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Summary:This study was conducted with the aim of examining the location, the morphology, and numerical distribution of mast cells in the different areas of the healthy adult dog skin. Skin samples taken from the cheek, pinna, thorax and thigh areas of 10 healthy dogs were used as the study material. The results show the existence of mast cell heterogeneity in dog skin with respect to staining with alcian blue / safranin O and formaldehyde fixation sensitivity. Mast cells characterized by four combination of these parameters were observed: Mast cells containing only alcian blue-positive granules which were formalin-sensitive, mast cells containing only alcian blue-positive granules which were formalin-resistant, mast cells containing only safranin O-positive granules which were formalin resistant and mast cells containing a mixture of alcian blue-positive and safranin O-positive granules which were formalin resistant. With toluidine blue staining method, it was founded that IFAA fixed tissues were contained more mast cells than those tissues fixed with the 10% formaldehyde in all four regions. The difference in average number of mast cells per mm² between the IFAA and the 10% formaldehyde fixed tissues was statistically significant (p<0.001). In the cheek area, whilst the difference between superficial dermis and deeper dermis in terms of the average mast cell count per mm² was not statistically significant (p>0.05), in the other three areas, statistically significant differences (p<0.001) were found. In the pinna, thorax and thigh areas, superficial dermis contained more mast cells than deeper dermis. In both fixations the highest number of mast cells was observed in the skin of the pinna (p<0.001).Key words: Distribution, dog skin, heterogeneity, mast cell. Köpek derisindeki mast hücreleri: dağılım,yoğunluk, heterojenite ve tespit tekniklerinin etkisiÖzet: Bu araştırma sağlıklı erişkin köpeklerde farklı deri bölgelerindeki mast hücrelerinin yerleşim yerlerini, morfolojilerini ve sayısal dağılımlarını incelemek amacıyla yapıldı. Çalışmada materyal olarak 10 adet sağlıklı köpeklerin yanak, kulak kepçesi, kaburga ve but bölgelerinden alınan deri örnekleri kullanıldı. Bulgularımız, alcian blue / safranin O ile boyanmasına ve formaldehit tespitine duyarlılığına göre köpek derisinde mast hücre heterojenitesini gösterdi. Mast hücreleri bu parametrelerin dört kombinasyonu ile tanımlandı: Formole duyarlı sadece alcian blue-pozitif granüller içeren mast hücreleri, formole dirençli sadece alcian blue-pozitif granüller içeren mast hücreleri, formole dirençli sadece safranin O-pozitif granüller içeren mast hücreleri ve formole dirençli hem safranin O-pozitif hem de alcian blue-pozitif mikst granüller içeren mast hücreleri. Toluidin blue ile boyanmış kesitlerde dört bölgede de IFAA tespitli dokuların % 10 formolle tespit edilenlere göre daha fazla mast hücresi içerdiği dikkati çekti. Bu iki tespit arasında mm²'de mast hücre sayı ortalamalarındaki farklılığın istatistiksel olarak önemli (p<0.001) olduğu saptandı. Yanak bölges...
