Blood cells of the gilthead seabream (Sparus aurata L.): Light and electron microscopic studies

Lopez‐Ruiz, Arnaldo; Esteban, M. Ángeles; Meseguer, José

doi:10.1002/ar.1092340203

Cited by 67 publications

(66 citation statements)

References 54 publications

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“…The acidophilic granulocytes of the testis showed the ultrastructural characteristics previously described for gilthead seabream head-kidney (Meseguer et al 1994) and blood (López-Ruiz et al 1992) acidophilic granulocytes. Clusters of acidophilic granulocytes were observed in the interstitial areas close to the germ cell cysts, in contact with the peritubular cells of the tubules and surrounded by collagen fibres in the post-spawning stage (Fig.…”

Section: Acidophilic Granulocytes Are Closed To the Germ Cells In Posmentioning

confidence: 71%

A role for acidophilic granulocytes in the testis of the gilthead seabream (Sparus aurata L., Teleostei)

Chaves-Pozo

Pelegrı́n²,

Mulero³

et al. 2003

Journal of Endocrinology

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In mammals, a complex interaction between the immune and the reproductive systems has been described, in which testicular immune cells produce cytokines and growth factors which modulate gonad functions, while specific gonad cells influence the immune response in this organ. In this study we describe the presence of acidophilic granulocytes in the testis of the hermaphrodite teleost fish gilthead seabream (Sparus aurata L.) by using a specific monoclonal antibody. During the post-spawning stage of the testis, this cell type appears in the germinal compartment, accumulates interleukin (IL)-1 and does not seem to be involved in the phagocytosis of degenerating cells. Moreover, in vitro, 11-ketotestosterone and 17 -oestradiol, the principal fish sexual steroids, regulate the respiratory burst activity of acidophilic granulocytes obtained from the head-kidney (the bone marrow equivalent in fish) and the intracellular accumulation of IL-1 by these cells. It is likely, therefore, that IL-1 produced by testicular acidophilic granulocytes regulates important functions of the testis in fish.

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Section: Acidophilic Granulocytes Are Closed To the Germ Cells In Posmentioning

confidence: 71%

A role for acidophilic granulocytes in the testis of the gilthead seabream (Sparus aurata L., Teleostei)

Chaves-Pozo

Pelegrı́n²,

Mulero³

et al. 2003

Journal of Endocrinology

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“…Accordingly, the perivascular position of many leukocyte types is associated to their regulatory function during inflammatory responses (Mekori, 2004;Mulero et al 2007;Dezfuli et al 2012a). Some examples of cellular innate responses to piscine myxosporeans are documented, such as the neutrophil and eosinophil-like infiltration during gill inflammation in channel catfish infected with Henneguya spp., whose degranulation within lesions was associated with further host tissue damage (Lovy et al 2011). Furthermore, the time-dependent succession of granulocytes and lymphocytes in the oedemata surrounding Myxobolus pendula branchial cysts was described in creek chub (Martyn et al 2002).…”

Section: Discussionmentioning

confidence: 99%

Modulation of leukocytic populations of gilthead sea bream (Sparus aurata) by the intestinal parasite Enteromyxum leei (Myxozoa: Myxosporea)

et al. 2013

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S U M M A R YThe cellular mucosal and systemic effectors of gilthead sea bream (GSB) (Sparus aurata) involved in the acute immune response to the intestinal parasite Enteromyxum leei were studied in fish experimentally infected by the anal route. In the intestinal inflammatory infiltrates and in lymphohaematopoietic organs (head kidney and spleen) of parasitized fish, the number of plasma cells, B cells (IgM immunoreactive) and mast cells (histamine immunoreactive) were significantly higher, whereas the number of acidophilic granulocytes (G7 immunoreactive) decreased, compared with non-parasitized and unexposed fish. These differences were stronger at the posterior intestine, the main target of the parasite, and no differences were found in the thymus. In non-parasitized GSB, the percentage of splenic surface occupied by melanomacrophage centres was significantly higher. These results suggest that the cellular response of GSB to E. leei includes proliferation of leukocytes in lymphohaematopoietic organs and recruitment into intestines via blood circulation involving elements of innate and adaptive immunity. Acidophilic granulocytes and mast cells presented opposite patterns of response to the parasite infection, with an overall depletion of the former and an increased amount of the latter. Some differences between both cell types were also detected in regard to their granule density and cell morphology.

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“…They appear as round, oval, ellipsoidal (spindled), or spiked cells with occasional scarce thin, long cell processes (Janzarik, 1981;Wood and Ebanks, 1984;Doggett and Harris, 1989;López Ruiz et al, 1992;Esteban et al, 2000). Their nucleus shows characteristic large heterochromatin blocks.…”

Section: Thrombocytesmentioning

confidence: 97%

Are thrombocytes and platelets true phagocytes?

Meseguer¹,

Esteban²,

Rodrı́guez³

2002

Microscopy Res & Technique

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Thrombocytes and platelets, beyond their primary function in hemostasis, seem to play an active role in inflammation. As regards their phagocytic ability, the results to date are confusing, incomplete, and somewhat contradictory. Whereas the interaction of avian thrombocytes or mammalian platelets with bacteria both in vitro and in vivo has received wide attention, almost no information exists on the topic in "lower" vertebrates. The aim of this work is to review the available information on the phagocytic properties of thrombocytes and platelets. Particular attention is payed to the ontogeny of these cells, the soluble factors involved in the inflammatory process derived from them, and their interaction with particulate material, mainly with bacteria.

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Blood cells of the gilthead seabream (Sparus aurata L.): Light and electron microscopic studies

Cited by 67 publications

References 54 publications

A role for acidophilic granulocytes in the testis of the gilthead seabream (Sparus aurata L., Teleostei)

A role for acidophilic granulocytes in the testis of the gilthead seabream (Sparus aurata L., Teleostei)

Modulation of leukocytic populations of gilthead sea bream (Sparus aurata) by the intestinal parasite Enteromyxum leei (Myxozoa: Myxosporea)

Are thrombocytes and platelets true phagocytes?

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