Articles tagged with Human Genetics
A study has found that a specific gene linked to brain development in humans differs dramatically from its counterpart in chimpanzees. The gene, called HAR1, has undergone significant changes over the past five million years, with 18 of its 118 letters changing between humans and chimps.
A recent study published in Cell reveals that mice have two proteins working together to protect chromosome ends, suggesting rapid evolution. The findings identify the distinct functions of POT1a and POT1b proteins, which could impact human telomere biology.
Researchers found that genetic instructions for constructing and positioning human limbs originated from ancient fish ancestors around 100 million years ago. They isolated genes from the spotted catshark and discovered a shared developmental mechanism between median fin development and limb formation.
Australian researchers identified a new protein in human airway epithelial cells that regulates allergic airway inflammation. A study suggests the protein aP2 plays an essential role in both type 2 diabetes and allergic airway diseases like asthma.
Researchers at Cold Spring Harbor Laboratory have identified two human genes, Yap and cIAP1, that contribute to liver cancer. The study reveals these proteins are overexpressed in both mouse and human tumors, suggesting they could be targeted for novel cancer therapies.
Researchers have identified three variations of a human gene, SP110, associated with tuberculosis susceptibility. The variants were found to be linked to increased risk of developing the active disease in humans, building on previous research that linked a similar gene, Ipr1, in mice.
Researchers studied kuru, a prion disease epidemic caused by cannibalism, and found minimum incubation periods ranging from 34 to 41 years. The study suggests BSE infection incubation period could be even longer due to species-barrier effects and genetic variation associated with extended incubation periods.
The NIH has launched an effort to make more knockout mouse models widely accessible to the biomedical research community. The initiative aims to deposit existing knockout mouse lines into public repositories, increasing their availability and accelerating the development of new strategies for understanding and treating human disease.
A comprehensive literature-derived database of yeast interactions has been created, containing over 22,000 protein interactions and 11,000 genetic interactions. The database is publicly available and enables researchers to gain further insight into individual gene functions and biological network features in yeast.
A team of researchers led by UB microbiologist Steven R. Gill analyzed the DNA of microbes in the human distal gut using metagenomics. The study found significant differences between two microbial communities from healthy individuals, highlighting the importance of understanding the interactions between human and microbial genomes.
A new study from the University of Wisconsin-Madison found that a negative energy balance, induced by exercise and lower body weight, inhibits the growth of polyps in mice. The researchers also discovered that exercising mice had fewer polyps and less body fat compared to non-exercising mice.
Researchers found that in mice, proteins Rb and p107 compensate for each other in retinal progenitor cells, preventing deregulated proliferation that leads to retinoblastoma. In contrast, humans lack these compensatory mechanisms due to the main protein RB1, leading to retinoblastoma.
Research reveals that human T cells lack expression of certain 'Siglec' molecules, which regulate T cell activation in nonhuman primates. This absence may contribute to the disparity in disease susceptibility between humans and great apes. The study highlights the potential for Siglecs to act as a 'brake' on T cell activation.
Researchers found that oxidized nucleobases in human DNA are associated with hotspots of genetic recombination and polymorphism. The distribution of these abnormally placed adenine nucleotides is not random but clustered in chromosomal regions with high meiotic recombination rates.
Researchers discovered erythrovirus genome persistence in human tissues, which is ubiquitous and life-long. The Bioportfolio provides a novel database for analyzing microbial species and their variants, offering potential long-term permanence for gene therapy vectors.
Researchers identified a gene variant that protects against type 2 diabetes, heart disease, and hypertriglyceridemia. The T-87C variant was found to lower triglyceride levels by 12% and reduce heart disease risk by 34%, offering potential therapeutic targets.
An interdisciplinary team of scientists and physicians has developed guidelines for treating severely injured patients, focusing on inflammation response and genetic factors. The project aims to improve patient care through standard treatment procedures and tailored treatments based on genetic data.
Scientists have developed a new method using molecular beacons to visualize and detect the genome of the respiratory virus in live cells. This technique allows for early detection of the virus, which is essential for treating the disease.
Researchers confirm that both humans and chimpanzees possess gene variants related to bitter taste, but the reasons behind these variations differ. The new findings challenge a 65-year-old genetic discovery made by Sir Ronald Aylmer Fisher, instead attributing the phenomenon to convergent evolution.
