Articles tagged with T Lymphocytes
A newly discovered 'branding' process in immune system cells may help the immune system determine which infections to fight, potentially leading to new vaccine strategies. The discovery also sheds light on autoimmune conditions such as rheumatoid arthritis and type 1 diabetes.
Researchers discover distinct phase of rheumatoid arthritis immediately after symptom onset, enabling early treatment and potentially halting disease progression. The study proposes a new therapeutic window for potent anti-inflammatory therapies during the first few months of clinically apparent disease.
Researchers found that sera from lupus patients contain antibodies that bind to T cells and suppress IL-2 production through CaMKIV. This deficiency in IL-2 contributes to the autoantibody production seen in lupus, highlighting a new understanding of how microenvironment influences defective T cell function.
The level of signal-joint TRECs (sjTRECs) in the blood appears to directly reflect the ability of the transplant recipient's thymus gland to process donated stem cells. High levels of sjTRECs indicate a successful reconstitution of the T cell population, improving patient outcomes.
Researchers at VGTI found that aging mice have greater T cell clonal expansions, which are less effective in fighting disease. This leads to a reduced ability to fight off pathogens, making the immune system less diverse and capable.
Researchers at Wyeth determined the three-dimensional structure of PKCΘ, a key signaling molecule in T lymphocytes. This discovery has potential to identify selective inhibitors for autoimmune diseases by disabling T cell activation.
Researchers found that testosterone impairs T-lymphocyte function, leading to a weakened immune response in men. In contrast, females' immune systems are more active without significant levels of testosterone, making them more prone to autoimmune diseases.
The NIAID's Large-Scale Antibody and T Cell Epitope Discovery Program aims to deepen understanding of immune function against certain infectious agents. Researchers will discover new epitopes from various microbes, including those that could be used in bioterrorist attacks, to design improved medical countermeasures.
The Oregon Health & Science University will focus on tuberculosis research, using cells from TB patients with successful immune responses to create vaccines. The goal is to provide protection to others while over 2 million people die worldwide each year of TB.
Researchers found that Smad3 protein was present in B-cell and non-lymphocyte samples but almost absent in T-cell samples. In mice, deletion of the Smad3 gene impairs TGF-B's ability to stop T-cell proliferation. Further studies are needed to understand the mechanisms behind Smad3's absence in childhood T-cell leukemia.
The Guava EasyCD4 and EasyCD8 assays provide comparable accuracy to flow cytometry methods but are simpler and more affordable, enabling global access to affordable HIV/AIDS patient monitoring. These lower-cost alternatives can significantly improve quality of care and life for millions of HIV+ patients in resource-limited countries.
Researchers discover a new strategy to combat type 1 diabetes by blocking the interaction of RAE-1 with its immune receptor, NKG2D. The treatment has shown complete effectiveness in preventing diabetes development in mice and promises potential as an effective human treatment.
Researchers identify TAL1/SCL as a key player in T cell acute lymphoblastic leukemia (T-ALL), a cancer that affects 10%-15% of pediatric and 25% of adult patients. Disrupting TAL1/SCL's interaction with E47/HEB may offer new therapeutic avenues for these patients, who respond poorly to current chemotherapies.
Researchers studying epilepsy patients who underwent brain surgery on either side found that those with left-brain surgery experienced decreased immune function, while right-brain surgery boosted immune response. The findings raise concerns about protecting patients from infection following strokes or left-brain surgery.
Researchers found that patients taking prednisolone had significantly higher CD4+ T-cell counts after two years compared to those not taking the drug. After five years, over 10% of patients on prednisolone maintained high CD4+ T-cell counts.
Researchers discovered a protein, H2-DM, that helps distinguish between foreign and native proteins in the immune system. This distinction is crucial to prevent autoimmune conditions like diabetes, lupus, and arthritis.
Researchers at UT Southwestern discovered a cooperative relationship between CD44 and VLA-4 receptors on T-cells to facilitate their migration into infected tissues. This bimolecular complex is necessary for firm adhesion, allowing T-cells to initiate immune responses in diseases like rheumatoid arthritis.
Researchers explored the potential of 7-oxo DHEA to enhance T-cell function in human lymphocytes, a key component of the immune system. The supplement may play an important role in restoring immune function in elderly individuals, improving quality of life.
Researchers at Jefferson Medical College have found that the HIV virus produces proteins that trigger biochemical pathways in the brain, resulting in brain cell death and dementia. The study suggests that removing the virus or its associated proteins may be an effective way to prevent or treat HIV-related dementia.
