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Early progression of Krabbe disease in patients with symptom onset between 0 and 5 months

February 18, 2019 Ruth O'Keefe

Maria L. Beltran-Quintero, Nicholas A. Bascou, Michele D. Poe, David A. Wenger, Carlos A. Saavedra-Matiz, Matthew J. Nichols and Maria L. Escolar

Orphanet Journal of Rare Diseases 2019 14:46

Click here to view publication

Background

Krabbe disease is a rare neurological disorder caused by a deficiency in the lysosomal enzyme, β-galactocerebrosidase, resulting in demyelination of the central and peripheral nervous systems. If left without treatment, Krabbe disease results in progressive neurodegeneration with reduced quality of life and early death. The purpose of this prospective study was to describe the natural progression of early onset Krabbe disease in a large cohort of patients.

Methods

Patients with early onset Krabbe disease were prospectively evaluated between 1999 and 2018. Data sources included diagnostic testing, parent questionnaires, standardized multidisciplinary neurodevelopmental assessments, and neuroradiological and neurophysiological tests.

Results

We evaluated 88 children with onset between 0 and 5 months. Median age of symptom onset was 4 months; median time to diagnosis after onset was 3 months. The most common initial symptoms were irritability, feeding difficulties, appendicular spasticity, and developmental delay. Other prevalent symptoms included axial hypotonia, abnormal deep tendon reflexes, constipation, abnormal pupillary response, scoliosis, loss of head control, and dysautonomia. Results of nerve conduction studies showed that 100% of patients developed peripheral neuropathy by 6 months of age. Median galactocerebrosidase enzyme activity was 0.05 nmol/h/mg protein. The median survival was 2 years.

Conclusions

This is the largest prospective natural history study of Krabbe disease. It provides a comprehensive description of the disease during the first 2 years of life. With recent inclusion of state mandated newborn screening programs and promising therapeutic interventions, enhancing our understanding of disease progression in early onset Krabbe disease will be critical for developing treatments, designing clinical trials, and evaluating outcomes.

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Pennsylvania (Opt-In)

Currently Krabbe disease is not automatically screened for in the state of Pennsylvania. Parents must request or “Opt-In” to have Krabbe added to the newborn screening tests done at birth.

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