Abstract
Cerebral creatine deficiencies (CCD's) are a small group of disorders mainly concerned with creatine biosynthesis and utilization in the brain at the blood-brain interface. The most common CCD is:
- creatine transporter defect (CTD), an X-linked condition caused by mutations in the "SLC6A8" gene.
The two other forms of CCD are creatine "enzymatic" defects (CED's) in creatine biosynthesis, i.e. the enzyme deficiencies:
- , and
- guanidinoacetate methyltransferase deficiency.