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1.
BMC Cancer ; 24(1): 449, 2024 Apr 11.
Article in English | MEDLINE | ID: mdl-38605332

ABSTRACT

BACKGROUND: While surgical resection remains the primary treatment approach for symptomatic or growing meningiomas, radiotherapy represents an auspicious alternative in patients with meningiomas not safely amenable to surgery. Biopsies are often omitted in light of potential postoperative neurological deficits, resulting in a lack of histological grading and (molecular) risk stratification. In this prospective explorative biomarker study, extracellular vesicles in the bloodstream will be investigated in patients with macroscopic meningiomas to identify a biomarker for molecular risk stratification and disease monitoring. METHODS: In total, 60 patients with meningiomas and an indication of radiotherapy (RT) and macroscopic tumor on the planning MRI will be enrolled. Blood samples will be obtained before the start, during, and after radiotherapy, as well as during clinical follow-up every 6 months. Extracellular vesicles will be isolated from the blood samples, quantified and correlated with the clinical treatment response or progression. Further, nanopore sequencing-based DNA methylation profiles of plasma EV-DNA will be generated for methylation-based meningioma classification. DISCUSSION: This study will explore the dynamic of plasma EVs in meningioma patients under/after radiotherapy, with the objective of identifying potential biomarkers of (early) tumor progression. DNA methylation profiling of plasma EVs in meningioma patients may enable molecular risk stratification, facilitating a molecularly-guided target volume delineation and adjusted dose prescription during RT treatment planning.


Subject(s)
Extracellular Vesicles , Meningeal Neoplasms , Meningioma , Humans , Meningioma/surgery , Meningeal Neoplasms/surgery , Prospective Studies , Liquid Biopsy , Biomarkers , Extracellular Vesicles/pathology
2.
Int J Radiat Oncol Biol Phys ; 118(4): 1011-1017, 2024 Mar 15.
Article in English | MEDLINE | ID: mdl-37863242

ABSTRACT

PURPOSE: After radical prostatectomy (RP), adjuvant or salvage radiation treatment in node-positive prostate cancer is offered to prevent systemic disease. Prospective long-term survival and toxicity data on patients with radiation for nodal disease are still scarce. This study evaluates safety and feasibility of salvage radiation therapy to the pelvic lymph nodes in node-positive prostate cancer after RP. METHODS AND MATERIALS: Between 2009 and 2018, 78 patients with lymph node recurrence after RP (PLATIN-4 trial) or after RP and prostate bed radiation therapy (PLATIN-5 trial) were treated with salvage pelvic lymph node radiation therapy with boost to the involved nodes as field abutment (PLATIN-5) and boost to the prostate bed (PLATIN-4). Androgen deprivation therapy was started 2 months before radiation and recommended for 24 months. The primary endpoint was safety and feasibility of the intensity modulated radiation therapy-image guided radiation therapy technique based on the rate of treatment discontinuations and incidence of Common Terminology Criteria for Adverse Events grade 3+ toxicity. Secondary endpoints were progression-free survival and overall survival. RESULTS: No treatment discontinuations were reported in either trial. Median overall survival was not reached in PLATIN-4 and was 117 months in PLATIN-5. Median progression-free survival was 66 months in PLATIN-4 and 39 months in PLATIN-5. Late grade 3+ genitourinary and gastrointestinal toxicities were observed in 4% of patients at 24 months of follow-up. CONCLUSIONS: Salvage radiation therapy to the prostate bed and pelvic lymphatic drainage combined with long-term androgen deprivation therapy is a curative treatment option for patients with node-positive prostate cancer after RP, with excellent in-field disease control. Pelvic lymph node radiation therapy as field abutment after prostate bed radiation therapy is feasible with long-term survival and no high-grade toxicity.


Subject(s)
Prostatic Neoplasms , Male , Humans , Prostatic Neoplasms/drug therapy , Prostatic Neoplasms/radiotherapy , Prostatic Neoplasms/pathology , Androgen Antagonists/therapeutic use , Prospective Studies , Androgens , Prostatectomy , Prostate-Specific Antigen
3.
J Clin Med ; 12(8)2023 Apr 09.
Article in English | MEDLINE | ID: mdl-37109126

ABSTRACT

OBJECTIVES: To evaluate oral sequelae after head and neck radiotherapy (RT) when using two different types of intraoral appliances. Thermoplastic dental splints (active control) protect against backscattered radiation from dental structures. Semi-individualized, 3D-printed tissue retraction devices (TRDs, study group) additionally spare healthy tissue from irradiation. MATERIALS AND METHODS: A total of 29 patients with head and neck cancer were enrolled in a randomized controlled pilot trial and allocated to receive TRDs (n = 15) or conventional splints (n = 14). Saliva quality and quantity (Saliva-Check, GC), taste perception (Taste strips, Burghart-Messtechnik), and oral disability (JFLS-8, OHIP-14, maximum mouth opening) were recorded before and 3 months after RT start. Radiotherapy target volume, modality, total dose, fractionation, and imaging guidance were case-dependent. To evaluate intra-group developments between baseline and follow-up, nonparametric Wilcoxon tests were performed. Mann-Whitney-U tests were applied for inter-group comparisons. RESULTS: At follow-up, taste perception was unimpaired (median difference in the total score; TRDs: 0, control: 0). No significant changes were found regarding oral disability. Saliva quantity (stimulated flow) was significantly reduced with conventional splints (median -4 mL, p = 0.016), while it decreased insignificantly with TRDs (median -2 mL, p = 0.07). Follow-up was attended by 9/15 study group participants (control 13/14). Inter-group comparisons showed no significant differences but a tendency towards a better outcome for disability and saliva quality in the intervention group. CONCLUSION: Due to the small cohort size and the heterogeneity of the sample, the results must be interpreted with reservation. Further research must confirm the positive trends of TRD application. Negative side-effects of TRD application seem improbable.

