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Motile cilia defects impair cerebrospinal fluid (CSF) flow and can cause brain and spine disorders. The development of ciliated cells, their impact on CSF flow, and their function in brain and axial morphogenesis are not fully understood. We have characterized motile ciliated cells within the zebrafish brain ventricles. We show that the ventricles undergo restructuring through development, involving a transition from mono- to multiciliated cells (MCCs) driven by gmnc. MCCs co-exist with monociliated cells and generate directional flow patterns. These ciliated cells have different developmental origins and are genetically heterogenous with respect to expression of the Foxj1 family of ciliary master regulators. Finally, we show that cilia loss from the tela choroida and choroid plexus or global perturbation of multiciliation does not affect overall brain or spine morphogenesis but results in enlarged ventricles. Our findings establish that motile ciliated cells are generated by complementary and sequential transcriptional programs to support ventricular development.
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http://dx.doi.org/10.1016/j.celrep.2021.109775 | DOI Listing |
Proc Natl Acad Sci U S A
September 2025
The Biorobotics Institute, Scuola Superiore Sant'Anna, Pisa 56025, Italy.
Aquatic microorganisms typically inhabit a heterogeneous resource landscape, composed of localized and transient patches. To effectively exploit these resources, they have evolved a wide range of feeding strategies that combine chemotactic motility with active feeding flows. However, there is a notable lack of experimental studies that examine how these active flows shape resource fields to optimize feeding.
View Article and Find Full Text PDFAnn Surg Oncol
September 2025
Department of Thoracic Surgery, Clinical Oncology School of Fujian Medical University, Fujian Cancer Hospital, Fuzhou, Fujian Province, China.
Background: RUNX3 acts as a tumor suppressor gene in non-small-cell lung cancer (NSCLC), yet its specific biological mechanism is still unclear. This study aimed to uncover tumor microenvironment (TME) changes in NSCLC with varying RUNX3 expression statuses through single-cell RNA sequencing.
Patients And Methods: In total, seven patients with NSCLC with detailed pathological data were involved, with three both paracancerous and cancerous tissue samples.
ISME J
September 2025
Institute of Molecular Biology, Academia Sinica, Taipei, 11529, Taiwan.
Mutualistic endosymbiosis is a cornerstone of evolutionary innovation, enabling organisms to exploit diverse niches unavailable to individual species. However, our knowledge about the early evolutionary stage of this relationship remains limited. The association between the ciliate Tetrahymena utriculariae and its algal endosymbiont Micractinium tetrahymenae indicates an incipient stage of photoendosymbiosis.
View Article and Find Full Text PDFFront Microbiol
August 2025
Laboratory of Veterinary Public Health, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan.
Background: , an intracellular pathogen responsible for the pneumonia-like Legionnaires' disease in humans, inhabits aquatic environments, including man-made water systems such as water fountains, foot spas, and tap water, and exists as part of biofilms or as a protozoan parasite. As a bacterivore, provides a favorable environment for to establish a replicative niche (-containing vacuole; LCV) under environmental stress. Conversely, the Ofk308 strain, isolated from an Ashiyu foot spa, has been found to be cytotoxic to the ciliate CU427.
View Article and Find Full Text PDFbioRxiv
August 2025
Department of Biology and Biotechnology, Worcester Polytechnic Institute, Worcester, MA 01609.
Heterotrimeric G proteins transduce signals from G protein coupled receptors, which mediate key aspects of neuronal development and function. Mutations in the gene, which encodes Gαi1, cause a disorder characterized by developmental delay, intellectual disability, hypotonia, and epilepsy. However, the mechanistic basis for this disorder remains unknown.
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