As seen with stimulated T cells (Fig. 3C), Cbl - b − / − and DKO CD8 +
T cells produced higher levels of IFN - γ compared with DGKζ − / − or WT CD8 + T cells (Fig. 3F) in a manner that was enhanced by the presence of additional IL - 2 (Fig. 3F).
However, lymphocytes isolated from recipients of either CD8 + T cells or CD8 −
T cells produced significant in vitro apoptosis of donor - specific corneal endothelial cells.
In this image, the top row shows few T cells in untreated mice, while the bottom rows show many
T cells produced after immunotherapy treatment.
The memory T cells were also better at juggling tasks: Whereas individual naïve
T cells produced only one specific cytokine, each memory cell churned out a number of them, in amounts up to 50 times higher.
In the tea drinkers» immune systems, gamma delta
T cells produced five times more infection - fighting interferon when exposed to disease - causing bacteria than did the T cells of the coffee drinkers.
They found that gamma delta
T cells produce far more infection - killing chemicals, including interferon, when exposed to large quantities of ethylamine, an alkylamine antigen.
That is why loss of autophagy in regulatory
T cells produces a two-fold effect on both survival and stability.»
Using a combination of biochemical and genetic approaches, Darnell's lab discovered that the immune systems of PND patients thwart tumors with what is essentially an antiviral response: The patients»
T cells produce CD8 + killer T cells that recognize the neuronal antigens present within their tumors.
We therefore tested whether both the αβ and γδ subsets of IL7RαhiCcr6 +
T cells produce IL17 in skin draining LNs following bacterial or fungal challenge.
Not exact matches
These growth modulators are
produced either by the epithelial
cells of the mammary gland or by activated macrophages, lymphocytes (mainly
T cells), or neutrophils in the milk.
This colonizing bacterial strain, in the presence of specific milk oligosaccharides,
produces factors that enhance
T regulatory
cell activity and promote interestinal tolerance (18).
At that point,
T -
cells give it approval to divide rapidly and
produce millions of daughter B -
cells that can churn out the specific antibody.
From the beginning, CAR -
T cells were tough to
produce.
The mice
produced more memory
T -
cells, which kick in when bugs come back, than mice not given the drug.
Human
cells infected by the viruses
produced the gene products, giving
T cells an advance exposure to them.
She found «an increase in IgA -[immunoglobulin --RSB-
producing B
cells in both the colon and the lymph nodes» as well as an increase in
T helper
cells in the lymph nodes.
Not only do controllers have more CD8
T cells, each
cell produces greater quantities of perforin and granzymes, which stimulate apoptosis, or
cell death.
When they examined mice genetically incapable of
producing Helios, they found the animals beset by a
T -
cell and antibody attack on normal tissue.
«Severe allergic asthma with neutrophils is due to increased IL - 17A expression
produced by
T - helper 17
cells,» explained Ryffel.
Researchers are developing many different versions of CAR -
T cell therapies, but the basic premise is the same: Doctors remove a patient's
T cells (immune system
cells that attack invaders) from a blood sample and genetically modify them to
produce artificial proteins on their surfaces.
Using a novel isolation method, scientists isolated
T cells from synovial fluid from patients with rheumatoid arthritis that
produced IL - 21 and TNF and compared these with
cells that did not
produce this cytokine.
But roundworms seem to shift the balance of the immune system towards
producing more type 2
T cells.
Hookworm infections seem to provoke a mix of two different immune
cells: type 1
T cells, which instruct other
cells to directly attack pathogens, and type 2
T cells, which tell
cells to
produce antibodies.
This made it possible for their immune systems to
produce sufficient amounts of CD8
T cells that were primed to attack and kill HIV - infected
cells.
The ability of tumor - infiltrating lymphocytes (TILs) such as
T cells to
produce multitudes of clones that overwhelm and effectively control cancer
cells has been demonstrated, but the significance of the composition of
T -
cell repertories is unknown.
