Cited by 59Congenital heart defects researchCardiac Fibrosis and RemodelingDevelopmental Biology and Gene Regulation

Thymosin beta 4 is dispensable for murine cardiac development and function.

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Banerjee, Indroneal, Zhang, Jianlin, Moore-Morris, Thomas, Lange, Stephan, Shen, Tao, Dalton, Nancy D., Gu, Yusu, Peterson, Kirk L. +2 more·2012·Circulation Research

Abstract

Rationale: Thymosin beta 4 (Tβ4) is a 43–amino acid factor encoded by an X-linked gene. Recent studies have suggested that Tβ4 is a key factor in cardiac development, growth, disease, epicardial integrity, and blood vessel formation. Cardiac-specific short hairpin (sh)RNA knockdown of tβ4 has been reported to result in embryonic lethality at E14.5–16.5, with severe cardiac and angiogenic defects. However, this shRNA tβ4 -knockdown model did not completely abrogate Tβ4 expression. To completely ablate Tβ4 and to rule out the possibility of off-target effects associated with shRNA gene silencing, further studies of global or cardiac-specific knockouts are critical. Objective: We examined the role of Tβ4 in developing and adult heart through global and cardiac specific t β4-knockout mouse models. Methods and Results: Global t β 4 -knockout mice were born at mendelian ratios and exhibited normal heart and blood vessel formation. Furthermore, in adult global t β 4 -knockout mice, cardiac function, capillary density, expression of key cardiac fetal and angiogenic genes, epicardial marker expression, and extracellular matrix deposition were indistinguishable from that of controls. Tissue-specific t β 4 -deficient mice, generated by crossing t β 4 -floxed mice to Nkx2.5-Cre and α MHC-Cre , were also found to have no phenotype. Conclusions: We conclude that Tβ4 is dispensable for embryonic viability, heart development, coronary vessel development, and adult myocardial function.

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Authors
Banerjee, I., Zhang, J., Moore-Morris, T., Lange, S., Shen, T., Dalton, N. D., Gu, Y., Peterson, K. L., Evans, S. M., & Chen, J.
Affiliations
  • University of California San Diego (US)
  • From the Department of Medicine (I.B., J.Z., S.L., T.S., N.D.D., Y.G., K.L.P., S.M.E., J.C.) and Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California–San Diego, La Jolla, CA (T.M.M., T.S., S.M.E.).
Corresponding author
Chen, Ju
Venue
Circulation Research
Published
2012-02-03
Volume
110
Issue
3
Pages
456-464
ISSN
  • 0009-7330 (ISSN-L)
  • 1524-4571
OpenAlex
W2020964402
Cited by
59
References
31
Citations by year
2023: 2 · 2022: 3 · 2021: 4 · 2020: 1 · 2019: 4 · 2018: 8 · 2016: 5 · 2015: 5 · 2014: 7 · 2013: 10 · 2012: 10
FWCI
3.51
Type
journal article
Language
en
Open access
Locations
  • Circulation Research (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (1r01hl106968-01)
  • National Heart, Lung, and Blood Institute (R01-HL106968, R01HL066100, DP1HL117649, T32HL007444)
  • National Institute of Neurological Disorders and Stroke (P30NS047101)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Congenital heart defects research
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
thymosin beta 4, heart development, cardiac function, cardiac-specific knockout, coronary vessel development, angiogenesis, epicardium, capillary density, extracellular matrix, embryonic lethality
MeSH terms
Thymosin beta(4), Animals, Coronary Vessels, Female, Heart, Male, Thymosin, Mice, Knockout, Gene Expression Regulation, Developmental, Neovascularization, Physiologic, Models, Animal, RNA, Small Interfering, Embryonic Development, Mice

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