The role of intestinal alkaline phosphatase in the development of obesity. Modulation of enzyme activity by high fat diet and dietary fiber

• Eleonora A. Efimtseva
• Tamara I. Chelpanova

Abstract

Interest to the tissue-specific intestinal isoenzyme of alkaline phosphatase (IAP) has increased in recent years due to eating disorders that have led to widespread obesity and diet-related diseases. Obesity is considered as an inflammation of low intensity, which is accompanied by the manifestation of various metabolic complications and a disturbance of intestinal homeostasis. IAP is one of the participants in the mechanism of the macroorganism protection against inflammatory and infectious processes, carrying out enzymatic detoxification of bacterial lipopolysaccharide (the trigger of the inflammatory process). Deficiency of IAP activity contributes to the risk of obesity, inflammatory diseases.

The objective of the research was to summarize the current understanding of the role of IAP involved in the molecular mechanism of diet-induced obesity and to evaluate the impact of dietary components – fats and dietary fiber on IAP activity.

Material and methods. A literature search on the role of IAP in the development of obesity was carried out using PubMed, Scopus, Web of Science, Google Scholar, ResearchGate, RSCI databases.

Results. IAP prevents the development of the inflammatory process by participating in the detoxification of toxic bacterial products, limiting the translocation of pathogenic bacteria from the intestine to various tissues and organs of the macroorganism. The enzyme maintains the integrity of the intestinal barrier, influencing the synthesis and proper localization of tight junction’s proteins between intestinal epithelial cells, promotes changes in the composition of the microbiota, decreasing pathogenic bacteria and increasing the population of the community of beneficial microorganisms. IAP is involved in the regulation of fatty acid absorption and influences on the adipogenesis. Monitoring the activity of IAP present in human stool can predict the early development of such complications associated with obesity as metabolic syndrome and diabetes mellitus, Some nutrients modulate IAP activity. Depending on the amount, type, composition of fats and the duration of their consumption, either an increase or decrease in the IAP activity are observed, while dietary fibers stimulate the activity of the enzyme.

Conclusion. IAP activity can be considered as an early predictor of the risk of obesity. Deficiency of IAP activity contributes to the development of obesity caused by high-fat diet. The high activity of the enzyme contributes to the support of intestinal homeostasis and limits transepithelial movement of bacteria, weakening the inflammatory process induced by lipopolysaccharides, the excess concentration of which is detected in obesity. Stimulating enzyme activity through dietary intervention reduces the risk of obesity and metabolic complications.

Keywords:intestinal alkaline phosphatase; inflammation; obesity; high fat diet; dietary fiber

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