Background
The optimal treatment for advanced leiomyosarcoma is still debated. Given histotype‐specific prospective controlled data lacking, this study retrospectively evaluated doxorubicin plus ...dacarbazine, doxorubicin plus ifosfamide, and doxorubicin alone as first‐line treatments for advanced/metastatic leiomyosarcoma treated at European Organization for Research and Treatment of Cancer Soft Tissue and Bone Sarcoma Group (EORTC‐STBSG) sites.
Methods
The inclusion criteria were a confirmed histological diagnosis, treatment between January 2010 and December 2015, measurable disease (Response Evaluation Criteria in Solid Tumors 1.1), an Eastern Cooperative Oncology Group performance status ≤2, and an age ≥ 18 years. The endpoints were progression‐free survival (PFS), overall survival (OS), and overall response rate (ORR). PFS was analyzed with methods for interval‐censored data. Patients were matched according to their propensity scores, which were estimated with a logistic regression model accounting for histology, grade, age, sex, performance status, tumor site, and tumor extent.
Results
Three hundred three patients from 18 EORTC‐STBSG sites were identified. One hundred seventeen (39%) received doxorubicin plus dacarbazine, 71 (23%) received doxorubicin plus ifosfamide, and 115 (38%) received doxorubicin. In the 2:1:2 propensity score–matched population (205 patients), the estimated median PFS was 9.2 months (95% confidence interval CI, 5.2‐9.7 months), 8.2 months (95% CI, 5.2‐10.1 months), and 4.8 months (95% CI, 2.3‐6.0 months) with ORRs of 30.9%, 19.5%, and 25.6% for doxorubicin plus dacarbazine, doxorubicin plus ifosfamide, and doxorubicin alone, respectively. PFS was significantly longer with doxorubicin plus dacarbazine versus doxorubicin (hazard ratio HR, 0.72; 95% CI, 0.52‐0.99). Doxorubicin plus dacarbazine was associated with longer OS (median, 36.8 months; 95% CI, 27.9‐47.2 months) in comparison with both doxorubicin plus ifosfamide (median, 21.9 months; 95% CI, 16.7‐33.4 months; HR, 0.65; 95% CI, 0.40‐1.06) and doxorubicin (median, 30.3 months; 95% CI, 21.0‐36.3 months; HR, 0.66; 95% CI, 0.43‐0.99). Adjusted analyses retained an effect for PFS but not for OS. None of the factors selected for multivariate analysis had a significant interaction with the received treatment for both PFS and OS.
Conclusions
This is the largest retrospective study of first‐line treatment for advanced leiomyosarcoma. In the propensity score–matched population, doxorubicin and dacarbazine showed favorable activity in terms of both ORR and PFS and warrants further evaluation in prospective trials.
In this propensity score‐adjusted, multi‐institutional series, doxorubicin and dacarbazine show better outcomes for the first‐line treatment of advanced leiomyosarcoma and warrant further studies. This series represents a benchmark for the future development of trials for leiomyosarcoma.
Circulating tumor cells (CTCs) and circulating tumor DNA (ctDNA) have been recently investigated in several cancer types, but their respective clinical significance remains to be determined. In our ...prospective study, we compared the detection rate and the prognostic value of these two circulating biomarkers in patients with metastatic uveal melanoma. GNAQ/GNA11 mutations were characterized in archived tumor tissue. Using a highly sensitive and mutation‐specific bidirectional pyrophosphorolysis‐activated polymerization (bi‐PAP) technique, GNAQ c.626A>T, GNAQ c.626A>C and GNA11 c.626A>T copy numbers were quantified in plasma from 12 mL of blood. CTCs were detected at the same time in 7.5 mL of blood by the CellSearch® technique. Patient characteristics and outcome were prospectively collected. CTCs (≥1) were detected in 12 of the 40 included patients (30%, range 1–20). Among the 26 patients with known detectable mutations, ctDNA was detected and quantified in 22 (84%, range 4–11,421 copies/mL). CTC count and ctDNA levels were associated with the presence of miliary hepatic metastasis (p = 0.004 and 0.03, respectively), with metastasis volume (p = 0.005 and 0.004) and with each other (p < 0.0001). CTC count and ctDNA levels were both strongly associated with progression‐free survival (p = 0.003 and 0.001) and overall survival (p = 0.0009 and <0.0001). In multivariate analyses, ctDNA appeared to be a better prognostic marker than CTC. In conclusion, ctDNA and CTC are correlated and both have poor prognostic significance. CTC detection can be performed in every patient but, in patients with detectable mutations, ctDNA was more frequently detected than CTC and has possibly more prognostic value.
