Articles tagged with Genetic Analysis
A multi-disciplinary team analyzed the Piltdown specimens using DNA and 3D X-ray imaging, revealing that an orang-utan specimen was used to create the fakes. The forgeries were created using a consistent method, suggesting the perpetrator acted alone, with some researchers now accusing Charles Dawson of being the 'lone forger'.
Using cutting-edge eDNA technology, researchers from James Cook University successfully identified largetooth sawfish habitats in the Daly River, Northern Territory. The technique was mostly accurate in waterholes but disappointing in flowing rivers, with limitations yet to be overcome.
Researchers found genetic connections between European settlers and farmers in Central Turkey, tracing back to the late Stone Age. The study suggests that farming knowledge spread from Turkey to Europe through human migration and cultural exchange.
Researchers used assortativity to analyze DNA interactions and identify proteins mediating chromatin contact networks. This approach helps understand genome organization and its relationship with gene expression regulation.
Scientists discovered 15 genome sites linked to depression in European ancestry, regulating gene expression and new neuron birth. Using crowd-sourced data, they detected weak genetic signals associated with depression, supporting a novel approach to complement traditional methods.
A DNA study of New Zealand's acanthisittid wrens has provided evidence that the country was not completely submerged under the ocean around 21 to 25 million years ago. The research found divergences among the species, suggesting they have been resident in New Zealand for over 25 million years.
A new study published in Proceedings of the National Academy of Sciences analyzed DNA from five different mouse lemur species to understand Madagascar's past. The analysis revealed that the island was once linked by a patchwork of forested areas, enabling mouse lemurs to disperse over tens of thousands of years between different regions.
A team of scientists at Helmholtz Munich developed a protocol to analyze metabolite composition in fixed tissues using mass spectrometry imaging. This method allows for the study of spatial distribution of molecules with high precision, enabling the identification of new predictive, diagnostic and prognostic markers.
Researchers from Scripps Florida have discovered a link between bipolar disorder and the striatum, a brain region involved in motor planning and reward perception. The study identified 14 genes differentially expressed in bipolar patients compared to non-bipolar controls, suggesting a causal role in the disorder.
A new high-resolution method allows analysis of all RNA molecules and provides spatial information, enabling precise identification of tumor cells and studying gene activity with greater resolution than ever before. This innovation has valuable applications for both preclinical research and cancer diagnostics.
A Japanese research team has discovered four new genes in rice that could significantly improve crop breeding and help address global food shortages. The newly identified genes, found through genome-wide association studies (GWAS), influence traits such as flowering date, panicle number, and grain yield.
Researchers at University of Illinois have identified candidate genes controlling the accumulation of phenolic compounds in broccoli, which are associated with a lower risk of coronary heart disease and certain cancers. Breeding broccoli with mega-doses of these compounds may lead to improved health benefits.
A study by Colorado State University researchers reveals that tropical mayflies have a higher number of distinct species than their temperate-zone counterparts. The distinctions between these species consist of subtle, genetic differences that aren't readily visible to the naked eye.
Bioluminescence has evolved independently 27 times in 14 major fish clades, underscoring its importance to vertebrate fish in the deep seas. The phenomenon is found throughout the ocean and is used for signaling, camouflage, and species recognition.
Researchers analyzed genetic data from 3,726 African-Americans to estimate patterns of ancestry, finding that 82.1% had ancestors in Africa prior to transatlantic travel. The study reveals regional differences in ancestry, with southern US residents having a greater percentage of African ancestry than those in the North or West.
A series of studies identified a gene called ANK3 as playing a key role in affecting longevity. Higher levels of ANK3 expression were found in older patients with psychiatric disorders and those who had committed suicide.
Researchers at the University of Leeds discovered a key gene, ANR, that enabled plants to tolerate extreme dehydration, allowing them to colonize land around 500 million years ago. The gene is unique to basal land plants and plays a crucial role in responding to stress hormones like ABA.
Researchers at ANU tested breeding habits of fish to disprove theory that larger genitals make males more attractive or successful in fathering offspring. They found females don't find bigger genitals more attractive, contradicting previous studies and human research.
SPARK, the nation's largest autism research study, aims to collect data from 50,000 individuals with autism and their families to accelerate research and discovery. The study, led by Children's Hospital Colorado, will utilize web-based registry and DNA analysis to improve understanding of the causes of autism and develop new treatments.
