Articles tagged with Human Genetics
A new genetic study reveals that head and body lice are the same species, despite their distinct characteristics. The research compared protein-coding genes expressed during both life cycles, finding only minor differences in sequences.
Human embryonic stem cells are regulated by three genes: Nanog, Oct 4, and Sox 2. These genes control self-renewal and differentiation, essential for treating diseases like Parkinson's and Alzheimer's. The study highlights the importance of human research over mouse models.
A new vaccine developed by Inserm researchers reduces both hypersensitivity to allergens and inflammatory response in asthmatic mice. The vaccine is based on DNA sequences of the allergenic substance Derf1 and has shown promising results in animal studies.
Scientists at Gladstone Institutes discover apoE protein plays distinct roles in young and aging brains, suggesting new research avenues for treating Alzheimer's. Increased ApoE levels can damage brains later in life, challenging current thinking.
A recent study by McGill University researchers has identified a key gene affecting chronic pain sensitivity, offering a potential new approach to individualized therapy. The findings suggest that targeting the pore-forming function of P2X7 receptors may provide relief for patients with genetically inherited low pain sensitivity.
A study of ancient DNA found that Western European Neandertals experienced a demographic crisis, leading to reduced genetic variation and near-extinction. This discovery challenges the long-held theory of cold adaptation in Neandertals.
Researchers found that the absence of a single gene in Neospora makes it less able to evade the immune response in mice and other species. This may explain why Neospora has a limited host range compared to Toxoplasma, which has more surface proteins necessary for host adaptation.
A multinational team of researchers found that house mice (M. m. domesticus) colonized Iceland and Greenland during the Viking age, mirroring human settlement patterns. The analysis of mouse mitochondrial DNA showed no evidence of mice in Newfoundland, suggesting a fleeting presence.
Researchers found that sex-deprived fruit flies prefer alcohol to satisfy a physical reward, which could lead to understanding of human addiction causes. The study's findings could also inform the development of treatments for substance abuse in humans.
Researchers have created a genetic map of recombination in chimpanzees, showing that hotspots differ significantly from those in humans. The study reveals the complex evolution of this process, which drives genetic diversity and adaptation.
A recent study by the Norwegian Institute of Public Health found that silver nanoparticles can suppress cellular growth and multiplication, causing cell death depending on concentration and duration of exposure. Titanium dioxide nanoparticles also caused DNA damage but with weaker effects.
A study by University of Illinois professor Gene Robinson found that honey bees differ in their desire to perform tasks, with certain individuals more likely to seek adventure. The research suggests that these differences may be due to variability in personalities.
A new JDRF-funded study identifies genes expressed in beta cells, suggesting a role in their own destruction leading to T1D. The research may help explain why the immune system specifically attacks beta cells, opening up new avenues for understanding and treating the disease.
The study compares the genomes of humans, chimpanzees, gorillas, and orang-utans, shedding light on human origins and genetic differences. Genetic changes important in evolution were found to be accelerated in genes related to sensory perception, hearing, and brain development.
Researchers found that bright light inhibits the firing of hydras' stinging cells, suggesting a daily rhythmic cue to regulate their behavior. The study links photoreception genes to the mechanism of hydra's harpoon-like cnidocytes, revealing unexpected functions beyond vision.
A team of researchers at the University of Gothenburg has identified a key molecule, Cdk1, responsible for initiating the maturation of mammalian eggs. This discovery could lead to an increased rate of successful IVF treatments for women struggling with egg maturation issues.
Researchers at UC Davis found that R-loops prevent methylation at CG island promoters, which are essential for 60% of human genes. This breakthrough could lead to treatments for autoimmune diseases by reversing cytosine methylation.
Most European Neandertals were on the verge of extinction around 50,000 years ago, according to a new study published in Molecular Biology and Evolution. A small group of Neandertals recolonized central and western Europe after dying off, surviving for another 10,000 years before modern humans entered the scene.
Biologists at the University of Rochester used a genetic tool from jewel wasps to find changes in cell regulator genes that affect wing growth. This discovery could help understand cell growth regulation and underlying causes of some diseases.
A team of Whitehead Institute scientists confirms that the human Y chromosome has not lost a single ancestral gene in the past 25 million years. The study, published in Nature, contradicts the 'rotting Y' theory and suggests the Y chromosome has been genetically stable since its divergence from other chromosomes 25 million years ago.