What's new?
In some cancers, tumor cells and tumor DNA find their way into the bloodstream and circulate around the body. These circulating markers present the tantalizing possibility of an easily performed test for disease prognosis. In this study, the authors sought to detect circulating tumor cells and DNA from metastatic uveal melanoma. They found that the two were highly correlated with each other, but not necessarily of strong prognostic value. Circulating tumor DNA, they report, was more frequently detected, and in patients with known mutations, might prove more useful for prognosis.
Summary Background Regorafenib is a multikinase inhibitor with proven activity in refractory gastrointestinal stromal tumours and chemotherapy-refractory advanced colorectal cancers. We assessed this ...agent's efficacy and safety in patients with metastatic soft tissue sarcomas previously treated with anthracycline. Methods In this randomised, double-blind, phase 2 trial undertaken in France and Austria, we enrolled patients aged 18 years and older with advanced soft tissue sarcomas who had received previous doxorubicin or other anthracycline treatment. These patients were randomly assigned (1:1) into one of the following four cohorts: liposarcoma, leiomyosarcoma, synovial sarcoma, and other sarcomas. Participants were treated with oral regorafenib (160 mg per day 3 weeks on and 1 week off) or matched placebo. Patients receiving placebo were offered optional crossover in case of centrally confirmed disease progression. The random allocation schedule was computer-generated with permuted blocks of four patients, with two stratification factors: country (France or Austria) and previous exposure to pazopanib (yes or no). Eligibility criteria included patients with histologically proven advanced and inoperable soft tissue sarcomas with intolerance or failure to doxorubicin or other anthracycline-based chemotherapy and at least one unidimensionally or bidimensionally measurable lesion according to Response Evaluation Criteria in Solid Tumors (RECIST; version 1.1). The primary endpoint was RECIST-based progression-free survival after central radiological review in the intention-to-treat population. Patients, physicians, and radiologists of the panel were masked to treatment allocation. This study is still open for recruitment for an additional stratum (patients previously treated with pazopanib) and registered with ClinicalTrials.gov , NCT01900743. Findings From Aug 5, 2013, to Nov 26, 2014, 182 patients were randomly assigned to one of four cohorts and included in the final analysis. At the cutoff date (Jan 7, 2016), the number of required events was reached for the four cohorts. In the liposarcoma cohort, progression-free survival was 1·1 months (95% CI 0·9–2·3) with regorafenib versus 1·7 months (0·9–1·8) with placebo (HR 0·89 95% CI 0·48–1·64 p=0·70). In the leiomyosarcoma cohort, progression-free survival was 3·7 months (95% CI 2·5–5·0) with regorafenib versus 1·8 (1·0–2·8) months with placebo (HR 0·46 95% CI 0·46–0·80 p=0·0045). In the synovial sarcoma cohort, progression-free survival was 5·6 months (95% CI 1·4–11·6) with regorafenib versus 1·0 (0·8–1·4) with placebo (HR 0·10 95% CI 0·03–0·35 p<0·0001). In the other sarcoma cohort, progression-free survival was 2·9 months (95% CI 1·0–7·8) with regorafenib versus 1·0 (0·9–1·9) with placebo (HR 0·46 95% CI 0·25–0·81 p=0·0061). Before crossover, the most common clinically significant grade 3 or higher adverse events were arterial hypertension (17 19% events in the 89 patients in the regorafenib group vs two 2% events in the 92 patients in the placebo group), hand and foot skin reaction (14 15% vs no events) and asthenia (12 13% vs six 6%). One treatment-related death occurred in the regorafenib group due to liver failure. Interpretation Regorafenib has an important clinical antitumour effect in non-adipocytic soft tissue sarcomas, improving progression-free survival. Regorafenib should be further evaluated in this setting, and its therapeutic role has to be defined in the context of the growing therapeutic armamentarium, already including one approved multikinase inhibitor, pazopanib. Funding Bayer HealthCare.
