Question: How many people are affected by PMM2-congenital disorder of glycosylation ?
Answer: More than 800 individuals with PMM2-CDG have been identified worldwide.
Source: GHR

Question: What are the genetic changes related to PMM2-congenital disorder of glycosylation ?
Answer: PMM2-CDG is caused by mutations in the PMM2 gene. This gene provides instructions for making an enzyme called phosphomannomutase 2 (PMM2). The PMM2 enzyme is involved in a process called glycosylation, which attaches groups of sugar molecules (oligosaccharides) to proteins. Glycosylation modifies proteins so they can perform a wider variety of functions. Mutations in the PMM2 gene lead to the production of an abnormal PMM2 enzyme with reduced activity. Without a properly functioning PMM2 enzyme, glycosylation cannot proceed normally. As a result, incorrect oligosaccharides are produced and attached to proteins. The wide variety of signs and symptoms in PMM2-CDG are likely due to the production of abnormally glycosylated proteins in many organs and tissues.
Source: GHR

Question: Is PMM2-congenital disorder of glycosylation inherited ?
Answer: This condition is inherited in an autosomal recessive pattern, which means both copies of the gene in each cell have mutations. The parents of an individual with an autosomal recessive condition each carry one copy of the mutated gene, but they typically do not show signs and symptoms of the condition.
Source: GHR

Question: What are the treatments for PMM2-congenital disorder of glycosylation ?
Answer: These resources address the diagnosis or management of PMM2-CDG: - Gene Review: Gene Review: PMM2-CDG (CDG-Ia) - Genetic Testing Registry: Carbohydrate-deficient glycoprotein syndrome type I These resources from MedlinePlus offer information about the diagnosis and management of various health conditions: - Diagnostic Tests - Drug Therapy - Surgery and Rehabilitation - Genetic Counseling - Palliative Care
Source: GHR