Abstract
Multiple sclerosis (MS) is a chronic disease resulting from targeted destruction of central nervous system (CNS) myelin. MS is suggested to be an autoimmune disease involving the pathogenic activation of CD4+ T cells by a foreign antigen in the peripheral blood. The activated CD4+ T cells liberate inflammatory cytokines that facilitate the breakdown of the blood-brain barrier (BBB) promoting their passage into the CNS. Inside the CNS, CD4+ T cells become re-activated by myelin proteins sharing a similar structure to the foreign antigen that initially triggered the immune response. The CD4+ T cells continue to liberate inflammatory cytokines, such as tumor necrosis factor α (TNFα), which activates macrophages and antibodies responsible for the phagocytosis of myelin. Acute CNS lesions can be re-myelinated, however, the repair of chronic demyelinating lesions is limited, leading to permanent neurological deficits. Although current MS treatments reduce severity and slow disease progression, they do not directly repair damaged myelin. Henceforth, recent treatment strategies have focused on neurotrophins, such as nerve growth factor (NGF) for myelin repair. NGF promotes axonal regeneration, survival, protection and differentiation of oligodendrocytes (OGs) and facilitates migration and proliferation of oligodendrocyte precursors (OPs) to the sites of myelin damage. NGF also directly regulates key structural proteins that comprise myelin. Interestingly, NGF also induces the production of brain-derived neurotrophic factor (BDNF), another integral neurotrophin involved in myelination. The intricate signaling between neurotrophins and cytokines that governs myelin repair supports the role of NGF as a leading therapeutic candidate in white matter disorders, such as MS.
Keywords: Cytokines, multiple sclerosis, myelin, nerve growth factor, neurotrophins, oligodendrocytes, re-myelination.
CNS & Neurological Disorders - Drug Targets
Title:Exploring the Role of Nerve Growth Factor in Multiple Sclerosis: Implications in Myelin Repair
Volume: 12 Issue: 8
Author(s): C.M.R. Acosta, C. Cortes, H. MacPhee and M.P. Namaka
Affiliation:
Keywords: Cytokines, multiple sclerosis, myelin, nerve growth factor, neurotrophins, oligodendrocytes, re-myelination.
Abstract: Multiple sclerosis (MS) is a chronic disease resulting from targeted destruction of central nervous system (CNS) myelin. MS is suggested to be an autoimmune disease involving the pathogenic activation of CD4+ T cells by a foreign antigen in the peripheral blood. The activated CD4+ T cells liberate inflammatory cytokines that facilitate the breakdown of the blood-brain barrier (BBB) promoting their passage into the CNS. Inside the CNS, CD4+ T cells become re-activated by myelin proteins sharing a similar structure to the foreign antigen that initially triggered the immune response. The CD4+ T cells continue to liberate inflammatory cytokines, such as tumor necrosis factor α (TNFα), which activates macrophages and antibodies responsible for the phagocytosis of myelin. Acute CNS lesions can be re-myelinated, however, the repair of chronic demyelinating lesions is limited, leading to permanent neurological deficits. Although current MS treatments reduce severity and slow disease progression, they do not directly repair damaged myelin. Henceforth, recent treatment strategies have focused on neurotrophins, such as nerve growth factor (NGF) for myelin repair. NGF promotes axonal regeneration, survival, protection and differentiation of oligodendrocytes (OGs) and facilitates migration and proliferation of oligodendrocyte precursors (OPs) to the sites of myelin damage. NGF also directly regulates key structural proteins that comprise myelin. Interestingly, NGF also induces the production of brain-derived neurotrophic factor (BDNF), another integral neurotrophin involved in myelination. The intricate signaling between neurotrophins and cytokines that governs myelin repair supports the role of NGF as a leading therapeutic candidate in white matter disorders, such as MS.
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Acosta C.M.R., Cortes C., MacPhee H. and Namaka M.P., Exploring the Role of Nerve Growth Factor in Multiple Sclerosis: Implications in Myelin Repair, CNS & Neurological Disorders - Drug Targets 2013; 12 (8) . https://dx.doi.org/10.2174/18715273113129990087
DOI https://dx.doi.org/10.2174/18715273113129990087 |
Print ISSN 1871-5273 |
Publisher Name Bentham Science Publisher |
Online ISSN 1996-3181 |
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