Articles tagged with Human Genetics
Researchers analyzed 16 ancient genomes from Wallacea, revealing striking differences between regions and a previously unknown ancestry contribution from Mainland Southeast Asia. The findings suggest multiple human dispersals into Wallacea and major implications for the understanding of Neolithic dispersals into Island Southeast Asia.
Researchers identify genetic determinants of immune phenotypes in type 1 diabetes, highlighting 11 genes as potential candidates for new treatments. Genetic variants affecting T-cell composition and cytokine production were found to be significantly involved in the disease.
A study found that Brazil's Salmonella vaccine for poultry contributed to the emergence of antibiotic-resistant strains. However, these resistant bacteria have not increased food poisoning cases in humans in the UK.
Researchers discovered a novel mechanism by which non-coding 7S RNA regulates mitochondrial gene expression in human cells. The study found that 7S RNA inhibits transcription via mitochondrial RNA polymerase dimerization, shedding light on the molecular basis of this process.
Researchers at Cedars-Sinai have identified a key gene, NLRP11, that plays a crucial role in the innate human immune system. Deleting this gene prevented an immune sensor from triggering an inflammatory response, highlighting its potential as a target for therapies to prevent or treat inflammatory diseases.
A new study found that microgravity analog culture profoundly affects the microbial infection process in 3-D human tissue models. This is critical for ensuring astronaut health on extended space missions and sheds light on mysterious processes of infection on Earth.
A new platform and genomic database has been developed to monitor and control multidrug-resistant bacteria, with over 500 human pathogens already available. The database aims to provide strategic information on microorganisms classified as a “critical priority” by the World Health Organization.
A gene associated with Nascimento Syndrome triggers cells' defenses against environmental attacks by modifying proteins under stress. Rad6, a master regulator of this process, helps cells adapt to stressful conditions, shedding light on the disease's progression.
Researchers discovered that chromatin entropy increases during aging, leading to epigenetic dysregulation and cellular senescence. The study found that aberrant expression of placenta-related genes is a key driver of cellular aging.
Scientists have successfully sequenced the first human genome from an individual who died in Pompeii, Italy, after the eruption of Mount Vesuvius in 79 CE. The study provides new insights into the genetic history and lives of the population, including evidence of high levels of genetic diversity across the Italian Peninsula.
A study led by Tel Aviv University researchers reveals a common mechanism underlying genetic mutations associated with autism, schizophrenia, and other neurological disorders. The discovery points to an experimental drug developed by the team as a potential treatment for these conditions.
Researchers have found that gamma delta T cells can be trained to become extreme killers by recognizing abnormal target cells. This discovery has implications for developing novel cellular therapies to treat cancer and infectious diseases.
A new study suggests that the world's first farmers did not originate from a single group but from the mixing of two groups of hunter-gatherers. The research team used deep sequencing to analyze ancient DNA and found evidence of population divergence, expansions, and admixture dates, providing a more detailed understanding of the demog...
Whole genome sequences of ancient Uruguayan Indigenous people provide a genetic snapshot of populations before European military campaigns decimated them. The results support the theory of separate migrations into South America, contradicting the idea of a single Native American race across North and South America.
A new study identifies 152 genetic variants shared across multiple psychiatric disorders, including schizophrenia and bipolar disorder. This finding could lead to the development of therapies addressing multiple disorders with one treatment.
A collaboration between researchers identified crucial minerals regulating gene expression to control tissue renewal and growth. Minerals such as silicon, magnesium, and lithium induce endochondral ossification by turning on key genes, leading to the transformation of stem cells into bone cells.
Researchers at NC State University have created a stem cell-derived model that sheds light on the effect of dopamine on gene activity in neurons, revealing gene desensitization in human cells. The study provides a blueprint for future research into the relationship between dopamine and addiction.
A gene defect among people of Inuit ancestry has been discovered, putting children at risk of dying from child vaccines or simple viral infections. The defect is found in 1 out of 1500 Inuits and can be screened for using heel prick blood test samples.
Research suggests that EMFs can cause Alzheimer's disease by building up calcium levels in brain cells. This increase leads to changes in the brain, which develop conditions for Alzheimer's. The study highlights the importance of reducing EMF exposure to prevent or delay the onset of Alzheimer's.
A recent study on the Maniq population found they exhibit high levels of genetic differentiation, similar to other isolated populations. The researchers also discovered that the Maniq retain a unique hunter-gatherer lifestyle and Hòabìnhian-related ancestry, setting them apart from other Southeast Asian groups.
