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inflammation and muscle weakness

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https://www.readbyqxmd.com/read/28523201/sarcoidosis-is-it-a-possible-trigger-of-inclusion-body-myositis
#1
Ali Zakaria, Issam Turk, Kenneth Leung, Ana Capatina-Rata, Waseem Farra
Sarcoidosis is a multisystem disorder of unknown etiology, characterized pathologically by the presence of nonnecrotizing granulomatous inflammation in affected organs. Although skeletal muscle is involved in 50-80 percent of individuals with sarcoidosis, symptomatic myopathy has been shown to be a rare manifestation of the disease. Inclusion body myositis (IBM) is a rare acquired idiopathic inflammatory myopathy with the insidious onset of asymmetric and distal muscle weakness that characteristically involves the quadriceps, tibialis anterior, and forearm flexors...
2017: Case Reports in Rheumatology
https://www.readbyqxmd.com/read/28502777/peripheral-muscle-fatigue-in-hospitalised-geriatric-patients-is-associated-with-circulating-markers-of-inflammation
#2
Pauline Arnold, Rose Njemini, Stijn Vantieghem, Jacques Duchateau, Tony Mets, Ingo Beyer, Ivan Bautmans
Geriatric patients with acute infection show increased muscle weakness and fatigability but the relative contribution of central and peripheral factors is unclear. Hospitalised patients with acute infection (82±6years, N=10) and community-dwelling controls (76±6years, N=19) sustained a maximal voluntary isometric contraction of the M. Adductor Pollicis until strength dropped to 50% of its maximal value. Voluntary muscle activation (VA) was assessed before and at the end of the fatigue protocol using twitch interpolation method and muscle activity was monitored using surface electromyography...
May 10, 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28490364/sporadic-late-onset-nemaline-myopathy-clinico-pathological-characteristics-and-review-of-76-cases
#3
REVIEW
Lukas J Schnitzler, Tobias Schreckenbach, Aleksandra Nadaj-Pakleza, Werner Stenzel, Elisabeth J Rushing, Philip Van Damme, Andreas Ferbert, Susanne Petri, Christian Hartmann, Antje Bornemann, Andreas Meisel, Jens A Petersen, Thomas Tousseyn, Dietmar R Thal, Jens Reimann, Peter De Jonghe, Jean-Jacques Martin, Peter Y Van den Bergh, Jörg B Schulz, Joachim Weis, Kristl G Claeys
BACKGROUND: Sporadic late-onset nemaline myopathy (SLONM) is a rare, late-onset muscle disorder, characterized by the presence of nemaline rods in muscle fibers. Phenotypic characterization in a large cohort and a comprehensive overview of SLONM are lacking. METHODS: We studied the clinico-pathological features, treatment and outcome in a large cohort of 76 patients with SLONM, comprising 10 new patients and 66 cases derived from a literature meta-analysis (PubMed, 1966-2016), and compared these with 15 reported HIV-associated nemaline myopathy (HIV-NM) cases...
May 11, 2017: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/28473041/diagnosis-and-management-of-immune-mediated-myopathies
#4
REVIEW
Margherita Milone
Immune-mediated myopathies (IMMs) are a heterogeneous group of acquired muscle disorders characterized by muscle weakness, elevated creatine kinase levels, and myopathic electromyographic findings. Most IMMs feature the presence of inflammatory infiltrates in muscle. However, the inflammatory exudate may be absent. Indeed, necrotizing autoimmune myopathy (NAM), also called immune-mediated necrotizing myopathy, is characterized by a necrotizing pathologic process with no or minimal inflammation in muscle. The recent discovery of antibodies associated with specific subtypes of autoimmune myopathies has played a major role in characterizing these diseases...
May 2017: Mayo Clinic Proceedings
https://www.readbyqxmd.com/read/28462114/age-related-functional-changes-and-susceptibility-to-eccentric-contraction-induced-damage-in-skeletal-muscle-cell
#5
REVIEW
Seung-Jun Choi
Depending upon external loading conditions, skeletal muscles can either shorten, lengthen, or remain at a fixed length as they produce force. Fixed-end or isometric contractions stabilize joints and allow muscles to act as active struts during locomotion. Active muscles dissipate energy when they are lengthened by an external force that exceeds their current force producing capacity. These unaccustomed eccentric activities often lead to muscle weakness, soreness, and inflammation. During aging, the ability to produce force under these conditions is reduced and appears to be due to not only reductions in muscle mass but also to alterations in the basic mechanisms of contraction...
