Articles tagged with Human Genetics
Scientists have discovered multiple instances of genetic interbreeding between Denisovans and modern humans, shaping early human history. Denisovan genes confer advantages in distinct environments, such as tolerance to low oxygen conditions and heightened immunity.
A study analyzing DNA from skeletal remains in Pompeii casts reveals the cosmopolitan origin of the city's inhabitants, contradicting previous physical appearance-based assumptions. Genetic data also sheds light on ancestry, sex, and familial relationships, challenging traditional notions.
The study shows an alternating series of interaction and gene flow between inhabitants of mountainous upland regions and steppes to the north of the Caucasus. Innovations in herd management, dairying, and mobility enabled autonomous nomadic lifestyles adapted to exploit the Eurasian steppe zone.
The ASHG 2024 Annual Meeting will showcase the latest research in human genetics and genomics. The event will feature a Presidential Symposium on Mendelian traits and a Distinguished Speakers Symposium on the promise of human genetics and genomics, among other sessions.
A new study finds that the gene for starch-digesting saliva may have first duplicated more than 800,000 years ago, seeding genetic variation that shapes modern diet. This early duplication set the stage for significant variation in the amylase region, allowing humans to adapt to shifting diets with increasing starch consumption.
Researchers identified a protein that could improve the cardiovascular health of patients with progeria, a rare genetic disorder. The discovery provides promising insights into potential treatments targeting cardiovascular complications in HGPS.
Researchers at Colorado State University have identified an alternate method to study changes during the DNA replication process in lab settings using genetically modified yeast. This new approach provides a less toxic and quickly reversible alternative to hydroxyurea, allowing for better insight into cell cycle arrest mechanisms.
A study found that HLA-DRB1*01:03 is associated with severe ulcerative colitis, requiring major operations and systemic corticosteroid use. The allele has previously been linked to ulcerative colitis incidence, supporting earlier genetic studies.
A study of a 2000-year-old Yayoi individual's genome found that the majority of Japanese immigration came from the Korean Peninsula during the Yayoi and Kofun periods. The discovery provides new insights into the details of ancient immigration patterns to Japan.
Researchers have identified six epigenetic hallmarks that characterize transformed cells, including DNA methylation, viral reactivation, and histone protein modifications. These properties enable cancer cells to evolve and resist therapy, making them a key target for improving diagnosis and treatment.
Researchers developed a compact 'gene scissor' tool, TnpB, which shows a 4.4-fold increase in efficiency of modifying DNA, making it more effective as a gene editing tool. The tool can be used to treat patients with familial hypercholesterolemia, reducing cholesterol levels by nearly 80%.
Researchers at the Icahn School of Medicine at Mount Sinai have identified a novel genetic variant associated with intellectual capacities and educational outcomes. Tandem repeats in the AFF3 gene were found to disrupt genetic instructions, impacting cognitive abilities.
A study published in Nature Communications found that one in eight newborn babies has a genetic protection against jaundice. The researchers identified a specific gene variant that codes for an enzyme linked to increased bilirubin metabolism, providing an opportunity for personalized medicine.
Researchers identified a genetic cause of TNF deficiency, which incapacitates a specific immune process in the lungs, leading to targeted and severe illness. This finding may upend long-held assumptions about the immune system and have far-reaching clinical implications.
A study by the Open Wild Wheat Consortium explains how Aegilops tauschii, a wild grass, contributed to the genetic diversity of bread wheat, enabling its rapid spread across different climates. This hybridization event allowed humans to settle down and form societies.
Researchers unveil retrotransposon-derived DNA zip codes that enable myeloma cell internalization, shedding light on cancer evolution and treatment response. The findings highlight the potential of zip-code technology in improving patient outcomes and advancing human health.
Researchers genetically engineered Toxoplasma gondii to produce and release therapeutic proteins in the human brain, bypassing the blood-brain barrier. The method has potential implications for treating diseases caused by protein deficiencies or abnormal expression.
A new model developed by Penn State researchers more accurately predicts the causal relationship between genetic and environmental factors in disease development. The study found that lifestyle and environmental factors play a larger role than previously believed, offering new opportunities to mitigate disease risk.
Scientists have discovered a novel mechanism of dosage compensation in platypus and chicken, where protein levels are balanced despite imbalanced mRNA levels. This finding challenges previous assumptions about the role of RNA in gene expression.
A new study using data from the VA Million Veteran Program reveals substantial similarities in the genetic architecture of complex traits across four population groups. The analysis identified 26,049 variant-trait associations and showed that non-European populations contribute significantly to genetic diversity.