The article highlights the need to move beyond continental ancestry categories in research and medicine, as they can perpetuate medical stereotypes and exacerbate health disparities. Instead, researchers are adopting a multidimensional approach to genetic ancestry, one that reflects continuous variation and historical depth.
A new study by an international team of scientists links early human habitats to past climate shifts using a supercomputer model and fossil records. The research suggests that climate change played a central role in determining where different hominin groups lived and their remains were found.
Researchers analyzed genomic profiles of over one million cells from 1,000 people, identifying a link between specific genes and immune cell types in autoimmune diseases. The discovery could lead to tailored treatments and refine clinical trials.
A new technique called Operational Genomic Units (OGU) allows for improved resolution and simplicity in analyzing microbiome samples. By using individual genomes as basic units, researchers can pinpoint biologically relevant characteristics such as age and sex with greater accuracy.
A new study by Princeton University researchers reveals that macrophages, a type of immune cell, are crucial in the early immune response to SARS-CoV-2. The study used humanized mice with human lung tissue and blood stem cells to investigate the role of macrophages and identified specific genes associated with an effective antiviral re...
A multidisciplinary team analyzed ancient DNA from the Carpathian Basin to reveal clues about the Avars' origins. The research found that the Avar elites had ancestry from Northeast Asia and the North Caucasus, suggesting a rapid trans-Eurasian migration
The T2T consortium's completed human genome has shown significant improvements in DNA sequencing accuracy, correcting tens of thousands of errors and revealing millions of genetic variations. This new reference genome can support the analysis of over 200 genes of medical relevance, potentially propelling research into genetic disorders.
Ancient genomes from 39 archaeological sites indicate that Xinjiang was settled by people with central and eastern Eurasian Steppe ancestry during the Bronze Age. The region received an influx of East and Central Asian ancestry later, resulting in genetically mixed populations throughout the Iron Age.
Researchers fill in gaps in Human Reference Genome, discovering repetitive sections are a major source of human variation and genetic diversity. The Telomere-2-Telomere project reveals complex architectural features with significant consequences for understanding human evolution and biological function.
A self-contained experiment is being sent to the International Space Station to investigate stress and DNA damage caused by space travel. The goal is to determine if genomic damage experienced during space travel is linked to the silencing of a specific gene, beta-arrestin1.
A report by the British Pharmacological Society and Royal College of Physicians recommends integrating pharmacogenomic testing to ensure medicines work safely and effectively for individual patients. The UK is a world leader in genomic medicine, and expanded testing would further demonstrate this leadership.
A new Brazilian database of whole-genome sequences brings diverse genetic information to international databases, shedding light on the genetics of aging and disease in Brazil's elderly population. The study identified over 2 million novel genetic variants, providing insights into the health and well-being of older adults.
A recent study found that genetic changes in dogs' brain tissues are primarily about the number of genes affected rather than their function. The researchers discovered that approximately 3,500 genes were differentially expressed between young and old dogs, with most genes showing reduced activity in older animals.
Researchers found that at least 17.7% of regulatory regions contain more than one causal variant, suggesting a weaker effect of individual variants on human traits. The study's findings challenge the long-held assumption of a single causal genetic variant underlying complex phenotypes.
Researchers discovered that an inorganic polyphosphate released by nerve cells contributes to the death of motor neurons in people with ALS and frontotemporal dementia. The study found that lowering levels of this toxin may be an innovative therapeutic strategy for diverse types of ALS/FTD.
A new protein called NDF has been discovered to enhance gene activation and may be involved in diseases like cancer. Found in all human tissues, NDF works by stimulating RNA polymerase elongation, a key step in gene expression.
The placenta plays an active role in transferring vitamin D to the fetus during pregnancy, according to a new study. The research found that the placenta takes up vitamin D through endocytosis, which enables it to deliver this essential nutrient to the developing fetus.
A new Michigan Medicine study suggests that genes from oceanic bacteria have entered the human gut microbiome, enabling digestion of seaweed polysaccharides. The research found that these genes are more common than previously recognized and are linked to the ability to process certain seaweed-derived sugars.
Researchers have discovered that bioprosthetic heart valve patients develop an immune response against foreign sugars in the valves, leading to calcification and deterioration. By genetically engineering these sugars out of the valves, durability can be increased, offering a potential solution for patients.
A recent study by La Jolla Institute for Immunology researchers has identified new subsets of CD4+ 'helper' T cells that are linked to autoimmune disease risk. The team used single-cell RNA sequencing to compare gene expression in over 1 million CD4+ T cells from 89 healthy donors, revealing sex-based differences in immune cell functio...