September 2016: Integr Med Res
https://www.readbyqxmd.com/read/28456665/a-novel-paradigm-links-mitochondrial-dysfunction-with-muscle-stem-cell-impairment-in-sepsis
#6
REVIEW
Laurent Chatre, Franck Verdonk, Pierre Rocheteau, Clément Crochemore, Fabrice Chrétien, Miria Ricchetti
Sepsis is an acute systemic inflammatory response of the body to microbial infection and a life threatening condition associated with multiple organ failure. Survivors may display long-term disability with muscle weakness that remains poorly understood. Recent data suggest that long-term myopathy in sepsis survivors is due to failure of skeletal muscle stem cells (satellite cells) to regenerate the muscle. Satellite cells impairment in the acute phase of sepsis is linked to unusual mitochondrial dysfunctions, characterized by a dramatic reduction of the mitochondrial mass and hyperactivity of residual organelles...
April 26, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28439995/scleromyxoedema-in-a-dog
#7
Aurore F Laprais, Petra Bizikova, Erin W Lashnits, Alison Tucker, Keith E Linder
BACKGROUND: In humans, scleromyxoedema is a chronic progressive skin condition traditionally characterized by deposits of mucin, increased number of fibroblasts and fibrosis in the skin, and by systemic disease. Thyroid disease is typically absent. A monoclonal gammopathy is usually present, as are other comorbidities. Descriptions of scleromyxoedema in the veterinary literature are limited to a single feline case. One dog, previously reported as having papular mucinosis, exhibited features that matched the more current diagnostic criteria of scleromyxoedema...
April 24, 2017: Veterinary Dermatology
https://www.readbyqxmd.com/read/28427790/exercise-and-ckd-skeletal-muscle-dysfunction-and-practical-application-of-exercise-to-prevent-and-treat-physical-impairments-in-ckd
#8
Baback Roshanravan, Jorge Gamboa, Kenneth Wilund
Patients with chronic kidney disease experience substantial loss of muscle mass, weakness, and poor physical performance. As kidney disease progresses, skeletal muscle dysfunction forms a common pathway for mobility limitation, loss of functional independence, and vulnerability to disease complications. Screening for those at high risk for mobility disability by self-reported and objective measures of function is an essential first step in developing an interdisciplinary approach to treatment that includes rehabilitative therapies and counseling on physical activity...
April 18, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28422672/aiimds-an-integrated-framework-of-automatic-idiopathic-inflammatory-myopathy-diagnosis-for-muscle
#9
Manish Sapkota, Fujun Liu, Yuanpu Xie, Hai Su, Fuyong Xing, Lin Yang
Idiopathic Inflammatory Myopathy (IIM) is a common skeletal muscle disease that relates to weakness and inflammation of muscle. Early diagnosis and prognosis of different types of IIMs will guide the effective treatment. Interpretation of digitized images of the cross section muscle biopsy, which is currently done manually, provides the most reliable diagnostic information. With the increasing volume of images, the management and manual interpretation of the digitized muscle images suffer from low efficiency and high interobserver variabilities...
April 13, 2017: IEEE Journal of Biomedical and Health Informatics
https://www.readbyqxmd.com/read/28414677/a-rare-case-of-tropical-pyomysitis-acquired-on-vacation-in-a-healthy-male
#10
K Poole, T Tran
INTRODUCTION: Pyomyositis has traditionally been considered a tropical disease. Increasing prevalence has been observed in more northern climates, especially with HIV, immunosuppression, and IV drug abuse as predisposing factors. Pyomyositis has the tendency to mimic other conditions, such as muscle contusion, necrotizing fasciitis, or septic arthritis. The rarity of this disease and non-specificity of its symptoms often lead to delay in appropriate diagnosis and treatment. CASE: 24-year-old man, seen 2 days prior in orthopedics clinic and the Emergency Department for persistent gluteal pain thought to be due to right-sided sciatica, was admitted following worsening pain, diffuse generalized weakness with polyarthralgias and myalgias These symptoms were associated with night sweats, shaking chills, and difficulty walking...
