Heterologous protein production in yeast expression systems (i.e., Kluyveromyces lactis and Pichia pastoris) normally involves insertion of a linear expression cassette into a target locus in the host genome (1-3). Typically, an expression cassette is assembled in E. coli by first cloning a gene of interest into a circular expression vector (Figure 1A). The expression cassette comprises DNA enc...

Abstract Purpose Owing to the complexity of cancer, a synergistic combination chemotherapy and gene therapy can be promising therapeutic strategy. This study aimed use stem cell membrane (SCM)-camouflaged polydopamine nanoparticles for simultaneous delivery curcumin (CUR) siRNA-targeting STAT3 (CPDA/ siSTAT3 @SCM NPs) osteosarcoma (OS). Methods Transmission electron microscopy, UV–Vis absorbanc...

Cellular delivery of small interfering RNAs to target cells of a tissue has the potential to travel by two intercellular pathways. For intimately apposed cells gap junctions allow transport exclusive of the extracellular space. For cells not in intimate contact, exocytotic release of vesicular contents and subsequent retrieval via endocytosis of exosomes and other vesicular contents represent a...

In some mammalian systems small interfering RNAs (siRNA) targeting homologous sequences in promoter regions of genes induce transcriptional gene silencing (TGS). We have previously reported the induction of TGS by an siRNA (prom-A siRNA) targeting the tandem NF-kappaB-binding motifs within the human immunodeficiency virus, type 1 (HIV-1), promoter region. Here we report that induction of TGS by...

p53, a pivotal protein in the apoptotic pathway, has been identified as a mediator of transcriptional responses to ischemia-reperfusion (IR) injury. The characteristics and functional significance of the p53 response in vivo are largely unknown in IR-induced kidney injury. Therapeutic opportunities of delivering small interfering RNA (siRNA) via venous injection have gained recognition; however...

A vaginal microbicide should prevent pathogen transmission without disrupting tissue barriers to infection. Ideally, it would not need to be applied immediately before sexual intercourse, when compliance is a problem. Intravaginal administration of small interfering RNA (siRNA) lipoplexes targeting Herpes Simplex Virus Type 2 (HSV-2) genes protects mice from HSV-2. However, protection is short-...

Figure 1. Small RNA molecules, miRNA and siRNA, regulate mRNA translation through RNA interference (RNAi). Depending on the level of complementarity between the small RNA molecule and mRNA, the mRNA will be silenced (complete) or translationally repressed (partial). siRNA off-targeting effects occur through partial complementarity of the siRNA with unintended mRNA targets. Since the discovery t...

RNA interference has become widely used as an experimental tool to study gene function. In addition, small interfering RNA (siRNA) may have great potential for the treatment of diseases. Recently, it was shown that siRNA can be used to mediate gene silencing in mouse models. Locally administered siRNAs entered the first clinical trials, but strategies for successful systemic delivery of siRNA a...

Objective: To Research of hiperfect-mediated RNA interference targeting human telomerase reverse transcriptase gene (hTERT) on the biological behavior malignant melanoma cell line A375.Methods: Specific siRNAs with green fluorescent labeling different concentrations were transfected into A375 cells by using transfection reagent (Hiperfect) at volumes . The efficiency was determined fluorescen m...

siRNA and microRNA are promising therapeutic agents, which are engaged in a natural mechanism called RNA interference that modulates gene expression posttranscriptionally. For intracellular delivery of such nucleic acid triggers, we use sequence-defined cationic polymers manufactured through solid phase chemistry. They consist of an oligoethanamino amide core for siRNA complexation and optional...