T -
Cell Enzyme Uses Deadly Multipronged Attack on Bacteria — GEN News Paper: Granzyme B Disrupts Central Metabolism and Protein Synthesis in Bacteria to Promote an Immune Cell Death Program — Farokh Dotiwala — Cell
Not exact matches
A research group at Cincinnati Children's Hospital Medical Center
used human pluripotent stem
cells (hPSCs) to grow human stomach tissue (paywall)-- and, notably, the part of the organ that produces digestive
enzymes.
What about some 2,000 proteins that are
used by a human
cell as
enzymes?
Within a
cell are some 2,000 proteins that are
used as
enzymes.
It activates
enzymes responsible for the production of neurotransmitters — chemicals your brain
cells use to relay information.
The researchers
used a drug called clorgyline to inhibit the activity of the MAOA
enzyme; the drug disrupted the signaling system that led to cancer
cell invasion and proliferation.
TruePrime LB addresses current liquid biopsy sensitivity and specificity issues by
using adapted amplification of cancer - specific, large - fragment,
cell - free DNA based on primer - free technology that combines the
enzymes TthPrimPol and Phi29 DNA polymerase.
Nanog and Sox2 are among the
enzymes used by researchers to generate iPSCs, therefore ZFP217 may represent another tool needed to achieve tight control over
cell reprogramming.
Fischetti and his colleagues
used a phage - encoded molecule to identify a bacterial target
enzyme called 2 - epimerase, which is
used by Bacillus anthracis to synthesize an essential
cell wall structure.
Plays an important role in the structure of the skeleton and muscles; also found in molecules that help
enzymes use ATP to supply energy for chemical reactions in
cells.
Lu's team will extract immune
cells called T
cells from the blood of the enrolled patients, and then
use CRISPR — Cas9 technology — which pairs a molecular guide able to identify specific genetic sequences on a chromosome with an
enzyme that can snip the chromosome at that spot — to knock out a gene in the
cells.
Using the new gene - editing
enzyme CRISPR - Cpf1, researchers at UT Southwestern Medical Center have successfully corrected Duchenne muscular dystrophy in human
cells and mice in the lab.
The
enzyme was tested in three different
cell lineages: leukemia
cells incapable of producing asparagine at normal levels (MOLT4); another line of leukemia
cells, in this case capable of producing asparagine at normal levels (REH); and non-malignant
cells,
used as a control (HUVECs).
Using the same computer - based approach, the team has now been able to target the c - FLIP (cellular FLICE [FADD - like IL - 1β - converting
enzyme]- inhibitory) protein, known to play a key role in cancer stem
cell maintenance and survival, described in previously published work by the Institute.
Microbes living in oxygen - rich environments
use enzymes floating free inside their
cells to digest such plant matter.
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.
After just a single dose, rat intestinal
cells pumped out bacterial lactase for up to 6 months — showing that the gut
cells had inserted the gene into their DNA and were
using it to manufacture the
enzyme.
«The model we are proposing is one wherein colon cancer
cells release an
enzyme outside the
cell, where it attaches a high - energy phosphate to the metabolite creatine, and then imports this energetic metabolite into the
cell to be
used as energy,» Tavazoie says.
Before now, a lot of this epigenetic research had been done in yeast — single
cell organisms that also
use enzymes to lay chemical tags on histone proteins.
In the current study, Yu - Shang Lee, PhD, of the Cleveland Clinic, together with Jerry Silver, PhD, of Case Western Reserve Medical School, and others,
used a chemical that promotes
cell growth along with a scar - busting
enzyme to create a more hospitable environment for the nerve graft at the injury site.
Insulin is an
enzyme that helps transport sugars from the blood into
cells for
use as fuel.
That statement is misleading because the only «appropriate conditions» known to do this occur in actual living
cells, and they
use protein
enzymes — which are not applicable to the origin of life — to do so.
The new study shows that the synthetic compound is capable of inhibiting the activities of several DNA - processing
enzymes, including the «integrase»
used by the Human Immunodeficiency Virus (HIV) to insert its genome into that of its host
cell.
«Our data provide hints that you might not need to
use a broad spectrum antimicrobial and might be able to target the
enzyme or
cell wall of the fungi to disrupt the plaque biofilm formation.»