A new study has generated a global catalog of human gene expression data from around the world, increasing representation of understudied populations. The increased diversity empowers researchers to attain more-accurate insights into genetic factors driving human variation and disease risk.
A study found that living in disadvantaged neighborhoods is associated with higher stress-related gene activity, which could contribute to aggressive prostate cancer in African American men. The research also linked five genes related to inflammation to an increased risk of prostate cancer.
Researchers found evidence of multiple waves of genetic intermingling between modern humans and Neanderthals, challenging previous theories. The study reveals a more intimate connection between early human groups than previously believed.
A genetic investigation of 64 child remains found at Chichén Itzá reveals that all the children were male, indicating related male twins were likely selected for ritual activities. The findings suggest a post-sacrificial burial site, with the sacrificed individuals having been chosen for a specific reason.
Researchers discuss Ibrutinib, a BTK inhibitor approved for chronic lymphocytic leukemia treatment, noting 20-25% of patients experience dose-limiting cardiovascular toxicities. A recent study identifies genetic biomarkers, such as KCNQ1 and GATA4, associated with cardiotoxic events, which may improve risk stratification.
A new genetic analysis of Celtic burial mounds in Baden-Württemberg, Germany, confirms the long-held suspicion that two princes were biologically related. The study finds a close relationship between the two individuals and suggests that power structures among early Celtic elites may have been based on biological kinship.
A new study has discovered that bank voles in southern Sweden carry a virus that can cause hemorrhagic fever in humans, spreading the disease further south than previously known. The virus strain is closely related to strains from Finland and Karelia.
A study led by Andrea Migliano from the University of Zurich has discovered previously unknown links between culture, language, and genes among different hunter-gatherer populations in Central Africa. The team found that musical instruments were exchanged long before agricultural populations arrived in the region, suggesting extensive ...
Researchers sequenced ancient genomes to understand the genetic composition of western plateau populations over 3,500 years. They found complex interactions between southern and western plateau populations, with Central Asian components introduced around 2,300 years ago.
FutureNeuro, a leading SFI Research Centre, is expanding its research programme with a focus on diagnostics, therapeutics, and digital health. The centre aims to develop precision diagnostics, future treatments, and systems using real-time health data.
A University at Buffalo-led research team has found that the same genes whose mutations gave rise to a low functioning male gorilla reproductive system may also be responsible for human male infertility. Researchers identified 109 reproductive-related gorilla genes that are often mutated when present in infertile men.
A large-scale study has identified over 2,000 genetic signals associated with blood pressure, providing a more detailed understanding of the complex trait. The findings lead to improved polygenic risk scores, which can predict blood pressure and hypertension risk.
A team of researchers has discovered the role a specific protein complex plays in certain forms of immune dysregulation. SHARPIN deficiency is linked to autoinflammation and immunodeficiency, but unexpectedly does not manifest dermatological issues. Treatment with anti-TNF therapies resolves symptoms.
A new study found that genetic variants in lysosomal genes may contribute to the development of Parkinson's disease in individuals exposed to high levels of pesticides. The research suggests a potential gene-environment interaction, where minor changes in these genes can lead to increased disease risk under stress.
Researchers analyzed ancient DNA data from 424 individuals to reconstruct Avar community structures and social dynamics. They found strict patrilineal descent systems, female exogamy, and levirate unions, suggesting females played a key role in promoting community cohesion.
A team of researchers has identified a single nucleotide change in the TBX1 gene that affects skull base development, contributing to human's unique brain size. This variation is associated with lower TBX1 expression levels in humans compared to extinct hominins, leading to distinct changes in cranial morphology.
Research reveals specific lipids accumulate in tissues as we age and can be decreased through exercise, according to a recent study published in Nature Aging. The findings suggest that exercise may have a role in reversing age-related changes in human muscle tissue.
Scientists have discovered genetic variants in BSN and APBA1 genes linked to adult-onset obesity, type 2 diabetes, and fatty liver disease. These variants are associated with a significant increase in obesity risk, highlighting a new biological mechanism for the condition.
Research at the University of Gothenburg reveals a link between maternal protein intake during pregnancy and the formation of facial bone structures in offspring. The study found that a particular signaling pathway, mTOR, plays a crucial role in shaping the face.
Researchers have recovered ancient microbiomes from 4,000-year-old teeth in Ireland, revealing major changes in oral microenvironments. The study identified bacteria linked to gum disease and provided the first high-quality ancient genome of Streptococcus mutans, a major culprit behind tooth decay.
