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Published on: August 10, 2018
Scube2 Modulates Coronary Vessel Formation During Cardiac Growth and Regeneration in Zebrafish
Ke-Hsuan Wei1, Ann Nee Lee1, Kaushik Chowdhury1,2
1Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan (K.-H.W., A.N.L., K.C., A.-J.C., Y.-J.H., K.-C.T., Y.-T.C., Y.-M.C., R.-B.Y., S.-L.L.).
Arteriosclerosis, Thrombosis, and Vascular Biology
|July 9, 2026
Summary
Signal peptide-CUB-EGF domain-containing protein 2 (Scube2) is crucial for coronary vessel formation and cardiac repair in zebrafish. It promotes PDGF signaling, enhancing vascular remodeling and myocardial regeneration after injury.
Area of Science:
- Cardiovascular Biology
- Regenerative Medicine
- Developmental Biology
Background:
- Coronary vessel formation is vital for heart growth and repair, but the underlying extracellular mechanisms are not fully understood.
- Signal peptide-CUB-EGF domain-containing protein 2 (Scube2) is involved in vascular signaling, yet its specific roles in coronary development and cardiac regeneration remain unclear.
Purpose of the Study:
- To investigate the function of Scube2 in coronary vessel formation and cardiac regeneration using zebrafish models.
- To elucidate the molecular mechanisms by which Scube2 regulates vascular remodeling and myocardial repair.
Main Methods:
- Utilized zebrafish genetic loss-of-function mutants and inducible dominant-negative models.
- Performed cryoinjury-induced cardiac regeneration studies with advanced imaging and transcriptomic analyses.
- Conducted biochemical analyses to examine Scube2's interactions with signaling pathways.
Main Results:
- Scube2 loss impaired coronary vessel development and caused myocardial abnormalities.
- Scube2 deficiency led to defective revascularization, reduced cell proliferation, persistent fibrosis, and impaired cardiac regeneration post-injury.
- Scube2 interacts with PDGF-B/PDGFRβ, enhancing signaling crucial for endothelial-mural cell communication.
Conclusions:
- Scube2 is a critical regulator of coronary vascularization and regenerative revascularization in zebrafish.
- Scube2 promotes PDGF-dependent interactions, coordinating vascular remodeling essential for myocardial regeneration.
- Targeting Scube2 and PDGF signaling may offer therapeutic strategies for cardiac repair.
