Innate Immunity in Autoimmune Thyroid Disease during Pregnancy

Area of Science:

• Endocrinology
• Immunology
• Reproductive Medicine

Background:

• Autoimmune thyroid disease (AITD), including Hashimoto thyroiditis (HT) and Graves' disease (GD), is common.
• AITD arises from complex genetic, environmental, and immune factors.
• Pregnancy significantly alters thyroid function due to metabolic and hormonal changes.

Purpose of the Study:

• To examine the influence of pregnancy on autoimmune thyroid disease.
• To understand the role of maternal immune system adaptations during pregnancy in AITD.
• To highlight the risks of untreated thyroid disorders on fertility and pregnancy outcomes.

Main Methods:

• Review of existing literature on AITD, pregnancy, and immune system modulation.
• Analysis of hormonal influences (estrogen, progesterone, hCG) on innate immune cells, particularly NK cells.
• Examination of the impact of pre-existing thyroid disorders on reproductive health.

Main Results:

• Pregnancy-induced immune adaptations and hormonal changes can exacerbate AITD, especially impacting NK cells.
• Pre-existing thyroid dysfunction poses risks including infertility, placental abruption, miscarriage, and premature birth.
• Fetal complications include growth retardation and potential neurodevelopmental impairment.

Conclusions:

• Maintaining thyroid equilibrium in women of reproductive age and during pregnancy is critical.
• Hormonal modulation of innate immunity during pregnancy may worsen AITD.
• Effective management of AITD is essential for successful pregnancy outcomes.