Protocol for C. elegans RNAi. Includes: Transformation of competent cells; Blunt-end ligation; Preparation of competent cells; Dephosphorylation of linear plasmid DNA; Restriction Digest: EcoRV; Insert amplification from gDNA; Gel purification: QiaQuick gel purification kit; Mini-prep; Transformant Screening; Bacterial preparation and induction; Preparation of worms for RNAi feeding. - [Read C. elegans RNAi Protocol]
Protocol describes a method to collect early embryos from 6-week-old mice. Subsequently, the isolated embryos can be injected with double-stranded RNA to induce knockdown of a gene of interest. - [Read Collection of Early Mouse Embryos for RNAi Protocol]
Protocol describes a method to collect oocytes from 6-week-old mice. Subsequently, the isolated oocytes can be injected with double-stranded RNA to induce knockdown of a gene of interest. - [Read Collection of Mouse Oocytes for RNAi Protocol]
Cosuppression is a process in Caenorhabditis elegans that closely resembles RNAi. In contrast to RNAi, however, the cosuppression effect in C. elegans does not spread throughout the animal. Cosuppression in C. elegans can be triggered by highly repetitive transgenes that contain gene constructs. - [Read Cosuppression in C. elegans Protocol]
It is possible that some cell lines have lost the ability to perform RNAi or that cells derived from certain tissues do not support RNAi. This reporter assay, for RNAi in mammalian cells, can be used to establish whether the cells under study are susceptible to RNAi. - [Read Cotransfection of Luciferase Reporter Plasmids with siRNA Duplexes Protocol]
This protocol describes the use of a specific antibody that recognizes the targeted gene product to detect RNAi-induced gene knockdown in mammalian cells. Western blot technology can be used as an alternative (see Detection of RNAi-Induced Protein Knockdown in Mammalian Cells by Western Blotting). - [Read Immunofluorescence Detection of RNAi-Induced Protein Knockdown in Mammalian Cells Protocol]
Protocol describes a method for in ovo transfection of avian embryos with double-stranded RNA (dsRNA). The dsRNA is injected into the spinal cord of the embryo. Subsequent electroporation facilitates the cellular uptake of the dsRNA molecules. It may be necessary to optimize the stage of the embryo and the electroporation procedure to improve the effectiveness of in ovo RNAi—cell competence changes with differentiation. - [Read Injection of dsRNA and Electroporation in Avian Embryos Protocol]
Double-stranded RNA (dsRNA) can be efficiently introduced into Caenorhabditis elegans by microinjection into the gonad, the gut, or the body fluid. The RNAi effect will spread within the nematode, exerting an effect beyond the site of injection. - [Read Introduction of Double-Stranded RNA in C. elegans by Injection Protocol]
Double-stranded RNA (dsRNA) can be efficiently introduced into Caenorhabditis elegans by microinjection into the gonad, the gut, or the body fluid. The RNAi effect will spread within the nematode, exerting an effect beyond the site of injection. - [Read Introduction of Double-Stranded RNA in C. elegans by Injection Protocol]
Protocol describes how to introduce a double-stranded RNA (dsRNA) of choice into mouse oocytes or fertilized one-cell embryos by microinjection. For collection of mouse oocytes and early embryos, see Collection of Mouse Oocytes for RNAi and Collection of Early Mouse Embryos for RNAi. - [Read Microinjection of dsRNA into Mouse Oocytes and Early Embryos Protocol]
siRNAs produced upon the addition of dsRNA to Drosophila embryo extract are enriched in a micrococcus-nuclease-resistant fraction. After proteinase K treatment and dephosphorylation with calf intestinal phosphatase, these siRNAs mediate efficient RNAi in vitro. - [Read Preparation of siRNAs from Drosophila Embryo Extracts Protocol]