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Developmental changes of calretinin immunoreactivity in the lamprey spinal cord
- Source :
-
Brain Research Bulletin . Mar2008, Vol. 75 Issue 2-4, p428-432. 5p. - Publication Year :
- 2008
-
Abstract
- Abstract: We studied the distribution of calretinin immunoreactivity (CR-ir) in the rostral and intermediate levels of the spinal cord of lampreys from embryonic to adult periods. CR-ir was first observed at hatching in motoneurons and primary sensory neurons of the spinal cord, the dorsal cells. During the prolarval period two new cell types showed CR-ir: ganglion cells and interneurons. Motoneurons, dorsal cells, and ganglion cells were strongly positive, whereas interneurons were weakly stained in late prolarvae. The intensity of CR-ir in these four types of cells changed during the larval period. Increase of CR-expression was found in interneurons but a decrease in dorsal cells and in ganglion cells. These changes were more evident in premetamorphic larvae. Postmetamorphic lampreys showed almost no CR-ir in dorsal cells. In adult lampreys, the interneurons showed the highest CR-ir, whereas motoneurons were more weakly stained than in earlier stages of development. Moreover, in adults the dorsal cells and the ganglion cells showed no CR-ir. The present study shows that CR-ir changes during lamprey spinal cord development in different types of neurons, sometimes in opposite ways. This plasticity of CR-expression may indicate different needs from subsets of lamprey spinal cord cells involved in the different locomotor behaviors along its life cycle. [Copyright &y& Elsevier]
- Subjects :
- *RETINAL ganglion cells
*SENSORY neurons
*MOTOR neurons
*LAMPREYS
Subjects
Details
- Language :
- English
- ISSN :
- 03619230
- Volume :
- 75
- Issue :
- 2-4
- Database :
- Academic Search Index
- Journal :
- Brain Research Bulletin
- Publication Type :
- Academic Journal
- Accession number :
- 31303370
- Full Text :
- https://doi.org/10.1016/j.brainresbull.2007.10.021