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Opis: Triple-negative breast cancer (TNBC) is a breast cancer (BC) subtype that accounts for approximately 15–20% of all BC cases. Cancer cell lines (CLs) provide an efficient way to model the disease. We have recently isolated a patient-derived triple-negative BC CL MFUM-BrTNBC-1 and performed a detailed morphological and molecular characterisation and a comprehensive comparison with three commercial BC CLs (MCF-7, MDA-MB-231, MDA-MB-453). Light and fluorescence microscopy were used for morphological studies; immunocytochemical staining for hormone receptor, p53 and Ki67 status; RNA sequencing, qRT-PCR and STR analysis for molecular characterisation; and biomedical image analysis for comparative phenotypical analysis. The patient tissue-derived MFUMBrTNBC-1 maintained the primary triple-negative receptor status. STR analysis showed a stable and unique STR profile up to the 6th passage. MFUM-BrTNBC-1 expressed EMT transition markers and displayed changes in several cancer-related pathways (MAPK, Wnt and PI3K signalling; nucleotide excision repair; and SWI/SNF chromatin remodelling). Morphologically, MFUM-BrTNBC-1 differed from the commercial TNBC CL MDA-MB-231. The advantages of MFUM-BrTNBC-1 are its isolation from a primary tumour, rather than a metastatic site; good growth characteristics; phenotype identical to primary tissue; complete records of origin; a unique identifier; complete, unique STR profile; quantifiable morphological properties; and genetic stability up to (at least) the 6th passage.
Ključne besede: hormonal receptors, MFUM-BrTNBC-1, MCF-7, MDA-MB-231, MDA-MB-453
Objavljeno v DKUM: 10.04.2025; Ogledov: 0; Prenosov: 3
Celotno besedilo (5,33 MB)
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Opis: Struma ovarii is a rare type of germ cell tumor and a rare cause of ectopic thyroidal hormonal production. We report a case of laparsocopic management of a thyrotoxic struma ovarii. In a 49-year-old patient, previously treated by ablative surgery and radioactive iodine for Graves' disease, a new onset of hyperthyroidism occurred unexpectedly. A whole-body scan with 131I detected increased pelvic uptake, suggesting struma ovarii. The patient was subsequently treated with laparoscopic bilateral salpingo-oophorectomy. The postoperative course was uneventful. Histopathologic examination revealed the presence of a benign struma ovarii. Three years after treatment the patient is disease free and is receiving thyroid replacement therapy with levothyroxine. In this case the thyrotoxic struma ovarii was diagnosed preoperatively and laparoscopic surgery proved to be a useful and reliable method for ovarian ablation.
Ključne besede: struma jajčnika, hipertiroidizem, laparoskopska operacija
Objavljeno v DKUM: 19.04.2024; Ogledov: 185; Prenosov: 2
Celotno besedilo (589,34 KB)
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Opis: Rak dojk je najpogostejši rak na svetu. Eden izmed njegovih podtipov je trojno negativni rak dojk (TNRD), za katerega je značilen agresiven potek, slabša prognoza in heterogenost. V svoji doktorski nalogi predstavim novo izolirano celično linijo TNRD, poimenovano MFUM-BrTNBC1. Linija je bila celovito karakterizirana (morfološko, fenotipsko, genotipsko). Za kontrole so služile komercialne celične linije z različnimi receptorskimi profili (MCF-7, MDA-MB-231, MDA-MB-453). Primerjalne morfološke analize so bile opravljene s pomočjo mikroskopije ter biomedicinske slikovne analize. S pomočjo imunocito/histokemičnih barvanj je bila preverjena izraženost hormonskih receptorjev (estrogen, progesteron), HER2, p53 in Ki-67 statusa. Ekspresija receptorjev je bila dodatno preverjena na transkripcijski ravni s qRT-PCR metodo. Dodatno je bilo opravljeno RNA sekvenciranje za molekularno analizo. Avtentičnost celičnih linij je bila preverjena s pomočjo STR profiliranja. MFUM-BrTNBC-1 celična linija je ohranila trojno negativni receptorski status in genetsko stabilnost do vsaj 6. pasaže. Rezultati STR analize in navzkrižna preverba z mednarodnimi bazami so dokazali avtentičnost celične linije. MFUM-BrTNBC1 se je po morfologiji celic razlikovala tudi od TNRD celične linije MDA-MB-231. Razlike od komercialne linije, predstavljajo tudi glavne prednostne lasnosti MFUM-BrTNBC-1. Te so izolacija iz primarnega tumorskega tkiva, popoln izvorni zapis, mednarodno poimenovanje, celoten in edinstven STR profil ter genetska stabilnost do vsaj 6. pasaže.
