Publications by authors named "Michael Gregor"

Venetoclax-obinutuzumab (Ven-Obi) is a standard first-line therapy for chronic lymphocytic leukemia (CLL). The impact of age, fitness, and dose reductions remains unclear. We analyzed patients treated with Ven-Obi in the CLL13 and CLL14 trials, excluding patients with TP53 aberrations.

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The combination of ibrutinib plus venetoclax (IV) in chronic lymphocytic leukemia (CLL) treatment leverages their complementary mechanisms of action. Studies investigating IV typically begin with a short initial course of ibrutinib, followed by venetoclax introduction for a limited duration, typically 12 months. The Swiss Group for Clinical Cancer Research (SAKK) 34/17 study is a single-arm, multicenter, phase 2 trial evaluating the effectiveness of a modified IV schedule in patients with relapsed/refractory (R/R) CLL.

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Purpose: Surrogate end points are commonly used to estimate treatment efficacy in clinical studies of chronic lymphocytic leukemia (CLL). This patient- and trial-level analysis describes the correlation between progression-free survival (PFS) and minimal residual disease (MRD) with overall survival (OS) in first-line trials for CLL.

Patients And Methods: First, patient-level correlation was confirmed using source data from 12 frontline German CLL Study Group (GCLLSG)-trials.

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Article Synopsis
  • The GAIA/CLL13 trial found that venetoclax-obinutuzumab and venetoclax-obinutuzumab-ibrutinib combinations led to better undetectable measurable residual disease (MRD) rates and longer progression-free survival compared to traditional chemoimmunotherapy for untreated chronic lymphocytic leukaemia (CLL) patients.
  • The trial was a phase 3 study involving 159 sites across Europe and the Middle East, enrolling patients aged 18 and older with specific health criteria and assigning them to different treatment groups, including standard chemoimmunotherapy and various venetoclax-based combinations.
  • All treatment regimens were administered in cycles, with detailed protocols for each group, specifically focusing on
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We evaluated the chronic lymphocytic leukemia International Prognostic Index (CLL-IPI) in patients with CLL treated first line with targeted drugs (n = 991) or chemoimmunotherapy (n = 1256). With a median observation time of 40.5 months, the 3-year progression-free survival (PFS) rates for targeted drug-treated patients varied by CLL-IPI risk group: 96.

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We previously demonstrated that a reduced-intensity chemotherapy schedule can safely replace hyper-CVAD (cyclophosphamide-vincristine-doxorubicin [Adriamycin]-dexamethasone) cycle 1 when combined with imatinib in adults with Philadelphia-positive acute lymphoblastic leukemia. In the present randomized GRAAPH-2014 trial, we used nilotinib and addressed the omission of cytarabine (Ara-C) in consolidation. The primary objective was the major molecular response (MMR) rate measured by BCR::ABL1 quantification after cycle 4 (end of consolidation).

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Background: Patients with newly diagnosed high-risk Burkitt lymphoma are treated with high-intensity immune-chemotherapy regimens such as R-CODOX-M/R-IVAC or with lower-intensity regimens such as DA-EPOCH-R. The aim of this study was to make a formal comparison between these regimens.

Methods: This multicentre, phase 3, open-label, randomised study was done in 26 clinical centres in the Netherlands, Belgium, and Switzerland.

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Article Synopsis
  • Complex karyotypes (CKTs) and highly complex karyotypes (hCKTs) are significant predictors of worse outcomes in chronic lymphocytic leukemia (CLL) when treated with chemoimmunotherapy, and their impact is further explored in venetoclax-based therapies.
  • * In a study involving 895 patients, CKTs were linked to shorter progression-free survival (PFS) and overall survival (OS) in the CIT group, while hCKTs negatively affected PFS in the venetoclax group.
  • * The findings suggest that karyotype analysis should be included in standard CLL diagnostics to better identify patients at high risk for poor treatment outcomes, supporting more personalized treatment approaches.
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Article Synopsis
  • The study investigates the effectiveness of venetoclax combined with anti-CD20 antibodies in fit patients with advanced chronic lymphocytic leukemia (CLL), compared to traditional chemoimmunotherapy.
  • In a phase 3 trial with 926 participants, various treatment regimens were compared, emphasizing the primary goals of achieving undetectable minimal residual disease and prolonging progression-free survival.
  • Results showed that venetoclax combinations significantly outperformed chemoimmunotherapy in terms of undetectable minimal residual disease rates and 3-year progression-free survival, especially in the venetoclax-obinutuzumab-ibrutinib group.
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Objective: This study aimed to provide an extensive overview of clinical and pathological findings along with various therapeutic options analyzing in addiction, retrospectively, the surgical outcomes of a single center cohort.

