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Results for search "Genetics".

Health News Results - 152

TUESDAY, Feb. 23, 2021 (HealthDay News) -- Researchers may have uncovered a key reason some people remain sharp as a tack into their 80s and 90s: Their brains resist the buildup of certain proteins that mark Alzheimer's disease.

The study focused on what scientists have dubbed "super agers" -- a select group of older folks who have the memory performance of people decad...

The DNA ties that bind: Marriage satisfaction may lie in your genes, a new study suggests.

Researchers from the University of Arkansas looked at 71 newly married couples, asking them to complete a survey three months after marriage and again every four months for four years. They also tested their DNA.

Recent research indicates that a variation called "CC" in the gene CD38 is asso...

Gene variants associated with a rare autoimmune disorder called Addison's disease have been pinpointed, according to researchers.

"By studying the single largest collection of samples from patients with Addison's disease, we've been able to carry out the first genetic study of the disease that spans the entire human genome," said study co-leader Daniel Eriksson, a researcher in the experi...

If you like to take a snooze in the afternoon, your genes may explain your love of daytime naps, researchers say.

For their study, investigators analyzed data from the UK Biobank, which contains genetic information from nearly 453,000 people who were asked how often they nap during the day.

The genome-wide association study identified 123 regions in the human genome that are associa...

Certain genetic factors in people with Down syndrome may increase their COVID-19 risks.

Previous studies have found that people with Down syndrome are 10 times more likely to die from COVID-19, and experts have said they should be among those given priority for vaccination.

In this new study, Spanish researchers examined genetic differences in people with Down syndrome that might af...

Like influenza, could COVID-19 evolve to wax and wane with the seasons? New research suggests it might.

Early in the pandemic, some experts suggested that SARS-CoV-2 -- the virus that causes COVID-19 -- may behave like many other coronaviruses that circulate more widely in fall and winter.

To find out if that could be true, researchers analyzed COVID-19 data -- including cases, deat...

An experimental gene therapy for Duchenne muscular dystrophy shows promise, a small study suggests.

The severe form of muscular dystrophy -- which affects about one in 3,500 males born each year in the United States -- causes muscles to progressively weaken and lose the ability to regenerate after an injury.

Muscle tissue is eventually replaced by fat and collagen. Many children wit...

People who've recovered from severe COVID-19 may have stronger long-term immune protection from reinfection than those with milder illness, researchers report.

They examined blood samples from 39 COVID-19 patients and 10 people who hadn't been exposed to the virus (their blood samples were given pre-pandemic). In all, they analyzed the expression of individual genes of more than 80,000 CD...

The relationship between humans and man's best friend is an enduring one.

New research suggests that not only did dog domestication likely happen sometime before 23,000 years ago, but the first people to enter the Americas more than 15,000 years ago probably brought their dogs with them.

"When and where have long been questions in dog domestication research, but here we also explo...

New research reveals why Black Americans might be more vulnerable to colon cancer than white people are.

The researchers examined age-related "epigenetic" changes in colon tissue. These changes affect how genes work.

The investigators found that in both Black and white people, one side of the colon ages biologically faster than the other. But the side that ages faster is different, ...

Everyone has heard the scary reports about the new, more infectious coronavirus variants that are circulating in countries around the world, but scientists aren't pushing the panic button at this point.

Why? Because the new COVID-19 vaccines should still work on these viral interlopers.

Luckily, the new variants still rely on the coronavirus' "spike protein" to infect cells, and the...

Biomarkers in sperm may help identify men at risk of fathering children with autism, researchers say.

For the study, investigators examined sperm epigenetics -- the molecular processes that affect gene expression -- in 13 men who fathered sons with autism and 13 who had children without the disorder.

The American and Spanish researchers focused specifically on DNA methylation, a che...

A special calorie-burning type of body fat appears to help protect against an array of chronic ailments, including heart disease, type 2 diabetes and high blood pressure, a new study suggests.

Brown fat generates heat by drawing glucose from the bloodstream, as opposed to energy-storing white fat, explained senior researcher Dr. Paul Cohen. He's an assistant professor and senior attending...

New research on illness in English bulldogs has discovered a previously unknown genetic health condition -- and could save the lives of some beloved family pets.

Researchers were attempting to better understand B-cell chronic lymphocytic leukemia (BCLL), a common cancer, when they uncovered a non-cancerous syndrome called polyclonal B-cell lymphocytosis. This benign condition has many sim...

If you're a Black man, your risk of getting prostate cancer is 75% higher than it is for a white man, and it's more than twice as deadly.

Now, research is helping to bring genetic risks for people of various racial and ethnic groups into focus. In doing so, dozens more risk factors that could better help pinpoint the odds of developing prostate cancer have been uncovered. And that could ...

While childhood obesity is a significant challenge, German researchers have uncovered some hopeful news while investigating the impact of genes.

Though some "obesity genes" do play a minor role in the success of weight loss interventions, environmental, social and behavioral factors make the biggest difference, according to a new study from the Technical University of Munich.

Those ...

Some older folks are still sharp as tacks and dementia-free well into their 80s and beyond. Now German researchers have uncovered a possible reason why: Their genes may help them fend off protein build-up in the brain.

