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Related Experiment Videos

Is prostaglandin E(2) a pathogenic factor in amyotrophic lateral sclerosis?

Gabriele Almer1, Hitoshi Kikuchi, Peter Teismann

  • 1Department of Neurology, Columbia University, New York, NY 10032, USA.

Annals of Neurology
|April 19, 2006
PubMed
Summary

Cyclooxygenase-1 (Cox1) produces prostaglandin E(2) in ALS, but its ablation does not prevent neurodegeneration. Cox-2

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Area of Science:

  • Neuroscience
  • Biochemistry
  • Genetics

Background:

  • Amyotrophic lateral sclerosis (ALS) is a fatal paralytic disorder caused by mutations in superoxide dismutase-1.
  • Previous research suggested prostaglandin E(2) (PGE(2)), a product of cyclooxygenase-2 (Cox-2), might be pathogenic in ALS.

Purpose of the Study:

  • To investigate the specific roles of cyclooxygenase-1 (Cox1) and prostaglandin E(2) in ALS neurodegeneration.
  • To clarify the mechanism by which Cox-2 influences ALS pathology.

Main Methods:

  • Genetic ablation of cyclooxygenase-1 (Cox1) in a mouse model of ALS.
  • Analysis of prostaglandin E(2) production in the spinal cord.
  • Assessment of neurodegeneration in the absence of Cox1.

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Main Results:

  • Prostaglandin E(2) in the spinal cord is primarily synthesized by Cox1.
  • Ablation of Cox1 did not attenuate neurodegeneration in the ALS mouse model.
  • The previously observed neuroprotective effect of Cox-2 inhibition in this model is independent of prostaglandin E(2).

Conclusions:

  • Cox1-derived prostaglandin E(2) is not a primary driver of neurodegeneration in this ALS mouse model.
  • Targeting Cox1 with inhibitors is unlikely to be an effective neuroprotective strategy for ALS.
  • The role of Cox-2 in ALS neurodegeneration involves mechanisms other than prostaglandin E(2) production.