Articles tagged with Human Genetics
Researchers at Fred Hutchinson Cancer Center studied an ancient retrovirus, PtERV1, which infected nonhuman primates 4 million years ago. They found that humans have innate immunity to this virus, but this resistance may have made them more susceptible to HIV infection.
Researchers at University of Utah have developed a faster and less expensive technique for mutating vast, non-gene stretches of DNA. This new approach enables the evaluation of regulatory sequences that control gene expression, potentially leading to breakthroughs in human disease research.
Researchers have characterized mutant phenotypes of fly lamin genes, showing they cause neuromuscular defects and premature aging similar to human laminopathies. This study provides insight into the divergence of gene expression and function through evolution, promising greater understanding of lamin functions and diseases.
Researchers at Harvard University have developed tiny implantable biocomputers that can precisely scan cellular activity, enabling targeted therapies for diseased cells. The devices, constructed from DNA, RNA, and proteins, could revolutionize medicine by directing treatments to specific cells or tissues.
Researchers found that transcription factors bind to different sites in human and mouse liver cells, suggesting distinct regulatory mechanisms. This discovery could help identify patterns in gene expression and provide guidance for researchers using mice to understand human biology.
Researchers have identified the cancer stem cell of rhabdomyosarcoma, a childhood cancer, and uncovered a novel genetic signature driving its progression. The discovery opens up new avenues for targeted therapies to prevent recurrence and metastasis.
The gray, short-tailed opossum's genome reveals insights into connections between humans and other species, as well as the evolution of mobile elements. Mobile elements make up about 52% of the opossum genome, with distinct compositional differences compared to primate genomes.
The opossum genome sequence has provided significant insights into the evolution of the mammalian immune system, revealing similarities with human immune-related genes. The sequence also revealed ancient DNA elements that have been recruited for specific biological activities, such as regulating gene expression.
A recent study identified a gene mutation that contributes to human cognition, which is exclusive to humans. The mutation affects the splicing pattern of the neuropsin gene, creating a longer protein involved in learning and memory.
Deepak Srivastava, GICD Director, received the prestigious E. Mead Johnson Award for his work in understanding normal and abnormal cardiogenesis. His research focuses on using knowledge of cardiac developmental pathways to devise novel therapeutics for human cardiac disorders.
Researchers discovered a genetic mutation that increases muscle mass and enhances racing performance in whippets, similar to humans. Whippets with one mutated copy of the myostatin gene are more muscular and fast, while those with two mutated copies have excessive muscle and poor athletic performance.
Bruce Stillman, Cold Spring Harbor Laboratory President and Cancer Center Director, has received the Curtin Medal for his pioneering work on DNA replication in cells. His research focuses on understanding illness, particularly cancer, and has contributed to knowledge of human virus replication and genome accuracy.
The study identifies a cluster of essential genes on mouse chromosome 11 that are highly conserved across species, including humans. This finding suggests that there may be rules governing the structure and organization of chromosomes.
Researchers discovered that protein RecQ takes on opposite functions in E. coli compared to yeast and humans, highlighting the need for considering both possibilities when studying protein roles in disease. The study found three forms of RecQ associated with cancer syndromes in humans, while its function in E. coli promotes cell death.
A microRNA in mouse immune cells is shown to balance the response of immune defenses, with its equivalent human gene playing a vital role. Knockout mice develop autoimmune symptoms and are less resistant to bacterial infections, highlighting the importance of this microRNA in the immune system.
A study by the Spanish Ageing Research Network found that melatonin, naturally present in food sources like corn, oats, and cherries, delays oxidative damage and inflammatory processes typical of old age. Daily melatonin intake could prevent or delay illnesses related to aging, such as neurodegenerative disorders and diabetes.
Researchers at Stanford University School of Medicine and the University of California-Santa Cruz found nearly 10,000 identical genetic snippets that play a role in controlling when genes turn on and off. These 'regulatory jungles' are abundant near genes involved in cell migration and organ development.
Research by Erik Trinkaus suggests that early modern Europeans exhibited Neandertal traits, reflecting both African and Neandertal ancestry. The analysis indicates a small behavioral difference between groups, suggesting they saw each other as social equals.
Researchers analyzed the macaque genome to identify genes that have evolved in humans compared to other primates, finding significant changes in hair and immune system genes. The study also identified genetic variations on the X chromosome, providing insights into human evolution and disease gene identification.
