Related Experiment Videos
Anticipation and imprinting in schizophrenia
Biological Psychiatry
|November 5, 1997
Summary
Anticipation and imprinting, genetic phenomena affecting disease onset and severity across generations, were investigated in familial schizophrenia. Findings suggest these patterns are present in schizophrenia, with earlier onset observed in offspring.
Area of Science:
- Psychiatry
- Genetics
- Neuroscience
Background:
- Anticipation (earlier onset/increased severity) and imprinting (parental transmission differences) are noted in repeat expansion diseases.
- Their role in familial schizophrenia remains largely uncharacterized.
Purpose of the Study:
- To investigate the association of anticipation and imprinting with familial schizophrenia.
- To compare generational differences in schizophrenia onset and clinical features.
Main Methods:
- Studied two generations from 24 families with schizophrenia (49 individuals).
- Compared age of onset, hospitalization rates, diagnostic subtypes, medication, symptom severity (positive/negative), treatment resistance, and clinical course between generations.
- Analyzed generational differences based on paternal vs. maternal transmission.
Main Results:
- Offspring generation showed a significantly earlier age of onset compared to the previous generation.
- No significant difference in disease severity was observed between generations.
- Offspring with paternal transmission exhibited significantly higher negative symptom and clinical course scores than those with maternal transmission.
Conclusions:
- The study provides evidence suggesting the presence of anticipation and imprinting in familial schizophrenia.
- Paternal transmission may be associated with more severe negative symptoms and a poorer clinical course in schizophrenia.