Researchers have discovered a 100-kilobase segment of DNA missing from the agouti signaling protein (ASIP) gene in gibbons. The ASIP gene plays a role in lipid metabolism and energy homeostasis, but its deletion may have helped gibbons adapt to arboreal niches. Future studies will examine the physiological effects of this deletion.
A DNA gene vaccine successfully reduced amyloid-beta 42 protein buildup in the brains of mice with a genetic mutation associated with Alzheimer's disease. The vaccine elicited high levels of antibodies and significantly decreased brain plaques, offering a promising therapeutic option for the disease.
A study by Duke University researchers found that prenatal exposure to genistein, an active ingredient in soy, reduced obesity in Agouti mice offspring. The findings suggest a link between early life nutrition and long-term health outcomes, and may have implications for human health.
A UCR-led study identifies RNA silencing as a key innate immunity mechanism protecting fruit flies from viral infections. The research reveals the molecular basis of this antiviral response and suggests potential implications for understanding human antiviral defenses.
A recent study has outlined the genetic differences between two potential pandemic influenza strains of H5N1, revealing increased genetic diversity and a higher risk of human transmission. The research found that the viruses belong to genotype Z, with one strain being more virulent than others.
Scientists find gene regulation plays a key role in human-chimp differences, with rapid changes occurring in transcription factors over 5 million years. These changes may be linked to dietary shifts and cooking habits, enabling humans to thrive in new environments.
Scientists found that changes in transcription factor genes, which control expression of other genes, played a key role in human evolution. The study suggests that rapid adaptations to changing environments, such as the use of cooked food, drove these changes.
Researchers found that humans lost genes related to the sense of smell, bitter taste, and immune response, which may have improved our ability to fight infections. The loss of the CASPASE12 gene, in particular, led to a stronger immune response, but also made it harder for humans to fight off severe bacterial infections.
A study at the University of Texas M. D. Anderson Cancer Center found that Z-DNA, a twisted shape of DNA, can cause genetic instability and breaks in human cells, particularly in those with Burkitt's lymphoma. The research opens up a new field of inquiry into the role of DNA shape in genomic instability and cancer.
Researchers identified a specific set of genes expressed differently in individuals with eosinophilic esophagitis (EE), a chronic disease causing inflammation in the esophagus. The study found that eotaxin-3 levels were significantly higher in EE patients, suggesting potential therapeutic targets.
A recent study using genetic data demonstrates a drastic decline of orang-utan populations on the island of Borneo, coinciding with colonial powers' arrival and accelerated timber extraction. The research highlights the urgent need for conservation efforts to protect the species.
A recent study has found that human and chimp molecular evolution rates are surprisingly similar, indicating that certain human-specific traits such as generation time may have evolved only one million years ago. This slowdown in the molecular clock correlates with a longer generation time, which is also characteristic of humans.
Researchers found two sequences in Gli1 protein that prevent its degradation, leading to accelerated tumorigenesis and shorter tumor latency. This discovery may represent a novel anticancer therapy by modulating Gli protein stability.
Researchers discovered a single mutation in human TRIM5 gene that impairs its ability to defend against retroviruses, including HIV. This mutation occurs at high frequency in some ethnic groups and may have contributed to the evolution of impaired retroviral defense genes.
Scientists have identified the DNA sequence controlling the malaria parasite's ability to change its disguises, a key virulence factor. This breakthrough could lead to the design of a drug candidate molecule that freezes the parasite's disguise capability, allowing the human immune system to respond effectively.
A new study has challenged previous reports that cannibalism played a significant role in shaping the human genome. The research, published in Genome Research, found a deficit of intermediate frequency variants in the PRNP gene, suggesting a complex history of episodic or fluctuating selection.
Researchers found that deleting or over-expressing the lin-4 microRNA in C. elegans worm resulted in a shorter or longer lifespan, respectively. This study suggests an intrinsic biological clock regulates both organ development and aging.
Researchers have identified a genetic factor leading to forehead and frontal bone malformations, which can cause severe craniofacial defects. A potential therapy using FGF supplements may help prevent these defects in embryos with missing TGF-beta genes.
Researchers analyzed genes and developed new statistical technique to estimate divergence time. They found that humans and chimpanzees likely shared a common ancestor between 5-7 million years ago, with a maximum limit of approximately 7 million years ago.
A study found a significant association between high EL concentrations, low HDL-C levels, and early stages of atherosclerosis. This suggests that EL concentrations may be useful in predicting an individual's risk for atherosclerosis.