A new analysis published in Andrology found a higher genetic susceptibility to leisure computer usage was associated with a greater risk of erectile dysfunction in men. Each 1.2 hour increase in leisure computer usage predicted a 3.57-fold greater odds of erectile dysfunction.
A study led by Leopold Eckhart found that the genetic programme controlling keratinized claws originated in a common ancestor of humans and frogs. The research team used the tropical clawed frog as an experimental model and discovered that important hair components, including keratins, share similarities with human hair.
A new study from the University of Chicago analyzed DNA methylation in tissue samples from former smokers, finding evidence of the body's attempts to defend itself from tobacco smoke. The research team identified new regions associated with smoking and found that DNA methylation varies dramatically across cell types and tissue types.
Researchers have characterized the rapid series of events transforming a fertilized cell into a living being, highlighting rapid changes in genetic activity post-birth. The study's findings underscore the speed at which newborns must adapt to extrauterine life and offer insights into long-term physiology and health outcomes.
The study of ancient genomes has shed light on the evolution of modern humans, revealing genetic changes that distinguish us from Neanderthals and Denisovans. These findings suggest that population-level advantages, such as increased connectivity and access to resources, played a significant role in shaping human migration patterns.
A new perspective article suggests that integrating environmental effects into genetic research is crucial to understand the intricate nature of gene-environment interactions. The authors propose expanding genome-wide association studies by incorporating environmental data, which could help mitigate deterministic thinking in genetics.
A new study from Uppsala University found that Stone Age hunter-gatherer communities in Western Europe deliberately formed distinct families to avoid inbreeding and maintain genetic diversity. The research analyzed the genomes of several individuals buried at iconic sites in France, dating back to around 6,700 years ago.
A team of researchers from Wayne State University and the Barbara Ann Karmanos Cancer Institute have received a five-year, $9.6 million grant to improve the identification and clinical management of hereditary and multiple primary cancers in African Americans. The study aims to overcome barriers to genetic testing in this population.
Researchers identified six ancient individuals with an extra copy of Chromosome 21 and another with three copies of Chromosome 18, indicating care and appreciation from their communities. These findings suggest that children with Down Syndrome and Edwards Syndrome were not stigmatized but rather recognized as part of their societies.
A new study found that genetic factors contribute around 33% to the variation in levels of trust among individuals, while life circumstances such as age, health, and relationship status also increase trust. The research used twin studies to disentangle genetic and environmental influences on trust.
Researchers found that parents' manifestation of neurodevelopmental and psychiatric traits can predict the prevalence and severity of disorders in children. The study analyzed 97,000 families and revealed a correlation between parental traits, suggesting that assortative mating may contribute to increased disease severity.
A new study reveals a larger number of transposable elements in the human genome than previously known, shedding light on their potential role in human diseases. The 'genomic time machine' approach allowed researchers to identify degenerate TEs that were missed in previous studies.
A new statistical model developed by UChicago researchers accurately identifies causal genes and variants for a disease. The tool reduces false positives and takes into account multiple genes and variants, leading to the discovery of 35 putative causal genes for LDL cholesterol levels.
Genetic material from Neanderthal ancestors may have influenced the preference for waking up early in some people. Studies found that introgressed genetic variants from Neanderthals are associated with increased morningness and a shorter circadian period, which is beneficial at higher latitudes.
The international consensus report on precision diabetes medicine highlights significant advancements in prevention, diagnosis, treatment, and prognosis. The report also sheds light on knowledge gaps and provides a framework for future research.
Researchers have successfully converted human retinal cells, specifically Muller glia, into neurons in a lab setting using an artificial fish-like genetic program. This breakthrough could potentially serve as a new source of neurons to treat vision loss caused by disease or trauma.
A study at Uppsala University found that infant face preference is influenced by genes and linked to later language development. The researchers analyzed over 500 infant twins and found that individual infants' preferences for faces could be largely explained by their genetics.
A new study found that the progeny of successive generations of old parents had significantly shorter lifespans than those from young parents in both Drosophila melanogaster and Caenorhabditis elegans. The researchers also discovered that switching to only one generation of younger parents improved the healthspan of the offspring.
Researchers analyzed genes and brain tissue of patients with Alzheimer's disease to find sex-specific differences in immune function, cellular metabolism, and communication between brain cells. The study suggests that these differences contribute to women's increased risk for the disease and its severity.
A qualitative study by City of Hope highlights the importance of proper patient preparation for unanticipated, inheritable genetic findings prior to tumor sequencing. The research emphasizes the need for scalable educational interventions that facilitate informed consent, such as online tools and applications.