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https://www.readbyqxmd.com/read/29044624/effect-of-chronic-alcohol-abuse-on-anabolic-and-catabolic-signaling-pathways-in-human-skeletal-muscle
#1
Boris S Shenkman, Svetlana P Belova, Olga E Zinovyeva, Nudlya D Samkhaeva, Timur M Mirzoev, Natalia A Vilchinskaya, Erzhena G Altaeva, Olga V Turtikova, Tatiana Y Kostrominova, Tatiana L Nemirovskaya
BACKGROUND: Animal studies showed that alcoholic myopathy is characterized by the reduction of myofiber cross sectional area (CSA) and by impaired anabolic signaling. The goal of the current study was to compare changes in CSA and fiber type composition with modifications in anabolic and catabolic signaling pathways at the early stages of alcohol misuse in humans. METHODS: Skeletal muscle samples from seven male patients with chronic alcohol abuse (AL; 47.7±2.0 years old; alcohol misuse duration 7...
October 16, 2017: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29043378/-neurogenic-myopathies-and-imaging-of-muscle-denervation
#2
REVIEW
M Wolf, C Wolf, M-A Weber
CLINICAL ISSUE: Neurogenic myopathies are primary diseases of the nervous system, which secondarily result in denervation of the target musculature. The spectrum of potential causes is manifold ranging from acute traumatic injuries and chronic compression to neurodegenerative, inflammatory, metabolic and neoplastic processes. STANDARD DIAGNOSTIC METHODS: The medical history, clinical neurological examination, and electrophysiological tests including electromyography and nerve conduction studies are crucial in diagnosing neuropathic myopathies...
October 17, 2017: Der Radiologe
https://www.readbyqxmd.com/read/29040646/statins-affect-skeletal-muscle-performance-evidence-for-disturbances-in-energy-metabolism
#3
Neeltje A E Allard, Tom J J Schirris, Rebecca J Verheggen, Frans G M Russel, Richard J Rodenburg, Jan A M Smeitink, Paul D Thompson, Maria T E Hopman, Silvie Timmers
Context: Statin myopathy is linked to disturbances in mitochondrial function and exercise intolerance. Objectives: To determine whether differences exist in exercise performance, muscle function and mitochondrial oxidative capacity and content between symptomatic and asymptomatic statin users, and non-statin using controls. Design: Cross-sectional study. Setting: Department of Physiology of the Radboud University Medical Center...
October 9, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29038020/the-ca-2-camkk2-axis-mediates-the-telbivudine-induces-upregulation-of-creatine-kinase-implications-for-mechanism-of-antiviral-nucleoside-analogs-side-effect
#4
Long Jianfei, Wang Min, Ma Chunlai, Chen Bicui, Zhang Jiming, Wang Bin
Telbivudine (LdT), a widely prescribed anti-hepatitis B virus (HBV) drug for the treatment of chronic Hepatitis B (CHB), causes adverse reactions ranging from creatine kinase (CK) elevation to myopathy. The purpose of this study was to explore the mechanism(s) of LdT induced CK elevation. The effects of LdT on mitochondrial morphology and proteins (TK2 and β-actin), oxidative stress, intracellular Ca(2+) levels, Ca(2+)-related signaling pathway (CaMKK2/AMPK), and Ca(2+)-related biomarkers such as superoxide dismutase (SOD) and malondialdehyde (MDA) were assessed in human skeletal muscle cells (HSKMCs)...
October 13, 2017: Biochemical Pharmacology
https://www.readbyqxmd.com/read/29037990/roles-for-the-vcp-co-factors-npl4-and-ufd1-in-neuronal-function-in-drosophila-melanogaster
#5
Dwayne J Byrne, Mark J Harmon, Jeremy C Simpson, Craig Blackstone, Niamh C O'Sullivan
The VCP-Ufd1-Npl4 complex regulates proteasomal processing within cells by delivering ubiquitinated proteins to the proteasome for degradation. Mutations in VCP are associated with two neurodegenerative diseases, amyotrophic lateral sclerosis (ALS) and inclusion body myopathy with Paget's disease of the bone and frontotemporal dementia (IBMPFD), and extensive study has revealed crucial functions of VCP within neurons. By contrast, little is known about the functions of Npl4 or Ufd1 in vivo. Using neuronal-specific knockdown of Npl4 or Ufd1 in Drosophila melanogaster, we infer that Npl4 contributes to microtubule organization within developing motor neurons...
