Categories
+ DNA
+ Nanoparticle
+ Protein
- RNA
3' end analysis
Electrophoresis
Epitranscriptome
miRNA interference
miRNA-mRNA interaction
mRNA translation
qRT-PCR
Reverse transcription
RNA capping
RNA degradation
+ RNA detection
RNA extraction
RNA interference
RNA labeling
RNA localisation
RNA Modification
+ RNA purification
RNA sequencing
RNA splicing
RNA structure
RNA synthesis
RNA-protein interaction
Transcription
Transfection
Protocols in Past Issues

Simultaneous Capture of Chromatin-Associated RNA and Global RNA–RNA Interactions With Reduced Input Requirements

CD Cheng Ding
GC Guoting Chen
SL Shiping Luan
YG Yuanyuan Gong
CG Cuilin Gui
CY Chen Yang  [...]
XL Xingwang Li
+ 4 Authors
3749 Views
Sep 5, 2025

Chromatin-associated RNAs (caRNAs) have been increasingly recognized as key regulators of gene expression and genome architecture. A few technologies, such as ChRD-PET and RedChIP, have emerged to assess protein-mediated RNA–chromatin interactions, but each has limitations. Here, we describe the TaDRIM-seq (targeted DNA-associated RNA and RNA–RNA interaction mapping by sequencing) technique, which combines Protein G (PG)-Tn5-targeted DNA tagmentation with in situ proximity ligation to simultaneously profile caRNAs across genomic regions and capture global RNA–RNA interactions within intact nuclei. This approach reduces the required cell input, shortens the experimental duration compared to existing protocols, and is applicable to both mammalian and plant systems.

Isolation and Transcriptomic Profiling of Single Myofibers from Mice

FC Francesco Chemello
EA Enrico Alessio
LB Lisa Buson
BP Beniamina Pacchioni
CM Caterina Millino
GL Gerolamo Lanfranchi
Stefano   Cagnin Stefano Cagnin
6997 Views
Oct 5, 2019
Skeletal muscle is composed of different cells and myofiber types, with distinct metabolic and structural features. Generally, transcriptomic analysis of skeletal muscle is performed using whole muscle, resulting in average information as all cells composing the organ contribute to the expression value detected for each gene with the loss of information about the distinctive features of each specific myofiber type. Since myofibers are the smallest complete contractile system of skeletal muscle influencing its contraction velocity and metabolism, it would be beneficial to have fiber-specific information about gene expression. Here, we describe a protocol for the isolation and the transcriptomic analysis of single individual myofibers. The protocol was set up using single myofibers isolated from soleus and Extensor Digitorum Longus (EDL) muscles, but it can be applied to all skeletal muscles. Briefly, muscles are enzymatically dissociated and individually collected. Long RNAs (> 200 nt) and short RNAs (< 200 nt) are separately purified from each myofiber and used to produce libraries for microarray or sequencing analysis. Through this approach, myofiber-specific transcriptional profiles can be produced, free from transcripts from other non-contractile cell types, in order to identify mRNA-miRNA-lncRNA regulatory networks specific for each myofiber type.

Generation of microRNA Sponge Library

Sebastian   Herzog Sebastian Herzog
8432 Views
Apr 20, 2018
This protocol describes the generation and functional validation of microRNA (miRNA) sponge or decoy constructs. When expressed from a strong promoter, these transcripts can sequester specific miRNA:RISC complexes, thereby resulting in a derepression of endogenous target mRNA. Hence, cells expressing such sponges display a partial or full miRNA loss-of-function phenotype.

Depending on the sponge sequence, the activity of any miRNA of choice can be inhibited by sponge sequestration, but it should be noted that these constructs do not seem to be specific for one particular miRNA. Rather, all miRNAs of the same family as defined by the seed sequence will be affected, albeit to a different degree.

Biotinylated Micro-RNA Pull Down Assay for Identifying miRNA Targets

PP Pornima Phatak
JD James M Donahue
20013 Views
May 5, 2017
microRNA (miRNA) directly associates with its target transcripts (mRNA). This protocol describes a method for detection of direct interaction between miRNA and mRNA. The result of interaction helps screening the specific target mRNAs for a miRNA.