Zhang L, Bonilla S, Zhang Y, Leung YF. p35 promotes the differentiation of amacrine cell subtype in the zebrafish retina under the regulation of egr1.
Dev Dyn 2013;
243:315-23. [PMID:
24115595 DOI:
10.1002/dvdy.24061]
[Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 08/18/2013] [Accepted: 08/28/2013] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND
Early growth response 1 (egr1) is a transcription factor (TF) for controlling the differentiation of Parvalbumin (Parv) -expressing amacrine cells (ACs) in zebrafish. However, the downstream factors of this process have not been identified. The purpose of this study was to investigate the role of p35, a neuronal-specific activator of cyclin-dependent kinase 5 (Cdk5) and a known in vitro target of egr1, in the differentiation of these ACs.
RESULTS
In the p35-knockdown retinas, Parv+ but not islet1+ ACs were specifically reduced. This phenotype was highly similar to that in the Egr1-knockdown retinas. Furthermore, p35 expression was reduced in the Egr1-knockdown retinas, particularly in the AC region; while egr1 was only modestly reduced in this region in the p35-knockdown retinas.
CONCLUSIONS
p35 likely acts downstream of egr1 to control the differentiation of Parv+ ACs.
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