Health
MADRID: Study Identifies Molecule That Stimulates Muscle-Building In Humans
MADRID: In a randomized control study of 10 healthy young men, a team of researchers compared how consuming the single amino acid leucine or its two-molecule equivalent, dileucine, influenced muscle-building and breakdown.
They found that dileucine boosts the metabolic processes that drive muscle growth 42 per cent more than free leucine does.
The findings were published in the Journal of Applied Physiology.
Leucine, isoleucine, and valine all are branched-chain amino acids, famous among bodybuilders and health enthusiasts for their purported muscle-enhancing benefits. Like other amino acids, they are the building blocks of proteins. But leucine also acts as a signaling molecule that triggers muscle-building pathways in cells, said University of Illinois Urbana-Champaign kinesiology and community health professor Nicholas Burd, who led the new research with kinesiology graduate student Kevin Paulussen.
Digestion breaks the chemical bonds between the amino acids that make up proteins, resulting in a stew of shorter molecules, including free amino acids and dipeptides. Previous studies have suggested that the small intestine absorbs dipeptides like dileucine more rapidly than their single-molecule counterparts, Burd said.
“But few studies have examined whether dileucine in the diet makes it into the blood as a dipeptide or is first broken down into two leucine molecules,” he said. “And no studies have examined its effects on acute muscle-building and breakdown.” Burd’s laboratory is one of a small number of research facilities set up to study muscle protein metabolism in human participants.
For the new study, participants came to the lab after a 12-hour fast and were infused with stable isotopes, chemical probes that allow researchers to track the process of muscle protein synthesis and breakdown in their muscles. Then biopsies of muscle tissue were taken from the upper leg.
“After that, we fed them either 2 grams of leucine or 2 grams of dileucine,” Burd said. “And we studied their muscle-remodeling response for three hours.” This was a double-blind study, meaning that the data were coded to prevent participants and researchers from knowing who received leucine or dileucine in the initial phases of the study. Three more muscle biopsies were taken, at 30, 60 and 180 minutes after participants ingested the leucine or dileucine.
“We found that leucine got into the blood more quickly when participants consumed dileucine than if they had just free leucine,” Burd said. “That means that some of that dileucine is getting hydrolyzed, or cut up before it gets into the bloodstream. But we also saw that dileucine was getting into the bloodstream intact.”
The next question was whether dileucine had any effect on muscle-building processes, he said.
“So, we looked at pathways that signal the muscle-building process, including protein breakdown as part of the remodeling process. And we found no difference in protein breakdown between the leucine alone and the dileucine condition,” Burd said. “But on the protein synthesis side, we saw that dileucine turns up the muscle-building process more than leucine does.”
Those who consumed dileucine had 42 percent more synthesis of new muscle proteins than those who ingested only leucine.
“To put that in perspective, exercise alone can cause a 100-150 per cent increase in the muscle-building response,” Burd said.
The researchers also showed that animal-based proteins are the best source of dileucine in the diet. But Burd does not think people should start ingesting large amounts of animal protein or taking dileucine supplements to enhance their muscle metabolism.
The study is only a first step toward understanding how the body uses dipeptides, “and focusing on a single nutrient doesn’t provide a perspective on how the overall diet and eating pattern impacts muscle growth,” he said.
“We don’t yet know the mechanism by which dileucine works, this is just a first attempt to understand how these types of peptides are playing a role in human physiology,” Burd said.
Health
WASHINGTON: Social Media Has Direct Impact On Mental Health- US Surgeon General To NDTV
WASHINGTON: There is a direct connection between social media use and mental health, especially among teenagers, the US Surgeon General Vice Admiral Vivek Murthy said. He said that his office had even issued an advisory in this regard, appealing for more focus on this very concerning issue.
The US Surgeon General is the doctor to all of the United States of America. The Surgeon General is consulted by the President of the US on all public health issues and health-related emergency matters. It is one of the topmost posts in the US and is responsible for America’s overall healthcare system, new technology in the sector, and scientific advancement in medicine.
The current Surgeon General, Vice Admiral Vivek Murthy spoke on a range of issues, including a growing mental health crisis globally and how social media impacts it.
“There is a need to protect our children,” the Surgeon General said, adding that it is a priority for him and his department to “make mental health the priority that it needs to be.” He said that “Many countries are struggling with mental health crisis, with many cases of depression, anxiety, and sadly suicide.”
‘THE STIGMA’
Vice Admiral Murthy explained that his advisory aims to focus on the “stigma around mental health”, which he says “makes it harder for patients to talk about it at home with their families, and makes their struggle harder because not often can they ask for the help they need.”
As an increasing number of young adults are battling mental health issues globally, the top doctor of the United States said, “Fundamentally what we have to do is to see mental health for what it is – It is part of our overall health, and mental health is just as important to a person as their physical health is, and must be treated with the urgency and priority that it deserves.”
