potassium/atrofi

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Retraction and degeneration of sympathetic neurites in response to locally elevated potassium.

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Sympathetic neurons from superior cervical ganglia of newborn rats were plated into center compartments of 3-compartment culture dishes, allowing exposure of distal neurites to media of different composition than provided to cell bodies and proximal neurites. Cultures were maintained initially with

Laser fibre deterioration and loss of power output during photo-selective 80-w potassium-titanyl-phosphate laser vaporisation of the prostate.

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BACKGROUND The potassium-titanyl-phosphate (KTP) laser technique for photo-selective vaporisation of the prostate (PVP) has been regularly improved over the last decade. Nonetheless, decreasing efficiency of tissue vaporisation during the course of the operation and macroscopic alterations of the

Distribution of sodium and potassium channels as well as myelin associated glycoprotein (MAG) during the early stages of Wallerian degeneration.

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The distribution of sodium and potassium channel proteins and the myelin associated glycoprotein (MAG) was studied by immunofluorescence during the early stages of Wallerian degeneration. Routine electron microscopy was also performed in order to investigate the success of the lesion in producing

Alterations of sodium and potassium channels of RGCs in RCS rat with the development of retinal degeneration.

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All know that retinitis pigmentosa (RP) is a group of hereditary retinal degenerative diseases characterized by progressive dysfunction of photoreceptors and associated with progressive cells loss; nevertheless, little is known about how rods and cones loss affects the surviving inner retinal

Picosecond degenerate four-wave mixing on potassium in a methane-air flame.

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We demonstrate that picosecond mode-locked laser-based degenerate four-wave mixing can be detected with good signal-to-noise ratios in an optically thin flame and that detailed turbulence statistics can be acquired by use of this technique. A regeneratively mode-locked Ti:sapphire laser was tuned to

Potassium channel abnormalities are consistent with early axon degeneration of motor axons in the G127X SOD1 mouse model of amyotrophic lateral sclerosis.

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Amyotrophic lateral sclerosis (ALS) is a lethal neurodegenerative disease, which selectively affects upper and lower motoneurones. The underlying pathophysiology of the disease is complex but electrophysiological studies of peripheral nerves in ALS patients as well as human autopsy studies indicate

Potassium-induced stimulation of oxidative metabolism of glucose in cultures of intact cerebellar granule cells but not in corresponding cells with dendritic degeneration.

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Production of 14CO2 from uniformly labelled glucose was measured in conventional cultures of mouse cerebellar granule cells (a glutamatergic cell type) and in corresponding cultures which had been grown in such a manner that they showed massive degeneration of dendrites, but were otherwise

The changes of potassium currents in RCS rat Müller cell during retinal degeneration.

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Müller cells are the principal glial cells expressing membrane-bound potassium channel and predominantly mediating the homeostatic regulation of extracellular K+ produced by neuronal activity in retina. It's well known that Müller cells can be activated in many pathological conditions, but little is

The neuroprotection of hydrogen sulfide against MPTP-induced dopaminergic neuron degeneration involves uncoupling protein 2 rather than ATP-sensitive potassium channels.

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OBJECTIVE Hydrogen sulfide (H(2)S), a novel gaseous mediator, has been recognized to protect neurons from overexcitation by enhancing the activity of the adenosine triphosphate-sensitive potassium (K-ATP) channel. However, no direct evidence supports that the K-ATP channel contributes to the

Sodium and potassium currents influence Wallerian degeneration of injured Drosophila axons.

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Axons degenerate after injury and in neuropathies and disease via a self-destruction program whose mechanism is poorly understood. Axons that have lost connection to their cell bodies have altered electrical and synaptic activities, but whether such changes play a role in the axonal degeneration

Mitochondrial ATP-sensitive potassium channels enhance angiotensin-induced oxidative damage and dopaminergic neuron degeneration. Relevance for aging-associated susceptibility to Parkinson's disease.

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Recent studies have shown that renin-angiotensin system overactivation is involved in the aging process in several tissues as well as in longevity and aging-related degenerative diseases by increasing oxidative damage and inflammation. We have recently shown that angiotensin II enhances dopaminergic

Dendritic potassium channel dysfunction may contribute to dendrite degeneration in spinocerebellar ataxia type 1.

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Purkinje neuron dendritic degeneration precedes cell loss in cerebellar ataxia, but the basis for dendritic vulnerability in ataxia remains poorly understood. Recent work has suggested that potassium (K+) channel dysfunction and consequent spiking abnormalities contribute to Purkinje neuron

Relationship between rat retinal degeneration and potassium channel KCNQ5 expression.

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KCNQ5/Kv7.5 is a low-threshold non-inactivating voltage-gated potassium channel preferentially targeted to excitatory endings in brain neurons. The M-type current is mediated by KCNQ5 channel subunits in monkey retinal pigment epithelium cells and in brain neurons. This study was undertaken to

Degenerate n-doping of few-layer transition metal dichalcogenides by potassium.

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We report here the first degenerate n-doping of few-layer MoS2 and WSe2 semiconductors by surface charge transfer using potassium. High-electron sheet densities of ~1.0 × 10(13) cm(-2) and 2.5 × 10(12) cm(-2) for MoS2 and WSe2 are obtained, respectively. In addition, top-gated WSe2 and MoS2 n-FETs

High-power potassium-titanyl-phosphate laser fibres for endovaporization of benign prostatic hyperplasia: how much do they deteriorate during the procedure?

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OBJECTIVE • To assess the residual power delivered at the tip of a high-power (80 W) potassium-titanyl-phosphate (KTP) laser (80 W Green Light PV(TM), Laserscope(®); American Medical Systems, Minnetonka, MN, USA) at the end of a photoselective vaporization of the prostate (PVP) procedure, as well as

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