Abstract
We have investigated the developmental origin and ultrastructure of avian Merkel cells by electron microscopy and chick/quail transplantation experiments.
On embryonic day 3, chick leg primordia were homotopically grafted onto Japanese quail host embryo. Fourteen days later, quail cells that had migrated into grafted chick legs were identified according to the masses of heterochromatin associated with the nucleolus that are characteristic for quail. Both in chick and quail, Merkel cells are usually located in the dermis just below the epidermis. They are placed between nerve terminals either individually or in small groups wrapped in sheaths that are formed by glial cell processes. Occasionally, some Merkel cells appear in nerve fascicles and within Herbst corpuscles. Merkel cells, as well as glial cells, in grafted chicken legs were of quail origin. This finding provides evidence against the epidermal origin of avian Merkel cells and indicates that Merkel cells are derived from neural crest cells that colonise, together with glial cells and melanocytes, the developing limb primordium.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Accepted: 30 May 2000
Rights and permissions
About this article
Cite this article
Grim, M., Halata, Z. Developmental origin of avian Merkel cells. Anat Embryol 202, 401–410 (2000). https://doi.org/10.1007/s004290000121
Issue Date:
DOI: https://doi.org/10.1007/s004290000121