Articles tagged with Immunological Memory
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A new technique from St. Jude Children's Research Hospital provides the most complete picture of a person's entire T-cell repertoire at 10% of the cost of pre-existing approaches, enabling more scientists to study immune responses.
Researchers have developed a research pipeline to create 'universal vaccines' that can address broad viral families and mutated variants. The vaccine design aims to neutralize emerging SARS-CoV-2 variants and other viruses with pandemic potential.
Researchers found that T-bet expression is crucial for preserving the protective memory response in lung and lymph node memory B cells. Continuous T-bet expression in these cells enables their rapid differentiation into antibody-producing plasma cells upon a second flu virus infection.
Scientists have discovered a new immunotherapy strategy using type I dendritic cells to activate strong immune responses and generate immune memory against cancer. The treatment helps prevent tumor relapse in mouse models by triggering an immune memory response.
Researchers found that lemon leafcutter ants increase their cleaning behavior one week and a month after initial contact with a pathogenic fungus, but not after 60 days. The ants recognize the pathogen and recruit more workers to fight it even after multiple re-exposures, indicating a social immune memory.
Scientists at the Institute for Systems Biology have discovered how T cells respond to infections like COVID-19, revealing a predictable pattern based on genetic interactions. This breakthrough could lead to improved treatments and vaccine strategies for diseases such as cancer and autoimmune disorders.
A recent study published in Cell discovered that strokes can change the epigenetics of the immune system, particularly in the heart, leading to scarring and impaired pumping function. The researchers identified IL-1b as the main culprit behind these epigenetic modifications, which can drive inflammatory cardiac dysfunction.
Researchers from Wyss Institute and Harvard University developed a biomaterial vaccine that enhances and sustains lymph node expansion, leading to more effective anti-tumor responses. The vaccine formulation, based on microscale mesoporous silica rods, reprograms antigen-presenting cells to orchestrate complex immune responses.
A study published in Cell Reports found that early-life pain experiences can lead to genetic changes in macrophage cells, resulting in more intense pain reactions later in life. The researchers suggest targeting these genetic changes could help prevent long-lasting pain memories.
Researchers at Brigham and Women's Hospital discovered that astrocytes, non-immune cells, can develop aspects of immune memory. This epigenetic memory promotes CNS pathology in autoimmune inflammation, including chronic neurologic disorders like multiple sclerosis.
ISB researchers identify NKG2A-biased immune responses as protective against decreased inflammation and increased survival rates in various disease contexts. The study suggests potential therapeutic targets for modifying immune responses across diseases.
A recent study published in Nature found that smoking has a lasting effect on the immune system, with certain defense mechanisms persisting for up to 10-15 years after quitting. The research used a large cohort of healthy volunteers and identified three key factors: smoking, latent cytomegalovirus infection, and body mass index.
A recent study reveals that NK cells can memorize viral antigens and differentiate into immune memory NK cells with considerable killing ability. Themis2, a cytoplasmic protein, plays a crucial role in regulating this process.
Researchers at Trinity College Dublin discovered that autism-induced maternal immune response alters brain development and prevents infantile amnesia. Memories formed during infancy can be permanently reinstated through light-activated neural pathways in adults.
Researchers used dynamic total-body PET scans to visualize immune T cell distribution in recovering patients. The study found increased concentrations of CD8+ T cells in the bone marrow of recovering COVID patients compared to healthy controls.
A recent study published in the Journal of Clinical Investigation found that coronavirus vaccines build immune memory in various organs, including the liver, kidneys, and lungs. This local immune response is more effective than circulating antibodies in protecting against infection.
Researchers at the University of Missouri have identified a way to improve immunological memory produced by T cells in response to influenza infection, potentially leading to more effective vaccines and treatments. The study found that manipulating a molecular signaling pathway can strengthen and prolong the immune response.
Scientists have discovered that tissue-resident memory T cells can be enhanced to fight off infections and tumors by redirecting their cholesterol-making process. A drug and statins were found to boost coenzyme Q production in these cells, improving their effectiveness.
Researchers discovered that female mice were more susceptible to opportunistic infections when progesterone levels were high, but this vulnerability was reversed by progesterone blockers. This study's findings suggest a sex-based difference in immune training and may have implications for human immune function.
Researchers establish a direct link between Covid-19 and Alzheimer's disease, attributing the connection to RAS overactivation caused by SARS-CoV-2 virus. This dysfunction leads to increased b-amyloid protein accumulation, impairing brain cell synaptic connections and cognitive functions.
