RNA sequencing platform unlocks rare disease diagnoses missed by standard tests

Researchers from Children's Hospital of Philadelphia (CHOP) developed a new RNA sequencing strategy that can reveal how genetic variants disrupt gene function and improve the diagnosis of rare diseases.

In a study published in the journal Science Advances, the study team demonstrate that this platform could reveal disease-causing genetic variants and provide molecular diagnoses for previously undiagnosed patients, including five individuals whose conditions had remained unresolved after standard testing.

Limits of current genetic testing

Exome and genome sequencing are widely used methods for identifying genetic variants responsible for rare diseases. However, these approaches have a diagnostic yield of only 20% to 50%, meaning that more than half of patients with suspected rare diseases are unable to obtain a molecular diagnosis.

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