Early adversity, immunity and infectious disease.

Area of Science:

• Psychoneuroimmunology
• Developmental Psychology
• Infectious Disease Epidemiology

Background:

• Individual health differences arise from complex biological, behavioral, and environmental interactions.
• Early life psychosocial adversities can lead to long-lasting vulnerability to infectious diseases.
• Maternal stress during pregnancy and harsh neonatal conditions impact offspring immune function and disease resistance.

Purpose of the Study:

• To review evidence linking early life psychosocial adversity to increased susceptibility to infectious diseases.
• To explore potential mediating mechanisms for these long-lasting effects.
• To highlight the importance of understanding perinatal stress impacts for therapeutic interventions.

Main Methods:

• Literature review of studies on early life stress and immune function.
• Examination of evidence linking maternal psychosocial stress and neonatal conditions to offspring health outcomes.
• Analysis of potential mediating factors such as the hypothalamic-pituitary-adrenal axis and epigenetic pathways.

Main Results:

• Maternal psychosocial stress during pregnancy is associated with persistent changes in immune function and disease resistance in offspring.
• Harsh neonatal environmental conditions can also induce lasting alterations in host response to infection.
• Potential mediators include altered development of the hypothalamic-pituitary-adrenal axis, epigenetic changes, maternal health behaviors, and prenatal infection.

Conclusions:

• Perinatal psychosocial stress can significantly increase vulnerability to infectious diseases.
• Understanding the mechanisms of immune regulation affected by early adversity is crucial.
• This knowledge can inform therapies aimed at combating infection in susceptible populations and raise awareness of early life event consequences.