Researchers at Mayo Clinic report that B cells and immunoglobulin help reconstitute immunity by promoting T cell development. The team found that administering gamma globulin or B cells can boost T cell numbers and diversity, potentially improving the immune response in patients with AIDS and other immunodeficiency diseases.
Scientists have created a system to identify specific protein fragments bound to T cells, allowing researchers to better understand the immune system's attack on foreign invaders. The breakthrough could lead to major advancements in preventing and treating autoimmune diseases like rheumatoid arthritis.
A new gene-expression-based predictor algorithm has been developed to predict prostate cancer recurrence with high accuracy, utilizing molecular signatures that distinguish subgroups of patients with different disease outcomes. The algorithm correctly classified 88% of patients with poor prognosis into the correct group.
A recent study by Mark Feinberg and colleagues reveals that the level of immune activation directly affects the initial peak of virus in the blood stream. The researchers also found that steady-state viral levels in chronic infection are related to the generation of a primary immune response, which may be both helpful and harmful.
A Northwestern University study found that COX-2 inhibitors can block lupus autoimmunity by targeting a specific molecular pathway. The researchers identified structural peculiarity in some COX-2 inhibitors as the key to their effectiveness, which may lead to the development of new treatments.
Researchers found damaged T cells arose from a particular cell lineage in tumor environments, leading to immune dysfunction. Targeting novel properties can prevent or reverse the defects, providing new insights into the relationship between tumors and defective T cells.
A study on therapeutic cloning of hematopoietic stem cells showed promising results in generating compatible cells for long-term engraftment. Another study on transferring donor immunity across HLA barriers identified a safe and effective way to re-build immunity after bone marrow transplantation.
A recent study found that levels of newly produced CD8+ T lymphocytes, known as recent thymic emigrant (RTE) CD8+ T cells, are crucial in determining age-dependent mortality and outcome in brain tumor patients. High RTE CD8+ T cell levels were associated with improved patient response to immune therapy.
Researchers develop antibodies that block CXCL-10 cells from recruiting T-cells, reducing spinal damage and improving mobility in rats with induced spinal cord injuries. This finding offers hope for recovery for those suffering from spinal cord injuries.
Researchers developed gene therapy using dendritic cells pulsed with TRAIL to inhibit collagen-induced arthritis. The treatment reduced T cell infiltration and inflammation, suggesting a safe and effective method for inhibiting arthritis development.
Researchers identified a bull's eye-shaped structure between white blood cells that enhances sensitivity to antigens but cuts off signaling beyond a threshold, preventing T-cell death. This adaptive control device enables the immune system to respond to signs of infection over a wide range of magnitudes.
Researchers discover that the immune synapse theory suggests the synapse is linked to both activating and deactivating T cells, with its ability to amplify signals also shutting down messages in later stages. The findings confirm key concepts in the immune synapse theory.
Researchers used a gene gun to target dendritic cells, the 'security cameras' of the immune system, and found that their number is 100 times higher than previously thought. This discovery could lead to more efficient vaccine development using abundant, long-lived dendritic cells.
A randomized, controlled study involving medical marijuana found no harmful changes in HIV virus levels or immune system function in patients with HIV. Participants experienced weight gain, but no change in their undetectable status.
Researchers have identified a small subset of dendritic cells that can suppress T-cell responses, potentially treating tumors and autoimmune diseases. Experimental immunosuppressive agents are being explored for their ability to target this subset, offering new hope for patients with transplanted organs and autoimmune conditions.
Researchers at Duke University Medical Center have successfully treated seven out of 12 children with complete DiGeorge Syndrome using a thymus transplant procedure. The transplants enabled the children's bodies to form new immune systems, leading to improved survival rates and reduced infections.
A new study published in Nature Medicine has found that certain human genes can predict the progression rate of AIDS in infected individuals. The researchers analyzed data from a large group of homosexual men with HIV and found that those with specific HLA protein types were more likely to succumb to the disease quickly.
A new study found that antibodies in female mice attached to their babies' cells stimulate a T-cell response, leading to ovarian destruction and inflammation. The researchers suggest that exposure to the mother's antibody during critical periods of development is crucial for avoiding autoimmune disease.
Researchers documented how HIV enters human T cells, where it multiplies and subverts the immune system, using time-lapse microscopy. The study reveals that HIV exploits the dendritic cell's special relationship with T cells to gain entry and launch its assault.
Researchers at WashU Medicine discovered a novel molecule that plays a critical role in gut immunology and interacts with mucosal-associated invariant T cells. The findings suggest that this molecule may be involved in various diseases of the gut, particularly those related to intestinal microorganisms.
