1. Imunohistokemična analiza izražanja glukokortikoidnih receptorjev pri zgodnjem raku dojk in njihov vpliv na odgovor na zdravljenje z neoadjuvantno sistemsko terapijoMarjetka Sraka, Barbara Gazić, Primož Drev, Cvetka Grašič-Kuhar, 2024, original scientific article Abstract: Glukokortikoidni receptor (GR) je različno izražen na tumorskih in imunskih celicah raka dojk, njegova izraženost pa je morda odvisna od molekularnega podtipa raka dojk, prav tako njegova izraženost morda vpliva na odgovor na neoad-juvantno sistemsko terapijo. Naš namen je vpeljati zanesljivo imunohistokemično barvanje s protitelesi proti GR, drugi namen pa je oceniti izraženost GR na vzorcih raka dojk in preučiti, ali se ta izraža različno pri različnih podtipih in ali njegova izraženost vpliva na odgovor na neoadjuvantno sistemsko terapijo.
Keywords: rak dojk, neoadjuvantno sistemsko zdravljenje, glukokortikoidni receptor
Published in DiRROS: 26.07.2024; Views: 611; Downloads: 246
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2. The prognostic significance of tumor-immune microenvironment in ascites of patients with high-grade serous carcinomaSimona Miceska, Erik Škof, Simon Buček, Cvetka Grašič-Kuhar, Gorana Gašljević, Špela Smrkolj, Veronika Kloboves-Prevodnik, 2023, original scientific article Abstract: Background: High-grade serous carcinoma (HGSC) is often associated with ascites at presentation. Our objective was to quantify immune cells (ICs) in ascites prior to any treatment was given and evaluate their impact on progression-free survival (PFS) and overall survival (OS). Patients and methods: Forty-seven patients with primary HGSC and ascites were included. Flow-cytometric analysis was performed to detect percentages of CD3+ T cells (CD4+, CD8+, Tregs, and NKT cells), B cells, NK cells (CD56brightCD16- and CD56dimCD16+ subsets), macrophages and dendritic cells (DCs). Furthermore, CD103 expression was analyzed on T cells and their subsets, while PD-1 and PD-L1 expression on all ICs. Cut-off of low and high percentages of ICs was determined by the median of variables, and correlation with PFS and OS was calculated. Results: CD3+ cells were the predominant ICs (median 51%), while the presence of other ICs was much lower (median ≤10%). CD103+ expression was mostly present on CD8+, and not CD4+ cells. PD-1 was mainly expressed on CD3+ T cells (median 20%), lower expression was observed on other ICs (median ≤10%). PD-L1 expression was not detected. High percentages of CD103+CD3+ T cells, PD-1+ Tregs, CD56brightCD16- NK cells, and DCs correlated with prolonged PFS and OS, while high percentages of CD8+ cells, macrophages, and PD-1+CD56brightCD16- NK cells, along with low percentages of CD4+ cells, correlated with better OS only. DCs were the only independent prognostic marker among all ICs. Conclusions: Our results highlight the potential of ascites tumor-immune microenvironment to provide additional prognostic information for HGSC patients. However, a larger patient cohort and longer follow-up are needed to confirm our finBackground: High-grade serous carcinoma (HGSC) is often associated with ascites at presentation. Our objective was to quantify immune cells (ICs) in ascites prior to any treatment was given and evaluate their impact on progression-free survival (PFS) and overall survival (OS). Patients and methods: Forty-seven patients with primary HGSC and ascites were included. Flow-cytometric analysis was performed to detect percentages of CD3+ T cells (CD4+, CD8+, Tregs, and NKT cells), B cells, NK cells (CD56brightCD16- and CD56dimCD16+ subsets), macrophages and dendritic cells (DCs). Furthermore, CD103 expression was analyzed on T cells and their subsets, while PD-1 and PD-L1 expression on all ICs. Cut-off of low and high percentages of ICs was determined by the median of variables, and correlation with PFS and OS was calculated. Results: CD3+ cells were the predominant ICs (median 51%), while the presence of other ICs was much lower (median ≤10%). CD103+ expression was mostly present on CD8+, and not CD4+ cells. PD-1 was mainly expressed on CD3+ T cells (median 20%), lower expression was observed on other ICs (median ≤10%). PD-L1 expression was not detected. High percentages of CD103+CD3+ T cells, PD-1+ Tregs, CD56brightCD16- NK cells, and DCs correlated with prolonged PFS and OS, while high percentages of CD8+ cells, macrophages, and PD-1+CD56brightCD16- NK cells, along with low percentages of CD4+ cells, correlated with better OS only. DCs were the only independent prognostic marker among all ICs. Conclusions: Our results highlight the potential of ascites tumor-immune microenvironment to provide additional prognostic information for HGSC patients. However, a larger patient cohort and longer follow-up are needed to confirm our findings.dings.
