

Stealth magnetic nanocarriers of siRNA as platform for breast cancer theranostics
Publication date: 5 November 2017 Source:International Journal of Pharmaceutics, Volume 532, Issue 2 Author(s): J. Bruniaux, S. Ben Djemaa, K. Hervé-Aubert, H. Marchais, I. Chourpa, S. David The endogenous mechanism of RNA interference is more and more used in research to obtain specific down-regulation of gene expression in diseases such as breast cancer. Currently, despite the new fields of study open up by RNA interference, the rapid degradation of siRNA by nucleases and their negative charges prevent them from crossing cell membranes. To overcome these limitations, superparamagnetic iron oxide nanoparticles (SPIONs) ...
Source: International Journal of Pharmaceutics - October 11, 2017 Category: Drugs & Pharmacology Source Type: research

MnAl-Layered Double Hydroxide Nanoparticles as a Dual-functional Platform for Magnetic Resonance Imaging and siRNA Delivery.
Abstract Multifunctional nanoparticles for cancer theranosis have been widely explored for effective cancer detection and therapy. In this research, dually functionalised manganese-based layered double hydroxide nanoparticles (Mn-LDHs) have been examined as an effective anticancer drug/gene delivery system and T1-weighted magnetic resonance imaging (MRI) modality for brain cancer theranostics. Such Mn-LDHs have been shown to accommodate dsDNA/siRNAs and efficiently deliver to Neuro-2a cells (N2a). Mn-LDHs have also shown high biocompatibility with low cytotoxicity. Importantly, the cell death-siRNA (CD-siRNA) deli...
Source: Chemistry - August 1, 2017 Category: Chemistry Authors: Zuo H, Chen W, Li B, Xu K, Cooper H, Gu Z, Xu ZP Tags: Chemistry Source Type: research

MRI-Visible Nanovehicle for Efficient siRNA Delivery
Methods Mol Biol. 2021;2282:195-208. doi: 10.1007/978-1-0716-1298-9_13.ABSTRACTVisualizing siRNA delivery through medical imaging methods has drawn much attentions in recent gene therapy studies. Among them, iron oxide-based magnetic resonance imaging (MRI) is regarded as one of the most promising imaging modalities for its high spatial resolution as well as deep penetration and real-time properties. In this chapter, a detailed protocol of an amphiphilic superparamagnetic iron oxide (SPIO) nanovehicle-based siRNA delivery is described, mainly focusing on SPIO/siRNA complexes formation and characterization, in vitro and in ...
Source: Mol Biol Cell - April 30, 2021 Category: Molecular Biology Authors: Rongrong Jin Wencheng Zhu Gan Lin Gang Liu Hua Ai Source Type: research

Modelling the response surface to predict the hydrodynamic diameters of theranostic magnetic siRNA nanovectors
Publication date: 15 January 2015 Source:International Journal of Pharmaceutics, Volume 478, Issue 1 Author(s): Stephanie David , Hervé Marchais , Didier Bedin , Igor Chourpa Short interfering RNAs (siRNAs) appear to be a promising tool to treat various human diseases, such as cancer via the RNA interference (RNAi) mechanism. Since the systemic administration of siRNAs is limited by their capacity to attain the site of action, novel delivery systems are needed. Previously, we reported the formulation of magnetic siRNA nanovectors (MSN) using electrostatic assembly of the following components: (1) functionalized superpar...
Source: International Journal of Pharmaceutics - December 7, 2014 Category: Drugs & Pharmacology Source Type: research

Nanotherapy Silencing the Interleukin-8 Gene Produces Regression of Prostate Cancer by Inhibition of Angiogenesis.
This study examines the role of IL-8 in the pathogenesis of metastatic prostate cancer. We developed a biocompatible, cationic polylactide (CPLA) nanocarrier to complex with and efficiently deliver IL-8 siRNA to CaP cells in vitro and in vivo. CPLA IL-8 siRNA nanocomplexes (nanoplexes) protect siRNA from rapid degradation, are nontoxic, have a prolonged lifetime in circulation, and their net positive charge facilitates penetration of cell membranes and subsequent intracellular trafficking. Administration of CPLA IL-8 siRNA nanoplexes to immunodeficient mice bearing human CaP tumors produced significant antitumor activities...
Source: Immunology - May 8, 2016 Category: Allergy & Immunology Authors: Aalinkeel R, Nair B, Chen CK, Mahajan SD, Reynolds JL, Zhang H, Sun H, Sykes DE, Chadha KC, Turowski SG, Bothwell KD, Seshadri M, Chen C, Schwartz SA Tags: Immunology Source Type: research

