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1.
Semin Radiat Oncol ; 34(2): 172-179, 2024 Apr.
Article in English | MEDLINE | ID: mdl-38508782

ABSTRACT

There is a misconception that sarcomas are resistant to radiotherapy. This manuscript summarizes available (pre-) clinical data on the radiosensitivity of soft tissue sarcomas. Currently, clinical practice guidelines suggest irradiating sarcomas in 1.8-2 Gy once daily fractions. Careful observation of myxoid liposarcomas patients during preoperative radiotherapy led to the discovery of this subtype's remarkable radiosensitivity. It resulted subsequently in an international prospective clinical trial demonstrating the safety of a reduced total dose, yet still delivered with conventional 1.8-2 Gy fractions. In several areas of oncology, especially for tumors of epithelial origin where radiotherapy plays a curative role, the concurrent application of systemic compounds aiming for radiosensitization has been incorporated into routine clinical practice. This approach has also been investigated in sarcomas and is summarized in this manuscript. Observing relatively low α/ß ratios after preclinical cellular investigations, investigators have explored hypofractionation with daily doses ranging from 2.85-8.0 Gy per day in prospective clinical studies, and the data are presented. Finally, we summarize work with mouse models and genomic investigations to predict observed responses to radiotherapy in sarcoma patients. Taken together, these data indicate that sarcomas are not resistant to radiation therapy.


Subject(s)
Sarcoma , Animals , Mice , Humans , Combined Modality Therapy , Prospective Studies , Sarcoma/radiotherapy , Sarcoma/drug therapy , Sarcoma/pathology , Radiation Tolerance
2.
Eur J Surg Oncol ; 49(9): 106926, 2023 09.
Article in English | MEDLINE | ID: mdl-37173151

ABSTRACT

BACKGROUND: The pro-inflammatory cytokine interleukin-6 (IL-6) plays a role in cancer development and progression, but research into the predictive value of IL-6 on postoperative outcome in soft tissue sarcoma (STS) is scarce. The purpose of this study is to investigate the predictive value of serum IL-6 level for the achievement of assumed (post)operative outcome after STS surgery, the so-called textbook outcome. METHODS: Preoperative IL-6 serum levels were collected in all patients with a STS at first presentation between February 2020 and November 2021. Textbook outcome was defined as a R0 resection, no complications, no blood transfusions, no reoperation within the postoperative period, no prolonged hospital stay, no hospital readmission within 90-days, and no mortality within 90-days. Factors associated with textbook outcome were determined by multivariable analysis. RESULTS: Among 118 patients with primary, non-metastatic STS, 35.6% achieved a textbook outcome. Univariate analysis showed that smaller tumor size (p = 0.026), lower tumor grade (p = 0.006), normal hemoglobin (Hb, p = 0.044), normal white blood cell (WBC) count (p = 0.018), normal C-reactive protein (CRP) serum level (p = 0.002) and normal IL-6 serum level (p = 1.5 × 10-5) were associated with achieving textbook outcome after surgery. Multivariable analysis showed that elevated IL-6 serum level (p = 0.012) was significantly associated with not achieving a textbook outcome. CONCLUSIONS: Increased IL-6 serum level is predictive for not achieving a textbook outcome after surgery for primary, non-metastatic STS.


Subject(s)
Sarcoma , Soft Tissue Neoplasms , Humans , Interleukin-6 , Prognosis , Sarcoma/pathology , Soft Tissue Neoplasms/pathology , Cytokines
3.
Ann Hematol ; 102(1): 99-106, 2023 Jan.
Article in English | MEDLINE | ID: mdl-36409328

ABSTRACT

The prognostic impact of monocytosis has not yet been determined in patients with myelodysplastic syndromes (MDS). We examined absolute monocyte counts in the peripheral blood at the time of diagnosis in 1949 patients with a bone marrow blast count < 5%, a condition we call MDS < EB1 (MDS with a blast percentage lower than that of MDS with excess blasts 1, according to the WHO classification). Monocytosis (> 600/µl) was associated with higher median hemoglobin, WBC, and ANC, and more favorable karyotype (p = .001). Nevertheless, monocytosis was associated with shorter overall survival (OS) (108 vs. 126 months, p = .002) and earlier transformation into AML (p < .001). In patients with sideroblastic phenotype, the percentage of ring sideroblasts significantly correlated with the monocyte count (p = .005), and OS was significantly shorter when monocytosis was documented (88 vs. 132 months, p = .004). The survival disadvantage of patients with MDS < EB1 and peripheral blood monocytosis suggests that these patients suffer from a CMML-like disease. Even though they are generally classified as MDS with persistent monocytosis, such patients should be considered candidates for therapeutic options employed in CMML.


