The whitening and loss of brown adipose tissue (BAT) during obesity and aging promote metabolic disorders and related diseases. The imbalance of Ca²⁺ homeostasis accounts for the dysfunction and clearance of mitochondria during BAT whitening. Capsaicin, a dietary factor activating TRPV1, can inhibit obesity induced by high-fat diet (HFD), but whether capsaicin inhibits BAT loss and the underlying mechanism remain unclear. In this study, we determined that the inhibitory effects of capsaicin on HFD-induced obesity and BAT whitening were dependent on the participation of SIRT3, a critical mitochondrial deacetylase. SIRT3 also mediated all of the beneficial effects of capsaicin on alleviating reactive oxygen species generation, elevating mitochondrial activity, and restricting mitochondrial calcium overload induced by HFD. Mechanistically, SIRT3 inhibits mitochondrial calcium uniporter (MCU)-mediated mitochondrial calcium overload by reducing the H3K27ac level on the MCU promoter in an AMPK-dependent manner. In addition, HFD also inhibits AMPK activity to reduce SIRT3 expression, which could be reversed by capsaicin. Capsaicin intervention also inhibited aging-induced BAT whitening through this mechanism. In conclusion, this study emphasizes a critical role of the AMPK/SIRT3 pathway in the maintenance of BAT morphology and function and suggests that intervention in this pathway may be an effective target for preventing obesity- or age-related metabolic diseases.

The signing of veteran outfielder Michael Brantley by the Astros came a week after the Winter Meetings and only a few days before Christmas, meaning it didn't exactly garner much attention on national, or even local, news cycles. For the Astros, Brantley was exactly the player they needed at exactly the right price -- two years and $32 million -- and the kind of addition that should fire up the fanbase.

Fans and analysts spend the entire offseason speculating where the top free agents could go, but sometimes an under-the-radar pickup can end up making a world of difference. As positional competitions begin to heat up at Spring Training camps this month, MLB.com's beat writers were asked to identify one potentially overlooked acquisition for each of the 30 clubs. Here's who they came up with.

There won't be many roster battles when the Astros open camp later this week, and they won't be decided until the final days of the team's stay in West Palm Beach, Fla. Houston has an open competition for its fifth starter spot heading into Spring Training, and the club also has to sort out a crowded outfield and the final spots in the bullpen.

The reality is setting in for Astros star second baseman Jose Altuve, who's shared a clubhouse with close friend Marwin Gonzalez for the previous seven springs. They became confidants on and off the field, which is what makes this spring so strange.

With this many stars and this much talent, you can't help but have visions of playing baseball deep into October. And considering it was only a year ago the Astros were talking about defending their World Series title, their window to win another one remains wide open.

Spring Training is underway. Players around the league are stepping back onto the baseball field as they get ready for the 2019 season. MLB.com's beat reporters have you covered with the action from every team's training camp. Keep track of the latest highlights of Spring Training right here.

Gerrit Cole and Justin Verlander are not fans of the "opener" and explained why it's not a long-term option.

Who do the Astros have in the pipeline? Get scouting reports, video, stats, projected ETAs and more for Houston's Top 30 Prospects on MLB Pipeline's Prospect Watch.

The next five weeks will see lots of shuffling on Major League rosters. Here are the most intriguing positional battles on each of the 30 MLB clubs.

Astros outfielder Josh Reddick vows to start hitting to the opposite field more this year, which is something he did well in 2017, but not '18. Reddick hit .242 with 17 homers and 47 RBIs last year after hitting .314 with 13 homers and 82 RBIs to help the Astros to the World Series title in '17.

It took only two words for Alex Bregman to send 9-year-old Jax Nystrom into a frenzy, but this kind of reaction -- young people freaking out at the slightest bit of attention from him -- has become commonplace for the Astros' All-Star third baseman.

NEW YORK (AP) — Uber is cutting 3,700 full-time workers and its CEO will give up his base salary with the nation largely still in lockdown. The San Francisco company said Wednesday that the layoffs and related costs like severance will reach...

Jamaica Football Federation (JFF) general secretary Dalton Wint says that any potential changes to the Concacaf hexagonal round for the FIFA World Cup qualifiers could present challenges to the nation’s aim of qualifying for Qatar 2022. Wint’s...

With improved survival and and ageing population, the number of people living with coronary heart disease in the UK has increased to an estimated 2.3 million. There is increasing evidence that cardiac rehabilitation benefits these patients, and as such it has been included in international clinical guidelines. ​In this podcast, we're joined by...

Europe's common agricultural policy (CAP) on sugar is due to change, and Emilie Aguirre, from the UKCRC Centre for Diet and Activity Research at the University of Cambridge, argues that an influx of cheap high fructose corn syrup (HFCS, isoglucose) into the European market will have a negative effect on on the health of the continent. Read the...