Scientists at Imperial College London have discovered a unique method of viral transmission by the HTLV-1 leukaemia virus. The virus infects cells and transfers itself to other cells without releasing particles, evading the immune system and paving the way for potential new treatments.
Researchers at Memorial Sloan-Kettering Cancer Center successfully eradicated cancer in mice using targeted immunotherapy with engineered human T cells. The study, published in Nature Medicine, demonstrates the first-in-vivo efficacy of adoptive immunotherapy with engineered human T cells in mice.
Researchers at Dana-Farber Cancer Institute identified a gene signature that distinguishes leukemia patients who can be cured with intensive chemotherapy from those who require bone marrow transplantation. Patients with high HOX11 expression survived for three years and were most likely cured, while those without it had poorer outcomes.
OHSU researchers identified a critical role of major histocompatibility complex (MHC) molecules in training T-cells to combat infections. The discovery may lead to the development of more effective vaccines and immune system boosting strategies for susceptible populations, such as the elderly.
The study reveals the role of Map in promoting S. aureus persistence and survival in infected mice by interfering with T cell function. Researchers warn that the increasing prevalence of multidrug-resistant strains poses a significant threat to public health.
A clinical trial using lab-grown T cell clones has shown promise in shrinking melanoma tumors. In the study, five patients saw their tumors stop growing for up to a year, while three experienced tumor shrinkage.
A new study links ß-defensin 2 to the adaptive immune response, which combats pathogens that evade innate defense mechanisms. Researchers hope to incorporate ß-defensin 2 into cancer vaccines to promote tumor-destroying cell growth and improve patient response.
Researchers induce leukemia cells to change behavior and stimulate immune system, killing significant numbers of leukemia cells in a 3-step process. The approach has shown strong killing effect against AML cell lines but not other types of cancer, with potential for safe transfer back into patients.
A UCSF study found that macrophages from human lymphoma patients can cause mouse lymphoma when injected into mice. This contradicts the current understanding of macrophages' role in fighting disease. The researchers believe HIV-infected macrophages can become neoplastic and stimulate lymphoma growth.
A new therapy boosts the immune system's targeted assault on tumors, shrinking melanoma in human patients. The approach involved suppressing the patients' immune systems to make room for new cells that attacked and killed tumor cells.
A new genetically engineered mouse model shows how pieces of captured germs are carried to the surface of dendritic cells via long tubules. This process improves the efficiency of the immune response by alerting T cells to kill invading germs.
Researchers at Ohio State University have developed a peptide treatment that inhibits experimental autoimmune encephalomyelitis (EAE) and suppresses the onset of multiple sclerosis-like symptoms. The treatment targets T cells by binding to CD80, preventing their activation and expansion in disease.
A new study suggests that growth hormone therapy can significantly enhance human thymic function and increase the production of new T cells in HIV-infected patients. This could potentially help preserve and restore their immune systems. However, more research is needed to confirm these findings and ensure the benefits outweigh the risks.
Researchers at Scripps Research Institute suggest administering an injection of fresh T cells after chemotherapy or irradiation to increase anti-tumor effect. This approach could potentially reduce collateral damage and improve treatment outcomes for various cancers.
The LAT protein is essential for T-cell activation and a normal immune response. Mutations in the protein can lead to unbalanced signaling pathways, potentially causing autoimmune disorders.
Researchers found that naltrexone increased the antiviral activity of AZT and indinavir when added to cell cultures containing these drugs. Naltrexone targets infected cells rather than the virus itself, a novel approach to HIV treatment.
Researchers analyzed muscle biopsies from patients with polymyositis and sarcoid myopathy to identify key cell surface receptors involved in T-cell adhesion and migration. The study used MelTec's MELK technology to map protein networks in whole, intact cells, providing new insights into disease mechanisms.
A new type of dendritic cell has been found to prevent diabetes in mice by causing T cells to die rapidly. In a study, researchers treated mice with this special dendritic cell and found that half remained diabetes-free at one year.
Researchers discovered two mechanisms by which adenoviruses establish persistent infections: interfering with apoptosis signaling and preventing apoptosis through the Receptor Internalization and Degradation complex. This knowledge could improve the usefulness of adenovirus vectors in gene therapy.
Dr. Pandelakis Koni has developed an animal model to study autoimmune diseases, including multiple sclerosis and type 1 diabetes, by selectively stopping the immune response. The mouse model allows researchers to understand how dendritic cells trigger the immune system and develop strategies to prevent autoimmunity.
Researchers have developed a mouse model to study the transmission of cell-associated HIV in women, finding that hormonal treatments and agents disrupting lipid rafts can prevent infection. The study reveals the importance of understanding cell-associated HIV transmission for developing effective prevention strategies.