Electron microscopic study of the liver of Tilapia nilotica exposed to neopybuthrin

El-Elaimy, Ibrahim A.; Sakr, Saber A.; El-Saadany, M. M.; Gabr, S. A.

doi:10.1007/bf00194662

Cited by 5 publications

(4 citation statements)

References 10 publications

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“…This migration of the exocrine pancreas appears to continue throughout much of the lifespan of the tilapia. In adult tilapia (El-Elaimy et al, 1993), exocrine pancreas is scattered throughout the liver in association with branches of the portal vein and has been referred to as a hepatopancreas. In fact, in very old tilapia weighing several kilograms this process has occurred to such an extent that there is often very little residual exocrine pancreas associated with Brockmann bodies, as the bulk of it is found adjacent to intrahepatic portal vein branches (pers.…”

Section: Discussionmentioning

confidence: 99%

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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Section: Discussionmentioning

confidence: 99%

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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“…Whatever the reason for this increase, it was emphasized in a study that this increase indicated hydroxylation enzymes for the hydrolysis of chemical causing increase and high levels protein synthesis to meet the demand of specific immune defense system and exhibited pathological situation of the cell [23] . In a study an increase in the number of mitochcondria in the cells of mice and fish livers was attributed to some chemicals (SB and neopybutrin), and this condition was stated to be due to the increasing energy requirement of the cells [5,24] .…”

Section: Effects Of the Food Additive Sodium Benzoate On Developing Chicken Livermentioning

confidence: 99%

Effects of the Food Additive Sodium Benzoate on Developing Chicken Liver

Koca¹,

Karakahya²

2015

CFD

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Abstract. In this study, the effects of sodium benzoate (E-211) (SB) on the liver tissues of chicken embryos which were exposed to different doses of SB and for different durations were histopathologically investigated. SB was injected into vitellus at three different doses (250, 500, 1000 mg/kg) on the 5 th day of the incubation. The embryos of the control and experimental groups were collected on the 7 th day (stage 31) and 10 th day (stage 36) of incubation and weighed. It was statistically detected that SB caused rise to a significant decrease (P<0.001) on the total weights of the embryos depending in the dose and duration. At microscopic level deterioration of vein structures, congestion, edema, sinusoidal dilation, deterioration of hepatocyte arrangements, swelling, vacuolization, chromatin condensation, karyolysis, shape deformation and eccentric located of the nuclei decrease in Nuclear Organization Regions (NOR) and mitotic division, stickiness of chromosomes, anaphase bridge, nuclei budding and the formation of micronuclei were observed.

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“…Originally from the Ivory Coast in Africa, it was brought to Pentecoste in the state of Ceará in Brazil by the National Department for Drought Prevention -Departamento Nacional de Obras Contra a Seca (D.N.O.C.S) (Castagnolli, 1992). The normal Nile tilapia liver is composed of hexagonal hepatic cells, with a centrally or excentrally located nucleus and homogenous cytoplasm (El-Elaimy et al, 1993). The exocrine pancreatic tissue in this fish is generally found inside the hepatic tissue and located around the blood vessels; therefore the liver is referred to as the hepatopancreas (El-Elaimy et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

“…The normal Nile tilapia liver is composed of hexagonal hepatic cells, with a centrally or excentrally located nucleus and homogenous cytoplasm (El-Elaimy et al, 1993). The exocrine pancreatic tissue in this fish is generally found inside the hepatic tissue and located around the blood vessels; therefore the liver is referred to as the hepatopancreas (El-Elaimy et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Bioactivity of crude ethanol extract and fractions of Eugenia uniflora (Myrtaceae) in the hepatopancreas of Oreochromis niloticus L

Fiuza¹,

Silva²,

Paula

et al. 2009

Biol. Res.

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This study evaluates the bioactivity of the crude ethanol extract and ethyl acetate, hexane and chloroform fractions obtained from Eugenia uniflora leaves using the hepatopancreas of Oreochromis niloticus L. as an experimental model. The ethanol extract and fractions were administered to the fish orally with their feed. Twenty-four hours later, the fish were sacrificed and their livers dissected, fixed in neutral formalin, embedded in paraffin and sectioned. Histological analyses were performed using Masson's trichrome and Haematoxylin-Eosin. Histochemical studies were performed using Feulgen, PAS (Periodic Acid Schiff) and PAS + salivary amylase and Sudan IV stain. The qualitative analysis of the material showed that the crude extract and the ethyl, chloroform and hexane fractions induced vasodilation, vascular congestion and toxicity due to the presence of eosinophilic granular cells, rodlet cells, some leukocytic infiltrate and rare focal necroses. The Nile tilapia proved to be a satisfactory model for screening plant products.

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Electron microscopic study of the liver of Tilapia nilotica exposed to neopybuthrin

Cited by 5 publications

References 10 publications

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

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

Effects of the Food Additive Sodium Benzoate on Developing Chicken Liver

Bioactivity of crude ethanol extract and fractions of Eugenia uniflora (Myrtaceae) in the hepatopancreas of Oreochromis niloticus L

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