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Total 2013 results found since Jan 2013.

Development of a carrier system containing hyaluronic acid and protamine for siRNA delivery in the treatment of melanoma
SummaryThe use of small interfering RNA (siRNA) in melanoma treatment remains limited owing to its biological properties. Herein, we developed a carrier system containing hyaluronic acid and protamine for siRNA delivery. Considering zeta potential and particle size as standards, the ratio of each component in liposome nanoparticles prepared was screened using the control variable method, and siRNA cationic liposome nanoparticles were prepared based on the optimal results obtained. The encapsulation rate of the cationic liposome nanoparticles was measured, and particle morphology was observed. B16F10 cells were treated with...
Source: Investigational New Drugs - August 12, 2020 Category: Drugs & Pharmacology Source Type: research

Gene silencing with siRNA targeting E6/E7 as a therapeutic intervention against head and neck cancer-containing HPV16 cell lines.
Conclusion: Our results indicate that siRNA E6 and/or E7 may have potential as a gene-specific therapy for human papillomavirus (HPV) type 16 (HPV16)-related squamous cell carcinoma of the head and neck (HNSCC). Objectives: To evaluate the effectiveness of siRNA targeting E6 and/or E7 on the in vitro and in vivo growth suppression of HPV16-related HNSCC. Methods: HPV16-related HNSCC (UM-SCC47) cell lines were used for the present study. Expression of HPV viral oncogenes E6 and/or E7 and their cellular targets, p53 and pRb, was evaluated by real-time PCR, Western blotting, and immunofluorescence staining. To study the effec...
Source: Acta Oto-Laryngologica - May 3, 2013 Category: ENT & OMF Authors: Adhim Z, Otsuki N, Kitamoto J, Morishita N, Kawabata M, Shirakawa T, Nibu KI Tags: Acta Otolaryngol Source Type: research

Current non-viral siRNA delivery systems as a promissing treatment of skin diseases.
CONCLUSION: The treatment of skin diseases based on topical delivery of siRNA, which act by inhibiting the expression of target transcripts, offers many potential therapeutic advantages for suppressing genes into the skin. PMID: 30084329 [PubMed - as supplied by publisher]
Source: Current Pharmaceutical Design - August 7, 2018 Category: Drugs & Pharmacology Authors: Rosa J, Suzuki I, Kravicz M, Caron A, Pupo AV, Praca FG, Bentley MVLB Tags: Curr Pharm Des Source Type: research

Homologous-targeting biomimetic nanoparticles for photothermal therapy and Nrf2-siRNA amplified photodynamic therapy against oral tongue squamous cell carcinoma
Publication date: 15 May 2020Source: Chemical Engineering Journal, Volume 388Author(s): Shurui Shi, Yue Wang, Beibei Wang, Qian Chen, Guoyun Wan, Xiaoying Yang, Juan Zhang, Lianyun Zhang, Changyi Li, Yinsong WangAbstractPhotothermal therapy (PTT) and photodynamic therapy (PDT) have some advantages such as site selectivity, non- or little-invasive property and negligible drug resistance for treatment of oral tongue squamous cell carcinoma (OTSCC). However, the activation of intracellular antioxidant responses will partly counteract anticancer effects of PDT. As a well-known redox-regulated transcription factor, Nrf2 has bee...
Source: Chemical Engineering Journal - February 5, 2020 Category: Chemistry Source Type: research

A Theoretical Study on Inhibition of Melanoma with Controlled and Targeted Delivery of siRNA via Skin Using SPACE-EGF.
Abstract Melanoma is a potentially lethal skin cancer with high mortality rate. Recently, the peptide-mediated transdermal delivery of small interference RNA (siRNA) emerges as a promising strategy to treat melanoma by inducing the apoptosis of tumor cells, but the related theoretical model describing the delivery of siRNA under the effect of SPACE-EGF, the growth inhibition of melanoma and the dynamic expanding of the bump on the skin due to the growth of melanoma has not been reported yet. In this article, a theoretical model is developed to describe the percutaneous siRNA delivery mediated by SPACE-EGF to melan...
Source: Annals of Biomedical Engineering - March 27, 2017 Category: Biomedical Engineering Authors: Liu J, Ding W, Ruan R, Zou L, Chen M, Wei P, Wen L Tags: Ann Biomed Eng Source Type: research

