Articles tagged with Dna Regions
Researchers developed a new method called direct genomic selection that accelerates the search for genetic changes linked to diseases. This approach enables scientists to identify previously unidentified genetic variations in regions of interest, such as those associated with psoriasis.
A recent study published in Cancer Research found that genetic damage in stromal cells within tumors can play a crucial role in tumor development. This discovery may provide new targets for anti-cancer drugs and present a novel strategy for treating and preventing cancer.
Researchers developed a new analytical approach to understand naturally occurring mutations, revealing patterns that distinguish between mutational mechanisms. By analyzing genome sequences from 19 mammalian species, they identified regular clock-like fashion of CpG mutations and shed light on factors influencing evolution.
Researchers develop methylation filtration method to capture gene-rich regions, excluding repetitive DNA, and achieve 93% reduction in sequencing time. The approach enables complete gene sequence recovery from difficult-to-decipher genomes.
The HapMap project aims to create a catalog of common genetic patterns, or haplotypes, which will simplify and accelerate efforts to identify genes associated with chronic diseases. By analyzing DNA samples from over 270 individuals from four countries, the project hopes to provide insights into human genetics.
Scientists discover that cellular senescence involves packaging of specific chromosomal regions into heterochromatin, which triggers a 'stop growing' response in cells. The study reveals genes are switched on in proliferating cells but silenced during senescence.
The study reveals how B cell lymphocytes assemble genes to encode specific classes of antibodies, including IgA, IgE, and IgG. The findings also explain the role of activation-induced cytidine deaminase (AID) in initiating gene specialization, a process crucial for the immune response.
A physical map of the mouse genome provides detailed organization and context to the draft sequence, aiding in gene discovery and understanding health and disease. This mapping effort also enables researchers to access specific regions of DNA for further study.
DNA molecules are pulled into a dense array of pillars by an electric field and then recoil back into the open space due to entropic forces. The researchers estimate the minimum entropic force at 5.7 femtoNewtons, suggesting this method could be used to separate molecules by length.
Researchers have identified a specific DNA flanking region that triggers genetic instability in trinucleotide repeat disorders. This finding opens up new therapeutic targets for treating or preventing these diseases, which affect the nervous system and cause conditions such as muscular dystrophy and Fragile X syndrome.
Researchers have successfully mapped the genetic regions responsible for Hirschsprung disease, a rare inherited disorder affecting the intestines. The study reveals that three crucial regions on chromosomes 3, 10, and 19 contribute to the disease's complex inheritance pattern.
Researchers Shiv Grewal and colleagues found that histone H3 variants are linked to gene expression and chromosomal structure. The study suggests a 'histone code' model for organizing the genome into active and silent regions.
A University of Michigan study finds that ancient human fossils from Australia and Europe show distinctive characteristics to an older African population, contradicting the 'Eve theory'. The research suggests that multiple groups of humans survived and thrived globally, rather than a single ancestral group replacing others.
Scientists at Massachusetts General Hospital found a region on chromosome 10 that may harbor a genetic variant predisposing people to late onset Alzheimer's disease. The researchers believe this variant could be more potent than previously discovered risk factors like ApoE4 and A2M.
Researchers have identified a new genetic risk factor for late onset Alzheimer’s disease on chromosome 10, which may interact independently of the APOE4 gene. The study found a potential mechanism linking this region to elevated amyloid-beta levels in the brain, suggesting new therapeutic opportunities.
A Harvard Medical School study found that immune proteins Class I MHC and CD3-zeta play a role in brain development and remodeling, potentially triggering developmental disorders like dyslexia. The proteins may also be involved in neurodegenerative diseases such as Parkinson's disease and multiple sclerosis.
Researchers compare a large imprinted region in the human genome with its counterpart in the mouse genome, identifying crucial genetic elements that control gene activity. The study provides the first global view of an entire imprinted region in any genome, shedding light on mechanisms of genomic imprinting.
Researchers find nearly 99% identity in X and Y chromosome regions, revealing a much smaller difference in mutation rates. This discovery suggests that genetic-disease-producing mutations must be explored for individual underlying causes, potentially changing the understanding of inherited diseases.
