A gene defect in Ro protein causes a lupus-like disorder by exposing defective ribonucleoproteins to the immune system, triggering autoantibody production. The study suggests that Ro normally plays a protective role by hiding defective complexes from the immune system.
Researchers discovered a novel way to defeat Gleevec-resistant cancer using a second drug that targets the tyrosine kinase enzyme. This proof-of-principle shows promise for treating patients with a range of cancers.
HHMI has awarded $10.4 million to Cold Spring Harbor Laboratory (CSHL) and $8.2 million to Marine Biological Laboratory (MBL) to support graduate courses spanning biological disciplines and computational sciences. The grants will support high-quality courses that significantly impact participants' careers.
Researchers found lower levels of metabolic activity in mitochondria of older people, underlying insulin resistance. Physical activity can enhance mitochondrial number in muscle through activation of AMP kinase.
Researchers have identified 46 new mutations in colon cancer genes that can be targeted by drugs, affecting approximately 30% of colorectal cancers. The study used a forward-looking approach to screen the genes that produce tyrosine kinases, resulting in the discovery of novel mutations that spur colon cancer.
Research reveals a mutant form of the muscle protein dysferlin prevents normal muscle repair in two muscular dystrophies, limb-girdle muscular dystrophy type 2B (LGMD2B) and Miyoshi Myopathy (MM). The discovery identifies a critical component in membrane-repair machinery, offering potential clues for future therapies.
Researchers have discovered the structure of voltage-dependent ion channels, crucial for nerve function and muscle contraction. The study reveals a novel mechanism that enables ions to flow through these channels, allowing for precise regulation of electrical impulses in the brain and heart.
Researchers have purified Wnt protein, a potent trigger of development and cell proliferation, to activate blood-forming stem cells. The discovery offers novel ways to enhance stem cells for cancer patients whose immune systems are compromised by chemotherapy.
The study reveals a vast array of genomic diversity among the ten newly isolated phages, with varying genome lengths and unexpected similarities to bacterial genomes. This discovery challenges traditional classification systems and raises questions about the role of bacteriophages in evolution.
Research suggests that exposure to constant white noise delays auditory organization in the brain of rats, which may have implications for human language development. The study found that the brains of noise-exposed rats took longer to develop and mature than those raised in normal conditions.
The study reveals how B cell lymphocytes assemble genes to encode specific classes of antibodies, including IgA, IgE, and IgG. The findings also explain the role of activation-induced cytidine deaminase (AID) in initiating gene specialization, a process crucial for the immune response.
A phase I clinical trial of cytotoxic T-lymphocyte-associated antigen 4 blockade therapy has shown promising results in boosting the immune system against cancer. The treatment enhanced the anti-tumor activity of certain vaccines and improved responses in patients with melanoma and ovarian cancer.
A computer-intensive mathematical model simulated mutation in flu genetic units, revealing a secondary, non-specific immune response that gives people temporary protection against nearly all variants. This understanding could inform the development of more effective vaccines offering longer-term immunity.
Studies of hypereosinophilic syndrome reveal a novel mechanism for generating a cancer-causing tyrosine kinase. Gleevec treatment leads to extraordinary responses in patients, including complete recovery from severe organ damage.
Scientists have discovered two signaling molecules, Wnt and noggin, that influence immature stem cells to form hair follicles. These findings may lead to new ways to promote or inhibit hair growth, as well as insights into the development of other tissues like teeth and lungs.
HIV-1 uses a unique 'glycan shield' mechanism to evade antibody attack, continuously changing large sugar molecules on its surface. This allows the virus to outsmart the immune system and escape elimination.
Researchers discovered that MHC proteins, including M10, play a crucial role in detecting and modulating pheromone activity in mice. The findings suggest that these proteins may act as escorts for pheromone receptors, allowing them to reach the surface of neurons where chemical reception takes place.
Researchers discovered a new gene mutation that affects L-DOPA production, potentially leading to new treatments for glaucoma. The study found that administering L-DOPA prevented severe abnormalities in mice with a genetic defect similar to primary congenital glaucoma.
Researchers have pinpointed a genetic defect in the phospholamban protein as the cause of inherited dilated cardiomyopathy. The discovery may lead to targeted treatment for this disorder, which affects 4.7 million Americans and costs $17.8 billion annually.
The study shows that pheromones trigger unique neural excitation patterns in the brain, providing vital information about sex discrimination and social behavior. Individual neurons respond to specific animals based on their genetic identity, suggesting a complex pheromonal system.
Researchers discovered two enzymes necessary for mice to process three basic tastes, challenging the long-held view that distinct machinery is needed. The study also found that restoring one enzyme can selectively restore specific taste modalities.
Researchers have identified an abnormality in the anchoring protein ankyrin-B as the cause of long QT syndrome, a rare and often fatal heart condition. The study found that disruption of this protein causes ion channels to function improperly, leading to abnormal heartbeats and cardiac arrhythmia.
Researchers found that the mahoganoid gene mutation causes neural damage similar to prion diseases, including loss of neurons and accumulation of astrocytes. The study suggests a link between protein metabolism defects and neurodegeneration in spongiform encephalopathies.
Researchers discovered that a mutated gene associated with early onset dystonia helps manage protein folding and is normally used as a quality control mechanism. TorsinA's failure to function correctly may lead to protein aggregation, causing neuron malfunction, which is linked to various movement disorders.
Researchers have discovered that the molecule melanopsin is necessary for the pupil to constrict properly in response to light. Melanopsin is part of a distinct light-sensing pathway that complements the primary visual pathway, and its loss affects the pupillary light reflex, which regulates sleep-wake cycles and hormone secretion.
Researchers used a new microscope technique to study how experiences rewire the brain. They found that synapses and spines on dendrites formed and disappeared daily, with some persisting for months.