Subject(s)
Bone Marrow , Myelodysplastic Syndromes , Humans , Prognosis , Myelodysplastic Syndromes/therapy , Myelodysplastic Syndromes/drug therapy , Leukocytosis , Leukocyte Count
4.
Eur J Surg Oncol ; 49(2): 339-344, 2023 02.
Article in English | MEDLINE | ID: mdl-36085118

ABSTRACT

INTRODUCTION: Patients with locally extensive high-grade extremity soft tissue sarcomas (eSTS) are often presented in multidisciplinary teams to decide between ablative surgery (amputation) or limb-salvage surgery supplemented with either neo-adjuvant radiotherapy (RT) or induction isolated limb perfusion (ILP). In The Netherlands, ILP typically aims to reduce the size of tumors that would otherwise be considered irresectable, whereas neo-adjuvant RT aims mainly at improving local control and reducing morbidity of required marginal margins. This study presents a 15-year nationwide cohort to describe the oncological outcomes of both pre-operative treatment strategies. METHODS: All consecutive patients with locally extensive primary high-grade eSTS surgically treated between 2000 and 2015 at five tertiary sarcoma centers that received neo-adjuvant ILP or RT were included. 169 patients met the inclusion criteria (89 ILP, 80 RT). Median follow-up was 7.3 years. RESULTS: Limb salvage was achieved in 84% of cases in the ILP group (80% for patients with amputation indication) and 96% of cases in the RT group. 5-Year overall survival was 47% in the ILP group, 69% in the RT group. 5-Year local recurrence rate was 14% in the ILP group, 10% in the RT group. Distant metastasis rate was 55% in the ILP group, 36% in the RT group. CONCLUSION: We find oncological outcomes and limb salvage rates in line with existing literature for both treatment modalities. Whether the tumor was locally advanced with an indication for induction therapy to prevent amputation or morbid surgery appeared to be the main determinant in choosing between neo-adjuvant ILP or RT.


Subject(s)
Sarcoma , Soft Tissue Neoplasms , Humans , Radiotherapy, Adjuvant , Melphalan , Chemotherapy, Cancer, Regional Perfusion/adverse effects , Tumor Necrosis Factor-alpha , Sarcoma/surgery , Soft Tissue Neoplasms/surgery , Extremities/pathology , Limb Salvage , Perfusion , Neoplasm Recurrence, Local/surgery
5.
Eur J Surg Oncol ; 49(6): 1111-1114, 2023 06.
Article in English | MEDLINE | ID: mdl-36115783

ABSTRACT

Primary non-metastatic retroperitoneal soft tissue sarcoma patients can be cured by radical surgery. However there remains a risk for patients to develop a local recurrence. To minimize this risk, patients with low grade liposarcomas might benefit from preoperative radiotherapy. This review summarizes all issues that should be considered for the irradiation of patients with retroperitoneal soft tissue sarcoma.


Subject(s)
Liposarcoma , Retroperitoneal Neoplasms , Sarcoma , Humans , Sarcoma/radiotherapy , Sarcoma/surgery , Sarcoma/pathology , Liposarcoma/radiotherapy , Liposarcoma/surgery , Retroperitoneal Neoplasms/radiotherapy , Retroperitoneal Neoplasms/surgery , Retroperitoneal Neoplasms/pathology , Neoplasm Recurrence, Local/pathology , Radiotherapy Dosage , Radiotherapy, Adjuvant
7.
Science ; 378(6615): 49-56, 2022 10 07.
Article in English | MEDLINE | ID: mdl-36108050

ABSTRACT

Although deep learning has revolutionized protein structure prediction, almost all experimentally characterized de novo protein designs have been generated using physically based approaches such as Rosetta. Here, we describe a deep learning-based protein sequence design method, ProteinMPNN, that has outstanding performance in both in silico and experimental tests. On native protein backbones, ProteinMPNN has a sequence recovery of 52.4% compared with 32.9% for Rosetta. The amino acid sequence at different positions can be coupled between single or multiple chains, enabling application to a wide range of current protein design challenges. We demonstrate the broad utility and high accuracy of ProteinMPNN using x-ray crystallography, cryo-electron microscopy, and functional studies by rescuing previously failed designs, which were made using Rosetta or AlphaFold, of protein monomers, cyclic homo-oligomers, tetrahedral nanoparticles, and target-binding proteins.


