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Updated: Jul 19, 2026
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Analysis of Cardiac Chamber Development During Mouse Embryogenesis Using Whole Mount Epifluorescence
Published on: April 17, 2019
The matricellular protein CCN1 is essential for cardiac development
1Department of Biochemistry and Molecular Genetics, University of Illinois at Chicago College of Medicine, Chicago, IL 60607, USA.
Circulation Research
|October 7, 2006
Summary
Deficiency in the matricellular protein CCN1 causes severe heart defects in mice, including atrioventricular septal defects. This protein is crucial for normal cardiac development and may be a candidate gene for human septal defects.
Area of Science:
- Cardiovascular Biology
- Developmental Biology
- Molecular Genetics
Background:
- The matricellular protein CCN1 (CYR61) is a key regulator of cellular processes like adhesion, migration, proliferation, survival, and differentiation.
- CCN1 interacts with integrin receptors and heparan sulfate proteoglycans to mediate its functions.
Purpose of the Study:
- To investigate the role of CCN1 in cardiac valvuloseptal morphogenesis.
- To determine the consequences of Ccn1 deficiency on heart development and identify potential genetic links to human septal defects.
Main Methods:
- Generation and analysis of Ccn1-null and Ccn1-haploinsufficient mouse models.
- Histological examination of embryonic hearts to assess septal development and cell apoptosis.
- Analysis of gelatinase activity in cardiac tissues.
Main Results:
- Ccn1-null mice exhibit severe atrioventricular septal defects (AVSD).
- Ccn1 haploinsufficiency leads to delayed ventricular septum formation and persistent ostium primum atrial septal defects (ASD) in a subset of adult mice.
- CCN1 deficiency causes precocious apoptosis in the atrial junction and impaired gelatinase activity during septal fusion.
Conclusions:
- CCN1 is essential for normal cardiac valvuloseptal morphogenesis.
- Ccn1 haploinsufficiency in mice serves as a genetic model for ostium primum ASD.
- CCN1 is implicated as a candidate gene for human AVSD, with the human CCN1 gene mapping to a known AVSD susceptibility locus.
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