Spatiotemporal Metabolic Liver Zonation and Consequences on Pathophysiology

Area of Science:

• Hepatology
• Molecular Biology
• Metabolic Physiology

Background:

• Hepatocytes perform critical metabolic functions, including nutrient processing, protein synthesis, and maintaining homeostasis.
• Metabolic zonation, the division of labor among hepatocytes, is essential for coordinating complex metabolic pathways.
• This zonation has both spatial (lobular zones) and temporal (feeding/fasting cycles) dimensions.

Purpose of the Study:

• To review the current understanding of spatiotemporal metabolic liver zonation.
• To explore the consequences of disrupted liver zonation on liver pathobiology.
• To highlight the role of gene expression networks in liver function and disease.

Main Methods:

• Literature review of studies on liver zonation and metabolic processes.
• Analysis of recent technological advancements in gene expression profiling.
• Synthesis of current knowledge on spatial and temporal metabolic organization in the liver.

Main Results:

• Metabolic zonation ensures efficient sequential processing of metabolic tasks within distinct hepatocyte zones.
• Temporal control of hepatocyte functions aligns metabolic processes with physiological cycles.
• Impaired liver zonation is linked to metabolic diseases, including nonalcoholic steatohepatitis and diabetes.

Conclusions:

• Spatiotemporal metabolic liver zonation is a fundamental principle of liver function.
• Disruption of this organization has significant local and systemic health consequences.
• Understanding these networks is crucial for deciphering liver pathobiology and developing therapeutic strategies.