Ultimately,
cells use this RNA message as instructions for constructing a protein — the huntingtin protein.
At various points in this process,
cells use RNA as a sort of scaffold to help replicate DNA.
Modern
cells use RNA to make proteins, the workhorses of cellular function, but RNA likely preceded both proteins and DNA.
Not exact matches
Antisense drugs are essentially pieces of DNA that bind to specific
RNAs — the recipe that
cells use to make proteins.
The team confirmed that genetic «knockdown» of PRMT1 significantly impaired PDAC
cell growth in vitro through
use of genetic editing tools, including CRISPR and small hairpin
RNA (shRNA).
The team designed DNA circuits that simultaneously test for 24 distinct regions of viral
RNA — more than would have been possible
using only naturally occurring DNA sequences (
Cell, doi.org/wn4).
By
using engineered zinc - finger nucleases (ZFNs) designed to target an integrated reporter and two endogenous rat genes, Immunoglobulin M (IgM) and Rab38, we demonstrate that a single injection of DNA or messenger
RNA encoding ZFNs into the one -
cell rat embryo leads to a high frequency of animals carrying 25 to 100 % disruption at the target locus.
They all
use RNA molecules as messengers to transfer the information from DNA to cellular factories called ribosomes, which then build proteins, which in turn drive our metabolisms and form the structures of our
cells.
The researchers
used the dead guide
RNAs to turn on the Pdx gene in the mice's livers, which caused the liver
cells to produce insulin, reversing the mice's diabetes.
«Controlling
RNA in living
cells: Modular, programmable proteins can be
used to track or manipulate gene expression.»
To more accurately reflect the mechanisms driving oligodendrogliomas, the researchers
used RNA sequencing to study directly, on a single -
cell level, gene expression in samples from six early - stage human tumors.
Using a technique known as single -
cell RNA sequencing, the team explored more than 65,000 individual
cells that exist under normal or inflammatory conditions, looking for genes that were more active in one state or subpopulation versus another.
The
cell uses small
RNAs, known as microRNAs, to accomplish the task.
When the team
used fragments of interfering
RNA to sabotage the production of beta - catenin in these stem
cells, the blood
cells returned to an early leukaemic state.
Using fluorescence inside living
cells as well as biochemistry, they showed that SMN promotes an interaction between the «zipcode» region of a test
RNA and a transport protein.
His laboratory discovered that some of the same
RNA that is inside human
cells are also present in saliva and can be
used to detect diseases — a surprising finding, he said, because enzymes in saliva can degrade
RNA, making the mouth «a hostile environment.»
The viruses also exploit an enzyme that
cells use to destroy
RNA to instead produce short stretches of
RNA that, among other things, may help the virus avoid the immune system of its host.
Plants grown from these
cells make abnormal versions of messenger
RNA, the molecule
used to make the proteins.
Researchers have discovered that, like plants and invertebrate animals, mammals
use the
RNA interference (RNAi) process to destroy viruses within their own
cells.
Cells in most animals and plants
use short - interfering
RNA (siRNA) segments to inhibit the formation of viral proteins; here siRNA designed to target IAPV would be fed to colonies as part of double - stranded
RNA mixed into a syrup.
Quintana - Murci and colleagues
used RNA - sequencing to characterize the way that immune
cells, known as primary monocytes, derived from 200 people of self - reported African or European ancestry would respond to attack by a bacteria or a virus.
First, it is a quality control mechanism
used by
cells to eliminate faulty messenger
RNA (mRNA)-- molecules that are essential for transcribing genetic information into the construction of proteins critical for life.
Using a powerful genetic technology called
RNA - seq, these experiments revealed a nearly comprehensive list of all the genes, including some not previously identified, that guide the development of taste
cells.
DNA - In CRISPR has been specially formulated to enable highly efficient transfection of large plasmids [containing CRISPR - associated protein 9 (Cas9), guide
RNAs, and reporter cassettes], particularly when
using hard - totransfect
cell types.
Hiromi Imamichi, Ph.D., and colleagues
used a technique for creating multiple copies of nearly full - length proviral DNA and
cell - associated HIV
RNA.
In order to locate all gene switches, the Freiburg research team
used modern sequencing methods to examine the entire genome — DNA, epigenetic markers and
RNA — during the development, maturation and disease of human cardiac muscle
cells.
CRISPR is an enzyme that scientists have been able to «program»
using targeting
RNA in order to cut DNA at precise locations that the
cell then repairs on its own.
Instead, the
cell is
used as an isolation compartment for its own
RNA.
