Articles tagged with Human Genetics
Researchers found that a gene controlling cholesterol production also senses oxygen levels, similar to human cells. This discovery offers a new strategy for killing infectious yeast while exploring potential connections between cholesterol and oxygen sensing in humans.
A study by Cardiff University found that males with attractive body odor produce peptides that increase their sexual attractiveness to females. The research suggests that smell plays a crucial role in choosing a partner, particularly for humans and fish, and may be linked to immune genes.
Research suggests that geographic distance from East Africa is a strong predictor of human genetic diversity, supporting the Recent African Origin model. Populations further away from Ethiopia display lower genetic variability, indicating a progressive loss of neutral genetic diversity as new areas were colonized.
Researchers have successfully replicated the hepatitis C virus (HCV) in a laboratory setting using a new in vitro model system. The system allows for the study of HCV therapeutics and the entire virus life cycle, including replication, assembly, and release from host cells.
The US Constitution offers a set of shared values that can help frame the debate on genetic engineering of humans, including promotion of welfare, science, and equal protection. Policymakers will likely debate the benefits and potential harm to future children and the public.
A new mapping effort captures most common human genetic variation across European American, African American, and Han Chinese American ancestry. The research provides a tool for exploring the causal role of common DNA variation in complex human traits.
A new study by UC researchers identifies the Slc39a8 gene as a key player in transporting toxic heavy metals like cadmium, which can cause tissue death and damage. The discovery has significant implications for understanding how nonessential heavy metals contribute to cancer and other diseases.
Researchers found that UTI-causing E.coli strains matched genetically with bacteria from cows and are resistant to antibiotics. The discovery has major public health implications due to the practice of administering subtherapeutic antibiotic doses in animals.
Researchers have developed a zebrafish model that shows human BRAF mutations can induce dramatic black pigmentation and aggressive melanomas. The study also found that p53 deficiency is crucial for melanoma development, providing new insights into melanoma genetics and drug development.
A study published in PLOS Biology found that E. coli bacteria, which reproduce symmetrically, have a reduced growth rate, decreased offspring formation, and increased risk of dying compared to cells inheriting new poles.
Researchers found stretches of DNA on chromosomes 7, 8 and 10 that were shared in 60% of gay brothers, suggesting a complex trait influenced by multiple genes and environmental factors. The study analyzed the genomes of 456 men from 146 families with two or more gay brothers.
Researchers successfully redirected human immune cells to target and kill cancer cells by introducing a specific gene that allows for high-affinity recognition of tumor-associated p53. This breakthrough approach holds promise for a novel, broad-spectrum immunotherapy for malignant diseases.
Alan Hall's work on Rho and Rac GTPases is crucial for understanding how epithelial tumour cells become metastatic. Svante Pääbo receives the Louis-Jeantet Prize for medicine to study genes involved in human evolution, including FOXP2 related to speech development.
Researchers discovered human brain evolution accelerated due to intense selection favoring complex cognitive abilities. Brain-related genes evolved faster in humans and macaques compared to rats and mice. Many genes, including those controlling brain size and behavior, were impacted by this selective process.
Researchers found that a diet-restricted group of mice showed a 50% reduction in beta-amyloid plaques, a substance linked to memory loss and Alzheimer's disease. The study, conducted with collaborators at the University of South Florida, used mice with human genes altered for early onset hereditary Alzheimer's.
The completed chicken genome provides invaluable information for studying the human genome due to its ideal evolutionary distance. Strong conservation in previously thought 'junk' DNA regions has been found, shedding light on their importance.
Researchers at Thomas Jefferson University used gene therapy to restore heart function in rats with failing hearts, reversing cardiac dysfunction. The study found that delivering the human S100A1 gene improved heart muscle efficiency and reversed cardiac dysfunction.
Researchers present a molecular portrait of aging in the human kidney using DNA microarray technology, identifying 985 age-related genes. The study suggests a common aging mechanism operates across different kidney structures and tissues.
Researchers have discovered the structure of human POT1, a protein that caps the ends of chromosomes and regulates telomere length. The protein binds to a ten-nucleotide sequence, protecting the telomere from erosion, and its structure suggests that telomerase activity is regulated by this complex.
The melanocortin-4 receptor's (MC4R) basal activity is essential for maintaining energy balance. The N-terminal domain of the MC4R protein is responsible for this activity. Deletion of this domain impairs the receptor's ability to regulate energy homeostasis.
A University of Utah study shows that a now-extinct species of early human came into direct contact with our species about 25,000 years ago and spread parasites to our ancestors. The analysis of lice genes confirmed key developments in human evolution, including the 'out of Africa' theory.
