Articles tagged with Population Genetics
Dr. Consuelo Walss-Bass shares her groundbreaking research on schizophrenia, emphasizing the importance of considering both genetic predisposition and environmental factors. She also discusses her work with induced pluripotent stem cells to develop personalized psychiatry and reduce stigma around mental health.
Researchers have found a previously unknown group of microbes, known as Asgard archaea, which possess structures similar to those found in eukaryotic cells. These discoveries suggest that Asgard archaea may be the missing link between archaea and eukaryotes, challenging our current understanding of the three domains of life.
A new study analyzing health records from 2012 to 2022 found significant differences in cardiovascular disease risk factors among Asian American, Native Hawaiian, and Pacific Islander populations. The research suggests that regular monitoring of risk factors may help prevent cardiovascular disease among these groups.
A new study highlights the need for more diversity in genomics research, as a commonly found gene variant was mistakenly linked to heart disease in people from Oceanian communities. The researchers found that the variant is actually common among healthy individuals from these regions.
Dr. Guy Rouleau, a renowned geneticist and neurologist, has founded the world's first academic institution committed to open science principles. The Neuro institute aims to transform how brain disease research is conducted worldwide by promoting data sharing and collaboration.
Researchers analyzed DNA of 370 individuals from 800 years, revealing genetic ties between Huns and Xiongnu Empire. The study found a small but distinct set of individuals carrying East Asian genetic signatures, suggesting some Hun-period individuals in Europe traced their lineage back to late Xiongnu burials.
A new study published in Nature Medicine reveals that lifestyle and environmental factors, such as smoking and physical activity, have a profound impact on health and premature death. The research suggests that targeting socioeconomic conditions, reducing smoking, and promoting physical activity can mitigate the risks of chronic diseases.
A deadly ciliate parasite has decimated sea urchin populations in the Caribbean, Red Sea, and Indian Ocean, with mortality rates reaching over 90%. The International team of researchers is working to track the disease and preserve sea urchins, which play a crucial role in maintaining coral reef health.
A genetic study of burial grounds from the Avar period in Lower Austria found that genes and culture did not have to match. The analysis revealed a high number of relatives among the deceased, reconstructing contemporary six-generation-long pedigrees at each site.
A new bioinformatics pipeline analyzes whole-genome sequencing data to accurately estimate genetic relatedness in animal populations. The tool identifies identical DNA fragments inherited from a common ancestor, revealing previously undetected relatives and providing more detailed insights into relatedness structures.
Researchers analyzed nuclear genomes of ancient European specimens to shed light on the genetics of early Europeans and their interactions with Neandertals. The study reveals a small, isolated group that interbred with Neandertals but left no present-day descendants.
Researchers have unraveled the precise timing and functional legacy of Neandertal gene flow into early modern humans. The study suggests that most non-African individuals harbor one to two percent Neandertal ancestry, with the majority tracing back to a single shared period between 50,000 and 57,000 years ago.
A new analysis of DNA from ancient modern humans in Europe and Asia has determined that Neanderthals interbred with modern humans from approximately 50,500 to 43,500 years ago. This period of interbreeding left Eurasians with many genes inherited from their Neanderthal ancestors.
Scientists emphasize the need for gene editing and plant domestication to protect food supplies due to the climate crisis. Researchers propose two strategies: introducing genes that support resistance to environmental stress into existing crops or domesticate wild plants with lower yields but higher resilience.
A new study using genetic links reveals that chimpanzee populations traded advanced toolsets across generations, demonstrating a cumulative culture. Female migrations played a key role in spreading innovation, with complex tools built upon simpler versions.
Researchers found a strong link between depression and menstrual pain in a new study published in Briefings in Bioinformatics. Depression may be a cause of dysmenorrhea, rather than a consequence, according to the findings.
A new study from Queen Mary University of London has identified the genetic drivers of early onset type 2 diabetes in South Asians, revealing a strong link to lower insulin production and unfavorable body fat distribution. The research also sheds light on treatment responses, highlighting the need for precision medicine approaches.
A recent study found that Viking colonizers of the Faroe Islands and Iceland came from different Scandinavian populations. The researchers analyzed genetic samples from 139 men and compared them to samples from Norway, Sweden, Denmark, Iceland, and Ireland, revealing a 'founder effect' that persists in today's male populations.
A new finger prick test for Alzheimer's disease has shown strong performance in a European study, measuring biomarkers in blood from superficial vessels. The test could soon be implemented globally, increasing accessibility to Alzheimer's testing without the need for high-sensitivity analyses.
