Patients that have a TPP1 enzyme deficiency and/or confirmed molecular diagnosis of pathogenic variants in the TPP1 gene are eligible to participate if they are untreated or not receiving cerliponase alfa.

Patients that have a TPP1 enzyme deficiency and/or confirmed molecular diagnosis of pathogenic variants in the TPP1 gene are eligible to participate if they are receiving cerliponase alfa.

Batten Disease

CLN2

Neuronal Ceroid-Lipofuscinoses

CLN2 Treatment

Nationwide Children's Hospital

Examining Developmental Outcomes of Children Diagnosed With CLN2 Disease

Changes in the Visual Reception subscale on the Mullen Scales of Early Learning will be assessed every 6 months. Visual reception skills are a measure of visual processing and problem solving. Raw scores will be used as a measure of visual receptions skills with scores ranging from 0 to 50. Higher scores indicate more visual reception skills.

Changes in the Fine Motor subscale on the Mullen Scales of Early Learning will be assessed every 6 months. Fine motor skills are a measure of fine motor coordination. Raw scores will be used as a measure of fine motor skills with scores ranging from 0 to 49. Higher scores indicate more fine motor skills.

Changes in the Receptive Language subscale on the Mullen Scales of Early Learning will be assessed every 6 months. Receptive language skills are a measure of the understanding of language. Raw scores will be used as a measure of receptive language skills with scores ranging from 0 to 48. Higher scores indicate more receptive language skills.

Changes in the Expressive Language subscale on the Mullen Scales of Early Learning will be assessed every 6 months. Expressive language skills are a measure of how an individual communicates. Raw scores will be used as a measure of expressive language skills with scores ranging from 0 to 50. Higher scores indicate more expressive language skills.

Change in motor and language subscales of the CLN2 disease rating scale. Ranges for scores are 0 to 6 with higher scores indicating more abilities in motor and language skill development.

Changes in the Receptive Language subscale on the Preschool Language Scales will be assessed every 6 months. Receptive language skills are a measure of the understanding of language. Raw scores will be used as a measure of receptive language skills with scores ranging from 0 to 65. Higher scores indicate more receptive language skills.

Changes in the Expressive Language subscale on the Preschool Language Scales will be assessed every 6 months. Expressive language skills are a measure of how an individual communicates. Raw scores will be used as a measure of expressive language skills with scores ranging from 0 to 67. Higher scores indicate more expressive language skills.

Jessica Scherr

Principal Investigator

BioMarin Pharmaceutical

Prior to inclusion in the study a senior neurologist will interview the patient and will verify that he fully understands the objectives of the study and he is mentally qualified to sign the informed consent form (severely demented patients who will not be able to adequately consider the participation in the study will be excluded).
Cognitive performance will be evaluated using the Mini-mental Status Examination and Frontal Assessment Battery scales.
No clinical data other than the cognitive assessment and those needed for the clinical work up will be especially collected for this study.
We plan to collect CSF samples for thrombin activity assay.

neurodegenerative diseases/protease

Examining Developmental Outcomes of Children Diagnosed With CLN2 Disease

The Role of the Coagulation Pathway at the Synapse in Prion Diseases

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