Going into space might wreak havoc on our bodies, but a new set of microgravity experiments may help shed light on new approaches for treating cartilage diseases on Earth. Scientists suggest that our cartilage tissue that serves as a cushion between bones might be able to survive microgravity relatively unscathed. The study was published in The FASEB Journal. 

Specifically, when in a microgravity environment, chondrocytes (a main component of cartilage) were more stable and showed only moderate alterations in shape and structure when compared to their Earthbound counterparts.

This was particularly the case for those also exposed to growth factors and specific nutrients. For those of us on the ground, the success of the growth factors and nutrients suggests that it might be possible to halt cartilage degradation or even reverse it with improved nutrition and/or new drugs.

Research under microgravity helps us in many ways to understand the complex processes of life and as an excellent example of the gravity-dependent mechanisms that underlie cartilage diseases.

They hope to find new strategies to prevent and to treat cartilage damages not only in astronauts but also in patients on Earth.

Human Chondrocytes

To make this discovery, they used three different groups of human chondrocytes for the flight experiment. The first group of chondrocytes was cultured and fixed to preserve the cells in their current state, without further alterations of morphology and metabolism, in the laboratory on the ground.

The second and the third groups were cultured on the ground and taken on board an aircraft, which flew a total of 31 parabolas. During each of the parabolas, the cells were exposed to a period of weightlessness.

While the second group was fixed during the parabolic flight after the first parabola, the third group was fixed after the last parabola. After the flight, the samples from all three groups were collected on the ground in the laboratory and used for analyses.

Weightlessness In Space

As our nation grows both in age and weight, the need to address cartilage breakdown will increase as well. This important study suggests a mechanism used by the body to maintain cartilage integrity in the face of microgravitational stress.