‘GENERATIONAL DIFFERENCES, COMMUNITY OUTLOOK’
“Older generations are not always used to talking about mental health issues,” the Surgeon General said, acknowledging that “different generations look at mental health differently, as do different communities.”
“While older generations do not talk about it openly, the younger generations are far more open and sensitive to mental health challenges,” he said.
Speaking about cultural views on mental health and the stigma attached to it, Vice Admiral Murthy said, “We see a lot of cultural differences when it comes to viewing mental health issues. My family is originally from India, and the Indian-American community which I grew up in, we never spoke about mental health issues. In fact, it was something that was seen as a source of shame.”
Giving an example of his own experience of the stigmatisation of mental health challenges, he said, “I had an uncle who sadly lost his life to suicide. I remember the sense of shame around the family that something like this had happened. There was so much concern about telling other people what had happened because of what they would think about the family. That kind of stigma and the message it sends to both young and old people, is that these issues are just not okay to talk about.”
“We need to change this. I aim for a day where we can talk about the mental health issues we face just as easily as we would about a sprained ankle or heart disease. We need to talk about it with the same amount of openness” he said.
‘BUILDING BLOCKS OF A FULFILLING LIFE’
Young people are under tremendous pressure and stress of performing well in life, said the top doctor, and so, I asked a lot of young adults what success means to them, he added.
“We need to ask ourselves what we are doing to define success for young people in order to help them having a fulfilling life. When I spoke to young people in the US, many of them said they feel they are being asked to hustle behind a definition of success that is largely dependent on – ‘How much money you make’, ‘How much fame you can acquire’, and ‘How much power can you attain’ – And while there is nothing wrong in wanting to amass power, fortune and fame, if we feel that that is what is going to lead to long-term fulfilment, unfortunately life’s experiences and challenges tends to make us feel the other way,” he said.
“So, if we really want our children to be truly and deeply fulfilled, the thing we need to increasingly think about is – How can we help them build a life that is focussed on meaning, on purpose, on service, and on community – because these are the building blocks of fulfilment that we all ultimately want for our children,” he explained.
THE ESSENTIAL INGREDIENT TO MANAGE STRESS
Delving on the issue of stress and the pressures faced by young individuals, Vice Admiral Murthy said, “We need to see and understand where the pressures being faced by our children are coming from. We also need to mitigate and manage them to make the environment that our children are growing up in much more hospitable and welcoming.”
Explaining his statement, he added, “One of the things we know is that pressure is a lot easier to deal with – stress in general, is a lot easier to deal with when we have social support around us. Which is why the issues of loneliness and isolation being a broader epidemic is a serious problem in the US and increasingly across the world.”
SUICIDE – THE DEEPEST PAIN, A GLOBAL EPIDEMIC
Speaking about an ever-increasing suicide rate globally, the Surgeon General said, “Suicide is one of the most painful consequences of all of the broader mental health challenges we are facing today. The thought of losing your child to suicide is the deepest pain for any parent to deal with.”
He further explained that “Suicide deaths have increased significantly across the world in the last two decades.” This, he says, is due to several reasons:
- Loneliness has become a profound issue among children. It affects the entire population, but is hitting young people the hardest. It is now an epidemic across the world.
- The impact of violence and the fear of violence – Over 50 per cent children in the US now fear a school shooting.
- Negative news and mobile phones – Most children today carry or have access to smartphones that are constantly buzzing with negative and violent headlines which make them feel like their life and the future is bleak because nothing positive is happening around the world.
- Most of all, Technology and Social Media – Children are, on average, spending more than 3 hours a day on social media. By doing so, they face double the risk of depression and anxiety. It is one of the many reasons we have to address the harms of social media.
‘WE’VE FAILED AS A SOCIETY’
Social media algorithms are what make these platforms so addictive. These algorithms have a direct impact on the brain and the hormones secreted by it. But there are no laws to keep these algorithms in check. While even smoking or drinking have their own set of laws to not pose a risk to the public, social media firms have no such rules to bind them from using their algorithms indiscriminately.
Elaborating on the challenges faced in combating the harms of social media, the Surgeon General said, “For the last 20 years that social media has been around, we have broadly failed as a society to ensure that social media companies meet safety standards.”
Giving the example of cars, Vice Admiral Murthy explained that “Cars have a basic level of safety and standards in place. These standards ensure that that brakes are working, the seat belts and the engine are in sound condition, the frame of the car is such it protects the occupants of the vehicle. But we do now have anything like that, especially in the US, when it comes to checks and balances for social media. There are no safety standards to protect children in particular from its harmful effects.”
“The entire burden of checks and balances for social media are entirely on kids and parents. Not only is that unfair, but is ineffective, and we can see that from how it is manifesting today,” he said.
Health
TORONTO: Protein May Help Age-Related Diseases, Indian-Origin Scientist Discovers
TORONTO: A team of researchers, led by an Indian-origin scientist, has discovered a new function of a protein that may treat age-related illnesses.
