Articles tagged with Mutation
Scientists have developed a new gene technique to find disease-causing mutations in patients with brain malformations. The technique uses next-generation sequencing technology to sequence hundreds of copies of genes in a panel of candidate genes, identifying somatic mutations that were previously undetectable.
A new deep sequencing approach has identified subtle somatic mutations in patients with brain disorders, revealing previously missed genetic causes. The technique complements whole-genome and whole-exome sequencing, enabling the detection of mutations in as few as 10% of patients' blood cells.
Researchers developed small-molecule drug candidates that interfere with the synthesis of an abnormal protein, playing a key role in both diseases. The study also discovered biomarkers to test the efficacy of these therapies and found toxic proteins in spinal fluid that could become an enrollment tool in human clinical trials.
Researchers have made significant breakthroughs in understanding the relationship between genetic changes and disease causation using next-generation sequencing technology. Subtle gene changes are now being associated with unique disease presentations, even in previously undiagnosed forms of disease.
Researchers have found an alternative way to model cancer using CRISPR, a gene-editing system that can introduce cancer-causing mutations into the livers of adult mice. This method enables scientists to screen these mutations much more quickly than traditional breeding methods.
A team of scientists has found that genetic changes in a bacterial pathogen may be caused by chance environmental events rather than genetic mutations. The study, published in PNAS, analyzed 149 genomes of Salmonella enterica serovar Paratyphi A and found that the pathogen had not changed dramatically over its 450-year history.
Researchers identified a gene mutation associated with short sleep duration and resistance to sleep deprivation in humans. The BHLHE41 variant allowed some adults to function normally on less than six hours of sleep per night.
A new study found that obese individuals with a specific genetic mutation have similar brain activity when shown appetizing foods, whereas overweight individuals without the mutation showed lower response levels. This suggests a link between the MC4R pathway and food cravings.
Researchers funded by NIH found that common gene variants account for most genetic risk for autism, outweighing other factors. The study used a large Swedish sample and new statistical methods to detect common genetic variation associated with risk.
Researchers have identified a genetic link between the CHD8 mutation and autism, affecting approximately half of those with the condition. The study found that individuals with this mutation often exhibit gastrointestinal disorders, sleep disturbances, and distinctive physical characteristics.
A study has identified a genetic mutation that may cause parkinsonism in young people, particularly those with Attention Deficit Hyperactivity Disorder (ADHD). The mutation affects the brain's transport of dopamine, leading to movement disorders and mental health issues.
Researchers identified an epigenetic signature in blood samples from women with a BRCA1 mutation that increased cancer risk and lower survival rates. The same signature was found in women without the mutation who developed breast cancer, indicating it may predict breast cancer risk several years before diagnosis.
A mitochondrial gene defect in the citrate carrier SLC25A1 may underlie deficits in neuromuscular transmission. Investigators identified a homozygous mutation in this gene in two siblings with congenital myasthenic syndrome, characterized by muscle weakness and fatigability.
Researchers at Scripps Florida have discovered how a specific genetic mutation damages the developing brain, leading to intellectual disability. The study suggests new possibilities for therapeutic intervention and highlights potential biomarkers for cognitive failure.
A significant genetic component of Idiopathic Generalized Epilepsy (IGE) has been discovered, implicating a mutation in the gene for protein cotransporter KCC2. The study found a clear association between two variants of KCC2 and severe IGE in French-Canadian patients.
Researchers discovered a novel drug combination that targets BCL2 protein mutations in follicular lymphoma, a type of non-Hodgkin lymphoma. The study's findings suggest that this combination therapy is safe and effective against mouse models of the disease.
Researchers at Duke University Medical Center have identified a genetic mutation in PPM1D that contributes to the growth and death of tumor cells in brainstem glioma. This mutation may render radiation therapy ineffective, providing immediate clinical benefits and paving the way for new drug development.
A new software tool, pVAAST, has been developed to identify genetic mutations that contribute to an individual's increased risk of developing complex diseases. The tool combines two statistical methods, linkage analysis and association tests, to find disease-causing gene mutations more efficiently.
A new species of cavefish, Amblyopsis hoosieri, has been discovered in southern Indiana and is the first new species described from the US in 40 years. It lacks eyes and vision but maintains a functional rhodopsin gene to navigate dark waters.
The Phase 3 trial demonstrated positive trends in lung function, as measured by relative change in % predicted FEV1, with a 2.5% average difference between ataluren and placebo in favor of ataluren. Additionally, there were 23% fewer pulmonary exacerbations in the ataluren group compared to placebo.
