One target
of this autoimmune response is tissue transglutaminase (tTG), an enzyme that modifies a component of gluten (gliadin) to a form that more strongly stimulates T cells.
In their latest work, reported online in the Journal of Clinical Investigation, the scientists analyzed blood from such mice and identified two types
of autoimmune response directed specifically against the protein, with the first response directed by a specialized kind of immune system cells called T cells and the second by antibodies.
With what we've recently come to understand in terms
of the autoimmune response in type 1 diabetes, to what degree do you think this knowledge will be more generally applicable to other autoimmune diseases such as Crohn's and lupus?
The Bristol group has now revealed how the administration of fragments of the proteins that are normally the target for attack leads to correction
of the autoimmune response.
Errors in the interpretation of the signals that the tissue sends to the immune cells are the basis of defective wound healing and play a still poorly defined role in the establishment
of autoimmune responses and in the most common pregnancy complications, such as recurrent abortion, preeclampsia and intrauterine growth restriction.
Not exact matches
In celiacs, gluten triggers an
autoimmune response whose effects include gastrointestinal distress, chronic fatigue, anemia, osteoporosis, depression and even a heightened risk
of intestinal cancer.
Gluten sensitivities cause an
autoimmune response that attacks the lining
of the small intestine.
However, these same inflammatory
responses can become part
of a disease if they mistakenly target the body's own cells, such as occurs in the case
of autoimmune conditions like Crohn's disease.
The scientists zeroed in on a type
of immune cell called regulatory T - cells, which were known to suppress
autoimmune responses.
«If we learn how to control dendritic cells, we could strengthen our immune
response to infection when needed, or weaken the action
of certain immune cells that attack the body's own tissues in
autoimmune disease.»
But Acinetobacter also ramped down the production
of regulatory T cells, which help prevent
autoimmune diseases by dampening the immune
response.
Over the course
of several visits, Bolte studied Palmer's food diaries and helped him nail down which foods were most likely to trigger the painful
autoimmune response.
We are currently working with Linda Bradley, Ph.D., professor in the Immunity and Pathogenesis Program, and co-author
of the study, to couple our approach with an approach to reining in the
autoimmune response,» added Levine.
Dr. Joaquín Espinosa is enthusiastic about the results
of his study, «The constant activation
of the Interferon
response could explain many aspects
of Down syndrome, such as cognitive deficit, stunted growth, increased prevalence
of autoimmune disorders, high risk
of Alzheimer's disease, and protection against solid tumors.»
Autoimmune diseases arise from an overactive immune
response of the body against substances and tissues normally present in the body; in other words, the body attacks its own cells.
For example, some cases
of multiple sclerosis are thought to result from
autoimmune activity in
response to an infection in the central nervous system and cerebrospinal fluid.
The researchers tested these cells on a batch
of mice that had been injected with myelin basic protein, which triggers the
autoimmune response and causes EAE symptoms to occur in about 2 weeks.
An insufficient or overactive immune
response is at the heart
of countless pathologies including cancer,
autoimmune diseases, and infectious diseases.
The answer is complicated, he adds, but much
of it involves a delicate balancing act among elements
of the immune system: while immunity protects us against disease, an overly aggressive immune
response may trigger dangerous, even life - threatening,
autoimmune reactions in which the body attacks itself.
A new study from the Gladstone Institutes shows that a single drop
of blood in the brain is sufficient to activate an
autoimmune response akin to multiple sclerosis (MS).
In the trial, 18.1 %
of people taking alemtuzumab experienced thyroid - related
autoimmune responses, and 0.8 % developed the potentially life - threatening condition immune thrombocytopenia.
This jump - started cell division is called immune cell activation and is an important component
of both normal immune
responses and
autoimmune reactions.
Although it has been suggested that resveratrol has anti-inflammatory properties, in this study resveratrol did not suppress
autoimmune responses as measured by levels
of MOG35 -55-specific lymphoproliferative
responses and pro-inflammatory cytokine production.
And after decades
of puzzling over what causes narcolepsy's fits
of daytime sleep and muscle paralysis, researchers suspect it's a
response to an
autoimmune disease.
This incompletely inactivation
of genes on the X chromosome, including many immunity - related genes, may help explain why females are predisposed to many
autoimmune conditions and also have stronger immune
responses than males.
