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Vliv steroidních hormonů s anabolickým účinkem na mikroskopickou strukturu varlat u prasat
Táflová, Michaela
In the food industry there are illegally used steroids when fattening animals to achieve quicker grow. Residues of these substances, from pork, can then reach the consumer and cause a number of side effects. Therefore in this thesis named „The influence of steroids with anabolic effects on the microscopic structure of testes of pigs“ histological and cytological changes on testicular tissue of pigs from three groups that were intramuscularly administered a mixture containing nandrolone (group 1), testosterone (group 2) and mixture without steroids (control group) were evaluated. There were 9 samples used for analysis from which histological sections were prepared and coloured later on. The diameter of the seminiferous tubules, the height of the epithelium, the presence of spermatids, the shape and distance of individual seminiferous tubules and presence of Leydig cells in interstitium was included in the analysis of the tissue changes. The results were documented and statically processed by using appropriate software. Statistically conclusive differences were found mainly between control and steroids which proves their influence on the structure of sex glands.
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Study of organs of mice in inhalation experiments
Vrlíková, Lucie ; Diviš, Pavel (referee) ; Dočekal, Bohumil (advisor)
The diploma thesis is devoted to study potential risks for living organisms resulting from inhalation of nanoparticles of chosen heavy metals. The main aim of this work is the investigation of organs from experimental white mice after their guided inhalation of lead nanoparticles. The samples of liver and lungs from these animals are taken in time periods during the inhalation experiments and processed by specific methods for their evaluation. After pressurized microwave assisted decomposition of selected samples of mice organs in high purity concentrated nitric acid the content of lead is determined by atomic absorption spectrometry with electrothermal atomization. Furthermore, the changes are monitored using the microscopy of histological slides stained with hematoxylin-eosin. The results of both approaches are evaluated and compared within the frame of this work.
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Carotid Artery Stenosis
Svoboda, Norbert ; Beneš, Vladimír (advisor) ; Peisker, Tomáš (referee) ; Herzig, Roman (referee)
The basis of the doctoral thesis consists of three studies focused on the diagnosis of carotid stenosis. The first study examines the histological structure of carotid plaques and their relationship to clinical manifestations. The study included 269 patients with 280 analyzed plaques. Multiple logistic regression demonstrated a significant association between symptomatic stenosis and foam cells (OR=1.9, p=0.03) as well as plaque thrombosis (OR=3.5, p=0.02). A significant correlation was also found between symptomatic plaque and unstable plaque according to the comprehensive AHA plaque classification (OR=1.8, p=0.03).The second study addresses the accuracy of carotid stenosis diagnosis using digital subtraction angiography (DSA). Carotid stenosis was measured on DSA and histologically processed plaques obtained during carotid endarterectomy in 644 patients. The study did not establish a correlation between the findings on the histological plaque and DSA (correlation coefficient of 0.22 for ECST and 0.20 for NASCET). The last study focuses on the analysis of the biomarker of oxidative stress (malondialdehyde, MDA) as a predictor of unstable carotid plaques. The study involved 35 patients. Patients with asymptomatic carotid stenosis and those who experienced amaurosis fugax had significantly lower...
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Dopad alimentární expozice bisfenolu S na vybrané orgány laboratorních potkanů
ROČEŇOVÁ, Adéla
The present thesis investigated the impact of a ten-week oral exposure to BPS (50 ?g/kg live weight/day) in female outbred Wistar Han rats. The effect of BPS exposure on live weight, absolute and relative kidney and liver weights, morphometric parameters of kidney and renal corpuscles, histopathological changes of kidney and liver were evaluated. In addition, the concentration of total protein, triacylglycerols, cholesterol, urea and alanine aminotransferase activity were determined in blood serum.
