1. Učinkovitost in varnost zdravljenja s trastuzumab derukstekanom : analiza podatkov iz realnega svetaNina Privšek, Simona Borštnar, Cvetka Grašič-Kuhar, 2024, original scientific article Abstract: Nova generacija zdravil, ki se imenuje konjugat protitelesa in zdravila (ADC), trenutno predstavlja eno najučinkovitejših zdravil pri zdravljenju raka. Usmerjena je proti specifični tarči (antigenu), selektivno izraženi na tumorski celici, po vezavi nanjo sledi tarčna znotrajcelična dostava citostatika, ki povzroči celično smrt. Pri razsejanem raku dojk je ADC z imenom trastuzumab derukstekan (T-DXd) pokazal izjemno učinkovitost v več raziskavah pod imenom DESTINY. Naprej so bili na voljo podatki pri razsejanem HER2+ raku dojk, kasneje še pri drugih HER2+ solidnih rakih ter nato še pri raku dojk z nizko izraženostjo HER2. V prispevku predstavljamo prve podatke o učinkovitosti in varnosti T-DXd v Sloveniji. V retrospektivno raziskavo smo vključili bolnike, zdravljene na Onkološkem inštitutu Ljubljana od novembra 2021 do aprila 2024. Ugotavljamo dobre odgovore na zdravljenje (objektivni odgovor 59 % pri HER2+ raku dojk, 38 % pri drugih HER2+ solidnih rakih ter 33 % pri nizkem izražanju HER2). Po kratkem srednjem času spremljanja 8,8 (95 % IZ 0,8–33,3) meseca je preživetje brez progresa v realnem svetu (rwPFS) 13 mesecev pri HER2+ raku dojk, 5,8 meseca pri raku dojk z nizko izraženostjo HER2 in 7,7 meseca pri ostalih solidnih HER2+ ali HER2 mutiranih rakih. Varnostni profil je v skladu s poročili v registracijskih raziskavah, razen za pnevmonitis, ki smo ga beležili v bistveno nižjem odstotku (le 1 %). Zaključimo lahko, da je kljub poznim linijam zdravljenja in heterogeni populaciji delež odgovorov na T-DXd visok, ocena rwPFS pa je ob kratkem času spremljanja še nezanesljiva.
Keywords: rak dojk, HER2, trastuzumab derukstekan
Published in DiRROS: 21.05.2025; Views: 469; Downloads: 196
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2. 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: 1403; Downloads: 615
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3. Cardiotoxicity of concomitant radiotherapy and trastuzumab for early breast cancerTanja Marinko, Jure Dolenc, Cvetka Bilban-Jakopin, 2014, original scientific article Abstract: Background. Trastuzumab therapy given in combination with one of several chemotherapy regimens is currently considered the standard of care for the treatment of early-stage, human epidermal growth factor receptor-2 (HER2) -positive breast cancer. The treatment with trastuzumab is due to a significant impact on the survival part of the standard adjuvant treatment of patients with HER2-positive breast cancer. Patients treated with postoperative breast or chest wall irradiation receive trastuzumab concomitant with radiotherapy. In a small proportion of patients trastuzumab causes cardiotoxicity. Preclinical findings indicate a radiosensibilizing effect of trastuzumab in breast cancer cells, but it is not yet clear whether it radiosensibilizes cells of healthy tissues too.Conclusions. Special attention is required when left breast or left thoracic wall is irradiated in patient receiving trastuzumab, because long-term effects of the concurrent treatment with trastuzumab and radiotherapy are not yet known. In an era where more patients are surviving a diagnosis of breast cancer, better understanding and earlier detection of therapy-induced cardiac toxicity will be of paramount importance.
Keywords: radiotherapy, cardiotoxicity, trastuzumab, early breast cancer
Published in DiRROS: 11.04.2024; Views: 1203; Downloads: 611
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