Ključne besede: trojno negativni rak dojk, MFUM-BrTNBC-1, rak dojk, in-vitro modeli, celične linije
Objavljeno v DKUM: 29.11.2022; Ogledov: 823; Prenosov: 78
Celotno besedilo (6,85 MB)

Opis: Background: Urokinase plasminogen activator (uPA) and plasminogen activator inhibitor type-1 (PAI-1) play a key role in tumour invasion and metastasis. High levels of both proteolytic enzymes are associated with poor prognosis in breast cancer patients. The purpose of this study was to evaluate the correlation between traditional prognostic factors and uPA and PAI-1 expression in primary tumour of breast cancer patients. Patients and methods: 606 primary breast cancer patients were enrolled in the prospective study in the Department of gynaecological oncology and breast oncology at the University Medical Centre Maribor between the years 2004 and 2010. We evaluated the traditional prognostic factors (age, menopausal status, tumour size, pathohistological type, histologic grade, lymph node status, lymphovascular invasion and hormone receptor status), together with uPA and PAI-1. We used Spearman%s rank correlation, Mann Whitney U test and X2 test for statistical analysis. Results: Our findings indicate a positive correlation between uPA and tumour size (p < 0.001), grade (p < 0.001), histological type (p < 0.001), lymphovascular invasion (p = 0.01) and a negative correlation between uPA and hormone receptor status (p < 0.001). They also indicate a positive correlation between PAI-1 and tumour size (p = 0.004), grade (p < 0.001), pathohistological type (p < 0.001) and negative correlation between PAI-1 and hormone receptor status (p = 0.002). Conclusions: Our study showed a relationship between uPA and PAI-1 and traditional prognostic factors. Their role as prognostic and predictive factors remains to be further evaluated.
Ključne besede: urokinase plasminogen activator, plasminogen activator inhibitor, breast cancer
Objavljeno v DKUM: 05.04.2017; Ogledov: 1304; Prenosov: 156
Celotno besedilo (597,75 KB)
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Opis: Purpose: Prostate cancer is one of the most common malignancies worldwide. The possible prognostic value of tissue markers, such as p53, may give a better understanding of this disease, improve staging accuracy, and help in choosing optimal treatment. In this study, we examined p53 expression and its correlation with Gleason score, prostatespecific antigen (PSA) levels, and patient age in a Slovenian population. Methods: This retrospective pilot study included 25 radical prostatectomy patients. The immunohistochemical expression of p53 was determined and expressed as a p53 index. In addition, correlations between p53 index, Gleason score before and after prostatectomy, PSA level, and patient age were statistically evaluated. Results: The p53 tissue marker was unevenly distributed in prostate cancer independently of local Gleason pattern; however, its expression correlated with Gleason score after prostatectomy and showed borderline correlation with PSA. There were also statistically significant correlations between Gleason score before and after prostatectomy, PSA level, and patient age. Conclusions: Despite the low number of cases presented in this study, our results demonstrate that p53 may have predictive value in prostate cancer. Thus, p53 is a promising tissue marker that can be used as an additional diagnostic parameter.
Ključne besede: rak prostate, tkivni označevalci, p53, imunohistokemija
Objavljeno v DKUM: 30.12.2015; Ogledov: 1848; Prenosov: 62
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