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Neandertal Gene Variant Linked to Increased Muscle Mass in Modern Humans

Neandertal Gene Variant Linked to Increased Muscle Mass in Modern Humans

Neandertal Gene Variant Linked to Increased Muscle Mass in Modern Humans

Neanderthal Growth Hormone Receptor Linked to Increased Muscle Mass in Modern Humans

Neanderthal Growth Hormone Receptor Linked to Increased Muscle Mass in Modern Humans

A study led by researchers from the Max Planck Institute for Evolutionary Anthropology and Karolinska Institutet has found that a Neanderthal-derived growth hormone receptor can increase muscle mass in modern humans. The receptor, which has two key changes absent in modern humans, leads to a stronger response to growth hormone. This variant is prevalent in South and East Asian populations, with up to 24% of people in some South Asian groups carrying it. The study found that adults with this receptor variant have, on average, 270 grams more muscle mass. The effect of this receptor becomes noticeable after childhood, suggesting its influence emerges during puberty.

Study Reveals Neanderthal DNA's Impact on Muscle Mass in Modern Humans

Study Reveals Neanderthal DNA's Impact on Muscle Mass in Modern Humans

A recent study has identified a Neanderthal version of a gene that enhances the body's response to growth hormone, resulting in increased muscle mass in adults who carry it. This genetic variant, inherited through interbreeding between modern humans and Neanderthals approximately 47,000 years ago, is still present in millions of people today. The research, led by Hugo Zeberg of Sweden's Karolinska Institutet and Philipp Kanis of Germany's Max Planck Institute for Evolutionary Anthropology, found that cells with the Neanderthal receptor grew 40% more than those with the modern human version. The study also noted that adults carrying this variant have, on average, about 270 grams more muscle mass than non-carriers. The effect of this gene variant appears to manifest around puberty, coinciding with a rise in growth hormone levels.

Researchers Identify Traces of Extinct Hominin Ancestors in Modern Human DNA

Researchers Identify Traces of Extinct Hominin Ancestors in Modern Human DNA

Researchers have discovered traces of two ancient hominin species in the DNA of modern humans, according to a study published in the journal Science. These 'ghost' ancestors interbred with Homo sapiens at different times in history. One ancestor contributed genetic material more than 50,000 years ago, while the other did so indirectly via Denisovans over 200,000 years ago. The study utilized a novel technique that examines current human DNA to identify these genetic contributions, bypassing the need for ancient DNA. The findings suggest that one of these ancestors might have been Homo heidelbergensis, a species that lived in Europe, Africa, and possibly Asia. This research highlights the complex interbreeding history of early human populations.

UC Berkeley Researchers Identify 'Ghost Species' DNA in Human Genome

UC Berkeley Researchers Identify 'Ghost Species' DNA in Human Genome

Researchers at UC Berkeley have developed a framework called TRACE to identify regions of the human genome containing super-archaic DNA, which they believe was inherited through interbreeding with unidentified 'ghost species'. This study, led by postdoctoral researcher Arjun Biddanda and graduate student Yulin Zhang, found that about 1% of the human genome contains DNA from these unknown lineages, which may have lived around a million years ago. The research suggests that these ghost species contributed to the genetic makeup of all modern human populations, not just those in Africa. The findings were published in the journal Science.

Fossil Discovery in Fukushima Suggests Diverse Iguanodontian Presence

Fossil Discovery in Fukushima Suggests Diverse Iguanodontian Presence

Recent fossil discoveries in Fukushima, Japan, have provided new insights into the diversity of iguanodontians, a group of herbivorous dinosaurs. A fossil found in 1999 at the Iwaki City Ammonite Center has been identified as the right sternal plate of an indeterminate styracosternan, a type of iguanodontian. This specimen, estimated to be from a dinosaur about 3 meters in length, suggests that iguanodontians of varying sizes inhabited the coastal environments of East Asia during the Late Cretaceous period. The findings, published in Paleontological Research, highlight the presence of both large and small iguanodontians in the region, contributing to the understanding of their evolution and biogeography.

Research Reveals Songbirds' Enhanced Sensory Abilities for Seed Dehusking

Research Reveals Songbirds' Enhanced Sensory Abilities for Seed Dehusking

A recent study conducted by researchers from the University of Alberta, the University of Lethbridge, and the Catholic University of Chile has uncovered that certain songbird species have developed enhanced sensory abilities to dehusk seeds. The study, published in the Proceedings of the Royal Society B, examined the brains of 92 songbird species and found that those capable of dehusking seeds have larger sensory brainstem nuclei, particularly the principal sensory nucleus of the trigeminal nerve (PrV), which processes touch information. This adaptation allows these birds to manipulate seeds with their beaks and tongues, a skill that does not rely on stronger motor movements but rather on a heightened sense of touch.

Strength Training Benefits Post-Menopausal Women by Enhancing Bone and Muscle Health

Strength Training Benefits Post-Menopausal Women by Enhancing Bone and Muscle Health

Strength Training Benefits Post-Menopausal Women by Enhancing Bone and Muscle Health

Türkiye, Saudi Arabia, and Pakistan Sign Joint Defense Pact for Collective Security

Türkiye, Saudi Arabia, and Pakistan Sign Joint Defense Pact for Collective Security

Türkiye, Saudi Arabia, and Pakistan have signed a joint defense agreement, declaring that an armed attack against any one of the three nations will be considered an attack against all. The agreement, signed in Mecca by Turkish President Recep Tayyip Erdogan, Saudi Crown Prince Mohammed bin Salman, and Pakistani Prime Minister Shehbaz Sharif, aims to enhance collective deterrence and expand defense cooperation. The pact is rooted in the countries' historical ties, shared strategic interests, and established defense collaborations.

Antisaccade Performance as a Familial-Risk Marker for OCD in Adolescents

Antisaccade Performance as a Familial-Risk Marker for OCD in Adolescents

A study has investigated antisaccade performance among adolescents with obsessive-compulsive disorder (OCD), their unaffected siblings, and healthy controls. The research aimed to determine if antisaccade performance could serve as a familial-risk marker for OCD. The study found that adolescents with OCD had lower antisaccade correct response rates and longer latencies compared to healthy controls, with siblings showing intermediate performance. These findings suggest that antisaccade performance may reflect familial vulnerability to OCD.

Scientists Identify 'Skinny Gene' Variant Offering Potential for Future Weight Loss Therapies

Scientists Identify 'Skinny Gene' Variant Offering Potential for Future Weight Loss Therapies

Researchers have discovered a genetic mutation, referred to as the 'skinny gene', that allows about one in 7,000 people to maintain a lean physique naturally. This mutation affects the FNIP1 gene, which when turned off, increases calorie burning rather than storing it. The study, published in Nature, involved genetic data from over a million people across three continents. Those with the mutation tend to have lower body fat and cholesterol, and a reduced risk of several diseases, including heart attack and stroke. The findings suggest potential for developing new drug therapies that could mimic these effects in the general population.

Novel Method Enhances Genetic Risk Studies in Rare Immune Cells

Novel Method Enhances Genetic Risk Studies in Rare Immune Cells

A study published in Nature Genetics has introduced a novel method for mapping the three-dimensional structure of the genome in rare human immune cells, specifically type 3 innate lymphoid cells (ILC3s). This approach allows researchers to trace physical contacts between regulatory DNA regions and gene promoters, providing a more precise view of how inherited risk contributes to diseases like Crohn's disease. The study identified over 100 candidate genes potentially linked to inflammatory bowel disease, including CLN3, a gene associated with neurodegenerative disorders.