University of Alabama at Birmingham researchers have now shown that activated
T -
cells — part of the immune system's inflammatory response — are both necessary and sufficient to
produce such heart failure.
These include pro-inflammatory
T helper
cells, or Th1, that
produce interferon - γ and interleukin - 2, or IL - 2; anti-inflammatory Th2
cells that
produce IL - 4, IL - 5 and IL - 13; pro-inflammatory Th17
cells that secrete IL - 17; and immunomodulatory regulatory
T -
cells, or Tregs, that globally suppress activation of immune responses.
There, they began to specialize, creating all of the secondary or «daughter»
cells that such stem
cells normally
produce — including healthy
T cells with functioning ADA genes.
Rick Maizels at the University of Edinburgh and his colleagues find that the worms manipulate their hosts into
producing cells called regulatory
T cells, which calm the immune system.
To engineer an APC - mimetic scaffold, the team first loaded tiny mesoporous silica rods (MSRs) with Interleukin 2 (IL - 2)-- an APC -
produced factor that prolongs the survival of associated
T cells.
Among the protagonists are B
cells, which
produce antibody molecules able to neutralize pathogens or mark them for destruction, and
T cells, which prompt infected
cells to kill themselves or secrete chemicals that direct the activities of other immune players.
The team also detected high levels of interferon gammaa protein
produced by
T cells that blocks the growth of viruses and renders
cells resistant to viral infection.
As with innate immunity, the adaptive immune system — the
T cells and antibodies
produced by B
cells that target specific molecules on invading
cells — contributes to pathology or may also fight against it.
If the study holds up and some miscarriages are in fact due to failure of the fetal
cells to
produce enough IDO, then drugs might be developed that mimic the enzyme's
T cell - dampening effects.
One study showed that ovarian tumors
produce a signaling molecule that serves to attract regulatory
T cells, a subclass of adaptive immune
cells responsible for quieting other
T cells.
The orbital remodeling in TED is likely induced by infiltrating
T lymphocytes and mast
cells, which activate orbital fibroblast effector
cells to either proliferate and form scar -
producing cells called myofibroblasts or turn into pro-inflammatory fat
cells.
In psoriasis, another kind of
T cell, CD49a - accumulates in the afflicted skin and
produces the inflammation - causing protein IL - 17.
But in April 2006, Hans - Reimer Rodewald, an immunologist at the University of Ulm in Germany, reported that mice have two thymus organs — one of them somehow undiscovered — and that both can
produce immune
cells called
T lymphocytes.
Until now, no one has pinpointed which
cells produce the small protein, called Flowering Locus
T (FT).
Upon further investigation, they found that IL - 17 was
produced by gamma delta
T cells, a type of immune
cell found in mucosal tissues.
It also interferes with CD8
T cells ability to
produce cytokines, chemical messengers that recruit other arms of the immune system.
We have shown that
T cells can locally
produce commercial therapeutics (such as antibodies) in a solid tumor.
Studies on the gut suggest that dendritic
cells there release a chemical that induces
T cells to
produce a receptor that helps them home in on the intestine.
This result reflected earlier findings that ILC and
T cell subclasses
produce similar sets of cytokines, but also revealed differences in how the two
cell types control the activities of these key immune response genes.
Moreover, ILC3s then
produce factors that promote
T cell responses.
In principle, we hope to engineer
T cells or other
cell types to reside in the body long - term and
produce therapeutics if they recognize disease or recurrence of disease.
Recent work has revealed that ILCs and
T cells mirror each other in their subclasses, which are defined by the kinds of cytokines they
produce.
Studies in mice suggest that the technique eliminates
cells in the thymus (the gland that
produces immune
cells known as
T cells) that otherwise cause the organ - rejecting immune response.
Working in mice, the researchers analyzed regions of the genome that control the cytokine genes
produced by both ILCs and
T cells.
T lymphocytes and NH
cells in the asthmatic lung
produce proteins named interleukin (IL)-5 and IL - 13 that are responsible for severe airway inflammation.