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Carbamylated erythropoietin ameliorates hypoxia-induced cognitive and behavioral defects with the generation of choline acetyltransferase-positive neurons.

Abstract
Carbamylated erythropoietin (CEPO) is attracting widespread interest because of its neuroprotective effects without influencing erythropoiesis. Here we show that CEPO, unlike EPO, does not stimulate erythropoiesis. Both CEPO and EPO inhibit the death/apoptosis of neurons in the hypoxic model of primary neurons and induce neuron proliferation and differentiation in hypoxic mice. Hypoxic mice show apparent memory deficits at 3 and 30 days after hypoxia. The administration of CEPO/EPO significantly improves cognitive and behavioral defects after hypoxic insults. Further investigation shows that CEPO/EPO induces neuron proliferation and differentiation and promotes the generation of choline acetyltransferase (ChAT)(+) neurons in hypoxic mice. Phosphorylated AKT was colabeled with ChAT(+) neurons and coexpressed in bromodeoxyuridine-positive cells, suggesting that the PI3K/AKT pathway may play a pivotal role in CEPO/EPO-cholinergic neuron generation. These results reveal that CEPO/EPO ameliorates hypoxia-induced cognitive and behavioral defects possibly through the generation of ChAT-positive neurons.
AuthorsJing Ding, Qin-Ying Li, Jie-Zhong Yu, Xin Wang, Chuan-Zhen Lu, Cun-Gen Ma, Bao-Guo Xiao
JournalJournal of neuroscience research (J Neurosci Res) Vol. 91 Issue 1 Pg. 73-82 (Jan 2013) ISSN: 1097-4547 [Electronic] United States
PMID23074165 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
CopyrightCopyright © 2012 Wiley Periodicals, Inc.
Chemical References
  • Neuroprotective Agents
  • carbamylated erythropoietin
  • Erythropoietin
  • Choline O-Acetyltransferase
Topics
  • Animals
  • Apoptosis (drug effects)
  • Cell Differentiation (drug effects)
  • Cell Proliferation (drug effects)
  • Choline O-Acetyltransferase (metabolism)
  • Cognition Disorders (etiology, prevention & control)
  • Erythropoietin (analogs & derivatives, pharmacology)
  • Flow Cytometry
  • Hypoxia (complications)
  • Immunohistochemistry
  • In Situ Nick-End Labeling
  • Male
  • Mice
  • Mice, Inbred C57BL
  • Neurons (drug effects, metabolism)
  • Neuroprotective Agents (pharmacology)

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