Background: Thymic neoplasms are rare thoracic tumors which commonly are located in the anterior mediastinum and are associated with a wide spectrum of clinical presentations. They may run an indolent course or could present a very aggressive biologic progression with infiltration of mediastinal structures and presence of distant metastases.

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Lenalidomide, an antineoplastic and immunomodulatory drug, has therapeutic activity in acute myeloid leukemia (AML), but definitive studies about its therapeutic utility have been lacking. In a phase 3 study, we compared 2 induction regimens in newly diagnosed patients age 18 to 65 years with AML: idarubicine-cytarabine (cycle 1) and daunorubicin and intermediate-dose cytarabine (cycle 2) without or with lenalidomide (15 mg orally on days 1-21). One final consolidation cycle of chemotherapy or autologous stem cell transplantation (auto-SCT) or allogeneic SCT (allo-SCT) was provided according to a prognostic risk and minimal residual disease (MRD)-adapted approach.

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Treatment results of AML in elderly patients are unsatisfactory. We hypothesized that addition of tosedostat, an aminopeptidase inhibitor, to intensive chemotherapy may improve outcome in this population. After establishing a safe dose in a run-in phase of the study in 22 patients, 231 eligible patients with AML above 65 years of age (median 70, range 66-81) were randomly assigned in this open label randomized Phase II study to receive standard chemotherapy (3+7) with or without tosedostat at the selected daily dose of 120 mg ( = 116), days 1-21.

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In recent years, considerable progress has been made in frontline therapy for elderly/physically unfit patients with CLL. The combination of obinutuzumab and chlorambucil (O-Clb) has been shown to prolong progression free survival (PFS, median PFS-31.5 months) and overall survival (OS) compared to chlorambucil alone.

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Fludarabine, cyclophosphamide and rituximab (FCR) was compared to bendamustine and rituximab (BR) in an international, randomized, open label, phase 3 trial in 561 previously untreated, fit patients with chronic lymphocytic leukemia (CLL) without del (17p). Primary endpoint was progression free survival (PFS). The final primary endpoint analysis after 37.

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Acute Myeloid Leukaemia (AML) is a rare and heterogeneous haematological malignancy with increasing incidence in the elderly. We performed a population-based, observational analysis of AML cases reported to the Cantonal Cancer Registries in Switzerland. Data was aggregated by the National Institute for Epidemiology and Cancer Registration and stratified for the two time periods 2001-2007 and 2008-2013.

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Objective: To evaluate the perioperative course of urine levels of the renal damage biomarkers tissue inhibitor of metalloproteinase 2 (TIMP-2) and insulin-like growth factor-binding protein 7 (IGFBP7) and to evaluate the predictive value of elevated TIMP-2 × IGFBP7 concentrations to predict acute kidney injury (AKI) early after cardiac on-pump surgery.

Design: Prospective, observational cohort study.

Setting: University hospital.

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Chemotherapy has long been integral to the treatment of chronic lymphocytic leukemia (CLL). Fludarabine/cyclophosphamide, chlorambucil and bendamustine are commonly used as a backbone, depending on the patient's age and general health. The advent of the anti-CD20 monoclonal antibodies, such as rituximab and obinutuzumab, altered the face of treatment, and chemoimmunotherapy still forms the current standard first-line approach.

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Objectives: This study aimed to evaluate the pharmacokinetic profiles of sevoflurane and isoflurane during use of minimized extracorporeal circulation to perform coronary artery bypass graft surgery. Furthermore, cardiovascular stability during bypass and the postoperative release of troponins were evaluated.

Design: Prospective, randomized study.

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Background: Chemoimmunotherapy with fludarabine, cyclophosphamide, and rituximab is the standard therapy for physically fit patients with advanced chronic lymphocytic leukaemia. This international phase 3 study compared the efficacy and tolerance of the standard therapy with a potentially less toxic combination consisting of bendamustine and rituximab.

Methods: Treatment-naive fit patients with chronic lymphocytic leukaemia (aged 33-81 years) without del(17p) were enrolled after undergoing a central screening process.

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Reduced aspirin responsiveness (i.e. persistent high platelet reactivity in platelet function testing) might be associated with increased risk of myocardial ischemia and cardiac mortality in patients with coronary disease.

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