deep pectoral myopathy turkey
All Rights Reserved. During the first Match Day celebration of its kind, the UCSF School of Medicine class of 2020 logged onto their computers the morning of Friday, March 20 to be greeted by a video from Catherine Lucey, MD, MACP, Executive Vice Dean and Vice Dean for Medical Education. Delayed walking or other motor functions; Weakness: Similar degrees in facial, appendicular, & axial muscles, Congenital presentations of adult dystrophies, Clinically distinctive congenital weakness syndromes, History of malignant hyperthermia in family, Membrane remodelling defects & Phosphoinositide phosphatases, Excitation-contraction coupling, Transverse-tubule & Sarcoplasmic reticulum Δ, Atrophy: Skeletal muscle protein synthesis & degradation, Central core families: Most linked to Ryanodine receptor mutations, Large deletions reported: Compound heterozygous, 54 of 106 RYR1 exons: Congenital lethal myopathy with atypical histopathologic features, Exon 91 to 98: Recessive late-onset core myopathy, Tissue-specific epigenetic silencing of maternal RYR1 allele: Recessive core myopathies, Some point mutations produce MH alone: Most in N-terminus region, Higher thresholds & Smaller contractures compared to other mutations, Gly341Arg: 5% to 6% of British & Irish families, Other: Gly248Arg; Arg552Trp; Arg614Leu; Val2168Met; Thr2206Met, Some mutations with Central core disease & MH, Arg163Cys; Ile403Met; Tyr522Ser; Arg2434His; Arg2454His, Cytoplasmic N terminus: Malignant hyperthermia phenotype mutations in this region, Central cytoplasmic region: Gene segment 6400-6700, Mutations often occur at CpG dinucleotide sequences on coding or anti-sense DNA strand, 3' Transmembrane domain (Exons 93-105): 30% of cases, But no clinical complications with exposure to MH triggering agents, 2 different mutations in codons 614 (Same as pig 615), 2163, 2454 & 2458, 1 Mutation in C-terminus: Severe phenotype, Dutch allele with 3 different mutations: Ile1571Val, Arg3366His, Tyr3933Cys, Compound heterozygous with Val4849Ile: MH + Myopathy with cores & rods, C-terminal 20% of molecule forms transmembrane Ca, N-terminal: Contains most ligand binding sites; Cytoplasmic domain, RYR1: Skeletal muscle; Purkinje cells; Gastric; B-lymphocytes, Structural: Foot structure bridges gap between sarcoplasmic reticulum & t-tubule in skeletal muscle, Provided by activation of sarcoplasmic reticulum Ca, Functionally coupled to changes in sarcolemmal membrane potential through, RyR1 opening: Induced by conformational changes in DHPR following membrane depolarization (Physical interaction), RyR2 activation in heart: Activation of L-type Ca, Adenine nucleotides & Cyclic ADPribose: Channel activation, Facilitate channel opening: Increase sensitivity of RyR to Ca, RyR blockers; Ruthenium red; Local anesthetics (Procaine; Tetracaine), Muscle A-kinase anchoring protein (mAKAP; AKAP6), Mutation effects on protein function: More MHS + CCD with, Greater Sensitivity of mutant RYR protein to agonists caffeine & halothane, C-terminus (14895T & other): Uncouple EC coupling, Central core congenital myopathy: Clinical features, Mutation hotspot: C-terminal exons 101�102, Variants: Central core syndromes & Other RyR disorders, Y4796C: C-terminal channel forming domain, Weakness: Non-progressive; Hypotonia; Walk at 2.5 years, Course: Still walking in 3rd & 4th decades, Muscle biopsy: Central cores; Rods in areas without cores, EMG: Myopathic; Small, short action potentials, Epidemiology: Common RYR1 Recessive syndrome, Especially in Bridge solenoid & Pore domains, General: More severe & earlier onset vs other RYR1 recessive syndromes, Onset ages: Median 1 year; Range = Antenatal to 66 years, Eye (50%): Ptosis; Ophthalmoplegia; More with severe disease, Irregular areas of myofibrillar disorganisation, Gomori trichrome: Red-purple granular deposition, Uneven oxidative stains: Clear center; Radial strands, ATPase stain: Reduced or Absent in center of fibers, Desmin, Myotilin, RYR1, DHPR & αB-crystallin: Central staining, May be more prominent with increasing age, Epidemiology: Algerian, Turkish & German families, RYR1 mutation: Homozygous; Missense; P3527S, Variable in families: Some