| Journal: | Anais da Academia Brasileira de Ciencias |
| Database: | PERIÓDICA |
| System number: | 000436094 |
| ISSN: | 0001-3765 |
| Authors: | Barrios, Carlos E1 Santinón, Juan José1 Domitrovic, Hugo A1 Sánchez, Sebastián1 Hernández, David R1 |
| Institutions: | 1Universidad Nacional del Nordeste, Instituto de Ictiología del Nordeste, Corrientes. Argentina |
| Year: | 2020 |
| Volumen: | 92 |
| Number: | 2 |
| Country: | Brasil |
| Language: | Inglés |
| Document type: | Artículo |
| Approach: | Analítico, descriptivo |
| English abstract | This study describes the histological characteristics and distribution of gastrointestinal tract endocrine cells (ECs) of Prochilodus lineatus (detritivorous fish) using immunohistochemical procedures. The digestive tract of P. lineatus was divided into seven portions: stomach (cardial and pyloric), pyloric caeca, and intestine (anterior, glandular, middle and posterior). A pool of specific antisera against cholecystokinin (CCK-8), -neuropeptide Y (NPY), -ghrelin (Ghre) and -leu-enkephalin (Leu-ENK) to identify ECs were used. According to the morphological characteristics of ECs, two different types were identified and classified as open or closed-type. The number of ECs varied throughout the gastrointestinal tract, though a high abundance was found in the anterior intestine and pyloric caeca. A large number of ECs immunoreactive to CCK-8 and NPY were recorded in the anterior, glandular and middle intestine. ECs immunopositive to Leu-ENK were distributed in the stomach and pyloric caeca. For Ghre, immunopositive ECs were restricted to the glandular intestine. The results of the present study indicate that P. lineatus presents an ECs distribution pattern with species-specific particularities. However, CCK showed a distribution similar to that of omnivores, which is possibly related to local signaling functions in order to achieve the correct digestion of the various organisms found in the detritus |
| Disciplines: | Biología |
| Keyword: | Peces, Anatomía e histología, Peces de agua dulce, Detritívoros, Tracto digestivo, Células endócrinas, Inmunohistoquímica, Neuropéptidos, Prochilodus lineatus, Curimatidae |
| Keyword: | Fish, Anatomy and histology, Freshwater fish, Detritivores, Digestive tract, Endocrine cells, Immunohistochemistry, Neuropeptides, Prochilodus lineatus, Curimatidae |
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