4.
Front Biosci (Schol Ed) ; 14(1): 2, 2022 01 20.
Article in English | MEDLINE | ID: mdl-35320913

ABSTRACT

While the primary purpose of radiotherapy (RT) is the elimination of cancer cells by inducing DNA-damage, considerable evidence emerges that anti-neoplastic effects extend beyond mere tumor cell killing. These secondary effects are based on activation of dendritic cells (DCs) via induction of antitumoral immune reactions. However, there is an ongoing debate whether or not irradiation of the DCs themselves may negatively affect their maturation and functionality. Human monocytes were irradiated with different absorbed doses (1 × 15 Gy relative biological effectiveness (RBE), 5 × 2 Gy (RBE), 1 × 0.5 Gy (RBE)) with photons, protons and carbon ions. Differentiation and maturation of DCs were assessed by staining of corresponding cell surface molecules and functional analysis of irradiated DCs was based on in vitro analysis of phagocytosis, migration and IL-12 secretion. Irradiation of CD14-positive DCs did not alter surface phenotypes of immature DCs and mature DCs. Not only differentiation, but also functionality of immature DCs regarding phagocytosis, migration and IL-12 secretion capacity was not negatively influenced through RT with photons, protons or carbon ions as well as with different dose levels. After proton irradiation migratory capacity of immature DCs was increased. Our experiments reveal that phenotypic maturation of DCs remains unchanged after RT with different fractionations and after irradiation with particle therapy. Unaffected functionality (phagocytosis, migration and cytokine secretion) after RT of DCs indicated possible persistent potential for inducing adaptive immune response. Additional effects on the immunogenic potential of DCs will be investigated by further functional assays.


Subject(s)
Dendritic Cells , Protons , Carbon/pharmacology , Cell Differentiation , Interleukin-12/metabolism , Interleukin-12/pharmacology , Monocytes/metabolism , Photons
5.
Radiother Oncol ; 163: 165-176, 2021 10.
Article in English | MEDLINE | ID: mdl-34480960

ABSTRACT

BACKGROUND: We recently published 2-year results of the prospective, randomized IMRT-MC2 trial, showing non-inferior local control and cosmesis in breast cancer patients after conventionally fractionated intensity-modulated radiotherapy with simultaneously integrated boost (IMRT-SIB), compared to 3D-conformal radiotherapy with sequential boost (3D-CRT-seqB). Here, we report on 2-year quality of life results. PATIENTS AND METHODS: 502 patients were enrolled and randomized to IMRT-SIB (50.4 Gy in 1.8 Gy fractions with a 64.4 Gy SIB to the tumor bed) or to 3D-CRT-seqB (50.4 Gy in 1.8 Gy fractions, followed by a sequential boost of 16 Gy in 2 Gy fractions). For quality of life (QoL) assessment, patients completed the QLQ-C30 and QLQ-BR23 questionnaires at baseline, 6 weeks and 2 years after radiotherapy. RESULTS: Significant differences between treatment arms were seen 6 weeks after radiotherapy for pain (22.3 points for IMRT vs. 27.0 points for 3D-CRT-seqB; p = 0.033) and arm symptoms (18.1 points for IMRT vs. 23.6 points for 3D-CRT-seqB; p = 0.013), both favoring IMRT-SIB. Compared to baseline values, both arms showed significant improvement in global score (IMRT: p = 0.009; 3D-CRT: p = 0.001) after 2 years, with slight deterioration on the role (IMRT: p = 0.008; 3-D-CRT: p = 0.001) and social functioning (IMRT: p = 0.013, 3D-CRT: p = 0.001) as well as the future perspectives scale (IMRT: p = 0.003; 3D-CRT: p = 0.0034). CONCLUSION: This is the first randomized phase III trial demonstrating that IMRT-SIB was associated with slightly superior QoL compared to 3-D-CRT-seqB. These findings further support the clinical implementation of SIB in adjuvant breast cancer treatment.


Subject(s)
Breast Neoplasms , Radiotherapy, Conformal , Radiotherapy, Intensity-Modulated , Breast Neoplasms/radiotherapy , Female , Humans , Prospective Studies , Quality of Life , Radiotherapy Dosage , Radiotherapy Planning, Computer-Assisted
6.
Radiat Oncol ; 16(1): 75, 2021 Apr 17.
Article in English | MEDLINE | ID: mdl-33865401

