The enigmatic thymic myoid cells – their 130 years of history, embryonic origin, function and clinical significance

Varga, Ivan; Bódi, Ildikó; Kachlík, David; Mestanova, Veronika; Klein, Martin

doi:10.2478/s11756-019-00214-1

Cited by 5 publications

(2 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering that the gill and thymic epithelia derive from the pharyngeal pouches, it could be possible that a similar differentiation towards a myoid pattern occurs by the stem cells in the gill epithelium. The biological roles of these myoid cells in the thymus are not yet clear (Varga et al ., 2019). Although several hypotheses have been made for these cells, the authors will highlight two of them: (a) the release of several biologically active substances (probably cytokines) in their environment that stimulate the growth and proliferation of macrophages and lymphocytes (Kamo et al ., 1985), and (b) the function as myoblasts and the ability to regenerate postnatal skeletal muscle when thymic myoid cells are found in vitro (Pagel et al ., 2000).…”

Section: Discussionmentioning

confidence: 99%

Section: Gill Epitheliummentioning

confidence: 99%

See 1 more Smart Citation

Gill morphology and morphometry of the facultative air‐breathing armoured catfish, Corydoras paleatus, in relation on aquatic respiration

Plaul

Díaz

Barbeito

2021

Journal of Fish Biology

View full text Add to dashboard Cite

The Neotropical armoured catfish Corydoras paleatus is a facultative air‐breathing teleost commonly exported as ornamental fish. In this species, air breathing enables it to survive and inhabit freshwater environments with low oxygen levels. Therefore, it is important to analyse the gills from a morphological aspect and its dimensions in relation to body mass with reference to aquatic respiration. For that, the gills were analysed using a stereoscopic microscope for morphometric studies, and structural and ultrastructural studies were carried out to compare the four branchial arches. Furthermore, two immunohistochemical techniques were used to locate and identify the presence of a Na+/K+ pump. The characterization of the potential for cell proliferation of this organ was assessed using an anti‐PCNA antibody. The results show that gills of C. paleatus present some characteristics related to its diet and lifestyle, such as the limited development of gill rakers and the abundance of taste buds. In addition, other special features associated with the environment and bimodal breathing were observed: scarce and absent mucous cells (MCs) in the gill filaments and branchial lamellae, respectively, and the localization of mitochondria‐rich cells (MRCs) covering the basal third of the branchial lamellae, which reduces the gill respiratory area. A peculiar finding in the gill epithelium of this armoured catfish was the presence of mononuclear cells with sarcomeres similar to myoid cells, whose functional importance should be determined in future studies. Finally, in C. paleatus, the interlamellar space of gill filaments is an important site for cell turnover and ionoregulation; the latter function is also performed by the branchial lamellae.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Gill Epitheliummentioning

confidence: 99%