Subject(s)
Deep Learning , Protein Engineering , Proteins , Amino Acid Sequence , Cryoelectron Microscopy , Crystallography, X-Ray , Protein Conformation , Protein Engineering/methods , Proteins/chemistry
8.
Clin Radiol ; 77(6): 428-435, 2022 06.
Article in English | MEDLINE | ID: mdl-35367052

ABSTRACT

AIM: To synthesise the available evidence about the effects of modifications to diagnostic imaging reports that aim to optimise patient care. MATERIALS AND METHODS: Cochrane methods were used and CENTRAL, MEDLINE, EMBASE, and clinical trials registers were searched from inception to 31 March 2021. Randomised controlled trials of modifications to imaging reports aimed at optimising patient care for any condition were included. Two authors selected studies independently for inclusion, extracted data, assessed risk of bias, and judged certainty of evidence using GRADE. The primary outcome was quality of care (e.g., increased guideline-adherent care, reduced/increased imaging as appropriate). RESULTS: Five trials met eligibility criteria. One tested provision of information about appropriate osteoporosis treatment in bone density reports; two tested provision of criteria and treatment for heart failure in echocardiogram reports; one tested provision of reminders for when routine imaging is not needed in lumbar spine and knee radiography reports; and one tested inclusion of epidemiological data in lumbar spine imaging reports. All trials were susceptible to bias, and four did not blind all participants. Low certainty evidence from two trials found adding information about appropriate care may increase care quality compared to a standard report (RR 1.20 (95% CI 0.96 to 1.50), two trials, 1,548 participants, I2 = 49). This was supported by outcomes of two additional trials that also provided specific clinical guidance. CONCLUSIONS: The present review suggests that providing specific guidance on appropriate clinical intervention in imaging reports may improve patient care. Further high-quality trials are needed to confirm these findings. Prospective PROSPERO registration CRD42020153961.


Subject(s)
Bone Density , Quality of Health Care , Diagnostic Imaging , Humans , Prospective Studies , Radiography
9.
Ann Hematol ; 101(5): 1031-1038, 2022 May.
Article in English | MEDLINE | ID: mdl-35262868

ABSTRACT

Myelodysplastic syndromes (MDS) and acute myeloid leukemia (AML) can be late complications following mutagenic treatment. Limited data is available on the outcome of patients developing therapy-related MDS and AML after treatment for multiple myeloma (MM). We identified 250 patients with therapy-associated MDS or AML in the Duesseldorf MDS registry. Of those, 50 patients were previously diagnosed with multiple myeloma (mm-MDS/AML). We compared them to patients with de novo MDS (n = 4862) and to patients with MDS following other underlying diseases (tMDS) (n = 200). mm-MDS patients and tMDS patients showed similar karyotypes and degrees of cytopenia. However, mm-MDS patients had significantly higher blast counts and more often belonged to the high-risk group according to the International Prognostic Scoring System (IPSS) (both p < 0.05). Although the rate of progression to AML was similar in mm-MDS and tMDS, both transformed significantly more often than de novo MDS (p < 0.05). Median overall survival of patients with mm-MDS (13 months; range: 1-99) and tMDS (13 months; range 0-160) was also similar yet significantly shorter than patients with de novo MDS (32 months; range 0-345 months; p < 0.05). Furthermore, survival of mm-MDS patients was not affected by myeloma activity. Despite significantly more high-risk disease and higher blast cell counts, myeloma-associated MDS-patients show features akin to other tMDS. Survival is similar to other tMDS and irrespective of myeloma remission status or transformation to AML. Thus, patient outcome is not determined by competing clones but rather by MDS governing the stem cell niche.


