A rabbit jejunal isolated enterocyte preparation suitable for transport studies

Area of Science:

• Gastroenterology
• Cell Biology
• Physiology

Background:

• Enterocytes play a crucial role in nutrient absorption and ion transport in the small intestine.
• Understanding enterocyte function requires reliable methods for isolating viable cells from specific intestinal regions.

Purpose of the Study:

• To describe a novel method for isolating viable enterocytes from the rabbit jejunum.
• To characterize the transport properties and cellular behavior of these isolated enterocytes.

Main Methods:

• Isolation of viable enterocytes from rabbit jejunum.
• Enzymatic assays for sucrase and gamma-glutamyl transferase activity.
• Measurement of alpha-methyl-D-glucoside and alanine uptake.
• Analysis of 42K and 86Rb accumulation and efflux.
• Inhibition studies using phloridzin and ouabain.

Main Results:

• The isolation method yields enterocytes primarily from the upper villus.
• Isolated enterocytes demonstrate active accumulation of alpha-methyl-D-glucoside and alanine.
• Uptake of alpha-methyl-D-glucoside is phloridzin-sensitive, indicating glucose transporter involvement.
• Cells exhibit ouabain-sensitive accumulation of 42K and 86Rb, suggesting Na+/K+-ATPase activity.
• Efflux of 42K and 86Rb occurs from a single intracellular compartment.

Conclusions:

• The described method provides a viable preparation of rabbit jejunal enterocytes for functional studies.
• These isolated cells can be used to investigate the effects of sugars and amino acids on potassium (K) efflux.
• The preparation offers advantages for studying nutrient and ion transport mechanisms in intestinal cells.