The draft sequence of the rhesus macaque genome will enable researchers to study disease progression at the genetic level, providing insights into human health and evolution. The findings also reveal unique aspects of the macaque's immune system response and genome organization.
Researchers identified a dominant gene mutation in Dmc1 that causes male infertility in mice. The study provides insights into the genetic causes of infertility in humans and suggests potential applications for fertility treatments.
A study published in Science found a mutation in the IGF1 gene that affects body-size differences among dog breeds and may also play a key role in determining human body size. The researchers analyzed DNA from over 3,000 dogs of different breeds to identify genes linked to size variations.
Researchers at Texas A&M University are studying fruit flies to understand cellular differentiation and chromosome counting. They hope to uncover mechanisms that can help shed light on human genetic maladies such as color blindness and hemophilia.
Researchers discovered a gene called Atp5a1 that, when mutated, reduces the incidence of polyps in mice. The mutation leads to decreased levels of Atp5a1 gene expression, which may provide insights into its potential role in human cancer.
Research reveals that birds can live with higher doses of sex-related genes due to ineffective dosage compensation. This challenges current thinking about the role and mechanisms of dosage compensation in species with heteromorphic sex chromosomes.
A University of Florida study reveals that humans acquired pubic lice from gorillas around 3.3 million years ago, providing insights into human evolution and the history of parasites. The research suggests that lice can be transmitted through non-sexual means, such as sleeping in close proximity or feeding on prey.
A study published in PNAS reveals that genes of human and chimpanzee underwent a rigorous two-step filtering process, with radical mutations more harshly screened. The researchers estimated that around 10-12% of genetic changes between humans and chimpanzees are adaptive, with most responsible for significant evolutionary divergence.
Researchers found that increasing connexin26 in mice with missing connexin30 restored hearing sensitivity and prevented hair cell death. The discovery suggests a potential drug treatment for congenital deafness, which may replace gene therapy.
Six UCI scientists received CIRM SEED grants to study human embryonic stem cells in various diseases, including muscular dystrophy and mitochondrial dysfunction. The research aims to develop therapies for patients suffering from these conditions and improve the therapeutic potential of human embryonic stem cells.
A Finnish twin study reveals that acquired obesity is associated with deleterious alterations in lipid metabolism, including increased lysophosphatidylcholines and decreased ether phospholipids. The study also found a link between the obese twins' serum lipidomic profile and whole body insulin resistance.
Cold Spring Harbor Laboratory scientists have identified a new tumor suppressor gene, CHD5, which prevents multiple types of cancer. The gene's role in regulating the tumor-preventing power in cells suggests that modulation of its activity may provide novel strategies for better design of more effective cancer therapies.
Research by G. Edgar Folk and colleagues found that Arctic animals, including rodents, maintained a 24-hour cycle of rest and activity despite living in continuous light. The study suggests that these animals may be conscious of the sun's position in the sky and use it as a cue to regulate their circadian rhythm.
A prototype code of ethics for life sciences aims to shape ethical practice by defining principles such as objectivity, research freedom, and virtues like duty and integrity. The code is necessary due to the high stakes of scientific advancements in human history.
A University of Utah study found that a mutant gene that affects nerve-cell elasticity may have contributed to spinocerebellar ataxia type 5 (SCA5), a disease previously linked to President Abraham Lincoln's family. The discovery raises the possibility that Lincoln himself may have had SCA5.
A 40,000-year-old skull found in Romania shows both modern human and Neandertal characteristics, indicating complex population dynamics as humans spread into Europe. The skull, named Oase 2, has a mix of archaic and derived features, raising questions about the evolutionary history of modern humans.
Researchers reevaluate human migration, proposing a new timeline for the spread of modern humans out of Africa. According to studies involving fossil analysis and genetic research, this migration likely took place between 40,000 and 60,000 years ago.
Researchers discover a mutant gene that affects the body's natural wake-up time, shedding light on the genetic basis of sleep in humans. The study provides new insights into the circadian clock's regulation and may lead to therapies for conditions like jet lag and shift work sleep disorder.
Despite rapid brain growth, human brain genes have slowed down evolution since the split from chimpanzees. Complexity and gene-gene interactions place constraints on brain genes, hindering change. Genes in humans evolve more slowly than in other primates or mice.
Researchers found that humans and chimps share approximately 96% of their genes, with the remaining 4% being unique to each species. The study discovered a significant increase in gene duplication among humans, including those influencing brain functions, providing new insights into human evolution.
