Researchers at Rady Children’s Hospital in San Diego are finding that rapidly sequencing the whole genomes of such babies may be key to diagnosing their conditions quicker and improving their health outcomes. Shimul Chowdhury, director of the clinical laboratory at the Rady Children’s Institute for Genomic Medicine, presented data today (October 19) on six case studies of NICU infants at the annual meeting of the American Society of Human Genetics in Orlando.
Chowdhury and his colleagues found that for all six infants, who suffered from a variety of often exceedingly rare genetic disorders, sequencing their whole genomes led to a reduction in the length of stay in the NICU by 124 days compared to control cases and reports from the scientific literature, in which standard array or panel-based genetic testing may be used. This is likely due to the babies getting more-accurate diagnoses—and therefore more appropriate prognoses and treatment plans—sooner.
“Newborns often don’t fit traditional methods of diagnosis, as they may present with non-specific symptoms or display different signs from older children,” Chowdhury says in a statement.
In addition, the researchers calculated that rapid whole genome sequencing (rWGS) reduced the costs associated with the babies’ treatment by about $1.8 million. “The cost savings were especially striking, given that sequencing costs are still high—even with those costs, we found that rapid WGS was not just clinically useful but economically prudent,” Chowdhury added. “Given these benefits, we’d eventually like to see rapid WGS as a reimbursable first-tier test for a proportion of infants in the NICU.”
Chowdhury tells The Scientist that his group at Rady Children’s, which has performed rWGS on about 150 infants, is “in talks with multiple children’s hospitals” around the U.S. in the hopes that many more children in NICUs will have their whole genomes sequenced in the near future.