ABSTRACT

BACKGROUND: Despite modern treatment techniques, radiotherapy (RT) in patients with head and neck cancer (HNC) may be associated with high rates of acute and late treatment-related toxicity. The most effective approach to reduce sequelae after RT is to avoid as best as possible healthy tissues and organs at risk from the radiation target volume. Even small geometric changes can lead to a significant dose reduction in normal tissue and better treatment tolerability. The major objective of the current study is to investigate 3D printed, tooth-borne tissue retraction devices (TRDs) compared to conventional dental splints for head and neck RT. METHODS: In the current two-arm randomized controlled phase II trial, a maximum of 34 patients with HNC will be enrolled. Patients will receive either TRDs or conventional dental splints (randomization ratio 1:1) for the RT. The definition of the target volume, modality, total dose, fractionation, and imaging guidance is not study-specific. The primary endpoint of the study is the rate of acute radiation-induced oral mucositis after RT. The quality of life, local control and overall survival 12 months after RT are the secondary endpoints. Also, patient-reported outcomes and dental status, as well as RT plan comparisons and robustness analyzes, will be assessed as exploratory endpoints. Finally, mesenchymal stem cells, derived from the patients' gingiva, will be tested in vitro for regenerative and radioprotective properties. DISCUSSION: The preliminary clinical application of TRD showed a high potential for reducing acute and late toxicity of RT in patients with HNC. The current randomized study is the first to prospectively investigate the clinical tolerability and efficacy of TRDs for radiation treatment of head and neck tumors. TRIAL REGISTRATION: ClinicalTrials.gov; NCT04454697; July 1st 2020; https://clinicaltrials.gov/ct2/show/record/NCT04454697 .


Subject(s)
Carcinoma, Squamous Cell/radiotherapy , Head and Neck Neoplasms/radiotherapy , Printing, Three-Dimensional , Radiotherapy/instrumentation , Salivary Gland Neoplasms/radiotherapy , Tooth/anatomy & histology , Adolescent , Adult , Aged , Contrast Media , Dose Fractionation, Radiation , Female , Gingiva/radiation effects , Humans , Kaplan-Meier Estimate , Male , Mesenchymal Stem Cells/radiation effects , Middle Aged , Mucositis/etiology , Quality of Life , Radiation Injuries , Radiation Oncology , Risk , Treatment Outcome , Xerostomia/etiology , Young Adult
7.
Int J Radiat Oncol Biol Phys ; 109(5): 1311-1324, 2021 04 01.
Article in English | MEDLINE | ID: mdl-33321192

ABSTRACT

PURPOSE: In the modern era, improvements in radiation therapy techniques have paved the way for simultaneous integrated boost irradiation in adjuvant breast radiation therapy after breast conservation surgery. Nevertheless, randomized trials supporting the noninferiority of this treatment to historical standards of care approach are lacking. METHODS: A prospective, multicenter, randomized phase 3 trial (NCT01322854) was performed to analyze noninferiority of conventional fractionated intensity modulated radiation therapy with simultaneous integrated boost (IMRT-SIB) to 3-D conformal radiation therapy with sequential boost (3-D-CRT-seqB) for breast cancer patients. Primary outcomes were local control (LC) rates at 2 and 5 years (noninferiority margin at hazard ratio [HR] of 3.5) as well as cosmetic results 6 weeks and 2 years after radiation therapy (evaluated via photo documentation calculating the relative breast retraction assessment [pBRA] score [noninferiority margin of 1.25]). RESULTS: A total of 502 patients were randomly assigned from 2011 to 2015. After a median follow-up of 5.1 years, the 2-year LC for the IMRT-SIB arm was noninferior to the 3-D-CRT-seqB arm (99.6% vs 99.6%, respectively; HR, 0.602; 95% CI, 0.123-2.452; P = .487). In addition, noninferiority was also shown for cosmesis after IMRT-SIB and 3-D-CRT-seqB at both 6 weeks (median pBRA, 9.1% vs 9.1%) and 2 years (median pBRA, 10.4% vs 9.8%) after radiation therapy (95% CI, -0.317 to 0.107 %; P = .332). Cosmetic assessment according to the Harvard scale by both the patient and the treating physician as well as late-toxicity evaluation with the late effects normal tissues- subjective, objective, management, analytic criteria, a score for the evaluation of long-term adverse effects in normal tissue, revealed no significant differences between treatment arms. In addition, there was no difference in overall survival rates (99.6% vs 99.6%; HR, 3.281; 95% CI: -0.748 to 22.585; P = .148) for IMRT-SIB and 3-D-CRT-seqB, respectively. CONCLUSIONS: To our knowledge, this is the first prospective trial reporting the noninferiority of IMRT-SIB versus 3-D-CRT-seqB with respect to cosmesis and LC at 2 years of follow-up. This treatment regimen considerably shortens adjuvant radiation therapy times without compromising clinical outcomes.