Subject(s)
Leukemia, Myeloid, Acute , Multiple Myeloma , Myelodysplastic Syndromes , Neoplasms, Second Primary , Humans , Karyotyping , Leukemia, Myeloid, Acute/chemically induced , Leukemia, Myeloid, Acute/diagnosis , Leukemia, Myeloid, Acute/therapy , Multiple Myeloma/complications , Multiple Myeloma/therapy , Myelodysplastic Syndromes/chemically induced , Myelodysplastic Syndromes/complications , Myelodysplastic Syndromes/therapy , Neoplasms, Second Primary/etiology
10.
BMC Gastroenterol ; 22(1): 82, 2022 Feb 25.
Article in English | MEDLINE | ID: mdl-35216547

ABSTRACT

BACKGROUND: In patients with severe polycystic liver disease (PLD), there is a need for new treatments. Estrogens and possibly other female sex hormones stimulate growth in PLD. In some patients, liver volume decreases after menopause. Female sex hormones could therefore be a target for therapy. The AGAINST-PLD study will examine the efficacy of the GnRH agonist leuprorelin, which blocks the production of estrogen and other sex hormones, to reduce liver growth in PLD. METHODS: The AGAINST-PLD study is an investigator-driven, multicenter, randomized controlled trial. Institutional review board (IRB) approval was received at the University Medical Center of Groningen and will be collected in other sites before opening these sites. Thirty-six female, pre-menopausal patients, with a very large liver volume for age (upper 10% of the PLD population) and ongoing liver growth despite current treatment options will be randomized to direct start of leuprorelin or to 18 months standard of care and delayed start of leuprorelin. Leuprorelin is given as 3.75 mg subcutaneously (s.c.) monthly for the first 3 months followed by 3-monthly depots of 11.25 mg s.c. The trial duration is 36 months. MRI scans to measure liver volume will be performed at screening, 6 months, 18 months, 24 months and 36 months. In addition, blood will be drawn, DEXA-scans will be performed and questionnaires will be collected. This design enables comparison between patients on study treatment and standard of care (first 18 months) and within patients before and during treatment (whole trial). Main outcome is annualized liver growth rate compared between standard of care and study treatment. Secondary outcomes are PLD disease severity, change in liver growth within individuals and (serious) adverse events. The study is designed as a prospective open-label study with blinded endpoint assessment (PROBE). DISCUSSION: In this trial, we combined the expertise of hepatologist, nephrologists and gynecologists to study the effect of leuprorelin on liver growth in PLD. In this way, we hope to stop liver growth, reduce symptoms and reduce the need for liver transplantation in severe PLD. Trial registration Eudra CT number 2020-005949-16, registered at 15 Dec 2020. https://www.clinicaltrialsregister.eu/ctr-search/search?query=2020-005949-16 .


Subject(s)
Leuprolide , Liver Diseases , Female , Humans , Cysts , Leuprolide/therapeutic use , Liver Diseases/drug therapy , Multicenter Studies as Topic , Prospective Studies , Randomized Controlled Trials as Topic
11.
Ann Hematol ; 101(3): 607-616, 2022 Mar.
Article in English | MEDLINE | ID: mdl-34982196

ABSTRACT

Primary central nervous system non-Hodgkin lymphomas (PCNS-NHLs) are extranodal B-cell lymphomas with poor prognosis. The role of high-dose therapy (HDT) followed by autologous blood stem cell transplantation (ASCT) as first-line therapy is still not clear. We retrospectively collected long-term follow up data of 61 consecutive patients with PCNS-NHL at the University Hospital Düsseldorf from January 2004 to December 2016. Thirty-six patients were treated with conventional chemoimmunotherapy (cCIT) only (CT-group). Seventeen patients received an induction cCIT followed by HDT and ASCT. In the CT-group, the overall response rate (ORR) was 61% (CR 47%, PR 14%), and there were 8% treatment-related deaths (TRD). Progression-free survival (PFS) was 31.8 months, and overall survival (OS) was 57.3 months. In the HDT-group, the ORR was 88% (59% CR, 29% PR), and there were 6% TRD. Median PFS and OS were not reached at 5 years. The 5-year PFS and OS were 64.7%. After a median follow up of 71 months, 10 patients (59%) were still alive in CR/PR following HDT and ASCT, one patient was treated for progressive disease (PD), and 7 had died (41%, 6 PD, 1 TRD). All patients achieving CR prior to HDT achieved durable CR. In the CT-group, 8 patients (22%) were alive in CR/PR after a median follow-up of 100 months. Twenty-eight patients died (78%, 24 PD, 2 TRD, 2 deaths in remission). In the univariate analysis, the HDT-group patients had significantly better PFS (not reached vs 31.8 months, p = 0.004) and OS (not reached vs 57.3 months, p = 0.021). The multivariate analysis showed HDT was not predictive for survival. Treatment with HDT + ASCT is feasible and offers the chance for long-term survival with low treatment-related mortality in younger patients. In this analysis, ORR, PFS and OS were better with HDT than with conventional cCIT alone. This result was not confirmed in the multivariate analysis, and further studies need to be done to examine the role of HDT in PCNSL.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Central Nervous System Neoplasms/therapy , Hematopoietic Stem Cell Transplantation , Lymphoma, Non-Hodgkin/therapy , Aged , Female , Humans , Male , Middle Aged , Progression-Free Survival , Retrospective Studies , Transplantation, Autologous
12.
Leuk Res ; 112: 106757, 2022 01.
Article in English | MEDLINE | ID: mdl-34864369

