Responses of mucus-producing cells in gill disease of rainbow trout (Oncorhynchus mykiss)

Ferguson, H. W.; Morrison, Diane; Ostland, V. E.; Lumsden, John S.; Byrne, Philip

doi:10.1016/0021-9975(92)90054-x

Cited by 55 publications

(35 citation statements)

References 21 publications

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“…The groups with a significantly fewer number of mucous cells also had an increased ratio of AB.2-positive to AB.2-negative cells, indicating a relative increase in skin mucous cells containing acid glycoproteins (Ferguson et al 1992). In contrast, Iger et al (1994) reported an increase of mucous granules with more neutral glycoproteins in the skin of rain bow trout exposed to acid water.…”

Section: Discussionmentioning

confidence: 92%

Responses of skin mucous cells to aluminium exposure at low pH in Atlantic salmon (Salmo salar) smolts

Berntssen¹,

Kroglund²,

Rosseland³

et al. 1997

Can. J. Fish. Aquat. Sci.

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Atlantic salmon (Sahtio salar) smolts were exposed for 80 h to seven water qualities: pH 5.6 with 31 and 46 |ig labile AI L-1, pH 6.0 with 18 and 24 jig labile AI L-1, and pH 6.2 with 12 and 18 jig labile AI L-1 and control water at pH 6.8 and <10 fig labile AI L-1. The three groups with the highest concentrations of labile A1 (31 and 46 jig labile AI L-1 at pH 5.6 and 24 jig labile AI L-1 at pH 6.0) suffered high mortalities and showed a disturbance in osmoregulation and a massive secretion of mucus, as seen from a decrease in number of skin mucous cells. Furthermore, an increase in skin mucous cells containing acidic mucosubstances was observed. The loss of plasma chloride and skin mucous cells showed a significant linear correlation (R2 = 0.68,/? < 0.001). The increased secretion of mucus on skin and gills and the increase in acidity of mucosubstances are consistent with their prior presumed defensive role in binding of Al. Résumé

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Section: Discussionmentioning

confidence: 92%

Responses of skin mucous cells to aluminium exposure at low pH in Atlantic salmon (Salmo salar) smolts

Berntssen¹,

Kroglund²,

Rosseland³

et al. 1997

Can. J. Fish. Aquat. Sci.

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“…Manjili et al (1998) showed that hyperplasic goblet cell and changes in the composition of goblet cell mucins follow primary infection of guinea pigs with Trichostrongylus colubriformis. In fish, an excess of secreted mucus is generally described when both intestinal and gill epithelia interact with microrganisms (Ferguson et al 1992, Guzman-Murillo et al 2000, Lodemel et al 2001, Kruatrachue et al 2003, and with intestinal helminths (George & Nadakal 1978, AdelMeguid et al 1995.…”

Section: Discussionmentioning

confidence: 99%

Histochemistry of glycoconjugates in mucous cells of Salmo trutta uninfected and naturally parasitized with intestinal helminths

Bosi¹,

Arrighi²,

Giancamillo³

et al. 2005

Dis. Aquat. Org.

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Mucus secreted onto the surface of the intestine forms a physical barrier to invading parasites so that a possible attachment of helminths to the surface is prevented and their expulsion by peristalsis facilitated. In mammals, intestinal parasites induce hyperplasia and hypertrophy of intestine goblet cells and provoke changes in the mucus composition. In fish, this topic has received less attention. In the present investigation, histochemical methods were employed to compose intestinal mucous cell numbers and their glycoconjugate composition were compared by uninfected brown trout Salmo trutta and in S. trutta parasitized with Cyathocephalus truncatus or Pomphorhynchus laevis. When P. laevis was present in the intestine of the brown trout, the total mucous cell number, and the number of mucous cells containing acid or mixed glycoconjugates were significantly enhanced. No significant change in the total mucous cell number was detected in the intestine of fish parasitized with C. truncatus in comparison with uninfected brown trout. A significant increase was observed in the number of both acid (especially sulphated) and mixed glycoconjugates containing mucous cells as well as a significant decrease in the number of neutral glycoconjugates containing mucous cells. When intestinal helminths were present, the thickness of the adherent mucous gel increased. In a limited number of other fish species, the occurrence of gill and intestinal parasites has been reported to increase the mucosal glycoconjugate secretions. Our study is the first quantitative report on the effects of intestinal helminths on the density of mucous cells and mucus composition in a fish species. KEY WORDS: Glycoconjugates · Mucus composition · Mucous cell number · Intestinal parasites · Brown troutResale or republication not permitted without written consent of the publisher

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“…The second event is an increase in electron density of the m ucosom es, reflecting an alteration in the nature of the mucus being secreted (Blackstock and Pickering 1980;Pickering and Fletcher 1987), and may indicate an enhanced protective capacity against micro organism s (Fletcher and W hite 1973;Fletcher 1981;Kraehenbuhl and N eutra 1992). This phenom enon has been reported previously in other species challenged by environmental influences (Ferguson et al 1992;Iger and W endelaar Bonga 1994). For instance, the effects of ectoparasitic infestation on the m ucous cells of the brown trout (Pickering and Fletcher 1987), bear a striking resem blance to the change in m ucosom e electron density brought about by environmental acidification in the present study.…”

Section: Discussionmentioning

confidence: 56%

Skin ultrastructure in relation to prolactin and MSH function in rainbow trout (Oncorhynchus mykiss) exposed to environmental acidification

et al. 1995

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tract. The present study describes the effects of 14 s exposure to acidified (pH 4.0) soft water in the ab-:e of alum inium , on the ultrastructure of the skin in bow trout {O ncorhynclius m ykiss). Com pared to confish. there was a moderate increase in the incidence îecrosis in the filament cells of the fish exposed to pH but since the integrity of the tissue appeared to be ntained, most of the ultrastuctural changes observed C ' y be considered to be adaptive. There was an increase pidermal thickness, a higher frequency of electronse vesicles in filament cells, an increase in the unduon of the basal lamina, and the penetration of the epiinis by cytoplasm atic processes of m elanocytes in 1-exposed specimens. An infiltration of leucocytes in itie epidermis, and the appearance of serous m ucous Is, was also evident. W hether these events were under control of prolactin and/or a-M S H , was also in v e st ed, but no indication for activation or inhibition of 1er prolactin or tf-M SH producing cells was obtained, ce a previous study (Balm and Pöttinger 1993) had nonstrated that plasma cortisol levels were also idenil in control and low pH treated trout throughout a 14 experimental period, it is concluded that under conions of environmental acidification, the integument onom ically maintains the adjustm ents necessary for cessful acclim ation, presum ably via paracrine regulay circuits.

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Responses of mucus-producing cells in gill disease of rainbow trout (Oncorhynchus mykiss)

Cited by 55 publications

References 21 publications

Responses of skin mucous cells to aluminium exposure at low pH in Atlantic salmon (Salmo salar) smolts

Responses of skin mucous cells to aluminium exposure at low pH in Atlantic salmon (Salmo salar) smolts

Histochemistry of glycoconjugates in mucous cells of Salmo trutta uninfected and naturally parasitized with intestinal helminths

Skin ultrastructure in relation to prolactin and MSH function in rainbow trout (Oncorhynchus mykiss) exposed to environmental acidification

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