Summary
Previous studies have shown that ciliogenesis in the epithelial cells of various species exhibits similarities as well as differences. In an attempt to establish whether this process is identical in epithelial cells of a single species, early stages of centriole formation not previously described were encountered. Ciliogenesis was investigated in the respiratory epithelium of the nasal cavity of 18 to 23-day-old rabbit embryos. The appearance of groups of deuterosomes and fibrous granules is followed by the radial formation of procentrioles around the deuterosomes and parent centrioles. The majority of the procentrioles, forming acentriolarly, occur in pairs, with their distal ends facing each other, between the deuterosomes. Subsequent growth of these procentrioles between deuterosomes in a group results in separating the deuterosomes from one another. The deuterosomes, however, still remain interconnected by means of the growing procentrioles. Accordingly, long chains and networks consisting of the above-mentioned structures are formed. After the procentrioles have attained a certain length, the chains and networks split into separate deuterosome-procentriole complexes. During these earlier stages of ciliogenesis fibrous granules are present, however, their function is yet to be determined.
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Loots, G.P., Nel, P.P.C. Early stages of ciliogenesis in the respiratory epithelium of the nasal cavity of rabbit embryos. Cell Tissue Res. 255, 589–594 (1989). https://doi.org/10.1007/BF00218795
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DOI: https://doi.org/10.1007/BF00218795