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Stochastic morphological swings in regeneration: A manifestation of noisy canalized morphogenesis.
Proc Natl Acad Sci U S A
January 2025
Department of Physics and Network Biology Research Laboratories, Technion-Israel Institute of Technology, Haifa 32000, Israel.
Animal morphogenesis, the development of an organism's body form, is commonly perceived as a directed and almost deterministic process. However, noise and stochastic fluctuations are ubiquitous in biological systems. The questions on the role of fluctuations in morphogenesis and what ensures the robustness of this process under noisy conditions remain elusive.
View Article and Find Full Text PDFApoptosis-dependent head development during metamorphosis of the cnidarian Hydractinia symbiolongicarpus.
Dev Biol
December 2024
Centre for Chromosome Biology, School of Biological and Chemical Sciences, University of Galway, Galway, Ireland. Electronic address:
Apoptosis is a regulated cell death that depends on caspases. It has mainly been studied as a mechanism for the removal of unwanted cells. However, apoptotic cells can induce fate or behavior changes of their neighbors and thereby participate in development.
View Article and Find Full Text PDFTGF-β signaling molecules in : role of BMP and BMP inhibitors during pattern formation.
Int J Dev Biol
May 2024
Developmental Biology Group, MACS-Agharkar Research Institute, Pune, India.
Understanding the evolution of body plans has been one of the major areas of investigation in developmental and evolutionary biology. Cnidaria, the sister group to bilaterians, provides an opportunity to elucidate the origin and evolution of body axes. , a freshwater cnidarian, is a useful model to study signaling pathways governing pattern formation, which are conserved up to vertebrates including humans.
View Article and Find Full Text PDFAdhesion of Acanthamoeba on Scleral Contact Lenses According to Lens Shape.
Invest Ophthalmol Vis Sci
May 2024
Department of Ophthalmology and Visual Sciences, Paulista School of Medicine, São Paulo Hospital, Federal University of São Paulo, São Paulo, SP, Brazil - UNIFESP.
Purpose: To investigate the adhesion of Acanthamoeba to scleral contact lens (ScCL) surface according to lens shape.
Methods: Two strains of A. polyphaga (CDC:V062 and ATCC 30461) and one clinical Acanthamoeba isolate, were inoculated onto five contact lens (CL): one first-generation silicone hydrogel (SHCL; lotrafilcon B; adhesion control) containing plasma surface treatment; two ScCL (fluorosilicone acrylate) one containing surface treatment composed of plasma and the other containing plasma with Hydra-PEG, and two CL designed with a flat shape having the same material and surface treatments of the ScCL.
Shape transitions in a network model of active elastic shells.
Soft Matter
September 2023
Department of Physics, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat Gan 5290002, Israel.
Morphogenesis involves the transformation of initially simple shapes, such as multicellular spheroids, into more complex 3D shapes. These shape changes are governed by mechanical forces including molecular motor-generated forces as well as hydrostatic fluid pressure, both of which are actively regulated in living matter through mechano-chemical feedback. Inspired by autonomous, biophysical shape change, such as occurring in the model organism hydra, we introduce a minimal, active, elastic model featuring a network of springs in a globe-like spherical shell geometry.
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