Subject(s)
Breast Neoplasms/radiotherapy , Radiotherapy, Intensity-Modulated/methods , Adult , Aged , Aged, 80 and over , Breast/radiation effects , Breast Neoplasms/mortality , Breast Neoplasms/surgery , Female , Follow-Up Studies , Heart/radiation effects , Humans , Lung/radiation effects , Mastectomy, Segmental , Middle Aged , Organs at Risk/radiation effects , Prospective Studies , Radiotherapy, Adjuvant , Radiotherapy, Conformal/methods , Survival Rate , Time Factors , Treatment Outcome
8.
BMC Cancer ; 20(1): 947, 2020 Oct 01.
Article in English | MEDLINE | ID: mdl-33004046

ABSTRACT

BACKGROUND: Radiotherapy is known to improve local tumor control in locally advanced pancreatic cancer (LAPC), although there is a lack of convincing data on a potential overall survival benefit of chemoradiotherapy over chemotherapy alone. To improve efficacy of radiotherapy, new approaches need to be evolved. Carbon ion radiotherapy is supposed to be more effective than photon radiotherapy due to a higher relative biological effectiveness (RBE) and due to a steep dose-gradient making dose delivery highly conformal. METHODS: The present Phase II PACK-study investigates carbon ion radiotherapy as definitive treatment in LAPC as well as in locally recurrent pancreatic cancer. A total irradiation dose of 48 Gy (RBE) will be delivered in twelve fractions. Concurrent chemotherapy is accepted, if indicated. The primary endpoint is the overall survival rate after 12 months. Secondary endpoints are progression free survival, safety, quality of life and impact on tumor markers CA 19-9 and CEA. A total of twenty-five patients are planned for recruitment over 2 years. DISCUSSION: Recently, Japanese researches could show promising results in a Phase I/II-study evaluating chemoradiotherapy of carbon ion radiotherapy and gemcitabine in LAPC. The present prospective PACK-study investigates the efficacy of carbon ion radiotherapy in pancreatic cancer at Heidelberg Ion Beam Therapy Center (HIT) in Germany. TRIAL REGISTRATION: The trial is registered at ClinicalTrials.gov: NCT04194268 (Retrospectively registered on December, 11th 2019).


Subject(s)
CA-19-9 Antigen/blood , Carcinoembryonic Antigen/blood , Heavy Ion Radiotherapy/adverse effects , Neoplasm Recurrence, Local/radiotherapy , Pancreatic Neoplasms/radiotherapy , Adult , Aged , Carbon/therapeutic use , Disease-Free Survival , Female , Humans , Male , Middle Aged , Neoplasm Recurrence, Local/blood , Neoplasm Recurrence, Local/pathology , Pancreatic Neoplasms/blood , Pancreatic Neoplasms/pathology , Prospective Studies , Treatment Outcome
9.
Radiat Oncol ; 15(1): 190, 2020 Aug 05.
Article in English | MEDLINE | ID: mdl-32758267

ABSTRACT

BACKGROUND: Intensity-modulated re-radiotherapy (reIMRT) has been established as a standard local treatment option in patients with non-resectable, recurrent head and neck cancer (rHNC). However, the clinical outcome is unfavorable and severe toxicities (≥grade III) occurred in 30-40% of patients. The primary aim of the current trial is to investigate carbon ion reirradiation (reCIRT) compared to reIMRT in patients with rHNC regarding safety/toxicity as well as local control, overall survival (OS), and quality of life (QoL). METHODS: The present trial will be performed as a single center, two-armed, prospective phase II study. A maximum of 72 patients will be treated with either reIMRT or reCIRT to evaluate severe (≥grade III) treatment-related toxicities (randomization ratio 1:1). The primary target value is to generate less than 35% acute/subacute severe toxicity (≥grade III), according to the Common Terminology Criteria for Adverse Events v5.0, within 6 months after study treatment. The total dose of reirradiation will range between 51 and 60 Gy or Gy (RBE), depending primarily on the radiotherapy interval and the cumulative dose to organs at risk. Individual dose prescription will be at the discretion of the treating radiation oncologist. The local and distant progression-free survival 12 months after reirradiation, the OS, and the QoL are the secondary endpoints of the trial. Explorative trial objectives are the longitudinal investigation of clinical patient-related parameters, tumor parameters on radiological imaging, and blood-based tumor analytics. DISCUSSION: Recent retrospective studies suggested that reCIRT could represent a feasible and effective treatment modality for rHNC. This current randomized prospective trial is the first to investigate the toxicity and clinical outcome of reCIRT compared to reIMRT in patients with rHNC. TRIAL REGISTRATION: ClinicalTrials.gov ; NCT04185974 ; December 4th 2019.


Subject(s)
Head and Neck Neoplasms/radiotherapy , Heavy Ion Radiotherapy/methods , Neoplasm Recurrence, Local/radiotherapy , Radiotherapy Planning, Computer-Assisted/methods , Radiotherapy, Intensity-Modulated/methods , Squamous Cell Carcinoma of Head and Neck/radiotherapy , Adolescent , Adult , Aged , Aged, 80 and over , Clinical Trials, Phase II as Topic , Female , Humans , Male , Middle Aged , Organs at Risk/radiation effects , Prognosis , Prospective Studies , Radiotherapy Dosage , Randomized Controlled Trials as Topic , Young Adult
10.
Trials ; 21(1): 352, 2020 Apr 22.
Article in English | MEDLINE | ID: mdl-32321565

