The dynamics of the acid and neutral proteinases general enzymes activity change in the hepatocytes postnuclear fraction in the rats suffering from the Heren's carcinoma was investigated. It was determined that in the tumor development of the enzyme activity level of both the acid and neutral proteinases increased 2,6-fold. The natural preparation of the herbs (Calendula officinalis L., Echinacea purpurea L., Scorzonera humilis L., Aconitum moldavicum Hacq.) normalizes both the activity of the investigated enzymes and coefficients of the liver weights of the sick animals. The chemical medicinal preparation 5,6-benzcumarine-5-uracil normalizes the activity of the neutral cytoplasmatic proteinases and reduces the level of the proteolytic activity of the acid enzymes in comparison with the control group of the animals as well as increases of the liver weight coefficients.
The isoenzymes of glucose-6-phosphate dehydrogenase (G-6-PD, EC 126.96.36.199) was studied in hyaloplasm and mitochondria of the liver, myocardium, skeletal muscle, spleen and adrenals of alloxan diabetic rabbits. The most significant changes were found in the liver hyaloplasm: one of the minor isoenzymes, isoenzyme "C", disappears and the zone of the main isoenzyme "E" decreases significantly in comparison with the control. It was found that the intensity of these changes depends on the glycemia level in the diabetic animals.
BACKROUND: The purpose of this study was to explore whether changes in matrix metalloproteinase-9 (MMP-9) are involved in the progression of urinary bladder cancer and whether they have any prognostic value. PATIENTS AND METHODS: Overexpression of MMP-9 was evaluated in the primary tumor of 87 urinary bladder cancer cases with immunohistochemical staining. RESULTS: Of the urinary bladder carcinomas, 38% showed an overexpression (>25%) of MMP-9 immunoreactive protein. Increased positivity for MMP-9 correlated with favorable overall survival of the urinary bladder cancer patients. The 5-year overall survival and relapse-free survival was 68% and 36% in patients showing high MMP-9 expression and 48% and 19% in patients with low (
Medulloblastomas (MBs) and supratentorial primitive neuroectodermal tumours (PNETs) are the most common highly aggressive paediatric brain tumours. In spite of extensive research on these tumours, there are only few known biomarkers or therapeutic target proteins, and the prognosis of patients with these tumours remains poor. Our aim was to investigate whether carbonic anhydrases (CAs), enzymes commonly overexpressed in various tumours including glioblastomas and oligodendrogliomas, are present in MBs and PNETs, and whether their expression can be correlated with patient prognosis.
We determined the expression of the tumour-associated carbonic anhydrases CA II, CA IX and CA XII in a series of MB/PNET specimens (n = 39) using immunohistochemistry.
Endothelial CA II, cytoplasmic CA II, CA IX and CA XII were expressed in 49%, 73%, 23% and 11% of the tumours, respectively. CA II was detected in the neovessel endothelium and the tumour cell cytoplasm. CA IX was mainly expressed in the tumour cells located in perinecrotic areas. CA XII showed the most homogenous distribution within the tumours. Importantly, CA IX expression predicted poor prognosis in both univariate (p = 0.041) and multivariate analyses (p = 0.016).
We suggest that CA IX should be considered a potential prognostic and therapeutic target in MBs and PNETs.