Ciliary neurotrophic factor cell-based delivery prevents synaptic impairment and improves memory in mouse models of Alzheimer's disease

Pierre Garcia, Ihsen Youssef, Jo K. Utvik, Sabrina Florent-Béchard, Vanassa Barthélémy, Catherine Malaplate-Armand, Badreddine Kriem, Christophe Stenger, Violette Koziel, Jean Luc Olivier, Marie Christine Escanye, Marine Hanse, Ahmad Allouche, Cédric Desbène, Frances T. Yen, Rolf Bjerkvig, Thierry Oster, Simone P. Niclou, Thierry Pillot*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

101 Citations (Scopus)

Abstract

The development of novel therapeutic strategies for Alzheimer's disease (AD) represents one of the biggest unmet medical needs today. Application of neurotrophic factors able to modulate neuronal survival and synaptic connectivity is a promising therapeutic approach for AD. We aimed to determine whether the loco-regional delivery of ciliary neurotrophic factor (CNTF) could prevent amyloid-β (Aβ) oligomer-induced synaptic damages and associated cognitive impairments that typify AD. To ensure long-term administration of CNTF in the brain, we used recombinant cells secreting CNTF encapsulated in alginate polymers. The implantation of these bioreactors in the brain of Aβ oligomer-infused mice led to a continuous secretion of recombinant CNTF and was associated with the robust improvement of cognitive performances. Most importantly, CNTF led to full recovery of cognitive functions associated with the stabilization of synaptic protein levels in the Tg2576 AD mouse model. In vitro as well as in vivo, CNTF activated a Janus kinase/signal transducer and activator of transcription-mediated survival pathway that prevented synaptic and neuronal degeneration. These preclinical studies suggest that CNTF and/or CNTF receptor-associated pathways may have AD-modifying activity through protection against progressive Aβ-related memory deficits. Our data also encourage additional exploration of ex vivo gene transfer for the prevention and/or treatment of AD.

Original languageEnglish
Pages (from-to)7516-7527
Number of pages12
JournalJournal of Neuroscience
Volume30
Issue number22
DOIs
Publication statusPublished - 2 Jun 2010

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