Superparamagnetic iron oxide nanoparticles target BxPC-3 cells and silence MUC4 for theranostics of pancreatic cancer
CONCLUSION: PEI-SPION-siRNA may be beneficial as a novel theranostic tool for PC.PMID:37236323 | DOI:10.1016/j.bbagen.2023.130383
Source: Biochimica et Biophysica Acta - May 26, 2023 Category: Biochemistry Authors: Yu Pu Helin Ke Changqiang Wu Shaodan Xu Yang Xiao Lina Han Guorong Lyv Shilin Li Source Type: research

Combination Treatment with Theranostic Nanoparticles for Glioblastoma Sensitization to TMZ
Conclusions While our results demonstrate that siRNA delivery by targeted nanoparticles resulted in modulating tumor response to chemotherapy in GBM, they also point to a significant contribution of CTX to tumor cell death.
Source: Molecular Imaging and Biology - September 26, 2014 Category: Molecular Biology Source Type: research

Silencing of CCR2 in myocarditis
Conclusion This study highlights the importance of CCR2 in the pathogenesis of myocarditis. In addition, we show that siCCR2 affects leucocyte progenitor trafficking. The data also point to a novel therapeutic strategy for the treatment of myocarditis.
Source: European Heart Journal - June 14, 2015 Category: Cardiology Authors: Leuschner, F., Courties, G., Dutta, P., Mortensen, L. J., Gorbatov, R., Sena, B., Novobrantseva, T. I., Borodovsky, A., Fitzgerald, K., Koteliansky, V., Iwamoto, Y., Bohlender, M., Meyer, S., Lasitschka, F., Meder, B., Katus, H. A., Lin, C., Libby, P., Sw Tags: BASIC SCIENCE Source Type: research

Caspase 3 Silencing Inhibits Biomechanical Overload-Induced Intervertebral Disk Degeneration.
Abstract Intervertebral disk (IVD) degeneration causes debilitating low back pain in much of the worldwide population. No efficient treatment exists because of an unclear pathogenesis. One characteristic event early in such degeneration is the apoptosis of nucleus pulposus (NP) cells embedded in IVDs. Excessive biomechanical loading may also be a major etiology of IVD degeneration. The present study used in vitro and in vivo models of compressive loading to elucidate the underlying mechanism of IVD degeneration. In addition, we investigated whether the inhibition of apoptosis is a potential clinical therapeutic ...
Source: The American Journal of Pathology - January 2, 2014 Category: Pathology Authors: Yamada K, Sudo H, Iwasaki K, Sasaki N, Higashi H, Kameda Y, Ito M, Takahata M, Abumi K, Minami A, Iwasaki N Tags: Am J Pathol Source Type: research

Aquaporin‐4 knockdown ameliorates hypoxic‐ischemic cerebral edema in newborn piglets
This study aimed to understand the physiological role of AQP4 in hypoxia–ischemia‐mediated cytotoxic brain edema. We specifically knocked down AQP4 expression by intracerebral injection of a plasmid containing AQP4 siRNA into a neonatal piglet model. The success of the hypoxia–ischemia‐induced piglet model was confirmed by conventional magnetic resonance imaging and diffusion‐weighted imaging. AQP4 knockdown led to reduced brain edema accompanied by a higher apparent diffusion coefficient value, compared to the control group injected with a plasmid containing scrambled siRNA. Real‐time polymerase chain reaction...
Source: IUBMB Life - January 1, 2015 Category: Research Authors: Chao Yang, Zhengjuan Liu, Hongjie Li, Fangbing Zhai, Jing Liu, Jie Bian Tags: Research Communication Source Type: research

RCC2 Expression Stimulates ER-Positive Breast Tumorigenesis.
Conclusions: Our results suggest that estrogen-induced RCC2 expression prompts IGF1, TWIST1, and IL-6 expression, stimulates cell migration, and inhibits apoptosis to contribute to ER + breast tumorigenesis. PMID: 32565805 [PubMed]
Source: Journal of Oncology - June 24, 2020 Category: Cancer & Oncology Tags: J Oncol Source Type: research