High fat diet may cause changes in the brain: study

October 24, 2016

Washington, Oct 24: In a recent study, scientists have discovered a new mechanism that regulates obesity. The study shows that this new mechanism can potentially be targeted to treat obesity.

highfatSenior author of the study Makoto Fukuda said, "It's well known that the brain is involved in the development of obesity, but how a high-fat diet changes the brain so it triggers the accumulation of body fat is still unclear."

The team studied the mouse Rap1 gene, which is expressed in a variety of tissues, including the brain where it is involved in functions such as memory and learning. Little was known, however, of the role brain Rap1 plays in energy balance.

To explore the role Rap1 plays in a mouse model, the scientists selectively deleted the Rap1 gene in a group of neurons in the hypothalamus, a region of the brain that is involved in regulating whole-body metabolism.

The scientists had two groups of mice. In one group, the mice were genetically engineered to lack the Rap1 gene, while the control group had a functional Rap 1 gene. Then, the scientists fed the mice in both groups a high-fat diet in which 60 percent of the calories came from fat.

As expected, the control mice with a working Rap1 gene gained weight, but, in comparison, the mice that lacked Rap 1 had markedly reduced body weight and less body fat. Interestingly, when both groups of mice were fed a normal diet, both showed similar weights and body fat.

The scientists then looked closer at why the mice lacking the Rap1 gene had not gained weight despite eating a high-fat diet.

"We observed that the mice lacking Rap1 were not more physically active. However, they ate less and burned more body fat than mice with Rap1," said Fukuda.

Adding, "These observations were associated with the hypothalamus producing more of a hormone that reduces appetite, called POMC, and less of hormones that stimulate appetite, called NPY and AgRP." These mice also had lower levels of blood glucose and insulin than controls.

The scientists also were interested in studying whether leptin changed in mice lacking Rap1.

Leptin, the 'satiety hormone' produced by fatty tissue, helps regulate body weight by inhibiting appetite. Obese people, however, do not respond to leptin's signals of satiety, and the blood levels of leptin are higher than those in non-obese people. Leptin resistance is a hallmark of human obesity.

Mice that lacked Rap1 and ate a high-fat diet, on the other hand, did not develop leptin resistance; they were able to respond to leptin and this was reflected in the hormone's lower blood levels.

The team also tested the effect of inhibiting Rap1 with drugs instead of deleting the gene on mice on a high-fat diet. The scientists inhibited RAP1 action with inhibitor ESI-05.

"When we administered ESI-05 to obese mice, we restored their sensitivity to leptin to a level similar to that in mice eating a normal diet. The mice ate less and lost weight," he said.

The scientists have shown a new mechanism by which the brain can affect the development of obesity triggered by consuming a high-fat diet.

Consuming a high-fat diet results in changes in the brain that increase Rap1 activity, which in turn leads to a decreased sensitivity to leptin, and this sets the body on a path to obesity.

"This new mechanism involving Rap1 in the brain may represent a potential therapeutic target for treating human obesity in the future," said Fukuda.

The study appeared in Cell Reports today.

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News Network
February 22,2020

Feb 22: The subjective feeling of well-being experienced by many people with the practice of meditation is associated with specific changes in the brain, according to a study which may lead to better clinical recommendations of the practice.

The study, published in the journal Brain and Cognition, examined the effects of the technique known as Transcendental Meditation (TM), which consists of the silent repetition of a meaningless sound.

In the study, the researchers from the IMT School for Advanced Studies Lucca in Italy, enrolled 34 healthy young volunteers and divided them in two groups.

They said the first group practised TM 40 minutes per day in two sessions of 20 minutes each, one in the morning and the other in the evening.

The second group, the scientists said, did not change its daily routine.

Using questionnaires, they also measured the anxiety and stress levels of all the participants at the beginning of the study, as well as the subjects' ability to manage stressful situations.