New study reveals an Ice Age refugium in Arabia, potentially on the Red Sea plains, and suggests modern humans inhabited the region for up to 10,000 years. The findings challenge previous theories that humans did not settle in large numbers until agriculture developed around 10-11,000 years ago.
A genome-wide association analysis of over 1,000 UK twins found that some parts of the microbiome are inherited through genes. The study identified more than a dozen microbes with known links to health that are heritable.
Researchers discovered that African trypanosomes use repetitive 70-bp regions to select new coat protein genes from an archive, evading host antibodies. This process could be crucial for reducing chronic infections of sleeping sickness if deactivated.
A new study uses advanced techniques to identify a lost type specimen of the grey seal species, shedding light on its origins. The research has implications for conservation efforts and can be applied to study existing, lost, and novel specimens.
Scientists created a dissolvable device component using egg proteins, magnesium, and tungsten, outperforming non-degradable memristors. The components worked reliably for over three months under dry conditions but dissolved in hours in water.
SPARK aims to advance our understanding of autism's causes by collecting DNA from 50,000 individuals with autism and their families. Researchers will study genetic mechanisms and environmental factors to develop new supports and treatments.
Microscopic hair analysis is flawed due to subjective characteristics and lack of population-based databases. Re-examination by different examiners can result in inconsistent descriptions.
A new blood test uses a liquid biopsy to detect genetic mutations in non-small cell lung tumors, providing a rapid and accurate method for identifying patients who can benefit from targeted therapies. The test was found to be highly accurate, with 100% predictive value for the primary EGFR mutation and 79% for the KRAS mutation.
The review provides clarity on assessing functional abilities and disabilities in autistic patients, shedding light on the complexities of autism spectrum disorder. Key findings highlight the importance of understanding ability and disability in individuals of all ages, allowing for more effective diagnosis and treatment.
A study of over 6,000 mothers and newborns found that maternal smoking during pregnancy chemically modifies a fetus' DNA, mirroring patterns seen in adult smokers. The research identified new development-related genes affected by smoking, suggesting a potential explanation for the link between smoking and health complications in children.
A recent study from the University of Edinburgh reveals that tardigrades have not acquired a significant proportion of their DNA from other organisms. The research found that nearly all of what was previously proposed to be foreign DNA was actually bacterial contamination.
Researchers designed a minimal bacterial genome containing only essential genes for life, consisting of 473 genes. The JCVI-syn3.0 platform represents a versatile tool for investigating the core functions of life.
The MEGA7 edition features significant upgrades to speed up data-crunching time and handle larger DNA datasets. This allows researchers to analyze more complex genetic information, driving global evolutionary discoveries.
Researchers identified four genes XPO1, BCL11A, REL, and USP34 as responsible for a rare chromosomal deletion disorder. The study found that loss of these genes leads to intellectual disability, microcephaly, and other symptoms.
A genetic analysis of critically endangered Orinoco crocodile hatchlings reveals that some clutches may be fathered by two or three male crocodiles. The study, published in PLOS ONE, found that half of the clutches were fathered by multiple males.
Researchers identify IRF4 as the first gene associated with greying hair, revealing a genetic link to human aging. The study analyzed 6,000 people from diverse ancestry, uncovering additional genes influencing hair shape, curliness, and density.
Scientists have identified a spectrum of genetic alterations, including some that may be clinically actionable and others that could improve diagnostics and screening for patients. The study's findings suggest targeted therapies and immunotherapies could be effective treatments for mesothelioma.
Researchers at Cornell University found that fairy-wren pairs who sing duets are less likely to mate with other males, resulting in higher rates of their own genetic offspring. The strong duet-singing response also reduces cuckoldry in these pairs.
Researchers from PLOS ONE discovered three skeletons buried in medieval graves in France that may have belonged to Muslims, with DNA analysis revealing paternal lineage from North Africa. The burials follow Islamic rites and radiocarbon dating suggests the skeletons are from the 7th-9th centuries.
A new forensic footwear imaging technique using Frustrated Total Internal Reflection (FTIR) imaging has been developed to extract additional information and create detailed digital pictures of personal footprints. This technology has the potential to link individuals or their shoes to specific locations, vital for law enforcement.
A Spanish study analyzed 2,000 volunteers and found that men sharing rare surnames have similar Y chromosomes, indicating they descended from the same original bearers. The correlation between surname frequency and Y chromosome variation only depends on surname frequency.
A new study by NYU researchers identifies molecular switches that turn on gene expression in the notochord, a precursor to the backbone. The team used a marine organism called Ciona and found that specific transcription factors bind DNA sequences, known as CRMs, to control gene expression.
