Light and electron microscopic studies on the absorptive cells of the intestine, caeca and rectum of the adult rainbow trout, <i>Salmo gairdneri</i>, Rich

Ezeasor, D. N.; Stokoe, W.M.

doi:10.1111/j.1095-8649.1981.tb03794.x

Cited by 89 publications

(63 citation statements)

References 28 publications

(42 reference statements)

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“…They observed that molecular markers linked to nutrient digestion and absorption were high in the anterior (AI) and middle intestine (MI) while the posterior intestine (PI) predominantly expressed genes linked to immune defence mechanisms. These observations are in line with other scientists who showed that the AI and MI are mainly responsible for nutrient digestion and absorption [104,105] while the PI is responsible for induction of innate immune responses linked to activation of adaptive immunity in teleosts ish [106][107][108][109].…”

Section: Nutrigenomics In Aquaculturesupporting

confidence: 79%

Current Advances in Functional Genomics in Aquaculture

Munang’andu¹,

Evensen²

2017

Applications of RNA-Seq and Omics Strategies - From Microorganisms to Human Health

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Gene expression studies in aquaculture have slowly evolved from the traditional reductionist approach of single gene sequencing to high throughput sequencing (HTS) techniques able to sequence entire genomes of living organisms. The upcoming of HTS techniques has led to emergence of metagenomics, nutrigenomics, epigenetics and other omics technologies in aquaculture in the last decade. Metagenomics analyses have accelerated the speed at which emerging pathogens are being discovered, thereby contributing to the design of timely disease control strategies in aquaculture. Using metagenomics, it is easy to identify and monitor microbial communities found in diferent ecosystems. In vaccine production, genomic studies are being used to identify cross neutralizing antigens against variant strains of the same pathogens. In genetics and epigenetics, genomics traits have been identiied that are beginning to gain commercial applications in aquaculture. Nutrigenomics have not only enhanced our understanding of the biological markers for nutrition-related diseases, but they have also enhanced our ability to formulate diets able to maintain a stable immune homeostasis in the gut. Overall, herein, we have shown that functional genomics provide multifaceted applications ranging from monitoring microbial communities in aquatic environments to optimizing production systems in aquaculture.

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Section: Nutrigenomics In Aquaculturesupporting

confidence: 79%

Current Advances in Functional Genomics in Aquaculture

Munang’andu¹,

Evensen²

2017

Applications of RNA-Seq and Omics Strategies - From Microorganisms to Human Health

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“…Proximal portions of fishes' intestines are credited with higher nutrient digestibility and absorption, and overall digestive capacity; the distal portions of fishes' intestines are important for absorption of intact proteins and peptides molecules (Bakke-McKellep et al, 2000;Ezeasor and Stokoe, 1981;Krogdahl et al, 2003;Ledger et al, 2002;Ostaszewska et al, 2005;van den Ingh et al, 1991). This ability of distal intestine may be related to its attributed immunological function (Georgopoulou and Vernier, 1986;Jenkins et al, 1994;Rombout et al, 1985;Rombout and van den Berg, 1989).…”

Section: Resultsmentioning

confidence: 99%

Intestinal histomorphology in Pseudoplatystoma fasciatum fed bovine colostrum as source of protein and bioactive peptides

Rodrigues¹,

Pauletti²,

Kindlein

et al. 2010

Sci. agric. (Piracicaba, Braz.)