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Diagnostics of Helicobacter pylori using histological and immunohistochemical examination
BURDOVÁ, Anna
The main topic of this bachelor thesis is the bacterium Helicobacter pylori, its occurrence in the gastric mucosa, and the metod of its diagnosis in the laboratory using histological and immunohistochemical examination. In the theoretical part, I describe the bacterium itself, its morphology and mainly its diagnostics. There are many ways to detect the presence of this bacterium, most commonly divided into invasive tests, which include histological examination, cultivation and urease test, and non-invasive, where we can use serological and breathing tests. I also describe the anatomy and histological structure of the stomach in this part. Then I follow up on stomach pathology, where I focused on the most common diseases caused by Helicobacter pylori, acute and chronic gastritis and stomach tumors. The over-all histological examination is also included, its parts being receiving the sample to the department through fixation with examples of various fixation agents, to embedding, cutting and staining, where I also describe the types of staining that are used in the practical part. I also deal with the topic of immunohistochemistry. One of the goals of the practical part is to master the basic routine Hematoxylin eosin staining, special Giemsa staining and immunohistochemical examination of the antigen using the Anti-Helicobacter pylori polyclonal antibody. Another goal is to map the occurrence of Helicobacter pylori infection based on age groups, sex of examined patients and season. I set two research questions that I would like to answer. Results obtained in the year 2022 will be statistically processed and supplemented with photomicrographs of selected samples.
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Dopad různé alimentární expozice bisfenolu na játra potkanů
LABUDOVÁ, Kateřina
Bisphenol S (BPS) is an organic compound widely used in industrial production as a substitute for bisphenol A (BPA) for which negative impacts on the human body have been demonstrated and have therefore been significantly regulated. However, as time progresses, the negative properties of BPS are also shown, especially for the endocrine and reproductive systems. The liver is an organ in which xenobiotics are detoxified and thus BPS and BPA. The aim of the bachelor thesis was to verify whether 10-week oral exposure to BPS (4 g, 50 g, 100 mg/kg bw/day) and BPA (100 mg/kg bw/day) will lead to a negative impact on body weight, weight gain, weight and morphological liver structure and on the concentration of triglycerides, cholesterol, total white-vinas, urea and alkaline phosphatase activity in blood serum. The experiment involved 24 rats. BPA and BPS were administered daily by gastric tube in sunflower oil. The results of our research clearly did not show a negative effect of BPS and BPA in rats on body weight, absolute gain, absolute and relative liver weight in rats. There was also no evidence of histopathological changes in rat liver. In contrast, bio-chemical parameters were altered compared to the control group. Decreases in trigly-cerides, total protein content, urea, alkaline phosphatase activity and increases in serum cholesterol were noted. In the 50 g/kg body weight/day group of rats, the highest and lowest decreases in biochemical parameters were observed, respectively. The exposure dose of 100 mg BPS and BPA in our experiment did not cause liver histopathological changes or changes in biochemical parameters according to the hy-pothesis. A possible explanation could be given by the carrier for which sunflower oil with natural antioxidant content was used.
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Pathology of adnex
BARANCOVÁ, Iveta
The term adnex comes from the latin word nexus or connection and i tis used in gynecology and dermatology. Gynecological adnexa involves the internal genitals of woman without uterus, so it involves the fallopian tubes and ovaries. In every woman´s life, there can be conditions when the woman feels abdominal pain. These abdominal pain can´t be serious, however if the pain persists, it needs to be examinated their origin. During diagnostics, it is also important to keep in mind that the woman is prone to various diseases associated with gynecological adnexa. This bachleor thesis deals with pathological conditions od gynecological adnexa, therefore inflammation of the fallopian tubes and ovaries, ovarian cysts, adnexal endometriosis and benign but also malignant neoplasms located in the fallopian tubes and ovaries. Because every woman is at risk of an ectopic pregnancy when she is of childbearin age, this type of pregnancy is considered as pathological, so it is included in this bachleor thesis as well. Forty samples of gynecological adnexa are processed for this thesis. A selected part of the adnex sample is documented in this thesis. Samples are processed in all sections of the histological laboratory. After that histological preparations are made and the diagnosis is made too. Histological preparations are stained with basic histological staining Hematoxylin-eosin, but also with special methods Hematoxylin-van Gieson and Goldner´s trichrome. The thesis also contains a statistical evaluation of the incidence of gynecological adnexa for the period from 2015-2019, which were diagnosed at the pathological department. Female sterilization is included in this evaluation too, because its number has increased over the period. The sterilization included in the evaluation was always performed with the patient´s consent and at her own reques, for example it is performed during the planned caesarean section.
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