During early vertebrate heart development, the heart transitions from a linear tube to a complex asymmetric structure, a morphogenetic process that occurs simultaneously with growth of the heart. Cardiac growth during early heart morphogenesis is driven by deployment of cells from the second heart field (SHF) into both poles of the heart. Laminin is a core component of the extracellular matrix and, although mutations in laminin subunits are linked with cardiac abnormalities, no role for laminin has been identified in early vertebrate heart morphogenesis. We identified tissue-specific expression of laminin genes in the developing zebrafish heart, supporting a role for laminins in heart morphogenesis. Analysis of heart development in lamb1a zebrafish mutant embryos reveals mild morphogenetic defects and progressive cardiomegaly, and that Lamb1a functions to limit heart size during cardiac development by restricting SHF addition. lamb1a mutants exhibit hallmarks of altered haemodynamics, and blocking cardiac contractility in lamb1a mutants rescues heart size and atrial SHF addition. Together, these results suggest that laminin mediates interactions between SHF deployment and cardiac biomechanics during heart morphogenesis and growth in the developing embryo.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1242/dev.199691 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Abamectin Causes Neurotoxicity in Zebrafish Embryos.
Int J Mol Sci
January 2025
School of Life Science, Nanchang University, Nanchang 330031, China.
Abamectin is an insecticide, miticide and nematicide that has been extensively used in agriculture for many years. The excessive use of abamectin inevitably pollutes water and soil and might even cause adverse effects on aquatic biota. However, it is currently unclear how abamectin exposure causes neurotoxicity in aquatic organisms.
View Article and Find Full Text PDFExploring nagZ as a virulence biomarker and treatment target in Enterobacter cloacae.
BMC Microbiol
January 2025
Department of Laboratory Medicine, the Second Affiliated Hospital, Chongqing Medical University, Chongqing, 400010, P.R. China.
Background: Enterobacter cloacae is increasingly prevalent and resistant to multiple antibiotics, making it a significant pathogen in healthcare settings with high mortality rates. However, its pathogenic mechanisms are not fully understood.
Results: In this study, we explored the role of nagZ in regulating the virulence of E.
Sonic Hedgehog signaling regulates the optimal differentiation pace from early-stage mesoderm to cardiogenic mesoderm in mice.
Dev Growth Differ
January 2025
Division of Anatomy and Developmental Biology, Department of Anatomy, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto, Japan.
Sonic Hedgehog (Shh), encoding an extracellular signaling molecule, is vital for heart development. Shh null mutants show congenital heart disease due to left-right asymmetry defects stemming from functional anomaly in the midline structure in mice. Shh signaling is also known to affect cardiomyocyte differentiation, endocardium development, and heart morphogenesis, particularly in second heart field (SHF) cardiac progenitor cells that contribute to the right ventricle, outflow tract, and parts of the atrium.
View Article and Find Full Text PDFToxicity of nickel, copper, and selenium in medaka embryos (oryzias latipes): a comparative study.
J Toxicol Sci
January 2025
Department of Creative engineering, National Institute of Technology, Ariake College.
Article Synopsis
- The study emphasizes the significance of nickel, copper, and selenium as essential biometals in various industries, but highlights their harmful impact as environmental pollutants when they exceed normal levels, particularly in aquatic ecosystems.
- Research on medaka fish embryos revealed that exposure to these biometals led to significant developmental abnormalities and increased mortality rates throughout a 14-day observation period.
- Gene expression analysis showed that copper was the most toxic, affecting over 4,700 genes, while all three biometals caused detrimental effects on fish embryo development, underscoring the necessity of monitoring biometal levels to protect aquatic life.
Anxiety of microbially synthesized FeO-SPIONs on embryonic/larval ontogeny in red tilapia (Oreochromis sp.).
Appl Microbiol Biotechnol
January 2025
National Institute of Oceanography and Fisheries (NIOF), Cairo, Egypt.
Iron oxide nanoparticles, recognized for their superparamagnetic properties, are promising for future healthcare therapies. However, their extensive use in medicine and electronics contributes to their discharge into our environments, highlighting the need for further research on their cellular damage effects on aquatic organisms. While the detrimental properties of other compounds have been stated in the early-life stages of fish, the cytotoxic consequences of superparamagnetic iron oxide nanoparticles (SPIONs) in these stages are still unexplored.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!