Rayrikar , AY and Wagh, GA and Santra, MK and Patra, C (2023) Ccn2a-FGFR1-SHH signaling is necessary for intervertebral disc homeostasis and regeneration in adult zebrafish. Development, 150 (1). p. 201036.

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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.

Item Type:	Article
Additional Information:	1.Agharkar Research Institute, Pune, Maharashtra 411004, India. 2.S P Pune University, Pune, Maharashtra 411007, India. 3.National Centre for Cell Science, Pune, Maharashtra 411007, India
Subjects:	Stem Cell Biology
Depositing User:	Mr. Rameshwar Nema
Date Deposited:	11 Jan 2023 11:15
Last Modified:	11 Jan 2023 11:15
URI:	http://nccs.sciencecentral.in/id/eprint/1236

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