Deiodinases, organic anion transporter polypeptide polymorphisms and ischemic stroke outcomes

Published:September 11, 2019DOI:


      • Functional outcome after stroke is determined in part by genetic factors.
      • Stroke activates the thyroid axis, so we examined SNPs of DIO1–3 and OATP1C1.
      • DIO3 rs945006-T/G and OATP1C1 rs10770704-C/T predicted 1-year functional outcome.



      Ischemic stroke is a major cause of premature death and chronic disability worldwide, and individual variation in functional outcome is strongly influenced by genetic factors. Neuroendocrine signaling by the hypothalamic−hypophyseal−thyroid axis is a critical regulator of post-stroke pathogenesis, suggesting that allelic variants in thyroid hormone (TH) signaling can influence stroke outcome.
      Aim: To examine associations between acute ischemic stroke (AIS) outcome and allelic variants of the TH metabolizing enzymes deiodinase type 1–3 (DIO1–3) and membrane transporting organic anion polypeptide C1 (OATP1C1).


      Eligible AIS patients from Lithuania (n = 248) were genotyped for ten DIO1–3 and OATP1C1 single nucleotide polymorphisms (SNPs): DIO1 rs12095080-A/G, rs11206244-C/T, and rs2235544-A/C; DIO2 rs225014-T/C and rs225015-G/A; DIO3 rs945006-T/G; OATP1C1 rs974453-G/A, rs10444412-T/C, rs10770704-C/T, and rs1515777-A/G. Functional outcome was evaluated one year after index AIS using the modified Rankin Scale. Analyses were adjusted for important confounders, including serum free triiodothyronine.


      After adjustment for potential confounders, the major allelic (wild-type) DIO3 genotype rs945006-TT was associated with better 1-year AIS functional outcome (odds ratio [OR] = 0.25; 95% confidence interval [CI]: 0.08–0.74; p = .013), while the wild-type OATP1C1 genotype rs10770704-CC was associated with poorer outcome (OR = 2.00, 95%CI: 1.04–3.86; p = .038).


      Allelic variants in thyroid axis genes may prove useful for prognosis and treatment guidance.


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