ABSTRACT

We studied 79 patients with AML-MRC or RAEB-T, who were later reclassified according to the WHO classification. Marrow slides were examined cytomorphologically with regard to dysplasia. Patients were followed up until March 2020. Thirty-one patients underwent allogeneic stem cell transplantation (median survival (ms) 16 months), 14 were treated with induction chemotherapy (ms 8.4 months), 18 received hypomethylating agents (ms 9.2 months), 16 received low dose chemotherapy or best supportive care (ms 2.4 months). Only 30.4 % fulfilled the morphologic WHO criteria. 46.8 % were classified as AML-MRC by an antecedent MDS, 54.4 % of the pts were classified by MDS-related chromosomal abnormalities. 5 % did not fulfill any of the criteria and were entered based on 20-29 % medullary blasts. There was no difference in ms between pts presenting with > 50 % dysplasia as compared to pts with dysplasia between 10 % and 50 % (ms 9.1 vs 9.9 months, p = n.s.) or for pts with antecedent MDS (ms 9.1 vs 8.9 months, p = n.s.). Myelodysplasia-related cytogenetic abnormalities were associated with a worse outcome (ms 8.1 vs 13.5 months, p = 0.026). AML-MRC in its current definition is a heterogenous entity. Dysplasia of ≥ 50 % in ≥ two lineages is not helpful for diagnostics and prognostication and therefore should be deleted in future classifications. We recommend utilizing the WHO guidelines for defining dysplasia (10 % or greater in ≥ 1 of the three myeloid cell lines) assisting in establishing the diagnosis of MDS.


Subject(s)
Anemia, Refractory, with Excess of Blasts/genetics , Hematopoietic Stem Cell Transplantation/methods , Leukemia, Myeloid/genetics , Myelodysplastic Syndromes/genetics , Acute Disease , Aged , Anemia, Refractory, with Excess of Blasts/diagnosis , Anemia, Refractory, with Excess of Blasts/therapy , Chromosome Aberrations/statistics & numerical data , Female , Humans , Leukemia, Myeloid/diagnosis , Leukemia, Myeloid/therapy , Male , Middle Aged , Myelodysplastic Syndromes/diagnosis , Myelodysplastic Syndromes/therapy , Outcome Assessment, Health Care/methods , Retrospective Studies , Survival Analysis , World Health Organization
13.
Eur J Nucl Med Mol Imaging ; 49(5): 1535-1543, 2022 04.
Article in English | MEDLINE | ID: mdl-34850248

ABSTRACT

BACKGROUND: One of the challenges in the management of patients with follicular lymphoma (FL) is the identification of individuals with histological transformation, most commonly into diffuse large B-cell lymphoma (DLBCL). [18F]FDG-PET/CT is used for staging of patients with lymphoma, but visual interpretation cannot reliably discern FL from DLBCL. This study evaluated whether radiomic features extracted from clinical baseline [18F]FDG PET/CT and analyzed by machine learning algorithms may help discriminate FL from DLBCL. MATERIALS AND METHODS: Patients were selected based on confirmed histopathological diagnosis of primary FL (n=44) or DLBCL (n=76) and available [18F]FDG PET/CT with EARL reconstruction parameters within 6 months of diagnosis. Radiomic features were extracted from the volume of interest on co-registered [18F]FDG PET and CT images. Analysis of selected radiomic features was performed with machine learning classifiers based on logistic regression and tree-based ensemble classifiers (AdaBoosting, Gradient Boosting, and XG Boosting). The performance of radiomic features was compared with a SUVmax-based logistic regression model. RESULTS: From the segmented lesions, 121 FL and 227 DLBCL lesions were included for radiomic feature extraction. In total, 79 radiomic features were extracted from the SUVmap, 51 from CT, and 6 shape features. Machine learning classifier Gradient Boosting achieved the best discrimination performance using 136 radiomic features (AUC of 0.86 and accuracy of 80%). SUVmax-based logistic regression model achieved an AUC of 0.79 and an accuracy of 70%. Gradient Boosting classifier had a significantly greater AUC and accuracy compared to the SUVmax-based logistic regression (p≤0.01). CONCLUSION: Machine learning analysis of radiomic features may be of diagnostic value for discriminating FL from DLBCL tumor lesions, beyond that of the SUVmax alone.


