Phosphoserine aminotransferase deficiency, infantile/juvenile form

Phosphoserine aminotransferase (PSAT) deficiency, infantile/juvenile form, is an extremely rare inherited metabolic disorder that affects the body's ability to make the amino acid L-serine. L-serine is essential for many important processes in the body, including brain development, nerve function, and the production of other important molecules. The disease is caused by mutations in the PSAT1 gene, which provides instructions for making an enzyme needed in one of the key steps of serine production. In the infantile and juvenile forms, children may present with seizures, intellectual disability, and delayed development that become apparent in infancy or childhood. Some children also experience a smaller-than-expected head size (microcephaly) and problems with movement and coordination. The severity of symptoms can vary, but neurological problems are typically the most prominent feature. Treatment involves supplementation with L-serine, and sometimes glycine, to restore the amino acids the body cannot produce on its own. When started early, treatment may help improve seizure control and support better developmental outcomes, though the degree of improvement depends on how early treatment begins and the severity of the condition. Because this disease is so rare, awareness among healthcare providers is limited, which can lead to delays in diagnosis.

Bring these to your next appointment

• Q1.What is the recommended dose of L-serine for my child, and how often should it be given?,Should my child also take glycine supplements?,How often should amino acid levels in the blood or spinal fluid be checked?,What seizure medications work best alongside L-serine supplementation?,What developmental therapies do you recommend, and how often?,Are there any clinical trials or new treatments being studied for this condition?,Should other family members be tested for carrier status?

Common questions about Phosphoserine aminotransferase deficiency, infantile/juvenile form