Summary:This study was conducted with the aim of examining the location, the morphology, and numerical distribution of mast cells in the different areas of the healthy adult dog skin. Skin samples taken from the cheek, pinna, thorax and thigh areas of 10 healthy dogs were used as the study material. The results show the existence of mast cell heterogeneity in dog skin with respect to staining with alcian blue / safranin O and formaldehyde fixation sensitivity. Mast cells characterized by four combination of these parameters were observed: Mast cells containing only alcian blue-positive granules which were formalin-sensitive, mast cells containing only alcian blue-positive granules which were formalin-resistant, mast cells containing only safranin O-positive granules which were formalin resistant and mast cells containing a mixture of alcian blue-positive and safranin O-positive granules which were formalin resistant. With toluidine blue staining method, it was founded that IFAA fixed tissues were contained more mast cells than those tissues fixed with the 10% formaldehyde in all four regions. The difference in average number of mast cells per mm² between the IFAA and the 10% formaldehyde fixed tissues was statistically significant (p<0.001). In the cheek area, whilst the difference between superficial dermis and deeper dermis in terms of the average mast cell count per mm² was not statistically significant (p>0.05), in the other three areas, statistically significant differences (p<0.001) were found. In the pinna, thorax and thigh areas, superficial dermis contained more mast cells than deeper dermis. In both fixations the highest number of mast cells was observed in the skin of the pinna (p<0.001).Key words: Distribution, dog skin, heterogeneity, mast cell. Köpek derisindeki mast hücreleri: dağılım,yoğunluk, heterojenite ve tespit tekniklerinin etkisiÖzet: Bu araştırma sağlıklı erişkin köpeklerde farklı deri bölgelerindeki mast hücrelerinin yerleşim yerlerini, morfolojilerini ve sayısal dağılımlarını incelemek amacıyla yapıldı. Çalışmada materyal olarak 10 adet sağlıklı köpeklerin yanak, kulak kepçesi, kaburga ve but bölgelerinden alınan deri örnekleri kullanıldı. Bulgularımız, alcian blue / safranin O ile boyanmasına ve formaldehit tespitine duyarlılığına göre köpek derisinde mast hücre heterojenitesini gösterdi. Mast hücreleri bu parametrelerin dört kombinasyonu ile tanımlandı: Formole duyarlı sadece alcian blue-pozitif granüller içeren mast hücreleri, formole dirençli sadece alcian blue-pozitif granüller içeren mast hücreleri, formole dirençli sadece safranin O-pozitif granüller içeren mast hücreleri ve formole dirençli hem safranin O-pozitif hem de alcian blue-pozitif mikst granüller içeren mast hücreleri. Toluidin blue ile boyanmış kesitlerde dört bölgede de IFAA tespitli dokuların % 10 formolle tespit edilenlere göre daha fazla mast hücresi içerdiği dikkati çekti. Bu iki tespit arasında mm²'de mast hücre sayı ortalamalarındaki farklılığın istatistiksel olarak önemli (p<0.001) olduğu saptandı. Yanak bölges...
The mast cells are important in physiological and pathological skin events. They play an important role in the homeostatic regulatory mechanisms in the skin and thyroid gland. Mast cells present a barrier to difference external environmental stimuli and play a mediating role in the presence of infectious agents under the epidermis. This study aimed to quantify the number of mast cells in histological sections of the skin of healthy dogs and dogs with hypothyroidism and hyperadrenocorticism and to determine the distribution of mast cell numbers in the superficial dermis and deep dermis. When we compared the total mast cell count per high power field in dogs with hypothyroidism, hyperadrenocorticism and healthy dogs, only dogs with hypothyroidism had a significant difference in the quantification of mast cells per high power field, (p < 0.05). After analyzing our results, it was possible to conclude that animals with hypothyroidism produce greater amount of mast cells in the superficial dermis than patients with hyperadrenocorticism and healthy animals.
Bisphenol A (BPA) is a chemical component used in plastic products around the world. The aim of this study is to examine the effects of this chemical compounds to which humans are frequently exposed in everyday life, on the heterogeneity and distribution of mast cells. For the study, 24 male Wistar albino rats were divided into 4 groups (control, sham, 25 mg / kg and 50 mg / kg BPA treated). BPA was dissolved in corn oil and administration was done by oral gavage for thirty days. Gastrointestinal tissue samples taken from animals anesthetized with inhalation anesthesia were fixed using BLA (Basic Lead Acetate) and Carnoy fixation. Then, following routine tissue follow-up, they were blocked with Paraplast. Sections (5-7 µm) taken from the blocks were stained using toluidine blue and Alcian blue-safranine O 8GX (AB-SO) combined dyes. Counting and statistical analysis of the mast cells in the TB-stained sections were performed. According to the results of the analysis, a higher number of mast cells was observed in the BLA fixation solution, while the increase in the number of mast cells was statistically significant in the groups treated with BPA. In the combined AB-SO 8GX staining results, AB (+), S (+) and Mix (+) mastocytes were found in almost all sections of the digestive tract. As a result of this staining process, again, no difference was found in the semi-quantitative evaluations performed including the groups treated with BPA. Although BPA does not affect the heterogeneity of mast cells, it does affect their distribution. Therefore, it is assumed that further studies will need to be carried out.
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