As the junior doctors in England strike, concerns for the workforce are foremost in the minds of those running the NHS. A summary is available here: http://www.bmj.com/content/352/bmj.i1510 In The BMJ roundtable, recorded at the Nuffield Trust Health Policy Summit on Friday 4 March 2016, we asked our participants if they think the NHS is in...

Gareth Iacobucci talks to Candace Imison, director of policy at The Nuffield Trust, about the problems facing GPs, and how primary care could be changed. "5 minutes with... Candace Imison": http://www.bmj.com/content/352/bmj.i1378

As France has moved in recent weeks to clear camps where migrants stay while trying to cross illegally into Britain, Médecins Sans Frontières has just opened a new one. Sophie Arie talks to Caroline Gollé, medical coordinator at the Médecins Sans Frontières​ La Linière camp​. Read more about the camp: http://www.bmj.com/content/352/bmj.i1696

James Barrett, president of the British Association of Gender Identity Specialists, and Nina, a trans woman, join us to discuss how difficult it can be for trans people to access gender clinics, and what barriers are faced by the community after their transition has been completed. Read James Barrett's personal...

In February World Health Organization (WHO) declared the microcephaly epidemic in South America an international public health emergency. Today, the US Centers for Disease Control and Prevention, the CDC, has confirmed that it’s is Zika virus which is causing that microcephaly.  The outbreak was originally spotted in Recife, in Brazil, and it’s...

Travellers’ diarrhoea is one of the most common illnesses in people who travel internationally, and depending on destination affects 20-60% of the more than 800 million travellers each year. In most cases the diarrhoea occurs in people who travel to areas with poor food and water hygiene. Mike Brown, consultant in infectious diseases and tropical...

We do we know about the weekend effect? As Martin McKee puts it in an editorial on thebmj.com, "almost nothing is clear in this tangled tale" In this roundtable, Navjoyt Ladher, Analysis editor for The BMJ is joined by some of the key academics who have published research and commented on the weekend effect to make sense of what we know and...

The "internal market" was created after the 1987 UK general election focused attention on inadequate funding in the NHS, long waiting lists for elective surgery, and large unwarranted variations in clinical care. Economists attributed these problems to a lack of incentives for efficiency, and the remedies offered included increasing competition...

We’re taught that patients' ideas, concerns, and expectations are central to a successful consultation, but has ICEing gone too far? A “What your patient is thinking” article published this week talks about the pressure that asking questions in the wrong way can put on a patient. Sophie Cook, education editor for The BMJ, is joined by the author...

Lily was diagnosed at 14 years old with stage four Hodgkin's lymphoma and received six rounds of chemotherapy and two weeks of radiotherapy. She survived but now lives with the long term effects of that therapy - and joins us to discuss how it has impacted her quality of life. We're also joined by Saif Ahmad and Thankamma Ajithkumar, oncologists...

The UK government published its report Childhood Obesity: a Plan for Action, in August 2016. A new analysis article takes them to task for the inadequacy of that response to a growing problem. Neena Modi is a professor of neonatal medicine, at Imperial College London, and president of the Royal College of Paediatrics and Child Health, and joins...

The BMJ has published a series of articles, taking an in-depth look at health in South Asia. In this collection, authors from India, Pakistan, Nepal, Bangladesh, Sri Lanka, and Afghanistan collaborate to identify evidence-based solutions to shape health policy and interventions, and drive innovations and research in the region. In this podcast,...

Our latest debate asks whether there should be a Royal Commission (a high level enquiry, with statutory powers) into the future of the NHS. A high level inquiry could detoxify the radical changes needed and command wide support, say Maurice Saatchi, conservative peer, and Paul Buchanan, The BMJ's patient editor; but Nigel Crisp, independent peer,...

"Too many research studies are poorly designed or executed. Too much of the resulting research evidence is withheld or disseminated piecemeal. As the volume of clinical research activity has grown the quality of evidence has often worsened, which has compromised the ability of all health professionals to provide affordable, effective, high value...

The increase in life expectancy in England has almost “ground to a halt” since 2010 and austerity measures are likely to be a significant contributor. In this podcast Michael Marmot, director at University College London’s Institute of Health Equity, joins us to discuss what might be causing that drop off, and why a decrease in early life chances...

If you google "The NHS" you'll see screaming headlines from the Daily Mail about cost and waste - debate in parliament is about how much of our GDP we should be spending - and each year, hospital trusts go cap in hand to ask for more funding. Against this backdrop, a new analysis, and a first in a series, published on bmj.com, looks at what it...

A new Rapid Recommendation from The BMJ suggests that for pregnant women, they may wish to avoid certain antiviral treatments for HIV. This recommendation differs from the WHO's, and to discuss why that is, and what makes that difference important, we're joined by Reed Siemieniuk, a physician and methodologist from McMaster University, and Alice...