According to the researchers, the participants were also subjected to a functional magnetic resonance imaging (fMRI) brain scan, in order to measure the organ's activity at rest, and changes in the excitation among different cerebral areas.

They repeated the tests after three months, at the end of the study.

According to the study, the levels of anxiety and stress perceived by the subjects who followed the meditation program were significantly reduced in comparison with those of the volunteers who did not practice TM.

"Magnetic resonance imaging also shows that the reduction of anxiety levels is associated with specific changes in the connectivity between different cerebral areas, such as precuneus, left parietal lobe and insula, which all have an important role in the modulation of emotions and inner states," said study co-author Giulia Avvenuti from the IMT School for Advanced Studies Lucca.

"In the control group, instead, none of these changes was observed. The fact that Transcendental Meditation has measurable effects on the 'dialogue' between brain structures involved in the modulation of affective states opens new perspectives for the understanding of brain-mind relationships," said Pietro Pietrini, IMT School's Director, and co-author of the study.

"It also extends the results of recent research suggesting that drugs therapies and psychotherapy leverage on the same biological mechanism," Pietrini said.

According to the researchers, even a few months of practice of TM can have positive effects which can be correlated with measurable changes in the brain.

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Agencies
April 25,2020

An uncertain prognosis, severe shortage of resources and the imposition of unfamiliar public health measures that infringe on personal freedoms along with large and growing financial losses are undoubtedly contributing to the widespread psychological and emotional distress associated with COVID-19.

The COVID-19 pandemic has forced millions of people to work from home world-wide. Today, due to constant exposure to increasing numbers, an intense fear of contamination have a massive psychological impact on people who are working from home.

Kuhoo Gupta, Healer and Founder of The K Junction talks about wellness during work from home as the situation is resulting in people being vulnerable to severe mental illnesses. Staying positive and optimistic while working from home during pandemic can be heavily challenging.

Gupta states its critical to maintain your mental well-being and immune system, as people with mental upheavals are prone and susceptible to various flu or inflammations. Your bodies immune system reacts abnormally which diminishes the capability of it's function.

The only key to manifesting a wonderful well-being is to try and calm one's mind and focus on constructive and wellness activities, to find a path towards making ourselves more resilient while working from home. Gupta shares 5 tips you can start doing today to improve and enhance your positive outlook.

Remember! Your workplace should be a sacred space where you are able to find a sense of comfort in your work environment. It should help you feel positive, healthier and happier, more like a protective zone.

Fabricating a Positive Workstation

There should be a separate workstation so that one can concentrate while working from home. It would be great if the work desk is stationed somewhere near a window or a balcony door so that one can welcome sunlight, fresh air and a view of plants & birds during the day. Try to have an ergonomic setting of your table and chair so that you keep your posture right while working the whole day. Keeping one or two indoor plants near your work desk will help to make it interesting.

Keep your laptop charger wires and other stuff neatly on your desk to avoid overwhelming yourself. Motivation quotes around you will help to make you overall positive. Keep your notes diary and pen handy at your desk. It will always helps to keep some colorful artifacts around you to make the atmosphere a little cheerful.

Declutter Your Workstation

Avoid the pilling up files and unnecessary stationery at your workstation. Clutter is responsible for the confusion and problems all around and it leads to distraction; thus, a clean desk reflects power which enhances positivity and creates a tranquil workspace that will help your mind focus on productivity. It is important to declutter your work desk once in a few days because physical clutter translates to mental clutter.

Gratitude Notes in workstation and how to manifest

It is a great morning practice to write at least five things you are grateful for. It helps to shift the focus from negative to positive, from scarcity to abundance. One can write gratitude statements on Post it notes and put them at the work daily. This will raise the vibrations and help you stay grounded and positive. You can also compile affirmations and prayers that you resonate. Whenever you take work breaks, it is a good idea to read these.

