The zebrafish cohesin protein Sgo1 is required for cardiac function and eye development
Sarah M Kamel1, Sanne Broekman2,3, Federico Tessadori1
1Hubrecht Institute-KNAW, University Medical Centre Utrecht, Utrecht, The Netherlands.
Background:
Cohesinopathies is a term that refers to/covers rare genetic diseases caused by mutations in the cohesin complex proteins. The cohesin complex is a multiprotein complex that facilitates different aspects of cell division, gene transcription, DNA damage repair, and chromosome architecture. Shugoshin proteins prevent the cohesin complex from premature dissociation from chromatids during cell division. Patients with a homozygous missense mutation in SGO1, which encodes for Shugoshin1, have problems with normal pacing of the heart and gut.
Results:
To study the role of shugoshin during embryo development, we mutated the zebrafish sgo1 gene. Homozygous sgo1 mutant embryos display various phenotypes related to different organs, including a reduced heart rate accompanied by reduced cardiac function. In addition, sgo1 mutants are vision-impaired as a consequence of structurally defective and partially non-functional photoreceptor cells. Furthermore, the sgo1 mutants display reduced food intake and early lethality.
Conclusion:
We have generated a zebrafish model of Sgo1 that showed its importance during organ development and function.
Insights
Mutations in Shugoshin1 (SGO1) cause cohesinopathies, rare genetic disorders. Zebrafish lacking SGO1 exhibit developmental defects, including impaired heart function, vision loss, and early lethality, highlighting SGO1
Area of Science:
- Genetics
- Developmental Biology
- Molecular Biology
Background:
- Cohesinopathies are rare genetic diseases stemming from mutations in cohesin complex proteins.
- The cohesin complex is vital for cell division, gene transcription, DNA repair, and chromosome structure.
- Shugoshin proteins, including Shugoshin1 (SGO1), regulate cohesin function during cell division.
Purpose of the Study:
- To investigate the role of Shugoshin1 (SGO1) in embryonic development.
- To establish a zebrafish model for studying SGO1 function and associated cohesinopathies.
Main Methods:
- Generation of a zebrafish model with a mutated sgo1 gene.
- Phenotypic analysis of homozygous sgo1 mutant embryos.
Main Results:
- Homozygous sgo1 mutant zebrafish embryos displayed significant developmental abnormalities.
- Observed phenotypes included reduced heart rate, impaired cardiac function, vision impairment due to defective photoreceptors, reduced food intake, and early lethality.
- These findings indicate SGO1's critical role in organ development and function.
Conclusions:
- The generated zebrafish model effectively demonstrates the essential role of SGO1 during organogenesis and overall function.
- This model provides a valuable tool for further research into cohesinopathies and SGO1-related developmental disorders.
