ArticleCell stress & chaperones2008
Cardiac expression of Brn-3a and Brn-3b POU transcription factors and regulation of Hsp27 gene expression.
Article in Cell stress & chaperones, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed, 12 citations in OpenAlex.
- Vascular dysfunction caused by loss of Brn-3b/POU4F2 transcription factor in aortic vascular smooth muscle cells is linked to deregulation of calcium signalling pathways.Cell death & disease · 2023Article
- Linking metabolic dysfunction with cardiovascular diseases: Brn-3b/POU4F2 transcription factor in cardiometabolic tissues in health and disease.Cell death & disease · 2021Review
- The POU4F2/Brn-3b transcription factor is required for the hypertrophic response to angiotensin II in the heart.Cell death & disease · 2019Article
- Essential but partially redundant roles for POU4F1/Brn-3a and POU4F2/Brn-3b transcription factors in the developing heart.Cell death & disease · 2017Article
- Co-expression of POU4F2/Brn-3b with p53 may be important for controlling expression of pro-apoptotic genes in cardiomyocytes following ischaemic/hypoxic insults.Cell death & disease · 2014Article
- Brn3a regulates the transition from neurogenesis to terminal differentiation and represses non-neural gene expression in the trigeminal ganglion.Developmental dynamics : an official publication of the American Association of Anatomists · 2009Article
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Authors and funding
7 authors at 5 institutions in 2 countries.
Funding
Abstract
The Brn-3 family of transcription factors play a critical role in regulating expression of genes that control cell fate, including the small heat shock protein Hsp27. The aim of this study was to investigate the relationship between Brn-3a and Brn-3b and Hsp27 expression in the developing rodent heart. Brn-3a and Brn-3b were detected from embryonic days 9.5-10.5 (E9.5-E10.5) in the mouse heart, with significant increases seen later during development. Two isoforms (long and short) of each protein were detected during embryogenesis and postnatally. Brn-3a messenger RNA (mRNA) and protein were localized by E13.0 to the atrio-ventricular (AV) valve cushions and leaflets, outflow tract (OFT), epicardium and cardiac ganglia. By E14.5, Brn-3a was also localised to the septa and compact ventricular myocardium. An increase in expression of the long Brn-3a(l) isoform between E17 and adult coincided with a decrease in expression of Brn-3b(l) and a marked increase in expression of Hsp27. Hearts from Brn-3a-/- mice displayed a partially penetrant phenotype marked by thickening of the endocardial cushions and AV valve leaflets and hypoplastic ventricular myocardium. Loss of Brn-3a was correlated with a compensatory increase in Brn-3b and GATA3 mRNA but no change in Hsp27 mRNA. Reporter assays in isolated cardiomyocytes demonstrated that both Brn-3a and Brn-3b activate the hsp27 promoter via a consensus Brn-3-binding site. Therefore, Brn-3 POU factors may play an important role in the development and maintenance of critical cell types and structures within the heart, in part via developmental regulation of myocardial Hsp27 expression. Furthermore, Brn-3a may be necessary for correct valve and myocardial remodelling and maturation.
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