Holocaust Exposure Induced Intergenerational Effects on FKBP5 Methylation

Area of Science:

• Genetics
• Epigenetics
• Psychiatry

Background:

• Epigenetic mechanisms are implicated in intergenerational stress transmission in animals.
• Human studies demonstrating this link are limited.

Purpose of the Study:

• To investigate the intergenerational effects of parental trauma on FKBP5 gene methylation in Holocaust survivors and their offspring.
• To explore the association between FKBP5 methylation, trauma exposure, and physiological stress markers.

Main Methods:

• Measured cytosine methylation in the FKBP5 gene in Holocaust survivors, their offspring, and control groups.
• Analyzed CpG sites near intron 7 glucocorticoid response elements.
• Correlated methylation levels with parental trauma, offspring's childhood abuse, and wake-up cortisol.

Main Results:

• Holocaust exposure affected FKBP5 methylation in parents and offspring, with site-specific differences.
• Parental and offspring methylation levels were correlated.
• FKBP5 methylation was associated with wake-up cortisol, indicating functional relevance.

Conclusions:

• This study provides the first evidence of preconception parental trauma associated with epigenetic alterations in both parents and offspring.
• Findings suggest potential site-specific epigenetic modifications influenced by parental and offspring trauma.
• These results offer insights into the intergenerational transmission of severe psychophysiological trauma.