ABSTRACT

BACKGROUND: Elderly patients represent a major fraction of non-small cell lung cancer (NSCLC) patients in routine clinical practice, but they are still underrepresented in clinical trials. In particular, data regarding efficacy and safety in frail or elderly patients with respect to immunotherapy are lacking. Importantly, immunosenescence in elderly patients might interfere with activities of immune-modulating drugs such as PD-1/PD-L1 inhibitors. Thus, there is an urgent need to assess safety and efficacy of such inhibitors in this group. METHODS/DESIGN: This prospective, open label, treatment stratified, randomized phase II study will enroll 200 patients with stage IV NSCLC amenable at least to single-agent chemotherapy (CT). Eligible patients must be aged 70 years or older and/or "frail" (Charlson Comorbidity Index > 1) or have a restricted performance status (Eastern Cooperative Oncology Group, ECOG > 1). Patients are stratified according to modified Cancer and Age Research Group (CARG) score: "fit" patients are allocated to combination CT (carboplatin/nab-paclitaxel) and "less fit" patients receive single-agent CT (gemcitabine or vinorelbine). After allocation to strata, patients are randomized 1:1 to receive either four cycles of CT or two cycles of CT followed by two cycles of durvalumab and subsequent maintenance treatment with durvalumab every 4 weeks. The primary endpoint is the rate of treatment-related grade III/IV adverse events (Common Terminology Criteria for Adverse Events (CTCAE) V4.03). As secondary endpoints, progression-free survival (PFS) according to Response Evaluation Criteria in Solid Tumours (RECIST) version 1.1, response rate (RR), overall survival (OS), descriptive subgroup analyses according to PD-L1 expression, and quality of life are addressed. Geriatric screening assessments and functional tests will be performed to complete the phenotyping of a potential "frail" and "elderly" patient cohort. The trial is accompanied by a biomaterial repository to explore potential biomarkers. DISCUSSION: The DURATION trial will prospectively investigate the safety and tolerability of anti-PD-L1 treatment with durvalumab after chemotherapy in elderly and frail patients and thereby provide new insights into the effect of PD-L1 blockade and the impact of immunosenescence in this cohort of patients. TRIAL REGISTRATION: ClinicalTrials.gov, NCT03345810; initially registered on 17 November 2017. Eudra-CT, 2016-003963-20; initially registered on 3 January 2017.


Subject(s)
Antibodies, Monoclonal/adverse effects , Antineoplastic Agents, Immunological/adverse effects , Antineoplastic Combined Chemotherapy Protocols , Carcinoma, Non-Small-Cell Lung/drug therapy , Immunotherapy/methods , Lung Neoplasms/drug therapy , Aged , Aged, 80 and over , Albumins/adverse effects , Carboplatin/adverse effects , Carcinoma, Non-Small-Cell Lung/epidemiology , Carcinoma, Non-Small-Cell Lung/pathology , Clinical Trials, Phase II as Topic , Deoxycytidine/adverse effects , Deoxycytidine/analogs & derivatives , Female , Frail Elderly , Germany/epidemiology , Humans , Lung Neoplasms/epidemiology , Lung Neoplasms/pathology , Male , Multicenter Studies as Topic , Neoplasm Staging , Paclitaxel/adverse effects , Progression-Free Survival , Prospective Studies , Randomized Controlled Trials as Topic , Vinorelbine/adverse effects , Gemcitabine
11.
BMC Cancer ; 20(1): 52, 2020 Jan 21.
Article in English | MEDLINE | ID: mdl-31964381

ABSTRACT

BACKGROUND: The incidence of anal cancer is rising in the last decades and more women are affected than men. The prognosis after chemoradiation is very good with complete remission rates of 80-90%. Thus, reducing therapy-related toxicities and improving quality of life are of high importance. With the development of new radiotherapy techniques like IMRT (Intensity-modulated radiotherapy), the incidence of acute and chronic gastrointestinal toxicities has already been reduced. However, especially in female anal cancer patients genital toxicities like vaginal fibrosis and stenosis are of great relevance, too. Up to now, there are no prospective data reporting incidence rates, techniques of prevention or impact on quality of life. The aim of the DILANA trial is to evaluate the incidence and grade of vaginal fibrosis, to optimize radiotherapy by reducing dose to the vaginal wall to minimize genital toxicities and improve quality of life of anal cancer patients. METHODS: The study is designed as a prospective, randomized, two-armed, open, single-center phase-II-trial. Sixty patients will be randomized into one of two arms, which differ only in the diameter of a tampon used during treatment. All patients will receive standard (chemo) radiation with a total dose of 45-50.4 Gy to the pelvic and inguinal nodes with a boost to the anal canal up to 54-60 Gy. The primary objective is the assessment of the incidence and grade of vaginal fibrosis 12 months after (chemo) radiation depending on the extent of vaginal dilation. Secondary endpoints are toxicities according to the CTC AE version 5.0 criteria, assessment of clinical feasibility of daily use of a tampon, assessment of compliance for the use of a vaginal dilator and quality of life. DISCUSSION: Prospective studies are needed evaluating the incidence and grade of vaginal fibrosis after (chemo) radiation in female anal cancer patients. Furthermore, the assessment of techniques to reduce the incidence of vaginal fibrosis like intrafractional vaginal dilation as well as other radiotherapy-independent methods like using a vaginal dilator are essential. Additionally, implementation of a systematic assessment of vaginal stenosis is necessary to grant reproducibility and comparability of future data. TRIAL REGISTRATION: The trial is registered with clinicaltrials.gov (NCT04094454, 19.09.2019).


