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    Endocrine Cells in the Gastrointestinal Tract of Garra rufa
    (KAFKAS UNIV, VETERINER FAKULTESI DERGISI, 2010) Kuru, Nilguen; Cinar, Kenan; Senol, Nurguel; Demirbag, Emel; Diler, Dilek
    The distribution and relative frequency of endocrine cells in the gastrointestinal tract of the Garra rufa were studied immunohistochemically using the peroxidase anti-peroxidase complex method. The aim was to determine the distribution of specific immunoreactivities in some regions of digestive tract of the Garra rufa against the antisera VIP. substance-P, histamine, glucagon, gastrin. CCK-8, somatostatin and serotonin. The samples were taken from the enlarged areas of after oesophagus, anterior intestine, middle intestine and posterior intestine. The most intensive region of immunoreactive cells were determined as the anterior intestine. Generally, eight types of endocrine cells declined in number from the enlarged areas of after oesophagus to the intestines. These immunoreactive cells were found in the posterior intestine at very low frequencies. As a result of the immunohistochemical studies, all the peptides studied were determined to be localized generally in different distribution within the stomachs of Garra rufa (the enlarged areas of after oesophagus) as well as within their intestines (anterior, middle and posterior intestine). Density of the peptides was concluded to be associated closely with functions in Garra rufa.
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    Histological and histochemical structure of lingual salivary glands in mole rat (Spalax leucodon)
    (AGRICULTURAL RESEARCH COMMUNICATION CENTRE, 2017) Kuru, Nilgun; Cinar, Kenan; Demirbag, Emel; Ilgun, Ramazan
    The histological and histochemical structure of lingual salivary glands in mole rat (Spalax leucodon) were studied using histochemical staining techniques to provide information of its salivary glands. A total of five adult mole rat (Spalax leucodon) were used as the material. It was observed that serous and mucous glands are placed in the root of the tongue. It was detected that although the mucous gland cells were rich in terms of AB pH 0.5, 1.0, 2.5 and AF (+) mucosubstance, the PAS and KOH/PAS mucosubstances showed very weak reaction, and this mucosubstances were present at a very less amount in serous gland cells. In the PAS/AB staining, it was found that the serous and mucous gland cells showing only AB or only PAS reaction and also AB AB pH 2.5 (+) cells were found. The same findings were observed in serous glands by AF/AB staining. Consequently, the present study demonstrated characteristic features of the lingual salivary glands of the mole rat, and it revealed histological and histochemical data both in accordance with and different from that for the lingual salivary glands of mammals and other species.
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    Seasonal variation in the expression pattern of heat shock protein 70 and 90 in Common carp (Cyprinus carpio) from Karatas Lake, Burdur, Turkiye
    (Urmia Univ, 2023) Kuru, Nilgun; Oztop, Mustafa; Demirbag, Emel; Ercan, Nazli
    Organisms have evolved defense mechanisms to protect themselves from stressful conditions. The expression of heat shock proteins is considered a valid indication of protection from the adverse effects of hostile conditions. In this study, we used immunohistochemistry to investigate the seasonal effects of some abiotic factors on heat shock protein 70 and 90 (HSP70 and HSP90) expression in the liver, gills, and muscle tissues of 24 Common carp (Cyprinus carpio) caught in Karatas Lake (Burdur, Turkiye) using gillnets of various mesh sizes. We also measured some physicochemical parameters on-site at sampling time and took water samples for further analyses of other physicochemical parameters and heavy metals. Immunostaining for HSP90 was stronger than for HSP70 in both liver and gill samples. Liver and gill structures exhibited significant seasonal differences in HSP70 and HSP90 immunoreactivity, and the same was true for immunostaining for HSP70 and HSP90 in muscle samples. Some physicochemical properties seemed to vary considerably between seasons, with Fe, Mn, and Zn levels tending to exhibit changes throughout the seasons. However, these levels were considered acceptable for human health. In conclusion, this study suggests that substantial changes in HSP70 and HSP90 expression may be essential for seasonal adaptation and tolerance. Further research on fish HSPs would greatly contribute to aquaculture, which is essential for meeting food requirements.(c) 2023 Urmia University. All rights reserved.