Light- and electron-microscopic studies of the pancreatic islet cells in the chicken under normal and experimental conditions

Mikami, Shin; Mutoh, Ken-ichiro

doi:10.1007/bf00331262

Cited by 38 publications

(22 citation statements)

References 46 publications

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“…Delta cells were observed in both islets, and were characterized by the presence of less dense spherical granules having a diameter of about 500 JIM (Figs. 3, 4), the same as the normal chicken pancreas (Mikami and Mutoh, 1971). …”

Section: Resultsmentioning

confidence: 99%

Intercalated Duct Cells in the Moorhen (Gallinula chloropus) Pancreatic Islet

Mutoh

Wakuri

Taniguchi

1999

Okajimas Folia Anatomica Japonica

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Summary: Intercalated duct cells are present in the alpha and beta islets of the moorhen pancreas. The intercalated duct cells adhere to each other via intercellular junctional complexes on the apical side, projecting many microvilli into the lumen. They also extend slender cytoplasmic processes between islet endocrine cells. These intercalated duct cells appear to have a stellate shape, and to wrap their cytoplasm around the endocrine cells. These observations suggest that intercalated ducts not only pass through the islets, but also play a role in support to islet cells.

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Section: Resultsmentioning

confidence: 99%

Intercalated Duct Cells in the Moorhen (Gallinula chloropus) Pancreatic Islet

Mutoh

Wakuri

Taniguchi

1999

Okajimas Folia Anatomica Japonica

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“…Although numerous reports have been made on the fine structure of the pancreatic islets of various species of vertebrates, only a few papers have been published on the pancreatic islets of birds, especially domestic fowl (MACHINO et al, 1966 a, b;PRZYBYLSKI, 1967;MACHINO and SAKUMA, 1968;MACHINO, 1970;PETER, 1970;MIKAMI and MUTOH, 1971;BENZO and GREEN, 1974). Since two types of pancreatic islets were distinguished by the light microscope, it has been possible to separate A islets, which consist mainly of A and D cells, from B islets, which consist mainly of B and D cells, by the electron microscope (MIKAMI and MUTOH, 1971).…”

Section: Discussionmentioning

confidence: 99%

“…Since two types of pancreatic islets were distinguished by the light microscope, it has been possible to separate A islets, which consist mainly of A and D cells, from B islets, which consist mainly of B and D cells, by the electron microscope (MIKAMI and MUTOH, 1971). BRAUN-BLANQUET (1969) reported, however, that the clear islet was composed of B cells surrounded by a mantle of A cells in the duck.…”

Section: Discussionmentioning

confidence: 99%

Fine Structure of the Pancreatic Islets in Domestic Fowl with Special Reference to the Cell Type and Secretion

Watanabe

Paik

Yasuda

1975

Arch. Histol. Jap., Arch. Histol. Jpn

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“…The insulin and glucagon hormones produce in the greatest amounts by beta and alpha cells which decrease and increase blood glucose levels, respectively. D cells release somatostatin which inhibit the release of glucagon and insulin hormones, but pancreatic polypeptide hormone produced by PP cells inhibits the exocrine pancreas secretions (10,12,14,15,19). The endocrine pancreas of the fowl is make up of small and large islets called alpha, beta and mixed islets (5,14).…”

Section: Introductionmentioning

confidence: 99%

Localization of insulin immunpositive cells and histochemical structure of the pancreas in falcons (Falco Anaumanni)

Şimşek¹,

Bayraktaroğlu²,

Altunay³

2009

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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Summary:The present study was conducted to determine the regional distribution of insulin immunpositive cells and histochemical structure of pancreas in falcon (Falco Anaumanni). Falcon pancreas was composed of three different parts as dorsal, ventral and splenic lobes. Those lobes contained acinar cells, pancreatic ducts, alpha, beta and mixed islets. Alpha islets were determined 3-4 unit as large islets in centre of the splenic lobe, but a few as small islets in dorsal and ventral lobes. Beta islets were widespread as small clusters in all lobes which were especially 7-8 units in periphery of the splenic lobe. Furthermore, mixed islets were found abundantly as small or large islets in all lobes. In the streptavidin biotin peroxidase staining of the pancreatic lobes, insulin immunpositive cells were numerous in the centre of beta islets, on the other hand these cells were detected as only one cell or 3-8 immunpositive cell groups in both alpha islets and exocrine tissue. In conclusion, the morphology and insulin immunpositive cells of pancreas in falcons are similar to duck, whereas are different from other avian species such as chicken, goose, and quail.Key words: Falcon, immunohistochemistry, insulin immunpositive cells, pancreas. Şahinlerde (Falco Anaumanni) pankreasın histokimyasal yapısı ve insülin immunpozitif hücrelerin lokalizasyonuÖzet: Bu çalışma, şahin (Falco Anaumanni) pankreasının histokimyasal yapısı ve insülin immunpozitif hücrelerin bölgesel dağılımını belirlemek için yapıldı. Şahin pankreası dorsal, ventral ve dalak lobu olarak 3 farklı lobdan oluşuyordu. Bu loplar asiner hücreler, akıtıcı kanallar, alfa, beta ve mix adacıkları içermekteydi. Alfa adacıkları dalak lobunun merkezinde 3-4 adet büyük adacık halinde gözlenirken, dorsal ve ventral lopta az sayıda küçük adacıklar halinde belirlendi. Beta adacıkları özellikle dalak lobunun periferinde 7-8 adet küçük adacıklar halinde bütün loplarda çok sayıda tespit edildi. Ayrıca, miks adacıklarının küçük ya da büyük adacıklar halinde pankreasın bütün loplarında çok yaygın bir şekilde bulunduğu saptandı. Pankreatik lobların streptavidin-biotin peroksidaz boyamalarında, insulin immunpozitif hücreler beta adacıkları merkezinde çok sayıdaydı diğer yandan bu hücreler hem alfa adacıklarında hem de ekzokrin dokuda yalnız tek bir hücre ya da 3-8 hücrelik gruplar halinde görüldü. Sonuç olarak şahin pankreasının morfolojik ve insulin pozitif hücreler açısından ördek pankreası ile benzer olduğu, tavuk, kaz ve bıldırcın gibi diğer kanatlı türlerinin pankreaslarından farklı olduğu tespit edilmiştir. Anahtar sözcükler: İmmunhistokimya, insulin pozitif hücreler, pancreas, şahin.

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Light- and electron-microscopic studies of the pancreatic islet cells in the chicken under normal and experimental conditions

Cited by 38 publications

References 46 publications

Intercalated Duct Cells in the Moorhen (Gallinula chloropus) Pancreatic Islet

Intercalated Duct Cells in the Moorhen (Gallinula chloropus) Pancreatic Islet

Fine Structure of the Pancreatic Islets in Domestic Fowl with Special Reference to the Cell Type and Secretion

Localization of insulin immunpositive cells and histochemical structure of the pancreas in falcons (Falco Anaumanni)

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