Pharmacologic reversal of neurogenic and neuroplastic abnormalities and cognitive impairments without affecting Aβ and tau pathologies in 3xTg-AD mice
| Autor: | Yunn-Chyn Tung, Inge Grundke-Iqbal, Maria del Carmen Cardenas-Aguayo, Frank M. LaFerla, Khalid Iqbal, Lukas Wanka, Julie Blanchard |
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| Rok vydání: | 2010 |
| Předmět: |
Neurogenesis
Blotting Western Hippocampus Mice Transgenic Plaque Amyloid tau Proteins Ciliary neurotrophic factor Protein Structure Secondary Pathology and Forensic Medicine Mice Cellular and Molecular Neuroscience Alzheimer Disease Memory Neuroplasticity medicine Animals Ciliary Neurotrophic Factor Maze Learning Chromatography High Pressure Liquid Amyloid beta-Peptides Neuronal Plasticity biology business.industry Dentate gyrus Neurodegeneration Brain Neurofibrillary Tangles Anatomy medicine.disease Immunohistochemistry Disease Models Animal Neuroprotective Agents medicine.anatomical_structure Cerebral cortex biology.protein Neurology (clinical) Alzheimer's disease Cognition Disorders Peptides business Neuroscience |
| Zdroj: | Acta Neuropathologica. 120:605-621 |
| ISSN: | 1432-0533 0001-6322 |
| DOI: | 10.1007/s00401-010-0734-6 |
| Popis: | In addition to the occurrence of numerous neurofibrillary tangles and Aβ plaques, neurogenesis and neuronal plasticity are markedly altered in Alzheimer disease (AD). Although the most popular therapeutic approach has been to inhibit neurodegeneration, another is to promote neurogenesis and neuronal plasticity by utilizing the regenerative capacity of the brain. Here we show that, in a transgenic mouse model of AD, 3xTg-AD mice, there was a marked deficit in neurogenesis and neuroplasticity, which occurred before the formation of any neurofibrillary tangles or Aβ plaques and was associated with cognitive impairment. Furthermore, peripheral administration of Peptide 6, an 11-mer, which makes an active region of ciliary neurotrophic factor (CNTF, amino acid residues 146-156), restored cognition by enhancing neurogenesis and neuronal plasticity in these mice. Although this treatment had no detectable effect on Aβ and tau pathologies in 9-month animals, it enhanced neurogenesis in dentate gyrus, reduced ectopic birth in the granular cell layer, and increased neuronal plasticity in the hippocampus and cerebral cortex. These findings, for the first time, demonstrate the possibility of therapeutic treatment of AD and related disorders by peripheral administration of a peptide corresponding to a biologically active region of CNTF. |
| Databáze: | OpenAIRE |
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