Subject(s)
Lymphoma, Follicular , Lymphoma, Large B-Cell, Diffuse , Fluorodeoxyglucose F18 , Humans , Lymphoma, Follicular/diagnostic imaging , Lymphoma, Large B-Cell, Diffuse/diagnostic imaging , Lymphoma, Large B-Cell, Diffuse/pathology , Machine Learning , Positron Emission Tomography Computed Tomography/methods , Retrospective Studies
17.
ESMO Open ; 6(3): 100170, 2021 06.
Article in English | MEDLINE | ID: mdl-34090171

ABSTRACT

Epithelioid hemangioendothelioma (EHE) is an ultra-rare, translocated, vascular sarcoma. EHE clinical behavior is variable, ranging from that of a low-grade malignancy to that of a high-grade sarcoma and it is marked by a high propensity for systemic involvement. No active systemic agents are currently approved specifically for EHE, which is typically refractory to the antitumor drugs used in sarcomas. The degree of uncertainty in selecting the most appropriate therapy for EHE patients and the lack of guidelines on the clinical management of the disease make the adoption of new treatments inconsistent across the world, resulting in suboptimal outcomes for many EHE patients. To address the shortcoming, a global consensus meeting was organized in December 2020 under the umbrella of the European Society for Medical Oncology (ESMO) involving >80 experts from several disciplines from Europe, North America and Asia, together with a patient representative from the EHE Group, a global, disease-specific patient advocacy group, and Sarcoma Patient EuroNet (SPAEN). The meeting was aimed at defining, by consensus, evidence-based best practices for the optimal approach to primary and metastatic EHE. The consensus achieved during that meeting is the subject of the present publication.


Subject(s)
Hemangioendothelioma, Epithelioid , Sarcoma , Adult , Child , Consensus , Hemangioendothelioma, Epithelioid/diagnosis , Hemangioendothelioma, Epithelioid/drug therapy , Humans , Medical Oncology , Patient Advocacy , Sarcoma/diagnosis , Sarcoma/drug therapy
18.
Radiat Res ; 196(1): 23-30, 2021 07 01.
Article in English | MEDLINE | ID: mdl-33914890

ABSTRACT

Currently, all soft tissue sarcomas (STS) are irradiated by the same regimen, disregarding possible subtype-specific radiosensitivities. To gain further insight, cellular radiosensitivity was investigated in a panel of sarcoma cell lines. Fourteen sarcoma cell lines, derived from synovial sarcoma, leiomyosarcoma, fibrosarcoma and liposarcoma origin, were submitted to clonogenic survival assays. Cells were irradiated with single doses from 1-8 Gy and surviving fraction (SF) was calculated from the resulting response data. Alpha/beta (α/ß) ratios were inferred from radiation-response curves using the linear-quadratic (LQ)-model. Cellular radiosensitivities varied largely in this panel, indicating a considerable degree of heterogeneity. Surviving fraction after 2 Gy (SF2) ranged from 0.27 to 0.76 with evidence of a particular radiosensitive phenotype in only few cell lines. D37% on the mean data was 3.4 Gy and the median SF2 was 0.52. The median α/ß was 4.9 Gy and in six cell lines the α/ß was below 4 Gy. A fairly homogeneous radiation response was observed in myxoid liposarcoma cell lines with SF2 between 0.64 and 0.67. Further comparing sarcomas of different origin, synovial sarcomas, as a group, showed the lowest SF2 values (mean 0.35) and was significantly more radiosensitive than myxoid liposarcomas and leiomyosarcomas (P = 0.0084 and 0.024, respectively). This study demonstrates a broad spectrum of radiosensitivities across STS cell lines and reveals subtype-specific radiation responses. The particular cellular radiosensitivity of synovial sarcoma cells supports consideration of the different sarcoma entities in clinical studies that aim to optimize sarcoma radiotherapy.