The team from McMaster University in Canada found a previously unknown cell-protecting function of a protein, which could open new avenues for treating age-related diseases and lead to healthier ageing.
According to the study published in the journal Proceedings of the National Academy of Sciences, cells can create proteins incorrectly, and the cleanup process can become faulty or overwhelmed.
As a result, proteins can clump together, leading to a harmful buildup that has been linked to such diseases as Alzheimer’s and Parkinson’s.
“If the cells are experiencing stress because this protein aggregation has started, the endoplasmic reticulum, which is where proteins are made and then released, gets the signal to stop making these proteins,” said Professor Bhagwati Gupta who supervised the research.
The team found that a class of protective proteins known as MANF plays a role in the process that keeps cells efficient and working well. Previous studies have shown that MANF protects against increased cellular stress.
The team set out to understand how this happens by studying microscopic worms known as C. elegans. They created a system to manipulate the amount of MANF in C. elegans.
The team discovered that MANF plays a key role in the cell’s disposal process by helping to break down the accumulated proteins, keeping cells healthier and clutter-free. Increasing MANF levels also activates a natural clean-up system within cells, helping them function better for longer.
“Although our research focused on worms, the findings uncover universal processes. MANF is present in all animals, including humans. We are learning fundamental and mechanistic details that could then be tested in higher systems,” said Shane Taylor, now a post-doctoral fellow at the University of British Columbia.
To develop MANF as a potential therapy, researchers want to understand what other players MANF interacts with. “Discovering MANF’s role in cellular homeostasis suggests that it could be used to develop treatments for diseases that affect the brain and other parts of the body by targeting cellular processes, clearing out these toxic clumps in cells and maintaining their health,” said Gupta.
Health
LONDON: Indian-Origin Teen In UK Gets “Life-Changing” Cancer Treatment
LONDON: Yuvan Thakkar, an Indian-origin teenager diagnosed with cancer, says he is now able to enjoy the things he loves after life-changing treatment thanks to a fund set up by the UK’s state-funded National Health Service to make innovative therapies accessible to thousands of patients.
According to NHS England, 16-year-old Mr Thakkar from Watford near London was the first child in the UK to benefit from a pioneering CAR T therapy called tisagenlecleucel (Kymriah) thanks to its Cancer Drugs Fund (CDF).
It comes as the National Health Service (NHS) marks a milestone this weekend of 100,000 patients benefitting from early access to the latest and most innovative treatments with the help of CDF. The undisclosed cost of such treatments is covered by the fund.
“My life has changed so much since I received the CAR T therapy,” said Mr Thakkar, who thanked Great Ormond Street Hospital (GOSH) in London for the “incredible” care he received.
“I remember I had to take so many trips to hospital and had long periods out of school… They have helped me recover to a state where I am able to enjoy so many things I love doing, such as playing snooker or pool, meeting friends and family, and going on wonderful holidays. It’s hard to imagine how things would have been if the treatment wasn’t available,” he said.
Mr Thakkar, diagnosed with a form of leukaemia aged six, received a treatment which modifies a person’s immune cells to recognise and attack cancer cells.
His treatment began in 2019, when he was 11 years old after he relapsed following other treatments such as chemotherapy and a bone marrow transplant. His mother Sapna said the family had received a “second chance” at life since the success of the treatment. Without the fast-track access available through the CDF, the 45-year-old said there may have been no other way for her son to receive the life-saving treatment.
“It felt like our prayers were finally answered. We still feel so grateful for this chance that’s been given to us and not a single day passes by when we haven’t felt thankful for all the doctors and nurses that have helped us through this long and difficult journey,” said Sapna Thakkar.
The CDF, which opened in its current form in July 2016, is used by NHS England to provide fast-tracked access for patients to all new cancer treatments approved by the National Institute for Health and Care Excellence (NICE), in addition to gathering further evidence of long-term effectiveness for promising drugs. It allows faster access to more than 100 drugs to help improve, extend or – in some cases – save their lives.
“Treating 100,000 cancer patients in England with innovative treatments through the Cancer Drugs Fund is a fantastic milestone for the health service to reach, and testament to the hard work of oncologists and their teams across the country,” said Professor Sir Stephen Powis, NHS national medical director.
“This vital fund is helping ensure patients get access to the most promising drugs far quicker than would otherwise be the case, helping people with cancer like Yuvan receive a life-changing intervention that sets a path for a longer, healthier life spent with family and friends,” he said.
The fund benefits people with common cancers, such as breast, lung, colorectal and prostate, as well as those with less common cancers, such as ovarian, cervical, kidney, skin, myeloma, lymphoma and leukaemia, and rare cancers, including thyroid and biliary tract.
The current CDF budget of GBP 340 million is 70 per cent more than the previous CDF and is used alongside NHS England’s Innovative Medicines Fund of GBP 340 million, which the health service said means a total of GBP 680 million is ringfenced for fast-tracking new medicines.
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