The therapy
uses a designer ribozyme, a short strand of
RNA that chops up other
RNA, to seek and destroy mutant
RNA before it can be
used to build a protein that kills the eye's rod
cells.
Reported in Nature Methods today, the new open source computer tool called Single
Cell Consensus Clustering (SC3) was shown to be more accurate and robust than existing methods of analysing single - cell RNA sequence data, and is freely available for researchers to
Cell Consensus Clustering (SC3) was shown to be more accurate and robust than existing methods of analysing single -
cell RNA sequence data, and is freely available for researchers to
cell RNA sequence data, and is freely available for researchers to
use.
Using nanoparticles designed and screened for endothelial delivery of short strands of
RNA called siRNA, the researchers were able to target RNAi to endothelial
cells, which form the linings of most organs.
The SC3 tool was then
used to analyse single -
cell RNA - sequence data from two patients diagnosed with myeloproliferative neoplasm (MPN) blood cancers.
The researchers tested two anti-CK2 drugs for their ability to stimulate the production of new brown fat in mice: a new small - molecule CK2 - blocker called silmitasertib (CX - 4945), which is already in clinical trials as a cancer therapeutic; and a more precise next - generation antisense oligonucleotide (ASO) drug developed in collaboration with Isis Pharmaceuticals, which eliminates CK2 by blocking the
RNA instructions
cells use to produce it.
Using single -
cell RNA sequencing, the team was able to profile molecular features and metabolic activity of individual beta
cells to determine how dividing beta
cells differ from non-dividing
cells.
Split Pool Ligation - based Transcriptome sequencing (SPLiT - seq) is a scalable technique for characterizing
RNA in individual
cells that can be
used to identify the various
cell types found in the brain and other tissues.
The team also studied what happened when PAK4 was removed from the
cells,
using an
RNA silencing technology that can prevent production of specific proteins.
Duax also noted that the results raise questions about some aspects of a hypothesis on the origins of life, called the
RNA world, which posits that
RNA, which is similar to DNA and is still
used in
cells, was the first genetic material.
The
use of
cell surface markers to isolate specific
cell populations is one common method for separating
cells; however, isolating live
cells based on their
RNA expression is a powerful new way enabling the study of small
cell niches in nongenetically modified animal models and human tissue.
The complete structure allows researchers to understand how the polymerase
uses host
cell RNA (red) to kick - start the production of viral messenger
RNA.
HCV invades
cells in the body by binding to specific receptors on the
cell, enabling the virus to enter it.2 Once inside, HCV hijacks functions of the
cell known as transcription, translation and replication, which enables HCV to make copies of its viral genome and proteins, allowing the virus to spread to other sites of the body.2 When HCV enters the host
cell, it releases viral (+)
RNA that is transcribed by viral
RNA replicase into viral -LRB--)
RNA, which can be
used as a template for viral genome replication to produce more (+)
RNA or for viral protein synthesis.
Now, Salk Institute scientists have created a new tool that targets not DNA, but
RNA, and
used it to correct a protein imbalance in
cells from a dementia patient, restoring them to healthy levels.
«In mammals, in the absence of haploid
cells, other approaches have been
used to identify key genes, such as interfering
RNA, but they are sub-optimal methods.
Microbial pathogens induce specific host responses or «
RNA biosignatures» that can be identified
using microarray analyses of blood leukocytes (white
cells).
Doing the screen involves
using short pieces of
RNA, called small hairpin
RNAs, which are inserted into the
cell and are able to halt messages from specific genes, keeping the genes from making proteins.
Using sensitive genetic sequencing technology, the scientists identified unique
RNA splicing variants that distinguish normal, aging stem
cells from abnormal, malignant ones.
The finding was surprising because ZBP1 was known to sense foreign DNA in the
cell, but the influenza virus
uses RNA as its genetic material.
Furthermore, when they blocked the action of the gene
using RNA interference, the
cell proliferation index was reduced.
Using experiments with fruit fly eggs, the team saw that Oskar binds to
RNA within the
cell — specifically three
RNAs derived from genes also known to be important to germline development.
«We're talking about messenger
RNA (mRNA), which is
used by the
cell to synthesize these proteins.»
PARTICLE acts in three different ways to prevent expression of the MAT2A gene: 1) by winding around the MAT2A gene to create a DNA:
RNA triple helix structure locking down the MAT2A gene promoter, 2) by binding the messenger
RNA product of the MAT2A gene and preventing it being
used for MAT2A protein synthesis and 3) transferring MAT2A messenger
RNA into intracellular vesicles that are subsequently ejected from the
cell.