PUBLICATION
Ccn2a-FGFR1-SHH signaling is necessary for intervertebral disc homeostasis and regeneration in adult zebrafish
- Authors
- Rayrikar, A.Y., Wagh, G.A., Santra, M., Patra, C.
- ID
- ZDB-PUB-221203-3
- Date
- 2022
- Source
- Development (Cambridge, England) 150(1): (Journal)
- Registered Authors
- Patra, Chinmoy, Rayrikar, Amey, Wagh, Ganesh
- Keywords
- CCN2, FGFR, Intervertebral disc, Regeneration, SHH, Zebrafish
- MeSH Terms
-
- Adult
- Aged
- Animals
- Cell Communication
- Connective Tissue Growth Factor/genetics
- Connective Tissue Growth Factor/metabolism
- Hedgehog Proteins/metabolism
- Intervertebral Disc*/metabolism
- Intervertebral Disc Degeneration*/genetics
- Intervertebral Disc Degeneration*/metabolism
- Intervertebral Disc Degeneration*/pathology
- Nucleus Pulposus/metabolism
- Nucleus Pulposus/pathology
- Receptor, Fibroblast Growth Factor, Type 1/genetics
- Receptor, Fibroblast Growth Factor, Type 1/metabolism
- Signal Transduction/genetics
- Zebrafish*
- Zebrafish Proteins/genetics
- Zebrafish Proteins/metabolism
- PubMed
- 36458546 Full text @ Development
Citation
Rayrikar, A.Y., Wagh, G.A., Santra, M., Patra, C. (2022) Ccn2a-FGFR1-SHH signaling is necessary for intervertebral disc homeostasis and regeneration in adult zebrafish. Development (Cambridge, England). 150(1):.
Abstract
Intervertebral disc (IVD) degeneration is the primary cause of back pain in humans. However, the cellular and molecular pathogenesis of IVD degeneration is poorly understood. This study shows that zebrafish IVDs possess distinct and non-overlapping zones of cell proliferation and cell death. We find that in zebrafish, cellular communication network factor 2a (ccn2a) is expressed in notochord and IVDs. Although IVD development appears normal in ccn2a mutants, the adult mutant IVDs exhibit decreased cell proliferation and increased cell death leading to IVD degeneration. Moreover, Ccn2a overexpression promotes regeneration through accelerating cell proliferation and suppressing cell death in wild-type aged IVDs. Mechanistically, Ccn2a maintains IVD homeostasis and promotes IVD regeneration by enhancing outer annulus fibrosus cell proliferation and suppressing nucleus pulposus cell death through augmenting FGFR1-SHH signaling. These findings reveal that Ccn2a plays a central role in IVD homeostasis and regeneration, which could be exploited for therapeutic intervention in degenerated human discs.
Genes / Markers
Expression
Phenotype
Mutations / Transgenics
Human Disease / Model
Sequence Targeting Reagents
Fish
Orthology
Engineered Foreign Genes
Mapping