Use of sea stars to study basic reproductive processes

Area of Science:

• Developmental Biology
• Invertebrate Zoology
• Reproductive Biology

Background:

• Echinoderms, including sea stars, are invertebrate deuterostomes closely related to chordates.
• Sea stars are broadcast spawners, producing millions of large, accessible oocytes.
• Oocytes are arrested in meiosis and can be induced to mature synchronously or individually.

Purpose of the Study:

• To provide fundamental protocols for sea star oocyte manipulation.
• To enable new investigators to utilize sea stars in reproductive and developmental studies.
• To facilitate techniques like microinjection and quantitative PCR on sea star oocytes.

Main Methods:

• Isolation of millions of sea star oocytes and eggs.
• Induction of meiotic maturation using 1-methyladenine.
• Microinjection and cell culture for quantitative or repetitive methods.
• Single cell quantitative PCR (qPCR) for molecular analysis.

Main Results:

• Sea star oocytes are readily accessible and amenable to manipulation.
• 1-methyladenine effectively induces meiotic maturation.
• High-throughput microinjection and culture methods are feasible.
• Single cell qPCR protocols can be applied.

Conclusions:

• Sea stars offer a robust model system for reproductive and developmental biology research.
• Established protocols facilitate diverse experimental approaches, including molecular analyses.
• This review serves as a guide for incorporating sea star oocytes into research.