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Pyruvate kinase M2 isoform deletion in cone photoreceptors results in age-related cone degeneration.

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The tumor form of pyruvate kinase M2 has been suggested to promote cellular anabolism by redirecting the metabolism to cause accumulation of glycolytic intermediates and increasing flux through the pentose phosphate pathway, which is a metabolic pathway parallel to glycolysis. Both rod and cone

Pyruvate kinase: diagnostic value in neuromuscular disease.

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Pyruvate kinase activity was examined in the sera of a group of patients with neuromuscular disease and in carriers, and compared with that of creatine kinase. The following observations were made: 1. Pyruvate kinase activity was elevated in all 14 patients with Duchenne muscular dystrophy, with

Progressive Purkinje cell degeneration in tambaleante mutant mice is a consequence of a missense mutation in HERC1 E3 ubiquitin ligase.

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The HERC gene family encodes proteins with two characteristic domains: HECT and RCC1-like. Proteins with HECT domains have been described to function as ubiquitin ligases, and those that contain RCC1-like domains have been reported to function as GTPases regulators. These two activities are

Opening/blocking actions of pyruvate kinase antibodies on neuronal and muscular KATP channels.

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ATP-sensitive-K(+) (KATP) channels couple metabolism to the electrical activity of the cells. This channel is associated with glycolytic enzymes to form complexes regulating the channel activity in various tissues. The pyruvate-kinase (PK) enzyme is an antigen in the Paediatric Autoimmune

Sirtuin 3 deficiency accelerates Angiotensin II-induced skeletal muscle atrophy.

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Background: It has been reported that Angiotensin II (Ang II) induced skeletal muscle atrophy. However, the precise mechanisms remain elusive. Sirtuin 3 (SIRT3), an NAD-dependent deacetylase, plays a central role in maintaining cellular metabolic homeostasis. This work aims to determine the

Moya moya syndrome in a child with pyruvate kinase deficiency and combined prothrombotic factors.

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A 13-year-old Greek girl with pyruvate kinase deficiency and moya moya angiographic pattern is reported. She also had raised serum lipoprotein (a) concentration and was homozygous for the C677T mutation of the methylenetetrahydrofolate reductase gene. She presented with neonatal onset of anemia,

Opposite pathobiochemical fate of pyruvate kinase and adenylate kinase in aged rat skeletal muscle as revealed by proteomic DIGE analysis.

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Sarcopenia is the drastic loss of skeletal muscle mass and strength during ageing. In order to better understand the molecular pathogenesis of age-related muscle wasting, we have performed a DIGE analysis of young adult versus old rat skeletal muscle. Proteomic profiling revealed that out of 2493

Plasma activity of pyruvate kinase and glutamic oxalacetic transaminase as indices of myopathy in the vitamin E deficient rat.

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Weanling rats were fed vitamin E deficient diets for 6 to 15 weeks and then given vitamin E orally for 4 days. Plasma obtained 1 day after the last dose was assayed for glutamic oxalacetic transaminase (GOT) and pyruvate kinase activity (PK). Administration of vitamin E resulted in reduction in

Endothelial pyruvate kinase M2 maintains vascular integrity.

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The M2 isoform of pyruvate kinase (PKM2) is highly expressed in most cancer cells, and has been studied extensively as a driver of oncogenic metabolism. In contrast, the role of PKM2 in nontransformed cells is little studied, and nearly nothing is known of its role, if any, in quiescent cells. We

Acteoside improves muscle atrophy and motor function by inducing new myokine secretion in chronic spinal cord injury.

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Chronic spinal cord injury (SCI) is difficult to cure, even by several approaches effective at the acute or subacute phase. We focused on skeletal muscle atrophy as a detrimental factor in chronic SCI and explored drugs that protect against muscle atrophy and activate secretion of axonal growth

Knockdown of pyruvate kinase type M2 suppresses tumor survival and invasion in osteosarcoma cells both in vitro and in vivo.

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Osteosarcoma (OS) is the mostly diagnosed primary bone malignancy. Emerging evidence indicates that the activity of pyruvate kinase M2 (PKM2) isoform is crucial for the survival of tumor cells. In the present study, the effect of PKM2 knockdown on the proliferation and migration of OS cells were

Aerobic Glycolysis Hypothesis Through WNT/Beta-Catenin Pathway in Exudative Age-Related Macular Degeneration.

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Exudative age-related macular degeneration (AMD) is characterized by molecular mechanisms responsible for the initiation of choroidal neovascularization (CNV). Inflammatory processes are associated with upregulation of the canonical WNT/beta-catenin pathway in exudative AMD. We focus this review on

Cloning of the pyruvate kinase gene (pyk) of Corynebacterium glutamicum and site-specific inactivation of pyk in a lysine-producing Corynebacterium lactofermentum strain.

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The pyruvate kinase gene pyk from Corynebacterium glutamicum was cloned by applying a combination of PCR, site-specific mutagenesis, and complementation. A 126-bp DNA fragment central to the C. glutamicum pyk gene was amplified from genomic DNA by PCR with degenerate oligonucleotides as primers. The

Pyruvate kinase M2 regulates photoreceptor structure, function, and viability.

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Pyruvate kinase M2 (PKM2) is a glycolytic enzyme that is expressed in cancer cells. Its role in tumor metabolism is not definitively established, but investigators have suggested that regulation of PKM2 activity can cause accumulation of glycolytic intermediates and increase flux through the pentose

Oxidative damage compromises energy metabolism in the axonal degeneration mouse model of X-adrenoleukodystrophy.

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OBJECTIVE Chronic metabolic impairment and oxidative stress are associated with the pathogenesis of axonal dysfunction in a growing number of neurodegenerative conditions. To investigate the intertwining of both noxious factors, we have chosen the mouse model of adrenoleukodystrophy (X-ALD), which

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