Assessing young people with possible eating disorders can be complex for a variety of reasons. Building a therapeutic relationship with a young person with a possible eating disorder and their family is key to enabling a thorough assessment and ongoing management, but it introduces difficult issues regarding confidentiality and risk. In this...

Average body temperature is 37°C, right? That was the conclusion of Carl Wunderlich in his magnum opus, The Course of Temperature in Diseases - Wunderlich published that in 1868, following his extensive collection of body temperature readings - and 37°C stuck. But, it’s not as simple as that Philip Mackowiak, emeritus professor of medicine, and...

Many older adults have difficulty understanding speech in acute healthcare settings owing to hearing loss, but the effect on patient care is often overlooked. Jan Blustein professor of health policy and medicine at New York University, and who has also experienced the affects of hearing loss, joins us to explain what that's like, and gives some...

We know that smoking 20 cigarettes a day increases your risk of CHD and stroke - but what happens if you cut down to 1, do you have 1/20th of that risk? Allan Hackshaw, professor of epidemiology at UCL joins us to discuss a new systematic review and meta analysis published on bmj.com, examining the risk of smoking just one or two cigarettes a...

A study published by The BMJ today reports a possible association between intake of highly processed (“ultra-processed”) food in the diet and cancer. Ultra-processed foods include packaged baked goods and snacks, fizzy drinks, sugary cereals, ready meals and reconstituted meat products - often containing high levels of sugar, fat, and salt, but...

This week, a very special conversation with a maverick British medico who set up a tiny research centre in Oxford and watched it grow into a global collaboration of over 40,000 people across 130 countries. Three decades on, the Cochrane Collaboration now produces the world's most trusted health evidence that's used by patients, health...

The number of people estimated to be latently infected with TB - that is infected with TB, which has not yet manifested symptoms - is around 2 billion. That is 1 in 3 people on the planet are infected by the bacteria. The World Health Organization’s website notes that on average 5-10% of those infected with TB will develop active TB. That number...

Last week we heard about how evidence in policy making is imperilled - but today we’re hearing about a plan to make evidence about health central to all aspects of government. Laura Webber, director of public health modelling at the UK Health Forum, Susie Morrow, chair of the Wandsworth Living Streets Group and Brian Ferguson, chief economist at...

What can we learn from the shameful story of vaginal mesh? That thousands of women have been irreversibly harmed; that implants were approved on the flimsiest of evidence; that surgeons weren’t adequately trained and patients weren’t properly informed; that the dash for mesh, fuelled by its manufacturers, stopped the development of alternatives;...

This week on the podcast, (2.02) a listener asks, when we suggest something to stop, should we suggest an alternative instead? (8.24) Helen tells us to stop putting people on treatment for subclinical hypothyroidism, but what does that mean for people who are already receiving thyroxine? (20.55) Carl has a black box warning about z drugs, and...

At EBM live recently, we ran a workshop with researchers, patients and clinicians to talk about patient rights in research - should patients be setting the full research agenda? Should they be full participants and authors? Helen Macdonald, BMJ’s UK research editor and co-host of our talk evidence podcast sat down to Paul Wicks, researcher and...

Burnout is a problem in healthcare - it’s a problem for individuals, those who experience it and decide to leave a career they formerly loved, but it’s also a problem for our healthcare system. Burnout is associated with an increase in medical errors, and poor quality of care. Fundamentally it’s a patient safety issue. But, unlike other patient...

In the UK, for just over a year, we've been paying the "Soft Drinks Industry Levy" - a tax on sugary beverages intended to reduce our consumption of free sugars. That was based on taxes that had happened in other countries, however, in the UK high sugar snacks, such as confectionery, cakes, and biscuits make a greater contribution to intakes of...

The internecine takes on medical specialty are a common thread in the Christmas BMJ, and this year we're doing it through the lens of driving. Which speciality speeds the most, who has the nicest cars? André Zimerman, soon to be cardiologist, and researcher lets us know - and also why you can't rely on being a doctor to get off a speeding ticket....

For the next few months Talk Evidence is going to focus on the new corona virus pandemic. There is an enormous amount of uncertainty about the disease, what the symptoms are, fatality rate, treatment options, things we shouldn't be doing. We're going to try to get away from the headlines and talk about what we need to know - to hopefully give...

We knew a pandemic was coming at some point - it’s kind of why we have the WHO. We have had various smaller scale tests of the international response to an infectious disease outbreak - Ebola in west africa being the most recent. After that, reports criticised the WHO's response - citing problems around the swiftness of their action, the lack of...

EJ Kurth-Kraczek
Aug 1, 1999; 48:1667-1671
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