A study analyzing DNA from skeletal remains in Pompeii casts reveals the cosmopolitan origin of the city's inhabitants, contradicting previous physical appearance-based assumptions. Genetic data also sheds light on ancestry, sex, and familial relationships, challenging traditional notions.
A team of researchers at the University of Toronto has discovered a unique stem cell type, the neural crest stem cell, which can be reprogrammed into different cell types. This discovery challenges longstanding theories in cellular reprogramming and highlights the potential of these cells for stem cell transplantation to treat disease.
The study shows an alternating series of interaction and gene flow between inhabitants of mountainous upland regions and steppes to the north of the Caucasus. Innovations in herd management, dairying, and mobility enabled autonomous nomadic lifestyles adapted to exploit the Eurasian steppe zone.
Researchers have successfully integrated genome sequencing into newborn screening to identify hundreds of rare genetic disorders. This approach allows for earlier diagnosis and treatment, promoting health equity and reducing time to diagnosis.
A research team, led by Francesco Ferretti, located signs of white sharks at four sites in the Sicilian Channel, a stronghold of the endangered species. The team used improved methods and technologies, including eDNA sampling and camera traps, to detect the presence of the sharks.
Researchers analyzed ancient genomes from the Oakhurst rock shelter in southern Africa, finding that the oldest genomes are genetically similar to San and Khoekhoe groups living today. The study reveals a long history of relative genetic stability until around 1,200 years ago when newcomers introduced new cultures and languages.
Researchers at JAX propose using genetically diverse mice and cell-based assays to better predict human responses to drugs and diseases. This approach has shown remarkable improvements in mimicking human diseases, offering a significant improvement over standardized but limited mouse and cellular models.
A new study finds that higher levels of six urinary metals are linked to increased cardiovascular disease and mortality in a diverse US population. The findings support the role of urinary metals as novel risk factors for CVD and all-cause mortality.
Researchers found that close household contacts of people diagnosed with geographically restricted TB strains had a lower rate of infection and active TB disease compared to those exposed to widespread lineages. This suggests a shared evolution between humans and microbes, amplifying the risk for infection.
A recent study found that 'gene misbehaviour' is a common phenomenon in the healthy human population, with over half of inactive genes showing misexpression. The researchers used advanced techniques to analyze blood samples from 4,568 healthy individuals and identified mechanisms behind these gene activity errors.
A new study published in Aging explores the potential of three large DNA methylation datasets to identify biological age signals in dogs. The researchers found that biological age methylation clocks are affected by population stratification and require heavy parameterization to achieve effective predictions.
A new study reconstructs the global migration history of Phytophthora infestans, challenging the common theory of its Mexican origin. The research found that P. infestans likely originated in the South American Andes and then spread globally.
Hybrids between two manakin species in Panama have remained relatively stable over the past 30 years, with minimal changes in genomic markers. The phenotypic transition zone also shows stability, with only one trait having shifted location, suggesting a potential selection for green bellies.
Researchers found that pentraxin 3 is a non-invasive biomarker for severe fibrosis and increased carotid intima-media thickness in patients with MAFLD. Elevated PTX3 levels were associated with advanced fibrosis and larger CIMT values.
Researchers reconstructed ancient genomes of Plasmodium vivax and Plasmodium falciparum malaria parasites to study their worldwide spread. The analysis revealed that European colonizers introduced P. vivax to the Americas, while military activities in Europe facilitated the spread of P. falciparum.
A genetic investigation of 64 child remains found at Chichén Itzá reveals that all the children were male, indicating related male twins were likely selected for ritual activities. The findings suggest a post-sacrificial burial site, with the sacrificed individuals having been chosen for a specific reason.
A new study by ECOG-ACRIN Cancer Research Group aimed to address disparities in breast cancer care for Black patients. The trial found that tailoring research to the needs of underserved groups is effective, with docetaxel showing lower rates of peripheral neuropathy and dose reductions compared to paclitaxel.
A new genetic analysis of Celtic burial mounds in Baden-Württemberg, Germany, confirms the long-held suspicion that two princes were biologically related. The study finds a close relationship between the two individuals and suggests that power structures among early Celtic elites may have been based on biological kinship.
Research from Stockholm University found that translocated pied flycatchers retain songs from their ancestral Dutch population while learning those of their new Swedish environment. This suggests that genetics play a role in shaping bird songs.
A study from North Carolina State University found that environmentally caused alterations in the genome may contribute to Alzheimer's disease risk, particularly in Black people. The research identified stable epigenetic features that distinguish Alzheimer's brains from those without the disease.
