Articles tagged with Human Genetics
A panel of experts discusses the potential risks and benefits of human genome editing for embryos, including cosmetic choices and long-term implications. They propose a balanced regulatory approach to oversee the technology.
Researchers analyzed genetic sequences of the virus and found specific mutations that occurred as it crossed the Pacific Ocean, suggesting new hypotheses for its association with microcephaly and GBS. The analysis also revealed potential relationships between viral infection and severe symptoms in adults and infants.
Genetic analysis of ancient DNA reveals that the evolution of smallpox occurred far more recently than previously believed, with all available strains having an ancestor no older than 1580. Researchers found two circulating strains of the virus, variola major and minor, after English physician Edward Jenner developed a vaccine in 1796.
A Chinese research group found that the Tibetan Mastiff's high-altitude adaptation is due to interbreeding with the Tibet grey wolf, introducing a DNA swap at two genomic hotspots. This process shares similarities with human evolution, highlighting ancient interbreeding as a key factor in adaptations.
The Cell Atlas is an open-access interactive database displaying high-resolution images of more than 12,000 proteins in cells. It provides spatial information on protein expression patterns at a fine subcellular level, revealing complex cellular architectures and single-cell variation.
Human cells produce RNAi molecules in response to influenza A virus infection, but a viral protein blocks this process. The study suggests that RNAi may also be active against Ebola, Marburg, and other RNA viruses.
A recent study published in Frontiers in Behavioral Neuroscience has found that mice with a genetic mutation similar to the one affecting human speech also have difficulty producing complex vocal patterns. The study suggests that the FOXP2 gene regulates not only human speech but also mouse vocal communication.
Researchers induced oxidative stress in cultured RPE cells to explore the development of age-related macular degeneration (AMD). Oxidative stress led to cell senescence and proliferation inhibition, highlighting its potential role in AMD progression. The study suggests antioxidants may be a new treatment approach for AMD intervention.
A new study in Science says climate change is impacting every aspect of life on Earth, including genes and entire ecosystems. The study found 80% of 94 ecological processes show signs of distress due to climate change.
A new study reveals that Neanderthal genes are being removed from the human genome at a rate of weak but widespread selection. The researchers found that the small population of Neanderthals mixing with modern humans led to inbreeding, causing genetic variants to persist and then be weeded out by natural selection.
A study published in PLOS Genetics found that natural selection removed weakly deleterious Neanderthal gene variants from the human genome, as they were more effective in larger human populations. This loss of Neanderthal ancestry is attributed to historical differences in population sizes between humans and Neanderthals.
Researchers have developed two new mouse models of amyotrophic lateral sclerosis (ALS) that exhibit protein clumping and display clinical features seen in patients. The models may help scientists better understand the disease and develop new treatments.
Researchers found patterns by which gut microbiome and its function interact with immune response, influencing cytokine production. The study identified interactions between pathogens, cytokines, and fatty acids on cytokine production.
A team of researchers discovered that a specific mutation in the telomere protein TPP1 causes an incurable premature aging disease called dyskeratosis congenita. The mutation compromises telomerase function, leading to stem cell division slowdowns and tissue breakdown. This breakthrough provides a potential drug target for the disease.
The study reveals a striking pattern of genome duplication in the African clawed frog, which arose through interspecific hybridizations between 15-20 million years ago. The research has significant implications for understanding human conditions and diseases, as well as applications in regenerative therapy.
A new whole-genome analysis reveals that chimpanzees and bonobos had a historical genetic flow, which sheds light on processes that may have played a recurring role in great ape evolution. The study found evidence of gene flow between the two species between 200-550 thousand years ago.
The study found that 1% of chimpanzee genomes are derived from bonobos, indicating gene flow events between the species. This discovery has strong implications for chimpanzee conservation, enabling researchers to locate individual chimpanzees by their geographic origin.
Researchers will analyze tissue samples from baboons to identify molecular mechanisms underlying early onset atherosclerosis. The study may lead to the development of early diagnostics and interventions, potentially saving millions of lives by treating the disease in its early stages.
Researchers discovered that cytomegalovirus (CMV) hijacks the molecular machinery in human cells to survive and replicate, relying on the human protein CPEB1. Suppressing CPEB1 levels during CMV infection reverses harmful cellular changes and reduces viral production tenfold.
A study published in Journal of Anatomy found a connection between certain bat species and humans with cleft lip and palate. Researchers used anatomical dissection, micro CT scans, and genomic analysis to identify the genetic causes of clefts.
