The epithelium of the gastro‐intestinal tract of <i>Polypterus senegalus</i> (Pisces:Brachiopterygii)

Magid, A. M. Abdel

doi:10.1002/jmor.1051460403

Cited by 14 publications

(5 citation statements)

References 9 publications

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“…Histologically, our results are in agreement with several studies [ 78 , 79 , 80 ], showing in the analyzed intestines the presence of a consistent mucosa, organized in crests, with numerous goblet cells and well-defined enterocytes, a submucosa, a muscularis, and a serosa. AB/PAS histochemical staining also allowed us to identify different mucopolysaccharide components, especially acidic mucins in blue and neutral mucins in magenta, as already reported in a previous article [ 81 ].…”

Section: Discussionsupporting

confidence: 93%

Confocal Characterization of Intestinal Dendritic Cells from Myxines to Teleosts

Alesci

Capillo

Fumia

et al. 2022

Biology

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Dendritic cells (DCs) are antigen-presenting cells (APCs) that regulate the beginning of adaptive immune responses. The mechanisms of tolerance to antigens moving through the digestive tract are known to be regulated by intestinal DCs. Agnatha and Gnathostoma are descendants of a common ancestor. The Ostracoderms gave rise to Cyclostomes, whereas the Placoderms gave rise to Chondrichthyes. Sarcopterygii and Actinopterygii are two evolutionary lines of bony fishes. Brachiopterygii and Neopterygii descend from the Actinopterygii. From Neopterygii, Holostei and Teleostei evolved. Using immunohistochemistry with TLR-2, Langerin/CD207, and MHC II, this study aimed to characterize intestinal DCs, from myxines to teleosts. The findings reveal that DCs are positive for the antibodies tested, highlighting the presence of DCs and DC-like cells phylogenetically from myxines, for the first time, to teleosts. These findings may aid in improving the level of knowledge about the immune system’s evolution and these sentinel cells, which are crucial to the body’s defense.

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Section: Discussionsupporting

confidence: 93%

Confocal Characterization of Intestinal Dendritic Cells from Myxines to Teleosts

Alesci

Capillo

Fumia

et al. 2022

Biology

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“…Although MAGID (1975) has described a gradual transition on the epithelium from the esophagus to the stomach in Polypterus senegalus (Curvier, 1829), the abrupt transition observed in T. brasiliensis was also described for Pimelodus maculatus (GODINHO et at. 1970), Pimelodus albicans (PIGNALBERI et at.…”

Section: Discussionmentioning

confidence: 92%

Microscopic morphology and histochemistry of the digestive system of a tropical freshwater fish Trichomycterus brasiliensis (Lütken) (Siluroidei, Trichomycteridae)

Ribeiro

Fanta

2000

Rev. Bras. Zool.

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The digestive system of Trichomycterus brasiliensis (Lütken, 1874), a small sized tropical Teleostean fish widely distributed in South America, was studied. Tissue samples were prepared for light and scanning electron microscopy (SEM). Trichomycterus brasiliensis shows stratified esophagus epithelium with taste buds and goblet cells with neutral and acid mucus at the anterior region. The stomach is caecal, presenting a pyloric valve with neutral mucus cells. At the terminal portion it is surrounded by a thick muscular wall. The intestine shows two loops; the epithelium is single columnar, with acid and neutral mucus in goblet cells. Multicellular intestinal glands are absent. Granular cells are often seen in the mucosa, less in the submucosa but were not observed in the muscularis. After the intestine-rectal valve, the rectum shows lower mucosal folds, more goblet cells and a thicker muscularis. No lobes were observed at the liver. Small regions of pancreatic tissue may be identified within the hepatic tissue mainly surrounding vessels and ducts. A compact pancreas may also be observed ventrally to the stomach and covering the bile duct. The possible significance of the heterogeneous character of the digestive tube mucosubstances is discussed. The digestive system of T. brasiliensis presents structural characteristics of a predator fish

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“…Em Pseudoplatystoma coruscans o esôfago apresenta-se como um órgão tubular curto de diâmetro relativamente uniforme, semelhante ao encontrado em Salmo trutta (BURNSTOCK, 1959) e em Pimelodus maculatus (GODINHO, 1967) diferindo-se de alguns poucos nos quais o esôfago apresenta-se longo, como em Dorosoma cepedianum (SCHMITZ;BAKER, 1969), Chelmon rostratus (TAN;TEH, 1974), Polypterus senegalus, (MAGID, 1975) e Plecostomus commersonii (BORGES, 1981).…”

Section: Discussionunclassified

Histologia do trato digestório do surubim-pintado (Pseudoplatystoma coruscans - Agassiz, 1829)

Cal¹

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The epithelium of the gastro‐intestinal tract of Polypterus senegalus (Pisces:Brachiopterygii)

Cited by 14 publications

References 9 publications

Confocal Characterization of Intestinal Dendritic Cells from Myxines to Teleosts

Confocal Characterization of Intestinal Dendritic Cells from Myxines to Teleosts

Microscopic morphology and histochemistry of the digestive system of a tropical freshwater fish Trichomycterus brasiliensis (Lütken) (Siluroidei, Trichomycteridae)

Histologia do trato digestório do surubim-pintado (Pseudoplatystoma coruscans - Agassiz, 1829)

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