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Jun 27
Run daily for a super memory
A long-term exercise regimen may help boost memory as it triggers a protein that enhances brain cell growth, a new study has found.

The findings showed that the production of cathepsin B -- a protein that can be directly traced from the muscles to the brain in mice -- noticeably increased in muscle cells after exercise.

"In the study, we did a screen for proteins that could be secreted by muscle tissue and transported to the brain and among the most interesting candidates was cathepsin B," said Henriette van Praag, Neuroscientist at the National Institute on Aging in the US.

The more time the mice spent on exercise wheels, the level of protein increased in the blood and muscle tissue.

"In humans who exercise consistently for four months, better performance on complex recall tasks, such as drawing from memory, is correlated with increased cathepsin B levels," van Praag added.

Additionally, when cathepsin B was applied to brain cells, it spurred the production of molecules related to neurogenesis.

"We also have converging evidence from our study that cathepsin B is unregulated in blood by exercise for three species -- mice, Rhesus monkeys and humans," van Praag noted.

For the study, published in the journal Cell Metabolism, the team compared memory recall in normal mice with that in mice lacking the ability to produce cathepsin B under both sedentary and running conditions.

Over the course of a week, both sets of mice were given a daily swim test in the Morris water maze, in which a mouse is placed in a small pool and must learn to swim to a platform that is hidden just below the surface of the water.

After doing this task for a few days, normal mice eventually learn where to find the platform.

However, when both groups ran before their daily swim test, the normal mice were better able to recall the location of the platform, while the mice unable to make cathepsin B could not remember its location, suggesting the potential of the protein in spatial learning.

Jun 25
Obese fathers may raise high risk of cancer in daughters
A new study states that paternal obesity may raise cancer risk in daughters. The study was conducted on mice and found out that female children born to obese fathers are at high risk of being overweight at their birth and throughout childhood.

The studies showed that female mice pups born to obese fathers are also prone to delayed growth of their breast tissue as well as being at increased risk of developing breast cancer.

Obesity changes the microRNA (miRNA) signature -- epigenetic regulators of gene expression -- in both the father's sperm and the daughter's breast tissue, suggesting that miRNAs may carry the epigenetic information from obese dads to their daughters.

Lead researcher, Sonia de Assis, Assistant Professor at Georgetown University in the US says,'This study provides evidence that, in animals, a fathers' body weight at the time of conception affects both their daughters' body weight both at birth and in childhood as well as their risk of breast cancer later in life'.

The miRNAs were identified to regulate the insulin receptor signalling, which is linked to alterations in body weight and other molecular pathways that are associated with cancer development.

"Our animal study suggests that those epigenetic alterations in sperm may have consequences for next generation cancer risk," de Assis further added.

Eating a balanced diet, keeping a healthy body weight and lifestyle is imperative for both men and women not only for their own benefit but also to give their children the best chances of being healthy, said the paper published online in the journal Scientific Reports.

The next step is to see if the same associations regarding breast cancer risk hold for daughters of human fathers who are overweight around the time of conception, the researchers concluded.

Jun 24
Breastfeeding can reduce behavioural disorders in children
Longer durations of exclusive breastfeeding can lead to fewer behavioural disorders in children at the primary school age, finds a new study that focused on how the experiences of a child in his or her first years of life influences later behaviour and abilities.

Conduct or behavioural disorders that typically start in childhood and persist into the teenage years are associated with an increase in antisocial (and potentially violent or criminal) behaviours, poor long-term mental health and low academic achievement in later life.

The findings showed that children who were exclusively breastfed for the recommended first six months were approximately half as likely to have conduct disorders at the ages of 7-11 years, compared with those exclusively breastfed for less than one month.

"The duration of exclusive breastfeeding of an infant has greater importance than previously realised in several areas of development," said lead author Tamsen J. Rochat of the Human Science Research Council, Durban, South Africa.

"Childhood onset conduct disorders can lead to aggressive or disruptive behaviours, which interfere with learning and peer relationships, in turn leading to low self-esteem and further behavioural problems," Rochat added.

Further, children whose mothers had a current mental health problem or severe parenting stress were two-and-a-half times more likely to exhibit emotional-behavioural problems.

For the research, published in PLOS Medicine, the team assessed over 1,500 children in South Africa, 900 of whom had been involved in an early infant feeding study.

Jun 22
Increase vitamin D levels to cut kidney problems
A deficiency in the amount of vitamin D in the body may lead to high risk of chronic kidney diseases, especially in children, says a new study.

Vitamin D deficiency has been found common in children with chronic kidney disease (CKD) -- the longstanding disease of the kidneys leading to renal failure.

Researchers have identified certain modifiable and non-modifiable factors associated with vitamin D deficiency in children with CKD.

According to the study, nearly two-thirds of children suffering from vitamin D deficiency were also suffering from certain abnormalities like glomerulopathy -- a set of diseases affecting the nephrons.

Vitamin D levels were found lower in winter months than at other times of the year.

"Vitamin D levels are influenced more strongly by seasonal factors, the type of disease and nutritional supplementation than by common variants in vitamin D regulating genes," said Anke Doyon, at the University of Heidelberg in Germany.

