The birth and death of dopamine neurons: A new model for neurodegeneration

Dec 10, 2007

The gradual loss of dopamine neurons is a hallmark of many neurodegenerative diseases - Parkinson’s Disease chief among them. Stem cell biology and regenerative medicine offer novel therapies for the restoration of dopamine neurons.

This week in the online open-access journal PLoS Biology Dr. Raja Kittappa, Dr. Wendy Chang, Dr. Rajeshwar Awatramani, and Dr. Ronald McKay show that the transcription factor FOXA2 plays a central role in the birth and death of dopamine neurons in the midbrain.

By defining precursors of dopamine neurons in the ventral midbrain, Kittappa et. al. have discovered that dopamine neurons are derived from organizer cells in the floor plate (the ventral cells of the neural tube and the embryonic foundation of the central nervous system). They also show that FOXA2 specifies the floor plate and actually induces the birth of dopamine neurons.

Mice with only a single copy of the foxa2 gene acquire motor deficits and a late-onset degeneration of dopamine neurons. This spontaneous cell death preferentially affects neurons associated with Parkinson disease. This work provides new strategies to generate neurons in the laboratory and to block their death in old age.

Citation: Kittappa R, Chang WW, Awatramani RB, McKay RDG (2007) The foxa2 gene controls the birth and spontaneous degeneration of dopamine neurons in old age. PLoS Biol 5(12): e325. doi:10.1371/journal.pbio.0050325 (www.plosbiology.org)

Source: Public Library of Science

Explore further: Rafts on the cell membrane

Related Stories

Devices or divisive: Mobile technology in the classroom

9 hours ago

Little is known about how new mobile technologies affect students' development of non-cognitive skills such as empathy, self-control, problem solving, and teamwork. Two Boston College researchers say it's ...

Recommended for you

Rafts on the cell membrane

18 minutes ago

Tiny structures made of lipid molecules and proteins have been believed to wander within the membrane of a cell, much like rafts on the water. This "raft hypothesis" has been widely accepted, but now scientists ...

Researchers explain skin fusion at a molecular level

20 minutes ago

Scientists from the Goethe University (GU) Frankfurt, the European Molecular Biology Laboratory (EMBL) Heidelberg and the University of Zurich explain skin fusion at a molecular level and pinpoint the specific ...

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.