Adversity in childhood linked to elevated striatal dopamine function in adulthood

Area of Science:

• Neuroscience
• Psychiatry
• Dopamine Research

Background:

• Childhood adversity is a known risk factor for adult psychosis.
• Theoretical and animal models suggest dopamine dysregulation may mediate this link.
• Striatal dopamine function is implicated in psychosis development.

Purpose of the Study:

• To investigate the association between childhood adversity and striatal dopamine function in early adulthood.
• To compare childhood adversity exposure and dopamine function in individuals at ultra high risk (UHR) of psychosis versus healthy controls.

Main Methods:

• Sixty-seven young adults (47 UHR, 20 controls) underwent 18F-DOPA positron emission tomography to assess presynaptic dopamine function.
• Childhood adversity was measured using the Childhood Experience of Care and Abuse questionnaire.
• Participants were matched for age, gender, and substance use.

Main Results:

• Severe physical/sexual abuse and unstable family arrangements in childhood were significantly associated with elevated striatal dopamine function in adulthood.
• No significant differences in childhood adversity or dopamine function were found between the UHR and healthy volunteer groups.
• The overall sample demonstrated a link between childhood adversity and increased adult striatal dopamine function.

Conclusions:

• Childhood adversity is associated with altered striatal dopamine neurotransmission in adulthood.
• This finding supports the hypothesis that dopamine dysregulation may be a mechanism linking early life stress to psychosis risk.
• Further research is needed to explore the specific pathways and implications for psychosis prevention.