Abstract：
:Sodium channel alpha subunit type 1 (SCN1A) is voltage gated ion channel which plays critical role in membrane excitability. A common SCN1A IVS5-91G>A (rs3812718) allele has been attributed to be a possible modifying factor for epilepsy susceptibility and therapeutic response. In the present study, we enrolled 485 epilepsy patients and 298 age-sex matched controls free of neurological deficits. Therapeutic response of carbamazepine/oxcarbamazepine (CBZ/OXC) and other antiepileptic drugs were observed in terms of drug responsiveness and drug resistance. Genotyping of SCN1A IVS5-91G>A is done by Taqman custom designed assay; in a real time7500HT System. We observe highly significant association [(P-values for GA (P = 6.58 × 10(-5), OR = 2.13, 95% CI = 1.47-3.09) and AA (P = 4.11 × 10(-9), OR = 3.59, 95% CI = 2.35-5.50)] at variant genotypes as well as A allele (P = 6.92 × 10(-11)), OR = 1.99, 95%, CI = 1.62-2.45) in epilepsy patients versus control subjects. The relative risk for epilepsy susceptibility due to variant containing genotypes (GA + AA) was also significant (P = 1.64 × 10(-5); OR = 2.56; 95% CI = 1.80-3.65) when compared with homozygous wild-type GG. The risk in recessive model (P = 1.34 × 10(-5); OR = 2.12; 95% CI = 1.51-2.97) was also apparent when compared with GA + GG. In case-only analysis, we evaluated the effect of SCN1A IVS5-91G>A polymorphism with drug resistance of anti-epileptic drug therapies. However, we did not observe significant associations either with patients showing drug resistance to CBZ/OXC monotherapy or polytherapy. In conclusion, we report that SCN1AIVS5-91G>A polymorphism is associated with epilepsy susceptibility but not with drug responsiveness in epilepsy patients from North India.
journal_name
Biochimiejournal_title
Biochimieauthors
Kumari R,Lakhan R,Kumar S,Garg RK,Misra UK,Kalita J,Mittal Bdoi
10.1016/j.biochi.2013.02.006subject
Has Abstractpub_date
2013-06-01 00:00:00pages
1350-3issue
6eissn
0300-9084issn
1638-6183pii
S0300-9084(13)00047-3journal_volume
95pub_type
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