Study of the origin of connective tissue sheaths of peripheral nerves in the limb of avian embryos
Jazyk angličtina Země Německo Médium print
Typ dokumentu časopisecké články
PubMed
3223613
DOI
10.1007/bf00305043
Knihovny.cz E-zdroje
- MeSH
- končetiny inervace MeSH
- křepelky a křepelovití embryologie MeSH
- kuřecí embryo fyziologie MeSH
- periferní nervy cytologie embryologie MeSH
- pojivová tkáň embryologie MeSH
- zvířata MeSH
- Check Tag
- kuřecí embryo fyziologie MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
Quail-chick and chick-quail chimeras were constructed by grafting, isotopically, the limb bud of quail embryos into a chick of the same developmental stage and vice versa, prior to the entry of nerve fibres into the limb. After 5-14 days reincubation of the embryos, the components of the connective tissue sheaths of the peripheral nerves were observed by using Feulgen-Rossenbeck staining and light microscopy, in order to distinguish quail cells and chick cells. In all the chimeras studied, the connective tissue sheaths of peripheral nerves (the epineurium, perineurium, perineural septa and endoneural fibroblasts) were formed from the mesenchyme of the limb bud, while Schwann cells were of host origin. Also the outer and inner capsule of muscle spindles originated from the limb bud mesenchyme. These experiments suggest that the connective tissue sheaths of peripheral nerves (at least in the limb region of avian embryos) are not of neural crest origin, but are formed from limb bud mesenchyme.
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