Subject(s)
Anus Neoplasms/therapy , Chemoradiotherapy/adverse effects , Pelvic Neoplasms/therapy , Radiation Injuries/pathology , Radiotherapy, Intensity-Modulated/adverse effects , Vaginal Diseases/pathology , Adolescent , Adult , Aged , Aged, 80 and over , Anus Neoplasms/pathology , Female , Humans , Middle Aged , Pelvic Neoplasms/pathology , Prognosis , Prospective Studies , Quality of Life , Radiation Injuries/etiology , Radiotherapy Dosage , Vaginal Diseases/etiology , Young Adult
12.
BMC Cancer ; 19(1): 1074, 2019 Nov 08.
Article in English | MEDLINE | ID: mdl-31703637

ABSTRACT

BACKGROUND: Hypofractionated palliative radiotherapy for metastatic lung cancer patients is frequently used in order to ease pain, to increase bone stability, to treat local mass effects, or to prolong progression-free survival at critical sites. Recently introduced, immunotherapy for patients with non-squamous non-small cell lung carcinoma (NSCLC) has significantly improved outcome in this cohort. Preclinical and early clinical data suggest that the combination of photon radiation with programmed death-1 (PD-1) targeting immunotherapies may promote a strong and durable immune response against tumor manifestations both within and beyond radiation targets. METHODS/DESIGN: In the present prospective, two-group, non-randomized, open-label phase II trial, 130 patients with stage IV non-squamous NSCLC in 2nd-line or 3rd-line treatment will be included. 65 patients with a clinical indication for palliative radiotherapy to non-cerebral/non-pulmonary metastatic sites will receive 240 mg nivolumab followed by palliative radiotherapy with 5 × 4 Gray (Gy) = 20 Gy photon radiation, which will be initiated within 72 h after first nivolumab administration (Group A). 65 patients without an indication for radiotherapy will only receive nivolumab (Group B). Nivolumab will be further administered every two weeks in both groups and will be continued until progression and loss of clinical benefit or until occurrence of limiting toxicities. The primary endpoint will be the objective response rate (ORR) according to response evaluation criteria in solid tumors (RECIST) 1.1. Secondary endpoints will be progression-free survival (PFS) according to RECIST 1.1, overall survival, descriptive subgroup analyses according to PD-L1 expression, toxicity and quality of life. Since response patterns following immunotherapies differ from those after conventional cytostatic agents, both objective response rate and progression-free survival will additionally be assessed according to immune-related RECIST (irRECIST) criteria. DISCUSSION: The FORCE study will prospectively investigate response rates, progression-free and overall survival (OS), and toxicity of nivolumab with and without hypofractionated palliative radiotherapy in a group of 130 patients with metastatic non-small cell lung cancer (non-squamous histology) in 2nd-line or 3rd-line treatment. This trial will contribute prospective data to the repeatedly published observation that the combination of hypofractionated photon radiotherapy and medical immunotherapy is not only safe but will also promote antitumoral immune responses. TRIAL REGISTRATION: Clinicaltrials.gov identifier: NCT03044626 (Date of initial registration: 05 January 2017). Eudra-CT Number: 2015-005741-31 (Date of initial registration: 18 December 2015).


Subject(s)
Antineoplastic Agents, Immunological/therapeutic use , Carcinoma, Non-Small-Cell Lung/radiotherapy , Carcinoma, Non-Small-Cell Lung/therapy , Immunotherapy , Lung Neoplasms/radiotherapy , Lung Neoplasms/therapy , Nivolumab/therapeutic use , Programmed Cell Death 1 Receptor/antagonists & inhibitors , Antineoplastic Agents, Immunological/administration & dosage , Antineoplastic Agents, Immunological/adverse effects , Antineoplastic Agents, Immunological/pharmacology , B7-H1 Antigen/analysis , Biomarkers, Tumor/analysis , Cohort Studies , Combined Modality Therapy/methods , Follow-Up Studies , Humans , Nivolumab/administration & dosage , Nivolumab/adverse effects , Nivolumab/pharmacology , Progression-Free Survival , Prospective Studies , Quality of Life , Radiation Dose Hypofractionation , Response Evaluation Criteria in Solid Tumors
13.
BMC Cancer ; 19(1): 914, 2019 Sep 13.
Article in English | MEDLINE | ID: mdl-31519152

ABSTRACT

BACKGROUND: NY-BR-1 has been described as a breast cancer associated differentiation antigen with intrinsic immunogenicity giving rise to endogenous T and B cell responses. The current study presents the first murine tumor model allowing functional investigation of NY-BR-1-specific immune responses in vivo. METHODS: A NY-BR-1 expressing tumor model was established in DR4tg mice based on heterotopic transplantation of stable transfectant clones derived from the murine H2 compatible breast cancer cell line EO771. Composition and phenotype of tumor infiltrating immune cells were analyzed by qPCR and FACS. MHC I binding affinity of candidate CTL epitopes predicted in silico was determined by FACS using the mutant cell line RMA-S. Frequencies of NY-BR-1 specific CTLs among splenocytes of immunized mice were quantified by FACS with an epitope loaded Db-dextramer. Functional CTL activity was determined by IFNγ catch or IFNγ ELISpot assays and statistical analysis was done applying the Mann Whitney test. Tumor protection experiments were performed by immunization of DR4tg mice with replication deficient recombinant adenovirus followed by s.c. challenge with NY-BR-1 expressing breast cancer cells. RESULTS: Our results show spontaneous accumulation of CD8+ T cells and F4/80+ myeloid cells preferentially in NY-BR-1 expressing tumors. Upon NY-BR-1-specific immunization experiments combined with in silico prediction and in vitro binding assays, the first NY-BR-1-specific H2-Db-restricted T cell epitope could be identified. Consequently, flow cytometric analysis with fluorochrome conjugated multimers showed enhanced frequencies of CD8+ T cells specific for the newly identified epitope in spleens of immunized mice. Moreover, immunization with Ad.NY-BR-1 resulted in partial protection against outgrowth of NY-BR-1 expressing tumors and promoted intratumoral accumulation of macrophages. CONCLUSION: This study introduces the first H2-Db-resctricted CD8+ T cell epitope-specific for the human breast cancer associated tumor antigen NY-BR-1. Our novel, partially humanized tumor model enables investigation of the interplay between HLA-DR4-restricted T cell responses and CTLs within their joint attack of NY-BR-1 expressing tumors.


