Articles tagged with Mutation
Researchers at Duke University Medical Center have discovered a rare genetic mutation in sheep that causes large, muscular bottoms without excess fat. The 'callipyge' gene is imprinted, meaning it's only active in the offspring of the affected parent, and its discovery could illuminate how muscle and fat are deposited in humans.
Smithies' groundbreaking work on gene targeting has led to thousands of mouse models simulating human diseases, enabling rapid advances in diagnosis and treatment. His research using genetically altered mice has also shed light on high blood pressure, a major human problem.
Researchers Aviv Bergman and Mark Siegal found that complexity of genotypes, rather than natural selection, provides fidelity in development. They argue that functional genetic networks with enough complexity exhibit built-in property of fidelity, unaffected by environmental disturbances or natural selection.
A genetic mutation in the NOG gene causes autosomal dominant stapes ankylosis, a rare hearing loss syndrome with similar symptoms to otosclerosis. The syndrome is characterized by skeletal abnormalities and may require different treatment options.
Researchers found that genetic variations in HIV-A and HIV-C proteases make it harder for antiviral drugs to work. The study's findings have negative implications for long-term efficacy of therapies in patients infected with African subtypes.
Breast cancer researchers found that registry data accuracy is higher for hospital-based services than ambulatory services, suggesting registries can improve cancer care quality. Additionally, a study suggests blocking growth factor receptors may suppress regional metastases but not distant lung metastases.
A study of 271 patients with pheochromocytomas found that 24% carried one or more genetic mutations, including those in the VHL and RET genes. These mutations were associated with earlier symptom onset, multiple tumors, and specific tumor profiles.
Researchers have identified a specific DNA flanking region that triggers genetic instability in trinucleotide repeat disorders. This finding opens up new therapeutic targets for treating or preventing these diseases, which affect the nervous system and cause conditions such as muscular dystrophy and Fragile X syndrome.
A $1 million NIH grant will support Wilfredo Colón's study of familial ALS, a hereditary version of the disease. The research focuses on SOD1 enzyme mutants that lead to the disease's progression.
A team of UCLA and Finnish scientists has identified a genetic mutation outside the lactose intolerance gene, found in 196 adults from African, Asian, and European descent. The researchers believe this variant is the original form of the gene that mutated to tolerate milk products when humans adopted dairy farming.
Researchers found that genetic mutations in people with chronic pancreas inflammation are associated with an increased risk of pancreatitis. The study identified specific mutations in the CF and PSTI genes, which can lead to a 900-fold increase in pancreatitis risk for those with two mutations.
Researchers identified a specific mutation in the presenilin 1 gene that increases beta amyloid expression, a hallmark of Alzheimer's disease. The study found 18 unrelated families with the same mutation, suggesting a common ancestral origin.
The study provides strong evidence that several genes influence the development of late-onset Parkinson's and that age at onset and response to levodopa may be useful discriminators for genetic origins. Researchers detected evidence for genetic linkage to five distinct regions on chromosomes 5, 6, 8, 9, and 17.
Scientists have identified an important parallel between C. elegans and human NMD pathways, revealing a potential therapeutic strategy for masking genetic mutations. Inactivation of the human homolog of the C. elegans smg-1 gene inhibits NMD, allowing truncated proteins to accumulate and potentially compensate for genetic disorders.
Researchers pinpointed the gene on chromosome 3 that causes myotonic muscular dystrophy Type 2 (DM2), a complex disease affecting multiple systems. The discovery allows for the immediate development of a genetic test and paves the way for a more complete understanding and treatment of this form of muscular dystrophy.
Researchers from Vanderbilt University have discovered that the genes bozozok (boz) and chordino (din) cooperate to limit BMP activity during embryological development, allowing for the formation of the head and trunk. This discovery highlights a simple mechanism underlying vertebrate head and trunk specification.
Scientists at Johns Hopkins find that people with repeated sinus infections may carry a mutated CFTR gene, which could increase their risk of chronic sinusitis. The study suggests that patients carrying this mutation may benefit from targeted treatments for sinus infections.
A University of California, Berkeley scientist challenges the central tenet of cancer research that genetic mutations drive cancer. Instead, he proposes that aneuploidy, chromosomal duplication, is the primary cause of cancer. Experimental evidence supports this theory, showing cancer cells exhibit massive protein expression changes.
A strain of mutant flies with a crippled light-reactive pigment maintains a steady clock under constant light. The fly cryptochrome dCRY is the only photoreceptor molecule regulating the fly's circadian rhythm.
The University of North Carolina at Chapel Hill has been selected as one of two Regional Mutant Mouse Resource Centers by the National Institutes of Health. This grant will enable the expansion of Jackson Laboratories' capabilities to characterize, maintain, and distribute mutant mouse models to the research community. The new center w...
Researchers in Taiwan discovered a rare individual with two copies of the genetic mutation that protects against alcoholism. This finding challenges the long-held assumption that individuals with this mutation are immune to developing alcohol disorders.
A study published in Molecular Cell reveals that the mutated tumor suppressor gene ARF prevents cellular transformation by blocking p53 degradation, allowing it to stop tumor cell growth. Researchers found that mutations in ARF's Exon 2 are linked to cancer, impairing its ability to localize and block p53 export.
Geneticists at Duke University have discovered the functional interaction between myc and ras, two cancer-related genes. The study found that mutated ras causes myc protein to accumulate in cells, enhancing its growth-promoting abilities.
Researchers have developed a method to breed flightless Asian ladybirds that can control pests on crops like cucumbers and melons. The new biological pest-control strategy has shown promising results in reducing pesticide use, but further field trials are needed to assess its efficiency.
Researchers identify three key genes, swirl, somitabun, and snailhouse, that control dorsoventral patterning in zebrafish embryos. The study reveals a new understanding of the biochemical pathways involved in embryonic development, shedding light on birth defects in humans.
Researchers at the University of Colorado Boulder have created transgenic mice with gene mutations for hypertrophic cardiomyopathy, a genetic disease that thickens the heart muscle and obstructs blood flow. The study may lead to new therapeutic agents to improve heart function in humans.
A recent study found that a genetic mutation in the CCR5 gene does not fully explain why some people infected with HIV remain healthy for years. Instead, researchers attribute their good health to various factors, including immune system components and viral factors. The investigation involved 33 patients from different cohorts and rev...
Sexual reproduction in brewer's yeast found to be better at removing harmful genetic mutations than single-sexed populations. This could explain why humans and other vertebrates evolved to have two parents instead of cloning themselves.