Subscribe free to our newsletters via your
. 24/7 Space News .

Space fish detail effects of microgravity on bones
by Brooks Hays
Tokyo (UPI) Sep 23, 2015

disclaimer: image is for illustration purposes only

Medaka fish raised on the International Space Station developed lighter, weaker bones, researchers in Japan report.

Previous studies have found the bones of astronauts become less dense after spending extended periods of time in microgravity, but researchers haven't been able to determine why.

The new study, published in the journal Scientific Reports, offers insights as to how bones react to life in space.

According to researchers at the Tokyo Institute of Technology, time spent in microgravity encouraged osteoclast activity. Osteoclasts are the bone cells responsible for bone resorption. Osteoclasts dismantle bone tissue, while osteoblasts form bone tissue.

Together, these cells play a vital role in the maintenance, repair, remodeling, and overall amount of bone tissue.

Researchers were also able to identify a series of unregulated genes responsible for boosting osteoclast activity.

The research was made possible by genetic engineering. The Mendaka specimens were modified so that their osteoclasts and osteoblasts produced two different types of fluorescence when activated, allowing researchers to monitor the fishes' bones in real time.

Of the 312 modified fish, only the healthiest 24 juvenile specimens were sent to space. The rest stayed behind to serve as a control group.

Weightlessness has a variety of effects on human health. In addition to resulting in bone and muscle loss, time spent in microgravity has also been shown to affect an astronaut's vision, blood pressure, ability to heal and much more.

In preparation for future deep-space missions, NASA scientists are working with researchers around the world to better understand the physiological consequences of lengthy periods of time spent in space.

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.
SpaceDaily Contributor
$5 Billed Once

credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly

paypal only


Related Links
Station at NASA
Station and More at Roscosmos
S.P. Korolev RSC Energia
Watch NASA TV via Space.TV
Space Station News at Space-Travel.Com

Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks DiggDigg RedditReddit GoogleGoogle

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

US astronaut misses fresh air halfway through year-long mission
Washington (AFP) Sept 14, 2015
Halfway into a year in space - the longest ever attempted at the International Space Station - American astronaut Scott Kelly said Monday he misses fresh air but is adapting well. Kelly and Russian cosmonaut Mikhail Kornienko agreed to double the length of a typical astronaut's mission at the ISS in order to help the world's space agencies study how long-term space travel affects the human ... read more

China to rehearse new carrier rocket for lunar mission

NASA's LRO discovers Earth's pull is 'massaging' our moon

Moon's crust as fractured as can be

China aims to land Chang'e-4 probe on far side of moon

Expect Martian Colonies to Build Themselves First

Opportunity Continues Search for Clay Minerals On Mars

ExoMars 2016 targets March launch window

Record-breaking astronauts return to Earth

Space Architecture: From Outer Space to the Ocean Floor

Making a difference with open source science equipment

NASA, Harmonic Launch First Non-Commercial UHD Channel in NAmerica

Russian cosmonaut back after record 879 days in space

Long March-2D carrier rocket blasts off in NW China

Progress for Tiangong 2

China rocket parts hit villager's home: police, media

China's "sky eyes" help protect world heritage Angkor Wat

US astronaut misses fresh air halfway through year-long mission

Andreas Mogensen lands after a busy mission on Space Station

ISS Crew Enjoy Kharcho Soup, Mare's Milk in Orbit

Slam dunk for Andreas in space controlling rover on ground

Ariane 5 ready to orbit Sky Muster and ARSAT-2 on September 30

Boeing rejects Aerojet bid for United Launch Alliance

Europe's MBDA to market U.S.-made rocket conversion system

Russia Launches Telecoms Satellite on Board Proton-M Rocket

Study: 'Hot Jupiter' exoplanets formed extremely rapidly

Stellar atmosphere can be used to predict the composition of rocky exoplanets

Watching an exoplanet in motion around a distant star

Europlanet 2020 launches new era of planetary collaboration in Europe

Permanent data storage with light

Big Iron gets technology boost

NASA Seeks Big Ideas from Students for Inflatable Heat Shield Technology

Platinum and iron oxide working together get the job done

The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.