Articles tagged with Human Genetics
A highly detailed model of mouse brain connections may provide new insights into mental illnesses such as depression and schizophrenia. The study used diffusion MRI scans to create a 3D digital map of the brain's circuitry, exceeding previous resolution by 1,000 times.
An international research team has identified a novel gene, EN1, associated with osteoporosis and bone mineral density. The study used extensive genetic data from the UK10K project to uncover a genetic variant near EN1 with the strongest effect on BMD and fracture.
Researchers from UC Davis developed a novel sensor coating material using nanoporous gold to detect nucleic acids in complex biological samples. The method enables sensitive detection of DNA without requiring purification, enabling faster and more efficient process for field applications.
Scientists from Karolinska Institutet have identified 32 genes that are switched on within two days of fertilization, marking a significant breakthrough in understanding early embryonic development. The study's findings also reveal the importance of 'junk DNA' in regulating gene expression.
A research team used ancient-DNA analysis and radiocarbon dating to reconstruct population histories for prehistoric seabirds in New Zealand. They found that mainland populations were rapidly decimated after human arrival, while Stewart Island populations remained relatively stable due to a decline in human numbers.
Research found that oysters serve as a major reservoir for noroviruses, with over 80% of human norovirus genotypes detected in oyster samples. This highlights the importance of surveillance and safe handling of oysters to prevent transmission.
Scientists have identified 18 proteins crucial to the transformation of fungal spores into disease-causing yeast, offering hope for preventative treatments. By blocking these proteins, researchers aim to prevent the spread of meningitis and other fungal diseases.
A University of Queensland scientist cautions against shark culling, citing challenges in managing populations and predicting long-term ecological impact. The expert's research uses DNA analysis to estimate shark numbers and predict population trends.
Researchers at MIT and Harvard Medical School discovered a new pathway that controls human metabolism by prompting adipocytes to store or burn fat. The study identified two master controllers of thermogenesis, IRX3 and IRX5, which turn off fat storage genes and restore energy balance.
Researchers found that lager yeast, used in 94% of beer production, originated from the accidental hybridization of Saccharomyces cerevisiae and S. eubayanus yeasts around 500 years ago. The study reveals how these natural processes led to the development of a yeast that could thrive in cold temperatures.
Researchers at the University of Basel used computational models to describe human memory processes for the first time. The study identified specific genetic profiles underlying distinct mental processes, such as learning and memory storage.
Researchers find daily changes in specific brain neurons help regulate biological clocks and aid transitions to different seasons. The study identifies a protein driving these rhythms, Rho1, and highlights its connection to spinocerebellar ataxia.
Researchers have identified two gene variants on chromosomes 15 and 8 associated with earlier- or later-than-expected symptom onset in Huntington's disease patients. The findings suggest that these variants may influence the disease process prior to symptoms appear, offering new potential therapeutic strategies.
Scientists at Van Andel Research Institute have unraveled the molecular mechanism of TOPLESS, a plant protein that interacts with other molecules to regulate gene silencing. This discovery provides insights into similar pathways in humans and has significant implications for understanding diseases such as cancer.
A new study using ancient DNA and paleoclimate data found that rapid warming events played a greater role in the extinction of megafauna than human activity. The researchers analyzed DNA records over 50,000 years and compared them to climate event records from Greenland ice cores.
A 13-year study found that humans are the biggest threat to Southern California mountain lions, causing over half of known deaths. The population's declining genetic diversity is exacerbated by an interstate highway that bisects their habitat.
A UGA study found that salmonella levels in freshwater sources across Georgia pose a significant risk to human health. The research team discovered that strains of salmonella exhibit geographic trends, with higher rates found in south Georgia and wildlife carriers like raccoons and opossums contributing to the problem.
Researchers at MIT have created sensors, memory switches, and circuits that can be encoded in the common human gut bacterium Bacteroides thetaiotaomicron. These basic computing elements will allow the bacteria to sense, memorize, and respond to signals in the gut.
A new checkpoint enzyme, Plk1, has been discovered to play a crucial role in monitoring chromosome segregation during cell division. This finding may provide important clues for the development of new cancer treatments.
A team of scientists studied the genetic basis of human olfaction and reconstructed the sensory world of our distant ancestors. They found that different populations have varying abilities to detect specific smells, with some populations being more sensitive than others.
