Model organisms allow for incisive experimental studies of fundamental conserved mechanisms that are shared with humans, leading to knowledge that can be applied to understanding human disease and developing novel therapeutic approaches. Caenorhabditis elegans (C. elegans), a microscopic roundworm, has proven to be one of the most valuable model organisms for these endeavors. The success of this diminutive nematode is due to its unique attributes and the scientific community that grew up around it, supported by shared resource centers. One of these invaluable centers is the University of Minnesota’s Caenorhabditis Genetics Center (CGC), a repository and distribution center for thousands of genetically characterized C. elegans strains generated during the course of the past half-century of C. elegans research.
A new perspective piece published in the Proceedings of the National Academy of Sciences (PNAS) explains why dedicated, sustained funding for shared-resource centers like the CGC are critical to maintaining the pace of biological discovery. Organized by Ann Rougvie, a professor in the College of Biological Sciences at UMN and CGC director, and co-authored with six Nobel Laureates and other resource center directors, the paper highlights major discoveries expedited by these shared resources.
“The fourth Nobel Prize for work in C. elegans was announced in 2024, so we thought it was a good time to celebrate and make the case for how resource centers like the CGC move science forward and accelerate the pace of discovery,” says Rougvie.
The enormous impact of a tiny worm
Unique biological traits make C. elegans a perfect fit for biomedical research. It possesses a specific number of somatic cells (959), providing a constant and easily trackable cellular blueprint that simplifies the study of complex developmental and neurological processes. It’s also transparent, which allows scientists to observe gene expression and cellular events in a living, intact organism. Moreover, it possesses genes that correlate with 40% of known human disease genes, making it an inexpensive and highly effective model for investigating the molecular mechanisms underlying many conditions including neurodegenerative diseases such as Alzheimer’s.
Since being introduced as a model organism in the 1960s, the worm has been central to discoveries recognized by four Nobel Prizes, including work that has led to FDA-approved drugs. The article celebrates these milestones and also emphasizes that the success of C. elegans as a research model would be impossible without ongoing support for the research infrastructure provided by entities such as the CGC.
“The CGC is the hub - the beating heart - of an international community of thousands of scientists using C. elegans as an experimental organism,” says Nobel Laureate Victor Ambros, a professor at the University of Massachusetts Medical School and co-author of the paper. “This well-documented shared resource of genetically defined worm strains not only accelerates discovery by enabling investigators easy access to published strains, but also promotes robust and reproducible results, and stimulates sharing of information among research groups around the world.”
Bringing it all together
The NIH-funded Caenorhabditis Genetics Center has been located at the University of Minnesota since 1992, first under the directorship of Robert K. Herman and under the directorship of Ann Rougvie since 2007. The CGC enhances cost-savings and boosts efficiency and is highly valued by the C. elegans community. For example, by creating a centralized location for housing a wide variety of useful strains available to researchers (now exceeding 27,000 curated strains), the CGC reduces the burden on individual labs for developing and distributing strains to others, time-consuming tasks that would slow down the research process. It also means that the same strain can be used by multiple research teams, allowing for greater standardization and reproducibility.
By interweaving vignettes of Nobel Prize winning research with essays touting resource centers, the authors celebrate the profound value of community-shared resources as essential drivers of fundamental science. They note that “each breakthrough opens unexpected new directions” and look forward to future "insights that will again transform our understanding of biology and our ability to treat disease." Implicitly, this article makes a compelling case that sustained support for these specialized shared resources is necessary to maintain the pace of fundamental biological discovery. — Stephanie Xenos