Head lice analysis suggests that modern humans (Homo sapiens) and archaic humans (Homo erectus) carried distinct types of lice. The study proposes a scenario where the New World louse evolved on an archaic form of humans before transferring to a modern version.
A recent study by Memorial Sloan-Kettering Cancer Center researchers used multiple methods to detect SV40 DNA, RNA, and protein in human pleural mesothelioma samples, finding no evidence of a significant role for SV40. The team also discovered that common laboratory plasmid vectors may be causing false-positive results in assays.
The poplar's genome has been cracked, revealing potential genes specific to trees that could aid in combating global warming. By comparing the genomes of Populus and Arabidopsis, researchers hope to identify tree-specific genes that can be used to modify trees for better energy production and wood quality.
The completed sequence of human chromosome 5 reveals 66 known disease genes and 14 additional genes linked to diseases. The vast terrain also holds important regulatory elements and conserved noncoding regions with powerful influence on gene activity.
A recent genetic analysis found a viral strain linked to the decline of amphibian populations in the US, which may have been introduced through live bait and infected salamanders. The study suggests that emerging diseases are having a major effect on ecosystems globally.
Researchers found over 200 mitochondrial genetic fragments integrated into nuclear genome, potentially disrupting human health. These fragments, known as NUMTs, were more likely to insert themselves within active genes, causing disease.
Researchers found that mutations in clock genes caused male flies to copulate significantly longer than usual, revealing a novel role for these genes in regulating behavioral timing on the order of minutes. The study also suggests that clock genes may have important regulatory functions in other areas beyond cyclic patterns.
The project aims to examine both natural and human factors that spread transgenes into non-engineered crops and natural populations. Biological scientists will collaborate with social scientists to develop a global model of gene flow, accounting for human and natural processes.
Researchers mapped where three retroviruses integrate into human DNA, finding unique patterns for each. This discovery has implications for better-engineered gene therapies and new HIV drugs.
A new breed of vaccine-producing plants is being developed to combat global health issues, including cholera and diarrhea. The innovative technology uses minimal processing to yield heat-stable vaccines for oral delivery.
A new study reveals surprising differences in the DNA of normal cells from different people, detecting 76 large-scale 'copy number polymorphisms' associated with various health conditions. The researchers used a powerful new DNA profiling technique called ROMA, which identified genes involved in neurological development and cancer.
Researchers created a map of the influenza A (H3N2) virus's antigenic and genetic evolution from 1968 to 2003, revealing 11 closely related virus clusters. The approach will aid in monitoring antigenic differences among vaccine strains and predicting infection success of emerging viruses.
A study by St. Jude Children's Research Hospital found that Asian bird flu viruses, such as H5N1, became highly pathogenic through continued circulation and gene swapping in domestic ducks in southern China. The researchers warn that control of poultry outbreaks is crucial to prevent the virus from evolving into a human pandemic.
Researchers at the Medical College of Georgia have identified a gene called Indy that plays a critical role in delivering energy to cells, which may contribute to aging. By altering the activity level of this gene, they found that tiny worms lived longer and were thinner, raising hopes for potential human benefits.
Researchers genetically modified mice to lack the CT or PEMT pathways, resulting in significant reductions of lipoproteins and homocysteine levels. This suggests pharmacological inhibition of PC manufacture in the liver as a potential approach to lower LDL cholesterol and homocysteine levels.
Scientists have identified a genetic basis for alcohol response in roundworms, discovering that subtle variations in the NPR-1 gene affect tolerance. The study found that strains with higher levels of NPR-1 protein exhibit reduced ability to recover from alcohol exposure.
A large international consortium has successfully annotated over 21,037 human genes using publicly available resources. The study provides a reliable systematic network of human-curated relationships between genes and their biological functions, setting the standard for analysis of gene expression and human diseases worldwide.
Researchers at Whitehead Institute have developed a new experimental model of human breast cancer in mice, allowing for the study of early stage development and tumor growth. The model involves grafting human breast tissue into mouse mammary glands, enabling the production of human breast milk and pre-cancerous tumors.
A USC study found that human ancestors developed meat-tolerant genes to resist diseases associated with a meat-rich diet, leading to slower aging and longer lifespan. However, the researchers argue that modern-day humans' sedentary lifestyle and lack of moderation may be contributing factors to high cholesterol and vascular disease.
Researchers developed a novel method to compare genetic changes in developing mice with those in medulloblastoma, revealing common features with early developmental stages. This study provides a foundation for further research into tumor diagnosis and prognosis.
