Articles tagged with Human Genetics
The University of Washington's new DNA fin-printing project aims to create open-access databases for Pacific salmon populations, helping managers and scientists understand their ocean migration. By employing genetic markers, researchers can distinguish between individual fish and track population movements, informing conservation effor...
Research on human RecQ helicases reveals their role in regulating homologous recombination, a DNA repair pathway. Mutations in these enzymes cause cancer-predisposition syndromes, highlighting their importance in maintaining genomic stability.
A recent study from the University of Toronto found significant differences in how genetic material is spliced to create proteins in humans and chimpanzees. The researchers discovered that six to eight per cent of alternative splicing events showed differences, which are associated with various diseases.
Researchers at M. D. Anderson Cancer Center have identified a tumor-suppressor gene that suppresses lung tumors in mice and could provide new approaches for lung cancer prevention, diagnosis, and treatment. The GPRC5A gene is under-expressed in human lung cancer cells and its expression was found to be lower in 61% of human non-small c...
A study reveals that excess sugar consumption decreases SHGB production in the liver, a protein regulating sex steroid entry into tissues. This reduction is associated with increased fat palmitate levels and inhibited by inhibiting palmitate generation.
A team of Stanford University researchers has identified a gene responsible for giving dogs their black fur, revealing its potential connection to human stress adaptation and weight regulation. The discovery was made by analyzing DNA samples from hundreds of dog breeds, including boxers and Large Munsterlanders.
Researchers at Michigan State University have identified a new gene, JY-1, necessary for embryonic development in dairy cows. The discovery may offer insights into the cause of infertility in women, who also experience single egg release and individual births, unlike mice which release multiple eggs.
Scientists found that at least 1% of Neanderthals were likely redheads due to a point mutation in the MC1R gene. The discovery suggests that Neanderthals' pigmentation may be as varied as modern humans', with implications for understanding the evolution of human traits.
Scientists used a genetic tool to study human embryonic stem cell self-renewal and differentiation. They found that reducing or increasing the expression of oct4 gene induced differentiation, revealing a key difference in early human development regulation compared to mice.
Two scientists report a new type of mouse replaced an old type in Volo Bog between 1976 and 2001, with genetic differences apparent in just 25 years. The study suggests that environmental changes can drive rapid adaptation in animal populations, highlighting the need for conservation efforts.
A recent study reveals that Neandertals shared key changes with modern humans in the FOXP2 gene, which plays a crucial role in speech and language. This finding suggests that Neandertals may have possessed some prerequisites for language, challenging previous estimates of when human language emerged.
A team of researchers from Arizona State University has discovered the earliest evidence of modern human behavior in South Africa, dating back 164,000 years. The findings suggest that early humans expanded their diet to include shellfish and other marine resources, likely as a response to harsh environmental conditions.
Scientists have discovered a new gene, Dmp1, linked to human lung cancer, which is often deleted in lung tumors. The study found that the non-functional Dmp1 gene leads to reduced activity of tumor suppressors p53 and Arf, allowing cancer cells to grow unchecked.
Researchers at Baylor College of Medicine and Rice University have developed a molecular map of the influenza B virus's hemagglutinin protein. The study reveals similarities between the protein's sequence and function in flu A and B strains, suggesting that minor mutations could enable bird flu to spread among humans.
Scientists identified DMP1 as a tumor suppressor that activates Arf expression, inducing p53-dependent cell cycle arrest. DMP1 deletion or haploid insufficiency accelerates lung cancer development in K-ras mutated mice and patients, suggesting its potential as a target for drug therapy.
Human migration out of Africa and into Asia occurred in at least four pulses, driven by climate and sea level changes. The initial migration was thwarted, but subsequent pulses took advantage of stable climates and sea levels to expand into eastern Asia, Australia, and Melanesia.
People with a history of allergies have a nearly third lower risk of developing certain brain cancers, such as glioma. Meanwhile, genetic studies identified three locations on human chromosome 8q24 associated with an increased risk of prostate cancer.
A study on human, chimpanzee, and rhesus monkey genomes reveals that humans and rhesus monkeys have purged ERV-K copies from their genomes, while chimpanzees have retained a greater number of complete ERV-K copies. This finding suggests that genetic fluctuations due to bottlenecks and expansion play a role in shaping ERV-K dynamics.
New findings suggest that misfolded proinsulin can cause beta cell dysfunction and death, leading to an insulin shortage. This can result in the hallmark symptoms of diabetes, including high blood glucose levels.
A new DNA method developed at the University of Copenhagen uses hair samples to answer questions about human history, such as why mammoths died out. The technique also holds promise for forensic analysis in crime solving, providing faster results than traditional methods.