Researchers sequenced blood and brain samples from a 115-year-old supercentenarian to identify somatic mutations. They found approximately 450 somatic mutations in white blood cells, with most being single nucleotide variants, which did not affect genetic fitness.
Researchers identified a previously unknown neurodegenerative disorder caused by a single mutation in the CLP1 gene, found in individuals born during the Ottoman Empire. The study suggests that consanguineous marriages in Turkey contribute to the high prevalence of rare genetic disorders.
A new genetic brain disorder has been discovered in humans, caused by a mutation in the CLP1 gene. The disorder affects the human nervous system and is characterized by reduced brain size, sensory and motor defects, and neuronal death.
Scientists discovered over 400 genetic mutations in the white blood cells of a 115-year-old woman, indicating that these mutations may not contribute to disease. The study also found extremely short telomeres in the blood cells, suggesting 'stem cell exhaustion' as a possible cause of death at extreme ages.
Researchers at UC Davis identified an association between the progressive neurodegenerative disorder fragile X-associated tremor/ataxia syndrome (FXTAS) and the formation of R-loops, which may be associated with the disorder's neurological symptoms. The study suggests that R-loops could be potential targets for drug development.
A study by researchers at Stanford University found that gene panels can help identify clinically actionable mutations in women with a personal or family history of breast or ovarian cancer. The technique, which focuses on a few select genes, is quicker, easier and cheaper than whole-genome sequencing.
Researchers at EPFL have developed a tool to identify mutations that make the flu virus resistant to Tamiflu. By analyzing the genetic code of the virus, they discovered new mutations that may render the current treatment ineffective, highlighting the need for further investigation.
Researchers have discovered that specific genetic mutations can increase the risk of melanoma by deactivating a gene that protects chromosomes from damage. This finding has significant implications for early detection and treatment strategies.
A faster and cheaper DNA sequencing technique, NGS, will improve care for patients with breast cancer by providing genetic mutation results before treatment begins. This may lead to more women opting for mastectomy instead of breast-conserving surgery, highlighting the need for close monitoring of at-risk patients.
A recent study reveals that the genetic disease ARVC is more widespread than initially assumed, with all known affected families sharing a common genetic origin. The mutation was first identified in Canada and has since been found in European countries including Germany, Denmark, and the USA, indicating a shared European heritage.
Researchers have found that rapid neuronal damage occurs 10-20 years before symptoms of inherited Alzheimer's disease appear, providing a crucial window for intervention. A clinical trial is underway to test the safety and efficacy of experimental drugs in this population.
Researchers found that a hexanucleotide repeat expansion in the C9orf72 gene creates G-quadruplexes, hairpins, and bulges that disrupt RNA function, leading to toxic RNA buildup and protein misfolding.
Researchers found that the C9orf72 mutation alters DNA shape, leading to cell death and abnormal protein processing. The mutation also affects nucleolin, a key protein involved in stress response, causing cells to become stressed and die.
A team of researchers has identified genetic mutations causing uncontrolled cortisol production, leading to weight gain, muscle wasting and other symptoms. The discovery may lead to new diagnostic tools and treatment approaches for Cushing's syndrome, a heritable condition.
Researchers have found a way to efficiently edit the human genome one letter at a time, boosting ability to model human disease and paving the way for therapies that fix genetic 'bugs'. The new technique highlights out-of-the-box thinking critical for scientific success.
A genetic mutation affecting a horse's gait has been found to be spread across the world, with highest frequency in Latin American breeds like the Paso Fino. The 'gait keeper' mutation, influenced by human selection, provides a smooth ride and minimal vertical movement.
Researchers found that malignant astrocytoma patients with the IDH1 mutation benefit greatly from surgical removal of as much tumor tissue as possible. This approach significantly improves survival, with average patient survival rates of 13.5 years for those with mutant tumors compared to less than 1.5 years for non-mutant tumors.
A genetically engineered mouse model has demonstrated the potent oncogenic role of mutant IDH2 protein in acute myeloid leukemia. The study provides a new tool for evaluating the pharmacological efficacy of potential mutant IDH2 inhibitors and confirms the relevance of this protein as a therapeutic target.
Two studies analyzed exomes of people with schizophrenia and healthy individuals, identifying patterns that suggest the disorder arises from combined effects of many genes. Genetic alterations tend to cluster in networks related to synaptic function, including calcium ion channels and cytoskeletal proteins.
A new study estimates that one in five women with ovarian cancer has an inherited genetic mutation that increases their risk of developing the disease. The research identified 222 inherited genetic variants associated with ovarian cancer, including major changes in genes critical for DNA repair and cell division.
