[EFFECT OF LIPOPOLYSACCHARIDE ON NEUTRAL LIPID METABOLISM AND CELLULAR ENERGETICS IN FROG URINARY BLADDER EPITHELIAL...

Area of Science:

• Cellular biology
• Biochemistry
• Physiology

Context:

• Gram-negative bacterial colonization of the frog urinary bladder reduces antidiuretic hormone-mediated water reabsorption.
• The role of bacterial components, specifically lipopolysaccharide (LPS), in this physiological impairment requires elucidation.

Purpose:

• To investigate the effects of Escherichia coli lipopolysaccharide (LPS) on neutral lipid metabolism and cellular energetics in isolated frog urinary bladder epithelial cells.
• To determine the impact of LPS on fatty acid oxidation, triacylglycerol (TAG) metabolism, and cellular energy production.

Summary:

• Incubation with LPS decreased fatty acid oxidation and led to triacylglycerol (TAG) retention, increasing cytoplasmic lipid droplets and cellular TAG content.
• LPS reduced oxygen consumption rates and cellular ATP production, despite not altering mitochondrial membrane potential.
• The fatty acid composition of TAG remained unchanged following LPS exposure.

Impact:

• Bacterial-induced reduction in urinary bladder water reabsorption may be linked to LPS-mediated inhibition of fatty acid oxidation.
• Impaired cellular energy metabolism in response to bacterial pathogens contributes to the observed physiological dysfunction.
• Findings provide insights into the molecular mechanisms by which bacterial infections disrupt epithelial cell function and water balance.