Medical Genetics - V. M. Zaporozhan 2005

Multifactorial Diseases
Genetics of Some Common Multifactorial Diseases
Epilepsy

Most forms of epilepsy are characterized by a polygenic hereditary predisposition, with the onset of the disease resulting from the interaction between genetic and environmental factors. Research has established the crucial role of ion channel genes (potassium, sodium, calcium, and chloride), which are involved in neuronal membrane polarization mechanisms, as well as neurotransmitter receptor genes in The Development of epilepsy. Mutations in the potassium channel genes KCNQ2 (20q13.3) and KCNQ3 (8q24) lead to benign familial neonatal convulsions, with a subsequent 16% risk of developing generalized epilepsy. Mutations in the sodium channel genes SCN1A (2q24) and SCN1B (19q13) are associated with the development of generalized epilepsy with febrile seizures. Identifying the genetic defect is clinically important because the MECHANISM OF ACTION of many anticonvulsants is based on the modulation of ion channel function. For instance, the anticonvulsant effect of carbamazepine and phenytoin is related to the potentiation of sodium channel inactivation.



Last update: 11/08/2026

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