Publications by authors named "Rodrigo Mendonca"

Background:  Spinal muscular atrophy linked to chromosome 5q (SMA-5q) is a neurodegenerative disorder caused by mutations in the gene.

Objective:  To describe the key demographic, clinical and genetic characteristics, as well as natural history data of patients with SMA-5q.

Methods:  Up to January 2022, 706 patients with confirmed genetic diagnosis of SMA-5q, or their parents, completed a self-reported questionnaire on natural history, genetic characteristics, drug treatments, and multidisciplinary care.

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In recent years, significant progress has been made in 5q Spinal Muscular Atrophy therapeutics, emphasizing the importance of early diagnosis and intervention for better clinical outcomes. Characterized by spinal cord motor neuron degeneration, 5q-SMA leads to muscle weakness, swallowing difficulties, respiratory insufficiency, and skeletal deformities. Recognizing the pre-symptomatic phases supported by screening and confirmatory genetic tests is crucial for early diagnosis.

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Article Synopsis
  • Spinal muscular atrophy (SMA) is a severe neuromuscular disorder leading to muscle weakness and reduced life expectancy, with onasemnogene abeparvovec being the first approved gene therapy for it.
  • A study involving 41 SMA patients (mostly type 1) showed significant motor function improvement after gene therapy, with nearly half of the type 1 patients gaining the ability to sit independently.
  • Adverse effects were common, including liver enzyme elevation in 70.7% of patients and thrombocytopenia in 31.7%, while the presence of previous nusinersen treatment didn't further enhance motor function post-gene therapy.
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  • Inflammatory myopathy with mitochondrial pathology (IM-Mito) is a rare condition that may be a variant of Inclusion Body Myositis (IBM), with limited previous radiological studies.
  • This study aimed to compare whole-body muscle MRI features in 14 IM-Mito patients and 10 IBM patients, assessing differences in muscle abnormalities.
  • Findings indicated that both conditions showed similar imaging patterns, but differences, particularly in how the muscles were affected, leave uncertainty about whether IM-Mito and IBM are distinct or related diseases.
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 To cross-culturally validate the Health Mindset Scale for Brazil, as well as adapt the terms and questionnaires for adequate understanding of Brazilians, using factor analysis as an instrument to validate its reliability.  Cross-cultural validation of the Health Mindset Scale into Brazilian Portuguese using the Beaton method, Cronbach's alpha calculation and factor analysis  The sample consisted of 215 patients aged between 18 and 87 years (M = 41.98; SD = 15.

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Spinal muscular atrophy linked to chromosome 5 (SMA-5q) is an autosomal recessive genetic disease caused by mutations in the . SMA-5q is characterized by progressive degeneration of the spinal cord and bulbar motor neurons, causing severe motor and respiratory impairment with reduced survival, especially in its more severe clinical forms. In recent years, highly effective disease-modifying therapies have emerged, either acting by regulating the splicing of exon 7 of the gene or adding a copy of the gene through gene therapy, providing a drastic change in the natural history of the disease.

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Unlabelled: Scoliosis is a pathology with multiple etiologies that leads to aesthetic changes, increased morbidity and, especially, psychological damage.

Objective: This work aims to compare two mindset types (fixed and growth) and assess levels of quality of life in individuals with scoliosis.

Methods: Two questionnaires, Scoliosis Research Society-30 (SRS-30) and Early-Onset Scoliosis-24 Questionnaire (EOSQ-24), associated with the "Health Mindset Scale," were used.

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Background: Assessing the quality of life (QOL) of children with early onset scoliosis (EOS) has been discussed recently. Therefore, the study aimed to apply and correlate the 24-item Early Onset Scoliosis Questionnaire (EOSQ-24) with the 50-item Childhood Health Questionnaire (CHQ-PF50) to find predictive factors impacting QOL.

Methods: Cross-sectional study involving a population of caregivers of patients with EOS.

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Objective: We investigated ultrasound patterns of muscle involvement in different types of spinal muscular atrophy (SMA) and their correlation with functional status to determine the pattern of muscle compromise in patients with SMA and the potential role of ultrasound to evaluate disease progression.

Methods: We examined muscles (biceps brachii, rectus femoris, diaphragm, intercostals and thoracic multifidus) of 41 patients with SMA (types 1 to 4) and 46 healthy age- and sex-matched control individuals using B-mode ultrasound for gray-scale analysis (GSA), area (biceps brachii and rectus femoris) and diaphragm thickening ratio. Functional scales were applied to patients only.

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Hemoplasmas are non-cultivable bacterial parasites of erythrocytes that infect domestic and wild animals, as well as humans. Their means of transmission and pathogenesis remain contentious issues and difficult to evaluate in wild animals. Procyon cancrivorus is a South American carnivore and occurs in all Brazilian biomes.

