Book contents
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Basic aspects of neurodegeneration
- 1 Endogenous free radicals and antioxidants in the brain
- 2 Biological oxidants and therapeutic antioxidants
- 3 Mitochondria, metabolic inhibitors and neurodegeneration
- 4 Excitoxicity and excitatory amino acid antagonists in chronic neurodegenerative diseases
- 5 Glutamate transporters
- 6 Calcium binding proteins in selective vulnerability of motor neurons
- 7 Apoptosis in neurodegenerative diseases
- 8 Neurotrophic factors
- 9 Protein misfolding and cellular defense mechanisms in neurodegenerative diseases
- 10 Neurodegenerative disease and the repair of oxidatively damaged DNA
- 11 Compounds acting on ion channels
- 12 The role of nitric oxide and PARP in neuronal cell death
- 13 Copper and zinc in Alzheimer's disease and amyotrophic lateral sclerosis
- 14 The role of inflammation in Alzheimer's disease neuropathology and clinical dementia. From epidemiology to treatment
- 15 Selected genetically engineered models relevant to human neurodegenerative disease
- 16 Toxic animal models
- 17 A genetic outline of the pathways to cell death in Alzheimer's disease, Parkinson's disease, frontal dementias and related disorders
- 18 Neurophysiology of Parkinson's disease, levodopa-induced dyskinesias, dystonia, Huntington's disease and myoclonus
- Part II Neuroimaging in neurodegeneration
- Part III Therapeutic approaches in neurodegeneration
- Normal aging
- Part IV Alzheimer's disease
- Part VI Other Dementias
- Part VII Parkinson's and related movement disorders
- Part VIII Cerebellar degenerations
- Part IX Motor neuron diseases
- Part X Other neurodegenerative diseases
- Index
- References
6 - Calcium binding proteins in selective vulnerability of motor neurons
from Part I - Basic aspects of neurodegeneration
Published online by Cambridge University Press: 04 August 2010
- Frontmatter
- Contents
- List of contributors
- Preface
- Part I Basic aspects of neurodegeneration
- 1 Endogenous free radicals and antioxidants in the brain
- 2 Biological oxidants and therapeutic antioxidants
- 3 Mitochondria, metabolic inhibitors and neurodegeneration
- 4 Excitoxicity and excitatory amino acid antagonists in chronic neurodegenerative diseases
- 5 Glutamate transporters
- 6 Calcium binding proteins in selective vulnerability of motor neurons
- 7 Apoptosis in neurodegenerative diseases
- 8 Neurotrophic factors
- 9 Protein misfolding and cellular defense mechanisms in neurodegenerative diseases
- 10 Neurodegenerative disease and the repair of oxidatively damaged DNA
- 11 Compounds acting on ion channels
- 12 The role of nitric oxide and PARP in neuronal cell death
- 13 Copper and zinc in Alzheimer's disease and amyotrophic lateral sclerosis
- 14 The role of inflammation in Alzheimer's disease neuropathology and clinical dementia. From epidemiology to treatment
- 15 Selected genetically engineered models relevant to human neurodegenerative disease
- 16 Toxic animal models
- 17 A genetic outline of the pathways to cell death in Alzheimer's disease, Parkinson's disease, frontal dementias and related disorders
- 18 Neurophysiology of Parkinson's disease, levodopa-induced dyskinesias, dystonia, Huntington's disease and myoclonus
- Part II Neuroimaging in neurodegeneration
- Part III Therapeutic approaches in neurodegeneration
- Normal aging
- Part IV Alzheimer's disease
- Part VI Other Dementias
- Part VII Parkinson's and related movement disorders
- Part VIII Cerebellar degenerations
- Part IX Motor neuron diseases
- Part X Other neurodegenerative diseases
- Index
- References
Summary
Introduction
Since the mid-1990s, the specific etiologies and mechanisms leading to dysfunction and loss of motor neurons in ALS have been under intensive investigation. No single mechanism appears to explain the devastating and inexorable injury to motor neurons. What appears far more likely is a convergence of a number of different mechanisms that collectively or sequentially impair motor neuron structure and function. Among the various proposals implicated, increased free radicals and oxidative stress, increased glutamate excitotoxicity, increased cellular aggregates and increased intracellular calcium have received the most attention (Rothstein, 1995; Cleveland, 1999; Shaw & Eggett, 2000; Rowland, 2000; Julien, 2001; Rowland & Shneider, 2001; Cleveland & Rothstein, 2001). None of these mechanisms is mutually exclusive and altered calcium homeostasis, free radicals, and glutamate excitotoxicity may all participate in the cell injury cascade leading to motor neuron death. Alterations in one parameter can lead to alterations in other parameters, and each can enhance and propagate the injury cascade. Such perturbations could critically impair motor neuron mitochondria and neurofilaments, compromise energy production and axoplasmic flow, and impair synaptic function. However, these alterations would be expected to adversely affect most neurons, and the critical question is why motor neurons are uniquely sensitive to injury in ALS, and why some motor neurons are relatively resistant to injury. Our own hypothesis focuses on the critical role of intracellular calcium and the inability of vulnerable motor neurons to handle an increased intracellular calcium load, possibly related to the relative paucity of the calcium binding proteins, calbindin D28k and parvalbumin.
- Type
- Chapter
- Information
- Neurodegenerative DiseasesNeurobiology, Pathogenesis and Therapeutics, pp. 65 - 79Publisher: Cambridge University PressPrint publication year: 2005
References
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