A team of researchers has discovered a link between acute liver failure and mutations in the NBAS gene, which affects cellular transport processes. The study found that these mutations can disrupt protein packing and transport within cells, leading to metabolic imbalances in the liver.
Researchers found that up to 20% of a mosquito population's genome is subject to evolutionary pressures, leading to local adaptation and potential resistance to pesticides. The study provides insights into the contemporary evolution of mosquitoes and informs strategies to control populations.
Researchers analyzed DNA from a 40,000-year-old jawbone from Romania and found that six to nine percent of the person's genome came from Neandertals. This shows that some of the first modern humans in Europe mixed with local Neandertals around this time.
Researchers at UT Austin found a surprising link between cross-shaped DNA structures and human cancer, with small cruciforms enabling mutations that increase cancer risk. High-performance computing helped identify hotspots of genetic instability in cancer genomes.
A survey of 34 couples found that those with siblings from the same donor preferred to use the same donor for subsequent conceptions due to a desire for genetic bonds and improved sibling relations. However, some couples prioritized the genetic link between mother and child over full sibling relationships.
Researchers have identified a gene, PRDM8, linked to early loss of night vision in animal models. Gene therapy for Leber's congenital amaurosis shows promising results, but temporary improvements are seen.
A new study reveals that clinical and genetic factors affecting warfarin dose vary by race, highlighting the need for race-specific dosing equations to improve anticoagulation control. The research team found that gene variants may have different effects on dose across racial groups, particularly among African Americans.
The study, published in the American Journal of Human Genetics, used 225 human genome sequences from Egyptians and Ethiopians to determine the most likely route of human migration out of Africa. The research found that Egypt was the primary gateway for humans migrating north, supporting a northern route rather than a southern one.
Scientists have identified a gene variant in wild chimpanzees that encodes an HIV-fighting protein, suggesting that hominids have been fighting off HIV-like viruses for at least five million years. The discovery could yield insights into biological and pharmaceutical applications to enhance HIV-infected people's survival.
Researchers found four essential genes that were lost from the human Y chromosome but relocated to other chromosomes, including one gene crucial for sperm production. These findings suggest a complex role of sex chromosomes in genetic function and may contribute to male infertility.
New research from Griffith University uncovers significant genetic changes in receptors associated with immunological and cellular function, potentially shedding light on CFS/ME. The findings contribute to a deeper understanding of the complex illness's pathology.
A new population genetics model reveals a previously unknown bottleneck in the Finnish population between 10,000 to 20,000 years ago. This event likely reduced the population size significantly and resulted in fewer genetic differences among its offspring.
UTHealth researchers have sequenced exomes of 8,554 individuals to identify naturally occurring mutations that inactivate certain genes. The study found eight new relationships between genes and diseases, including a link between TXNDC5 and Type 1 Diabetes progression.
A recent study has identified a correlation between human head size, pelvis shape and childbirth difficulties. The research found that women with larger heads tend to have shorter birth canals, which may ease the obstetric dilemma.
Researchers at Ghent University discovered that sweet potatoes contain genes from the bacterium Agrobacterium, which were likely introduced through horizontal gene transfer. The findings suggest that genetic modification also occurs in nature, and could have implications for our understanding of plant evolution.
A study of 647,457 patients on chronic dialysis found that genetically related family members have a 70% increased risk of cardiac arrest compared to unrelated patients. This increased risk is attributed to inherited genetic factors, which may contribute to the high mortality rate among dialysis patients.
MGN1703 is a single-stranded oligonucleotide-based drug that activates the human immune system without causing harmful side effects. It works by binding to toll-like receptor 9, triggering a cascade of signaling pathways that enable recognition and destruction of foreign cells.
Dwarf lemurs' ability to put their bodies in standby mode, known as torpor, correlates with increased longevity. Hibernating lemurs live up to ten years longer than non-hibernators, staying healthier and reproducing for a longer period.
A new study by Karolinska Institutet researchers found that the language used to switch genes on and off has remained conserved across millions of years of evolution. The differences between species reside in the content and length of these instructions, with specific transcription factors recognizing unique DNA words.
Researchers at the University of Illinois discovered that the hermaphrodite version of the papaya plant, essential for commercial fruit production, arose from human selection by the ancient Maya around 4,000 years ago. This genetic study could lead to the development of a new, more efficient papaya variety.