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Histological responses of the intestine are key for evaluating nutritional value of feed ingredients, since the organ is not only the chief site of feed digestion and nutrient absorption but also plays an important immunological function. Histomorphological alterations were evaluated in the intestine of juvenile striped catfish, Pseudoplatystoma fasciatum, fed diets containing 0 (control), 10 or 20% inclusion of lyophilized bovine colostrum (LBC), as source of protein or bioactive peptides, for either 30 or 60 days. Fish fed 20LBC presented at 60d a distinct pattern of macrophages and, some of them, higher number of vacuoles in rectum mucosa. The thickness of the muscle layer (TML) in fish fed diets with LBC was higher in the first portion of medium intestine than fish fed 0LBC. All fish presented significant increase of TML in the second portion of medium intestine along feeding period, but fish fed 20LBC had smaller values of TML than those of fish fed 0 and 10LBC which might be related to the higher intestinal coefficient found for this group. The TML of rectum was higher just for fish fed 10LBC. Dietary LBC altered morphometrical features of juvenile striped catfish intestine and possibly induced inflammatory reaction in the rectal mucosa, as a function of level of inclusion, feeding period and segment of intestine analyzed. Key words: gut absorption, histology, mammal protein, lyophilized bovine colostrum, striped catfish Histomorfologia intestinal de Pseudoplatystoma fasciatum alimentado com colostro bovino como fonte de proteína e peptídeos bioativos RESUMO: Respostas histológicas do intestino são fundamentais para avaliar o valor nutritivo de ingredientes alimentares, uma vez que o órgão não é só o principal local de digestão e absorção dos nutrientes, mas também exerce uma importante função imunológica. Alterações histomorfológicas foram avaliadas no intestino de juvenis de cachara, Pseudoplatystoma fasciatum, alimentado com dietas contendo 0 (controle), 10 e 20% de inclusão de colostro bovino liofilizado (CBL) como fonte de proteína e peptídeos bioativos, aos 30 e 60 dias. Aos 60 dias, peixes alimentados com 20CBL apresentaram macrófagos de aspecto distinto e alguns, uma grande concentração de vacúolos na mucosa retal. A espessura da camada muscular (ECM) em peixes alimentados com CBL foi maior na primeira porção do intestino médio em relação àqueles alimentados com 0CBL. Ao longo do período experimental, todos os peixes mostraram aumento significativo na ECM na segunda porção do intestino médio, entretanto peixes do grupo 20CBL tiveram menores valores para a ECM do que os demais, o que pode estar relacionado com o maior coeficiente intestinal encontrado para este grupo. A ECM no reto foi maior apenas para os peixes alimentados com 10CBL. A inclusão de CBL na dieta do cachara alterou características morfométricas do intestino e, possivelmente, induziu uma reação inflamatória na mucosa retal em função do nível de inclusão, período de alimentação e porção do intestino analisada. Palavras-chave:...

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“…The proximal portions of the intestines of fish are related to higher capacity and effective contribution to digestion and nutrient absorption, while the distal region is involved in the absorption of intact proteins and peptides (Krogdahl et al, 2003) -an ability that is related to its immunological role (Buddington et al). In pirarucu, the latter function is most likely performed in the S3 region, where absorption vacuoles were often observed in the apical cytoplasm of enterocytes, which can be indicative of protein absorption by pinocytosis (Ezeasor & Stokoe, 1981;Carrassón et al).…”

Section: Discussionmentioning

confidence: 99%

Morphology and Histology of the Pirarucu (Arapaima gigas) Digestive Tract

Rodrigues

Cargnin-Ferreira

2017

Int. J. Morphol.

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of the pirarucu (Arapaima gigas) digestive tract. Int. J. Morphol., 35(3):950-957, 2017. SUMMARY:The present study describes the morphology and histology of the digestive tract of juvenile pirarucu, which is a Neotropical fish species with great potential for aquaculture in the Amazon region. Three size classes of pirarucu juveniles from commercial fish farms were sampled for histological examination of the oesophagus, stomach, pyloric caeca, intestine and liver. The morphological and histological features of the pirarucu digestive tract are similar to other carnivorous teleosts and enable the species to ingest, store and digest large food items. Acidic and neutral mucins are secreted by the mucosa of the oesophagus, stomach, pyloric caeca and intestine to protect the mucosal epithelium and to lubricate and facilitate food passage along the digestive tract. Complex transverse folds are predominant in the intestinal mucosa and most likely contribute to optimization of the digestion and nutrient absorption processes, thereby offsetting the relatively short length of the intestine. The exocrine pancreas appears diffuse in the liver and mesentery around the pyloric region of the stomach, pyloric caeca and initial part of the intestine. The digestive tract morphology and thickness become increasingly developed with the size of pirarucu.

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Light and electron microscopic studies on the absorptive cells of the intestine, caeca and rectum of the adult rainbow trout, Salmo gairdneri, Rich

Cited by 89 publications

References 28 publications

Current Advances in Functional Genomics in Aquaculture

Current Advances in Functional Genomics in Aquaculture

Intestinal histomorphology in Pseudoplatystoma fasciatum fed bovine colostrum as source of protein and bioactive peptides

Morphology and Histology of the Pirarucu (Arapaima gigas) Digestive Tract

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