calsequestrin/atrofija

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Diltiazem and verapamil protect dystrophin-deficient muscle fibers of MDX mice from degeneration: a potential role in calcium buffering and sarcolemmal stability.

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Ielogoties Reģistrēties

The lack of dystrophin in mdx mice and in Duchenne muscular dystrophy causes sarcolemmal breakdown and increased calcium influx followed by myonecrosis. We examined whether the calcium channel blockers diltiazem and verapamil protect dystrophic muscles from degeneration. Mdx mice received daily

Effect of feed restriction timing on live performance, breast myopathy occurrence, and muscle fiber degeneration in 2 broiler chicken genetic lines.

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Ielogoties Reģistrēties

During recent years, research on meat quality in poultry has aimed to evaluate the presence and consequences of breast myopathies as well as the factors which can affect their occurrence by modifying the growth rate. A total of 900 broiler chickens were reared until slaughter (48 D) to evaluate the

Lessons from calsequestrin-1 ablation in vivo: much more than a Ca(2+) buffer after all.

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Ielogoties Reģistrēties

Calsequestrin type-1 (CASQ1), the main sarcoplasmic reticulum (SR) Ca(2+) binding protein, plays a dual role in skeletal fibers: a) it provides a large pool of rapidly-releasable Ca(2+) during excitation-contraction (EC) coupling; and b) it modulates the activity of ryanodine receptors (RYRs), the

Expression of endoplasmic reticulum stress proteins during skeletal muscle disuse atrophy.

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Ielogoties Reģistrēties

Disuse atrophy of skeletal muscle leads to an upregulation of genes encoding sarcoplasmic reticulum (SR) calcium-handling proteins. Because many of the proteins that are induced with endoplasmic reticulum (ER) stress are ER calcium-handling proteins, we sought to determine whether soleus muscle

Ageing is associated with deterioration of calcium homeostasis in isolated human right atrial myocytes.

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Ielogoties Reģistrēties

OBJECTIVE Ageing-related cardiac disorders such as heart failure and atrial fibrillation often present with intracellular calcium homeostasis dysfunction. However, knowledge of the intrinsic effects of ageing on cellular calcium handling in the human heart is sparse. Therefore, this study aimed to

Elevated calmodulin levels and reduced calmodulin-stimulated calcium-ATPase in Duchenne progressive muscular dystrophy.

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Ielogoties Reģistrēties

We determined the calmodulin concentration and Ca2+-ATPase activity in subcellular fractions recovered from samples of vastus lateralis muscle obtained from 18 patients with Duchenne muscular dystrophy, 10 patients with other primary myopathies, 5 with spinal muscular atrophy, and 16 age-matched

Ageing, but not yet senescent, rats exhibit reduced muscle quality and sarcoplasmic reticulum function.

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Ielogoties Reģistrēties

OBJECTIVE Reduced muscle force greater than expected from loss of muscle mass has been reported in ageing muscles. Impaired sarcoplasmic reticulum (SR) Ca(2+) release has been implicated as a possible mechanism, and attributed to several factors, including loss of ryanodine receptor (RYR) expression

Proteins of muscle subcellular fractions in Duchenne progressive muscular dystrophy stained with "stains-all" cationic carbocyanine dye and with Coomassie Blue.

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Ielogoties Reģistrēties

The protein compositions of subcellular fractions of muscle obtained from 17 Duchenne dystrophy patients, 15 disease controls (10 different primary myopathies, 5 spinal muscular atrophy patients), and 10 normals were examined by polyacrylamide gel electrophoresis. The gels were stained with

Functional impact of an oculopharyngeal muscular dystrophy mutation in PABPN1.

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Ielogoties Reģistrēties

CONCLUSIONS Mutations in the gene encoding poly(A)-binding protein nuclear 1 (PABPN1) result in oculopharyngeal muscular dystrophy (OPMD). This disease is of late-onset, but the underlying mechanism is unclear. Ca2+ stimulates muscle growth and contraction and, because OPMD courses with muscle

Changing a limb muscle growth program into a resorption program.

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Ielogoties Reģistrēties

Transgenic Xenopus laevis tadpoles that express a dominant negative form of the thyroid hormone receptor (TRDN) controlled by the cardiac actin muscle promoter (pCar) develop with very little limb muscle. Under the control of the tetracycline system the transgene can be induced at will by adding

Effect of 23-day muscle disuse on sarcoplasmic reticulum Ca2+ properties and contractility in human type I and type II skeletal muscle fibers.

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Ielogoties Reģistrēties

Inactivity negatively impacts on skeletal muscle function mainly through muscle atrophy. However, recent evidence suggests that the quality of individual muscle fibers is also altered. This study examined the effects of 23 days of unilateral lower limb suspension (ULLS) on specific force and

Reinnervation-induced alterations in rat skeletal muscle.

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Ielogoties Reģistrēties

Denervation-induced myofiber atrophy can be reversed by reinnervation. Growing reinnervated myofibers upregulate numerous molecules, many of which determine the muscle fiber type. In the present study we aimed at identifying factors that might contribute specifically to myofiber growth after

Proteomic profiling of x-linked muscular dystrophy.

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Ielogoties Reģistrēties

Progressive x-linked muscular dystrophy represents the most commonly inherited neuromuscular disorder in humans. Although the disintegration of the dystrophin-associated glycoprotein complex triggers the initial pathogenesis of Duchenne muscular dystrophy, secondary alterations in metabolic

Effects of dietary omega-3 on dystrophic cardiac and diaphragm muscles as evaluated by 1H magnetic resonance spectroscopy: Metabolic profile and calcium-related proteins.

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Ielogoties Reģistrēties

OBJECTIVE Duchenne muscular dystrophy (DMD) is characterized by the absence of dystrophin and muscle degeneration. Calcium dysregulation and oxidative stress also contribute to the disease progression. We evaluated the potential therapeutic benefits of supplementation with omega-3 on the metabolic

Sarcoplasmic reticulum of human skeletal muscle: age-related changes and effect of training.

Rakstu tulkošanu var veikt tikai reģistrēti lietotāji

Ielogoties Reģistrēties

The effect of ageing on human skeletal muscle was investigated using needle biopsies from young and aged subjects and from aged subjects trained with different activity patterns. Histochemical staining for myofibrillar ATPase of ageing m. vastus lateralis demonstrated an unchanged fibre type

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