Publications by authors named "Gelderblom H"

Background: Inflammation has been reported to drive cancer-related fatigue (CRF). As both obesity and chemotherapy promote inflammatory responses, obese cancer patients may be at risk of more severe CRF, especially when receiving chemotherapy.

Methods: We analysed data of 333 colon cancer patients from four hospitals in the Netherlands (data derived from the PROCORE study).

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  • Pexidartinib is a drug used for treating tenosynovial giant cell tumor (TGCT) in patients where surgery isn't an option, and this study looked at the effects of stopping and then restarting the medication.
  • It was a phase 4 global study involving patients who had benefited from pexidartinib, allowing them to either continue treatment or stop with the option to restart later, monitoring their tumor progression and quality of life.
  • Results showed that while about 54.5% of patients who stopped the drug experienced disease progression, none of those who continued treatment saw their condition worsen over a 24-month period.
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Purpose: To provide patients with MET-mutated advanced non-small cell lung cancer (METmut aNSCLC) access to crizotinib, further substantiate evidence of its efficacy and safety in this setting, and find potential biomarkers for nonresponse.

Patients And Methods: In the Drug Rediscovery Protocol (NCT0295234), patients with an actionable molecular profile are treated with off-label registered drugs. Both treated and untreated patients with aNSCLC harboring MET exon 14 skipping or other MET mutations received crizotinib 250 mg BID until disease progression or intolerable toxicity.

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Tenosynovial giant cell tumor (TGCT) is a rare, locally invasive soft tissue tumor arising from the synovium of joints, bursa and tendon sheaths and is associated with the overexpression of the (CSF-1) gene. Pimicotinib is an orally available, highly selective and potent small molecule CSF-1 receptor (CSF-1R) inhibitor with robust efficacy and safety profile in patients with TGCT and is under development in multiple diseases. In an open-label Phase I study in patients with TGCT not amenable to surgery, pimicotinib showed superior efficacy and safety.

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Background: The HVTN 705 Imbokodo trial of 2636 people without HIV and assigned female sex at birth, conducted in southern Africa, evaluated a heterologous HIV-1 vaccine regimen: mosaic adenovirus 26-based vaccine (Ad26.Mos4.HIV) at Months 0, 3, 6, 12 and alum-adjuvanted clade C gp140 at Months 6, 12.

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Somatic activating mutations drive most gastrointestinal stromal tumors (GISTs). Disease progression eventually develops with first-line imatinib, commonly due to secondary mutations, and different kinase inhibitors have various levels of treatment efficacy dependent on specific acquired resistance mutations. Ripretinib is a broad-spectrum switch-control KIT/PDGFRA tyrosine kinase inhibitor for patients with advanced GIST who received prior treatment with three or more kinase inhibitors, including imatinib.

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Since the mid-1980s, there has been little progress in improving survival of patients diagnosed with osteosarcoma. Survival prediction models play a key role in clinical decision-making, guiding healthcare professionals in tailoring treatment strategies based on individual patient risks. The increasing interest of the medical community in using machine learning (ML) for predicting survival has sparked an ongoing debate on the value of ML techniques versus more traditional statistical modelling (SM) approaches.

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Background: The Alpe-DPD study (NCT02324452) demonstrated that prospective genotyping and dose-individualization using four alleles in DPYD (DPYD*2A/rs3918290, c.1236G > A/rs75017182, c.2846A > T/rs67376798 and c.

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Introduction: Treating older adults with chemotherapy remains a challenge, given their under-representation in clinical trials and the lack of robust treatment guidelines for this population. Moreover, older patients, especially those with frailty, have an increased risk of developing chemotherapy-related toxicity, resulting in a decreased quality of life (QoL), increased hospitalisations and high healthcare costs. Phase II trials have suggested that upfront dose reduction of chemotherapy can reduce toxicity rates while maintaining efficacy, leading to fewer treatment discontinuations and an improved QoL.

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Historically, dose selection of anticancer drugs has mainly been based on establishing the maximum tolerated dose in phase 1 clinical trials with a traditional 3 plus 3 design. In the era of targeted therapies and immune-modulating agents, this approach does not necessarily lead to selection of the most favourable dose. This strategy can introduce potentially avoidable toxicity or inconvenience for patients.

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During atmospheric pressure plasma impingement, plasma induced liquid flow will influence the transport and distribution of plasma generated charged and reactive species in liquids. We use particle image velocimetry and supplementary pH, conductivity and temperature measurements to investigate electrical properties of an AC kHz plasma jet interacting with water and electrolytes. We observe that the dominant driving mechanism in low conductive solutions are surface forces such as shear stresses and stagnation-pressure induced dimpling.

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  • * This study develops a dynamic prediction model for 5-year overall survival, using data from 1965 patients and incorporating both baseline factors and time-varying events like local recurrence and new metastatic disease.
  • * Key findings reveal that certain baseline factors and disease-related variables significantly impact survival, emphasizing the value of updating predictions based on new information gathered during patient follow-up.
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Introduction: Ewing sarcoma (ES), is a rare cancer affecting children, adolescents and adults. After VIDE (vincristine-ifosfamide-doxorobucin-etoposide) induction chemotherapy, Busulfan-Melphalan (BuMel) high-dose chemotherapy followed by autologous hematopoietic stem cells transplantation improved outcomes in unfavourable localized ES, but with more toxicities than conventional chemotherapy (VAI: Vincristine-dactinomycin-Ifosfamide). We evaluated whether the risk of acute toxicity associated with BuMel compared to VAI varied according to age in patients recruited in the R2Loc and R2Pulm randomised trials of the Euro-E.

