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Thyroid hormones reversibly inhibit metamorphic development in ophiuroid larvae.
J Exp Biol
January 2025
University of Guelph, 50 Stone Rd E, Guelph, N1G 2M7, Canada.
The timing of metamorphosis and settlement is critical for the survival and reproductive success of marine animals with biphasic life cycles. Thyroid hormones (THs) regulate developmental timing in diverse groups of chordates, including the regulation of metamorphosis in amphibians, teleosts, lancelets, tunicates, and lampreys. Recent evidence suggests a role for TH regulation of metamorphosis outside of the chordates, including echinoderms, annelids, and molluscs.
View Article and Find Full Text PDFCell shape modulates mitotic spindle positioning forces via intracellular hydrodynamics.
Curr Biol
December 2024
Université Paris Cité, CNRS, Institut Jacques Monod, 75013 Paris, France; Equipe Labellisée LIGUE Contre le Cancer, 75013 Paris, France. Electronic address:
The regulation of mitotic spindle positioning and orientation is central to the morphogenesis of developing embryos and tissues. In many multicellular contexts, cell geometry has been shown to have a major influence on spindle positioning, with spindles that commonly align along the longest cell shape axis. To date, however, we still lack an understanding of how the nature and amplitude of intracellular forces that position, orient, or hold mitotic spindles depend on cell geometry.
View Article and Find Full Text PDFDynamic responses during early development of the sea urchin Strongylocentrotus intermedius to CO-driven ocean acidification: A microRNA-mRNA integrated analysis.
Mar Pollut Bull
January 2025
Key Laboratory of Mariculture & Stock Enhancement in North China's Sea, Ministry of Agriculture and Rural Affairs, Dalian Ocean University, Dalian, Liaoning 116023, PR China. Electronic address:
To explore the dynamic molecular responses to CO-driven ocean acidification (OA) during the early developmental stages of sea urchins, gametes of Strongylocentrotus intermedius were fertilized and developed to the four-armed larva stage in either natural seawater (as a control; pH = 7.99 ± 0.01) or acidified conditions (ΔpH = -0.
View Article and Find Full Text PDFEfficient and Stable Extraction of Nano-Sized Plastic Particles Enabled by Bio-inspired Magnetic "Robots" in Water.
Environ Pollut
December 2024
Guangdong Provincial Key Laboratory of Water Quality Improvement and Ecological Restoration for Watersheds, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China; Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education, Institute of Environmental and Ecological Engineering, Guangdong University of Technology, Guangzhou, 510006, China.
In this research, a rationally-designed strategy was employed to address the crucial issue of removing nano-plastics (NPs) from aquatic environments, which was based on fabricating sea urchin-like structures of FeO magnetic robots (MagRobots). Through imitating the sea urchin's telescopic tube foot movement and predation mechanism, the unique structures of the MagRobots were designed to adapt to the size and surface interactions of NPs, leading to a high efficiency of NPs removal (99%), as evidenced by the superior performance of 594.3 mg/g for the removal of polystyrene (PS) nanoparticles from water, with 3300% increase over magnetic FeO without structural design.
View Article and Find Full Text PDFA mechanosensitive circuit of FAK, ROCK, and ERK controls biomineral growth and morphology in the sea urchin embryo.
Proc Natl Acad Sci U S A
January 2025
Department of Marine Biology, Charney School of Marine Sciences, University of Haifa, Haifa 3498838, Israel.
Biomineralization is the utilization of different minerals by a vast array of organisms to form hard tissues and shape them in various forms. Within this diversity, a common feature of all mineralized tissues is their high stiffness, implying that mechanosensing could be commonly used in biomineralization. Yet, the role of mechanosensing in biomineralization is far from clear.
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