A team of scientists has analyzed the largest sample of Neandertal and early human remains, concluding that Neandertals could not have made a significant genetic contribution to early modern humans. The study's findings challenge the theory of interbreeding between Homo sapiens and Homo Neanderthalensis.
Scientists have deciphered the genome of Wolbachia pientis wMel, a model bacterium that infects fruit flies. The study reveals the bacterium has accumulated more repetitive DNA than any other intracellular bacteria, with potential applications in developing new treatments for diseases such as dengue fever and lymphatic filariasis.
Researchers identified a critical protein, NADPH oxidase 3 (Nox3), essential for otoconia development and balance. The discovery may aid in regenerating otoconia and treating balance-related disorders.
Chiu presented her research on correlating gene changes with limb structure, a topic of interest to paleoanthropologists. By studying the mouse, she found that significant developmental differences are due to changes in gene regulation.
Researchers analyzed 63 SARS viruses from three phases of the 2002-2003 epidemic and found significant genetic adaptations, including a rapid mutation rate and unique molecular fingerprints. The study suggests that containing outbreaks quickly is crucial before the virus becomes more difficult to control.
A team of researchers at the University of Rochester Medical Center discovered that a genetic defect affects lysosome protein arginine regulation, causing Batten disease. This condition leads to lysosomes malfunctioning and cells swelling with waste, ultimately killing brain cells and resulting in severe medical problems.
A team of researchers at Stanford University used a computer simulation to trace the origins of genetic mutations in human populations. By modeling population growth, migration, and mutation rates, they were able to estimate the location and time of origin for these genetic changes.
Researchers discovered that rats bred to prefer alcohol were healthier and lived longer than those bred to avoid it, regardless of drinking habits. The study found that genetic factors, rather than alcohol consumption itself, contributed to the longevity difference.
A study led by Bruce Lahn found that the Abnormal Spindle-Like Microcephaly Associated (ASPM) gene shows strong evidence of accelerated evolutionary changes in the primate lineage leading to humans. These changes are most prominent after humans parted ways from chimpanzees, suggesting a possible key role for ASPM in human brain evolution.
Researchers discover a variant of the NFKB1 gene associated with ulcerative colitis, a condition characterized by intestinal inflammation. Additionally, a second study links the MDR1 gene to Crohn's disease and possibly ulcerative colitis.
Researchers successfully transferred and expressed MGMT into relatively few hematopoietic stem cells using a lentivirus vector, enabling gene-corrected cells to repopulate the hematopoietic compartment. This breakthrough has significant implications for human clinical trials of gene therapy in bone marrow transplantation settings.
The study found 83 genes with higher levels of activity in humans, linked to increased brain activity, while human brains showed increased expression of genes protecting against damage. This discovery may explain why humans have a long lifespan but are vulnerable to neurodegenerative diseases.
Researchers have identified a new gene in zebrafish that controls the formation of calcium carbonate crystals in otoliths, which are crucial for balance and sound perception. By manipulating this gene, scientists can create star-shaped crystals that alter the fish's balance and orientation.
Researchers at UCSD investigate human dietary absorption of a cell-surface molecular sugar called N-glycolylneuraminic acid (Neu5Gc), found in red meat. The study reveals that people absorb and metabolize small amounts of Neu5Gc, triggering an immune response.
Researchers at Dartmouth College and GlycoFi have developed a technology to produce human-like glycoprotein structures in yeast, offering improved quality and quantity of pharmaceutical proteins. This breakthrough has the potential to increase patient access to life-saving drug therapies by overcoming production capacity bottlenecks.
A study by NIH/NIEHS has identified a mouse gene linked to hydrocephalus, a common birth defect. The research team cloned the defective gene, which affects cerebrospinal fluid drainage, and found it causes classic symptoms of hydrocephalus in mice.
Researchers from deCODE Genetics and the University of Oxford found that genetic drift, not admixture, has shaped Iceland's gene pool. The study suggests that small effective population size and relative isolation have contributed to Iceland's unique genetic characteristics.
Researchers found that loss of <i>H2AX</i> gene leads to increased genomic instability and cancer in mice. The study suggests that <i>H2AX</i> deficiency may be a major player in cancer-causing genomic instability, particularly in the context of human tumors with alterations in chromosome 11.
Researchers discover cadmium inhibits DNA repair mechanisms, leading to dramatic mutations and increased cancer risk in humans. Environmental exposure to cadmium may cause genetic damage through this novel pathway.