Spaceflight affects neuronal morphology and alters transcellular degradation of neuronal debris in adult Caenorhabditis elegans

This research study was funded by several space agencies and organizations, including those from the UK, Europe, Japan, and America. The main goal of this project is to understand how living organisms might be affected when they are in outer space for extended periods-a situation known as "microgravity." To do this, scientists used a special type of worm called C. elegans that naturally produces more mCherry (a fluorescent protein) than usual and also have sensitivity to touch through their skin-like structures. In the study, these space-traveling worms were observed under normal conditions on Earth as well as in a simulated zero-gravity environment created by NASA's Cold Stowage team (a group that specializes in storing and handling biological samples for experiments). The researchers looked at how their touch receptor neurons, which are responsible for feeling the world around them through sensing changes on their skin surface, were affected.

The research paper presents an investigation into the effects of spaceflight on mCherry-induced proteostress in touch receptor neurons, specifically focusing on Pmec-4 animals. The study was supported by various agencies including UK Space Agency, ESA, JAXA, and NASA (BBSRC grant BB/N 015894/1), with additional support from the National Aeronautics and Space Administration through Grant No. NNX15AL16G. The methodology involved examining neuronal morphology in space-flown Pmec-4 mCherry1 animals, which overproduce an mCherry reporter well characterized to elevate the production of exosomes in touch receptor neurons (Pmech-4 mec-4). The study aimed to observe changes in apparent protein aggregation and mechanotransduction signaling. Key findings revealed that spaceflight did not significantly impact overall morphology, as observed through a normal range of 42-66 touch receptor neurons per condition (n=10).