Наукові видання (НН МІ)
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Item The role of heavy metal salts in pathological biomineralization of breast cancer tissue(Wroclaw Medical University, 2016) Романюк, Анатолій Миколайович; Романюк, Анатолий Николаевич; Romaniuk, Anatolii Mykolaiovych; Линдін, Микола Сергійович; Лындин, Николай Сергеевич; Lyndin, Mykola Serhiiovych; Москаленко, Роман Андрійович; Москаленко, Роман Андреевич; Moskalenko, Roman Andriiovych; Гортинська, Олена Миколаївна; Гортинская, Елена Николаевна; Hortynska, Olena Mykolaivna; Линдіна, Юлія Миколаївна; Лындина, Юлия Николаевна; Lyndina, Yuliia MykolaivnaBackground. The process of pathological biomineralization plays an important part in the morphogenesis of tumors. The role of heavy metal salts in the pathological mineralization of breast cancer tissue should not be ruled out, considering their ability to enter into covalent bonds with calcium salt molecules. Objectives. The aim of the study was to investigate the microelement composition of breast cancer calcifications and the participation of heavy metals in their formation process. Material and Methods. The material for the study consisted of 20 specimens of breast cancer tissue in which calcifications had been found in histological tests (hematoxylin-eozin and alizarin red S staining). The chemical composition of the calcifications was studied using a scanning electron microscope with an energy-dispersive spectrometer. Results. Alizarin red S staining detected the presence of concrements in tumor tissue and rings of calcification around these deposits. Examining the biomineralization with energy dispersive spectrometry showed that along with calcium and phosphorus, it contained microelements such as iron, zinc, copper, chromium and nickel, which can replace calcium ions in the exterior part of hydroxyapatite molecules. This causes the hydroxyapatite molecule’s molar mass to increase and its solubility to decrease; its chances of being deposited in tumor tissue also increase. This implies that an increased intake of heavy metal salts in organisms can lead to pathological mineralization of breast cancer tissue. Conclusions. Excessive intake of heavy metal salts into the body leads to their involvement in the pathological mineralization of breast cancer tissue. This happens due to these salts bonding to hydroxyapatite molecules, direct sedimentation of proteins and increasing degenerative-necrotic changes in breast cancer tissue as the mineralization process progresses.Item Pathogenetic mechanisms of heavy metals effect on proapoptotic and proliferative potential of breast cancer(Akadémiai Kiadó, Budapest, 2015) Романюк, Анатолій Миколайович; Романюк, Анатолий Николаевич; Romaniuk, Anatolii Mykolaiovych; Линдін, Микола Сергійович; Лындин, Николай Сергеевич; Lyndin, Mykola Serhiiovych; Москаленко, Роман Андрійович; Москаленко, Роман Андреевич; Moskalenko, Roman Andriiovych; Кузенко, Євген Вікторович; Кузенко, Евгений Викторович; Kuzenko, Yevhen Viktorovych; Гладченко, Оксана Робертівна; Гладченко, Оксана Робертовна; Gladchenko, Oksana Robertivna; Линдіна, Юлія Миколаївна; Лындина, Юлия Николаевна; Lyndina, Yuliia Mykolaivnaaterials and Methods:Chemical composition was studied with the help of the scanning electron microscope with energy-dispersion spectrometer. Immunohistochemical reaction showed the p53 and Ki-67 receptors expression. The study of DNA fragmentation was performed in agarose gel. Results:There was an interrelation between the accumulations of the trace elements with the degree of cancer malignancy. There were 85% of cases with positive reaction to Ki-67 and 40% cases with positive reaction to p53. We found a moderate correlation between the accumulation of microelements in the breast cancer tissue and the level of proliferative activity. We noted the combination of the increase of DNA fragmentation with the expression of p53 and Ki-67 receptors. Conclusions:The trace elements can cause the initiation and the progression of the tumorous growth, which is expressed in the increased proliferation of tumor cells. This leads to the destabilization of the genetic material which can be expressed in the synthesis of mutant p53 protein. Finally, it leads to the block of apoptosis and regulatory effects of cells. This can cause the tumor progression and the destabilization of the genome, which is reflected in the increased DNA fragmentation.