Microbiome, inflammation, epigenetic alterations, and mental diseases

Area of Science:

• Neuroscience
• Genetics
• Psychiatry

Background:

• Major mental diseases (autism, bipolar disorder, schizophrenia, major depressive disorder) have complex, multifactorial etiologies.
• The traditional one-gene, one-disease model is insufficient; polygenic interactions are implicated.
• Environmental factors significantly influence gene regulation in pathogenesis.

Purpose of the Study:

• To review the interplay of diet, gastrointestinal microbiome, inflammation, and epigenetic alterations in psychiatric disorders.
• To explore how environmental factors modulate gene expression relevant to mental health.
• To highlight the role of epigenetics in the pathogenesis of major mental illnesses.

Main Methods:

• Literature review focusing on epigenetic mechanisms (DNA methylation, histone modifications, RNA interference).
• Analysis of the impact of environmental factors (diet, gut microbiota, infections) on epigenetic modifications.
• Examination of the gut-brain axis and its influence on psychiatric disorders.

Main Results:

• Epigenetic modifications are crucial mediators between environmental factors and gene expression in mental disorders.
• Diet and gut microbiota can alter DNA methylation and histone signatures.
• Gut microbes influence the gut-brain axis through inflammatory cytokines, neurotransmitter production, and epigenetic modulation.

Conclusions:

• Epigenetic alterations are central to understanding the pathogenesis of major mental diseases.
• Diet and gut microbiome represent significant modifiable targets for psychiatric disorder intervention.
• Further research into the gut-brain-epigenome axis is warranted for novel therapeutic strategies.