Ontogeny of the endocrine pancreas in sea bass (Dicentrarchus labrax)

Hernández, M. P. García; Agulleiro, B.

doi:10.1007/bf00328018

Cited by 27 publications

(4 citation statements)

References 77 publications

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“…Thus, the osteoglossomorphs share the common feature of other teleosts of having two types of D-cells in the pancreatic islets. The immunoreactivity to both anti-SST-14 and anti-SST-25 in D1-cells of the osteoglossomorph islet organ is consistent with that reported for D1-cells in the developing and mature islet organ of sea bass (Lozano et al, 1991a;Garcia-Hernandez and Agulleiro, 1992). Moreover, similar coexistence was reported in the stomach of Sparus aurata (Elbal et al, 1991).…”

Section: Discussionsupporting

confidence: 88%

“…Gene I encodes for a preprosomatostatin that will be processed to give SST-28 and/or SST-14 I, whereas gene II encodes for a preprosomatostatin that will be processed to give either a 28-residue peptide or a 25residue peptide with SST-14 II (Tyr 7 , Gly 10 ). Many teleosts (anglerfish, coho salmon, rainbow trout, sea bass, and turbot) have two distinct D-cell types immunoreactive to either SST-14 or SST-25 antisera (McDonald et al, 1987;Nozaki et al, 1988;Lozano et al, 1991a;Abad et al, 1992;Garcia-Hernandez and Agulleiro, 1992;Reinecke et al, 1997). Furthermore, the separate subpopulations of islet cells of these teleosts have different anatomical relationships with other cell types in the islet, mainly SST-14 containing D2-cells near central B-cells and SST-25 containing D1-cells at the periphery (Agulleiro et al, 1993;Reinecke et al, 1997).…”

Section: Discussionmentioning

confidence: 99%

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Ultrastructure and Immunocytochemistry of the Islet Organ of Osteoglossomorpha (Teleostei)

Al‐Mahrouki

Youson

1999

General and Comparative Endocrinology

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Both routine electron microscopy and immunocytochemistry with protein A-gold were used to identify the cell types within the islet organs of four species of teleosts (Osteoglossum bicirrhosum, Pantodon buchholzi, Notopterus chitala, and Gnathonemus petersii) within Osteoglossomorpha, a subdivision with an ancient lineage. Four primary endocrine cell types, A, B, D, and F, were identified within the islets of the four species examined. The B- and D-cells were located mainly in the central core of the islet in the four species. In general, the A-cells were located at the islet periphery in all of the four species but in P. buchholzi and N. chitala they were also differently distributed toward the islet core. F-cells were present only at the islet periphery. Granules of B-cells in three species had a relatively homogeneous shape of the matrix core, but in O. bicirrhosum, the shape varied greatly. Variation in matrix shape of B-cell granules may indicate a different conformation of insulin molecules among at least some species of osteoglossomorphs, and this observation may have some taxonomic significance. Two somatostatin-containing (SST) D-cell types (D1 and DX) with granules of different shape were observed in all four species of osteoglossomorphs. The granules of the two D-cells immunostained either with anti-SST-25 and anti-SST-14 (D1-cells) or with anti-SST-34 (DX-cells). Immunocytochemistry confirmed that A-cells, containing glucagon-family peptides, and F-cells, containing peptides of the pancreatic polypeptide family, had granules of different shape. The cells of the islet organs of these osteoglossomorphs are more similar to those in more derived teleosts than they are to those of nonteleost actinopterygians.

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Section: Discussionsupporting

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Ultrastructure and Immunocytochemistry of the Islet Organ of Osteoglossomorpha (Teleostei)

Al‐Mahrouki

Youson

1999

General and Comparative Endocrinology

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“…In turbot islets, SOM‐25‐IR cells occurred in the periphery and SOM‐14 immunoreactive cells in the center, which agrees with results obtained in other bony fish species. 1 Thus, the presence of two different forms of SOM in separate subpopulations of islet cells may be common to teleosts. In developing and adult turbot stomach and intestine, however, identical endocrine cells reacted with both antisera as has been observed also in stomach of adult Dicentrarchus labrax .…”

