PUBLICATION
Zebrafish fin regeneration involves generic and regeneration-specific osteoblast injury responses
- Authors
- Sehring, I.M., Mohammadi, H.F., Haffner-Luntzer, M., Ignatius, A., Huber-Lang, M., Weidinger, G.
- ID
- ZDB-PUB-220625-28
- Date
- 2022
- Source
- eLIFE 11: (Journal)
- Registered Authors
- Weidinger, Gilbert
- Keywords
- cell biology, developmental biology, zebrafish
- MeSH Terms
-
- Animals
- Osteoblasts
- Zebrafish Proteins/genetics
- Animal Fins/physiology
- Actomyosin*
- Osteogenesis
- Zebrafish*/genetics
- PubMed
- 35748539 Full text @ Elife
Citation
Sehring, I.M., Mohammadi, H.F., Haffner-Luntzer, M., Ignatius, A., Huber-Lang, M., Weidinger, G. (2022) Zebrafish fin regeneration involves generic and regeneration-specific osteoblast injury responses. eLIFE. 11:.
Abstract
Successful regeneration requires the coordinated execution of multiple cellular responses to injury. In amputated zebrafish fins, mature osteoblasts dedifferentiate, migrate towards the injury and form proliferative osteogenic blastema cells. We show that osteoblast migration is preceded by cell elongation and alignment along the proximodistal axis, which require actomyosin, but not microtubule turnover. Surprisingly, osteoblast dedifferentiation and migration can be uncoupled. Using pharmacological and genetic interventions, we found that NF-ĸB and retinoic acid signalling regulate dedifferentiation without affecting migration, while the complement system and actomyosin dynamics affect migration but not dedifferentiation. Furthermore, by removing bone at two locations within a fin ray, we established an injury model containing two injury sites. We found that osteoblasts dedifferentiate at and migrate towards both sites, while accumulation of osteogenic progenitor cells and regenerative bone formation only occur at the distal-facing injury. Together, these data indicate that osteoblast dedifferentiation and migration represent generic injury responses that are differentially regulated and can occur independently of each other and of regenerative growth. We conclude that successful fin bone regeneration appears to involve the coordinated execution of generic and regeneration-specific responses of osteoblasts to injury.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping