Articles tagged with Dna Sequencing
A centuries-old tooth found on a Caribbean island yielded ancient DNA from a domesticated American horse, which was later discovered to be the oldest sequenced specimen in the Americas. The DNA analysis linked the horses to Spanish explorers who brought them to the mid-Atlantic region in the 16th century.
Researchers at Gladstone Institutes developed a tool called Retro-Cascorder, which logs a cell's genetic activity for days at a time. This allows scientists to create living biosensors that can record changes to their environment.
Researchers used Guardant NGS to analyze nearly 17,000 lung cancer samples and found MET amplification in 1.2% of cases, with 20.8% having overlapping oncogenic drivers. The study suggests that high gene copy numbers and smaller amplified regions can be used to enrich for the true MET-sensitive population.
A team of researchers developed a clonal barcoding approach to track live cancer cells, enabling the detection and isolation of precise clones responsible for tumor formation and early metastases. This technology has the potential to be applied to other cell-based studies, providing valuable insights into biological processes.
Genomic data reveals two distinct species of scrub jays: A. sumichrasti, endemic to southern Mexico, and A. texana, found only in Texas. The study's findings support the recognition of these new species based on phenotypic, behavioral, and genetic differences.
Researchers have discovered a selfish genetic element, known as Segregation Distorter (SD), that skews genetic inheritance. SD has caused dramatic changes in chromosome organization and genetic diversity, leading to the accumulation of deleterious mutations.
Researchers have discovered rare colonies of Rock Doves, the wild ancestors of common domestic and feral pigeons, on secluded Scottish and Irish islands. The findings provide valuable insights into how the domestic pigeon came to be, with varying degrees of interbreeding between the two forms of the species.
Researchers at New York University have created artificial Hox genes using synthetic DNA technology and genomic engineering in stem cells. The findings confirm that clusters of Hox genes help cells learn and remember where they are in the body, with no other genes needed to be present.
Researchers found that dogs derive ancestry from at least two separate wolf populations, an eastern source and a more westerly source. The study, published in Nature, analyzed 72 ancient wolf genomes spanning the last 100,000 years and suggests that domestication occurred in multiple places.
Researchers sampled fecal microbiomes from dogs across diverse populations in South Africa, India, and Laos, revealing similar metabolic functions. The study suggests that industrialization may affect the human microbiome diversity in non-industrialized settings.
A new study explores the characteristics of 36 basic variants of the Holliday junction, a fundamental building block used in DNA nanoforms. The results show that sequences forming the four protruding arms of the junction can enhance or hinder crystallization processes.
A novel single-cell RNA sequencing technique, TAS-Seq, has been developed to provide higher-precision data than current methods. The new method detects more genes and identifies highly variable genes, making it a sensitive high-throughput scRNA method.
A recent study found that certain bacteria species in the gut are associated with a higher risk of colorectal cancer in younger populations. The research suggests that dietary patterns high in processed meats, low-calorie drinks, and liquor may contribute to this increased risk.
Researchers used nanopore sequencing to detect specific genomic disorders in a fraction of the time it takes traditional testing. The study showed that diagnosis of larger chromosomal alterations could be made in one day, while smaller CNVs took two days.
Researchers developed a genetic test that diagnoses primary immunodeficiency disorders (PID), revealing inherited genetic defects in nearly half of patients. The test uses next-generation sequencing technology to identify specific gene variants associated with PID, enabling targeted treatment and earlier intervention for family members.
Researchers from Edith Cowan University, CSIRO, and WEHI have decoded the genome of oats, revealing why they may be a suitable alternative to wheat for those with coeliac disease. The study found that oats contain fewer gluten-like proteins, making them a potentially healthier option.
A massive global study of diverse populations has significantly advanced the understanding of type 2 diabetes by identifying 117 genes that contribute to the disease. The research used genetic data from almost 181,000 people with type 2 diabetes and 1.16 million without it.
A recent study found that boosting the pink pigeon's numbers is not sufficient to prevent its extinction in the future. The species has a high genetic load of bad mutations, which puts it at risk of collapse if conservation efforts do not continue.
A University of Otago study analyzed ancient DNA from the eastern moa, finding that the species altered its distribution as the climate warmed and cooled. The research highlights how past climate change impacted different species in unique ways, challenging a 'one size fits all' model.
A new special issue of Applications in Plant Sciences explores techniques for studying gametophytes, essential for understanding biodiversity and conservation. The study reveals the complexity of gametophyte biology, including their limited size and invisibility in some plants.
Scientists have discovered six new species of frog in Mexico's forests, with one being the country's smallest, the 13mm-long Craugastor candelariensis. The newly discovered species are known as 'direct-developing' frogs, emerging from eggs as perfect miniature frogs.
A new study using environmental DNA reveals a 16% higher fish diversity on coral reefs than traditional visual observations. The approach detects pelagic, reef-bound, and cryptobenthic species that are difficult to spot by divers.
The largest study of its kind analyzed over 12,000 NHS cancer patients' genetic make-ups to detect patterns in DNA mutations that provide clues about cancer causes. Researchers identified 58 new mutational signatures, suggesting additional causes not yet fully understood.
A recent study on the Maniq population found they exhibit high levels of genetic differentiation, similar to other isolated populations. The researchers also discovered that the Maniq retain a unique hunter-gatherer lifestyle and Hòabìnhian-related ancestry, setting them apart from other Southeast Asian groups.
A new study has shown that increasing genetic diversity can improve researchers' ability to identify important genetic markers for health conditions. The study, which analyzed data from over 470,000 Hispanic/Latino individuals, identified 42 previously unidentified regions of the human genome related to BMI, height, and waist-to-hip ra...
Researchers analyzed genomic profiles of over one million cells from 1,000 people, identifying a link between specific genes and immune cell types in autoimmune diseases. The discovery could lead to tailored treatments and refine clinical trials.
The Logan Science Journalism Program has selected 12 accomplished science and health journalists to participate in its 35th annual fellowship program. The fellows will spend 10 days learning contemporary research techniques at the Marine Biological Laboratory, Woods Hole.
A new study from UC Berkeley provides the first detailed description of the fungal biodiversity on Mo'orea, discovering over 200 species of macrofungi. The research team's findings suggest that most species were carried by easterly winds from Australia or other South Pacific islands.
Researchers discovered that shorter antibiotic courses are associated with fewer antibiotic resistance genes in children, but also found increases in resistance to other antibiotics. The study suggests that treatment duration can impact the microbiome and increase susceptibility to other pathogens.
A new study confirms that abnormalities in the GDF15 gene are involved in hyperemesis gravidarum, a condition causing severe nausea and vomiting during pregnancy. The discovery may lead to targeted treatments and improved care for women with HG.
Researchers have identified a key gene that confers stripe rust resistance in bread wheat, providing hope for improving crop yields and ensuring global food security. The discovery was made possible by the assembly of the highest-quality genome to date for bread wheat using advanced DNA sequencing techniques.
A study reveals that new bird species arise in lowland habitats before moving higher into mountainous areas, where genetic differences accumulate. The research suggests that climate fluctuations, particularly during the Pleistocene era, contributed to the evolution of these high-altitude populations.
Scientists have developed powerful new methods for untangling and rewriting DNA, including a CRISPR-Cas12a toggle switch that can turn genes on and off. Nanopore tools are also being used to diagnose parasitic infections and sequence genes faster.
A new DNA test has been developed to identify a range of hard-to-diagnose neurological and neuromuscular genetic diseases quicker and more accurately than existing tests. The test uses Nanopore sequencing technology to scan for abnormally long repeats within patients' genes, which are the hallmarks of disease.
A team of researchers has developed a DNA-based data storage platform with an expanded molecular alphabet, enabling the storage of vast amounts of digital information. The new system uses nanopores to distinguish between natural and chemically modified nucleotides, increasing storage density and sustainability.
Scientists have generated the first full assembly of a potato genome, unlocking breeding possibilities for new varieties. The tetraploid potato's complex genetic makeup has been simplified through sequencing pollen cells, enabling gene variants identification and breeding improvement.
Researchers from Skoltech identified four genetic markers that can predict tocopherol composition in sunflower lines, which is crucial for producing high-quality dressing and cooking oils. This breakthrough discovery will help facilitate faster breeding of new varieties.
A team of researchers has developed a new method using environmental DNA analysis to track the source of fecal contamination in surface water. By analyzing specific DNA sequences, they can identify the main contributors to pollution and potentially pinpoint areas with faulty wastewater treatment infrastructure or poor manure management.
Researchers found that epigenetic inheritance can affect the genetic composition of a population for multiple generations. Exposure to high temperatures accelerated the rate of evolution, increasing the spread of genes through mating.
A new study found that pollutants can be transmitted over many generations in water fleas, persisting long enough to influence the evolutionary process. The effects of low doses of pollutants were detected even after switching to clean water, indicating stable epigenetic marks passed down through generations.
A novel immune-profiling method can return detailed immune cell type proportions using only DNA from blood, potentially allowing for individualized prediction of outcomes in immunotherapy patients. This approach offers the opportunity to ask and answer questions about the immune system in health and disease.
Researchers developed a new personalized test for monitoring cancer recurrence in acute lymphoblastic leukemia (ALL) patients. The MP PCR uses multiple genomic markers to detect disease recurrence sooner, improving treatment strategies and patient stratification.
A new DNA benchmark, developed by NIST and collaborators, enables more accurate detection of genetic variants linked to diseases such as spinal muscular atrophy. The benchmark, based on HiFi sequencing technology, helps labs and clinics sequence genes with high accuracy, critical for disease diagnosis and treatment.
Researchers identified seven rare structural variants affecting 31 genes in severely ill COVID-19 patients, shedding light on individual responses to the virus. These genetic variations may help explain differences in illness severity and suggest potential targets for early intervention.
A study by Michigan Medicine researchers found that people with diabetes have more macrophages in their fat tissue, particularly the anti-inflammatory CD206+ subtype. This subtype is unique in terms of gene expression and may play a role in the development of diabetes.
A new sequencing technique called 2bRAD-M has been developed to accurately identify species-level information from low-biomass and degraded microbiome samples. The method uses restriction site-associated DNA sequencing (RADseq) to produce high-resolution profiles of bacteria, archaea, and fungi down to the level of species.
Researchers analyzed DNA sequences and electronic health records of thousands of individuals to discover that the chance a pathogenic genetic variant may cause a disease is relatively low, about 7 percent. However, some variants are linked to wide range of risks for disease.
Roswell Biotechnologies has developed a molecular electronics sensor on a semiconductor chip, enabling real-time detection of single molecules for diverse applications including drug discovery, diagnostics, and DNA sequencing. The platform offers unlimited scalability in sensor pixel density and high resolution measurements.
A new bilateral tumor model was demonstrated to be useful for investigating the relationship between T-cell repertoire and cancer immunotherapy's therapeutic effects. The study found that T-cell profiles of both tumors were almost identical, indicating a similar anti-tumor response in a single mouse.
Researchers have successfully identified animal species in zoo air by collecting airborne environmental DNA, offering a valuable tool for tracking biodiversity without intensive fieldwork. By analyzing millions of DNA sequences and comparing them to reference databases, scientists can detect even elusive or inaccessible species.
Researchers have created a new approach to edit genes within specific bacteria in a community using CRISPR-Cas9, enabling targeted genetic modifications. This technology could be used to track edited microbes and potentially treat diseases like digestive issues or create more resilient crops.
Researchers developed an RNA-based breath test called the Bubbler that can detect SARS-CoV-2 in exhaled breath, revealing a more direct indicator of current infection. The test also provides additional information on viral load and strain identity.
Researchers have developed a powerful new tool that can determine the diversity of hard corals on a reef by analyzing DNA in seawater samples. This method is faster, easier, and less expensive than traditional visual identification, allowing for more accurate coral reef conservation and restoration.
Researchers used next-generation DNA sequencing to detect residual disease in patients treated with CAR-T therapy for acute lymphoblastic leukemia. The study found that DNA sequencing was more sensitive and accurate than flow cytometry in predicting relapse, enabling earlier intervention.
Researchers at JGI have developed a new protocol to study the effects of genetic variations on traits, using DNA affinity purification sequencing technology. The protocol allows for rapid capture of transcription factor binding locations in the genome, providing insights into gene regulation and function.
Researchers from Trinity College Dublin investigate the epidemiology and population biology of Enteroccocus faecium, a high-priority pathogen. They found that Irish isolates have evolved independently and are diverse, with a unique genetic transposon element encoding vancomycin resistance.
A team of international researchers has developed a globally-applicable ethical code for ancient human DNA research, aiming to address social and cultural implications. The code proposes cooperation with stakeholders, minimal damage to human remains, and respect for indigenous communities' perspectives.
A team of researchers from Lund University has developed a virtual reality tool called CellexalVR to help scientists better understand the complex relationships between genes and cell types. By using VR technology, researchers can visually explore large amounts of genomic data in a more intuitive and collaborative way.
Experts debate whether newborn genome sequencing should be routine, with some arguing it can save lives and be cost-effective. A phased rollout is advocated, with genomic information disclosed sequentially at appropriate ages. The rollout requires data quality improvement and informed consent.
Researchers developed a novel model to identify specific genes and genetic alterations in multiple myeloma, stratifying the cancer's severity via DNA and RNA sequencing. This model revealed diverse subtypes and high-risk patients beyond current classifications.