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Terminal sprouting in partially denervated muscle of the mouse: a scanning electron microscopic study
Springer Science and Business Media LLC - Tập 17 - Trang 563-571 - 1988
Terminal sprouting in the mouse gastrocnemius muscle was examined by scanning electron microscopy after partial denervation. After one of the two muscle nerves in the medial head was cut, terminal sprouts arose from the outer edge of the intact motor endplates and grew out onto a connective tissue layer on the muscle fibres. The sprouts were very slender along their length, although some had a var......
Immunocytochemical identification of GABA in astrocytes located in white matter after inhibition of GABA-transaminase with gamma-acetylenic GABA
Springer Science and Business Media LLC - Tập 20 - Trang 290-298 - 1991
Several lines of evidence suggest that astrocytes contribute to the uptake and degradation of the inhibitory neurotransmitter γ-aminobutyric acid (GABA). Recent immunohistochemical studies have shown that GABA-like immunoreactivity can be demonstrated in astrocytes in the grey matter of the rat's brainstem. The present study investigates whether GABA is also present in astrocytes located in the wh......
A giant nerve net with multi-effector synapses underlying epithelial adhesive strips in the mouth ofBeroë (Ctenophora)
Springer Science and Business Media LLC - Tập 24 - Trang 711-723 - 1995
We present ultrastructural evidence for the first known example of a giant nerve net in the phylum Ctenophora. The giant fibre system inBeroë underlies paired strips of adherent epithelial cells that run inside the lips. Interlocking actin-lined cell junctions between opposing adhesive strips keepBeroë's large mouth closed while the ctenophore searches for prey. The giant neurons, up to 6–8 μm in ......
The Nogo receptor, its ligands and axonal regeneration in the spinal cord; A review
Springer Science and Business Media LLC - Tập 31 - Trang 93-120 - 2002
At least three proteins present in CNS myelin, Nogo, MAG and OMgp are capable of causing growth cone collapse and inhibiting neurite outgrowth in vitro. Surprisingly, Nogo and OMgp are also strongly expressed by many neurons (including neocortical projection cells). Nogo expression is increased by some cells at the borders of CNS lesion sites and by cells in injured peripheral nerves, but Nogo and......
Survival, proliferation and morphological specialization of mouse Schwann cells in a serum-free, fully defined medium
Springer Science and Business Media LLC - Tập 9 - Trang 683-697 - 1980
Neonatal mouse dorsal root ganglionic (DRG) cell dissociates were cultured in a synthetic medium with horse serum or the serum-free supplement N1 (insulin, transferrin, progesterone, putrescine, selenium). Serum-supplemented cultures with added nerve growth factor (NGF) yielded neurons, small flat and spindle cells (Schwann) and large flat cells (fibroblastic elements). However, in serum-free, N1-......
S-laminin and N-acetylgalactosamine located at the synaptic basal lamina of skeletal muscle are involved in synaptic recognition by growing neurites
Springer Science and Business Media LLC - Tập 24 - Trang 903-915 - 1995
The purpose of the work reported here is to identify molecular components of the synaptic basal lamina of skeletal muscle fibres which allow recognition of original synaptic sites by regenerating motor axons. We focused on s-larninin and components recognized by the lectinDolichos biflorus agglutinin previously shown to be specifically located at the synaptic basal lamina. We used a cryoculture bi......
Double myelination of axons in the sympathetic nervous system of the mouse. II. Mechanisms of formation
Springer Science and Business Media LLC - Tập 17 - Trang 263-276 - 1988
The phenomenon termed ‘double myelination’, present in sympathetic nerve of normal adult rats and mice, comprises regions of a myelinated axon which are concentrically ensheathed by additional (outer) myelinating Schwann cells. Evidence has been presented that in some instances the outer Schwann cell fails to make contact with an axon, yet its myelin sheath characteristically remains ultrastructur......
Ballooning of myelin sheaths in normally aged macaques
Springer Science and Business Media LLC - Tập 27 - Trang 605-614 - 1998
In aged animal brains, a variety of holes are formed in the neuropil. One type of hole, here designated as the myelin balloon, is an abnormality of the myelin sheath and is found in a number of diverse sites in the brain. Profiles of myelin balloons display rather smoothly rounded peripheral contours and typically range up to 10 μm in diameter, although exceptionally large examples may be twice th......
Glial cell responses, complement and apolipoprotein J expression following axon injury in the neonatal rat
Springer Science and Business Media LLC - Tập 28 - Trang 559-570 - 1999
Immature motoneurons are highly susceptible to degeneration following axon injury. The response of perineuronal glia to axon injury may significantly influence neuronal survival and axon regeneration. We have examined the central reactions to neonatal facial nerve transection with emphasis on the expression of complement component C3 (C3) and the multifunctional apolipoprotein J (ApoJ). Axotomy wa......
Lysosomal activity at nodes of Ranvier during retrograde axonal transport of horseradish peroxidase in alpha-motor neurons of the cat
Springer Science and Business Media LLC - Tập 19 - Trang 989-1002 - 1990
Lysosomal activity at nodes of Ranvier of feline hindlimb alpha-motor neurons was examined by light and electron microscopical acid phosphatase (AcPase) histochemistry during retrograde axonal transport of intramuscularly injected horseradish peroxidase (HRP). Several nodes along the PNS parts of the alpha-motor axons of the HRP-injected side showed accumulations of AcPase-positive bodies in the c......
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