Subject(s)
Antigens, Neoplasm/immunology , Epitopes, T-Lymphocyte/immunology , HLA-DRB1 Chains/genetics , Neoplasms/etiology , Neoplasms/pathology , T-Lymphocytes/immunology , T-Lymphocytes/metabolism , Animals , Antigens, Neoplasm/genetics , Biomarkers , Cell Line, Tumor , Disease Models, Animal , HLA-DRB1 Chains/immunology , Heterografts , Humans , Immunization , Immunophenotyping , Leukocytes/immunology , Leukocytes/metabolism , Mice , Mice, Transgenic , T-Lymphocyte Subsets/immunology , T-Lymphocyte Subsets/metabolism
14.
Neurosurgery ; 84(1): 253-260, 2019 01 01.
Article in English | MEDLINE | ID: mdl-29554321

ABSTRACT

BACKGROUND: Stereotactic radiosurgery (SRS) of brain metastases (BM) is recommended in oligometastatic scenarios as a less toxic treatment alternative to whole-brain radiotherapy. Recent findings support SRS for patients with multiple (>3) BM. Furthermore, advances in MR imaging have facilitated the detection of very small BM, as advances in SRS technology have facilitated the highly conformal and simultaneous treatment of multiple target lesions. OBJECTIVE: To compare efficacy and toxicity of repeated frameless robotic SRS of up to 10 simultaneous BM through a single-center prospective randomized trial. METHODS: Two hundred patients will be randomized and receive imaging and treatment based on either the highly sensitive SPACE (sampling perfection with application optimized contrasts using different flip angle evolution) or the MPRAGE (magnetization-prepared rapid gradient-echo) magnetic resonance imaging sequence. If during follow-up new metastases are detected, treatment is repeated. The primary endpoint is reached when a patient develops more than 10 simultaneous new BM and is thus deemed unsuitable for further SRS. Overall survival will be assessed as secondary endpoint. Quality of life and neurocognition will be evaluated every 3 mo using CANTAB tests and EORTC (European Organisation for Research and Treatment of Cancer) questionnaires. EXPECTED OUTCOMES: We expect to show that repeated SRS based on sensitive imaging can delay intracranial dissemination while preserving neurocognitive function and quality of life. DISCUSSION: The present study is the first to prospectively assess the benefit of sensitive imaging and repeated stereotactic irradiation in the treatment of patients with multiple BM. It represents a novel approach, where in a palliative setting advanced technology in treatment and diagnostics is employed to improve tumor control while also reducing toxicity and preserving quality of life.


Subject(s)
Brain Neoplasms/diagnostic imaging , Brain Neoplasms/radiotherapy , Brain Neoplasms/secondary , Radiosurgery/methods , Robotic Surgical Procedures/methods , Adult , Female , Humans , Magnetic Resonance Imaging/methods , Male , Middle Aged , Neoplasm Metastasis/diagnostic imaging , Neoplasm Metastasis/radiotherapy , Neuroimaging/methods , Prospective Studies , Research Design
15.
Trials ; 19(1): 388, 2018 Jul 16.
Article in English | MEDLINE | ID: mdl-30012190

ABSTRACT

BACKGROUND: Conventional whole brain radiotherapy (WBRT) has been established as the treatment standard in patients with cerebral metastases from small-cell lung cancer (SCLC), however, it has only modest efficacy and limited prospective data is available for WBRT as well as local treatments such as stereotactic radiosurgery (SRS). METHODS/DESIGN: The present single-center prospective randomized study, conducted at Heidelberg University Hospital, compares neurocognitive function, as objectively measured by significant deterioration in Hopkins Verbal Learning Test - Revised total recall at 3 months. Fifty-six patients will be randomized to receive either SRS of all brain metastases (up to ten lesions) or WBRT. Secondary endpoints include intracranial progression (local tumor progression and number of new cerebral metastases), extracranial progression, overall survival, death due to brain metastases, local (neurological) progression-free survival, progression-free survival, changes in other cognitive performance measures, quality of life and toxicity. DISCUSSION: Recent evidence suggests that SRS might be a promising treatment option for SCLC patients with brain metastases. The present trial is the first to prospectively investigate the treatment response, toxicity and neurocognition of WBRT and SRS in SCLC patients. TRIAL REGISTRATION: Clinicaltrials.gov NCT03297788 . Registered September 29, 2017.