September 21, 2017: Journal of Genetics and Genomics, Yi Chuan Xue Bao
https://www.readbyqxmd.com/read/29037825/vitamin-d-prevents-lipid-accumulation-in-murine-muscle-through-regulation-of-ppar%C3%AE-and-perilipin-2-expression
#6
Jiarong Li, Milton Mihalcioiu, Lifeng Li, Mahvash Zakikhani, Anne Camirand, Richard Kremer
Vitamin D plays an important role in regulation of skeletal muscle tone and contraction. Serum vitamin D status is linked to muscle power and force in adolescent girls, and vitamin D deficiency is associated with myopathies in children and poorer physical performance in the elderly. We previously reported that vitamin D deficiency is linked to a significant increase in muscle fatty infiltration in healthy young women, and studies in patients with neuromuscular disorders also associate muscle weakening and lipid content...
October 13, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29032119/a-systematic-review-of-safety-and-efficacy-of-systemic-corticosteroids-in-atopic-dermatitis
#7
Sherry Yu, Aaron M Drucker, Mark Lebwohl, Jonathan I Silverberg
BACKGROUND: Systemic corticosteroids are often used to treat atopic dermatitis (AD). However, few studies assessed the safety and efficacy of systemic corticosteroids in AD. OBJECTIVE: To systematically review the literature on efficacy and safety of systemic corticosteroid use (oral, intramuscular, intravenous) in AD. METHODS: PubMed, Embase, Medline, Scopus, Web of Science, and Cochrane Library were searched. We included systematic reviews, guidelines and treatment reviews of systemic corticosteroid use among patients of all ages with a diagnosis of AD (52 reviews and 12 studies)...
October 12, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/29030598/single-nucleotide-polymorphisms-in-the-ets1-gene-are-associated-with-idiopathic-inflammatory-myopathies-in-a-northern-chinese-han-population
#8
Si Chen, Xiaoting Wen, Liubing Li, Jing Li, Yuan Li, Qian Wang, Hui Yuan, Fengchun Zhang, Yongzhe Li
Single-nucleotide polymorphisms (SNPs) in the ETS1 gene are associated with several auto-inflammatory diseases. In this study, we determined whether ETS1 gene polymorphisms confer susceptibility to idiopathic inflammatory myopathies (IIMs) in a northern Chinese Han population. DNA samples were collected from 1017 IIM patients: 363 PM cases and 654 DM cases. The results were compared with those of 1280 healthy controls. Five SNPs in the ETS1 region (rs7117932, rs6590330, rs4937362, rs10893845 and rs1128334) were assessed and genotyped using the Sequenom platform...
October 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29029362/altered-tdp-43-dependent-splicing-in-hspb8-related-distal-hereditary-motor-neuropathy-and-myofibrillar-myopathy
#9
Andrea Cortese, Matilde Laurà, Carlo Casali, Ichizo Nishino, Yukiko K Hayashi, Stefania Magri, Franco Taroni, Cristiana Stuani, Paola Saveri, Maurizio Moggio, Michela Ripolone, A Prelle, C Pisciotta, A Sagnelli, Anna Pichiecchio, Mary M Reilly, Emanuele Buratti, Davide Pareyson
INTRODUCTION: Mutations in the small heat shock protein 22 gene (HSPB8) have been associated with Charcot-Marie-Tooth type 2L, distal hereditary motor neuropathy (dHMN) type IIa and, more recently, distal myopathy/myofibrillar myopathy (MFM) with protein aggregates and TDP-43 inclusions. OBJECTIVE: To report a novel family with HSPB8 (K141E) -related dHMN/MFM and to investigate, in a patient muscle biopsy, whether the presence of protein aggregates was paralleled by altered TDP-43 function...
October 13, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29027009/lipid-lowering-agent-triggered-dermatomyositis-and-polymyositis-a-case-series-and-literature-review
#10
REVIEW
Isabela Bruna Pires Borges, Marilda Guimarães Silva, Rafael Giovane Misse, Samuel Katsuyuki Shinjo
Lipid-lowering agent-triggered dermatomyositis (DM) or polymyositis (PM) is a rare event. Therefore, the aim of the present study was to describe a series of such cases. A retrospective cohort study of 5 DM and 4 PM cases triggered by prior exposure to lipid-lowering agents between 2001 and 2017 was carried out. All patients, except for two cases, had muscle biopsy compatible with inflammatory myopathy and no serum autoantibodies positive for anti-SRP or anti-HMGCoAR. Median age of the patients at time of diagnosis was 68 years...
