Neurotrophin signalling in health and disease

Moses Y. Chao, Rithwick Rajagopal, Francis S. Lee

Research output: Contribution to journalReview articlepeer-review

549 Scopus citations


Neurotrophins are a unique family of polypeptide growth factors that influence the proliferation, differentiation, survival and death of neuronal and non-neuronal cells. They are essential for the health and well-being of the nervous system. NGF (nerve growth factor), BDNF (brain-derived neurotrophic factor), NT-3 (neurotrophin-3) and NT-4 (neurotrophin-4) also mediate additional higher-order activities, such as learning, memory and behaviour, in addition to their established functions for cell survival. The effects of neurotrophins depend upon their levels of availability, their affinity of binding to transmembrane receptors and the downstream signalling cascades that are stimulated after receptor activation. Alterations in neurotrophin levels have been implicated in neurodegenerative disorders, such as Alzheimer's disease and Huntington's disease, as well as psychiatric disorders, including depression and substance abuse. Difficulties in administering trophic factors have led to the consideration of using small molecules, such as GPCR (G-protein-coupled receptor) ligands, which can participate in transactivation events. In this review, we consider the signalling pathways activated by neurotrophins in both health and disease states.

Original languageEnglish
Pages (from-to)167-173
Number of pages7
JournalClinical Science
Issue number2
StatePublished - Feb 2006


  • Nervous system
  • Neurodegenerative disease
  • Neurotrophin
  • Trk receptor


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