All articles tagged with #genomics
A new genomic review suggests the ancestors of modern Indigenous peoples arrived in the Americas no earlier than 21,000 years ago, during the Last Glacial Maximum. While this aligns with some archaeological data, significant gaps in ancient DNA samples and conflicting interpretations of older sites like White Sands keep the debate open.
Researchers at Memorial Sloan Kettering Cancer Center (MSK) have identified a built-in structural vulnerability in extrachromosomal DNA (ecDNA), a circular genetic material found in roughly one in six human cancers. The study, published in Nature, reveals that repetitive TA sequences in ecDNA are prone to breaking, forcing cancer cells to rely on specific repair proteins to maintain stability. Disrupting these repair mechanisms destabilizes the DNA circles, offering a potential new therapeutic avenue to combat treatment-resistant tumors.
A new review in Science argues that X and Y chromosomes directly influence immunity, cancer, and aging, independent of sex hormones. Researchers found that loss of the Y chromosome in men is linked to cancer and heart disease, while X chromosome dynamics in women affect brain aging. The study suggests these genetic factors should shape clinical trial design and personalized treatments.
A massive new study published in Nature has created a population-scale atlas of the human immune system, linking genetic variants to disease mechanisms. By analyzing 10 million blood cells from 1,108 Finnish donors, researchers identified over 51,000 expression quantitative trait loci (eQTLs) and 338,000 chromatin accessibility QTLs. The study reveals how genetic variations in non-coding regions regulate gene expression, providing a clearer understanding of autoimmune diseases. This resource offers testable hypotheses for more than half of known immune disease associations, potentially accelerating drug discovery and personalized medicine.
Cathy Tie, CEO of New York-based Origin Genomics, is testing AI-assisted gene editors on human embryos to prevent inherited diseases like familial adenomatous polyposis. While the company aims to prove safety to eventually lift U.S. legal bans on embryo editing, critics warn of 'designer babies' and unregulated overseas clinics. Tie argues that pursuing this technology is ethical given the suffering of affected families, despite current prohibitions and safety concerns.
A massive international study published in Nature concludes that bats originated in Europe approximately 65 million years ago, overturning previous theories that placed their origins in Africa, Asia, or North America. By analyzing 103 bat genomes and 44 fossils, researchers determined that key traits like flight and echolocation evolved early in bat history. The findings provide a new framework for understanding bat disease resistance and longevity, which could inform human medical research, while highlighting the urgent need to conserve these ecologically vital mammals.
Researchers have published a comprehensive map of gene activity in the human prefrontal cortex, analyzing over 6.3 million cells from 1,494 deceased donors. This detailed atlas, developed through nine studies, identifies molecular changes associated with aging and disorders like Alzheimer's, Parkinson's, and schizophrenia. By pinpointing specific cell types and biological processes affected by these conditions, the research aims to accelerate the development of targeted therapies and distinguish normal aging from disease-related decline.
A coordinated series of nine studies led by the PsychAD Consortium has produced a comprehensive, cell-type-resolved map of genetic risk for major brain disorders. By analyzing over 6 million nuclei from 1,494 donors, researchers identified thousands of gene-trait associations previously missed by bulk tissue analyses. The findings reveal that disorders like Alzheimer’s and schizophrenia share common molecular pathways but exhibit distinct cellular signatures, offering new targets for precision medicine.
A massive international study has rewritten the evolutionary history of bats, concluding that they originated in Europe approximately 65 million years ago, not in Asia, Africa, or North America as previously hypothesized. Published in Nature, the research analyzed 103 bat genomes and 44 fossils to resolve long-standing debates about the timing of flight and echolocation. The findings suggest these key traits evolved early in bat history, around 50 million years ago, rather than appearing multiple times as bats diversified. This new phylogenetic tree provides a foundation for understanding bat disease resistance and longevity, which could inform human medical research.
Researchers have published the first comprehensive single-nucleus transcriptomic atlas of the human dorsolateral prefrontal cortex (DLPFC) spanning the entire lifespan. By analyzing over 1.3 million nuclei from 284 neurotypical donors, the study reveals that brain aging is not a linear decline but a non-linear process with distinct phases. The atlas identifies a transition from early-life neuronal resilience to late-life glial immune activation and circadian disruption, providing a new framework for understanding age-related cognitive decline and disease risk.
London-based AI startup Basecamp Research has secured a $140 million Series C funding round led by S32, with participation from Nvidia, Anthropic’s Anthology Fund, and the NATO Innovation Fund. The capital will support the expansion of its EDEN AI models, which analyze genetic data from diverse global ecosystems to design antibiotics and gene therapies. The company aims to move its six therapeutic candidates from lead optimization toward clinical trials, focusing on in vivo cell therapies and antimicrobial peptides.
A massive international study has compiled the largest-ever bat genomic and fossil database, revealing that bats likely originated in Europe 65 million years ago. The research aims to decode the genetic mechanisms behind bat longevity and viral resistance, potentially offering insights for human health and aging.
A massive international study published in Nature concludes that bats originated in Europe approximately 65 million years ago, overturning previous theories that placed their origins in Asia, Africa, or North America. The research, part of the Bat1K project, analyzed 103 living species and 44 fossils to reveal that echolocation evolved early in bat history. This genomic database aims to unlock secrets behind bat longevity and disease resistance, though funding challenges and fossil gaps remain.
Whole-genome analysis reveals that what was once considered a single gentoo penguin species actually comprises four distinct species, including a newly identified southeastern gentoo on the Kerguelen Islands, with climate-change projections suggesting many island populations could lose suitable habitat by 2050, raising conservation concerns.
A genome-wide study of 47 Beefalo semen samples from founding lines shows 39 animals have no detectable bison ancestry, calling into question the breed standard of three-eighths bison; the eight with bison DNA show only 2–18% ancestry. The analysis also reveals widespread zebu ancestry in 38 of the animals, including Joe’s Pride, which was recorded as over a third bison. The researchers suggest zebu introgression may have shaped the breed’s appearance and that backcrossing patterns explain how bison DNA could appear in a largely taurine/cattle background. Using preserved germplasm and multiple genomic approaches, the study provides a genomic audit that pedigrees alone could not reliably establish the breed’s composition.