A new estimator developed by geneticists suggests that the population in Africa was likely 50% larger than previously thought and that an archaic-modern human separation date of 440,000 years ago is the best fit. The study also found that ancient populations interbred less than previously believed throughout Eurasia.
Researchers discovered that Zika virus infection leads to modifications of both viral and human genetic material, including the addition of methyl groups. This alteration affects viral replication and the human immune response, highlighting the importance of methylation in vaccine and therapy development.
New research reveals that human transport has a significant impact on the genetics of marine species, disrupting natural patterns and leading to unexpected consequences. The study found a mosaic of genetic patterns in a native invertebrate species, suggesting that anthropogenic activities are altering genetic composition in native ranges.
Researchers found that the cutting of tau by caspase-2 may play a critical role in the disordered brain circuit function of tauopathies. Blocking caspase-2 activity restored some learning and memory deficits in animal models, suggesting reversible cognitive loss.
The study highlights the risks of human presence on endangered ape populations, including disease transmission and habitat destruction. To mitigate these threats, Schultz proposes improving protocols and regulations for ecotourism and promoting understanding of interspecies disease transmission as a conservation threat.
The Fonni's Dog genome study sheds light on the history of Sardinia's fiercely protective canine breed, tracing its development through unregulated selection for behavior. The research also highlights the potential of isolated dog breeds as a powerful resource for finding genes that influence health and behavior.
Researchers removed single neurons from fruit fly embryos to gain insight into gene expression control in developing brain networks. The study identified B52, a protein linked to acetylcholine production, and its disruption may cause severe mental problems.
The tarsier genome analysis confirms that tarsiers belong to the dry-nosed primate category, sharing recent transposon families with humans and bushbabies. The study also identified 192 genes linked to the tarsiers' unique traits, which may be associated with human diseases.
Einstein researchers conclude that the maximum human lifespan has already been reached at 115 years, with a possible limit of 125 years. This finding suggests that further advances in medicine may not extend human lifespan beyond this point.
The UT Southwestern Medical Center has transferred nearly 175,000 induced germline mouse mutations to the NIH-supported Mutant Mouse Resource and Research Centers, significantly increasing their availability for researchers worldwide. These mutations are critical for supporting genetic research in all mammals, including humans.
Fruit fly research sheds light on human diabetes, revealing insulin signaling mechanisms and potential new treatments for the disease. The study's findings have implications for understanding and addressing type 2 diabetes.
A recent archaeological analysis has found that early settlers of Tonga and Vanuatu originated from Melanesia, challenging the long-held assumption about the colonization of the region. The research team's findings point to a previously unknown migration wave from the Solomon Islands chain.
Scientists at CNIO deconstructed alternative splicing as a source of protein production, finding it secondary to gene dominance. The study reveals that most human genes produce a single dominant protein, calling for rethinking biological innovation.
Researchers found that genetic clustering of southern African populations is closely tied to the ecogeography of the Kalahari Desert region. The study analyzed genome-wide data from 21 KhoeSan groups and identified five primary ancestries, suggesting a geographically complex set of migration events.
A landmark twin study has identified moderate to strong genetic contributions to the volume of cortical and subcortical brain structures in people over 65. The research found that specific brain regions, such as the hippocampus, have high genetic influences, while others show unique genetic determinants.
A Case Western Reserve University researcher proposes a framework to address ethical questions surrounding potentially revolutionary research on part-human, part-animal embryos. The researcher suggests prioritizing animal welfare while enabling scientific progress in areas of biomedical importance.
A recent study reconstructs the history of human migration to the Tibetan Plateau and discusses possible mechanisms involved. Humans first arrived in the Northeastern Tibetan Plateau from the adjacent Western Loess Plateau via the He-Huang Valley, spreading southwards over four stages.
Researchers developed a non-invasive MRI-based method to quantify dermal fat, total WAT volume and BAT activation in mice and humans. Studies showed that dWAT thickness was highly variable between subjects and increased in genetically obese mice and those fed high-fat diets.
Researchers devise a way to record analog memories in human cells by using CRISPR and self-targeting guide RNA strands. This allows them to track biological events such as inflammation or infection and monitor cell differentiation into various tissues during development.
Scientists have engineered Geobacter bacteria to produce extremely thin nanowires that are thousands of times thinner than a human hair, and are made from non-toxic natural proteins. The resulting wires can be used in medical sensors, military applications, and other electronic devices.
Researchers identified GALNT2 gene as a regulator of HDL-C levels through its effects on phospholipid transfer protein (PLTP) function. The study found that humans, mice, and rats lacking GALNT2 had low HDL levels compared to models with normal GALNT2 function.
