Control of extracellular cleavage of ProBDNF by high frequency neuronal activity Academic Article uri icon

Overview

MeSH Major

  • Brain-Derived Neurotrophic Factor
  • Extracellular Space
  • Neurons

abstract

  • Pro- and mature neurotrophins often elicit opposing biological effects. For example, mature brain-derived neurotrophic factor (mBDNF) is critical for long-term potentiation induced by high-frequency stimulation, whereas proBDNF facilitate long-term depression induced by low-frequency stimulation. Because mBDNF is derived from proBDNF by endoproteolytic cleavage, mechanisms regulating the cleavage of proBDNF may control the direction of BDNF regulation. Using methods that selectively detect proBDNF or mBDNF, we show that low-frequency stimulation induced predominant proBDNF secretion in cultured hippocampal neurons. In contrast, high-frequency stimulation preferentially increased extracellular mBDNF. Inhibition of extracellular, but not intracellular cleavage of proBDNF greatly reduced high-frequency stimulation-induced extracellular mBDNF. Moreover, high-frequency, but not low-frequency stimulation selectively induced the secretion of tissue plasminogen activator, a key protease involved in extracellular proBDNF to mBDNF conversion. Thus, high-frequency neuronal activity controls the ratio of extracellular proBDNF/mBDNF by regulating the secretion of extracellular proteases. Our study demonstrates activity-dependent control of extracellular proteolytic cleavage of a secretory protein, and reveals an important mechanism that controls diametrically opposed functions of BDNF isoforms.

publication date

  • January 27, 2009

Research

keywords

  • Academic Article

Identity

Language

  • eng

PubMed Central ID

  • PMC2633536

Digital Object Identifier (DOI)

  • 10.1073/pnas.0807322106

PubMed ID

  • 19147841

Additional Document Info

start page

  • 1267

end page

  • 72

volume

  • 106

number

  • 4