Section: Distribution and Relative Frequency Of Endocrine Cells Durinmentioning

confidence: 99%

“…Prominent amongst these is the endocrine GEP system, but only few data exist on its development. 1,2 Thus, we investigated the ontogeny of insulin (INS), glucagon (GLUC), somatostatin (SOM), pancreatic polypeptide (PP) and insulin‐like growth factor I (IGF‐I) using turbot ( Scophthalmus maximus ) larvae aging from the first day after hatching until the juvenile adult stage, as representatives. The results obtained are summarized in Table 1.…”

Section: Distribution and Relative Frequency Of Endocrine Cells Durinmentioning

confidence: 99%

Ontogeny of the Classical Islet Hormones and IGF‐I in the Gastro‐Entero‐Pancreatic (GEP) System of the Turbot, Scophthalmus maximus (Teleostei)^a

Reinecke

1998

Annals of the New York Academy of Sciences

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Development of the islets, exocrine pancreas, and related ducts in the Nile tilapia, Oreochromis niloticus (Pisces: Cichlidae)

Morrison

Pohajdak

Tam

et al. 2004

Journal of Morphology

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Pancreatic development and the relationship of the islets with the pancreatic, hepatic, and bile ducts were studied in the Nile tilapia, Oreochromis niloticus, from hatching to the onset of maturity at 7 months. The number of islets formed during development was counted, using either serial sections or dithizone staining of isolated islets. There was a general increase in islet number with both age and size. Tilapia housed in individual tanks grew more quickly and had more islets than siblings of the same age left in crowded conditions. The pancreas is a compact organ in early development, and at 1 day posthatch (dph) a single principal islet, positive for all hormones tested (insulin, SST-14, SST-28, glucagon, and PYY), is partially surrounded by exocrine pancreas. However, the exocrine pancreas becomes more disseminated in older fish, following blood vessels along the mesenteries and entering the liver to form a hepatopancreas. The epithelium of the pancreatic duct system from the intercalated ducts to the main duct entering the duodenum was positive for glucagon and SST-14 in 8 and 16 dph tilapia. Individual insulin-immunopositive cells were found in one specimen. At this early stage in development, therefore, the pancreatic duct epithelial cells appear to be pluripotent and may give rise to the small islets found near the pancreatic ducts in 16-37 dph tilapia. Glucagon, SST-14, and some PPY-positive enteroendocrine cells were present in the intestine of the 8 dph larva and in the first part of the intestine of the 16 dph juvenile. Glucagon and SST-14-positive inclusions were found in the apical cytoplasm of the mid-gut epithelium of the 16 dph tilapia. These hormones may have been absorbed from the gut lumen, since they are produced in both the pancreatic ducts and the enteroendocrine cells. At least three hepatic ducts join the cystic duct to form the bile duct, which runs alongside the pancreatic duct to the duodenum.

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Ontogeny of the endocrine pancreas in sea bass (Dicentrarchus labrax)

Cited by 27 publications

References 77 publications

Ultrastructure and Immunocytochemistry of the Islet Organ of Osteoglossomorpha (Teleostei)

Ultrastructure and Immunocytochemistry of the Islet Organ of Osteoglossomorpha (Teleostei)

Ontogeny of the Classical Islet Hormones and IGF‐I in the Gastro‐Entero‐Pancreatic (GEP) System of the Turbot, Scophthalmus maximus (Teleostei)^a

Development of the islets, exocrine pancreas, and related ducts in the Nile tilapia, Oreochromis niloticus (Pisces: Cichlidae)

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Ontogeny of the endocrine pancreas in sea bass (Dicentrarchus labrax)

Cited by 27 publications

References 77 publications

Ultrastructure and Immunocytochemistry of the Islet Organ of Osteoglossomorpha (Teleostei)

Ultrastructure and Immunocytochemistry of the Islet Organ of Osteoglossomorpha (Teleostei)

Ontogeny of the Classical Islet Hormones and IGF‐I in the Gastro‐Entero‐Pancreatic (GEP) System of the Turbot, Scophthalmus maximus (Teleostei)a

Development of the islets, exocrine pancreas, and related ducts in the Nile tilapia, Oreochromis niloticus (Pisces: Cichlidae)

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Ontogeny of the Classical Islet Hormones and IGF‐I in the Gastro‐Entero‐Pancreatic (GEP) System of the Turbot, Scophthalmus maximus (Teleostei)^a