Researchers analyzed ancient DNA data from 424 individuals to reconstruct Avar community structures and social dynamics. They found strict patrilineal descent systems, female exogamy, and levirate unions, suggesting females played a key role in promoting community cohesion.
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 global plan to combat the projected surge in prostate cancer cases worldwide by 2040 highlights the need for increased screening among high-risk populations. The report emphasizes the importance of targeted community outreach, including mobile vans, to provide earlier diagnoses and improve treatment outcomes.
Researchers have discovered a virus that infects the fungus Batrachochytrium dendrobatidis, which causes heart failure in frogs and toads. The virus could be engineered to control the fungal disease and potentially save amphibian species.
A research team at the University of Cologne has identified mechanisms governing drug response in small cell lung cancer. The study reveals that large populations of treatment-sensitive cells often hide numerous therapy-resistant cells that can multiply unchecked after successful treatment.
A recent study using cutting-edge super-resolution microscopy has shed light on the role of cohesin in cell division. The research revealed multiple populations of cohesin complexes, each playing a specific role in faithful genetic material segregation during cell division.
A new study found that more than half of American Indian teens had high levels of cholesterol, with nearly two-thirds of young adults experiencing the same issue. The study suggests a need for early screening and treatment to prevent premature heart disease.
A large-scale study has found a significant link between smoking and DNA methylation, with two new epigenetic markers identified that differ by race or ethnicity. The research could lead to better ways to predict smoking-related disease risk and improve early detection and treatment.
An international team of scientists developed AI technology to analyze limited data on rare diseases. The method uses multi-layer networks to explore relationships between genes in patients, revealing genetic causes and severity. This breakthrough opens new avenues for treating rare diseases, including myasthenic-congenital syndromes.
DNA analysis of ancient Bahraini remains shows the presence of a malaria-protective G6PD Mediterranean mutation in three samples, suggesting many people in ancient populations enjoyed protection from malaria. The discovery provides insights into human history and disease progression in the region.
A new study from Uppsala University found that Stone Age hunter-gatherer communities in Western Europe deliberately formed distinct families to avoid inbreeding and maintain genetic diversity. The research analyzed the genomes of several individuals buried at iconic sites in France, dating back to around 6,700 years ago.
A team of researchers from Wayne State University and the Barbara Ann Karmanos Cancer Institute have received a five-year, $9.6 million grant to improve the identification and clinical management of hereditary and multiple primary cancers in African Americans. The study aims to overcome barriers to genetic testing in this population.
Men with low sperm count or none have a higher risk of developing cancer, including at younger ages, compared to fertile men. Families of azoospermic men have a significantly increased risk of five cancers, while families of oligozoospermic men have a higher risk of colon, bone and joint, and testicular cancers.
Studies reveal how primates modify behaviors to care for themselves and others despite physical disabilities. Behavioral flexibility is crucial, allowing them to adjust species-typical behaviors and innovate new ways to participate in daily activities.
A study published in the International Journal of Primatology confirms living Skywalker gibbons in Myanmar, leading to estimates of up to 65,000 individuals in one area. The conservation committee aims to protect this new population and promote protected areas for the species.
Researchers discovered two new genetic pathways associated with worse ICH outcomes, including a pathway affecting blood coagulation and cellular interactions. Population data showed a decrease in aneurysmal SAH strokes and a rise in non-aneurysmal subarachnoid hemorrhages, offering encouraging evidence for intervention success.
A study analyzing ancient DNA from 33 individuals found two separate farmer-associated ancestries in the region, connected to China's Yangtze River valley and Yellow River valley. The genetic results mirror cultural differences between regions, suggesting separate influence spheres and connections to distinct initial migration routes d...
Cancer kills more Black people than White individuals in the Barretos region, whereas in São Paulo city, it is the opposite, according to a study published in Cancer Causes & Control. The disparity is most pronounced for breast and cervical cancer among Black women.
Researchers have identified two distinct brain regions involved in regulating salt and water intake, which can help prevent excessive consumption. The parabrachial nucleus plays a crucial role in feedback mechanisms that reduce thirst and salt appetite after ingesting water or salt.
A recent study published in Aging Cell found a balance between naïve and memory immune cells accelerates or slows down biological aging. The team discovered using novel tools for immune profiling, which opened new doors to understanding the relationships between the immune system and biological age.
A study of wild orangutan males reveals that simply beating rivals in competitions does not lead to siring success. Instead, successful fathers spend more time near the females with whom they mate, suggesting a strategy of concentrating on one neighborhood rather than roaming widely is key.