March 2017: Journal of the Louisiana State Medical Society: Official Organ of the Louisiana State Medical Society
https://www.readbyqxmd.com/read/28400989/serum-leptin-concentration-is-associated-with-incident-frailty-in-older-adults
#11
Alberto Lana, Ana Valdés-Bécares, Antonio Buño, Fernando Rodríguez-Artalejo, Esther Lopez-Garcia
Obesity has been associated with higher risk of frailty in older adults, but the pathophysiological mechanisms are unclear. No previous study has examined the association between leptin, an adipokine, and the risk of frailty in older adults, and whether this association could be explained by insulin resistance or chronic inflammation. Data were taken from 1,573 individuals without diabetes mellitus, aged ≥60 years, from the Seniors-ENRICA cohort. In 2008-2010, leptin, the homeostasis model assessment of insulin resistance (HOMA-IR) and C-reactive protein (CRP) were measured...
April 2017: Aging and Disease
https://www.readbyqxmd.com/read/28388378/protein-turnover-and-metabolism-in-the-elderly-intensive-care-unit-patient
#12
Stuart M Phillips, Roland N Dickerson, Frederick A Moore, Douglas Paddon-Jones, Peter J M Weijs
Many intensive care unit (ICU) patients do not achieve target protein intakes particularly in the early days following admittance. This period of iatrogenic protein undernutrition contributes to a rapid loss of lean, in particular muscle, mass in the ICU. The loss of muscle in older (aged >60 years) patients in the ICU may be particularly rapid due to a perfect storm of increased catabolic factors, including systemic inflammation, disuse, protein malnutrition, and reduced anabolic stimuli. This loss of muscle mass has marked consequences...
April 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28350642/increased-early-systemic-inflammation-in-icu-acquired-weakness-a-prospective-observational-cohort-study
#13
Esther Witteveen, Luuk Wieske, Tom van der Poll, Marike van der Schaaf, Ivo N van Schaik, Marcus J Schultz, Camiel Verhamme, Janneke Horn
OBJECTIVES: To investigate whether patients who develop ICU-acquired weakness have a different pattern of systemic inflammatory markers compared with critically ill patients who do not develop ICU-acquired weakness. DESIGN: Prospective observational cohort study. SETTING: Mixed medical-surgical ICU of a tertiary care hospital in the Netherlands. PATIENTS: Newly admitted critically ill patients, greater than or equal to 48 hours on mechanical ventilation with a nonneurologic ICU admission diagnosis, were included...
June 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28340105/morin-stain-detects-aluminum-containing-macrophages-in-macrophagic-myofasciitis-and-vaccination-granuloma-with-high-sensitivity-and-specificity
#14
Rati Chkheidze, Dennis K Burns, Charles L White, Diana Castro, Julie Fuller, Chunyu Cai
Macrophagic myofasciitis (MMF) is an inflammatory condition associated with the intramuscular (i.m.) injection of aluminum adjuvant-containing vaccines. It is clinically characterized by myalgia, weakness, and chronic fatigue and histologically by aggregates of cohesive macrophages with abundant basophilic, periodic acid-Schiff (PAS)-positive, diastase-resistant granules that percolate through the peri- and endomysium without eliciting substantial myofiber damage. The definitive diagnosis of MMF requires demonstration of aluminum within these macrophages...
April 1, 2017: Journal of Neuropathology and Experimental Neurology
https://www.readbyqxmd.com/read/28315275/sigma-1-receptor-in-motoneuron-disease
#15
Renzo Mancuso, Xavier Navarro
Amyotrophic Lateral Sclerosis (ALS ) is a neurodegenerative disease affecting spinal cord and brain motoneurons , leading to paralysis and early death. Multiple etiopathogenic mechanisms appear to contribute in the development of ALS , including glutamate excitotoxicity, oxidative stress , protein misfolding, mitochondrial defects, impaired axonal transport, inflammation and glial cell alterations. The Sigma-1 receptor is highly expressed in motoneurons of the spinal cord, particularly enriched in the endoplasmic reticulum (ER) at postsynaptic cisternae of cholinergic C-terminals...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28294976/vitamins-and-microelement-bioavailability-in-different-stages-of-chronic-kidney-disease
#16
REVIEW
Magdalena Jankowska, Bolesław Rutkowski, Alicja Dębska-Ślizień
Chronic kidney disease (CKD) predisposes one to either deficiency or toxic excess of different micronutrients. The knowledge on micronutrients-specifically water-soluble vitamins and trace elements-in CKD is very limited. Consequently, current guidelines and recommendations are mostly based on expert opinions or poor-quality evidence. Abnormalities of micronutrient resources in CKD develop for several reasons. Dietary restrictions and anorexia lead to an insufficient micronutrient intake, while diuretics use and renal replacement therapy lead to their excessive losses...