The finding is based on a study of brain images of 94 participants, all aged 80 or older. They were characterized by the amount of tau protein tangles and beta-amyloid pro...

After starting a drug that's officially approved to treat a type of blood cancer, a young man with type 1 diabetes was able to stop using insulin.

He's been off insulin since August 2018 -- more than two years.

Dr. Lisa Forbes -- his doctor and co-author of a letter describing his case in the Oct. 8 issue of the New England Journal of Medicine -- stopped short of calling...

A pair of studies shed new light on why a relatively rare blood cancer — acute myeloid leukemia (AML) — is more deadly among Black patients.

The takeaways: Where patients live and their access to quality health care matter. And even when Black people with AML have the same access to treatment as white patients, their survival is shorter — something genetic differences might explain....

Results from a long-term study of a gene therapy technique to prevent inherited mitochondrial disease show promise, researchers say.

Studies of the technique at Oregon Health & Science University in Portland show no adverse health effects in rhesus macaque monkeys and their offspring. The researchers said the technique could break the cycle of disease passed from mother to baby through mu...

New research on what happens as a newborn is delivered and takes its first breath may shed light on a potential contributor to sudden infant death syndrome (SIDS).

A team led by doctors from the University of Virginia School of Medicine discovered a signaling system within the brainstem that activates almost immediately at birth to support early breathing.

The findings help re...

More women with early-stage breast cancer may be able to safely skip chemotherapy after having surgery, according to initial results from a major clinical trial.

The trial, conducted in nine countries, found that adding chemotherapy to hormone-blocking drugs brought no added benefit to a particular group of patients. Those were postmenopausal women with hormone-sensitive breast cancer tha...

Major birth defects are associated with an increased, lifelong risk of cancer, researchers say.

It has been known that people with major birth defects have a greater risk of developing cancer as children and teens, but it wasn't clear whether the risk extends into adulthood.

To find out, Norwegian researchers compared more than 62,000 people in Scandinavia, aged 46 and younger, who ...

Scientists say they have spotted the gene responsible for telling you when it's time to pee.

The gene, called PIEZO2, may help at least two different types of cells sense when the bladder is full and needs to be emptied.

"Urination is essential for our health. It's one of the primary ways our bodies dispose of waste. We show how specific genes and cells may play criti...

Medieval plague outbreaks in England picked up frightening speed in the 17th century, Canadian researchers report.

Their analysis of historical documents covering 300 years showed that outbreaks of the plague doubled every 11 days in London during the 1600s, compared to every 43 days in the 14th century.

"It is an astounding difference in how fast plague epidemics grew," sai...

After starting a drug that's officially approved to treat a type of blood cancer, a young man with type 1 diabetes was able to stop using insulin.

He's been off insulin since August 2018 -- more than two years.

Dr. Lisa Forbes -- his doctor and co-author of a letter describing his case in the Oct. 8 issue of the New England Journal of Medicine -- stopped short of cal...

Genetic problems cause about 14% of cerebral palsy cases, and many of the implicated genes control the wiring of brain circuits during early fetal development, new research shows.

The largest genetic study of cerebral palsy supports previous findings and provides "the strongest evidence to date that a significant portion of cerebral palsy cases can be linked to rare genetic mutati...

Families bond over lots of shared experiences -- but one Leslie Seigel and her adult son, Josh, never expected to share was battling cancer.

Soon after Leslie finished chemotherapy for an aggressive form of breast cancer, however, Josh found himself waging his own battle with testicular cancer.

The mother and son soon learned they shared something else -- a genetic mutation ...

A genetic variant in some people may be associated with mental decline that can't be explained by deposits of two proteins linked with Alzheimer's disease, researchers say.

They said their findings could lead to new treatments for Alzheimer's.

The two proteins are amyloid β and tau. Amyloid forms into plaques and tau forms into tangles. Both are found in the brains of A...

Researchers say your biological sex affects gene expression in nearly every type of tissue -- influencing body fat, cancer and birth weight.

Gene expression is the amount of product created by a gene for cell function, the international team of researchers explained.

They said their findings could prove important for personalized medicine, creating new drugs and predicting p...

Asthma treatments tailored to the genes of kids and teens could help improve control of their symptoms, new research suggests.

The study included 241 adolescents, aged 12 to 18, who were randomly selected to receive either traditional asthma treatment or "personalized medicine" -- treatment based on their individual genetics.

During a year of follow-up, those in the personal...

Disturbed sleep doesn't cause Alzheimer's disease, but some sleep patterns may be more common in people who have a high genetic risk for it, a new study reports.

Those patterns include being a morning person, having shorter sleep duration and being less likely to have insomnia, according to findings published in the Aug. 19 online issue of the journal Neurology.

"We ...

Scientists have discovered that the types of fungi living in the lungs play a big part in severity of a life-threatening condition called acute respiratory distress syndrome (ARDS).

In ARDS -- a condition developed by many patients with severe cases of COVID-19 -- the lungs are unable to supply adequate oxygen to vital organs. Patients with ARDS are usually placed on ventilators.

...

