lysolecithin/atrofia

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Degeneration of non-myelinated axons in the rat sciatic nerve following lysolecithin injection.

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Lysolecithin has been used in many studies to induce demyelination in peripheral nerves. In the present investigation lysolecithin (lysophosphatidyl choline) was injected into rat sciatic nerves at a dose of 2-3 microns of a 10 mg/ml solution in order to study the effects of this lipid on cellular

Remyelination in the spinal cord of the cat following intraspinal injections of lysolecithin.

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Intraspinal injections of small volumes of lysolecithin were made in the cat. These produced a local area of primary demyelination at the site of injection and all the demyelinated axons were subsequently remyelinated either by oligodendrocytes or Schwann cells. In general the type of remyelination

Expression of NGF-receptors during immune-mediated and lysolecithin-induced demyelination of the peripheral nervous system.

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Nerve growth factor receptor, expressed in Schwann cells during early development of the PNS, is rarely found in the normal mature PNS. Following nerve transection nerve growth factor receptor is re-expressed at high levels in the Schwann cells of the denervated nerve fibres. In this study we asked

Injected nuclei in frog oocytes: fate, enlargement, and chromatin dispersal.

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A method is described by which nuclei associated with some cytoplasm can be rapidly prepared from a suspension of cells. The method involves the use of lysolecithin and bovine serum albumin. Oocytes of Xenopus laevis were injected with about 200 nuclei perpared from human HeLa cells by this method.

Oligodendrocyte PTEN is required for myelin and axonal integrity, not remyelination.

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OBJECTIVE Repair of myelin injury in multiple sclerosis may fail, resulting in chronic demyelination, axonal loss, and disease progression. As cellular pathways regulated by phosphatase and tensin homologue deleted on chromosome 10 (PTEN; eg, phosphatidylinositol-3-kinase [PI-3K]) have been reported

[Experimental study on the pathogenesis of pulmonary insufficiency in acute pancreatitis and changes in the pulmonary surfactant].

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Serious pulmonary complications are often associated with acute pancreatitis. The destruction of pulmonary surfactant by the action of pancreatic phospholipase A2 (PLA2), together with pulmonary edema, is considered an important etiopathogenic factor of acute respiratory insufficiency. This

In vivo visualization of focal demyelination in peripheral nerves by gadofluorine M-enhanced magnetic resonance imaging.

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Magnetic resonance imaging (MRI) allows assessment of axonal nerve lesions, but detection of focal demyelination is still difficult. We have recently shown that the novel micellar magnetic resonance (MR) contrast agent gadofluorine M (Gf) accumulates in nerve fibers undergoing Wallerian

The multimolecular cascade of spinal cord injury. Studies on prostanoids, calcium, and proteinases.

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Experimental spinal cord injury in animals induced by weight drop produces neurological deficit and paralysis. Correlation of the progressive morphological changes in the lesion by both light and electron microscopy with the biochemical alterations revealed ischemia, edema, hemorrhage, tissue

Resident brain neural precursor cells develop age-dependent loss of therapeutic functions in Alzheimer's mice.

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There is vast knowledge on pathogenic mechanisms in Alzheimer's disease but very little on means by which the brain protects itself from disease. A major candidate in providing neuroprotection is the resident brain neural precursor/stem cell (NPC) pool. Transplanted NPCs possess powerful

Improvement of the anoxia-induced mitochondrial dysfunction by membrane modulation.

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The mitochondrial dysfunction induced by anoxia in vitro was improved with chlorpromazine, cepharanthine, bromophenacyl bromide, and mepacrine without affecting phospholipid or adenine nucleotide metabolisms. The drugs inhibited lipid peroxidation by Fe2+, mitochondrial disruption by Ca2+, and

[Effect of aluminum phosphate gel and Kangfuxin on esophageal pathology and IL-8 and PGE2 expressions in a rat model of reflux esophagitis].

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OBJECTIVE To explore the effect of aluminum phosphate gel and Kangfuxin on esophageal pathology and expressions of interleukin-8 (IL-8) and prostaglandin E2 (PGE2) in rats with reflux esophagitis and explore the possible mechanisms. METHODS Sixty SD rats were randomized into aluminum phosphate gel

Demyelination and remyelination in the rat central nervous system following ethidium bromide injection.

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Intracisternal injection of ethidium bromide induced status spongiosus with prominent degenerative changes in oligodendroglia in the subpial regions of the central nervous system of the rat. Chronologic investigation of the lesions has revealed that status spongiosus resulted in myelin degeneration,

Na+ channel aggregation in remyelinating mouse sciatic axons following transection.

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Mouse sciatic nerves from the degeneration-resistant strain C57BL/6/Wld (Ola) were surgically injected with lysolecithin to induce focal demyelination. Three days later they were transected adjacent to the spinal cord to eliminate contact of the axons with their cell bodies. The Na+ channel

Therapeutic effects of progesterone in animal models of neurological disorders.

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Substantial evidence supports that progesterone exerts many functions in the central and peripheral nervous system unrelated to its classical role in reproduction. In this review we first discussed progesterone effects following binding to the classical intracellular progesterone receptors A and B

Mouse models of multiple sclerosis: lost in translation?

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Multiple sclerosis (MS) is a chronic neurological disorder of the central nervous system (CNS) leading to progressive accumulation of neurological deficits arising from recurrent episodes of inflammation, demyelination and neuronal degeneration. While the aetiology of the disease is unknown MS is

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