This study aims to determine serum neopterin, procalcitonin, total sialic acid (TSA), paraoxonase-1 (PON1), and some haematological indices in calves with aspiration pneumonia (ASP). The patient group consisted of 30 calves of the Simmental breed, 0–28 days old, diagnosed with ASP upon clinical examination, anamnesis, auscultation examination, and radiographic results. The control group consisted of 10 healthy calves, otherwise with the same characteristics. A significant difference was found between calves with ASP and the control group of calves in serum iron (Fe, P < 0.001), total iron-binding capacity (TIBC, P < 0.05), PON1, TSA, procalcitonin, neopterin, and total leukocyte count (WBC) indices as a result of the analyses (P < 0.001). Serum procalcitonin concentration was found to be 285.71 ng/ml in the ASP group and 30.34 ng/ml in the control group. Serum neopterin concentration was found to be 37.68 nmol/l in the ASP group and 15.14 nmol/l in the control group. Serum procalcitonin, neopterin, and TSA concentrations were found to be significantly higher in the ASP group compared to the control group. It was concluded that biomarkers such as serum procalcitonin, neopterin, and TSA are high in calves with ASP, and as a result, these markers provide diagnostically and prognostically important information.
The aim of this study was to assess the correlation between thallium-201 (201Tl) uptake and proliferative activity measured using the proliferating cell nuclear antigen labelling index (PCNA-LI) in brain tumours. Twenty-nine patients with brain tumours were included in this study. Of these, seven were diagnosed with meningioma, 13 had high grade glioma (HGG) and nine had low grade glioma (LGG). A 210Tl single photon emission computed tomography study was performed on all patients before operation, and 201Tl uptake index (UI) and retention index (RI) values were calculated. Cell proliferation was determined by PCNA. While all of the HGGs and meningiomas showed intense 201Tl accumulation on visual interpretation, eight of the nine LGGs did not show accumulation of 210Tl at the tumour site. 201Tl UI values were 3.23+/-0.89 and 2.67+/-0.66 in HGG, 1.27+/-0.18 and 1.23+/-0.09 in LGG, and 4.35+/-1.60 and 2.52+/-0.78 in meningioma on early and delay images, respectively. There was a statistical difference between the 201Tl UI in HGG and LGG. PCNA-LI values were 16.72+/-6.15%, 1.63+/-0.81% and 2.00+/-1.88% in HGG, LGG and meningioma, respectively. The PCNA-LI in HGG was significantly higher than in LGG and meningioma. While the correlation coefficient between the 201Tl UI and the PCNA-LI was 0.94 in gliomas (n=22), there was no correlation in meningiomas. No statistically significant correlation was found between the RI and the PCNA-LI in gliomas. The presence of a strong positive correlation between 201Tl uptake and PCNA-LI indicates that 201Tl uptake can predict the proliferative activity of the glioma.
In this study, we aimed to compare and correlate the PCNA, MMP-9 and p53 expressions and differentiation degree of bovine ocular squamous cell carcinomas (BOSCCs) by immunohistochemical methods. The material of this study was composed of BOSCC biopsy samples taken from 30 cattle brought to our department. Tissue samples were fixed in 10% buffered formalin, processed routinely, embedded in paraffin, sectioned at 5 μm, and stained with hematoxylin & eosin in order to detect histopathological changes. Sections were examined and photographed under a light microscope. Avidin-biotin-peroxidase method was used for immunohistochemistry. Macroscopically the masses were nodular to cauliflower-like shaped. The surfaces of the masses were highly hemorrhagic and ulcerative, and sometimes covered with a purulent discharge. Histopathologically, we defined cases with excessive and large numbers of keratin pearls, large tumoral islands, and evident squamous differentiation as well-differentiated. Cases with smaller tumoral islets, decreased number and size of keratin pearls, but higher number of poorly-differentiated cells compared to well-differentiated cases were defined as moderately-differentiated. Tumors in which keratinization was either absent or formed in individual cells were classified as poorly-differentiated. Statistical analysis revealed that there was no significant difference between well, moderately, and poorly differentiated tumors in terms of PCNA and MMP-9 expressions, but we found that the increase in p53 expression negatively correlated with the degree of differentiation of the tumor. In conclusion, we think that p53 can be a useful marker in determining the prognosis of BOSCCs.
Fibropapilloma is the most common neoplasic formation associated with bovine papillomavirus type I. It occurs inside the penis of bulls and causes clinically adverse effects, such as phimosis, paraphimosis, urethral stricture, and urinary retention. This study aimed to conduct a clinical and immunohistochemical evaluation of penile tumors, which are associated with adverse outcomes with regard to breeding value and yield in bulls.A total of 40 bulls of different breeds aged between 10 months to 3 years were included in the study. Tumor tissue samples collected postoperatively were fixed in 10% buffered formaldehyde solution. The avidin–biotin–peroxidase method was used for immunohistochemical staining. Three separate areas were examined under 40X objective lens for each fibropapilloma tissue. The immunoreactivity was classified as none (-), mild (+), moderate (++), and severe (+++). Fibropapillomas ranged from 2 to 10 cm in diameter. Thirty-two papillomas were pedunculated and eight were sessile and attached to the body; 30 were solitary and 10 were multiple. There were 13 relapsed cases and 27 non-relapsed cases. Immunohistochemical examination revealed a statistically significant difference in the binary comparisons of proliferating cell nuclear antigen (PCNA) and hypoxanthine-guanine phosphoribosyltransferase (HPRT) based on positive cell scoring between the relapsed and non-relapsed cases. As a result, it was concluded that the clinical data together with the cancer markers, which were used in the immunohistochemical evaluation and were of great importance in terms of the prognosis of penile tumors that caused significant economic losses, are useful parameters in evaluating the malignancy of penile tumors.
This study aimed to evaluate the expression of PCNA, p53, MMP-9, Vimentin and S100 immunohistochemically and determine the aggressiveness in diagnosis of bovine melanomas. The material of this study consisted of melanoma biopsy samples taken from 10 cattle brought to our department. Tissue samples from cattle were fixed in 10% buffered formalin solution. After routine procedures paraffin blocks were cut sections of 5 μm thickness. For bleaching, some heavily pigmented tumour sections were deparaffinized, hydrated, and incubated in 10% solution of hydrogen peroxide (H2O2) for 5 hours at 65 o C until sections appeared clear and Hematoxylin & Eosin (H&E) staining was applied to the sections to detect histopathological changes. Sections were examined and photographed under a light microscope. Avidin-Biotin Peroxidase was used as the immunohistochemical method. We observed that the tumoral mass was solitary, firm, hairless, oval-round shaped and quite large. We detected spindle and epithelioid type tumoral cells containing a lot of large brownish-black granular melanin pigments in their cytoplasm. All melanoma cases were immune positive for S100, Vimentin, PCNA, p53 and MMP-9 expressions. In conclusion, we think that these immunohistochemical markers are quite convenient in evaluating the prognosis and diagnosis of bovine melanomas.
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