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Sci. STKE, 29 May 2001
Vol. 2001, Issue 84, p. pe1
[DOI: 10.1126/stke.2001.84.pe1]

PERSPECTIVES

Neurotrophins: Which Way Did They Go?

Rosalind Segal

The author is in the Department of Neurobiology and Pediatric Oncology in the Dana-Farber Cancer Institute of Harvard Medical School, Boston, MA 02115, USA. E-mail: rosalind_segal{at}dfci.harvard.edu

Abstract: The classic view of the neurotrophin as a messenger produced by the postsynaptic cell that signals survival to the presynaptic cell has become expanded. Segal discusses the evidence that the neurotrophin brain-derived nerve growth factor (BDNF) can be also released from the presynaptic cell onto the dendritic spine of a postsynaptic cell to regulate the neuronal circuit in two directions: forward (from presynaptic cell to postsynaptic dendrite) and the classic backward direction (from postsynaptic cell to the presynaptic axon). These results remind us that in the brain, neurons exist in a complex circuit and one neuron's presynaptic cell is another neuron's postsynaptic cell. The evidence that a single growth factor may have different actions based on the localization of the receipt of the signal adds more complexity to the brain's neuronal circuitry.

Citation: R. Segal, Neurotrophins: Which Way Did They Go? Sci. STKE 2001, pe1 (2001).

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