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- aggregation classification "A1".
- aggregation creator B216520.
- aggregation creator B216521.
- aggregation creator person.
- aggregation creator person.
- aggregation date "2010".
- aggregation format "application/pdf".
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- aggregation isPartOf urn:issn:0175-8659.
- aggregation language "eng".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Biology and Life Sciences".
- aggregation title "The zebrafish (Danio rerio) caudal complex: a model to study vertebral body fusion".
- aggregation abstract "Impairment of segmentation during embryonic development leads to congenital fusion of vertebrae. Nevertheless, vertebral fusion can also occur during post-embryonic life. Fusion can cause reduction in mobility and may be pathological, but it can also be part of normal development and mechanically required, such as in the teleost caudal skeleton, or in the tetrapod sacrum. Using a series of closely spaced ontogenetic stages of zebrafish, stained for mineralized (Alizarin red) and cartilaginous (Alcian blue) structures, we have characterized all fusions occurring during the formation of the caudal skeleton. The urostyle results from the vertebral fusion of the compound centrum preural1-ural1 [PU1++U1] and ural2 [U2+]. Based on developmental and morphological characters: (i) number of vestigial haemal arches, (ii) occasional presence of a haemal arch rudiment, (iii) occasional individuals with separate centra rudiments or distinct mineralization time points, and (iv) evidence for internal separation, we propose that the urostyle forms as a fusion product of five, and not three vertebral centra, as previously described. The last fusion to occur in development, between the compound centrum [PU1++U1] and U2+, is a relatively slow process that typically occurs in Cypriniformes and Salmoniformes and is therefore considered reliable to monitor the fusion process. The vertebrae adjacent to the urostyle, preurals 2 and 3, are highly susceptible to fusion, and thus inadequate as a negative control to fusion, in contrast to trunk vertebrae, where fusion is never observed. With this we have established the basis for a new model to study vertebral fusion and to unravel cellular and molecular events underlying this process.".
- aggregation authorList BK478049.
- aggregation endPage "238".
- aggregation issue "2".
- aggregation startPage "235".
- aggregation volume "26".
- aggregation aggregates 1004487.
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