Fasciola gigantica: Ultrastructural localisation of neoblast recruitment in somatic tissues during growth and development in the hepatic parenchyma of experimentally infected mice.

Autor: Hanna REB; Veterinary Sciences Division, Agri-Food and Biosciences Institute (AFBI), Stormont, Belfast BT4 3SD, United Kingdom. Electronic address: bob.hanna@afbini.gov.uk., Brennan GP; School of Biological Sciences, The Queen's University of Belfast, Belfast BT9 7BL, United Kingdom., Robinson MW; School of Biological Sciences, The Queen's University of Belfast, Belfast BT9 7BL, United Kingdom., Kajugu PE; Veterinary Sciences Division, Agri-Food and Biosciences Institute (AFBI), Stormont, Belfast BT4 3SD, United Kingdom., Quinn JM; Veterinary Sciences Division, Agri-Food and Biosciences Institute (AFBI), Stormont, Belfast BT4 3SD, United Kingdom.
Jazyk: angličtina
Zdroj: Veterinary parasitology [Vet Parasitol] 2024 Aug; Vol. 330, pp. 110244. Date of Electronic Publication: 2024 Jun 26.
DOI: 10.1016/j.vetpar.2024.110244
Abstrakt: Application of 'omics' technology, and advances in in vitro methods for studying the growth of Fasciola hepatica, have highlighted the central role of migrating neoblasts in driving forward development and differentiation towards the adult-like form. Neoblast populations present molecular heterogeneity, morphological variation and changes associated with recruitment of these stem cells into their final tissue locations. However, terminal differentiation towards function, has received much less attention than has been the case for the free-living Platyhelminths. An actively replicating neoblast population, comprising cells with heterochromatic nuclei consistent with regulation of gene expression, has been identified in the parenchyma of juvenile Fasciola gigantica migrating in the liver of experimentally infected mice. In some of these cells, early cytoplasmic differentiation towards myocyte function was noted. Neoblasts have also been identified close to, and incorporated in, the subtegumental zone, the gastrodermis and the excretory ducts. In these locations, progressive morphological differentiation towards terminal function has been described. This includes the appearance of specific progenitors of type-1, type-2 and type-3 tegumental cells, the latter possibly contributing to tegumental spine development. 'Cryptic' surface molecular differentiation is postulated to account for recognition and 'docking' of migrating neoblasts with their final site for terminal differentiation.
Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024. Published by Elsevier B.V.)
Databáze: MEDLINE
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