It may be possible to protect Parkinson's patients' brains from further damage by turning off a "master regulator" gene, researchers report.

"One of the biggest challenges in treating Parkinson's, other than the lack of therapies that impede disease progression, is that the disease has already laid waste to significant portions of the brain by the time it is diagnosed," said researche...

Stroke is more deadly among Black people than whites, and the reason may come down to genetics.

Researchers who studied the genomes of more than 21,000 Black people found that a common variation near the HNF1A gene was tied to an increased risk of stroke in people of African descent.

The gene has been linked to stroke and heart disease.

"Given the undue burden t...

Scientists are well on the way to understanding more about how genes can cause stillbirth, new research suggests.

In the study, researchers used genetic analyses to identify gene mutations that are linked to stillbirth, which is the in utero death of a fetus after 20 weeks' gestation. The findings might help doctors counsel parents who have experienced a stillbirth.

The ...

As researchers hone in on ways to detect whether someone has a high risk of developing Alzheimer's disease before they have any symptoms, mental health professionals have worried what the psychological fallout of that knowledge might be.

But new research suggests that people can handle the truth.

In the study, seniors who didn't have any Alzheimer's symptoms underwent a sp...

Among people who have the gene that carries a heightened risk for early-onset Alzheimer's disease, a new study suggests that more education might slow the development of beta-amyloid plaques in the brain.

About 1% to 6% of people with Alzheimer's disease have genes that put them at risk for early development of the disease, which can start in their 30s to 50s, the researcher...

The Vikings had smallpox and may have spread it wherever they ventured, scientists report.

That conclusion stems from an examination of teeth from 1,400-year-old Viking skeletons that contained extinct strains of smallpox. The genetic structure of those strains differed from that of the modern smallpox virus eradicated in the 20th century, the researchers found.

"We already...

Some people in their 90s stay sharp whether their brain harbors amyloid protein plaques -- a hallmark of Alzheimer's disease -- or not, but why?

That's the question researchers sought answers for among 100 people without dementia, average age 92, who were followed for up to 14 years. Their answer? A combination of genetic luck and a healthy, fulfilling lifestyle.

"The vast ...

Scientists who have identified the early smallpox strains used to create vaccines against the disease say this type of genetic research could help efforts to develop a vaccine against the new coronavirus.

Smallpox was among the most dangerous viral diseases in human history, killing about three of every 10 people who were infected. Many of those who survived were disabled, blind or di...

Dutch researchers have identified a common genetic variant as a cause of deafness, and say it could be a good target for gene therapy.

Deafness in adults is known to be inherited but, unlike childhood deafness, the genetic causes aren't clear.

To date, 118 genes have been linked to deafness. Variants in these genes explain much of the deafness present at birth and in childho...

Although much of the genetic makeup of humans has been mapped, hundreds of missing DNA sequences remain.

Until now.

Scientists from the U.S. National Human Genome Research Institute report they have produced the complete DNA sequence of a single human chromosome. That discovery could allow researchers to sequence the entire human genome.

"This accomplishment begins...

The progression of Alzheimer's disease may accelerate as iron deposits build up in the brain, a new study finds, hinting at a possible role for the mineral in mental decline.

Using MRI scans of 200 older adults with and without Alzheimer's, researchers found that those with the disease generally had higher iron levels in various parts of the brain. And 17 months later, Alzheimer's pat...

Your genes may have a big impact on bacteria in your wounds and how quickly you heal, new research shows.

The researchers said their findings could help improve wound treatment.

Chronic wounds -- ones that don't show signs of healing within three weeks -- can be costly, and bacterial infection slows the process.

A range of bacterial species are present in chronic w...

Very sensitive people may owe about half of their heightened feelings to their genes, a British study of twins suggests.

Researchers looked at pairs of identical and fraternal 17-year-old twins to gauge how much differences in sensitivity owed to genes or the environment.

While identical twins share the same genes, fraternal twins don't, so findings among identical twins a...

Screening for breast and ovarian cancer genes might be added to the list of medical tests that can be safely and effectively done from home, new research suggests.

The study looked at screening for BRCA1, BRCA2 and other gene mutations linked to an increased risk of breast and ovarian cancer. Women with a BRCA1 or BRCA2 mutation have as much as a 7 in 10 chance of getting breast canc...

Very few people with autism receive two recommended genetic tests, a new study finds.

The American Academy of Pediatrics and other medical groups recommend offering chromosomal microarray testing and Fragile X testing to people with autism, to detect or rule out genetic abnormalities that could affect their diagnosis and care.

For the study, the researchers analyzed data gat...

A child with an uncle or aunt with autism appears to have a more than doubled risk of being diagnosed with an autism spectrum disorder themselves, a new U.S. government-funded study reports.

Roughly 3% to 5% of children with an aunt or uncle with autism can also be expected to have some form of autism, compared with just 1.5% of children overall, according to the study fun...

It was already known that genetics can play a role in drinking problems, but now researchers have identified additional gene variants that could help identify many more at-risk people.

The team conducted a genome-wide analysis of more than 435,000 people of European ancestry to look for shared gene variants among people with problem drinking.

The researchers pinpointed 19 ne...