March 15, 2017: Nutrients
https://www.readbyqxmd.com/read/28284832/prolonged-inhibition-of-inflammation-in-osteoarthritis-by-triamcinolone-acetonide-released-from-a-polyester-amide-microsphere-platform
#17
Imke Rudnik-Jansen, Sascha Colen, Julien Berard, Saskia Plomp, Ivo Que, Mattie van Rijen, Nina Woike, Annelies Egas, Gerjo van Osch, Erik van Maarseveen, Ken Messier, Alan Chan, Jens Thies, Laura Creemers
Controlled biomaterial-based corticosteroid release might circumvent multiple injections and the accompanying risks, such as hormone imbalance and muscle weakness, in osteoarthritic (OA) patients. For this purpose, microspheres were prepared from an amino acid-based polyester amide (PEA) platform and loaded with triamcinolone acetonide (TAA). TAA loaded microspheres were shown to release TAA for over 60days in PBS. Furthermore, the bioactivity lasted at least 28days, demonstrated by a 80-95% inhibition of PGE2 production using TNFα-stimulated chondrocyte culture, indicating inhibition of inflammation...
March 9, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28283597/overlapping-features-of-polymyositis-and-inclusion-body-myositis-in-hiv-infected-patients
#18
Thomas E Lloyd, Iago Pinal-Fernandez, E Harlan Michelle, Lisa Christopher-Stine, Katherine Pak, Ned Sacktor, Andrew L Mammen
OBJECTIVE: To characterize patients with myositis with HIV infection. METHODS: All HIV-positive patients with myositis seen at the Johns Hopkins Myositis Center from 2003 to 2013 were included in this case series. Muscle biopsy features, weakness pattern, serum creatine kinase (CK) level, and anti-nucleotidase 1A (NT5C1A) status of HIV-positive patients with myositis were assessed. RESULTS: Eleven of 1,562 (0.7%) patients with myositis were HIV-positive...
April 11, 2017: Neurology
https://www.readbyqxmd.com/read/28277343/statin-associated-autoimmune-myopathy-a-systematic-review-of-100-cases
#19
Salik Nazir, Saroj Lohani, Niranjan Tachamo, Dilliram Poudel, Anthony Donato
BACKGROUND: Statins are a group of drugs that reduce the levels of triglycerides and cholesterol in blood by inhibiting HMG-CoA reductase, an enzyme involved in rate limiting step in cholesterol synthesis. About 2-20% patients on statins develop toxic myopathies, which usually resolve on discontinuation of statin. More recently, an immune-mediated necrotizing myopathy has been found to be associated with statin use which in most cases requires treatment with immunosuppressants. OBJECTIVE: To perform a systematic review on published case reports and case series of statin-associated autoimmune myopathy...
April 2017: Journal of Clinical Rheumatology: Practical Reports on Rheumatic & Musculoskeletal Diseases
https://www.readbyqxmd.com/read/28262570/peripheral-muscle-abnormalities-in-cystic-fibrosis-etiology-clinical-implications-and-response-to-therapeutic-interventions
#20
Mathieu Gruet, Thierry Troosters, Samuel Verges
Peripheral muscle dysfunction is an important systemic consequence of cystic fibrosis (CF) with major clinical implications, such as exercise intolerance and reduced quality of life. Evidence is now accumulating that lack of physical activity is unlikely to be the sole explanation for peripheral muscle dysfunction of patients with CF. Particularly, the demonstration of CFTR expression in both murine and human skeletal muscle suggests the potential implication of intrinsic CF-related factors. By combining data from both human and animal models, this review describes CF peripheral muscle abnormalities and critically reviews the advances in understanding the impact of the underlying mechanisms...
March 2, 2017: Journal of Cystic Fibrosis: Official Journal of the European Cystic Fibrosis Society
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