Deficiency in Vitamin D may also increase the risk of osteoporosis, cancer, cardiovascular disease and autoimmune disorders, the researchers said.

Children with kidney disease who took vitamin D supplements had vitamin D levels that were two-times higher than those who did not take supplements.

"Supplementation practices should be reconsidered and intervention studies are needed to define guidelines how to monitor and treat vitamin D deficiency in children with chronic kidney disease," Doyon suggested.

The team analysed 500 children affected with kidney diseases in 12 European countries.

The findings published in the Clinical Journal of the American Society of Nephrology (CJASN), could help physicians protect the health of these young patients, the researchers concluded.

Jun 21
Stick to '5:2 diet' to cut breast cancer risk
Ladies, you may want to reduce your intake of calories for just two days a week as a recent study has suggested that doing so can lower you risk of breast cancer.

The Genesis Breast Cancer Prevention study found that following a low-calorie diet for two days per week or a 5:2 diet can lead to cancer-preventing changes in the breast tissue.

The study saw overweight pre-menopausal women at high risk of breast cancer follow the 2-Day Diet, developed by research dietitian Dr Michelle Harvie and researcher Tony Howell, for one month. The diet features two days on a low-carb, low-calorie diet, with the remaining five days being spent on a healthy, Mediterranean-style diet.

Researchers took breast biopsies on 20 women before and after the four-week trial and found that on average, women lost around half a stone in weight, with 55 per cent of those taking part experiencing changes in their breast cells.

The changes involved the production of proteins that are known to make the cells more stable and less likely to become damaged. Therefore, experts said, the risk of developing breast cancer is reduced.

Dr Harvie noted that further research would need to be done to confirm how the diet could prevent breast cancer, adding "There are a number of reasons why some of the women didn't experience changes in the breast; for example, they may have needed to spend a longer period of time on the diet or perhaps follow a different version of The 2-Day Diet."

The study was published in Breast Cancer Research.

Jun 14
Vitamin deficiencies may up migraines
Deficiencies in certain vitamins are the likely reason behind the development of migraines in children, teens and young adults, finds a new study.

The findings revealed that a high percentage of children, teens and young adults with migraines had mild deficiencies in vitamin D, riboflavin and coenzyme Q10 -- a vitamin-like substance found in every cell of the body that is used to produce energy for cell growth and maintenance.

While girls and young women were more likely to have coenzyme Q10 deficiencies, boys and young men were more likely to have vitamin D deficiency.

Further, patients with chronic migraines were more likely to have coenzyme Q10 and riboflavin deficiencies than those with episodic migraines.

"Further studies are needed to elucidate whether vitamin supplementation is effective in migraine patients in general and whether patients with mild deficiency are more likely to benefit from supplementation," said lead author Suzanne Hagler from Cincinnati Children's Hospital Medical Center in the US.

For the study, the team analysed patients with migraines who had baseline blood levels checked for vitamin D, riboflavin, coenzyme Q10 and folate, all of which were implicated in migraines by previous studies.

Many were put on preventive migraine medications and received vitamin supplementation, if levels were low.

Previous studies have indicated that certain vitamins and vitamin deficiencies may be important in the migraine process. However, studies using vitamins to prevent migraines have had conflicting success.

The results were presented at the 58th Annual Scientific Meeting of the American Headache Society in San Diego, in the US, recently.

Jun 10
Confirmed: Second layer of information in our DNA!
Confirming a long-standing hypothesis, scientists from the Netherlands' Leiden University have shown that the genetic information in the DNA not only determines who we are, but also the DNA mechanics.

Since the mid-1980s it has been hypothesised that there is a second layer of information on top of the genetic code: DNA's mechanical properties.

Each of our cells contains two meters of DNA molecules, so these molecules need to be wrapped up tightly to fit inside a single cell.

The way in which DNA is folded, determines how the letters are read out, and therefore which proteins are actually made.

In each organ, only relevant parts of the genetic information are read, based on how the DNA is folded.

The theory goes that mechanical cues within the DNA structures determine how DNA prefers to fold.

In a study published in the journal PLoS One, Leiden physicist Helmut Schiessel and his research group provided strong evidence that this second layer of information indeed exists.

With their computer code they simulated the folding of DNA strands with randomly assigned mechanical cues.

It turns out that these cues indeed determine how the DNA molecule is folded into so-called nucleosomes.

Schiessel found correlations between the mechanics and the actual folding structure in the genome of two organisms ? baker's yeast and fission yeast.

With this finding we know that evolutionary changes in DNA ? mutations ? can have two very different effects.

The letter sequence encoding for a specific protein can change or the mechanics of the DNA structure can change, resulting in a different packaging and accessibility of the DNA and therefore a different frequency of production of that protein.

Jun 07
Soon, a bitter pill that could help you lose weight!
There could soon be a pill to reduce your calorie consumption as researchers have identified a bitter plant extract that can suppress food intake by stimulating the secretion of gut peptide hormones involved in appetite regulation.

Gut chemosensory mechanisms, particularly those involved in detecting and relaying to the brain the chemical composition of food during digestion, play an important role in regulating appetite and food intake.