Researchers discovered a distinctive variant of the prodynorphin gene in humans, which increases production of neuropeptide prodynorphin. This variant is linked to increased brain size, memory, perception, and sensitivity to pain, as well as potential risks for drug addiction, schizophrenia, and bipolar disorders.
STAT proteins play a key role in regulating gene expression by phosphorylating specific sequences, leading to transcriptional activation. This process is essential for various cellular processes, including proliferation and differentiation.
Researchers have successfully sequenced the canine genome, revealing genetic similarities with humans that could help identify disease-causing genes. The breed-specific sequencing project aims to develop new cancer treatments by identifying genetic changes in individual dog breeds.
Researchers found that human cells without securin protein can recover from widespread chromosome losses over time, suggesting compensatory mechanisms at play. This discovery has implications for cancer treatment, as mathematical models often assume cell populations cannot recover from chromosomal instability.
A study on the Platynereis genome reveals that early animals had complex human-like genes, contradicting previous assumptions. The discovery sheds new light on human evolution and highlights the importance of preserving ancient genetic features.
Recent research findings on avian flu provide critical insight into the origin of pandemic influenza, highlighting two possible mechanisms: direct transmission from birds to humans or reassortment with human strains. This knowledge can help scientists track virus adaptation and inform global surveillance efforts and vaccine development.
A 'Perception' gene tracked by scientists suggests regulation of this gene played a crucial role in the evolution of modern humans' mental capacity. The gene, prodynorphin, is implicated in pain perception, social attachment, learning and memory.
Researchers identified the DCDC2 gene as a significant contributor to dyslexia, disrupting brain circuitry that enables reading. The study's findings have the potential to lead to early and accurate diagnoses, as well as more effective educational programs for individuals with dyslexia.
A DNA vaccine could be a powerful tool to combat the 'bird flu' pandemic, potentially produced in as little as two or three weeks. The technique is largely untested in humans, but it might help slow the spread of the disease if enough conventional vaccines aren't available.
A recent study by Yale University researchers has discovered a gene that controls the severity of asthma, finding that high production variants of the macrophage migration inhibitory factor (MIF) gene are associated with severe disease. The study used mice models and human data to support an important role for MIF in asthma pathogenesis.
The study highlights the complex interplay between genetic and environmental factors in determining human aging. While there is no single gene responsible for aging, genetics account for approximately 25% of how a person ages, with stress, environment, nutrition, lifestyle, and immunity also playing significant roles.
Recent studies suggest that major variants in genes Microcephalin and ASPM are evolving under strong natural selection in modern human populations. These genetic changes may have emerged as a result of cultural evolution and the spread of agriculture and written language, coinciding with key milestones in human history.
Two genes, microcephalin and ASPM, linked to brain size have continued to evolve rapidly in humans over the past 37,000 and 5,800 years, respectively. These genetic variants are favored by natural selection and occur more frequently in certain populations.
Researchers at UCSD advocate for standardized, humane guidelines for studying captive great apes, emphasizing the need for specialized care and data management. They propose a national network of facilities to support this effort, which could contribute to the survival of great ape species.
Researchers found that human Y chromosome retained its genes despite chimp's mutation, likely due to human monogamy. The study suggests natural selection preserved regions of the Y with self-repair mechanisms.
The chimpanzee genome's remarkable closeness to the human genome will make it a powerful tool for comparative genetics. The analysis reveals genetic changes that prompted the chimp-human species divergence and provides insight into how evolution has continued since then.
Researchers found that large-scale segmental duplications account for 2.7% of the human genome, while single base-pair changes make up only 1.2%. These duplication events have altered gene expression, with some segments implicated in human developmental disorders such as spinal muscular atrophy and Prader-Willi syndrome.
A recent archaeological comparison of genetic traits indicates that Moche sacrificial victims were not local elite, but rather warriors captured from nearby valleys. This finding suggests territorial conflict and competition among Moche populations in each valley.
Researchers at Joslin Diabetes Center have identified a new gene, ARNT, that plays a crucial role in the development of type 2 diabetes. The study, which used DNA chips to analyze islet cells from patients with the disease, found a marked down-regulation of ARNT, suggesting a possible new target for treatment.
Researchers have achieved a cure for haemophilia in dogs using gene transfer strategies. The study identified key problems to overcome before applying this approach in humans, including mode of delivery.
The study found age-related changes in gene expression in the human brain's cortex, but not in non-brain tissues. The results support a theory that DNA damage and protein degradation contribute to aging, with more metabolically active tissues showing greater gene activity reduction.