Publications by authors named "Elie Naddaf"

Article Synopsis
  • - The study investigates vasculitic myopathy, a rare manifestation of vasculitis, to characterize its clinical features, lab results, and treatment outcomes using a retrospective review of patient records from 1980 to 2022.
  • - Out of 25 identified patients, most presented with proximal weakness and pain, with 80% showing myopathy as the first sign of vasculitis; significant findings included inflammation in muscle biopsies and elevated blood markers in some cases.
  • - Key findings include high instances of perivascular inflammation in biopsies, with substantial destruction noted in vessel walls; a notable proportion of patients also displayed signs of peripheral neuropathy.
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Article Synopsis
  • Peripheral neuropathy in patients with excessive alcohol consumption is frequently misdiagnosed due to the lack of clear biomarkers and underlying biases against those with alcohol use disorder (AUD).
  • Various mechanisms, including nutrient deficiencies and oxidative stress, contribute to alcohol-related nerve toxicity, but symptoms often resemble those of chronic idiopathic neuropathy, complicating diagnosis.
  • The stigma surrounding AUD can harm patient care, as biases in healthcare may lead to inadequate treatment and social isolation, highlighting the need for increased awareness and better clinical practices.
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  • * The review aims to gather and assess existing MRI scoring systems to create an evidence-based foundation for a universal standardized system that can be used in both research and clinical settings.
  • * A systematic search of electronic databases will be conducted to consolidate information on MRI scanning protocols for evaluating muscle involvement in IIMs, with the goal of producing guidelines for consistent clinical and research practices.
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Background: Inclusion body myositis (IBM) is the most prevalent muscle disease in adults for which no current treatment exists. The pathogenesis of IBM remains poorly defined. Inflammation and mitochondrial dysfunction are the most common histopathological findings.

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Objectives: Autoantibodies targeting intracellular proteins are common in various autoimmune diseases. In the context of myositis, the pathologic significance of these autoantibodies has been questioned due to the assumption that autoantibodies cannot enter living muscle cells. This study aims to investigate the validity of this assumption.

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Since the publication of the 2013 European Neuromuscular Center (ENMC) diagnostic criteria for Inclusion Body Myositis (IBM), several advances have been made regarding IBM epidemiology, pathogenesis, diagnostic tools, and clinical trial readiness. Novel diagnostic tools include muscle imaging techniques such as MRI and ultrasound, and serological testing for cytosolic 5'-nucleotidase-1A antibodies. The 272nd ENMC workshop aimed to develop new diagnostic criteria, discuss clinical outcome measures and clinical trial readiness.

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Myositis International Health and Research Collaborative Alliance (MIHRA) is a newly formed purpose-built non-profit charitable research organization dedicated to accelerating international clinical trial readiness, global professional and lay education, career development and rare disease advocacy in IIM-related disorders. In its long form, the name expresses the community's scope of engagement and intent. In its abbreviation, MIHRA, conveys linguistic roots across many languages, that reflects the IIM community's spirit with meanings such as kindness, community, goodness, and peace.

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Inclusion body myositis (IBM) is a progressive, debilitating muscle disease commonly encountered in patients over the age of 50. IBM typically presents with asymmetric, painless, progressive weakness and atrophy of deep finger flexors and/or quadriceps muscle. Many patients with IBM develop dysphagia.

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Mitochondrial myopathies are frequently recognized in childhood as part of a broader multisystem disorder and often overlooked in adulthood. Herein, we describe the phenotypic and genotypic spectrum and long-term outcomes of mitochondrial myopathies diagnosed in adulthood, focusing on neuromuscular features, electrodiagnostic and myopathological findings and survival. We performed a retrospective chart review of adult patients diagnosed with mitochondrial myopathy at Mayo Clinic (2005-21).