The researchers hypothesised that activation of specific bitter taste receptors which are expressed throughout the gastrointestinal tract by hormone secreting 'enteroendocrine' cells, could also regulate food intake by triggering the release of satiety or 'fullness' hormones, a mechanism termed by the team as the "bitter brake."

The study was conducted by John Ingram and colleagues from the New Zealand Institute for Plant & Food Research Limited and University of Auckland, New Zealand.

The team screened over 900 plant extracts for their ability to stimulate enteroendocrine "I cell" hormone release before identifying a highly bitter, non-nutritive plant derived ingredient they have called "Amarasate extract" to take forward into clinical testing.

Twenty lean healthy male volunteers were recruited (mean body mass index 23.4 kg/m2) with 19 completing all three treatments within the randomised, double-blind study.

Treatments comprising 500 mg Amarasate extract or a placebo were administered for targeted intestinal (duodenal) or stomach (gastric) release.

The researchers found that, compared with placebo, both gastric and duodenal delivery of the Amarasate extract stimulated significant increases in the gut peptide hormones CCK, GLP-1 and PYY while significantly reducing total (lunch plus snack) meal energy intake by 218 calories and 226 calories, respectively.

However, no significant treatment effects were observed for any subjective ratings of appetite or nausea.

"We have demonstrated that activation of the 'bitter brake' mechanism by a bitter plant extract can stimulate the release of gut peptide hormones involved in appetite regulation and suppress subsequent feeding behaviour in healthy men," the authors noted.

The findings were presented at the 2016 European Obesity Summit in Gothenburg, Sweden.

Jun 06
Regular exercise keeps brain active, reduces risk of dementia!
One should always indulge in physical activities as it will help them stay fit, energetic and also lead a healthy lifestyle.

Doing regular exercise not only keeps your brain active but also reduces the risk of developing memory loss diseases like dementia.

A new study was conducted on mice and found out that exercise can increase the production of a key protein that helps in keeping the brain active as well as lower the risk of neurological diseases.

The study showed that during the rodents' exercise routine, certain chemicals naturally build up in the brain and kick-start the production of BDNF -- also called "Miracle-Gro" -- for the brain because of its role in enhancing memory and the growth of nerve cells.

Moses Chao, professor at New York University, in the US says, 'We believe that our study shows a precise biological mechanism behind increased BDNF production in mammals due to exercise.'

He added that unravelling the mysteries of BDNF is important as we seek more ways to naturally keep mammalian brains healthy, including those of humans.

Unravelling the mystery of BDNF production to naturally keep mammalian brains healthy, the researchers found that ketone -- a chemical naturally produced in the liver called beta-hydroxybutyrate (DBHB) --, triggers biological reactions that activates the BDNF gene to produce more of its protein.

Also, this DBHB -- which builds up in the body and brain with exercise -- was found to prevent other proteins in the brain known as histone deacetylase complexes, or HDACs, from suppressing BDNF production by altering the environment of the BDNF gene.

For the study, published online in the journal eLife, the team compared the brains of mice that had been allowed to run at will on a cage wheel for a month with the brains of mice that did not run.

"Our findings suggest how we might boost production of BDNF as studies have confirmed that doing so protects the brain," Chao said.

The researchers used commercially available psychiatric drugs already known to stabilize mood and prevent seizures by inhibiting HDACs and "open up" the otherwise "closed" BDNF gene, making it easier to trigger its action and increase BDNF production by as much as 50 percent.

Jun 04
Overweight men at increased risk of prostate cancer
Men should try to maintain a healthy weight as researchers have found that higher body mass index (BMI) and waist circumference are associated with an increased risk of aggressive prostate cancer.

In this study, the researchers investigated the associations between various body measurements at baseline, mainly BMI and waist circumference, and the risk of prostate cancer incidence, with a focus on tumour stage and grade, and on mortality from prostate cancer.

A total of 141,896 men with a mean age at recruitment of 52 years in eight European countries (Italy, Spain, Britain, the Netherlands, Greece, Germany, Sweden and Denmark) were included.

After an average of 14 years of follow-up, there were 7,022 incident cases of prostate cancer of which 934 were fatal.

The researchers focussed on aggressive prostate cancer, looking at cancers with a high grade and cancers which resulted in death (fatal prostate cancer).

Men with a higher BMI and waist circumference had an increased risk of high grade prostate cancer, an aggressive form of the disease -- 10 per cent increased risk for BMI for every five kg/m2 increase and 13 per cent for waist circumference for every 10cm increase.

Furthermore, a 14 per cent higher risk for fatal prostate cancer was observed for every five kg/m2 increase in BMI, and 18 per cent increased risk in every 10 cm increase in waist circumference.

"The findings from this large prospective study show that the association between body size and prostate cancer is complex and varies by disease aggressiveness; men who have greater adiposity have an elevated risk of high grade prostate cancer and prostate cancer death," the researchers noted.

The study by Aurora Perez-Cornago from University of Oxford, and colleagues was presented at the European Obesity Summit in Gothenburg, Sweden.

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