D2-Thr92Ala, thyroid hormone levels and biochemical hypothyroidism in preeclampsia.
OBJECTIVE
To identify if there is a relationship between the deiodinase D2-Thr92Ala genetic variant, thyroid hormone levels and biochemical hypothyroidism in preeclampsia.


METHODS
We genotyped 125 women with preeclampsia and 131 normal pregnant women using PCR-RFLP. Serum thyroid hormone levels were determined using ELISA.


RESULTS
Our study showed higher TSH and FT4 levels and lower FT3 levels in women with preeclampsia compared to normal pregnant women, with statistical significance for women with mild and severe preeclampsia. The risk to develop pregnancy-induced hypertension (PIH), mild or severe preeclampsia was increased in carriers of at least one D2-Ala92 allele. TSH and FT4 levels were significantly higher and FT3 levels were significantly lower in preeclamptic women with severe preeclampsia if they carried the D2-Ala92 allele compared to non-carriers. Pregnant women with PIH and mild preeclampsia, carriers of at least one D2-Ala92 allele, delivered at lower gestational age neonates with a lower birth weight compared to non-carriers, but the results were statistically significant only in severe preeclampsia.


CONCLUSIONS
The D2-Thr92Ala genetic variant is associated with the severity and the obstetric outcome of preeclampsia, and it also influences thyroid hormone levels. The study demonstrates non-thyroidal biochemical hypothyroidism - as a result of deiodination effects due to D2 genotypes.
a Department of Medical Biochemistry , "Iuliu Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca , Romania.
Lucia Maria
LM
Procopciuc
b Department of Gynecology Clinic I , "Iuliu Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca , Romania , and.
Gabriela
G
Caracostea
c Clinic of Endocrinology , Cluj-Napoca , Romania.
Georgeta
G
Hazi
b Department of Gynecology Clinic I , "Iuliu Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca , Romania , and.
Georgiana
G
Nemeti
b Department of Gynecology Clinic I , "Iuliu Hatieganu" University of Medicine and Pharmacy , Cluj-Napoca , Romania , and.
Florin
F
Stamatian
D000328:Adult; D001724:Birth Weight; D005260:Female; D005865:Gestational Age; D006801:Humans; D007037:Hypothyroidism / Q000097:blood* / Q000235:genetics*; D007231:Infant, Newborn; D007453:Iodide Peroxidase / Q000235:genetics*; D007752:Obstetric Labor, Premature / Q000097:blood* / Q000235:genetics*; D011225:Pre-Eclampsia / Q000097:blood* / Q000235:genetics*; D011247:Pregnancy; D012720:Severity of Illness Index; D013963:Thyroid Hormones / Q000097:blood*; D000097564:Iodothyronine Deiodinase Type II
D007453:Iodide Peroxidase; D013963:Thyroid Hormones; D000097564:Iodothyronine Deiodinase Type II
Biochemical hypothyroidism; D2 genotypes; genetic and biochemical evaluation; preeclampsia; thyroid hormones levels