Imprinting of maternal thyroid hormones in the offspring

Area of Science:

• Endocrinology
• Neuroscience
• Immunology

Background:

• Thyroid hormones (THs) are crucial for fetal development, especially the central nervous system (CNS).
• TH deficiencies during pregnancy are common and can cause irreversible neurodevelopmental deficits in offspring.
• The impact of TH deficiency on the fetal immune system is less understood, with a prevailing belief of transient and minor effects.

Purpose of the Study:

• To investigate the effects of maternal hypothyroidism on offspring immune system development and function.
• To explore the potential long-term consequences of prenatal TH deficiency on immune-mediated diseases and infections.

Main Methods:

• Review of recent studies examining maternal hypothyroidism and offspring immune outcomes.
• Analysis of findings related to autoimmune-inflammatory diseases (e.g., EAE) and infectious disease resistance in offspring.

Main Results:

• Maternal hypothyroidism alters offspring immune system function.
• Female offspring exposed to prenatal TH deficiency show increased susceptibility to autoimmune diseases like EAE.
• These offspring also exhibit enhanced resistance to bacterial infections.

Conclusions:

• Prenatal thyroid hormone deficiency has significant and potentially lasting effects on the offspring immune system.
• Maternal hypothyroidism can predispose female offspring to autoimmune disorders and alter their response to infections.
• Further research is needed to elucidate mechanisms and implications for human health.