Articles tagged with Genetic Variation
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A Mass General Brigham study highlights inconsistencies in generative AI that can affect patient safety if not addressed. The researchers found 'drift' (model performance changes over time) and 'nondeterminism' (inconsistent results between runs) in their tests, emphasizing the need for repeated testing and monitoring.
A recent study analyzed genomic diversity in 17 indigenous Peruvian groups, revealing significant genetic variations between Andeans and Amazonians. These differences can impact drug response and dosing, highlighting the need for inclusive genomics research to ensure equitable healthcare outcomes.
Researchers have found that the coevolution between water fleas and a parasitic bacterium has been ongoing for at least 15 million years, preserving genetic diversity. This process, known as balancing selection, ensures that multiple genetic variants for surface molecules are always preserved in the water flea without one ever prevailing.
Researchers have identified nearly 300 common and over 20 rare genetic variants as significant risk factors for schizophrenia. The study emphasizes the role of multiple genes rather than single-gene causation, revealing complexity in the mechanisms underlying the disorder.
Researchers have identified the human odorant receptor for geosmin, a compound responsible for the distinct 'earthy' to 'musty' odor found in soil, plants, and certain foods. The discovery could aid in developing novel detection systems to monitor food quality and water purity.
The PD GENEration study has found that 13% of participants have a genetic form of Parkinson's disease, significantly higher than previous estimates. The study, which reached its goal of 15,000 participants ahead of schedule, provides insights into the genetics of the disease and its potential for precision medicine.
Researchers detected SARS-CoV-2 in six common backyard species, including deer mice, Virginia opossums, and raccoons, with unique viral mutations found in some animals. The study highlights the need for broad surveillance and suggests that areas with high human activity may serve as points of contact for cross-species transmission.
A study found that dogs with a gallbladder disease similar to human cystic fibrosis have impaired CFTR function, not a genetic mutation. This discovery could lead to new treatment targets and insights into the underlying causes of CF-like diseases.
A UAB study found that lower transthyretin levels are associated with an increased risk of heart failure and all-cause mortality. The research highlights the importance of TTR levels in predicting heart disease risk, particularly for individuals carrying the V142I gene variant.
A study reveals that the usage of maternal and paternal X-chromosomes is not uniform throughout the body. Instead, different organs may prefer one over the other. Cells competing for 'permission' to form specific cell types drive this skew. The findings provide insight into the underlying principles of development in XX individuals.
Researchers found a significant association between the KIT M541L variant and mastocytosis diagnosis in patients with systemic and cutaneous mastocytosis. The variant was identified in 19 individuals, mostly diagnosed with systemic mastocytosis, but without significant differences in symptomatology.
Researchers found specific gene variants associated with behavioral health outcomes after a stroke. The study suggests that genetic differences may predict stroke recovery trajectory, enabling personalized medicine approaches for individualized treatment.
Researchers at KAUST have developed NanoRanger, an accurate and rapid method for genetically diagnosing Mendelian genetic disorders. This breakthrough enables diagnosis in just 12 minutes, providing a detailed picture of the genomic disorder.
Researchers highlight DDX41's distinct contribution to myeloid neoplasms with germline predisposition. The discovery sheds light on unique pathogenesis and disease phenotype associated with DDX41 variants.
The study analyzed over 1.8 million SARS-CoV-2 genome sequences to track virus variant spread and evolution. The introduction of free rapid antigen tests, mask regulations, and movement restrictions led to a significant decline in new variants entering Germany.
Researchers developed a new NIPT-based method that reveals 33 pathogenic copy number variations (CNVs) in the Duchenne muscular dystrophy (DMD) gene. This study provides valuable insights into the frequency and spectrum of maternal CNV carriers in the Chinese population.
A new study has generated a global catalog of human gene expression data from around the world, increasing representation of understudied populations. The increased diversity empowers researchers to attain more-accurate insights into genetic factors driving human variation and disease risk.
Researchers have identified a mechanism in dogs that may render multiple antibiotic classes ineffective due to the loss of function of specific genes. This discovery opens up new avenues for therapies to treat both animals and humans, and establishes clinical infections in dogs as a surveillance approach for public health.
An international team of evolutionary biologists investigated the genomic underpinnings of plant adaptation to cold environments. The study found that polyploids exhibit genomic structural variants with signals for possible local adaptation more frequently than diploid species.
A start codon variant in the LAG3 gene is associated with decreased expression of the protein and increased risk of autoimmune thyroid disease. The variant, found in Iceland and Finland, has a founder effect and demonstrates the power of bottlenecked populations to identify rare disease-associated variants.