For instance, researchers
used virtual screening to identify compounds that target the gene for PFKFB3, an
enzyme that helps regulate the metabolism of cancer
cells.
After
using the
enzyme to cause rod
cell death in the fish, the researchers added the anti-inflammatory drug to the water to reduce microglia reactivity.
Ali found that breast cancer
cells that have high levels of RYBP are more sensitive to DNA damage after radiation or drug treatment, including PARP inhibitors (inhibitors of the
enzyme poly ADP ribose polymerase
used in cancer treatment).
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.
The researchers
used a technique called activity - based protein profiling, which allowed them to screen the molecule's activity against a very large group of
enzymes in living human
cells.
Techniques were
used to measure the activities of the key
enzymes within mitochondria that are involved in producing the skin
cell's energy, a type of mitochondrial gym or skin physical.
Another challenge was to adapt the analysis techniques
used for the
cell molecules — for measuring
enzyme activity, for example — to the minute measurement volumes.
In clinical trials already underway, for example, researchers have
used an older gene - editing technique,
enzymes call zinc finger nucleases, in immune
cells to deactivate the gene for CCR5, a surface protein that HIV latches onto in order to infect
cells.
Using enzymes extracted from Escherichia coli bacteria, her team built an enzymatic fuel
cell two years ago that runs on ethanol and can be attached directly to a circuit.
The team realized that, just like the Cas9 family, Cas13d
enzymes originating from different bacterial species would vary in their activity, so they ran a screen to identify the best version for
use in human
cells.
«Scientists
used to think that these fungi would make holes in the
cell wall that would let in the big
enzymes,» he notes, a sort of pretreatment model.
In experiments
using enzyme inhibitors, the possibility that cinnamtannin B - 1 enhanced mobilization through the
use of activation of
enzymes such as PI3 kinase near the
cell membrane was shown.
«The nanoparticle mimics the behavior of NADPH oxidase, an
enzyme used by immune
cells to kill tumor
cells and infectious agents.
Unfortunately, the
enzymes used in past glucose biofuel
cells were not suitable for implants, because they either required highly acidic conditions to work or were inhibited by a variety of ions found in the body.
Currently, the experimental 2BP compound inhibits any
enzyme that
uses palmitate as a substrate, making it toxic to most
cells.
The team showed how they could flip the direction of this promoter
using bacteriophage
enzymes, whose levels inside the
cells they controlled
using chemicals.
By
using a small molecule called 2 - bromo - palmitate (2BP) that inhibits these palmitate - adding
enzymes, the researchers surmise that cancer patients might be able to one day make their
cells more sensitive to cancer - fighting EGFR inhibitors.
The Salk and TSRI scientists
used a range of neuro - genetic, gene therapy, biochemical and structural biology research techniques to discover that the mutant GlyRS
enzyme blocked molecular signals important for maintaining the health of motor neurons, the
cells that carry messages from the brain to the muscles of the extremities.
The researchers removed immune
cells from the recipient's blood and then disabled a gene in them
using CRISPR — Cas9, which combines a DNA - cutting
enzyme with a molecular guide that can be programmed to tell the
enzyme precisely where to cut.
«While ciclopirox and deferiprone were developed for unrelated
uses, Hartmut's knowledge of
enzymes and pharmacology suggested that both drugs could influence some of the most basic processes that occur within human
cells,» he says.
«Blood cancers develop when immune
cell DNA editing hits off - target spots: Team urges consideration of cutting - and - pasting errors when
using enzymes for gene modification.»
The two most widely
used drugs to treat colorectal cancer act to either inhibit
enzyme activity of cancer
cells or arrest tumor
cell growth.
In studies in the laboratory, researchers from Baylor and the University of Geneva found that sentinel
cells in the multi-cellular social amoeba slug
use a form of toll - like receptor (that recognizes molecules from the microbes), as well as an
enzyme called NADPH oxidase, in order to form these extracellular nets.
An
enzyme used by viruses to break
cell walls beats back bacteria that cause ear infections, pneumonia
The
cell envelops the foreign body and exterminates it specifically by
using reactive oxygen species (ozone, hydrogen peroxide, bleach), generated thanks to the
enzyme NOX2.