Keywords: high-grade serous carcinoma, immune cells, prognostic markers
Published in DiRROS: 26.07.2024; Views: 847; Downloads: 349
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3. Changes in the quality of life of early breast cancer patients and comparison with the normative Slovenian populationCvetka Grašič-Kuhar, Tjaša Gortnar Cepeda, Christian Kurzeder, Marcus Vetter, 2023, original scientific article Abstract: We aimed to identify changes in quality of life after breast cancer treatment and compare them withthe normative population data for the Slovenian population.Patients and methods. A prospective, single-group, cohort design was used. A total of 102 early breast cancerpatients treated with chemotherapy at the Institute of Oncology Ljubljana were included. Of those, 71% returned thequestionnaires after one-year post-chemotherapy. The Slovenian versions of the European Organisation for Researchand Treatment of Cancer (EORTC) QLQ C30 and BR23 questionnaires were used. Primary outcomes were a com-parison of global health status/quality of life (GHS) and C30 Summary Score (C30-SumSc) at baseline and one-yearpost-chemotherapy with the normative Slovenian population. The exploratory analysis evaluated the differences insymptoms and functional scales of QLQ C-30 and QLQ BR-23 between baseline and one-year post-chemotherapy.Results. At baseline and one-year post-chemotherapy, C30-SumSc of patients was lower than the predictedC30-SumSc from the normative Slovenian population by 2.6 points (p = 0.04) and 6.5 points (p < 0.001), resp. On thecontrary, GHS was not statistically different from predicted either at baseline or after one year. Exploratory analysisrevealed that one-year post-chemotherapy compared to the beginning of chemotherapy, patients had statisticallysignificantly and clinically meaningful lower scores in body image and cognitive functioning, and increased symptomscores for pain, fatigue, and arm symptoms.Conclusions. The C30-SumSc is reduced one- year post-chemotherapy. Early interventions should be directed to-ward the prevention of the decline of cognitive functioning and body image, and to alleviate fatigue, pain, and armsymptoms.
Keywords: breast cancer, chemotherapy, quality of life
Published in DiRROS: 25.07.2024; Views: 410; Downloads: 150
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4. Morphological features of breast cancer circulating tumor cells in blood after physical and biological type of isolationTanja Jesenko, Živa Pišljar, Cvetka Grašič-Kuhar, Maja Čemažar, Urška Matkovič, Simona Miceska, Jerneja Varl, Anamarija Kuhar, Veronika Kloboves-Prevodnik, 2021, original scientific article Abstract: Background. Circulating tumor cells (CTCs) have become an important biomarker in breast cancer. Different iso-lation tech-niques based on their biological or physical features were established. Currently, the most widely used methods for visualization after their separation are based on immunofluorescent staining, which does not provide the information on the morphology.Materials and methods. The aim of this study was to evaluate how two different separation techniques affect cell morphology and to analyse cell morphology with techniques used in routine cytopathological laboratory. A direct side-by-side comparison of physical (Parsortix%) and biological (MACS%) separation technique was performed.Results. In the preclinical setting, both isolation techniques retained the viability and antigenic characteristics of MCF7 breast cancer cells. Some signs of degeneration such as cell swelling, cytoplasmic blebs, villous projections and vacuolization were observed. In metastatic breast cancer patient cohort, morphological features of isolated CTCs were dependent on the separation technique. After physical separation, CTCs with preserved cell morphology were detected. After biological separation the majority of the isolated CTCs were so degenerated that their identity was difficult to confirm.Conclusions. Taken together, physical separation is a suitable technique for detection of CTCs with preserved cell morphology for the use in a routine cytopathological laboratory.
Keywords: circulating tumor cells, breast cancer, morphology
Published in DiRROS: 22.07.2024; Views: 669; Downloads: 353
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9. Effectiveness of adjuvant trastuzumab in daily clinical practiceErika Matos, Branko Zakotnik, Cvetka Grašič-Kuhar, 2014, original scientific article Abstract: Background. Human epidermal growth factor receptor 2 (HER2) positive breast cancer is an entity with aggressive behaviour. One year of adjuvant trastuzumab significantly improves the disease free survival in the range of 40-50% and reduces the risk of dying from HER2 positive breast cancer by one third. Adjuvant treatment with trastuzumab became available in Slovenia in 2005 and the aim of this study is to explore, if the exceptional results reported in adjuvant clinical trials are achieved also in daily clinical practice. Patients and methods. An analysis of tumour and patient characteristics, type of treatment and outcome (relapse free and overall survival) of 313 patients (median age 52 years) treated at the Institute of Oncology Ljubljana in years 2005-2009 was performed. Results. Median follow-up was 4.4 years. Sixty-one patients relapsed and 24 died. Three and four years relapse free survival was 84.2% and 80.8% and the overall survival was 94.4% and 92.5%, respectively. Independent prognostic factors for relapse were tumour grade (HR 2.10; 95% CI 1.07-4.14; p = 0.031) and nodal stage (HR 1.35; 1.16-1.56; p < 0.0001) and for the overall survival nodal stage only (HR 1.36; 1.05-1.78; p = 0.021). Conclusions. The outcome in patients with adjuvant trastuzumab in daily clinical practice, treated by medical oncologists, is comparable to results obtained in international adjuvant studies.
Keywords: breast cancer, trastuzumab, adjuvant, clinical practice
Published in DiRROS: 11.04.2024; Views: 847; Downloads: 484
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