Subject(s)
Brain Neoplasms/radiotherapy , Brain Neoplasms/secondary , Cranial Irradiation , Lung Neoplasms/pathology , Radiosurgery , Randomized Controlled Trials as Topic , Small Cell Lung Carcinoma/pathology , Clinical Trials, Phase II as Topic , Data Interpretation, Statistical , Humans , Prospective Studies , Small Cell Lung Carcinoma/secondary
16.
Neurosurgery ; 83(3): 566-573, 2018 09 01.
Article in English | MEDLINE | ID: mdl-29528419

ABSTRACT

BACKGROUND: Neurosurgical resection is recommended for symptomatic brain metastases, in oligometastatic patients or for histology acquisition. Without adjuvant radiotherapy, roughly two-thirds of the patients relapse at the resection site within 24 mo, while the risk of new metastases in the untreated brain is around 50%. Adjuvant whole-brain radiotherapy (WBRT) can reduce the risk of both scenarios of recurrence significantly, although the associated neurocognitive toxicity is substantial, while stereotactic radiotherapy (SRT) improves local control at comparably low toxicity. OBJECTIVE: To compare locoregional control and treatment-associated toxicity for postoperative SRT and WBRT after the resection of 1 brain metastasis in a single-center prospective randomized study. METHODS: Fifty patients will be randomized to receive either hypofractionated SRT of the resection cavity and single- or multisession SRT of all unresected brain metastases (up to 10 lesions) or WBRT. Patients will be followed-up regularly and the primary endpoint of neurological progression-free survival will be assessed by magnetic resonance imaging (MRI). Quality of life and neurocognition will be assessed in 3-mo intervals using standardized tests and EORTC questionnaires. EXPECTED OUTCOMES: We expect to show that postoperative SRT of the resection cavity and further unresected brain metastases is a valid means of improving locoregional control over observation at less neurocognitive toxicity than caused by WBRT. DISCUSSION: The present study is the first to compare locoregional control as well as neurocognitive toxicity for postoperative SRT and WBRT in patients with up to 10 metastases, while utilizing a highly sensitive and standardized MRI protocol for treatment planning and follow-up.


Subject(s)
Brain Neoplasms/therapy , Cranial Irradiation/methods , Neoplasm Recurrence, Local/therapy , Postoperative Care/methods , Radiosurgery/methods , Adult , Brain/diagnostic imaging , Brain/radiation effects , Brain/surgery , Brain Neoplasms/diagnostic imaging , Cranial Irradiation/trends , Female , Humans , Magnetic Resonance Imaging/methods , Magnetic Resonance Imaging/trends , Male , Middle Aged , Neoplasm Recurrence, Local/diagnostic imaging , Postoperative Care/trends , Progression-Free Survival , Prospective Studies , Quality of Life , Radiosurgery/trends , Radiotherapy Dosage , Radiotherapy, Adjuvant/methods , Radiotherapy, Adjuvant/trends
17.
Strahlenther Onkol ; 194(5): 454-461, 2018 05.
Article in English | MEDLINE | ID: mdl-29450588

ABSTRACT

PURPOSE: Retrospective study of effectiveness, toxicity, and relapse patterns after low-dose radiotherapy (LDRT) in patients with low-grade lymphomas. METHODS: 47 patients (median age 64 years) with 50 lesions were treated with LDRT (2â€¯× 2 Gy). In 60%, LDRT was the primary and curative treatment, in 40% offered as second-line therapy in recurrent disease. Histology included follicular (57%) and marginal zone lymphomas (43%). Patients were followed-up regularly clinically (skin) and with CT or MRI scans. RESULTS: Median follow-up was 21 months. 84% of the lesions were extranodal disease (32% orbit, 14% salivary glands, 30% skin, and 8% others). Most lesions were ≤5 cm (90%) with a singular affection (74%). 26% of the patients received rituximab simultaneously. Overall response rate (ORR) was 90% (all lesions), 93.3% (primary treatment), and 85% (recurrence treatment); p = 0.341. 2­year Local progression-free survival (LPFS) for all, curative, and palliative patients was 91.1%, 96.7%, and 83.8%, respectively; p = 0.522. Five relapses were detected: three infield only, and were therefore treated with LDRT or subsequent local RT of 30 Gy. Two patients showed an in- and outfield progression and were consequently treated with chemotherapy. Predictive factors for higher LPFS were tumor size ≤5 cm (p = 0.003), ≤2 previous treatments (p = 0.027), no skin involvement (p = 0.05), singular affection (p = 0.075), and simultaneous rituximab application (p = 0.148). LDRT was tolerated well, without detectable acute or long-term side effects. CONCLUSION: Primary LDRT is an effective treatment with high ORR and long-lasting remissions in a subset of patients with low-grade lymphoma, and may therefore be a curative treatment option for patients with low tumor burden. LDRT with the CD20 antibody obinutuzumab will soon be tested in a prospective multicenter trial.


Subject(s)
Lymphoma, B-Cell, Marginal Zone/radiotherapy , Lymphoma, Follicular/radiotherapy , Neoplasm Recurrence, Local/etiology , Radiotherapy Dosage , Adult , Aged , Aged, 80 and over , Female , Follow-Up Studies , Humans , Male , Middle Aged , Neoplasm Grading , Neoplasm Recurrence, Local/radiotherapy , Outcome and Process Assessment, Health Care , Radiotherapy, Adjuvant , Retrospective Studies
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