This article is a US Government work and, as such, is in the public domain in the United States of America.
Identification and morphological classification of horizontal, bipolar, and amacrine cells within the zebrafish retina†
Article first published online: 20 AUG 2004
Published 2004 Wiley-Liss, Inc.
Journal of Comparative Neurology
Volume 477, Issue 4, pages 371–385, 27 September 2004
How to Cite
Connaughton, V.P., Graham, D. and Nelson, R. (2004), Identification and morphological classification of horizontal, bipolar, and amacrine cells within the zebrafish retina. J. Comp. Neurol., 477: 371–385. doi: 10.1002/cne.20261
- Issue published online: 20 AUG 2004
- Article first published online: 20 AUG 2004
- Manuscript Accepted: 13 MAY 2004
- Manuscript Revised: 7 APR 2004
- Manuscript Received: 17 DEC 2003
- American University Mellon Research Award
- retinal slice;
- gene gun;
- retinal circuitry
Horizontal, bipolar, and amacrine cells in the zebrafish retina were morphologically characterized using DiOlistic techniques. In this method, 1,1′-dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate (DiI)-coated microcarriers are shot at high speed onto the surfaces of living retinal slices where the DiI then delineates axons, somata, and dendrites of isolated neurons. Zebrafish retinal somata were 5–10 μm in diameter. Three horizontal cell types (HA-1, HA-2, and HB) were identified; dendritic tree diameters averaged 25–40 μm. HA somata were round. Cells classified as HA-2 were larger than HA-1 cells and possessed an axon. HB somata were flattened, without an axon, although short fusiform structure(s) projected from the soma. Bipolar cells were separated into 17 morphological types. Dendritic trees ranged from 10 to 70 μM. There were six Bon types with axon boutons only in the ON sublamina of the inner plexiform layer (IPL), and seven Boff types with axon boutons or branches only in the OFF sublamina. Four types of bistratified bipolar cells displayed boutons in both ON and OFF layers. Amacrine cells occurred in seven types. Aoff cells (three types) were monostratified and ramified in the IPL OFF sublamina. Dendritic fields were 60–150 μM. Aon pyriform cells (three types) branched in the ON sublamina. Dendritic fields were 50–170 μM. Adiffuse cells articulated processes in all IPL strata. Dendritic fields were 15–90 μM. These findings are important for studies examining signal processing in zebrafish retina and for understanding changes in function resulting from mutations and perturbations of retinal organization. J. Comp. Neurol. 477:371–385, 2004. Published 2004 Wiley-Liss, Inc.