Direct Imaging of siRNA Electrotransfer at the Single-Cell Level
In this study, we investigated, by direct visualization at the single-cell level, the electro-delivery of Alexa Fluor 546-labeled siRNA into murine melanoma cells stably expressing the enhanced green fluorescent protein (EGFP) as a target gene. The electrotransfer of siRNA was quantified by time-lapse fluorescence microscopy and was correlated with the silencing of EGFP expression. A direct transfer into the cell cytoplasm of the negatively charged siRNA was observed across the plasma membrane exclusively on the side facing the cathode. The oligonucleotide then freely diffused across the cytosol. Therefore, we show that th...
Source: Springer protocols feed by Genetics/Genomics - February 13, 2014 Category: Genetics & Stem Cells Source Type: news

Inhibition of Cancer Cell Growth by GRP78 siRNA Lipoplex via Activation of Unfolded Protein Response.
Abstract Proteasome inhibitors are a novel class of molecular-targeted anti-cancer drugs that suppress the degradation of malfolded proteins, trigger endoplasmic reticulum (ER) stress, and activate apoptosis signals. Glucose-regulated protein 78 (GRP78), a major ER chaperone, is one of the most important molecules for transduction of unfolded protein response (UPR) signals. In accordance with past findings that expression of GRP78 is elevated in cancer cells and helps to resist stress-induced apoptosis, GRP78 knockdown could be effective in anticancer therapy. We tested this hypothesis and found that transfection ...
Source: Biological and Pharmaceutical Bulletin - April 6, 2014 Category: Drugs & Pharmacology Authors: Matsumura K, Sakai C, Kawakami S, Yamashita F, Hashida M Tags: Biol Pharm Bull Source Type: research

Construction and evaluation of an efficient C ‐Jun siRNA to downregulate matrix metalloproteinase in human keratinocytes and fibroblasts under UV exposure
ConclusionThus, C ‐Jun‐h‐825 siRNA might help restore skin collagen by decreasing MMP expression in cells exposed to UVA. Constructs and vectors designed herein have the potential to be translated into a treatment for photoaging induced skin cancer.
Source: Molecular Genetics & Genomic Medicine - November 13, 2019 Category: Genetics & Stem Cells Authors: Hong Xiao, Ruinian Yang, Fang Yang, Yanan Zhao, Yin Liu Tags: ORIGINAL ARTICLE Source Type: research

Efficient Inhibition of Uveal Melanoma via Ternary siRNA Complexes
Publication date: Available online 23 November 2019Source: International Journal of PharmaceuticsAuthor(s): Lingxiao Xie, Yan Yang, Jie ShenAbstractUveal melanoma (UM) is rare yet the most common and malignant primary intraocular tumor in adults. Due to the lack of effective treatment, the mortality rate of UM has remained high over the past few decades. In the present study, hyaluronic acid (HA) coated chitosan (Chi)/siRNA ternary complexes have been developed and characterized as a novel therapeutic strategy molecularly targeting hypoxia-inducible factor 1α (HIF-1α) pathway for the treatment of UM. The cytotoxicity, ce...
Source: International Journal of Pharmaceutics - November 23, 2019 Category: Drugs & Pharmacology Source Type: research

Enhancing anti-melanoma outcomes in mice using novel chitooligosaccharide nanoparticles loaded with therapeutic survivin-targeted siRNA.
In conclusion, PBA-modified COSs can serve as a promising carrier for siRNA delivery in the field of anti-tumor therapy. PMID: 33220463 [PubMed - as supplied by publisher]
Source: European Journal of Pharmaceutical Sciences - November 18, 2020 Category: Drugs & Pharmacology Authors: Liu X, Chen L, Zhang Y, Xin X, Qi L, Jin M, Guan Y, Gao Z, Huang W Tags: Eur J Pharm Sci Source Type: research

