|(C;C)||~10% more likely to respond to citalopram|
|(T;T)||2||~10% less likely to respond to citalopram|
From the abstract of this article:
"The effect size of (this) GRIK4 marker alone was modest, but homozygote carriers of the treatment-response-associated marker alleles of both the GRIK4 and HTR2A (see rs7997012) genes were 23% less likely to experience nonresponse to (citalopram) treatment relative to participants who did not carry any of these marker alleles."
- See also Anxiety Blog posting
[PMID 19924111] Polymorphisms in GRIK4, HTR2A, and FKBP5 Show Interactive Effects in Predicting Remission to Antidepressant Treatment
[PMID 21172166] Pharmacogenetics of antidepressant response.
[PMID 21208417] International Study to Predict Optimized Treatment for Depression (iSPOT-D), a randomized clinical trial: rationale and protocol.
|qualified_impact||Insufficiently evaluated pharmacogenetic|
[PMID 23394390] Influence of genetic polymorphisms in the glutamatergic and GABAergic systems and their interactions with environmental stressors on antidepressant response