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News
A kidney-less roundworm is helping scientists decode a mutation linked to polycystic kidney disease. Rutgers researchers used CRISPR to introduce the human-equivalent mutation into C. elegans and found the altered protein couldn't reach its functional destination in cells. Crucially, the defective protein didn't sabotage its healthy counterpart — one working gene copy was enough to maintain normal function.
Rutgers University researchers have turned to C. elegans — a tiny roundworm with no kidneys — to better understand a genetic mutation linked to autosomal dominant polycystic kidney disease (ADPKD), an inherited condition where fluid-filled cysts grow in the kidneys and can eventually lead to kidney failure. Using CRISPR gene-editing, the team introduced the worm equivalent of a human mutation classified as "likely disease-causing" and tracked what happened to the proteins it produces.
The results were striking: the altered protein failed to reach the cilia (antenna-like cell structures) where it normally functions, dropping to just 15% of normal levels in the nerve cell body and becoming undetectable at its action site. Its partner protein was similarly disrupted. However, when both a healthy and mutated copy of the gene were present, the healthy protein functioned normally — the defective version didn't interfere.
Why it matters: As genetic testing becomes more widespread, clinicians increasingly encounter DNA variants of uncertain significance. This worm model offers a faster, more efficient way to determine whether a mutation is truly harmful — and how — potentially helping doctors make more accurate diagnoses and guiding future therapeutic strategies for kidney disease.
