A YY1-dependent increase in aerobic metabolism is indispensable for intestinal organogenesis

Area of Science:

• Developmental Biology
• Molecular Biology
• Neonatal Medicine

Background:

• Intestinal villus development is critical for neonatal gut function.
• Incomplete intestinal development is a common neonatal gastrointestinal complication with unclear causes.

Purpose of the Study:

• To investigate the role of Yin Yang 1 (Yy1) in mouse intestinal villus development.
• To explore the link between metabolic regulation, specifically oxidative phosphorylation, and intestinal organogenesis.

Main Methods:

• Utilized a mouse model with targeted Yy1 loss in the developing endoderm.
• Performed transcriptome analysis to identify affected gene expression pathways.
• Conducted ultrastructural analysis to assess mitochondrial integrity.
• Investigated the effects of mitochondrial inhibitors on villus growth.

Main Results:

• Yy1 loss in mice led to poor intestinal differentiation and stunted villi during late gestation.
• YY1 is required for mitochondrial gene expression and maintaining mitochondrial integrity.
• Oxidative phosphorylation gene expression correlated with villus elongation, and inhibitors mimicked Yy1 loss effects.
• Necrotizing enterocolitis patients showed decreased oxidative phosphorylation gene expression.

Conclusions:

• Yin Yang 1 (Yy1) is crucial for intestinal villus development by regulating mitochondrial function.
• Oxidative phosphorylation plays a significant role in regulating late-gestation intestinal growth.
• Metabolic dysregulation may contribute to neonatal gastrointestinal disorders like necrotizing enterocolitis.