October 12, 2017: Rheumatology International
https://www.readbyqxmd.com/read/29026613/a-case-of-generalized-argyria-presenting-with-muscle-weakness
#11
Inha Jung, Eun-Jeong Joo, Byung Seong Suh, Cheol-Bae Ham, Ji-Min Han, You-Gyung Kim, Joon-Sup Yeom, Ju-Yeon Choi, Ji-Hye Park
BACKGROUND: Argyria is a rare irreversible cutaneous pigmentation disorder caused by prolonged exposure to silver. Herein, we report a case of generalized argyria that developed after chronic ingestion of soluble silver-nano particles and presented with muscle weakness. CASE PRESENTATION: A 74-year-old woman visited our emergency room, complaining of fever and mental deterioration. She was diagnosed with acute pyelonephritis and recovered after antibiotic therapy...
2017: Annals of Occupational and Environmental Medicine
https://www.readbyqxmd.com/read/29022266/cardiac-aging-benefits-of-exercise-nrf2-activation-and-antioxidant-signaling
#12
Madhusudhanan Narasimhan, Namakkal-Soorappan Rajasekaran
Cardiovascular dysfunction and heart failure associated with aging not only impairs the cardiac function but also the quality of life eventually decreasing the life expectancy of the elderly. Notably, cardiac tissue can prematurely age under certain conditions such as genetic mutation, persistent redox stress and overload, aberrant molecular signaling, DNA damage, telomere attrition, and other pathological insults. While cardiovascular-related morbidity and mortality is on the rise and remains a global health threat, there has been only little to moderate improvements in its medical management...
2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29020356/a-common-missense-variant-of-lilrb5-is-associated-with-statin-intolerance-and-myalgia
#13
Moneeza K Siddiqui, Cyrielle Maroteau, Abirami Veluchamy, Aleksi Tornio, Roger Tavendale, Fiona Carr, Ngu-Uma Abelega, Dan Carr, Katyrzyna Bloch, Par Hallberg, Qun-Ying Yue, Ewan R Pearson, Helen M Colhoun, Andrew D Morris, Eleanor Dow, Jacob George, Munir Pirmohamed, Paul M Ridker, Alex S F Doney, Ana Alfirevic, Mia Wadelius, Anke-Hilse Maitland-van der Zee, Daniel I Chasman, Colin N A Palmer
Aims: A genetic variant in LILRB5 (leukocyte immunoglobulin-like receptor subfamily-B) (rs12975366: T > C: Asp247Gly) has been reported to be associated with lower creatine phosphokinase (CK) and lactate dehydrogenase (LDH) levels. Both biomarkers are released from injured muscle tissue, making this variant a potential candidate for susceptibility to muscle-related symptoms. We examined the association of this variant with statin intolerance ascertained from electronic medical records in the GoDARTS study...
August 29, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29019851/outcomes-of-icu-patients-with-a-discharge-diagnosis-of-critical-illness-polyneuromyopathy-a-propensity-matched-analysis
#14
Daniel A Kelmenson, Natalie Held, Richard R Allen, Dianna Quan, Ellen L Burnham, Brendan J Clark, P Michael Ho, Tyree H Kiser, R William Vandivier, Marc Moss
OBJECTIVES: To assess the impact of a discharge diagnosis of critical illness polyneuromyopathy on health-related outcomes in a large cohort of patients requiring ICU admission. DESIGN: Retrospective cohort with propensity score-matched analysis. SETTING: Analysis of a large multihospital database. PATIENTS: Adult ICU patients without preexisting neuromuscular abnormalities and a discharge diagnosis of critical illness polyneuropathy and/or myopathy along with adult ICU propensity-matched control patients...
October 10, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/29019063/statin-prescribing-in-the-elderly-special-considerations
#15
REVIEW
M Leya, N J Stone
PURPOSE OF REVIEW: Our aim was to examine the current evidence behind prescribing statins to individuals over 65 years of age with emphasis on those older than 75. Individuals over 75 years of age may often have multiple comorbidities and take many medications. Additionally, they are often underrepresented in randomized controlled trials (RCTs) of statins in older populations. While results of RCTs demonstrate the benefit of statin therapy in both primary and secondary prevention patients, clinicians must more carefully consider adverse effects and drug-drug interactions before prescribing statin therapy as well as determining the intensity in older individuals...
