COMMON GENETICS AND METABOLIC DISEASES IN SAUDI ARABIA
TABLE III - Therapeutic Modalities11,12
Disease
Alerting sign
Glycogen storage disease type I
Nocturnal feeding of slowly digested glucose polymer; avoidance of fructose in severe cases
Fructose -1,6-diphosphatase deficiency
Avoidance of fructose or sucrose containing food, antibiotic or antipyretic solutions
Glycogen storage disease type 3
Similar to type 1, experimental use of alanine to prevent the appearance of cardiomyopathy
Galactosemia
Galactose free milk
Maple syrup urine disease
Branched chain restricted milk formulas
Classic PKU
Phenylalanine restricted formulas and food
Homocystinuria
Low protein or methionine restricted diet, betaine, folic acid, aspirin and in responsive variants, pyridoxine
6-PTS deficient PKU
Tetrahydrobiopterin, neurotransmitter precursors as DOPA and 5-hydroxytrtyptophan with carbi-DOPA
Non-ketotic hyperglycinaemia High doses of dextrometorphan and sodium benzoate

Methylmalonic acidaemia
Insoleucine, and valine restricted diet, and intranasal or IM injections of hydroxycobalamin, alkalinizing citrate solutions, L-carnitine
Propionic acidaemia

Isoleucine and valine restricted diet; avoidance of fasting, L-carnitine, alkalinizing solutions of citrate
Biotinidase deficiency Biotin
Fatty acid oxidation defects Frequent high carbohydrate feedings, L-carnitine