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Moderate elevation ...
Moderate elevation of extracellular potassium transiently inhibits regeneration of sensory axons in cultured adult sciatic nerves
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- Edström, Anders (author)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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- Ekström, Per (author)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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- Wiklund, Peter (author)
- Lund University,Lunds universitet,Biologiska institutionen,Naturvetenskapliga fakulteten,Department of Biology,Faculty of Science
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(creator_code:org_t)
- 1995
- 1995
- English 7 s.
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In: Brain Research. - 0006-8993. ; 693:1-2, s. 148-154
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Abstract
Subject headings
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- The adult frog dorsal root ganglia (DRG) together with the sciatic nerve (ScN) has previously been shown to survive in organ culture for several days. If a local test crush is made at the beginning of culturing, there is an initial delay of about 3 days before the sensory axons start to grow into the distal nerve stump at a rate of about 0.6-0.9 mm/day. The present results showed that axonal growth was unaffected in preparations maintained for 8 days in medium containing 10 mM K+ (5 mM is the physiological level). In contrast, the outgrowth was markedly reduced by 15 mM K+ and still more by 20 and 25 mM K+. The growth inhibition was partially counteracted by nifedipine, a Ca2+-channel antagonist. Other experiments clearly showed that high K+ exerted its effects during the early phase of the regeneration and lacked effects at later stages. The possibility that Ca2+-binding proteins, e.g., calbindin, which showed immunohistochemical reactivity in different structures, contribute to the growth adaptation to high K+ will be considered. The generality of the findings was supported by inhibition of axonal outgrowth of adult mouse sciatic sensory axons by high K+.
Subject headings
- NATURVETENSKAP -- Biologi -- Cellbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Cell Biology (hsv//eng)
Keyword
- Calbindin
- Calcium
- Potassium
- Regeneration
- Schwann cell
- Sciatic nerve
Publication and Content Type
- art (subject category)
- ref (subject category)
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