Lymphoid organs in sturgeons (Acipenseridae)

Fänge, Ragnar

doi:10.1016/0165-2427(86)90119-4

Cited by 61 publications

(60 citation statements)

References 9 publications

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“…This apparent discrepancy is probably due to the fact that only large sturgeons were included in later studies. The histological findings in old sturgeons (Scatizzi, 1933;Fange, 1986) match those presented here in the oldest specimens examined, when the tissue is atrophic and appears infiltrated with lymphocytes. Our findings suggest that the sturgeon subepicardium is implicated in both the establishment and the maintenance of the immune responses in sturgeons.…”

Section: Discussionsupporting

confidence: 81%

“…However, we have not found structural evidence that may suggest that the subepicardium is a site of erythrocyte or platelet production. The sturgeon subepicardium is described in other reports to contain lymph node-like structures (Fange, 1986). This apparent discrepancy is probably due to the fact that only large sturgeons were included in later studies.…”

Section: Discussionmentioning

confidence: 90%

“…The atrophy of the subepicardial tissue by the time the sturgeons reach sexual maturation is another similarity with the thymus. Atrophy of the thymic tissue and fat infiltration occurs in many fish groups (Fange, 1986), and in higher vertebrates with age.…”

Section: Discussionmentioning

confidence: 99%

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The structure of the conus arteriosus of the sturgeon (Acipenser naccarii) heart: II. The myocardium, the subepicardium, and the conus‐aorta transition

et al. 2002

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Sturgeons constitute a family of living "fossil" fish whose heart is related to that of other ancient fish and the elasmobranches. We have undertaken a systematic study of the structure of the sturgeon heart aimed at unraveling the relationship between the heart structure and the adaptive evolutionary changes. In a related paper, data were presented on the conus valves and the subendocardium. Here, the structure of the conus myocardium, the subepicardial tissue, and the conus-aorta transition were studied by conventional light, transmission, and scanning electron microscopy. In addition, actin localization by fluorescent phalloidin was used. The conus myocardium is organized into bundles whose spatial organization changes along the conus length. The variable orientation of the myocardial cell bundles may be effective in emptying the conus lumen during contraction and in preventing reflux of blood. Myocardial cell bundles are separated by loose connective tissue that contains collagen and elastin fibers, vessels, and extremely flat cells separating the cell bundles and enclosing blood vessels and collagen fibers. The ultrastructure of the myocardial cells was found to be very similar to that of other fish groups, suggesting that it is largely conservative. The subepicardium is characterized by the presence of nodular structures that contain lympho-hemopoietic (thymus-like) tissue in the young sturgeons and a large number of lymphocytes after the sturgeons reach sexual maturity. This tissue is likely implicated in the establishment and maintenance of the immune responses. The intrapericardial ventral aorta shows a middle layer of circumferentially oriented cells and internal and external layers with cells oriented longitudinally. Elastin fibers completely surround each smooth muscle cell, and the spaces between the different layers are occupied by randomly arranged collagen bundles. The intrapericardial segment of the ventral aorta is a true transitional segment whose structural characteristics are different from those of both the conus subendocardium and the rest of the ventral aorta. Anat Rec 268: 388 -398, 2002.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 90%

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The structure of the conus arteriosus of the sturgeon (Acipenser naccarii) heart: II. The myocardium, the subepicardium, and the conus‐aorta transition

et al. 2002

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“…Thymi in sturgeons persist until the fish reach sexual maturity. Later, these undergo age-related atrophy (Fange 1986).…”

mentioning

confidence: 99%

“…The cortex is predominantly composed of closely packed lymphocytes. The medulla is composed of sparsely organised lymphocytes, macrophages, reticular cells and Hassall's corpuscles that have a disperse distribution (Fange 1986;Petrie-Hanson and Peterman 2005;Peterman and Petrie-Hanson 2006). …”

mentioning

confidence: 99%

The first finding of Hassall's corpuscles in the thymi of cultured sturgeons

Šálková¹,

Flajšhans²

2016

Vet. Med. - Czech

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Histological examination of thymi from juvenile Acipenser ruthenus and Acipenser brevirostrum after haematoxylin and eosin staining revealed the presence of Hassall's corpuscles, in a scattered distribution within the thymic medulla in two of seven, and one of nine examined specimens, respectively. Morphologically, the Hassall's corpuscles were of the juvenile and premature type and no degenerative changes were seen.

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Immune Defences of Teleost Fish

Foey

Picchietti

2014

Aquaculture Nutrition

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Teleost fish have a well-established innate immune response that is vital for anti-pathogen responses in their antigen-rich environment. With the increase in scientific investigations and the availability of specific reagents, it is clear that these fish also possess pathogen/antigen-specific adaptive responses. These responses are comparable to those of higher organisms, responding to intracellular and extracellular resident pathogens, initiating cell-mediated immunity (CMI) and humoral defences, respectively. This chapter reviews the current understanding of teleost immunity, with particular emphasis on the tissues involved in immune development (thymus, head kidney and spleen) and those under most antigenic stimulation -the skin and mucosal surfaces. In this context, an understanding of teleost immune defences is important for our comprehension of the health benefits conferred by prebiotics and probiotics introduced in feed formulations.

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Lymphoid organs in sturgeons (Acipenseridae)

Cited by 61 publications

References 9 publications

The structure of the conus arteriosus of the sturgeon (Acipenser naccarii) heart: II. The myocardium, the subepicardium, and the conus‐aorta transition

The structure of the conus arteriosus of the sturgeon (Acipenser naccarii) heart: II. The myocardium, the subepicardium, and the conus‐aorta transition

The first finding of Hassall's corpuscles in the thymi of cultured sturgeons

Immune Defences of Teleost Fish

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