patients with severe disability, Vital capacity variably reduced: 50% to 100% of normal, Hyperlaxity: Hand involvement; Other joints also involved; Patellar, Hip & Knee dislocations, Contractures: Some patients; Mild; Mainly at heels, MRI: Gluteus maximus & Quadriceps preferentially involved, Minicores or Cores: Larger than with SEPN1 mutations, Dominant: G4899E (Mother less severely affected), Others with stable weakness after prolonged respiratory support, Ultrastructure: Myofibrillar disorganization, Same mutation also found in dominant malignant hyperthermia family, Disease pattern overlaps with mild phenotype of, Common: C-terminal domain of RYR1; Pore forming segment, Mutations found in 40% of patients with CNMDU1, Endomysial connective tissue: Normal or Mild increase, Epidemiology: Samaritan Israeli family, inbred, Birth: Severe; Diffuse; Respiratory failure; Hypotonia, Adults: Mild proximal weakness in arms & legs, Hyperthermia with anesthesia: Mild in 1 patient, Core-like structures: In type I muscle fibers, Internal architecture: Irregular; Moth-eaten, RYR1 staining: Reduced; Irregular; Aggregates with Caveolin-3, Genetics: Missense mutation Arg 4893Trp; Heterozygous, RYR1 mutations: Heterozygous; Arg3539His, c.10627-2A>G splice site, Malignant hyperthermia testing: Positive in 1 patient, Muscle imaging: Lumbar paraspinal & Posterior thigh abnormal, Missense: Some previously associated with, Occasional features: Heat intolerance; Cold-induced muscle stiffness, Internal architecture: Irregular or Cores, Mutations: Arg2241X nonsense, Leu2963Pro missense, Muscle ultrasound: Echogenicity increased, Muscles: Biceps, Semi-membranosus, Vasti & Adductors, Common geographic region: South Africa, South America, Mutations: Compound heterozygote; Missense > Splice, Frameshift, Especially: Biceps; Quadriceps; Hip abductors, Face: Myopathic facies; Inverted V-shaped mouth, Maximal motor function: Sitting or Walking, Respiratory: Ventilator dependent; Frequent respiratory infections, Spine: Scoliosis (30%); Rigid spine (30%), Course: Slow improvement or Non-progressive, Involvement of: Vastus lateralis, Adductor magnus, Biceps brachii, Nuclei: Central (20% to 90% of fibers); Internal, often multiple, Cores & Mini-cores: May develop with increasing age, Ultrastructure: Z-line streaming; Core-like irregularities, Mutation types: Misense & Stop; None with 2 stop mutations, Mutation number: 2 or 3 in 3 patients; Single (Heterozygous) in 1 patient (Arg1043His mutation), Mutations: Asp708Asn, Arg2241X, Arg2939Lys; Gln70X, Arg109Trp, Met485Val; Arg1507Gln, Gly2446Ser, Avoid anesthesia-related malignant hyperthermia, CK may be high in some asymptomatic carriers (G341R), In vitro contracture test for malignant hyperthermia, Clinical correlation: Similar patterns with different clinical syndromes & RYR1 mutations, Involvement: Vasti, Sartorius, Adductor magnus, Spared: Rectus, Gracilis, Adductor longus, Involvement: Soleus, Gastrocnemius, Peronei, Internal nuclei: Especially in older patients, Cores: Internal zone, "core", in muscle fiber, Some cores also have loss of central myofibrillar structure, Most prominent on NADH & mitochondrial stains, Similar patterns of immunoreactivity seen in targets, Other sarcoplasmic reticulum proteins: Calsequestrin, SERCA1/2 &, T-tubule protein: Dihydropyridine receptor-α1-subunit, SelN mutation-related minicores: Normal distribution of Ca, ATPase stain: Marked type I muscle fiber predominence, Well formed cores + Marked type 1 predominance, RYR1 mutations: 90% with 60% in C-terminus, Variable cores + Less type 1 predominance + Internal nuclei, Catecholaminergic polymorphic ventricular tachycardia (CPVT), Inheritance: Dominant, Recessive & Sporadic, Mutant proteins: Usually structural member of, Mutations in same spectrum of genes also produce, Early onset cases: Respiratory failure & Feeding difficulties common, Bulbar dysfunction: Common; Dysphagia (60%); Especially, CNS: Cognitive involvement in younger onset patients, General: Rarely symptomatic after neonatal period, Mildly reduced joint motion: 75%; May be progressive, Scoliosis: 70%; Often progressive in late 1st decade, Morbidity from respiratory infections & feeding problems less with increasing age, Early increased with: Respiratory insufficiency; Arthrogryposis; Failure to achieve early motor milestones, CK: Normal (90%) or ± Elevated in adult-onset forms, EMG: Myopathic or Neuropathic (Especially severe cases), Myopathy: Tend to cluster under sarcolemma & around nuclei, Differential diagnosis: Cytoplasmic bodies, Type I more frequent than II: Milder disease; Increasing age, Rod formation 2° to contractile dysfunction, Infrequent cause of nemaline rod myopathy, Mutation hotspot: Arg168 (Arg168His, Arg168Cys, Arg168Gly), Muscle: Expressed in type I muscle fibers, 11 different forms: Expressed in many tissues including brain, Component of sarcomeric thin filament troponin-tropomyosin complex, Predominantly expressed in type 1 (slow twitch) muscle fibers, Regulates: Muscle contraction; Binding of myosin head to actin filament, TPM3 Mutations: Missense; Met9Arg, Arg167His, Development: Motor delay in some patients, Proximal weakness: Later in disease course, Progression: Slow; Wheelchair often by 40 years, TPM3 Mutation: Homozygous; Stop at codon 31, Motor development: Extremely delayed and impaired, Mutations: X285Ser; Splice site at skeletal muscle-specific translational stop signal, Mutated protein: contains 57 additional amino acids, Type 1 fibers: At least 50% smaller than type 2, Locations: Leu100Met, Arg168Cys, Arg168Gly, Arg168His, Lys169Glu, Glu174Ala, Arg245Gly, Arg168Cys mutation: May be associated with CFTD & nemaline myopathy pathology in same family, Nocturnal noninvasive ventilation: Onset 3 to 55 years, Improvement in strength & function over time, Young children: Hypotonic stance; Exaggerated lumbar lordosis & thoracic kyphosis, Late childhood or adulthood: Mild-to-severe kyphoscoliosis with neck extensor contractures, Single fiber EMG: Abnormal jitter without blocking, Interstitial connective tissue: Mildly increased, Size: Large; 160% of normal; Range 110% to 220%, Internal nuclei: In older patients; Up to 25% of type 2 fibers, Coexpression: Some muscle fibers express both fast & slow myosin, No rods: Even with ultrastructure evaluation, Weakness: Mild, Walking unsupported; Respiratory, Dysmorphic: Elongated face; High-arched palate, Mutations: Glutamic acid deletions; ΔE218, ΔE224, Muscle fibers: Maximal active tension reduced, Excitation-contraction coupling: Excessively sensitized, Stiffness: Gait & Passive movement; Increased with heat, EMG: Myopathy + Denervation; No spontaneous activity, Muscle ultrasound: Increased echogenicity, Ultrastructure: Z-band streamning of mini-rods, Congenital stiffness: Differential diagnosis, Most common form of recessive "Typical" nemaline rod myopathy, Missense variants: Common; Conserved actin- & tropomyosin-binding sites likely pathogenic, 2,502-bp deletion in exon 55 & parts of introns 54 and 55, Severity: "Typical" forms of nemaline myopathy, Small insertions, deletions or point mutations, Eight exons repeated 3 times in 32-kb triplicate, 3' end of gene: Exons 165 to 185; Z-disc part of nebulin, ~100 kb in-frame deletion spanning NEB exons 14-89, Results in expression of smaller nebulin protein, Allelic disorders: Severe congenital, or Intermediate (mild) forms of Rod myopathy, Nebulin mutations NOT identified in: Adult onset rod myopathy, Missense mutations: May cause myofilament structural changes, Clinical: Infantile onset; Mild to moderate severity ("Typical"), May improve after initial respirator dependance, Type 2 muscle fibers: Reduced numbers in milder disease, 2X myosin: Absent in younger patients with more severe disease, Co-expression of fast & slow myosin: Intermeditate disease severity, Myofibrillar dissociation & smallness: Severe disease, Contain: α-actinin; myotilin, telethonin, actin, tropomyosin & desmin, Present in normal-sized & small muscle fibers, Milder disease: Elongated; Subsarcolemmal & Cytoplasmic; More common, Rectus femoris, Vastus lateralis, Hamstring, Anterior leg, Soleus, g.195187_195188dupAC in exon 140: Loss of all nebulin isoforms, g.234878_234881dupTCAA in exon 171: Loss of some nebulin isoforms, Muscle Pathology: Muscle fibers with rods & cores, MRI: Abnormal soleus & Anterior + Lateral