A landmark genetic study found that a person's risk of schizophrenia is increased if they inherit specific variants in the complement component 4 (C4) gene, which plays a role in synaptic pruning. This discovery helps explain decades-old observations and may lead to future therapeutic strategies targeting the disorder's roots.
A new species of bird, the Himalayan Forest Thrush, has been discovered in north-eastern India and adjacent parts of China by an international team of scientists. Genetic analysis reveals three distinct species within a previously thought to be single species, Plain-backed Thrush.
A new species of bird has been discovered in northeastern India and adjacent parts of China by an international team of scientists. The Himalayan forest thrush Zoothera salimalii has distinct differences in plumage, structure, song, and DNA from other related species.
A Neolithic Spanish burial site reveals a closely related local community from 6000 years ago, with at least 47 adults and adolescents buried in a megalithic tomb. The analysis suggests that the individuals farmed cereal crops and had family members buried side-by-side, indicating significant shifts in social identity.
A recent study published in Genome Biology suggests that genetic factors play a significant role in determining our choice of romantic partners. The research found that the genes controlling an individual's height also influence their preference for a partner with similar height, accounting for 89% of genetic variation.
Researchers at Rice University have created a new tool to analyze DNA in its native conditions, reducing analysis time from months to hours. The method generates more accurate results and can be used to build a comprehensive database of thermal behaviors of genetic molecules.
A new study has identified 138 genes essential for plant-fungal symbiosis, which could lead to the development of crop varieties that thrive without fertilizers. This discovery was made possible by comparing genome sequences of plants with and without this symbiotic relationship.
Researchers at UW Medicine developed a method to identify tissues contributing to cell-free DNA by analyzing fragmentation patterns, expanding the scope of liquid biopsies. This approach may aid in diagnosing unknown metastatic cancers and help guide treatment.
A new study found that a blood test monitoring dead cancer cell DNA is superior at tracking the severity and potential spread of metastatic melanoma. This non-invasive test detected cancer recurrence in 85% of patients, compared to 54% with the current standard test.
The study, funded by the National Eye Institute, identified FOXC1, TXNRD2, and ATXN2 as contributing genes to primary open-angle glaucoma. Variations in these genes may lead to reduced mitochondrial protection, increasing optic nerve cell death.
Researchers at the Allen Institute for Brain Science have developed a taxonomy of cells in the mouse visual cortex based on single-cell gene expression, identifying 42 neuronal and 7 non-neuronal cell types. This study provides a basic understanding of brain function by categorizing cellular building blocks.
The study analyzed the fossil record and found a burst of evolution into new forms, followed by specialization that resulted in modern mammal groups. The team built an updated tree of life containing over 177 species, revealing a significant increase in mammal diversity after the extinction event.
Researchers identified 52 genetic variations associated with AMD across 34 gene regions, offering hope for developing diagnostic tests and therapeutics. The study also found rare genetic variations in one subtype of AMD, which could explain why anti-VEGF therapy is less effective in some patients.
Researchers at Imperial College London have discovered two clusters of genes linked to human intelligence, which may influence cognitive functions such as memory and attention. The study provides new insights into the genetic basis of intelligence and may lead to future treatments for neurodevelopmental diseases.
A new, inexpensive, and quick method for detecting tuberculosis has been devised, using a nucleic acid amplification test on disposable electrochemical sensors. The modified test, which involves a colorimetric assay that changes to blue if the infection is present, can be performed with minimal equipment and expertise.
A meta-analysis of 14 studies found that genes play a smaller role in intelligence among US participants from low socioeconomic backgrounds. The study suggests that robust healthcare systems in other countries buffer the negative effects of poverty on genetic potential.
At different hydration levels, researchers found that water contributes to subpicosecond structure fluctuations and broadens vibrational transitions in DNA. The study also reveals a pronounced coupling of backbone modes and an energy transfer between them.
Researchers investigated the reasons behind tamoxifen's varying efficacy in women. Genetic variants on the CYP2D6 gene were initially linked to worse survival rates, but subsequent studies found no association. Advanced statistical modeling suggests that genotyping errors may have contributed to these findings.
A recent study published in Nature Genetics reveals that Short Tandem Repeats (STRs) regulate gene expression and modulate disease traits. STRs, previously thought to be neutral or 'junk' DNA, were found to act like springs or knobs that fine-tune nearby gene expression.