Bombesin immunoreactive cells found in the stomach of the Salmo trutta
11 and Oncorhynchus mykiss
32 and intestine of Pseudopxinus antalyae
16, on the contrary, authors did not detect them in the stomach of the Korean aucha perch
13 and intestinal regions of the Salmo trutta
11, Zacco platypus
12, Korean aucha perch
13 and Barbus conchonius
33. We did not observe bombesin immunoreactivity in the studied regions.
As in the present study, cells immunoreactive for CCK were determined in the anterior intestine by authors8,11,15,17,34. No CCK immunoreactive cells were identified in the stomach11,13,17,34,35 and posterior intestine8,11,17,34. Similar results were observed in the Dicentrarchus labrax. On the other hand, these cells were identified in the stomach of the Stizostedion lucioperca8 and posterior intestine of the Pseudopxinus antalyae15.
In the Pseudopxinus antalyae16, cells that immunoreactive for histamine were demonstrated throughout the whole gastrointestinal tract but they were not observed in the intestinal regions in this study.
In the present study, neurotensin immunoreactive cells were not determined in the studied regions. Similar results were reported by authors34,36,37. Contrary to these results, they were observed in the intestine15 and stomach36.
In this study, secretin immunoreactive cells were not observed in the stomach and intestine regions of the Dicentrarchus labrax. These results agree well with those of11-13,32-37, but differ from results of authors who demonstrated the secretin immunoreactive cells in the stomach11,36 and intestine regions15.
Several authors13,34,36,38-40 were demonstrated cells that immunoreactive for somatostatin in the stomach of the different species. In this study, somatostatin immunoreactive cells were not identified in the stomach of the Dicentrarchus labrax. Similar results were reported by Youson et al., Gençer Tarakçı et al., Min et al. The result that somatostatin immunoreactive cells, which were present in the intestine of the Dicentrarchus labrax in this study was similar to that of the study on Ictalurus punctatus18 and Tilapia nilotica41. These cells were demonstrated in the entire intestine except for posterior intestine of the Zacco platypus12 and Pseudophoxinus antalyae15, but Gençer Tarakçı et al. reported that somatostatin immunoreactive cells found only in the posterior intestine of the Oreochromis niloticus. In addition, it is also demonstrated that no somatostatin immunoreactive cells were found in the intestinal regions of different species by several authors13,33,34,42,43.
Although Trk A immunoreactive cells were identified in the intestine by Lucini et al. and Çınar et al. did not find them in the intestinal regions. In this study, we observed them in the anterior and posterior intestine.
It was reported that Trk B immunoreactive cells were present in the intestine15 and stomach44. In the present study, they were observed only in two stomach regions.
Lucini et al. determined that Trk C immunoreactive cells were present both in the stomach and the intestine. On the other hand, they were found in the intestine regions by Çınar et al.. In the present study, we observed them in the stomach regions, not in the intestine.
Authors11,13,32,34-37 reported that cells immunoreactive for VIP were not present in the stomach of different species and these cells were not found in the intestine of the Salmo trutta11, Zacco platypus12, Korean aucha perch13, Sparus auratus34 and Mugil saliens37. Similar results were obtained in the present study. On the other hand, these cells were demonstrated in the stomach of the zander9 and Ictalurus punctatus18 and intestine of the zander9, Pseudophxinus antalyae15 and Ictalurus punctatus18.
In conclusion, the regional distribution and relative frequency of immunoreactive cells in the stomach and intestine of the Dicentrachus labrax were essentially similar to those of different species. However, some differences were determined in this species.
)
)
)
)
)
)
)
)