Scientists have mapped over 5,000 genetic variants in the 'tumour protection' gene BAP1 that significantly increase cancer risk. These variants can be used to develop new treatments, including IGF-1 inhibitors, to slow down or prevent cancer progression.
A large-scale genetic survey found that genes can influence the risk of developing atrial fibrillation. Researchers analyzed over 400,000 individuals and identified six genes whose genetic changes significantly affect a person's risk.
Researchers have discovered several rare types of helper T cells associated with immune disorders such as multiple sclerosis and rheumatoid arthritis. The study found that genetic variants in bidirectional enhancer DNA are linked to specific immune-mediated diseases, including inflammatory bowel disease.
Researchers at the Francis Crick Institute have mapped all possible outcomes of changes to the tumour-suppressing VHL gene, enabling clinicians to predict cancer-causing variants with 100% accuracy. The study also found that faulty VHL mutations can increase the risk of kidney cancer and may benefit from belutifan treatment.
Pharmacogenomics (PGx) testing can predict how patients will respond to systemic therapies, enabling personalized treatment plans and optimizing medication dosages. A specific gene variant, HSD3B1, has been linked to castration-resistant prostate cancer progression.
A new editorial paper discusses molecular and cytogenetic analyses used to identify distinct subtypes of acute myeloid leukemias (AML) and myelodysplastic syndromes (MDS). Researchers found that around 15% of AML cases remain genetically unclassifiable, emphasizing the need for further research.
A large-scale genetic study has found a significant link between the age of puberty in girls and weight gain, highlighting potential risks for early puberty and obesity. The study identified over 1,000 genetic variants that influence the age of first menstrual period, with around 600 being observed for the first time.
The RENEW system, launched in 2022, uses new research discoveries to pinpoint genetic variants causing rare diseases. Researchers successfully diagnosed 63 patients out of 1,066 undiagnosed cases with an average diagnosis time of 20 seconds.
A new genetic cause of obesity has been discovered, linking it to the SMIM1 gene variant. People with this variant tend to expend less energy when at rest, leading to excess weight and increased risk of obesity.
Researchers found that carrying just one copy of the Christchurch variant delayed cognitive decline and dementia in family members, with some showing lower levels of tau proteins. The study suggests potential benefits for drug development targeting this genetic pathway.
A genome-wide association study found consistent positive genetic associations between coffee consumption and harmful health outcomes in two large datasets. However, the relationship with psychiatric conditions was more complicated, showing both positive and negative correlations across different cohorts. The study highlights the compl...
Families with germline CDH1 P/LP variants show a cumulative risk of gastric cancer between 7-10% and breast cancer in female carriers at 37%
The Kids First DRC has introduced an upgraded data portal to streamline big data search and analysis, improving collaborative pediatric research outcomes. The new portal integrates diverse datasets, including genomic information from the Children's Brain Tumor Network, to foster cross-disciplinary research.
Researchers from Tokyo Medical and Dental University used long-read RNA sequencing to decode genetic intricacies and disease links. The study identified novel isoforms, cell-type-specific splicing patterns, and disease-linked transcripts associated with immune-related diseases.
Pharmaceutical genomic testing can optimize drug dosages and minimize adverse events in treating metastatic prostate cancer. By understanding an individual's genetic variations, clinicians can tailor treatments more effectively.
This study investigates the association of mosaic chromosomal alterations (mCAs) with cirrhosis risk and finds that individuals with copy-neutral loss of heterozygosity mCAs have a significantly increased risk of cirrhosis. The risk is higher in patients with expanded cell fractions of mCAs, especially for decompensated cirrhosis.
Researchers identified 28 different cell types and linked gene expression to variants, enabling better understanding of how genetics lead to disease. The study provides insights into precision-medicine approaches for neuropsychiatric disease.
Adult carriers of BAP1 tumor predisposition syndrome show a high incidence of onychopapillomas, a benign nail tumor. This finding suggests using these skin abnormalities to identify family members and patients with cancers associated with the syndrome.
Scientists have developed a functional model of thoracic aortic aneurysm using human cells in laboratory rats, offering new avenues for drug development and effective screening. The model successfully mimics dilation of the human aorta and has potential applications for treating this potentially fatal condition.
A study published in Nature Genetics has identified genetic variants associated with an increased risk of breast cancer in women of African ancestry. The research found that nearly 8% of women carry all six risk variants, making them 4.2 times more likely to be diagnosed with triple-negative breast cancer.