October 11, 2017: Current Atherosclerosis Reports
https://www.readbyqxmd.com/read/28994502/pro-protein-subtilisin-kexin-9-pcsk9-inhibition-in-practice-lipid-clinic-experience-in-2-contrasting-uk-centres
#16
Monika Kohli, Kinjal Patel, Zofia MacMahon, Radha Ramachandran, Martin A Crook, Timothy M Reynolds, Anthony S Wierzbicki
BACKGROUND: Prescribing criteria have been suggested for proprotein convertase subtilisin kexin-9 (PCSK-9) inhibitors but few studies exist of their real-world effectiveness. METHODS: This study audited PCSK-9 inhibitor therapy in 105 consecutive patients from two hospital centres-a university hospital (UH; n = 70) and a district general hospital (DGH; n = 35). Baseline characteristics including cardiovascular disease risk factors, NICE qualification criteria, efficacy and side effects were assessed...
October 10, 2017: International Journal of Clinical Practice
https://www.readbyqxmd.com/read/28994016/cardiopulmonary-manifestations-of-collagen-vascular-diseases
#17
REVIEW
Hamza Jawad, Sebastian R McWilliams, Sanjeev Bhalla
PURPOSE OF REVIEW: The study aimed to illustrate the cardiopulmonary findings of the following collagen vascular diseases on cross-sectional imaging: rheumatoid arthritis, scleroderma (progressive systemic sclerosis), systemic lupus erythematosus, the inflammatory myopathies (polymyositis/dermatomyositis), and Sjögren's syndrome. RECENT FINDINGS: Although collagen vascular diseases can affect any part of the body, interstitial lung disease and pulmonary hypertension are the two most important cardiopulmonary complications and are responsible for the majority of morbidity and mortality in this patient population...
October 9, 2017: Current Rheumatology Reports
https://www.readbyqxmd.com/read/28992167/muscle-involvement-in-systemic-sclerosis-points-to-consider-in-clinical-trials
#18
REVIEW
Ulrich A Walker, Philip J Clements, Yannick Allanore, Oliver Distler, Chester V Oddis, Dinesh Khanna, Daniel E Furst
SSc is clinically and pathogenetically heterogeneous. Consensus standards for trial design and outcome measures are needed. International experts experienced in SSc clinical trial design and a researcher experienced in systematic literature review screened the PubMed and Cochrane Central Register of Controlled Trials in order to develop points to consider when planning a clinical trial for muscle involvement in SSc. The experts conclude that SSc-associated muscle involvement is heterogeneous and lacks a universally accepted gold-standard for measuring therapeutic response...
September 1, 2017: Rheumatology
https://www.readbyqxmd.com/read/28988978/isolated-neck-extensor-myopathy-a-case-presentation-of-rapid-onset-and-spontaneous-recovery
#19
Anish Mirchandani, Allen Chen
Patients presenting with a chin-on-chest deformity, or dropped head syndrome (DHS), may have a diagnosis of isolated neck extensor myopathy (INEM). INEM is a diagnosis of exclusion occurring primarily in elderly patients. INEM usually has a benign progression, which may involve the shoulder girdle but does not advance to other muscle groups. Patients without an inflammatory etiology typically experience minimal or no recovery of their symptoms. Dropped head syndrome has various implications on a patient's quality of life and activities of daily living...
October 5, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28988574/alcoholic-myopathy-pathophysiologic-mechanisms-and-clinical-implications
#20
Liz Simon, Sarah E Jolley, Patricia E Molina
Skeletal muscle dysfunction (i.e., myopathy) is common in patients with alcohol use disorder. However, few clinical studies have elucidated the significance, mechanisms, and therapeutic options of alcohol-related myopathy. Preclinical studies indicate that alcohol adversely affects both anabolic and catabolic pathways of muscle-mass maintenance and that an increased proinflammatory and oxidative milieu in the skeletal muscle is the primary contributing factor leading to alcohol-related skeletal muscle dysfunction...
2017: Alcohol Research: Current Reviews
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