Examinando por Materia "Myasthenia gravis"

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    Chemosensory disturbances-associated nanocholinergic dysfunction : The case of, not only, myasthenia gravis
    (2015-09-01) Leon Sarmiento, Fidias E.; Leon-Ariza, Juan S.; Prada, Diddier G.; Leon-Ariza, Daniel S.
  • Publicación
    Acceso abierto
    Dysfunctional chemosensation in myasthenia gravis : A systematic review
    (2013-09) Leon Sarmiento, Fidias E.; Leon Ariza, Daniel S.; Doty, Richard L.
    Myasthenia gravis has traditionally been viewed as a disorder that solely affects the neuromuscular junction within the peripheral nervous system. However, there is now evidence that the cholinergic dysfunction of this disorder may be more widespread than previously believed. This article provides a systematic review of the studies that examined smell and taste function in myasthenia gravis. Methods: We analyzed studies that reported chemosensory function alterations in patients with myasthenia gravis. PubMed, MEDLINE, Web of Science, EMBASE, and SciELO, searched to identify articles published from January 1950 through December 2012, were supplemented by relevant articles. The following information was identified from each article: the number of patients, number of controls (if any), clinical stage of patients, neurological involvement, serological state, taste or smell involvement, chemosensory test used, and country of publication. Results: Ten studies reporting smell and taste function and dysfunction in patients with myasthenia gravis were identified, most of which were case reports commenting on apparent abnormalities in the taste system. The sole empirical study that investigated taste function, however, was negative, suggesting that some reports of taste loss may reflect olfactory loss. One study clearly documented olfactory dysfunction in patients with myasthenia gravis, dysfunction most likely attributable to altered central nervous system cholinergic function. Conclusions: Chemosensory dysfunction has been reported in a number of patients with myasthenia gravis. Given the close association between complaints of taste dysfunction and loss of flavor sensations secondary to olfactory system damage, quantitative testing should be used to accurately assess the nature and degree of the dysfunction present in this debilitating disorder.
  • Publicación
    Acceso abierto
    Sensory aspects in myasthenia gravis : A translational approach
    (2016-09-15) Leon-Sarmiento, Fidias E.; Leon-Ariza, Juan S.; Prada, Diddier G.; Leon-Ariza, Daniel S.; Rizzo Sierra, Carlos V.
    Myasthenia gravis is a paradigmatic muscle disorder characterized by abnormal fatigue and muscle weakness that worsens with activities and improves with rest. Clinical and research studies done on nicotinic acetylcholine receptors have advanced our knowledge of the muscle involvement in myasthenia. Current views still state that sensory deficits are not “features of myasthenia gravis”. This article discusses the gap that exists on sensory neural transmission in myasthenia that has remained after > 300 years of research in this neurological disorder. We outline the neurobiological characteristics of sensory and motor synapses, reinterpret the nanocholinergic commonalities that exist in both sensory and motor pathways, discuss the clinical findings on altered sensory pathways in myasthenia, and propose a novel way to score anomalies resulting from multineuronal inability associated sensory troubles due to eugenic nanocholinergic instability and autoimmunity. This medicine-based evidence could serve as a template to further identify novel targets for studying new medications that may offer a better therapeutic benefit in both sensory and motor dysfunction for patients. Importantly, this review may help to re-orient current practices in myasthenia.