«Because JAK3 has such an isolated role in the immune system, we believe that inhibiting it will lead to a suppression
of immune
responses which could be used to treat
autoimmune disorders like psoriasis and rheumatoid arthritis.
Previous research has indicated that salt may alter the
autoimmune response, which is implicated in the development
of multiple sclerosis (MS), but it is not clear if it has any direct effect on the course
of the disease itself.
Because these islets carried the kind
of peptide that spleen cells use to reeducate the immune system, they were able both to control blood sugar and to end the
autoimmune response.
Why the disease has such a wide range
of effects isn't completely understood, but in recent years a potential cause — the loss
of hormone - producing neurons, possibly through an
autoimmune response — has been identified.
«This «standby» mode lowers the immune
response threshold, which is helpful in fighting an infection, but could also set the stage for an
autoimmune disease where the immune
responses are out
of control.»
This
autoimmune response may contribute to the progression
of the disease, the researchers report online June 21...
These signals prompt a cascade
of defenses designed to kill the pathogen; however, in a person with
autoimmune disease, these inflammatory
responses inexplicably turn against normal tissue.
Researchers from the Perelman School
of Medicine at the University
of Pennsylvania recently found a shared genetic link in the
autoimmune response among PV patients that provides important new clues about how autoantibodies in PV originate.
In an experimental model
of type 1 diabetes and in the humanized model, this treatment resulted in a significantly lower
autoimmune response.
In recent years, researchers have successfully countered
autoimmune diseases like rheumatoid arthritis by suppressing the immune
response with antibodies engineered to stop the action
of TNF - a.
Up to now research has often viewed
autoimmune disease as the result
of immune system hyperactivity, yet recently it has become increasingly clear that such ailments may also result from an immune system those
responses are too weak.
Displaced bacteria can activate
autoimmune responses and inflammation, which are known to be associated with the onset
of depression, lower mood and fatigue.
It included a 1994 report from the Institute
of Medicine that said it was biologically plausible for a vaccine to «induce... an
autoimmune response... by nonspecific activation
of the T cells directed against myelin proteins.»
One way to improve
autoimmune response is to use nanotechnology to encourage the growth
of health - enhancing microbiomes in homes and schools.
The Joslin scientists will study the effects
of introducing various strains
of gut bacteria that may increase or decrease inflammatory
responses that may fuel the
autoimmune reaction.
Rarely, immunotherapy will trigger a severe
autoimmune response that can cause inflammation
of the liver, lungs, or colon.
«It's the first time we can really prove that a vaccine or an immune
response can trigger an
autoimmune disease,» says Emmanuel Mignot, director
of Stanford University's Center for Sleep Sciences and Medicine.
The scientists speculate in their PNAS article, «the Ro autoantigen may not be simply a passive target in the lupus immune
response but, instead, may be important for the prevention
of autoimmune disease.»
Understanding the exact mechanisms
of immunity and immune
response will allow for new treatments for
autoimmune and immune - related disorders.
The decline
of the immune system with age (immunosenescence) is reflected in the increased susceptibility to infectious diseases, poorer
response to vaccination, increased prevalence
of cancer, accelerated aging (frailty),
autoimmune and other chronic diseases.
The laboratory has investigated the roles
of these molecules in inflammatory and
autoimmune diseases to determine if modulating their activity alters the immune
response and may be useful for therapeutic intervention.
ß1 - Adrenergic Receptor Contains Multiple IAk and IEk Binding Epitopes That Induce T Cell
Responses with Varying Degrees
of Autoimmune Myocarditis in A / J Mice.
These kinds
of inflammatory
responses have been linked to diabetes, heart disease and a variety
of autoimmune disorders.
In Stiff Person Syndrome, which is a rare
autoimmune disease in the central nervous system with autoantibodies targeting glutamic acid decarboxylase (GAD65), the humoral
autoimmune response was shown to consist
of a Rituximab - sensitive part rapidly cleared after treatment, and a Rituximab - resistant part from long - lived and persistent plasma cells acting as a reservoir for secretion
of autoantibodies.
• In nutrigenetics, the aim is to understand how genetic makeup determines
response to diet and susceptibility to diet - related disease — i.e., a number
of genetic variations have been shown to increase the susceptibility to Type 2 diabetes, obesity, cardiovascular diseases and some
autoimmune diseases and cancers.