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Older men more likely than women to die after pneumonia

A recent study published in Critical Care Medicine found that older men are at a higher risk of death from community-acquired pneumonia compared to women. The researchers discovered that men's bodies respond differently to infection, leading to a stronger inflammatory and coagulation response, which may break up blood clots more quickly.

Tiny differences in our genes help shed light on the big picture of human history

Scientists have developed a new tool to identify big events in human history by examining tiny genetic differences. This research, published in the journal Genetics, confirms a major decline in European populations 32,500-47,500 years ago and helps pinpoint gene mutations linked to diseases such as cancer and heart disease.

Study identifies genes that protect against aging

Researchers at the University of Liverpool have developed a new method to identify genes that help protect the body from age-related changes. The study analyzed over five million gene measurements across multiple tissue types in animals and humans, highlighting key biological mechanisms that allow the body to adapt to aging.

SourceUniversity of Liverpool·JournalBioinformatics·DateApr 20, 2009

Why 'lazy Susan' has a weak heart

Heidelberg cardiologists have discovered a single amino acid mutation that can severely limit heart function in zebrafish, a model similar to the human genome. The researchers hope to develop new therapies for patients with cardiac insufficiency by targeting this mutation.

SourceHeidelberg University Hospital·JournalCirculation Research·DateMar 5, 2009

'Neurological work-arounds' offer hope to people with monoamine-related disorders

Researchers have identified a way for the brain to compensate for problems with neurotransmitters like serotonin and dopamine, opening up new treatment options for addiction, depression, Parkinson's disease, and schizophrenia. The discovery was made using fruit flies with a genetic mutation that disrupted monoamine neurotransmitter rel...

Ancestral genome of present-day African great apes & humans had burst of DNA sequence duplication

Researchers found a surge in duplicated sequences containing rapidly evolving genes in the genomes of humans and great apes, with most differences occurring prior to the speciation of chimpanzees. The study suggests that genetic differences contribute significantly to the distinctiveness between humans and chimps, and that these region...

SourceUniversity of Washington·JournalNature·DateFeb 11, 2009

Living longer thanks to the 'longevity gene'

A study by Kiel University confirms a special sequence variation of the FOXO3A gene is more frequent in centenarians globally, supporting its role in longevity. The research team analyzed DNA samples from 388 German centenarians and 731 younger individuals, finding consistent results worldwide.

SourceKiel University·JournalProceedings of the National Academy of Sciences·DateFeb 3, 2009

Researchers find pathway and enzyme unique to tularemia organism

Researchers at UTSA have made a breakthrough discovery in the fight against tularemia, a deadly bio-warfare agent. They identified a unique metabolic pathway and enzyme, nicotinamide adenine dinucleotide synthetase (NMS), that is specific to Francisella tularensis, making it a potential target for therapeutic development.

SourceUniversity of Texas at San Antonio·JournalProceedings of the National Academy of Sciences·DateFeb 3, 2009

Gene's past could improve the future of rice

A Purdue University researcher used a process focusing on one gene to trace the evolutionary history of domesticated rice, discovering genetic variation over millions of years. By comparing domesticated plants to wild rice species, scientists can identify valuable genes for desirable traits like branching and increased plant size.

SourcePurdue University·JournalProceedings of the National Academy of Sciences·DateJan 23, 2009

Researchers genetically link Lou Gehrig's disease in humans to dog disease

A recent study has genetically linked Lou Gehrig's disease in humans to a similar disease in dogs called degenerative myelopathy. The researchers discovered that dogs with this disease have the same genetic mutation as humans with ALS, paving the way for using them as animal models to help identify therapeutic interventions.

SourceUniversity of Missouri-Columbia·JournalProceedings of the National Academy of Sciences·DateJan 21, 2009

Language driven by culture, not biology

Researchers modelled gene evolution alongside language development, concluding that genetic adaptation to language is unlikely due to rapid cultural change. The study suggests that human language has evolved primarily through cultural conventions rather than biological adaptation.

SourceUniversity College London·JournalProceedings of the National Academy of Sciences·DateJan 19, 2009

When it comes to sleep research, fruit flies and people make unlikely bedfellows

Research published in the journal Genetics shows that fruit flies and humans regulate their circadian rhythms through similar cellular machinery. This discovery provides a viable animal model for circadian research and sheds light on the potential treatment of seasonal affective disorder, insomnia, and possibly some cancers.

The genetic heart of the lipids

A population cohort study found six novel genetic variants associated with lipid levels, a common indicator of heart or artery disease. The research team analyzed over 20,000 DNA samples from European countries, increasing the power of 'genetic microscopes' to identify lipid-gene links.

SourceWellcome Trust Sanger Institute·JournalNature Genetics·DateDec 7, 2008

'MEDNIK': A novel genetic syndrome

Researchers have identified MEDNIK syndrome as a debilitating genetic disorder characterized by mental retardation, enteropathy, deafness, and other symptoms. The AP1S1 gene mutation is found to cause impairment of neural networks, including the spinal cord, inner ear, and brain.

SourcePLOS·JournalPLOS Genetics·DateDec 4, 2008

Fruit fly research may lead to better understanding of human heart disease

Researchers have identified a connection between fruit fly genetics and human heart disease, revealing that certain genes play a role in both embryonic and adult heart function. The study found TBX20 mutations in humans with structural congenital heart abnormalities and heart muscle dysfunction, suggesting its potential involvement in ...

SourceSanford Burnham Prebys·JournalProceedings of the National Academy of Sciences·DateDec 1, 2008

Common cold virus came from birds

A virus causing human-like symptoms may have emerged from a bird virus 200 years ago, according to scientists studying the common cold. Human metapneumovirus has high evolutionary rates and is closely related to Avian metapneumovirus C, suggesting a potential species barrier crossing event.

SourceMicrobiology Society·JournalJournal of Virology·DateNov 20, 2008

Sex and the pond snail

A study by Hayley Frend found that pond snails exhibit handedness in mating behavior, mirroring brain asymmetry pre-programmed by their mother's genes. This discovery sheds light on brain specialization and its importance across species.

SourceUniversity of Nottingham·JournalBiology Letters·DateNov 11, 2008

DNA chunks, chimps and humans

Researchers compared many human and chimpanzee genomes to identify duplicated or lost regions during evolution, finding similar patterns in copy number variation but key gene differences. CNVs affected genes involved in inflammation and cell proliferation, with one gene linked to HIV susceptibility found to have reduced numbers in chimps.

SourceWellcome Trust Sanger Institute·JournalGenome Research·DateNov 5, 2008

Study finds value in 'junk' DNA

A recent study from the University of Iowa found that nearly half of human DNA, composed of repetitive sequences like Alu elements, gives rise to functional exons that regulate gene expression. These findings suggest a link between 'junk' DNA and human-specific traits, such as muscle-related diseases.

SourceUniversity of Iowa·JournalPLOS Genetics·DateOct 16, 2008

Genes affect weight loss drug effectiveness

A Mayo Clinic study found that obese patients with specific genetic markers experienced greater weight loss when taking the medication sibutramine. Patients who lacked these genetic factors showed little to no weight loss during the 12-week trial.

SourceMayo Clinic·JournalGASTROENTEROLOGY·DateOct 1, 2008

Exploring the function of sleep

A study published in PLOS Biology suggests that sleep is crucial for brain function, allowing the brain to regroup after a hard day of learning. The research proposes that sleep enables the brain to consolidate new memories and 'forget' random impressions, making it essential for continued learning.

SourcePLOS·JournalPLOS Biology·DateAug 25, 2008