Researchers created largest human genealogy by combining thousands of modern and ancient genomes across various datasets. This unified genealogy offers insight into key events in human history, including the timing and geographical locations of migration events like the out-of-Africa migration.
A study by Arizona State University shows that certain proteins can act as efficient electrical conductors, outperforming DNA-based nanowires in conductance. The protein nanowires display better performance over long distances, enabling potential applications for medical sensing and diagnostics.
A COVID-19 genetic risk variant inherited from Neandertals reduces the risk of contracting HIV by 27%. This variant is associated with fewer CCR5 receptors, which can lower the risk of HIV infection.
Researchers used identical twins to exclude genetic influences and track immune system changes responsible for triggering multiple sclerosis. The study found that an error in the communication of immune cells leads to greater activation of T cells, causing damage in the central nervous system.
A new study finds that certain COVID-19 variants can escape the human immune system's cytotoxic T cell response in a significant portion of the population. The researchers identified 1,222 epitopes associated with major HLA subtypes, covering about 90% of the human population.
A new study finds that immune cells clear away a key Alzheimer's disease protein on an oscillating daily cycle controlled by circadian rhythms. The discovery provides a potential mechanism linking Alzheimer's disease to disruptions in sleep cycles and may lead to the development of chronotherapeutics.
A recent study by KU Leuven and The Francis Crick Institute analyzed 2,658 tumor samples and found that 21% exhibited double mutations in both maternal and paternal DNA copies. This discovery sheds new light on the origin of mutations and their role in cancer development.
A comprehensive study has revealed over 7,000 human transcription factor (TF) protein-protein interactions, with most playing important roles in transcriptional regulation. The study identifies groups of TFs with specific biological functions, such as chromatin remodelling and RNA splicing.
Research from the University of Georgia reveals that compounds used to fight fungal diseases in plants are causing resistance to antifungal medications used to treat people. The study found 12 strains of Aspergillus fumigatus resistant to both agricultural and clinical azole fungicides, suggesting a link between environmental and human...
An international research team reconstructed the genome of Steller's sea cow from fossil remains, finding inactivations of genes responsible for its unique skin structure. The study reveals a dramatic reduction in population size contributing to the species' extinction.
A recent study has identified 29 new genetic variants associated with acne, providing potential new targets for treatment and helping clinicians identify individuals at high risk of severe disease. The research, involving over 20,000 individuals with acne, also found a link between genetic risk and disease severity.
A new DNA benchmark, developed by NIST and collaborators, enables more accurate detection of genetic variants linked to diseases such as spinal muscular atrophy. The benchmark, based on HiFi sequencing technology, helps labs and clinics sequence genes with high accuracy, critical for disease diagnosis and treatment.
Scientists from Japan and USA develop a microfluidic device for purification of tuberculosis genomic DNA fragments, enabling accurate diagnosis of diseases. The device uses transient ITP and electrokinetic trapping to detect and purify small cfDNA fragments.
A study found that humans have evolved less sensitive noses compared to other primates, with genetic variations affecting scent perception. Researchers screened the genomes of over 1,000 Han Chinese people and an ethnically diverse population to identify novel genetic variants associated with odor detection.
A groundbreaking genome-wide association study identified 123 genetic regions linked to migraine risk, including two specific genes targeted by recently developed drugs. The study provides insight into the biological basis of migraine and its subtypes, paving the way for new treatments.
Researchers developed a method called 6mASCOPE that measures DNA tagging system accuracy and distinguishes bacterial from human DNA. The study found high levels of methylation in plant, fly, mouse, and human cells, but mostly attributed to contamination.
Dr. John Pierce Wise leads a team to investigate chromosome instability in lungs caused by metal exposure, with hopes of preventing and reversing lung cancer in people. The research aims to understand why humans are more susceptible to metals-induced lung cancer than whales.
A new study published in Genome Research has identified a group of genes that play a crucial role in building cellular components and may contribute to human longevity. Inhibiting these genes may increase lifespan by reducing their impact on the body later in life.
Scientists have developed a novel CRISPR-Cas3 editor from the bacteria Neisseria lactamica that improves editing efficiency and is more easily produced. The tool enables 50% editing efficiency in stem cells and 95% efficiency in other human cell lines, paving the way for research in genetic diseases and developmental biology.
Researchers found that a third of patients with wet age-related macular degeneration can safely stop eye injection therapy without further vision loss. Patients who stopped treatment showed better visual acuity, gain of vision, and less fluid in their retina compared to those requiring continued injections.