Abstract 1428: Targeting RRM2 by siRNA inhibits cellular invasion and represents a rational approach for inhibition of metastasis of head and neck and lung cancers
Background: Ribonucleotide reductase subunit M2 (RRM2) has been frequently observed to be aberrantly overexpressed in various tumors. RRM2 is a key enzyme, and essential regulator of balanced deoxyribonucleotides (dNTPs). It is critical for DNA replication and repair, and hence cell survival. In addition to DNA synthesis, it has been reported to modulate cellular invasiveness. However, the mechanisms through which RRM2 affects the invasive phenotype have not been elucidated.Methods: We evaluated the expression of RRM2 protein in metastatic (n = 40) and non-metastatic (n = 40) head and neck squamous cell carcinoma (HNSCC) t...
Source: Cancer Research - August 2, 2015 Category: Cancer & Oncology Authors: Rahman, M. A., Amin, A. R. M. R., Zhang, J., Nannapaneni, S., Saba, N. F., Chen, Z. G., Shin, D. M. Tags: Tumor Biology Source Type: research

Mutation-Targeted siRNA Therapy for Connexin 26-Associated Keratitis-Ichthyosis-Deafness Syndrome
ConclusionTo that end, a KID syndrome cell line (KID-KC) was established from primary keratinocytes of a KID syndrome patient with heterozygous p.D50N mutation, which displayed impaired gap junction intercellular communication and hyperactive hemichannels, confirmed by dye transfer, patch clamp and neurobiotin uptake assays. In KID-KCs, treatment with AS-siRNA led to robust inhibition of the mutant GJB2 allele without altering expression of the wildtype allele. This resulted in correction of both gap junction intercellular communication and hemichannel activity. Furthermore, AS-siRNA treatment caused only low-level off-tar...
Source: Cytotherapy - May 24, 2019 Category: Cytology Source Type: research

Akt1 and Jak1 siRNA based silencing effects on the proliferation and apoptosis in head and neck squamous cell carcinoma.
In conclusion, the combination of siRNA-mediated gene-silencing strategy can be considered as a valuable and safe approach for sensitizing cancer cells to chemotherapeutic agents thus proposed further studies regarding this issue to approve some siRNA based therapeutics for using in clinic. PMID: 31348981 [PubMed - as supplied by publisher]
Source: Gene - July 22, 2019 Category: Genetics & Stem Cells Authors: Saatloo MV, Aghbali AA, Koohsoltani M, Khosroushahi AY Tags: Gene Source Type: research

Construction of Ang2-siRNA chitosan magnetic nanoparticles and the effect on Ang2 gene expression in human malignant melanoma cells.
Authors: Liu ZL, You CL, Wang B, Lin JH, Hu XF, Shan XY, Wang MS, Zheng HB, Zhang YD Abstract The aim of the present study was to construct angiopoietin-2 (Ang2)-small interfering (si)RNA chitosan magnetic nanoparticles and to observe the interference effects of the nanoparticles on the expression of the Ang2 gene in human malignant melanoma cells. Ang2-siRNA chitosan magnetic nanoparticles were constructed and transfected into human malignant melanoma cells in vitro. Red fluorescent protein expression was observed, and the transfection efficiency was analyzed. Reverse transcription-quantitative polymerase chain re...
Source: Oncology Letters - June 19, 2016 Category: Cancer & Oncology Tags: Oncol Lett Source Type: research

Enhancing radiosensitivity of TE1, TE8, and TE 11 esophageal squamous carcinoma cell lines by Hdm2-siRNA targeted gene therapy in vitro.
CONCLUSION: Increasing radiosensitivity of tumor cells may be provided by silencing the oncogenes. PMID: 27525226 [PubMed]
Source: BioImpacts - August 16, 2016 Category: Research Tags: Bioimpacts Source Type: research