Integrated holographic system for all-optical manipulation of developing embryos

Area of Science:

• Developmental Biology
• Biotechnology
• Optical Physics

Background:

• Precise manipulation of developing embryos is crucial for understanding cell lineage and genetic modification.
• Existing methods for intracellular delivery and embryo manipulation can be invasive or lack precision.

Purpose of the Study:

• To demonstrate an integrated system for simultaneous optical injection and trapping of developing embryos.
• To establish a versatile all-optical platform for advanced developmental biology applications.

Main Methods:

• Utilized a Ti:sapphire femtosecond laser coupled with a spatial light modulator for beam steering and multiplexing.
• Performed intracellular delivery of impermeable molecules into annelid embryos (Pomatoceros lamarckii) via optoinjection.
• Employed continuous wave laser mode for optical trapping and orientation of embryos while preserving viability.

Main Results:

• Successfully achieved intracellular delivery of molecules into individual blastomeres, even through the chorion.
• Demonstrated delivery into inner cell layers of well-developed embryos.
• Showcased the ability to optically trap and orient 60 μm embryos without compromising viability.

Conclusions:

• Developed a complete all-optical manipulation platform for developing embryos.
• This technology facilitates single-cell genetic modification and cell lineage mapping in novel model species.
• Paves the way for new research avenues in developmental biology.