A genetic variant present in 3-4% of self-identified Black individuals increases the risk for heart failure and death. Carriers of the V142I variant are at significantly increased risk for heart failure beginning in their 60s, with an increased risk for death beginning in their 70s.
The world's largest study of cerebral palsy genetics found genetic defects are responsible for over a quarter of cases in Chinese children. Researchers identified 81 genes with causation mutations, indicating that improper brain development may be the underlying cause of cerebral palsy rather than lack of oxygen at birth.
Researchers created GraSSRep and rhea, tools that outperform current methods for handling repeats and structural variants in metagenomic data. These methods use self-supervised learning and graph neural networks to analyze microbiome data, offering new insights into biological processes and potential applications in antibiotic resistance.
Researchers identified over 500 functional non-coding DNA variants associated with chemotherapy resistance in acute lymphoblastic leukemia, a common childhood cancer. These variants were linked to a specific gene and mechanism of resistance, offering new insights into the underlying causes of treatment failure.
A study found a significant association between the TNFSF15 rs4979462 gene variant and increased risk of systemic lupus erythematosus (SLE) in female patients. Higher TNFSF15 serum levels were also correlated with SLE disease activity, suggesting this protein could be a biological marker for the disease.
Researchers identified a spectrum of effects on sodium channel function due to SCN2A variants, with hyperactive channels linked to early seizure onset and underactive channels associated with autism. The study provides insights into the relationship between genetic changes, disease severity, and age of seizure onset.
A study by Dr. Carolin Sommer-Trembo and her team found a strong correlation between exploratory behavior and habitat in African cichlid species. The researchers identified a genetic variant that makes fish more curious, which may have implications for understanding mechanisms of biodiversity and human personality.
A new study found that genetic variants in lysosomal genes may contribute to the development of Parkinson's disease in individuals exposed to high levels of pesticides. The research suggests a potential gene-environment interaction, where minor changes in these genes can lead to increased disease risk under stress.
Female cuckoos have two color variants: gray and rufous, linked to ancient mutations that emerged during the evolutionary arms race between host and cuckoo. The rarer color morph has an evolutionary advantage due to its rarity, causing genetic variation to be maintained for a long time.
Women with germline BRCA pathogenic variants face increased risk of mortality from postpartum breast cancer, particularly those diagnosed under 10 years after giving birth. The study highlights the importance of genetic counseling and tailored prevention strategies for these high-risk individuals.
Researchers highlight the risk of novel SARS-CoV-2 variants emerging due to prolonged viral replication in immunocompromised individuals. Close genomic surveillance and early diagnostic tests are crucial to mitigate potential public health threats.
Researchers have identified a rare genetic condition, Glutamine Synthetase Stabilization Disorder, which causes seizures and delayed development. The study found that genetic variants increase the stability of an enzyme producing glutamine, disrupting brain development.
Researchers have identified new genetic variants linked to susceptibility of cervical cancer-causing virus, raising the risk of getting cervical cancer from high-risk HPV infection. The study found polygenic risk scores to determine likelihood of having prevalent or persistent HPV infections.
Young breast cancer survivors without germline pathogenic variants are at lower risk for developing a second primary breast cancer within the first decade after diagnosis. This study informs treatment decision-making and follow-up care considerations in this population.
This study evaluated somatic copy number alterations (SCNAs) and mutation landscapes in malignant rhabdoid tumors before and after treatment. The results revealed recurrent SCNAs harboring genes involved in tumorigenesis, with some correlations between gene expression and tumor progression.
Researchers analyzed exome sequencing data from 773 affected individuals and 643 unaffected relatives, discovering a correlation between increased consanguinity and complex genetic disorders. The study created a population-specific database revealing unique DNA information unseen in larger cohorts.
A genetic variant affecting mitochondrial POLG enzyme function delays viral infection detection, leading to delayed severe inflammation and brain/liver damage. This mechanism explains variable ages of onset and manifestations of neurological diseases like MIRAS in patients carrying the variant.
The study revealed three genetically distinct populations of rusty-patched bumblebees, highlighting the need for tailored conservation efforts. The analysis showed low colony abundance and high rates of inbreeding, threatening the long-term viability of the species.
A recent study has identified two distinct viral variants circulating in India, one with a low number of genetic variations and another with a high number of genetic variations. The latter variant is similar to LSDV strains from an outbreak in Russia in 2015, which may have contributed to the severity of the disease.
A recent study discovered rare YKT6 gene variants as the cause of a new neurological disorder characterized by developmental delays, severe progressive liver disease, and a potential risk for liver cancer. The study found that these variants impair autophagy, leading to abnormal protein accumulation and cellular waste breakdown issues.