Using Low-Cost Dyes to Visualize Glycogen Accumulation and Gut Integrity in Caenorhabditis elegans

Overview

This study explores the use of the nematode Caenorhabditis elegans to engage students in biological sciences through experimentation. The protocols described focus on investigating metabolic processes related to diet and the aging process, utilizing the worm's transparency and colored dyes for visual assessment.

Key Study Components

Research Area

• Educational biology
• Metabolism and aging
• Experimental design for students

Background

• Caenorhabditis elegans is an easily manipulated model organism.
• The transparency of the worm allows for direct observation of internal processes.
• Understanding the effects of diet and aging can be demonstrated through hands-on assays.

Methods Used

• Assays using iodine staining for glycogen assessment.
• Intestinal permeability tests with colored dyes.
• Use of Escherichia coli as a food source for experimental groups.

Main Results

• Fasting worms exhibited lower glycogen levels compared to those fed a high-calorie diet.
• The blue staining in the intestinal permeability assay indicated a compromised gut integrity in worms.
• Both assays provide clear, observable results supporting metabolic and aging research.

Conclusions

• The protocols effectively teach students about experimental biology.
• They serve as accessible models to study carbohydrate metabolism and aging processes.

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