Microinjection of Xenopus oocytes

Area of Science:

• Developmental Biology
• Molecular Biology
• Cell Biology

Background:

• Xenopus oocytes are a widely used model system for biological research.
• Microinjection is a common technique for introducing molecules into cells.
• Understanding the optimal conditions for microinjection is crucial for experimental success.

Purpose of the Study:

• To describe a detailed protocol for microinjecting Xenopus oocytes.
• To outline the capacities of oocyte cytoplasm and nucleus for injected material.
• To ensure oocyte viability during and after microinjection procedures.

Main Methods:

• Microinjection of defolliculated and folliculated Xenopus oocytes.
• Introduction of messenger RNA (mRNA) or DNA constructs.
• Precise volume control for cytoplasmic (up to 50 nL) and nuclear (up to 20 nL) injections.

Main Results:

• Xenopus oocytes can be successfully microinjected with mRNA or DNA.
• Defined volume limits for cytoplasm and nucleus ensure oocyte integrity.
• Oocytes maintain good condition, supporting extended or repeated injection periods.

Conclusions:

• This protocol provides a reliable method for Xenopus oocyte microinjection.
• The technique supports long-term viability and flexibility in experimental design.
• It is applicable to both defolliculated and folliculated oocytes.