glycosidase/atrofia

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Dose and duration related methylmercury deposition, glycosidases inhibition, myelin degeneration and chelation therapy.

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Methylmercury accumulation in different parts of the CNS (olfactory bulbs, cerebral hemispheres, cerebellum, medulla oblongata and spinal cord) in relation to the cytoarchitectural changes in myelin sheath as well as in glycosidases levels have been reported. Male albino rats were treated with low

Role of two glycosidases (alpha-mannosidase and beta-N-acetylglucosaminidase) on in vitro bovine embryonic development.

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Glycosidases are enzymes that might play a role in embryonic development. The aims of the present project were to evaluate if bovine in vitro produced embryos: (1) release beta-N-acetylglucosaminidase (beta-NAGASE) and alpha-mannosidase in culture medium and (2) to investigate if these glycosidases

Age-related changes of glycosidases in human retinal pigment epithelium.

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This study was undertaken to determine whether there are age-related changes in the specific activities of several glycosidases in fresh retinal pigment epithelial cells (RPE) isolated from the posterior pole of human donor eyes. One hundred and twenty-one pairs of eyes from human donors, between

Mechanisms of neurofibrillary degeneration and the formation of neurofibrillary tangles.

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Alzheimer disease (AD) has polyetiology. Independent of the etiology the disease is characterized histopathologically by the intraneuronal accumulation of paired helical filaments (PHF), forming neurofibrillary tangles, neuropil threads and dystrophic neurites surrounding the extracellular deposits

Phylogenetic distribution of genes encoding β-glucuronidase activity in human colonic bacteria and the impact of diet on faecal glycosidase activities.

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Bacterial β-glucuronidase in the human colon plays an important role in cleaving liver conjugates of dietary compounds and xenobiotics, while other glycosidase activities are involved in the conversion of dietary plant glycosides. Here we detected an increase in β-glucuronidase activity in faecal

Decreased ADAM17 expression in the lungs of α-Klotho reduced mouse.

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The deficiency of α-Klotho in mice causes phenotypes resembling human age-associated disorders at 3-4 weeks after birth and shows short lifespans of approximately 2 months. One of the crucial symptoms is pulmonary emphysema, although α-Klotho is not expressed in the lungs. α-Klotho secreted from the

S-opsin protein is incompletely modified during N-glycan processing in Rpe65(-/-) mice.

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Retinal pigment epithelium-specific protein 65 kDa (RPE65) is a key enzyme for the visual cycle in the eye. Rpe65(-/-) mice lack 11-cis-retinal, and show early cone degeneration and mislocalization of cone opsins. The present study investigated whether abnormal modification of cone opsins at the

Characterization of a novel oxidase from Thelonectria discophora SANK 18292 involved in nectrisine biosynthesis.

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A fungus, Thelonectria discophora SANK 18292 (JCM 30947), produces nectrisine that has a nitrogen-containing heterocyclic 5-membered ring acting as a glycosidase inhibitor. Our previous study showed the possibility that 4-amino-4-deoxyarabinitol was enzymatically converted to nectrisine but the

Rabbit small intestinal trehalase. Purification, cDNA cloning, expression, and verification of glycosylphosphatidylinositol anchoring.

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alpha,alpha-Trehalase (EC 3.2.1.28), an intrinsic protein of intestinal brush-border membranes, was purified to homogeneity from rabbits. Partial amino acid sequences were determined. Two degenerate oligonucleotides based on the sequence of a CNBr peptide were employed in a polymerase chain reaction

Estradiol induces and hyperglycosylates the receptor for ovine gonadotropin-releasing hormone.

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The crucial first link between GnRH and its pleiotropic stimulation of the reproductive system is its receptor (GnRHRec). In mammals, 17beta-estradiol is a major regulator of GnRH action, and part of its regulation occurs at the level of the GnRHRec. In ovine pituitary cultures, estradiol

Exhaustive physical exercise and acid hydrolase activity in mouse skeletal muscle. A histochemical study.

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Adult, untrained NMRI mice were exhausted on a motor-driven treadmill by an intermittent-type running programme. Serial cryostate sections for the staining of NADH-tetrazolium reductase, beta-glucuronidase, beta-N-acetylglucosaminidase, and beta-glycerophosphatase activities and for making

Identification of disialosyl paragloboside and O-acetyldisialosyl paragloboside in cerebellum and embryonic cerebrum.

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The lacto series of glycolipids are only minor constituents in mammalian CNS and are found mostly during development. Expression of a significant amount (70 micrograms of neuraminic acid/g dry weight) of disialosyl-lacto-N-neotetraosylceramide (LD1) in adult mouse cerebellum is reported for the

[Adult-onset neuronal ceroid lipofuscinosis--a case report with biological study].

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A 32-year-old male was admitted to our hospital complaining of dementia, gait disturbance and blindness. These symptoms developed at the early two decade and were progressive. On admission, his clinical features included dementia (IQ = 69), spasticity, accentuated deep tendon reflexes, ataxia and

Primary structure of the cytosolic beta-glucosidase of guinea pig liver.

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The cytosolic beta-glucosidase (EC 3.2.1.21) present in the livers of mammalian species is distinguished by its broad specificity for sugars and its preference for hydrophobic aglycones. We purified the cytosolic beta-glucosidase from guinea pig liver and sequenced 142 amino acid residues contained

A donor-age-dependent change in the activity of alpha-mannosidase in human cultured RPE cells.

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Six acidic glycosidase activities in cultured human retinal pigment epithelium (RPE) cells from donors of different ages (19 to 80 years) were studied with regard to pH optimum, Km, Vmax and specific activity. For alpha-mannosidase we found significant age-dependent decreases in specific activity

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