Bioengineers at the University of California San Diego have created the first genome-scale reference map detailing how individual genes influence the behavior and identity of human induced pluripotent stem cells (iPSCs). Published in Nature Biotechnology, the study utilized CRISPR technology to systematically switch off 11,692 genes, providing a reference atlas for researchers to predict how genetic changes impact cellular transcriptomes.
Mapping Gene Function with CRISPR
Understanding the human genome remains a significant hurdle in modern medicine, as the function of most human genes within stem cells is not yet fully understood. To address this, the UC San Diego team developed a comprehensive resource that acts as a “hypothesis engine.” By employing CRISPR to switch off genes one by one, researchers observed the resulting effects across more than 2.5 million single cells.
According to Prashant Mali, the study’s senior author and a professor in the Shu Chien-Gene Lay Department of Bioengineering at the UC San Diego Jacobs School of Engineering, this map allows scientists to look up the consequences of perturbing almost any gene. Instead of conducting time-consuming experimental screenings, researchers can use this open-access data to identify which genes might serve as targets for driving stem cells into specific states, such as heart or muscle tissue.
Did you know? Induced pluripotent stem cells (iPSCs) are adult cells that have been reprogrammed to an embryonic-like state.
Accelerating Disease Modeling and Patient-Specific Treatments
The implications for clinical medicine are extensive. By providing a baseline of how genes regulate cell identity, this reference map supports the development of virtual cell models for complex diseases.
Mali noted that these genome-scale screens are critical for the future of computational biology. They provide the necessary data to power AI tools aimed at genotype-phenotype prediction—a primary goal in current genetics research.
Streamlining Biomedical Discovery
For researchers, the primary benefit is the reduction in experimental overhead. Yesh Doctor, a bioengineering PhD student and co-first author, described the map as a starting point for scientific inquiry. By consulting this atlas, teams can bypass the initial, labor-intensive phases of gene screening and move directly to hypothesis testing. This efficiency is expected to accelerate the timeline for bringing new diagnostic and therapeutic strategies from the lab to the clinic.
Frequently Asked Questions
What are induced pluripotent stem cells?
iPSCs are adult cells—such as skin or blood cells—that have been genetically reprogrammed to behave like embryonic stem cells.
How does CRISPR help map gene function?
CRISPR acts as a tool to “switch off” specific genes within a cell. By observing how the cell changes after a gene is disabled, researchers can deduce the original function of that gene.
Is this research available to the public?
Yes, the team at UC San Diego has made this a genome-scale, open-access resource, intended to assist the global biomedical research community in building better disease models.
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