Loss of Myelin Basic Protein Function Triggers Myelin Breakdown in Models of Demyelinating Diseases. 2016

Marie-Theres Weil, and Wiebke Möbius, and Anne Winkler, and Torben Ruhwedel, and Claudia Wrzos, and Elisa Romanelli, and Jeffrey L Bennett, and Lukas Enz, and Norbert Goebels, and Klaus-Armin Nave, and Martin Kerschensteiner, and Nicole Schaeren-Wiemers, and Christine Stadelmann, and Mikael Simons
Max Planck Institute of Experimental Medicine, 37075 Göttingen, Germany.

Breakdown of myelin sheaths is a pathological hallmark of several autoimmune diseases of the nervous system. We employed autoantibody-mediated animal models of demyelinating diseases, including a rat model of neuromyelitis optica (NMO), to target myelin and found that myelin lamellae are broken down into vesicular structures at the innermost region of the myelin sheath. We demonstrated that myelin basic proteins (MBP), which form a polymer in between the myelin membrane layers, are targeted in these models. Elevation of intracellular Ca(2+) levels resulted in MBP network disassembly and myelin vesiculation. We propose that the aberrant phase transition of MBP molecules from their cohesive to soluble and non-adhesive state is a mechanism triggering myelin breakdown in NMO and possibly in other demyelinating diseases.

UI MeSH Term Description Entries
D009186 Myelin Sheath The lipid-rich sheath surrounding AXONS in both the CENTRAL NERVOUS SYSTEMS and PERIPHERAL NERVOUS SYSTEM. The myelin sheath is an electrical insulator and allows faster and more energetically efficient conduction of impulses. The sheath is formed by the cell membranes of glial cells (SCHWANN CELLS in the peripheral and OLIGODENDROGLIA in the central nervous system). Deterioration of the sheath in DEMYELINATING DISEASES is a serious clinical problem. Myelin,Myelin Sheaths,Sheath, Myelin,Sheaths, Myelin
D009471 Neuromyelitis Optica A syndrome characterized by acute OPTIC NEURITIS; MYELITIS, TRANSVERSE; demyelinating and/or necrotizing lesions in the OPTIC NERVES and SPINAL CORD; and presence of specific autoantibodies to AQUAPORIN 4. Devic Disease,Devic's Neuromyelitis Optica,Devic Neuromyelitis Optica,Devic Syndrome,Devic's Disease,Devic's Syndrome,NMO Spectrum Disorder,Neuromyelitis Optica (NMO) Spectrum Disorder,Neuromyelitis Optica (NMO) Spectrum Disorders,Neuromyelitis Optica Spectrum Disorder,Neuromyelitis Optica Spectrum Disorders,Devic Neuromyelitis Opticas,Devics Disease,Devics Neuromyelitis Optica,Devics Syndrome,Disease, Devic,Disease, Devic's,NMO Spectrum Disorders,Neuromyelitis Optica, Devic,Neuromyelitis Optica, Devic's,Neuromyelitis Opticas, Devic,Syndrome, Devic,Syndrome, Devic's
D011917 Rats, Inbred Lew An inbred strain of rat that is used in BIOMEDICAL RESEARCH. Rats, Inbred Lewis,Rats, Lew,Inbred Lew Rat,Inbred Lew Rats,Inbred Lewis Rats,Lew Rat,Lew Rat, Inbred,Lew Rats,Lew Rats, Inbred,Lewis Rats, Inbred,Rat, Inbred Lew,Rat, Lew
D004195 Disease Models, Animal Naturally-occurring or experimentally-induced animal diseases with pathological processes analogous to human diseases. Animal Disease Model,Animal Disease Models,Disease Model, Animal
D004676 Myelin Basic Protein An abundant cytosolic protein that plays a critical role in the structure of multilamellar myelin. Myelin basic protein binds to the cytosolic sides of myelin cell membranes and causes a tight adhesion between opposing cell membranes. Golli-MBP1 Protein,Golli-MBP2 Protein,HOG5 Protein,HOG7 Protein,MBP1 Protein,MBP2 Protein,MBP3 Protein,MBP4 Protein,Myelin Basic Protein, 17.2 kDa Isoform,Myelin Basic Protein, 18.5 kDa Isoform,Myelin Basic Protein, 20.2 kDa Isoform,Myelin Basic Protein, 21.5 kDa Isoform,Myelin Basic Protein, Isoform 1,Myelin Basic Protein, Isoform 2,Myelin Basic Protein, Isoform 3,Myelin Basic Protein, Isoform 4,Myelin Basic Protein, Isoform 5,Myelin Basic Protein, Isoform 6,Myelin Basic Protein, Isoform 7,Golli MBP1 Protein,Golli MBP2 Protein
D000818 Animals Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA. Animal,Metazoa,Animalia
D020013 Calcium Signaling Signal transduction mechanisms whereby calcium mobilization (from outside the cell or from intracellular storage pools) to the cytoplasm is triggered by external stimuli. Calcium signals are often seen to propagate as waves, oscillations, spikes, sparks, or puffs. The calcium acts as an intracellular messenger by activating calcium-responsive proteins. Calcium Oscillations,Calcium Waves,Calcium Puffs,Calcium Sparks,Calcium Spikes,Calcium Oscillation,Calcium Puff,Calcium Signalings,Calcium Spark,Calcium Spike,Calcium Wave,Oscillation, Calcium,Oscillations, Calcium,Puff, Calcium,Puffs, Calcium,Signaling, Calcium,Signalings, Calcium,Spark, Calcium,Sparks, Calcium,Spike, Calcium,Spikes, Calcium,Wave, Calcium,Waves, Calcium

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