Specifically, the group studied the microscopic worm Caenorhabditis elegans (C. elegans).
The results of their research were published on Thursday, July 5 2012, in the online journal Scientific Reports.
The paper is entitled "Genes down-regulated in spaceflight are involved in the control of longevity in Caenorhabditis elegans" (Scientific Reports 2, Article number: 487doi:10.1038/srep00487).
Their paper stated, "We observed that, in Caenorhabditis elegans, spaceflight suppressed the formation of transgenically expressed polyglutamine aggregates, which normally accumulate with increasing age. Moreover, the inactivation of each of seven genes that were down-regulated in space extended lifespan on the ground."
Dr. Nathaniel J. Szewczyk, from The University of Nottingham in England, was one member of the ICE-FIRST project that involved several researchers from Japan, France, the United States, and Canada.
Page two concludes with quotes from Dr. Szewczyk on their study of space worms.