Posted on 01/05/2021 8:55:24 AM PST by Red Badger
PET scans showing someone with brown fat (l) and no brown fat. (Andreas G. Wibmer/Heiko Schöder/MSKCC)
==============================================================
A large new study has provided strong evidence that people with brown fat in their bodies are less likely to suffer from a range of health conditions.
"For the first time, it reveals a link to lower risk of certain conditions," says one of the researchers, Rockefeller University Hospital physician Paul Cohen.
"These findings make us more confident about the potential of targeting brown fat for therapeutic benefit."
Brown fat or brown adipose tissue (BAT) is particularly common in hibernating mammals and newborns. BAT helps mammals regulate temperature - when we're really cold, the large amounts of mitochondria found in this type of fat tissue burn energy and produce heat. In fact, the iron-rich mitochondria are what gives brown fat its characteristic colour.
It wasn't until 2009 that scientists discovered some adult humans have brown fat in their bodies as well, usually around the neck and shoulders.
There have been plenty of mouse studies looking at the benefit of having brown fat, but in humans the research has been murkier until recently. Having brown fat seems to improve a person's metabolism and may even help to lose weight (although the latter is probably not quite as simple).
"The natural question that everybody has is, 'What can I do to get more brown fat?'" Cohen says.
"We don't have a good answer to that yet, but it will be an exciting space for scientists to explore in the upcoming years."
Looking at a large dataset of 52,487 participants undergoing PET/CT scans for cancer evaluation, the team found evidence of brown fat in just under 10 percent of cases (5,070 people).
The researchers think this might be an underestimation because of the conditions the participants were under - they were told to avoid cold exposure, exercise, and caffeine before the scans, all of which have been linked to brown fat activity.
Around 4.6 percent of those with brown fat also had type 2 diabetes, while that number was 9.5 percent in the 'no brown fat' group. A similar result was seen in abnormal cholesterol results – 18.9 percent of people with brown fat had abnormal cholesterol, compared to 22.2 percent of people who didn't have brown fat.
Hypertension, congestive heart failure, and coronary artery disease also saw small positive differences in the brown fat vs no brown fat groups.
"These findings were supported by improved blood glucose, triglyceride and high-density lipoprotein values," the team writes in their new paper.
While the numbers here are exciting, there's no evidence as yet that brown fat makes you immune to any of these conditions - but there's a link to reduced risk worth exploring further.
What was really interesting though is that brown fat was particularly protective in those that were obese. Those obese patients that had brown fat had similar prevalence of these metabolic and heart conditions as non-obese people.
"It almost seems like they are protected from the harmful effects of white fat," says Cohen.
"Taken together, our findings highlight a potential role for BAT in promoting cardiometabolic health," the researchers note in their paper.
It's important to note that the data the researchers were working with came from cancer evaluations at the Memorial Sloan Kettering Cancer Center, meaning this is not a sample representative of the general population.
Nevertheless, the study has yielded a fascinating new look at the role of brown fat in the human body, and will hopefully lead to even more discoveries in the future.
"We are considering the possibility that brown fat tissue does more than consume glucose and burn calories, and perhaps actually participates in hormonal signaling to other organs," says Cohen.
The research has been published in Nature Medicine.
https://www.nature.com/articles/s41591-020-1126-7
The browning of America.
Not much explanation of what brown fat is.
“Free at last, Free at last, Thank God almighty I am free at last.” -- Stacy Abrams
Pretty sure I gained a lot more brown fat during Covid lol.
That must be why nearly 50%+ of the US and 40%+ of the world is overweight. Got it.
Rerun had skills.
I’ll have to watch “Hey Mickey” now...
Racists!
Your image didn’t show.
hmmm, shows for me. Are you behind a firewall that may be blocking?
No firewall. I’ve had the same thing, though. Sometimes a site can tell the difference if you went to the actual site, vs embedding a link. Since you went to the site, it will show for you (or in your cache). Maybe just post the image link?
Sure,
But its kind of like having to explain a joke when the listener doesnt get it....lol
I have read in the past that brown fat is formed during childhood. Children who are active and not overweight will develop brown fat which lasts into one’s older years even if one becomes obese later.
There is likely a correlation to overfed, underactive children not developing brown fat which causes all the fat cells to be white, useless, disease-causing fat.
Drink lots of dark beer.......
It may not give you brown fat but you won’t care......
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.