compartments; Gastrocnemius spared, Epidemiology: 1 Finnish family, 3 patients, Mutation: ~100 kb in-frame deletion involving NEB exons 14-89, Mutation results in expression of smaller nebulin, Hands: Wrists & Fingers (Extensors weaker than flexors), Dysmorphism: High-arched palate; Narrow face, Face: Hypertelorism; Downslanting palpebral fissures, Long philtrum, Low set ears, Some involve known functional domains of actin, Normal adults: Present in muscle but not heart, Development: Becomes predominant isoform in muscle at 3rd trimester of gestation, Dominant syndromes: Mutant ACTA1 exerts dominant negative effect, Leptomycin B (a specific inhibitor of nuclear export mediated by leucine-rich nuclear export signals), Mutation in leucine-rich nuclear export signals, MRI: Gluteal & Anterolateral thigh involvement, Fiber size: Varied; Small fibers in clusters, Nemaline rods: Cytoplasmic & Intranuclear, Weakness: Asymmetric; Proximal & Distal; Respiratory, Other mutations: Met132Val; Val163Met; Met269Arg, No relation between abundance & disease severity, May be present in some muscles but not others, Truncation mutations identified; 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Oregon Disease - Deep Pectoral Myopathy; Ornithobacterium Infection, ORT; Osteomyelitis Complex, Turkey; Osteoporosis, Cage Fatigue; P. Paramyxovirus 2 - Yucaipa Disease; Paramyxovirus-3; ... Turkey Coryza; Turkey Rhinotracheitis (Adult) Turkey Rhinotracheitis (in rear) Turkey … Online Dictionaries: Definition of Options|Tips Options|Tips ©2000 ‐ 2021 ‐ Global Ag Media. Corona) muscle fibers (1 family), Nuclei: Internal; Around internal pale regions, Mitochondria: Clustered at fiber pedriphery, Premature termination, Splicing & Missense mutations, Allelic disorder: Thyroid hormone metabolism, abnormal (THMA), Function: Translational incorporation of Selenocysteine during selenoprotein synthesis, Interaction of a stemloop RNA structure with a multiprotein complex, which includes SECISBP2, Leads to Selenocysteine incorporation mediated by selenocysteyl-transfer RNA (tRNA[Ser]Sec) at UGA codons, Markedly reduced, but not absent, production of seleoproteins, Azoospermia: Spermatogenic maturation arrest, Cutaneous photosensitivity: Enhanced UV-mediated oxidative damage, RBC & Total lymphocyte counts: Mild reduction, Reactive oxygen species, cellular: Increased, Common: 1 base pair cytosine in 5C-nucleotide stretch in exon 3, FK506-binding family of peptidyl-prolyl cis-trans isomerases (PPIases), Kyphoscoliosis: Progressive; May require surgery, Joints: Hypermobility, Large & Small joints, Skin: Hyperelastic; Soft; Follicular hyperkeratosis, Motor development: Delayed; Walking at 2 to 4 years, Weakness: Moderate; May progress in 5th decade; No respiratory failure, Some patients: Cleft palate; Bladder diverticulum; Tricuspid insufficiency, Ehlers-Danlos (VIA; VIB): Kyphoscoliotic form, Ehlers-Danlos syndromes: Other neuromuscular, Serum CK: Normal or Slightly high (60 to 300), EMG: Normal in early childhood; Myopathic later, Marked: Vastus lateralis, Rectus femorus, soleus, Mild: Hip flexors, Neck extensors, Shoulder girdle, Paraspinal, Ultrastructure: Myofibrillar rearrangements; Z-band streaming, Nosology: Pancreatic insufficiency & Bone marrow dysfunction, Mutations: Intronic (c.258+2T>C) & Missense (c.41A>G, p.Asn14Ser), Catalyst in translational activation at ribosomal level, Hematology: Intermittent leukopenia & thrombocytopenia, Frequent embryonic & fetal MyHC in fibers, Intermyofibrillar network: Reduced in some fibers, Fibers with disrupted sarcomeric structure & thick Z-discs, Nosology: Centronuclear myopathy 6 (CNM6), Allelic disorder: Split-foot malformation with mesoaxial polydactyly (Phe368Cys missense & Inframe deletion), ZAK isoform 2 (MRK-beta): Preferentially activates p38γ/ERK6 pathway via MKK3/MKK6, Signal transduction molecule: MAPKKK family, Muscle size: Thigh atrophy; Calf hypertrophy (50%), Internal architecture: Irregular; Subsarcolemmal mitochondria, Endomysial connective tissue: Increased or Normal, Mutations: Homozygous; Missense (c.488Tgt;G; p.Met163Arg), Splice (c.479-2A>G), Small fibers: Express Fast & Fetal myosin; Cardiac α-actin, Desmin, NCAM.