New research from Washington University School of Medicine reveals that updated booster shots targeting specific COVID-19 variants can elicit a broad antibody response capable of neutralizing new variants. Periodic boosters may be necessary to maintain population immunity as the virus continues to evolve.
Researchers analyzed how immunological memory gets generated and maintained to understand its role in cancer and inflammatory diseases. They found that increased inflammation can actually reduce immunological memory, highlighting the need for regulation.
A Northwestern University study found that as people age, their cerebrospinal fluid immune system becomes dysregulated, leading to cognitive impairment and neurodegeneration. The discovery provides a new clue to the process of neurodegeneration and may potentially be used to treat inflammation of the brain.
The Hackensack Meridian Center for Discovery and Innovation's CDI laboratory has identified critical regulators controlling T-cell homeostasis. The findings could lead to improved cancer therapies and vaccines of the future by modulating the human immune system.
A new study found that adults have stable immune memory to common cold coronaviruses, which could lead to similar protection against SARS-CoV-2. The findings suggest that COVID-19 booster shots may be critical for long-term immunity.
A study by researchers from the University of Chicago reveals that bacteria in donated organs complicate the immune response after transplantation. The findings show that immune responses against commensal bacteria add to the rejection of the organ, reducing the effectiveness of immunosuppressive drugs and causing damage to the graft.
A new study published in Cell compares the four types of COVID-19 vaccines and reveals that most people retain some immune response to SARS-CoV-2. The researchers found that immune memory may not prevent infection but helps fight severe disease.
Studies found people infected and vaccinated had similarly robust antibody responses against variants alpha through omicron; Immune memory cells against common cold coronaviruses may be markers of longer immunity. Researchers hope to improve vaccines with these insights.
Researchers discovered that memory B cells produce non-specific antibodies to combat virus mutants, working alongside phagocytes to screen for variants. This mechanism may offer protection against SARS-CoV2 and HIV variants, and could influence vaccine development.
A study published in Cell reveals that individuals with gum disease are more susceptible to developing arthritis due to alterations in immune cell precursors in the bone marrow. The researchers also found that this association may prompt a reconsideration of how bone marrow donors are selected.
Researchers at Temple University found that individuals with prior COVID-19 infection experienced rapid antibody production after the first vaccine dose, but showed little increase after the second dose. This contrasts with those without a history of infection, who exhibited massive responses after the second dose.
Researchers at Harvard's Wyss Institute create functional lymphoid follicles on a chip, replicating human immune responses and predicting vaccine efficacy. The discovery offers a new tool to model the complex choreography of human immune responses to infection and vaccination.
Researchers found that innate effector cells can acquire a memory to strengthen gut mucosal defenses against repeated infections over time. This discovery demonstrates a new antibacterial immune defense mechanism and could lead to novel therapeutic approaches to treat intestinal diseases.
Researchers found that interleukin-2 promotes the development of two subsets of CD8 T cells, one producing IL-2 and the other not, with distinct fates. The IL-2-producing cells develop into immune memory cells with long-term protection, while the non-IL-2-producing cells gain effector traits but lose memory formation.
A study has identified specific signaling pathways that determine when immune cells develop into long-lived protective T cells. The researchers found a distinct molecular signature of these memory cells, which helps to unravel the complex way in which immunological memory is formed and maintained.
A new study found that infection-fighting B cells retain better memory of the coronavirus spike protein in patients who recover from less-severe cases of COVID-19 than those recovering from severe cases. This hints at subtle differences in the quality of immune response based on COVID-19 severity.
Previous antibody responses to harmless coronaviruses contribute to SARS-CoV-2 immunity, reducing infection severity and hospitalization rates. Researchers found that people with strong immune responses to other human coronaviruses have some protection against SARS-CoV-2 infection.
A new study reveals that memory T helper cells can work with memory B cells to effectively defend the body against chronic viruses. This finding has direct relevance to developing new vaccines for HIV and hepatitis C, as it suggests a more sustained immune response.
A new study by Boston Children's Hospital researchers found that tissue-resident memory T cells in joints anchor themselves after a flare and wait for another trigger to react. Deleting these cells prevents arthritis flares from occurring, opening up new therapeutic avenues for rheumatoid arthritis treatment.
Researchers comprehensively review T-cell responses to respiratory viral infections and chronic obstructive pulmonary disease (COPD), highlighting key characteristics of peptide-reactive T-cells. The review aims to improve understanding of the underlying mechanisms, leading to more effective immune protection and treatment methods.