New research at Washington University School of Medicine finds that the relative abundance of two common gut bacteria groups is altered in obese humans and mice. The findings suggest that these microbes may play a role in how much energy is extracted from the diet and stored as fat.
University of Florida researchers validate the use of mitochondrial DNA (mtDNA) to study ancient migrations and population sizes. By analyzing correlations between mtDNA diversity and protein variation, they demonstrate that mtDNA remains a useful tool for understanding population dynamics.
Researchers found 56% of gene families studied across five species have grown or shrunk, suggesting frequent evolutionary changes. Humans gained 689 genes through gene duplication and lost 86 since diverging from chimps.
The sea urchin genome shares significant similarities with the human genome, including genes associated with Parkinson's, Alzheimer's, and Huntington's diseases. The discovery could hold key insights into developing new treatments and therapies.
Scientists studying Neanderthal teeth using X-rays from the ESRF found that their dental development is very similar to modern humans. The research team discovered complex folding of the enamel dentine junction, which suggests a deep embryological origin and may have been functionally significant.
The genomes of Neanderthals and modern humans are at least 99.5-percent identical, yet there is no evidence of significant crossbreeding between the two species. This finding has significant implications for our understanding of human evolution and ancestry.
Researchers have identified key genetic changes required for the H5N1 avian influenza virus to adapt to easily recognize human receptors. The study provides a molecular blueprint for these changes, which could help detect pandemic strains earlier and prepare public health officials and vaccine manufacturers.
A recent genetic study reveals that humans and Neanderthals shared a common ancestor around 706,000 years ago, but the two species diverged around 370,000 years ago. The study found no evidence of genetic admixture between Neanderthals and humans, contradicting previous theories.
Researchers have sequenced the sea urchin genome, revealing a powerful model system for studying embryonic development and immunity. The study's findings could lead to new insights into human skeletal formation and immune system function.
The sea urchin genome reveals 23,300 genes and a sophisticated innate immune system. Humans share genes associated with diseases like muscular dystrophy and Huntington's disease with these eyeless animals, which can sense light through their feet.
A study reveals human-specific sequence changes in DNA sequences regulating nerve cell adhesion molecules, leading to the uniquely human features of brain development and function. The researchers identified accelerated evolution of conserved noncoding sequences near genes involved in neuronal cell adhesion.
Researchers have identified TRP channel genes as crucial in nicotine dependence, which could lead to new treatments for tobacco addiction. The study uses C. elegans worms as a model to understand the genetics of nicotine dependence.
A study in fruit flies reveals how genes respond to alcohol, offering insights into human susceptibility to abuse. The researchers found that exposure to alcohol modifies the expression of many genes in flies, some of which are also present in humans.
Researchers identified 202 'highly accelerated regions' of DNA that have undergone rapid evolution since humans and chimps diverged, with most not coding for genes. These regions are conserved across multiple species, suggesting they play important roles in controlling gene expression and development.
Early mammals' eyes have only one version of the photoreceptor gene that detects light, unlike birds, fish, and amphibians with two versions. This suggests they may have been nocturnal creatures.
Researchers have identified a gene mutation in fruit flies that regulates sensitivity to alcohol. The study found that some fruit flies were more resistant to alcohol's sedative effects, and the researchers isolated the specific genetic mutation responsible.
A Dutch researcher found that genetic characteristics, such as sweat production and brain receptor genes, can predict which drug works best for each patient. This information may lead to more effective treatment allocation for alcoholics.
The study provides valuable insights into the genetic causes of Parkinson's disease and offers a starting point for further research. Researchers have made the data publicly available, creating a resource that can be used by other scientists to accelerate progress in the field.
Researchers found a unique genetic mutation that makes people susceptible to herpes simplex virus-1, leading to viral encephalitis. The study challenges current thinking on how genes work with infections, providing new insights into the immune system's response to pathogens.
Researchers at Mayo Clinic have discovered that HIV requires a specific human protein, LEDGF/p75, to integrate into the human genome. The study found that disrupting this connection could lead to new therapies for HIV or safer gene therapy methods.
Researchers at Michigan State University have identified 5,331 unique genes in the human egg, which may hold the key to understanding fertility issues and developing new stem cell therapies. The discovery could also pave the way for the creation of healthy stem cells without the need for fertilized embryos.