COMMON GENETICS AND METABOLIC DISEASES IN SAUDI ARABIA
TABLE III - Therapeutic Modalities11,12
Disease
Alerting sign
HMG CoA lyase deficiency
Leucine restricted, low fat high carbohydrate diet, alkalinizing solutions (citrate; bicarbonate), L-carnitine
Pyruvate carboxylase deficiency
Biotin should be tried in all patients since some will respond favourably
Glutaric aciduria type I
Riboflavin, L-carbitine, baclophene, lysine restricted diet
Isovaleric academia Leucine restricted or low protein diet, L-carnitine, and alkalinizing solutions

PRACTICAL POINTS
1.

The Middle Eastern culture is heavily consanguineous. Inherited genetic disorders are quite common; especially inherited metabolic disorders
2.
The practicing physician must be aware of these disorders, especially those which present in the neonatal period or the first year of life.
3.
The awareness of these disorders is important to facilitate early diagnosis and initiation of treatment especially in cases of organic acidurias and aminoacidemias, to prevent neurologic crippling, and in lysosomal storage disorders to initiate bone marrow transplantation or enzyme treatment, which is preferably done in the first year of life, to prevent the progression of the disease.
4. As treatment is either difficult and expensive or unavailable. Prevention of these disorders by premarital genetics screening (eg. Sickle cell anaemia and thalassaemia). Neonatal screening eg. Organic acidemias, aminoacidemias and pre-implantation genetics diagnosis11, if the exact molecular defect is known in any of these disorders and last but not least prenatal diagnosis and abortion, if this can be done before 120 days of conception (134 days from last menstrual period) if the disorder is incompatible with life, according to the recommendations of our Islamic leaders.