Research published in Genome Biology found that humans and other animals have acquired 'foreign' genes from microorganisms, suggesting ongoing gene transfer. The study identified 17 previously-reported genes and 128 additional foreign genes in the human genome, related to metabolism, immune responses, and more.
A McGill University team has identified a mechanism by which environmental factors influence the expression of genes controlling complex traits. By manipulating DNA methylation levels, researchers were able to create variation in worker ant sizes, shedding light on the interplay between genetics and environment in shaping these traits.
A new method called TFUMseq enables researchers to study the functions of hard-to-grow bacteria that contribute to the gut microbiome. The tool allows for the identification of genes that enhance microbial fitness and provides insights into how bacteria colonize living organisms.
Scientists have made a breakthrough in treating patients with sickle cell disease by engineering custom blood cells that can evade the immune system. Lab-grown stem cells were reprogrammed and edited using CRISPR to replace the defective gene, resulting in healthy red blood cells that function just as well as those from unaffected donors.
Researchers have assembled a comprehensive map of the human epigenome, detailing epigenetic markers in 111 cell types and tissues. This resource will aid in understanding the molecular basis of disease and lead to new treatments.
Researchers found that segments of human genome with low recombination rate carry a higher proportion of disease-enabling genetic mutations, which are eventually shuffled off through sexual reproduction. This discovery can help scientists identify and develop effective treatments for diseases.
Researchers discovered that the immune system can turn off cellular enzymes needed by the Influenza A virus, which could lead to new treatments for flu. The study found that PAI-1 protein plays a key role in this process, and its inhibitors may be used to combat viral infections.
Research found that humans have fewer endogenous retroviruses than other animals, likely due to reduced blood contact. This decrease could be attributed to human evolution using tools instead of biting during conflicts.
A new study by the University of Sheffield found that genetic differences between humans continue to fuel evolution, despite artificial influences like easy access to contraception and medical advances. The research showed that genetic influence on timing of reproduction and family size tends to be higher in recent times.
Researchers at USC discovered a compound that extends the life span of female fruit flies by 68%, challenging existing methods used to study genetic causes of aging. The finding opens up new avenues for investigating longevity and identifies potential candidate genes and mechanisms.
A new study found that humans carry fewer endogenous retroviruses in their genomes compared to other mammals. This decrease may be attributed to a less bloody evolutionary history, with reduced exposure to blood-borne viruses as humans transitioned from biting during conflicts and hunting.
A fossil skull discovered in Israel's Manot Cave provides strong evidence of the first modern human migration to Europe, dating back 55,000 years. The analysis reveals a close genetic relationship between ancient Europeans and modern humans from Africa, challenging previous theories about the origins of European modern humans.
WSU researchers found a direct link between BPA and estradiol's effects on sperm production, disrupting DNA interactions needed for creation. This discovery bolsters the estrogen hypothesis and suggests that endocrine disruptors like BPA impair reproduction.
A new computational method can identify positions in the human genome that play a role in cell function, revealing insights into genetic regulation and potential applications in personalized medicine. The study found that 4.2 to 7.5 percent of nucleotides in the human genome have influenced fitness since humans diverged from chimpanzees.
Researchers have created DNA-coated nanoparticles that can hold together 3D-printed materials, forming gel-like substances suitable for human cell growth. This breakthrough could lead to the development of scaffolds for growing tissues and organs.
A recent study by Ria Ghai has identified three genetically distinct groups of whipworms, with only one being transmissible between humans and non-human primates. This discovery has significant public health implications and highlights the need for conservation efforts to protect endangered species.
Resistin, an immune protein found in human serum, instigates an inappropriate inflammatory response to worm infections, impairing clearance. Targeting this pathway with drugs or antibodies could lead to new therapeutic strategies for worm infections and associated pathology.
Researchers have discovered new genetic and epigenetic factors that contribute to diabetes, suggesting a shared pathway between genes and environment. The study found similar epigenetic changes in fat cells of obese mice and humans, highlighting the consilience of genetics and environment.
Researchers found that swamp sparrows can perceive sound categories in context, a skill shared with humans. This ability may be crucial for understanding how human language arose.
Researchers have discovered a mutation in ferrets that shares similarities with humans, potentially leading to improved therapies for influenza and other diseases. This finding opens up a novel approach to tackling human diseases.