MDC researchers have identified a crucial function of the c-Maf gene in the development of neurons responsible for mechanosensory function. In mice with deleted c-Maf, high-frequency vibrations are not detected, leading to impaired touch sensation and early-onset cataracts.
Dr. Chris Overall's research has led to a better understanding of the human proteome, revealing key proteins controlling innate immunity and inflammation. His team discovered a molecular beacon that directs white blood cells to injury sites, stopping chronic inflammation.
Researchers have developed the Collaborative Cross, a reference manual of genetic variation in hundreds of specially-bred mice and their genetic sequences, which more closely mirror human genetic complexity. This resource could aid development of more effective treatments for various human diseases.
A team of scientists developed the Drosophila Genetic Reference Panel to study complex traits like cold tolerance and starvation resistance. The project reveals hundreds of novel candidate genes, shedding light on the genetic basis of these traits.
A new study suggests that Neanderthal demise was caused by a combination of cultural changes, interactions with modern human ancestors, and climatic forces. Computer modeling shows how the two groups interacted and mated, leading to hybridization and the eventual extinction of one group.
Researchers at Van Andel Research Institute have discovered a predictive marker for patient sensitivity to MET inhibitors in glioblastoma. The study may lead to the development of improved therapies for this deadly brain cancer.
Researchers discovered a genetic basis for people's preferences for fatty foods, finding that those with certain forms of the CD36 gene may prefer higher-fat foods and be at greater risk for obesity. The study suggests that genes related to fat perception may play a role in diet adherence and food preference.
A study published in PLOS ONE found that circular RNA molecules are more abundant than previously thought, comprising a substantial fraction of all transcripts identified for many genes. This discovery opens up new avenues for research into the potential functions and relevance of circular RNAs in human biology and health.
Researchers analyzed genetic data to find clues about human migration over 60,000 years ago. They found evidence for an ancient ancestry within Arabia, suggesting it was the first staging-post in the spread of modern humans around the world.
A new study sheds light on the earliest stages of human migration, suggesting that modern humans first settled in Arabia on their way out of Africa. Genetic analysis of mitochondrial DNA genomes provides evidence for an ancient ancestry within Arabia.
A new study reveals that pigeons' visible traits don't necessarily coincide with their genetic makeup, defying expectations. The research analyzed over 350 breeds and found that birds from different breeds can share similar traits, even if they are not closely related genetically.
Research at Oregon State University found that disrupting circadian rhythms causes accelerated neurodegeneration, loss of motor function, and premature death. Disrupted clock mechanisms predispose the brain to neurodegeneration, which may cause more damage to the clock function.
A study analyzing human gut microbes as a complex system reveals patterns corresponding to excess body weight. The researchers found organizational shifts away from a normal state in the gut flora of obese individuals, which may account for their increased energy extraction capacity.
Researchers have found genetic evidence suggesting that the Galapagos giant tortoise species Chelonoidis elephantopus may still exist in the wild, despite being thought extinct for over 150 years. The discovery was made by tracking the DNA of hybrid offspring between this species and another, C. becki, on Isabela Island.
Researchers at Case Western Reserve University have identified a gene activator, Mef2, crucial to the development of schistosomes in humans. The discovery provides a potential target for a vaccine to prevent the disease, which affects over 200 million people worldwide.
Researchers have identified a crucial role for FGF20 in the development of the mouse inner ear, revealing a potential target for regenerating outer hair cells and treating human deafness.
Researchers engineered Anopheles mosquitoes to produce higher levels of Rel2, an immune system protein that attacks malaria parasites. The study suggests that this approach could lead to the development of malaria-resistant mosquito populations.
Researchers identified conserved lincRNAs that affect brain development in zebrafish and found that their human versions have similar functions. The discovery provides a framework for studying lincRNAs, which are abundant but poorly understood molecules.
The SAV001 vaccine, developed by Dr. Chil-Yong Kang's team, has shown strong immune responses in preliminary tests with no adverse effects. It is the only HIV vaccine under development in Canada and one of few globally.
A new study found that human brain development differs from chimpanzees and macaques, with hundreds of genes showing unique developmental patterns in the prefrontal cortex. MicroRNA activity patterns also showed significant differences, potentially linked to human-specific changes in cognitive abilities.
