Psychopharmacology

, Volume 202, Issue 1–3, pp 37–51 | Cite as

Phospholipase A2 activation as a therapeutic approach for cognitive enhancement in early-stage Alzheimer disease

  • Evelin L. Schaeffer
  • Orestes V. Forlenza
  • Wagner F. Gattaz
Original Investigation

Abstract

Rationale

Alzheimer disease (AD) is the leading cause of dementia in the elderly and has no known cure. Evidence suggests that reduced activity of specific subtypes of intracellular phospholipases A2 (cPLA2 and iPLA2) is an early event in AD and may contribute to memory impairment and neuropathology in the disease.

Objective

The objective of this study was to review the literature focusing on the therapeutic role of PLA2 stimulation by cognitive training and positive modulators, or of supplementation with arachidonic acid (PLA2 product) in facilitating memory function and synaptic transmission and plasticity in either research animals or human subjects.

Methods

MEDLINE database was searched (no date restrictions) for published articles using the keywords Alzheimer disease (mild, moderate, severe), mild cognitive impairment, healthy elderly, rats, mice, phospholipase A2, phospholipid metabolism, phosphatidylcholine, arachidonic acid, cognitive training, learning, memory, long-term potentiation, protein kinases, dietary lipid compounds, cell proliferation, neurogenesis, and neuritogenesis. Reference lists of the identified articles were checked to select additional studies of interest.

Results

Overall, the data suggest that PLA2 activation is induced in the healthy brain during learning and memory. Furthermore, learning seems to regulate endogenous neurogenesis, which has been observed in AD brains. Finally, PLA2 appears to be implicated in homeostatic processes related to neurite outgrowth and differentiation in both neurodevelopmental processes and response to neuronal injury.

Conclusion

The use of positive modulators of PLA2 (especially of cPLA2 and iPLA2) or supplementation with dietary lipid compounds (e.g., arachidonic acid) in combination with cognitive training could be a valuable therapeutic strategy for cognitive enhancement in early-stage AD.

Keywords

Phospholipase A2 Activation Learning Memory Cognitive training Therapeutic Alzheimer disease Mild cognitive impairment 

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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • Evelin L. Schaeffer
    • 1
  • Orestes V. Forlenza
    • 1
  • Wagner F. Gattaz
    • 1
  1. 1.Laboratory of Neuroscience (LIM-27), Department and Institute of Psychiatry, Faculty of MedicineUniversity of São PauloSão PauloBrazil

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