C. elegans Polyphenol Heat-Stress Screening

ISEF Category: Translational Medical Science

Subcategory: Pre-Clinical Studies  ·  Difficulty: Advanced  ·  Setup: University Lab  ·  Time: Full Year

The Hook

A tiny worm can age in days, not years. That makes C. elegans a fast stand-in for bigger aging studies. If a compound helps worms stay active under heat stress, you get a quick first look at possible geroprotective effects. That is why this model shows up in real aging research.

What Is It?

This project asks whether common polyphenols, like resveratrol, EGCG, and quercetin, help worms handle stress better. Polyphenols are plant compounds that can act like cellular bodyguards. You are not trying to prove a drug works in people. You are testing whether a simple model organism shows a measurable response under controlled stress.

C. elegans is a tiny roundworm that researchers love because it is cheap, fast, and well studied. You can watch movement, survival, and stress response with a camera and image analysis. Think of it like a speed-run version of an aging study. If worms move longer, recover better, or survive heat stress more often, you have a clear signal to analyze.

Why This Is a Good Topic

This is a strong science fair topic because you can measure something real, compare multiple compounds, and build a screen instead of a one-off demo. It connects to aging, stress biology, and drug discovery, which gives your project a real biomedical angle. You can learn experimental design, image quantification, controls, and statistics without needing a huge budget.

Research Questions

• How does resveratrol change C. elegans movement after heat stress?
• What is the effect of EGCG on worm survival under heat stress?
• Does quercetin improve post-stress locomotion more than a no-treatment control?
• To what extent does compound dose change the size of the heat-stress protection effect?
• Which polyphenol gives the strongest improvement in worm movement recovery?
• How does the timing of exposure before stress affect worm survival and movement?

Basic Materials

• Starter culture of C. elegans from a school, university, or mail-order biology supplier
• Nematode growth medium plates or equivalent worm plates
• Bacterial food culture for worms, such as OP50
• Grocery-store polyphenol source or purified resveratrol, EGCG, and quercetin
• Smartphone with time-lapse or video capture
• Tripod or fixed phone mount
• Consistent light source, such as a desk lamp with diffuser
• Disposable transfer tools or sterile picks
• Stereomicroscope or low-power dissecting microscope
• Digital thermometer or temperature probe
• Timer
• Ruler or calibration target for image scaling
• Notebook or spreadsheet for scoring movement and survival
• Gloves, lab coat, and disinfecting supplies.

Advanced Materials

• Incubator or temperature-controlled chamber for stress treatment
• Worm picking microscope and dissecting microscope
• C. elegans synchronization supplies, such as bleach solution and centrifuge access
• Agar plates with defined media
• Micropipettes and sterile tips
• Spectrophotometer or plate reader for optional supporting assays
• Image analysis setup for OpenCV workflows
• Computer with Python and Jupyter Notebook
• Automated worm-tracking software or scripts
• pH meter for media checks
• Analytical balance
• Cold storage for compound solutions and worm stocks.

Software & Tools

• Python: Runs OpenCV scripts for tracking worm movement and extracting motion metrics from video.
• OpenCV: Detects worm contours, movement, and frame-to-frame changes in smartphone videos.
• ImageJ: Measures distances, area, and image quality when you need a quick manual check.
• Jupyter Notebook: Keeps code, notes, and plots in one place for cleaner analysis.
• Google Sheets: Organizes sample metadata, survival scores, and summary statistics.

Experiment Steps

1. Define one main response, such as movement recovery or survival, so your project has a clear endpoint.
2. Choose one stress condition and one exposure window, then keep those constant across all groups.
3. Pick a small set of compounds and decide whether you will test dose, timing, or both.
4. Plan controls that separate true protection from solvent effects, food effects, and handling effects.
5. Build a video and scoring workflow before collecting data so every plate gets measured the same way.
6. Set up a simple analysis plan that compares groups, checks variability, and flags outliers before you start.

Common Pitfalls

• Using worms at mixed ages, which makes lifespan and movement differences hard to interpret.
• Letting plate temperature drift during heat stress, which changes the strength of the stress response.
• Comparing videos with different lighting or camera distance, which breaks movement quantification.
• Assuming a grocery-store polyphenol mix matches a pure compound, which can blur the biological signal.
• Skipping solvent and food controls, which makes it impossible to tell whether the effect came from the compound or the setup.

What Makes This Competitive

A competitive version of this project would do more than compare three compounds. You could add a strong dose-response design, pre-register your scoring rules, and test whether movement tracking matches survival results. Better still, you could compare timing, compound class, and stress severity in one clean framework. That gives you a real screening study, not just a simple class demo.

Project Variations

• Test only one compound class, such as green tea polyphenols, and compare whole-tea extracts with purified EGCG.
• Swap heat stress for oxidative stress and see whether movement protection still matches the heat-stress pattern.
• Focus on analysis instead of biology by comparing manual scoring with OpenCV tracking on the same worm videos.

Learn More

• WormBook: A free, detailed reference on C. elegans biology and methods, available by searching the WormBook site.
• WormBase: A major database for worm genes, strains, and phenotypes, available by searching WormBase.
• PubMed: Search review articles on C. elegans aging, heat stress, and polyphenols.
• NIH PubChem: Look up compound properties, structures, and names for resveratrol, EGCG, and quercetin.
• OpenCV Documentation: Learn the basics of video tracking and image processing for movement analysis.
• MIT OpenCourseWare: Search for free biology, data analysis, and Python materials that can help you plan analysis and coding.