RRC ID 31346
Author Yokoyama TD, Hotta K, Oka K.
Title Comprehensive morphological analysis of individual peripheral neuron dendritic arbors in ascidian larvae using the photoconvertible protein Kaede.
Journal Dev Dyn
Abstract BACKGROUND:Ascidian larval epidermal sensory neurons (ESNs) each extend a single cilium into the outer body structure, or tunic, to form a unique external sensory network, the ASNET (ascidian dendritic network in tunic). The functions of ESNs and the ASNET are unknown, though it has been suggested that they play important roles in swimming larvae. In this study, we used transgenic larva expressing the photoconvertible protein Kaede pan-neuronally to identify the orientation and morphology of single ESN external processes within the ASNET.
RESULTS:When individual ESN cell bodies were UV-irradiated, the photoconverted Kaede protein diffused into the external processes that projected to the edge of the tunic, indicating that these processes are cytoplasmically connected to the cell bodies of ESNs. We were, therefore, able to comprehensively catalog the morphology and orientation of each ESN external process. Most trunk ESNs appeared to extend neurites to the palp, but no processes were observed to emanate from palp neurons. ESN processes differed systematically in their morphology and orientation, suggesting that the ASNET is formed in a regulated, non-random fashion.
CONCLUSIONS:This study reveals the organization of ESN sensory fields in the ascidian larval tunic.
Volume 243(10)
Pages 1362-73
Published 2014-10-1
DOI 10.1002/dvdy.24169
PMID 25073890
MeSH Animals Animals, Genetically Modified Ciona intestinalis / genetics Ciona intestinalis / growth & development* Dendrites* / physiology Larva Luminescent Proteins / genetics* Peripheral Nervous System / cytology* Peripheral Nervous System / growth & development Sensory Receptor Cells / cytology* Urochordata / cytology Urochordata / genetics Urochordata / growth & development
IF 3.275
Times Cited 5
C.intestinalis / (O.japonicus) Wild C. int Tg[MiCiβ2TBK]2 Tg[MiCiPC2K]2 Tg[MiCiPC2K]3