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Abstract:

Amyotrophic lateral sclerosis (ALS) is a fatal neurodegenerative disease characterized by a gradual loss of motoneurons. The majority of ALS cases are associated with a sporadic form whose etiology is unknown. Several pieces of evidence favor autoimmunity as a potential contributor to sporadic ALS pathology. To gain understanding concerning possible antigens interacting with IgGs from sporadic ALS patients (ALS-IgGs), we studied immunoreactivity against neuromuscular junction (NMJ), spinal cord and cerebellum of mice with and without the Ca V2.1 pore-forming subunit of the P/Q-type voltage-gated calcium (Ca 2+) channel. ALS-IgGs showed a strong reactivity against NMJs of wild-type diaphragms. ALS-IgGs also increased muscle miniature end-plate potential frequency, suggesting a functional role for ALS-IgGs on synaptic signaling. In support, in mice lacking the Ca V2.1 subunit ALS-IgGs showed significantly reduced NMJ immunoreactivity and did not alter spontaneous acetylcholine release. This difference in reactivity was absent when comparing N-type Ca 2+ channel wild-type or null mice. These results are particularly relevant because motoneurons are known to be early pathogenic targets in ALS. Our findings add further evidence supporting autoimmunity as one of the possible mechanisms contributing to ALS pathology. They also suggest that serum autoantibodies in a subset of ALS patients would interact with NMJ proteins down-regulated when P/Q-type channels are absent. © 2011 International Society for Neurochemistry.

Registro:

Documento: Artículo
Título:Amyotrophic lateral sclerosis-immunoglobulins selectively interact with neuromuscular junctions expressing P/Q-type calcium channels
Autor:Gonzalez, L.E.; Kotler, M.L.; Vattino, L.G.; Conti, E.; Reisin, R.C.; Mulatz, K.J.; Snutch, T.P.; Uchitel, O.D.
Filiación:Departamento de Fisiología, Biología Molecular y Celular, Facultad de Ciencias Exactas y Naturales, UBA, Argentina
Departamento de Química Biolõgica, Facultad de Ciencias Exactas y Naturales, UBA, Argentina
Servicio de Neurología, Hospital Británico, Argentina
Michael Smith Laboratories, University of British Columbia, Vancouver, Canada
Palabras clave:amyotrophic lateral sclerosis; autoantibodies; autoimmunity; calcium channels; autoantibody; calcium channel P type; calcium channel Q type; immunoglobulin G; voltage gated calcium channel; acetylcholine release; adult; aged; amyotrophic lateral sclerosis; animal cell; animal experiment; antibody labeling; article; autoimmunity; cerebellum; clinical article; controlled study; down regulation; embryo; endplate potential; female; human; human cell; immunofluorescence; immunoreactivity; male; motoneuron; mouse; neuromuscular synapse; nonhuman; priority journal; protein expression; protein protein interaction; signal transduction; spinal cord; synaptic potential; Aged; Amyotrophic Lateral Sclerosis; Analysis of Variance; Animals; Animals, Newborn; Bungarotoxins; Calcium Channels, N-Type; Cell Line, Transformed; Central Nervous System; Diaphragm; Female; Humans; Immunoglobulin G; Immunoprecipitation; Male; Mice; Mice, Inbred C57BL; Mice, Knockout; Middle Aged; Miniature Postsynaptic Potentials; Neuromuscular Junction; Synaptophysin; Transfection; Vesicle-Associated Membrane Protein 2; Mus
Año:2011
Volumen:119
Número:4
Página de inicio:826
Página de fin:838
DOI: http://dx.doi.org/10.1111/j.1471-4159.2011.07462.x
Título revista:Journal of Neurochemistry
Título revista abreviado:J. Neurochem.
ISSN:00223042
CODEN:JONRA
CAS:immunoglobulin G, 97794-27-9; Bungarotoxins; Cacna1b protein, mouse; Calcium Channels, N-Type; Immunoglobulin G; Synaptophysin; Vesicle-Associated Membrane Protein 2; vesicle-associated membrane protein 2, mouse; voltage-dependent calcium channel (P-Q type)
PDF:https://bibliotecadigital.exactas.uba.ar/download/paper/paper_00223042_v119_n4_p826_Gonzalez.pdf
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00223042_v119_n4_p826_Gonzalez

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Citas:

---------- APA ----------
Gonzalez, L.E., Kotler, M.L., Vattino, L.G., Conti, E., Reisin, R.C., Mulatz, K.J., Snutch, T.P.,..., Uchitel, O.D. (2011) . Amyotrophic lateral sclerosis-immunoglobulins selectively interact with neuromuscular junctions expressing P/Q-type calcium channels. Journal of Neurochemistry, 119(4), 826-838.
http://dx.doi.org/10.1111/j.1471-4159.2011.07462.x
---------- CHICAGO ----------
Gonzalez, L.E., Kotler, M.L., Vattino, L.G., Conti, E., Reisin, R.C., Mulatz, K.J., et al. "Amyotrophic lateral sclerosis-immunoglobulins selectively interact with neuromuscular junctions expressing P/Q-type calcium channels" . Journal of Neurochemistry 119, no. 4 (2011) : 826-838.
http://dx.doi.org/10.1111/j.1471-4159.2011.07462.x
---------- MLA ----------
Gonzalez, L.E., Kotler, M.L., Vattino, L.G., Conti, E., Reisin, R.C., Mulatz, K.J., et al. "Amyotrophic lateral sclerosis-immunoglobulins selectively interact with neuromuscular junctions expressing P/Q-type calcium channels" . Journal of Neurochemistry, vol. 119, no. 4, 2011, pp. 826-838.
http://dx.doi.org/10.1111/j.1471-4159.2011.07462.x
---------- VANCOUVER ----------
Gonzalez, L.E., Kotler, M.L., Vattino, L.G., Conti, E., Reisin, R.C., Mulatz, K.J., et al. Amyotrophic lateral sclerosis-immunoglobulins selectively interact with neuromuscular junctions expressing P/Q-type calcium channels. J. Neurochem. 2011;119(4):826-838.
http://dx.doi.org/10.1111/j.1471-4159.2011.07462.x