Crystals to imbibe positivity at workstation

Selenite is a great crystal to spread light and positivity around. Black tourmaline absorbs negativity and is great to shield you from it during lockdown. Shungite is a great crystal to reduce the effects of electromagnetic radiations around you. You can place it near your wifi router, laptop and other devices to reduce the EMF pollution effects on you and your family. Clear quartz is great for energizing you after a tiring meeting. Just hold it in your left hand with eyes closed for five minutes and visualise beautiful energy entering your body and soul.

You can combine this exercise by holding black tourmaline in your right hand and visualize all the tiredness and unwanted energy draining into the black tourmaline. Tiger eye is very effective in eliminating the scattered brain and it allows us to make confident decisions. Green Aventurine neutralizes stress and anxiety from work, allowing us to keep calm.

Lepidolite is known as the Peace Stone, making it one of the best crystals for peace. It improves our overall mood, calms us, soothes us, and reduces our anxiety with a peaceful sense of happiness.

Sodalite is a great crystal for peace because it turns fear and stress into peaceful feelings. It also helps in better communication and can help while making crucial presentations & meetings.

Fluorite is great for healing and rejuvenating the mind and body. You can close your eyes and sit quietly with Fluorite while imagining your body being filled with an incredible energy that puts you at ease with yourself and the world.

Pyrite, also known as abundance stone, is great to put over your business card to manifest abundance at work.

Don't forget to clean your crystals regularly to harness their maximum energy.

Meditate, Do Pranayam and Stay Hydrated!

It is important to take short breaks to maintain productivity at work. Being summer, it is a good idea to get up for a water break once in 30 minutes at least. Even if you keep a water bottle alongside you, walking to the kitchen for water will help your physical body get some much needed movement.

Few iterations of square breathing once in two hours is a great way to boost your mind and body. Square breathing is basically the sequence of inhalation - holding breath - exhalation - holding breath - all for equal time spans. So you can count mentally 1 to 4 in inhalations, then again counting 1 to 4 as you hold your breath, and so on and so forth.

You can also chant any mantra while taking a work break for 1 or 2 minutes. While attending online meetings, where there is nothing much your hands are doing, you can utilize that time to do Yoga Hast/Hand Mudras and harness their energies. Pran Mudra is one of the best options to practice while attending meetings or reading articles, where your hands are free essentially.

You can Also -

Dress up like you would do while going to office so as to feel good in general

Go out on your terrace/balcony once or twice a day to get some fresh air, sunlight and hear birds chirping

Say yes to distractions rather than getting irritated from them, because you cannot avoid them while working from home, like the kids, TV sounds, kitchen sounds etc.

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Agencies
May 8,2020

As Europe and the US loosen their lockdowns against the coronavirus, health experts are expressing growing dread over what they say is an all-but-certain second wave of deaths and infections that could force governments to clamp back down.

"We are risking a backslide that will be intolerable," said Dr Ian Lipkin of Columbia University's Center for Infection and Immunity.

Around the world, German authorities began drawing up plans in case of a resurgence of the virus. Experts in Italy urged intensified efforts to identify new victims and trace their contacts. And France, which has not yet eased its lockdown, has already worked up a "reconfinement plan" in the event of a new wave.

"There will be a second wave, but the problem is to which extent. Is it a small wave or a big wave? It is too early to say," said Olivier Schwartz, head of the virus unit at France's Pasteur Institute.

In the US, with about half of the states easing their shutdowns to get their economies restarted and cellphone data showing that people are becoming restless and increasingly leaving home, public health authorities are worried.

Many states have not put in place the robust testing that experts believe is necessary to detect and contain new outbreaks. And many governors have pressed ahead before their states met one of the key benchmarks in the Trump administration's guidelines for reopening -- a 14-day downward trajectory in new illnesses and infections.

"If we relax these measures without having the proper public health safeguards in place, we can expect many more cases and, unfortunately, more deaths," said Josh Michaud, associate director of global health policy with the Kaiser Family Foundation in Washington.

