header logo image header logo text
Downloads Login
Research
General Information
ZIRC
ZFIN ID: ZDB-PUB-180713-1
Bioelectric-calcineurin signaling module regulates allometric growth and size of the zebrafish fin
Daane, J.M., Lanni, J., Rothenberg, I., Seebohm, G., Higdon, C.W., Johnson, S.L., Harris, M.P.
Date: 2018
Source: Scientific Reports   8: 10391 (Journal)
Registered Authors: Harris, Matthew, Johnson, Stephen L.
Keywords: none
MeSH Terms:
  • Animal Fins/anatomy & histology
  • Animal Fins/growth & development*
  • Animals
  • Body Patterning/genetics
  • Calcineurin/genetics*
  • Calcineurin/metabolism
  • Calcineurin Inhibitors/pharmacology
  • Gene Expression Regulation, Developmental/genetics
  • Potassium Channels, Tandem Pore Domain/genetics*
  • Regeneration/genetics
  • Signal Transduction/genetics
  • Zebrafish/genetics*
  • Zebrafish/growth & development
  • Zebrafish Proteins/genetics*
PubMed: 29991812 Full text @ Sci. Rep.
FIGURES
ABSTRACT
The establishment of relative size of organs and structures is paramount for attaining final form and function of an organism. Importantly, variation in the proportions of structures frequently underlies adaptive change in morphology in evolution and maybe a common mechanism underlying selection. However, the mechanism by which growth is integrated within tissues during development to achieve proper proportionality is poorly understood. We have shown that signaling by potassium channels mediates coordinated size regulation in zebrafish fins. Recently, calcineurin inhibitors were shown to elicit changes in zebrafish fin allometry as well. Here, we identify the potassium channel kcnk5b as a key player in integrating calcineurin's growth effects, in part through regulation of the cytoplasmic C-terminus of the channel. We propose that the interaction between Kcnk5b and calcineurin acts as a signaling node to regulate allometric growth. Importantly, we find that this regulation is epistatic to inherent mechanisms instructing overall size as inhibition of calcineurin is able to bypass genetic instruction of size as seen in sof and wild-type fins, however, it is not sufficient to re-specify positional memory of size of the fin. These findings integrate classic signaling mediators such as calcineurin with ion channel function in the regulation of size and proportion during growth.
ADDITIONAL INFORMATION