Subject(s)
Radiation Tolerance , Sarcoma/radiotherapy , Cell Line, Tumor , Cell Survival/radiation effects , Humans , Sarcoma/pathology
19.
J Exp Clin Cancer Res ; 40(1): 91, 2021 Mar 09.
Article in English | MEDLINE | ID: mdl-33750427

ABSTRACT

BACKGROUND: Pancreatic ductal adenocarcinoma (PDAC) is a very lethal disease, with minimal therapeutic options. Aberrant tyrosine kinase activity influences tumor growth and is regulated by phosphorylation. We investigated phosphorylated kinases as target in PDAC. METHODS: Mass spectrometry-based phosphotyrosine proteomic analysis on PDAC cell lines was used to evaluate active kinases. Pathway analysis and inferred kinase activity analysis was performed to identify novel targets. Subsequently, we investigated targeting of focal adhesion kinase (FAK) in vitro with drug perturbations in combination with chemotherapeutics used against PDAC. Tyrosine phosphoproteomics upon treatment was performed to evaluate signaling. An orthotopic model of PDAC was used to evaluate the combination of defactinib with nab-paclitaxel. RESULTS: PDAC cell lines portrayed high activity of multiple receptor tyrosine kinases to various degree. The non-receptor kinase, FAK, was identified in all cell lines by our phosphotyrosine proteomic screen and pathway analysis. Targeting of this kinase with defactinib validated reduced phosphorylation profiles. Additionally, FAK inhibition had anti-proliferative and anti-migratory effects. Combination with (nab-)paclitaxel had a synergistic effect on cell proliferation in vitro and reduced tumor growth in vivo. CONCLUSIONS: Our study shows high phosphorylation of several oncogenic receptor tyrosine kinases in PDAC cells and validated FAK inhibition as potential synergistic target with Nab-paclitaxel against this devastating disease.


Subject(s)
Adenocarcinoma/drug therapy , Antineoplastic Agents, Phytogenic/therapeutic use , Carcinoma, Pancreatic Ductal/drug therapy , Focal Adhesion Protein-Tyrosine Kinases/metabolism , Paclitaxel/therapeutic use , Animals , Antineoplastic Agents, Phytogenic/pharmacology , Carcinoma, Pancreatic Ductal/pathology , Cell Line, Tumor , Humans , Mice , Paclitaxel/pharmacology , Phosphorylation , Signal Transduction
20.
Ann Hematol ; 100(2): 455-463, 2021 Feb.
Article in English | MEDLINE | ID: mdl-33159566

ABSTRACT

The European Leukemia Net (ELN) guidelines for treatment of myelodysplastic syndromes (MDS) connect heterogeneous MDS subgroups with a number of therapeutic options ranging from best supportive care to allogeneic stem cell transplantation (alloSCT). However, it is currently unknown whether adherence to guideline recommendations translates into improved survival. The sizeable database of the Duesseldorf MDS Registry allowed us to address this question. We first performed a retrospective analysis including 1698 patients (cohort 1) to whom we retrospectively applied the ELN guidelines. We compared patients treated according to the guidelines with patients who deviated from it, either because they received a certain treatment though it was not recommended or because they did not receive that treatment despite being eligible. We also performed a prospective study with 381 patients (cohort 2) who were seen in our department and received guideline-based expert advice. Again, we compared the impact of subsequent guideline-adherent versus non-adherent treatment. For the majority of treatment options (best supportive care, lenalidomide, hypomethylating agents, low-dose chemotherapy, and intensive chemotherapy), we found that adherence to the ELN guidelines did not improve survival in cohort 1. The same was true when patient management was prospectively enhanced through guideline-based treatment advice given by MDS experts (cohort 2). The only exceptions were alloSCT and iron chelation (ICT). Patients receiving ICT and alloSCT as recommended fared significantly better than those who were eligible but received other treatment. Our analysis underscores the limited survival impact of most MDS therapies and suggests to pursue alloSCT in all suitable candidates. Graphical abstract.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/administration & dosage , Databases, Factual , Guideline Adherence , Hematopoietic Stem Cell Transplantation , Myelodysplastic Syndromes , Antineoplastic Combined Chemotherapy Protocols/adverse effects , Disease-Free Survival , Female , Humans , Male , Myelodysplastic Syndromes/mortality , Myelodysplastic Syndromes/therapy , Prospective Studies , Retrospective Studies , Survival Rate , Transplantation, Homologous
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