Researchers have sequenced a large segment of the mouse t-complex, identifying 11 nearly overlapping genes, six of which are previously undiscovered. These genes appear to be active in early embryonic development, suggesting that entire regions may turn on and off together as part of developmental choreography.
A recent study published in The American Journal of Human Genetics has found a major genetic component to TB susceptibility, specifically in a group of aboriginal Canadians. Individuals with at least one high-risk copy of the NRAMP1 gene are ten times more likely to develop TB than those without it.
Researchers at the University of Wisconsin-Madison have elucidated the 3-dimensional atomic structure of an enzyme that enables a transposable genetic element to 'jump' between DNA strands. The discovery provides new insights into the mechanism of transposition and its potential implications for HIV-1 treatment.
A study published in Nature Genetics found that a reduced-calorie diet selectively lowers the activity of genes related to inflammation and free-radical damage in the aging brain. This may lead to improved cognitive function and motor skills, as well as lower risk of age-related neurological disorders.
Researchers have discovered a new mechanism for genetic duplication, where duplicated regions are inserted into distant chromosomal sites. This new form of duplication implies that the human genome has more ways of rearranging itself than previously thought.
Researchers at University of Michigan and Swiss Federal Institute of Technology propose alternative theory on Earth's formation. They found that tungsten isotopic compositions of Earth do not match those of enstatite chondrites, supporting the idea that planets received materials from broad regions of the solar system.
Biologists at UCSD discovered that the Argentine ant's ability to thrive in California is due to its low genetic diversity, which allows it to recognize and accept individuals from the same colony. This has led to the formation of a single, large 'supercolony' that dominates native species.
A recent study published in the Proceedings of the National Academy of Sciences found that Jewish men share a common set of genetic signatures with non-Jews from the Middle East, including Palestinians, Syrians, and Lebanese. This suggests that Jews and Arabs are more closely related to one another than to non-Jews from other areas of ...
Researchers found associations between certain personality traits and a polymorphic region in the human AP-2beta gene. These traits include muscular tension, guilt, somatic anxiety, psychasthenia, and indirect aggression. The study suggests a novel approach to understanding the genetic basis of psychiatric disorders and personality.
Researchers at Duke University Medical Center uncovered evidence of genomic imprinting in marsupial opossums but not monotremes like platypuses. The study suggests that the 'battle of the sexes' theory for imprinting evolution may be supported by competition for nutrient allocation among young animals.
Researchers at UCSF Comprehensive Cancer Center identified genetic regions that confer susceptibility and resistance to a human-like skin cancer in mice. The findings suggest that mouse studies may reveal genetic markers of susceptibility and resistance to cancer in humans, which could impact patient-specific treatment modalities.
Researchers have identified a genetic link between intersex goats and a rare human disorder causing excess eyelid growth and premature ovarian failure. The study found that the gene region responsible for intersex goats' hornlessness is similar to the human disorder Blepharophimosis Ptosis Epicanthus inversus syndrome.
Researchers have identified five genes statistically linked to prostate cancer in about 500 men. The strongest candidate has the hallmarks of a gene that thwarts cell division, potentially playing a major role in causing prostate cancer when it fails to function.
A genetic defect in the norepinephrine transporter has been identified as a key player in orthostatic intolerance, a condition that causes racing hearts, nausea, and dizziness. The discovery may lead to new understanding of blood pressure control and treatment strategies for this common clinical problem.
A study suggests a link between chromosome 13 and autism, with another region on chromosome 7 also showing promise. The research, published in the American Journal of Medical Genetics, involved 75 families with at least two autistic children.
Researchers propose a novel mechanism for pericentromeric duplication, which has pulled disparate genes to the central regions of hominoid chromosomes. This process may have created new human genes and contributed to evolutionary divergence from Old World primates.
Researchers have found that the ancestor of human sex chromosomes arose from an identical pair of standard chromosomes approximately 240-320 million years ago. This new evidence suggests that the first events creating sex chromosomes occurred earlier than previously thought, around 100 million years sooner.