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Article Synopsis
  • Myositis is an autoimmune muscle disease characterized by autoantibodies that target proteins within muscle cells, but their impact on disease development was previously unclear.* -
  • This study utilized confocal microscopy and bulk RNA sequencing on muscle biopsies to investigate the presence and effects of these autoantibodies, revealing they accumulate in muscle fibers and disrupt the normal function of their target proteins.* -
  • Findings showed that the internalization of these autoantibodies led to significant changes in gene expression and function, indicating that they play a crucial role in causing the pathology associated with myositis.*
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Impairment in cellular bioenergetics as either the cause, consequence, or major contributor of tissue damage has drawn increasing scientific curiosity across aging and chronic health conditions, with mitochondrial dysfunction emerging as a central mechanism in the pathogenesis of a variety of inflammatory and degenerative disorders. Beyond bioenergetics, mitochondria play critical regulatory roles in programmed cell death of dysfunctional/defective cells as well as in metabolite synthesis and metabolic signalling. Further, extra-cellular exposure to fragmentation of injured mitochondria is associated with incitement of systemic and organ-based inflammation.

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Purpose Of Review: This review provides an overview of the management and treatment landscape of inclusion body myositis (IBM), while highlighting the current challenges and future directions.

Recent Findings: IBM is a slowly progressive myopathy that predominantly affects patients over the age of 40, leading to increased morbidity and mortality. Unfortunately, a definitive cure for IBM remains elusive.

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Article Synopsis
  • Sporadic inclusion body myositis (IBM) is a type of muscle disease that affects daily functions like hand use and swallowing, and there are no approved treatments or standardized ways to measure treatment effects.
  • A review of clinical studies identified various outcome measures used to assess IBM, including the IBM-functional rating scale and muscle testing methods, but these are inconsistent across studies.
  • There is a significant need for a dedicated set of measurement tools for IBM to improve the evaluation of new therapies aimed at treating this condition.
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Background: Vasculitic neuropathies usually present acutely to subacutely, with an asymmetric pattern, involving multiple peripheral nerve territories. Drug-induced vasculitis is an often overlooked etiology of vasculitic neuropathy.

Methods: We present the first reported case of nitrofurantoin-associated and an illustrative case of minocycline-associated vasculitic neuropathy, with a review of the literature.

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Inclusion body myositis (IBM) is a progressive muscle disease affecting patients over the age of 40, with distinctive clinical and histopathological features. The typical clinical phenotype is characterized by prominent involvement of deep finger flexors and quadriceps muscles. Less common presentations include isolated dysphagia, asymptomatic hyper-CKemia, and axial or limb weakness beyond the typical pattern.

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Introductions/aims: Inclusion body myositis (IBM) typically presents with progressive weakness preferentially involving finger flexors and quadriceps. Atypical presentations have been less commonly reported. Here, we aim to describe the clinical characteristics and long-term outcomes of IBM patients with atypical presentations.

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Peripheral neuropathies are a recognized complication of labor in the post-partum period. Herein, we describe an uncommon presentation of sciatic mononeuropathy due to ischiofemoral impingement during labor. A 29-year-old, gravida 4 para 2, female presented post-partum with acute left lower limb paresthesia and left foot drop, following spontaneous vaginal delivery of twins.

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Background: LRP4 is a post-synaptic membrane protein that promotes acetylcholine (AChR) clustering on the crest of post-synaptic neuromuscular folds. Autoantibodies against LRP4 are suggested to account for myasthenia gravis (MG) patients negative for antibodies to AChR.

Objectives: To report a clinical experience with service-line LRP4-IgG cell-based testing in electrodiagnostically confirmed MG patients and controls.

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Objectives: To investigate immune-mediated necrotizing myopathy (IMNM) association with cancer and its clinical implications.

Methods: IMNM cases were identified 1 January 2000 to 31 December 2020 matching sex and age controls (4:1).

Results: A total of 152 patients with IMNM were identified and among serologically tested, 60% (83/140) were HMGCR-IgG+, 14% (20/140) were SRP-IgG+ and 26% (37/140) were seronegative.

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