A team of researchers at Columbia University identified a gene called Grp that inhibits the fear-learning circuitry in the brain. The discovery reveals that eliminating this protein's activity enhances learned fear and long-term potentiation, offering new insights into anxiety disorders and depression.
Researchers found that zebrafish can regenerate heart tissue with little or no scarring after a portion of the heart was removed. The study suggests that a competition between regeneration and scarring takes place in the zebrafish, with regeneration winning in most cases.
Researchers found that patients infected with one strain of HIV can develop superinfection with another strain, compromising treatment. Genetic analysis confirmed the presence of a second type of HIV in the patient's blood, indicating that superinfection is possible and poses unique challenges for vaccine development.
Scientists discovered that SNF5 is a tumor suppressor gene responsible for malignant rhabdoid tumors, a rare and aggressive childhood cancer. The study used a novel knockout technique to create mice with reversible, inverting conditional SNF5 genes, which developed cancers quickly.
Resistant strains of Staphylococcus aureus, also known as hospital staph, have become increasingly prevalent worldwide. Researchers have identified key differences in the structure of penicillin-binding protein 2A (PBP2a), which enables it to resist beta-lactam antibiotics.
Researchers discovered that ion channels in bacteria allow them to withstand stomach acid by enabling an electrical shunt. This finding suggests a similar mechanism exists in human cells, potentially related to maintaining acidic conditions within endosomes.
A study published in Science reveals a new risk factor for colon cancer, associated with the Bloom syndrome gene mutation. Researchers found that individuals carrying the mutated gene had nearly three times the risk of developing colon cancer compared to those without the mutation.
The HHMI Professors, 20 research scientists at 19 universities, will focus on engaging and effective approaches to undergraduate science education. They will develop new high-tech teaching tools, provide early research experiences, and mentor minorities to promote diversity in STEM fields.
Researchers have solved the structure of the pre-budding complex, a set of proteins that plays a key role in forming vesicles on the cell's endoplasmic reticulum. The study reveals how the complex assembles on the ER membrane and initiates the process of membrane cargo capture and vesicle budding.
A study by Nikola Pavletich and colleagues reveals that BRCA2 protein binds to damaged DNA, repairing it. This discovery sheds light on the mechanism of breast cancer development and opens new avenues for treatment strategies.
Researchers identified 216 'stemness' genes that are active in embryonic, neural, and hematopoietic stem cells. These genes are involved in coping with stress, signaling, and self-renewal, and can aid in developing techniques to induce stem cells to differentiate into specific adult cells.
Researchers at Howard Hughes Medical Institute found that a plant compound called cyclopamine effectively killed cultured mouse medulloblastoma cells and human tumors. The study showed promising results, with all seven tested human medulloblastomas responding dramatically to the treatment.
A study led by Mark T. Keating found that 13.2% of African-Americans carry an altered form of the SCN5A gene, linked to prolonged contraction of heart muscle cells and arrhythmia risk. The variant can be detected through simple tests, allowing for preventive measures such as avoiding certain medications and monitoring potassium levels.
Adult stem cells have intrinsic properties and respond differently to environmental signals, suggesting a new approach to repairing damaged PNS tissue without transplanting exogenous cells. The study reveals that matching the origin of the stem cell to the specific tissue being repaired is crucial for successful application.
Researchers have identified a toxin, glycosylphosphatidylinositol (GPI), that contributes to malaria's virulence and is now being explored for use in a vaccine. The anti-GPI vaccine has shown promise in mice, eliciting an antibody response and reducing immune reactions to the malaria parasite.
Researchers identified 15 BCR-ABL mutations that cause resistance to Gleevec, a common treatment for chronic myeloid leukemia. These mutations alter the enzyme's flexibility and conformation, making it difficult for the drug to bind and inhibit its activity.
Defects in enzymes responsible for processing dystroglycan protein cause several rare forms of muscular dystrophy. The discovery will help doctors diagnose and provide genetic counseling to patients. It also raises questions about links between muscle physiology and neurobiology, potentially improving understanding of learning and memory.
Researchers created a mouse model of Rett syndrome to study the gene MECP2 and its role in fine-tuning the developing nervous system. The study may improve understanding of the disorder and lead to potential treatments for patients.
Scientists have made a breakthrough in growing functioning motor neurons from embryonic stem cells, a crucial step towards regenerating nerve tissue lost to disease or trauma. The success of the experiments suggests that human motor neurons can be grown using the same approach.
Researchers discovered a compound that selectively inhibits the growth of breast cancer cells engineered to overexpress HER-2, a protein implicated in 20-30% of human breast cancers. The compound, F16, targets the mitochondria of cancer cells, causing them to swell and eventually rupture, leading to cell death.
A recent study identified stearoyl-CoA desaturase-1 (SCD-1) as a key enzyme involved in fat storage, specifically in the liver. Leptin, a hormone produced by fat tissue, represses SCD-1 levels, leading to decreased fat accumulation and increased energy expenditure.
The Howard Hughes Medical Institute has awarded $80 million to 28 universities in the US for initiatives aimed at enhancing undergraduate science education. These grants will provide resources to help universities improve their teaching programs, attract minority students to STEM fields, and foster interdisciplinary courses.
Researchers found that gene swapping in mice leads to pro-B cell lymphomas, with amplifications of c-myc and IgH genes arising from chromosome translocations. The study uncovered a new mechanism for cancer formation involving the DNA-snipping enzyme RAG.
Two new drugs, PKC412 and CT53518, have shown promising results in treating acute myeloid leukemia (AML), a deadly form of blood cancer. The drugs, which target the FLT3 receptor, have been effective in killing leukemia cells and prolonging survival in mouse models.