Trehalose of Culex pipiens fatigans.

Area of Science:

• Entomology
• Biochemistry
• Insect Physiology

Background:

• Trehalose is a crucial disaccharide in insect physiology, serving as a primary energy source.
• Understanding trehalose metabolism is vital for comprehending insect stress responses and energy management.

Purpose of the Study:

• To quantify trehalose levels in different developmental stages of Culex pipiens fatigans.
• To investigate the impact of induced stress on trehalose and glucose levels.
• To explore the metabolic fate of trehalose in adult mosquitoes.

Main Methods:

• Quantification of free sugars, including trehalose, in various life stages of Culex pipiens fatigans.
• Induction of stress conditions in mosquito larvae and adults.
• Metabolic labeling using alpha,alpha'-U-14C-trehalose to trace its incorporation into lipids.

Main Results:

• Trehalose constituted 23-49% of total free sugars in different developmental stages.
• Larval trehalose and adult glucose levels significantly decreased under stress conditions.
• 14C-labeled trehalose was readily incorporated into adult lipids, with triglycerides showing rapid turnover.

Conclusions:

• Trehalose plays a significant role in the energy metabolism of Culex pipiens fatigans throughout its life cycle.
• Stress significantly alters carbohydrate metabolism in mosquitoes, impacting trehalose and glucose.
• Adult mosquitoes metabolize trehalose into lipids, indicating its involvement in energy storage and rapid energy mobilization.