Scientists at Rensselaer Polytechnic Institute discovered the structural effects of V44M and V44A genetic mutations linked to FAD. The mutations lead to increased production of toxic Amyloid Beta 42 peptide, driving memory failure in patients.
Researchers discovered a mutation in the TMEM95 gene causes idiopathic male subfertility in cattle. The study found that genetic defects can be traced back to one Fleckvieh animal born in 1966, which also highlights potential human medicine applications.
Research by the University of Exeter Medical School reveals two new genetic causes of neonatal diabetes, providing insights into how insulin-producing beta cells are formed in the pancreas. This discovery increases the number of known genetic causes of neonatal diabetes, offering hope for improved treatment and potential therapies.
A genetic mutation affecting fertility and milk yield in dairy cattle has been discovered by scientists. The deletion has a positive effect on milk production but causes embryo mortality, explaining the negative correlation between fertility and milk yield.
Researchers from Curtin University found natural radioactivity in DNA can alter molecular structures, creating new molecules that do not belong to the four-letter alphabet of DNA. This could lead to genetic mutations by confusing DNA replication mechanisms.
Researchers identify novel genetic mutations in the CALR gene that are common in patients with myeloproliferative neoplasms, improving diagnosis and treatment decisions. The study also explores the use of lenalidomide and idelalisib to strengthen rituximab treatment for pre-treated patients.
A study led by UCSF scientists pinpointed the disruption of a single cell type in the prefrontal cortex during fetal development as a significant factor in autism emergence. The finding suggests that though hundreds of genes contribute to autism, the underlying biological mechanisms will be far fewer.
Researchers found that plants with semi-dwarfism in wild Arabidopsis species have a mutated GA20ox1 allele, similar to those in rice and barley varieties bred for high yields. The mutation alters the gibberellin biosynthesis pathway, but other genes compensate for its effects.
Dartmouth researcher Scott Williams found that a person can have multiple DNA mutations in different parts of their body, resulting in varying genotypes. These discoveries challenge traditional views on human uniqueness and may impact forensic analysis, paternity testing, and genetic screening.
A recent study identifies a genetic root to childhood obesity, revealing that patients with mutations in the KSR2 gene have an increased appetite and slower metabolism. The findings suggest that drugs like metformin could provide new treatment options for obesity and type-2 diabetes.
Researchers at KU Leuven developed eXtasy software that uses advanced AI to analyze genetic data and identify disease-causing mutations. The breakthrough promises faster and more accurate diagnoses for millions of people with hereditary diseases.
A study published in Nature Communications reveals that evolution can favor mutations making avian flu more transmissible in mammals. The research found that even rare mutants can be transmitted if they have an evolutionary advantage, highlighting the potential for H5N1 viruses to infect humans.
Scientists at the University of Cambridge have identified a rare genetic mutation that causes severe respiratory infections and lung damage. The researchers believe that existing leukemia drugs may also be effective in treating this debilitating disease, which they are calling Activated PI3K-δ Syndrome.
A new study from the University of Southern California has found that a genetic mutation associated with Alzheimer's disease can double the rate of brain tissue loss. This means that individuals carrying this mutation may experience symptoms earlier than expected, highlighting the need for targeted clinical studies and treatments.
Researchers at Bascom Palmer Eye Institute have discovered a key marker in blood and urine that can identify people who carry genetic mutations causing retinitis pigmentosa, a blinding disease. The test is non-invasive and easy to perform, especially for young children.
Genetic mutations in two families with eating disorders were found to be linked to decreased estrogen-related receptor alpha and histone deacetylase 4 activity, increasing the risk of developing an eating disorder. CHST3 mutations also led to early-onset lumbar disc degeneration.
Researchers identify genetic mutations in two families with eating disorders, correlated with reduced estrogen-related receptor alpha activity. Mutations also reduce expression of known ERRSA-dependent genes, increasing risk of developing eating disorders.
Researchers identified a mutation in the carbohydrate sulfotransferase 3 gene associated with early-onset lumbar disc degeneration. Decreased CHST3 expression was found to predict LDD development, providing new insights into the genetic causes of this condition.
A new mutation in the ITGA10 gene has been identified as a cause of dwarfism in two dog breeds, Norwegian Elkhounds and Karelian Bear Dogs. The study reveals that the mutation affects bone growth and can lead to skeletal abnormalities.
Researchers propose a new approach called network-based stratification to identify cancer subtypes based on shared genetic networks. This method has immediate clinical value and can help clinicians better match treatment to individual patients, leading to more effective therapies.