Time-lapse imaging system with shell-less culture chamber.

Area of Science:

• Developmental Biology
• Microscopy
• Biotechnology

Background:

• Observing early embryonic development in vivo presents technical challenges.
• Existing microscopy methods often lack the necessary resolution or environmental control for prolonged imaging.
• Tracking cellular dynamics and gene expression during embryogenesis requires advanced imaging techniques.

Purpose of the Study:

• To develop and validate a novel imaging system for whole chick embryos.
• To enable long-term, in vivo observation of fluorescent protein expression in developing embryos.
• To facilitate high-resolution imaging at the single-cell level within a controlled embryonic environment.

Main Methods:

• A custom-built, humidified, and heated culture chamber was designed.
• A fixed-stage upright fluorescent microscope with long-working distance objective lenses was utilized.
• Whole chick embryos (embryonic day 1.5-4.5) were cultured and imaged in vivo.
• Heaters and a water bath maintained optimal temperature and humidity, while a top glass heater minimized condensation.

Main Results:

• The system successfully imaged whole chick embryos from E1.5 to E4.5.
• Fluorescent protein expression was detected at the single-cell level.
• The system enabled in vivo tracing of fluorescently labeled cells for up to 17 hours.
• High-resolution imaging was achieved despite the humidified chamber environment.

Conclusions:

• The developed imaging system is effective for time-lapse analysis of chick embryos.
• It allows for extended observation of fluorescent protein expression and distribution in vivo.
• This technology provides a valuable tool for studying early developmental processes and cellular dynamics.