Researchers have discovered a genetic on-off switch in yeast that could be used to control insulin levels in diabetics. The switch, consisting of two main parts, can be turned on or off by adding a chemical inducer, allowing for tight control over gene expression.
Researchers have identified a region on rat chromosome 4 containing genes strongly affecting emotionality-related behavior, which only affects female rats. This discovery may provide insights into the biological mechanisms underlying emotional disorders in women.
Researchers have identified 109 mariner elements in the human genome, which may contribute to genetic disorders such as Charcot-Marie-Tooth disease and hereditary neuropathy. The study's findings suggest that mariner transposons could be a hotspot for genetic change and error.
Researchers used DNA fingerprinting to identify 16 wine-grape varieties, including Chardonnay, as the offspring of Pinot and Gouais blanc. This discovery provides valuable information for grape breeders, allowing them to preserve old varieties and develop new ones.
Researchers at The Jackson Laboratory have identified a chromosomal region that interacts with the tub mutation to prevent deafness in the tubby mouse model. The region, known as moth1, maps to mouse Chromosome 2 and was found to protect C57BL/6J mice from hearing loss.
Researchers have found dense clumps of formic acid in three interstellar molecular clouds, providing insights into the formation of complex molecules. The discovery could help identify regions where more biologically important molecules might be located, supporting future searches for glycine sources.
A study found that some boys will be infertile due to inherited Y chromosome deletions from their fathers, who underwent intracytoplasmic sperm injection (ICSI). The deletion region AZFc accounts for 10% of male infertility cases. Genetic counseling is recommended for couples concerned about passing on the condition to their sons.
Biologists at Washington University pinpointed cassava's origins to southern border of the Amazon River basin in Brazil using DNA sequencing techniques. The study reveals genetic diversity in wild and domesticated cassava strains, providing insights into crop improvement.
A team of researchers has determined that a gene on chromosome 12, previously suspected to be a strong genetic risk factor for Alzheimer's disease, cannot be replicated. Despite the initial findings, there is strong evidence for another genetic defect elsewhere on the chromosome that causes Alzheimer's disease.
A genome scan identified regions on chromosomes 2, 4, 10, 16, 17 and 18 that may contain genes influencing nicotine dependence. The study used two independent samples, with limited replication in several regions suggesting further investigation is warranted.
Cornell researchers have used genetic mapping to identify genes that boost rice yield and disease resistance in poor farmers. By introgressing genes from wild rice varieties into domesticated rice, they have increased crop production in unfavorable conditions.
The study reveals that the cell nucleus controls precise timing and location of genetic activation, leading to a better understanding of gene regulation. The researchers developed a dynamic mosaic model to visualize the distribution of replication and transcription sites in the nucleus.
Researchers at University of Chicago and Johns Hopkins Medical Institutions identify genetic regions on chromosomes 1p, 3q, and 4q that appear to contain genes triggering the onset of inflammatory bowel disease. The study confirms the role of previously localized gene IBD1 in concert with another disease gene on chromosome 1.
Two teams of scientists have identified similar genes that control the daily cycles of life, revealing a simple feedback loop mechanism. This breakthrough sheds light on how animals like humans regulate their sleep-wake cycles, and may help explain why heart attacks occur more often in the morning.
Researchers found a substantial genetic component underlying differences in fear response, particularly on chromosome 1, which may contain hundreds of genes. This discovery has implications for developing new pharmacological agents to target human genes implicated in fear-related disorders.
Researchers discovered novel genetic associations with ADHD, including a strong link between the dopamine transporter gene and symptoms. These findings may lead to improved diagnostic tools and targeted treatments for ADHD.
A team of researchers from Oregon Health & Science University has identified three gene regions in mice that are linked to an increased risk of physical dependence on alcohol. The study's findings could lead to a better understanding of alcoholism and the development of new treatments.
Researchers found no association between a serotonin transporter gene polymorphism and the tridimensional personality questionnaire's harm avoidance dimension. The study included 120 normal adult volunteers and explored relationships between the serotonin transporter gene polymorphism and various personality dimensions, including novel...
An international research group has located a new gene, NIDDM2, linked to type 2 diabetes in Finland. The gene is found in the same region as MODY3, a rare early-onset form of diabetes.