Posted: July 18th, 2012 | Author: M.Aaron Silverman | Filed under: Cankler Science News, Health, Medicated | Tags: Baker IDI Heart and Diabetes Institute, Chronic Inactivity, Chronic Obesity, Couch Potato, David Dunstan, Dr Lennert Veerman, Obesity, School of Population Health, Television, The Lancet, the Lancet Physical Activity Series Working Group, TV, University of Queensland | Comments Off on Chronic Obesity Killing 5 Million+ Each Year
A third of the world’s adult population is physically inactive, the couch-potato lifestyle kills about 5 million people every year, experts contributing to a special feature in the medical journal The Lancet say.
“Roughly three of every 10 individuals aged 15 years or older – about 1.5 billion people – do not reach present physical activity recommendations,” Dr Pedro Hallal and colleagues said in a report that described the problem as a pandemic.
The Lancet Physical Activity Series Working Group paints an even grimmer picture for adolescents, with four out of five 13 to 15-year-olds not moving enough, the report said.
Inactivity was described for the study as failing to do 30 minutes of moderate physical activity five times a week, 20 minutes of vigorous activity three times a week, or a combination of the two :: Read the full article »»»»
Posted: March 20th, 2012 | Author: M.Aaron Silverman | Filed under: Cankler Science News, Health, Medicated | Tags: Chronic Obesity, Genetics, Obesity, Science News | Comments Off on Researchers Reveal How a Single Gene Mutation Leads to Uncontrolled Obesity
The discovery offers clues about how to turn on brain sensitivity to leptin and insulin, hormones that turn off appetite.
Researchers at Georgetown University Medical Center have revealed how a mutation in a single gene is responsible for the inability of neurons to effectively pass along appetite suppressing signals from the body to the right place in the brain. What results is obesity caused by a voracious appetite.
Their study, published March 18th on Nature Medicine‘s website, suggests there might be a way to stimulate expression of that gene to treat obesity caused by uncontrolled eating.
The research team specifically found that a mutation in the brain-derived neurotrophic factor (Bdnf) gene in mice does not allow brain neurons to effectively pass leptin and insulin chemical signals through the brain. In humans, these hormones, which are released in the body after a person eats, are designed to “tell” the body to stop eating. But if the signals fail to reach correct locations in the hypothalamus, the area in the brain that signals satiety, eating continues. Read the full article »»»»
Posted: March 3rd, 2012 | Author: | Filed under: Biology, Cankler Science News, Health, Medicated, Science News | Tags: Australia, health, Obesity, Obesity Epidemic | Comments Off on Australia: Obesity Epidemic Affecting Autopsies
Australians are getting more obese by the day, with experts warning body fat is masking the diagnosis of other illnesses. It is causing stress on Australia’s public health system and the people who have to examine the grossly overweight bodies. South Australian forensic pathologist Roger Byard says the problem is so bad he cannot get some of his clients onto his examination tables, reports Rebecca Brice from abc.net.au.
Dr Byard says obesity is one of the most frightening epidemics he has seen in his four decades in medicine. “We have antibiotics for infections, we have chemotherapy for cancer, so we take two steps forward but with the obesity problem we’re almost taking three steps back,” Dr Byard said.
Dr Byard says since 1986 the rate of morbidly obese bodies entering his Adelaide mortuary has risen from just over 1 per cent to almost 5 per cent. At times the bodies are so big he has to dissect them on the floor. “We try to avoid this obviously, but if a body is so large that we can’t safely put the body on a trolley then we have to perform the autopsy on the floor, which is terribly difficult.”
The bigger the bodies, he says, the harder it is to dissect them and the harder it is to find the cause of death. “Obesity comes with so many diseases – it’s almost how do you choose which is the problem,” he said. “As well as the fact that they have to carry this excess weight around, their heart’s being compressed and this adipose tissue material is secreting toxins that people think actually cause death of heart cells. So they’re being attacked on all fronts.” Dr Byard said.
The problems are not confined to the morgue. Some obese hospital patients do not fit into CT scanning machines and excess fat can hinder the taking of blood using syringes, which impedes diagnosis in both the dead and the living.