Cases have continued to rise steadily in places such as Iowa and Missouri since the governors began reopening, while new infections have yo-yoed in Georgia, Tennessee and Texas.

Lipkin said he is most worried about two things: the reopening of bars, where people crowd together and lose their inhibitions, and large gatherings such as sporting events, concerts and plays. Preventing outbreaks will require aggressive contact tracing powered by armies of public health workers hundreds of thousands of people strong, which the US does not yet have, Lipkin said.

Worldwide the virus has infected more than 36 lakh people and killed over a quarter-million, according to a tally by Johns Hopkins University that experts agree understates the dimensions of the disaster because of limited testing, differences in counting the dead and concealment by some governments.

The US has recorded over 70,000 deaths and 12 lakh confirmed infections, while Europe has reported over 140,000 dead.

This week, the researchers behind a widely cited model from the University of Washington nearly doubled their projection of deaths in the US to around 134,000 through early August, in large part because of the easing of state stay-at-home restrictions. Newly confirmed infections per day in the US exceed 20,000 and deaths per day are running well over 1,000.

In hard-hit New York City, which has managed to bring down deaths dramatically even as confirmed infections continue to rise around the rest of the country, Mayor Bill de Blasio warned that some states may be reopening too quickly.

"My message to the rest of the country is learn from how much effort, how much discipline it took to finally bring these numbers down and follow the same path until you are sure that it is being beaten back," he said on CNN, "or else, if this thing boomerangs, you are putting off any kind of restart or recovery a hell of a lot longer."

A century ago, the Spanish flu epidemic's second wave was far deadlier than its first, in part because authorities allowed mass gatherings from Philadelphia to San Francisco.

"It is clear to me that we are in a critical moment of this fight. We risk complacency and accepting the preventable deaths of 2,000 Americans each day," epidemiologist Caitlin Rivers, a professor at Johns Hopkins, told a House subcommittee in Washington.

President Donald Trump, who has pressed hard to ease the restrictions that have throttled the economy and thrown more than three crore Americans out of work, pulled back Wednesday on White House plans revealed a day earlier to wind down the coronavirus task force.

He tweeted that the task force will continue meeting indefinitely with a "focus on SAFETY & OPENING UP OUR COUNTRY AGAIN".

Underscoring those economic concerns, the European Union predicted the worst recession in its quarter-century history. And the US unemployment rate for April, which comes out on Friday, is expected to hit a staggering 16 per cent, a level last seen during the Great Depression of the 1930s.

Governors continue to face demands, even lawsuits, to reopen. In Michigan, where armed demonstrators entered the Capitol last week, the Republican-led Legislature sued Democratic Governor Gretchen Whitmer, asking a judge to declare invalid her stay-at-home order, which runs at least through May 15.

In hard-hit Italy, which has begun easing restrictions, Dr Silvio Brusaferro, president of the Superior Institute of Health, urged "a huge investment" of resources to train medical personnel to monitor possible new cases of the virus, which has killed about 30,000 people nationwide.

He said that contact-tracing apps which are being built by dozens of countries and companies are not enough to manage future waves of infection.

German Chancellor Angela Merkel said after meeting with the country's 16 governors that restaurants and other businesses will be allowed to reopen in the coming weeks but that regional authorities will have to draw up a "restriction concept" for any county that reports 50 new cases for every 100,000 inhabitants within a week.

Lothar Wieler, head of Germany's national disease control centre, said scientists "know with great certainty that there will be a second wave" of infections.

Britain, with over 30,000 dead, the second-highest death toll in the world behind the US, plans to extend its lockdown but has begun recruiting 18,000 people to trace contacts of those infected.

In other developments, the US Centers for Disease Control and Prevention said nearly 5,000 coronavirus illnesses and at least 88 deaths have been reported among inmates in American jails and prisons. An additional 2,800 cases and 15 deaths were reported among guards and other staff members.

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