Researchers at MDI Biological Laboratory decipher genetic code controlling limb regeneration in zebrafish, axolotl, and bichir, revealing common genetic regulators. The discovery may lead to new therapies for wound healing and prosthetic device development, but a timeline for regrowing limbs remains uncertain due to funding constraints.
Researchers identified 930 genes associated with excessive drinking behavior in genetically diverse rats, indicating a complex trait influenced by many genes and the environment. The study confirmed previously linked genes and uncovered new genetic pathways, some of which could be targets for treatment.
A study published in PLOS Genetics has identified hundreds of genes associated with alcohol preference in rats, suggesting a strong genetic component to alcoholism. The research found that critical regulatory pathways involving several genes were crucial in regulating the desire to drink alcohol.
A genetic mutation in modern humans may have allowed them to effectively process toxic compounds produced by fires, potentially giving them an evolutionary edge. This mutation is thought to be linked to the aryl hydrocarbon receptor and may have helped humans adapt to environmental toxin exposures.
Research reveals green monkeys in The Gambia acquired S. aureus strains from humans, with most recent transmissions occurring three decades and seven years ago. Strains that jumped between species lost genes for human adaptation.
Researchers found that green monkeys in The Gambia acquired Staphylococcus aureus strains from humans through contact with contaminated food. The bacteria adaptation process was observed as strains lost genes associated with human adaptation, highlighting the risk of pathogen transmission.
The Human SRMAtlas provides highly specific mass spectrometry assays for targeted identification and reproducible quantification of any human protein. This resource enables the measurement of 99.7% of the annotated human proteins, revolutionizing systems-level understanding of physiology and disease.
Researchers reveal that unusual DNA repeat elements on inactive X chromosomes are crucial for maintaining the three-dimensional structure of this female-specific genetic phenomenon. The study uses genome engineering techniques to demonstrate the importance of these repeats, opening a new era of genomics research.
Researchers at Duke University used fast-changing mouse lemur DNA to paint a picture of Madagascar's forested past. The study suggests that the island was not as tree-covered as previously thought, with grasslands and woodlands dominating the center of the island before human arrival.
Scientists have discovered that zebrafish are susceptible to arthritis, mirroring the condition in humans and other mammals. The study uses zebrafish as a model to accelerate therapeutic research into preventing or easing osteoarthritis.
Researchers have found that chromatin remodeling proteins, essential for DNA replication and gene expression, are frequently mutated in human cancers. These mutations indicate tumor suppressive functions, making chromatin remodelers promising new targets for targeted cancer therapy.
Scientists have discovered two new strains of the HTLV-4 virus in hunters bitten by gorillas in Gabon, supporting the notion that gorillas are a major source of infectious agents. The findings suggest that gorilla bites can lead to chronic persistence of the virus in humans.
Researchers created super-sniffer mice using transgenic technology to study human odor receptors, which could lead to land mine detection and novel disease sensors. The mice were able to detect a specific odor two orders of magnitude lower than non-super sniffer mice.
Researchers have developed a cost-effective method to identify genes associated with complex traits in mice, including 66 different physical and behavioral characteristics. The technique, which uses genotype-by-sequencing and RNA sequencing, has identified two novel genes linked to methamphetamine sensitivity and anxiety-like behavior.
A new artificial intelligence system called ALPHA has been developed by Psibernetix, Inc., which consistently outperforms human experts in simulated air combat. ALPHA's ability to process vast amounts of sensor data and make tactical decisions in milliseconds makes it a formidable opponent, even when its aircraft are handicapped.
A global study has identified four genetically distinct populations of Plasmodium vivax, the parasite responsible for debilitating forms of malaria. The findings provide insights into the movement and adaptation of P. vivax over time, suggesting regional variations in mosquito transmission and human infection.
Researchers have identified 16 distinct neuronal subtypes in the human cerebral cortex, revealing a surprising diversity in gene expression. This discovery provides insights into brain function and may shed light on diseases such as Alzheimer's and Parkinson's.
Researcher Erika Geisbrecht is studying the connection between a gene called clueless (clu) and genes that cause Parkinson's disease in fruit flies. She aims to understand how muscles develop and maintain themselves throughout a fruit fly's life to apply this knowledge to humans.
A study published in PNAS found that high-altitude Himalayan populations have a remarkably stable genetic make-up despite cultural transitions and outside population exposure. The analysis suggests that these populations originated from East Asia, with genetic stability maintaining across millennia.