A new study from La Jolla Institute for Immunology shows that the Moderna COVID-19 vaccine generates durable T cell memory and antibodies, even in people over 70. The researchers found strong CD4+ and CD8+ T cell responses to the vaccine, comparable to those seen in recovered COVID-19 patients.
Researchers at Karolinska Institutet discovered that B cells choose between cell fates to balance acute and memory responses. This understanding could optimize vaccines against viruses or other pathogens.
CD8+ T cell priming in the spleen generates long-lived, stem-like memory T cells with enhanced ability to differentiate into T effector cells. Spleen-primed T cells have superior capacity to respond to rechallenge infection and expand into infection-fighting T effector cells.
Researchers found that prior exposure to common cold coronaviruses boosts the body's immune response to SARS-CoV-2, with cross-reactive T cells recognized by the immune system. The study's findings suggest a protective effect against severe disease and improved vaccine efficacy in younger individuals.
The article highlights the advantages of intranasal vaccination against SARS-CoV-2, including needle-free administration and elicitation of mucosal immunity in the respiratory tract. Researchers argue that this approach may be more effective than traditional intramuscular vaccinations, offering a broader range of protection.
Researchers have developed a new imaging technique that allows them to visualize immune T cells in three dimensions, revealing specialized niches that determine their function. The study identifies avenues for therapeutically targeting effector and memory cells, which could lead to improved vaccine strategies.
A new study found that COVID-19 survivors have immune cells necessary to fight re-infection, with virus-specific antibodies and memory B cells persisting in the bloodstream. This suggests that people may have protective immunity against serious disease for at least eight months after infection.
Researchers at Technical University of Munich found that memory T cells form earlier in the immune response than previously believed, contrary to current scientific opinion. This discovery has significant implications for vaccine development and could lead to improved vaccines with increased long-term effectiveness.
Researchers found that one third of human liver NK cells can remember viruses and respond specifically to them, making them an interesting target for prophylactic use in the fight against infections. This subset of NK cells exhibits a unique gene expression profile and could be used for specific vaccination strategies.
A new study has created a comprehensive map of how immune cells learn to fight infections and preserve memories of these encounters. The findings, published in Nature Immunology, could help scientists develop new vaccines and therapies for various diseases by targeting specific immune cells.
Scientists discovered a key transcription factor regulating T cell survival and immunological memory. Overexpressing this factor in CAR-T cells improved therapy efficiency for cancer treatments. Improved therapies could benefit patients with B cell lymphoma and other diseases.
Researchers at the University of Pittsburgh School of Medicine have made a groundbreaking discovery that could lead to a significant increase in long-term survival of transplanted organs. The study found that the innate immune system can specifically remember foreign cells, paving the way for new drugs that can prevent chronic rejection.
Researchers at RMIT University found that microglia cells can be activated to boost memory performance in rats by up to 50%, reversing damage caused by neuroinflammation. This discovery could lead to the development of new treatments for cognitive decline and dementia.
Researchers found that ART may not restore immune protection from childhood vaccinations and infections prior to HIV infection. This could leave patients susceptible to chronic diseases and inflammation, potentially shortening their lifespan.
A study by the Wellcome Sanger Institute and University of Amsterdam found that measles virus deletes part of the immune system's memory, removing immunity to other infections in humans and ferrets. This 'immunological amnesia' increases vulnerability to secondary diseases like flu, diphtheria, and tuberculosis.
Researchers discovered that a subset of natural killer cells with high Ly49H receptor levels expanded and remained detectable after the peak immune response, indicating a simple form of immunological memory. This finding could have significant implications for human NKs and their role in CMV infection.
Repeated exposure to anti-viral signaling molecules trains the innate immune system to react more efficiently. Fibroblasts exhibit faster and greater activation of anti-viral genes after subsequent stimulations, indicating specific memory in the innate immune system.
Researchers at MIT and Brigham and Women's Hospital discovered a novel mechanism for chronic rhinosinusitis, which involves distinct gene-expression patterns in epithelial cells. The study suggests that basal cells from patients with nasal polyps retain a memory of IL-4 and IL-13, immune response cytokines driving allergic inflammation.
Researchers found that the P2RX7 protein influences the body's long-term immune system and helps generate memory cells protecting against certain viruses and reinfection. Certain drugs used to control neuropathic chronic pain can cause these immune memory cells to decay, leaving individuals vulnerable to infections.
Two new studies presented at the Experimental Biology 2018 meeting found that consuming dark chocolate with a high concentration of cacao (minimally 70% cacao) has positive effects on stress levels, inflammation, mood, memory and immunity. The flavonoids in cacao are believed to support cognitive, endocrine and cardiovascular health.