Red wine's resveratrol could help Mars explorers stay strong

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Mars is about 9 months from Earth with today's tech, NASA reckons. As the new space race hurtles forward, Harvard researchers are asking: how do we make sure the winners can still stand when they reach the finish line?

Published in Frontiers in Physiology, their study shows that substantially preserves and strength in rats exposed to the wasting effects of simulated Mars gravity.

Space supplements

Out in space, unchallenged by gravity, muscles and bones weaken. Weight-bearing muscles are hit first and worst, like the soleus in the calf.

"After just 3 weeks in space, the human soleus muscle shrinks by a third," says Dr. Marie Mortreux, lead author of the NASA-funded study at the laboratory of Dr. Seward Rutkove, Beth Israel Deaconess Medical Center, Harvard Medical School. "This is accompanied by a loss of slow-twitch muscle fibers, which are needed for endurance."

To allow astronauts to operate safely on long missions to Mars—whose gravitational pull is just 40% of Earth's—mitigating strategies will be needed to prevent muscle deconditioning.

"Dietary strategies could be key," says Dr. Mortreux, "especially since astronauts travelling to Mars won't have access to the type of exercise machines deployed on the ISS."

A strong candidate is resveratrol: a compound commonly found in grape skin and blueberries that has been widely investigated for its , anti-oxidative, and anti-diabetic effects.

"Resveratrol has been shown to preserve bone and muscle mass in rats during complete unloading, analogous to microgravity during spaceflight. So, we hypothesized that a moderate daily dose would help mitigate muscle deconditioning in a Mars gravity analogue, too."

Mars rats

To mimic Mars gravity, the researchers used an approach first developed in mice by Mary Bouxsein, Ph.D., also at Beth Israel Deaconess, in which rats were fitted with a full-body harness and suspended by a chain from their cage ceiling.

Thus, 24 male rats were exposed to normal loading (Earth) or 40% loading (Mars) for 14 days. In each group, half received resveratrol (150 mg/kg/day) in water; the others got just the water. Otherwise, they fed freely from the same chow.

Calf circumference and front and rear paw grip force were measured weekly, and at 14 days the calf muscles were analyzed.

Resveratrol to the rescue

The results were impressive.

As expected, the 'Mars' condition weakened the rats' grip and shrank their calf circumference, muscle weight and slow-twitch fiber content.

But incredibly, resveratrol supplementation almost entirely rescued front and rear paw grip in the Mars rats, to the level of the non-supplemented Earth rats.

What's more, resveratrol completely protected muscle mass (soleus and gastrocnemius) in the Mars rats, and in particular reduced the loss of slow-twitch muscle fibers. The protection was not complete, though: the supplement did not entirely rescue average soleus and gastrocnemius fibers cross-sectional area, or calf circumference.

As reported previously, resveratrol did not affect or total body weight.

Perfecting the dose

Previous resveratrol research can explain these findings, says Dr. Mortreux.

"A likely factor here is .

"Resveratrol treatment promotes muscle growth in diabetic or unloaded animals, by increasing insulin sensitivity and glucose uptake in the muscle fibers. This is relevant for astronauts, who are known to develop reduced insulin sensitivity during spaceflight."

The anti-inflammatory effects of resveratrol could also help to conserve muscle and bone, and other anti-oxidant sources such as dried plums are being used to test this, adds Dr. Mortreux.

"Further studies are needed to explore the mechanisms involved, as well as the effects of different doses of resveratrol (up to 700 mg/kg/day) in both males and females. In addition, it will be important to confirm the lack of any potentially harmful interactions of resveratrol with other drugs administered to astronauts during space missions."


Explore further

Another reason for wine lovers to toast resveratrol

More information: Marie Mortreux et al, A Moderate Daily Dose of Resveratrol Mitigates Muscle Deconditioning in a Martian Gravity Analog, Frontiers in Physiology (2019). DOI: 10.3389/fphys.2019.00899
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Citation: Red wine's resveratrol could help Mars explorers stay strong (2019, July 18) retrieved 24 August 2019 from https://phys.org/news/2019-07-red-wine-resveratrol-mars-explorers.html
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User comments

Jul 18, 2019
I suppose they investigate their muscles by killing them. Wouldn't it be possible to use tomography? A small rat tomograph could be useful in many ways in rat experiments. Maybe even an echograph could be useful.

Jul 18, 2019
their study shows that resveratrol substantially preserves muscle mass and strength in rats exposed to the wasting effects of simulated Mars gravity.
Sorry! I don't believe it! This is nonsense!
There is a vast and an endless stream of made-up and fake and/or erroneous research and bogus health claims, mainly from the ad people trying to push their food product to con you out of money with no regard to your good health, made about the 'magical' properties of resveratrol and I bet this is just another one out of the vast number of those claims based on fake and/or erroneous research.

https://thedoctor...eratrol/

So, sorry! Red wine won't help any people stupid and/or ignorant enough to go to Mars escape the dire bad health effect from low gravity there! Try again, you loons.


Jul 18, 2019
their study shows that resveratrol substantially preserves muscle mass and strength in rats exposed to the wasting effects of simulated Mars gravity.
One way their study is almost certainly extremely flawed is that they probably didn't give the resveratrol orally and that means their experiments fail to simulate natural conditions because nearly all resveratrol orally consumed would fail to reach the wider bloodstream where it can then enter the muscles and bone;

"The body absorbs only about 25% of the resveratrol dose, and even less—about 1%—escapes the liver to enter the bloodstream, "

Please don't be conned into thinking resveratrol has magical health benefits!


Jul 20, 2019
I took a daily 500 mg resveratrol supplement, and it caused depression. Other people have had the same experience

Jul 20, 2019
their study shows that resveratrol substantially preserves muscle mass and strength in rats
Like embalming fluid? It's the side effects from the fukitol compounds that always do me in...

Jul 20, 2019
This is exaggerated.

Jul 21, 2019
their study shows that resveratrol substantially preserves muscle mass and strength in rats...

And so, at their Mars mission research centre, the rats rejoiced.

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