A team of researchers discovered a key protein in plants that creates drug resistance and is similar to proteins found in humans. This finding could help uncover new factors contributing to variable drug responses in humans and advance the understanding of drug sensitivity.
A brain system known to regulate food intake also controls fat storage and metabolism in the body completely independently of food consumption. The melanocortin system may be used to develop new medications to treat human obesity.
A new study has found that bats exhibit unparalleled genetic variation in the FOXP2 gene, which is linked to their unique ability of echolocation. This discovery adds weight to the theory that FOXP2 plays a crucial role in the sensory-motor coordination of vocalizations.
Researchers identified a consistent association between the TRAF1/C5 region and rheumatoid arthritis, suggesting a link to the inflammatory response. The study adds to accumulating evidence that this genetic region is associated with the disease, paving the way for further investigation into its role.
Researchers discovered that specific genetic variants of an odor receptor determine how people perceive pleasant or unpleasant odors. The study focused on two sex steroid-derived chemicals and found that different genetic variations led to varying reactions.
Researchers found humans carry more gene copies than ape relatives to produce more amylase enzyme, which digests starch. This discovery bolsters the idea that starch played a crucial role in early human diet and evolution.
A study published in Neuron found a link between the toxic brain protein Aâ peptide and neuronal overexcitation, leading to compensatory rewiring of brain circuitry. This overexcitation can contribute to cognitive deficits in Alzheimer's disease. Researchers suggest blocking this overexcitation may prevent such neurological deficits.
Researchers have created 3D images of fruit fly brains using optical projection tomography, shedding light on genetic research into Alzheimer's and other human diseases. The images allow scientists to visualize gene expression patterns and gain insights into the human brain.
Researchers found that the genes responsible for color vision in aye-ayes are fully functional, contradicting the long-held theory that nocturnal mammals lose color vision over time. The study sheds light on the evolution of color vision and highlights the importance of examining rare and endangered species.
Researchers at JCVI have published the first true diploid genome from one individual, Craig Venter's, covering over 2.8 billion base pairs. The study reveals high genetic variation between two chromosomes within an individual and uncovers a total of 4.1 million variants, including 3.2 million SNPs.
A study by Cardiff University scientists suggests that human activities such as deforestation and poaching are driving the decline of the giant panda population. The research finds that conservation efforts should focus on habitat restoration and protection to ensure the species' survival.
Researchers discovered that an analog of rapamycin halts production of antibodies and development of lupus in mice, suggesting a potential new approach to combating the disease. The study found that this compound improved symptoms and halted disease progression across different genetic strains of lupus-prone mice.
New research from Duke University reveals that the way genes are used in humans differs significantly from that of chimps and other primates. The study found dramatic differences in gene regulation related to brain development and diet, which may have contributed to human adaptability and susceptibility to certain diseases.
A study reveals that excessive natural antioxidants can lead to reductive stress and heart failure in mice with a specific human mutation. The findings suggest that targeting the antioxidant pathway through a particular enzyme may modify the phenotype of the disease in humans.
Researchers used genetic analysis to determine the origin of a widely disputed stem cell line. The study found that the cell line was derived from a parthenogenetic embryo, not somatic nuclear transfer as previously claimed.
Researchers at Tufts University have identified a specific DNA sequence that increases chromosome breakage and stalls replication, which can lead to cancer. The study's findings suggest that this sequence may be responsible for the fragility in human chromosomes associated with common fragile sites.
A team of researchers at Rice University studied the gene LMO4 in zebrafish, discovering its role in regulating brain growth and development. They found that overexpression of the gene led to shrinkage of brain areas, while underexpression caused their enlargement.
A Cornell study found evidence of recent human adaptation, with 101 regions of the human genome showing strong selection signs. These include genes related to skin pigmentation, muscle attachment, and immune system function.
Researchers found that prenatal cocaine exposure in zebrafish altered neuronal development and acutely dysregulated the expression of circadian genes, including melatonin. Circadian factors may provide new therapeutic strategies to counteract developmental effects of prenatal cocaine exposure.
The Genographic Project, launched in 2005, uses genetics to address anthropological questions globally. The project provides a periodically-updated database comprising all donated data and the Nearest Neighbor haplogroup prediction tool, allowing for accurate classification of mitochondrial lineages.
New study reveals chimpanzees act altruistically toward genetically unrelated conspecifics, even when no reward is expected. This finding suggests the evolutionary roots of human altruism may be deeper than previously thought, reaching back to the last common ancestor of humans and chimpanzees.
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 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 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 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.