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Purpose: The treatment efficacy of nivolumab was evaluated in patients with advanced, treatment-refractory solid mismatch repair deficiency/microsatellite-instable (dMMR/MSI) tumors, and in-depth biomarker analyses were performed to inform precision immunotherapy approaches.

Patients And Methods: Patients with dMMR/MSI tumors who exhausted standard-of-care treatment options were enrolled in the Drug Rediscovery Protocol, a pan-cancer clinical trial that treats patients with cancer based on their tumor molecular profile with off-label anticancer drugs (NCT02925234). Patients received nivolumab (four cycles of 240 mg every 2 weeks, thereafter 480 mg every 4 weeks).

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Osteosarcoma is a primary bone tumor that exhibits a complex genomic landscape characterized by gross chromosomal abnormalities. Osteosarcoma patients often develop metastatic disease, resulting in limited therapeutic options and poor survival rates. To gain knowledge on the mechanisms underlying osteosarcoma heterogeneity and metastatic process, it is important to obtain a detailed profile of the genomic alterations that accompany osteosarcoma progression.

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Background: Adolescents and young adults (AYAs) with Ewing sarcoma have a worse prognosis than children. Population-based survival evaluations stratifying findings by important clinical factors are, however, limited. This Dutch population study comprehensively compared survival of children and AYAs with Ewing sarcoma over three decades considering diagnostic period, tissue of origin, tumor site, and disease stage.

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Introduction And Objective: Pazopanib is registered for metastatic renal cell carcinoma and soft-tissue sarcoma (STS). Its variable pharmacokinetic (PK) characteristics and narrow therapeutic range provide a strong rationale for therapeutic drug monitoring (TDM). Prior studies have defined target levels of drug exposure (≥ 20.

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  • TGCT is a challenging tumor to treat, primarily managed through surgery, but there are few options for patients who can't have surgery; this study investigates vimseltinib, a new oral medication targeting the CSF1 receptor.
  • Conducted as a phase I/II trial with 69 patients (37 with various malignant tumors and 32 with TGCT), the study aimed to evaluate the safety, tolerability, and pharmacokinetics of vimseltinib, while looking at its potential effectiveness.
  • The results showed that vimseltinib was generally well tolerated with a recommended dose of 30 mg taken twice a week, and achieved a 72% objective response rate in TGCT patients, demonstrating promising
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Background: Therapeutic drug monitoring (TDM) - performing dose adjustments based on measured drug levels and established pharmacokinetic (PK) targets - could optimise treatment with drugs that show large interpatient variability in exposure. We evaluated the feasibility of TDM for multiple oral targeted therapies. Here we report on drugs for which routine TDM is not feasible.

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Purpose: Although eligibility criteria are essential in trial design, overly restrictive criteria contribute to low accrual and limited generalizability. To enhance trial inclusivity, there has been growing interest in broadening eligibility criteria, especially for patients with advanced or treatment-refractory disease. Yet, the impact on patient safety remains uncertain.

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  • - Rates of new HIV infections are still too high globally, despite advancements in treatment and prevention methods, and scaling up these interventions has not kept pace with the goal to end AIDS by 2030.
  • - Major challenges include low population coverage, adherence issues to preventive measures like oral pre-exposure prophylaxis, and new infections occurring in unsuspected populations.
  • - While new treatments like long-acting injectables show promise, a vaccine or vaccine-like strategy appears to be the best way to significantly reduce HIV incidence, especially in countries facing widespread epidemics, highlighting a need for stronger global efforts and advocacy.
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Background: The decreased perfusion of osteosarcoma in dynamic contrast-enhanced (DCE) MRI, reflecting a good histological response to neoadjuvant chemotherapy, has been described.

Purpose: In this study, we aim to explore the potential of the relative wash-in rate as a prognostic factor for event-free survival (EFS).

Methods: Skeletal high-grade osteosarcoma patients, treated in two tertiary referral centers between 2005 and 2022, were retrospectively included.

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  • Osteosarcoma and Ewing sarcoma are challenging bone tumors primarily affecting younger individuals, with low survival rates even after various treatment approaches.
  • Current research on targeted therapies and immunotherapies has been ineffective, highlighting the need for a deeper understanding of the tumor biology and the immune microenvironment.
  • A new Europe-wide framework for systematic sampling and analysis of patient samples has been proposed, supported by international consortia aiming to set guidelines that will enhance research collaboration and ultimately improve treatment outcomes.
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  • Various biomarker tests have been created to identify ideal candidates for PARP-inhibitor therapy but lack standardization, making it hard to assess their clinical value.
  • The inconsistency in biomarker definitions, varying cutoff points, and unknown factors complicate treatment decisions.
  • The article suggests aligning biomarker definitions and performance standards to promote fair access to precision medicine.
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  • Tenosynovial giant cell tumour (TGCT) is a locally aggressive tumor with limited treatment options, leading this study to assess vimseltinib, a CSF1R inhibitor, in patients whose TGCT symptoms prevent surgery.
  • The MOTION trial, a phase 3 randomized study, involved 123 adults from 35 hospitals globally, comparing vimseltinib to a placebo over 24 weeks, focusing on the objective response rate determined by independent radiological review.
  • Results showed a significant objective response rate of 40% for vimseltinib compared to 0% for placebo, with most side effects being mild (grade 1 or 2), highlighting vimseltinib's
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