Development and regeneration

Researchers in the lab of Whitehead Institute Member Iain Cheeseman explore the developmental origins of a body plan in bat stars.

Some of the most important tools in researchers’ toolkits are the model organisms they use to study biological questions. How do researchers decide which species, out of the millions that exist, to develop as models? Whitehead Institute researchers have had a hand in establishing and promoting the use of several model organisms over the years.

The Whitehead Fellows program is renowned for preparing emerging leaders in biomedical research and education. Two recent Fellows who made significant accomplishments while at the Institute are continuing that track record.

This edition of Unusual Labmates, our series on the species used for research at Whitehead Institute, focuses on fruit flies. Fruit flies may seem like pests when they are encountered in the wild. However, they have been used in research for more than a century, and in that time, they have been engineered to become powerful, malleable models capable of answering questions in many areas of research.

Researchers in Whitehead Institute Director Ruth Lehmann’s lab have discovered that swarm cells, a previously enigmatic cell type, help primordial germ cells time their transformation during development so that the ovary can successfully assemble for egg production. 

Melissa Pamula is a postdoc in Whitehead Institute Director Ruth Lehmann’s lab studying the cells that make and become eggs and sperm. We sat down with Melissa to learn more about her and her experiences in and out of the lab.

Researchers at Whitehead Institute propose a new model for how the stem cells in aquatic worms called planarians commit to a specific fate. Instead of a long, slow process that occurs over many generations, the researchers suggest that the transition from “blank” stem cells to specialized cells could happen in a single division.