Researchers at Stowers Institute for Medical Research confirm the molecular mechanics of a key regulatory complex implicated in human leukemia are conserved from yeast to humans. They also identify the common molecular shape at the center of the complex, which regulates gene expression through histone methylation.
Researchers discovered a correlation between low-frequency genetic deletions and decreasing height, suggesting that an excess of rare gene deletions may contribute to short stature. The study found that uncommon genetic deletions are associated with short stature in human subjects.
A University of Iowa researcher is using a canine model to study the genetic basis of glaucoma. The goal is to identify potential genetic markers that could be used to diagnose and treat humans with the disease.
A new gene, LRP1, has been identified as the cause of fatal abdominal aortic aneurysms (AAAs). Researchers found that this gene is specific to AAA and not linked to other cardiovascular diseases. The discovery paves the way for new methods to treat AAAs.
Researchers found that boosting a gene in fruit flies' intestinal stem cells extended their lifespan by up to 50% and delayed the aging of their intestine. The study suggests that the gene, PGC-1, can act as a biological dial for slowing the aging process and may serve as a target for new therapies.
Researchers found a vast network of recent gene exchange connecting bacteria from around the world, exchanging 10,000 unique genes via horizontal gene transfer. This exchange is linked to human disease and antibiotic resistance, with 60% of transfers including antibiotic-resistance genes.
Researchers aim to generate antibodies against human proteins without animal testing, using bacterial and yeast libraries to identify active genes. This could lead to a better understanding of human disease and potential therapeutic targets.
A team at Northwestern University has developed a new method to identify thousands of protein molecules quickly, which could lead to the discovery of biomarkers and early disease detection. The approach, known as top-down proteomics, measures proteins intact instead of breaking them down into smaller parts.
Researchers chart gene expression in human brain from fetal development to aging, revealing coordinated changes that shape brain structure and function. The study found reversible gene expression changes after birth and during Alzheimer's disease, with distinct patterns of change at different life stages.
Researchers at Virginia Tech have identified four US strains of the hepatitis E virus in farmed rabbits, closely related to genotype 3, which can spread from animals to humans. The discovery raises concerns about the potential for zoonotic transmission and food safety risks.
Researchers at 23andMe have identified the potential protective nature of the SGK1 gene against Parkinson's disease, particularly for individuals carrying high-risk LRRK2 mutations. This discovery has the potential to inform therapeutic approaches and diagnostics for Parkinson's disease.
Researchers at Georgia Tech discover that genomic gaps in human and chimp genes are caused by viral-like sequences, leading to differences in gene expression and morphology. The study suggests that 'junk DNA' may hold the key to understanding why humans differ from chimps.
A study found that patients with certain genetic variants related to clopidogrel metabolism and platelet function are at higher risk of developing blood clots within coronary stents. The researchers identified three key genetic factors and two modifiable clinical factors that increase the risk of early stent thrombosis
Researchers found that morning UV exposure increases skin cancer risk by 500% compared to afternoon exposure. The study's findings imply that restricting sunbathing or tanning booth visits to morning hours could help prevent skin cancer in humans.
Researchers have made significant progress in xenotransplantation using genetically modified pigs, showing promising results in pig islet and neuronal cell transplants. Clinical trials are underway or planned for these techniques, which could expand to include other organs such as the liver and heart.
A new study by researchers at the University of Zurich has found that humans and great apes share a common evolutionary origin for their cultural behaviors. The research, which analyzed data from over 100,000 hours of orangutan behavior, suggests that genetic factors and environmental influences play a significant role in shaping behav...
A team of researchers has discovered a pervasive human RNA modification that contributes to obesity and type II diabetes. The study shows that this modification process, called methylation, impacts protein expression and function through its action on a common RNA base: adenosine.
Researchers identified a strategy of prevention that has evolved to compensate for the inefficiency of NMD by decreasing the frequency of nonsense errors. Human genes preferentially encode codons less likely to be mistranscribed into premature STOP codons, improving robustness to transcriptional errors.
A recent study has identified millions of new regulatory elements in the human genome, which govern protein formation and are crucial for various central functions. These findings have significant implications for understanding how mutations in genes lead to diseases.
Early humans' immune system responded strongly to Neu5Gc, a sugar molecule found on most animal cells. This response likely reduced reproductive success in males with high levels of Neu5Gc, driving the evolution of human ancestors.