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Article Synopsis
  • Monogenic neuromuscular disorders can potentially be treated with gene therapy using viral vectors to restore protein function or silence harmful genes.
  • Spinal Muscular Atrophy (SMA) serves as a key example, with an AAV9-based gene therapy called AVXS-101 already approved for treatment.
  • The review will cover different types of viral vectors, their mechanisms, and the clinical trials that led to the approval of gene therapy for SMA and other treatable neuromuscular diseases.
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Background: The COVID-19 pandemic has brought substantial challenges for current practices in treating hereditary neuromuscular disorders (hNMDs). However, this infection has not been the only concern for these patients. Social distancing has compromised multidisciplinary assistance and physical activity, and has brought about several mental health issues.

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Desmin (DES) is the main intermediate muscle filament that connects myofibrils individually and with the nucleus, sarcolemma, and organelles. Pathogenic variants of DES cause desminopathy, a disorder affecting the heart and skeletal muscles. We aimed to analyze the clinical features, morphology, and distribution of desmin aggregates in skeletal muscle biopsies of patients with desminopathy and to correlate these findings with the type and location of disease-causing DES variants.

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A 34-year-old man presented with a history of 21-days of gait unsteadiness and diplopia. Ten days before presentation, he developed limb weakness and in the last three days reduced consciousness. HIV infection was diagnosed three months ago (CD4+ = 160 cells/mm; viral load HIV-1 = 144.

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Objective: To gather all systematic reviews of surgical treatment of degenerative cervical diseases and assess their quality, conclusions and outcomes.

Methods: A literature search for systematic reviews of surgical treatment of degenerative cervical diseases was conducted. Studies should have at least one surgical procedure as an intervention.

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Spinal muscular atrophy (SMA) is a motor neuron disease associated with progressive muscle weakness and motor disability. The motor unit number index (MUNIX) is a biomarker used to assess loss of motor units in later-onset SMA patients. Twenty SMA patients (SMA types 3 and 4), aged between 7 and 41 years, were clinically evaluated through the Hammersmith Motor Functional Scale Expanded and the Spinal Muscular Atrophy-Functional Rating Scale.

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Background: Spinal muscular atrophy (SMA) is a neurodegenerative disease of lower motor neurons associated with frequent occurrence of spinal deformity. Nusinersen is an antisense oligonucleotide that increases SMN protein level and is administrated by frequent intrathecal lumbar injections. Thus, spinal deformities and previous spinal surgery are important challenges for drug delivery in SMA.

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BackgroundSpinal muscular atrophy (SMA) is a motor neuron disease associated with progressive muscle weakness and motor disability.ObjectiveThis study aims to report the evaluation of nusinersen, an antisense oligonucleotide, on motor function in patients with SMA types 2 and 3.MethodsThis single-center retrospective observational study assessed nusinersen therapy outcomes, measured by HSMFSE or CHOP-INTEND scales, in patients with SMA types 2 and 3, compared to untreated patients, for at least 24 months.

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Article Synopsis
  • The study aimed to analyze the genetic variations in the survival motor neuron 1 (SMN1) gene among Brazilian patients with spinal muscular atrophy (SMA) and to connect these variants with disease severity.
  • Out of 450 patients, the majority (89.3%) had a common deletion in exon 7, while others had a mix of this deletion and additional point mutations, with certain variants being more prevalent in compound heterozygous cases.
  • The research concluded that specific variants (c.460C>T and c.5C>G) were linked to milder disease forms, and that the copy number of the gene did not consistently predict disease severity among these patients.*
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Myasthenia gravis (MG), an autoimmune neuromuscular disorder, may be a risk factor for severe COVID-19. We conducted an observational retrospective study with 15 consecutive adult MG patients admitted with COVID-19 at four hospitals in São Paulo, Brazil. Most patients with MG hospitalized for COVID-19 had severe courses of the disease: 87% were admitted in the intensive care unit, 73% needed mechanical ventilation, and 30% died.

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Background: More than one-third of COVID-19 patients present neurological symptoms ranging from anosmia to stroke and encephalopathy. Furthermore, pre-existing neurological conditions may require special treatment and may be associated with worse outcomes. Notwithstanding, the role of neurologists in COVID-19 is probably underrecognized.

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Study Design: Multicenter prospective study.

Objectives: To validate the Early-Onset Scoliosis 24 Questionnaire (EOSQ-24) questionnaire for the Brazilian Portuguese language, a widely used tool for assessing the impact of different treatments and interventions in EOS patients.

Methods: The EOSQ-24 questionnaire was cross-culturally adapted following guidelines already published.

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