Background.
This study aimed to evaluate the efficacy and toxicity of single‐agent gemcitabine versus gemcitabine plus docetaxel as second‐line therapy in patients with uterine and nonuterine ...leiomyosarcoma (LMS).
Patients and Methods.
Patients had metastatic or unresectable LMS and had received one prior anthracycline‐based regimen. A total of 90 patients received either single‐agent gemcitabine (arm A; gemcitabine, 1,000 mg/m2 i.v. for 100 minutes on days 1, 8, and 15 of a 28‐day cycle) or a combination of gemcitabine and docetaxel (arm B; gemcitabine, 900 mg/m2 i.v. for 90 minutes on days 1 and 8, plus docetaxel, 100 mg/m2 i.v. for 1 hour on day 8 of a 21‐day cycle with lenograstim). The primary endpoint was the objective response rate.
Results.
The objective response rates were 19% and 24% in arm A (gemcitabine) and arm B (gemcitabine plus docetaxel), respectively, for patients with uterine LMS. For patients with nonuterine LMS, the objective response rates were 14% and 5% for arms A and B, respectively. The median progression‐free survival times for arms A and B were 5.5 months and 4.7 months, respectively, for patients with uterine LMS. For patients with nonuterine LMS, the median progression‐free survival times were 6.3 months and 3.8 months for arms A and B, respectively. One toxic death occurred in arm B.
Conclusions.
Both single‐agent gemcitabine and gemcitabine plus docetaxel were found to be effective second‐line therapies for leiomyosarcomas, with a 3‐month progression‐free survival rate of 40% for LMS with both uterine and nonuterine sites of origin. Single‐agent gemcitabine yielded results similar to those of gemcitabine plus docetaxel in this trial, but patients using single‐agent gemcitabine experienced less toxicity.
This randomized multicenter phase II study aimed to evaluate the efficacy and toxicity of single‐agent gemcitabine versus gemcitabine plus docetaxel as second‐line therapy for patients with metastatic or relapsed leiomyosarcoma. Patients were stratified by the leiomyosarcoma's site of origin (uterine versus nonuterine).
Treatment options for metastatic osteosarcomas are scarce. Following failure of standard first line therapy, patients who relapse present a challenging treatment dilemma, and have a poor prognosis. ...Surgical removal of all metastases is essential. A retrospective analysis of patients with metastatic osteosarcomas was conducted in 15 French Sarcoma Group centers. From January 2009 to December 2018, we identified 120 adult patients; 36 with synchronous and 84 with metachronous metastases with 74 males and 46 females. Mean age was 30 years (18‐53). Metastatic sites were lung, bone and other in 91, 11 and 24 patients, respectively. Mean time to first metachronous metastases was 22 months (4‐97). All patients except 13 (10.8%) with metachronous metastases received a first line systemic treatment for relapse, and 39 patients (32.5%) were included in a clinical trial. Eighty‐one patients (67.5%) had local treatment of distant metastases. Median progression free survival (PFS) and overall survival (OS) were 5.5 (95% CI 4.6‐6.4) and 20.5 months (95% CI 13.2‐27.7) respectively for the overall group. In multivariate analysis, more than five metastases, time to first metastases <24 months, were statistically significant negative prognostic factors for OS and PFS (P = .002, ≤.001 and P = .006, ≤.001, respectively). Surgery of metastases was associated with better prognosis on OS and PFS (P = .001 and .037, respectively). The presence of bone metastases was a negative prognostic factor on OS but not on PFS (P = .021). In reference sarcoma centers, relapsed osteosarcoma patients with more than one metastasis commonly receive more than one line of systemic therapy, and are included in clinical trial if available.
What's new?
About a third of osteosarcoma patients will develop metastases, usually with a poor prognosis. In this French study of adult osteosarcoma patients, the authors compared different treatment modalities, both systemic and localized. They also sought to define prognostic factors, both for patients who developed metastases after their initial treatment, and also for those with metastatic disease at the time of diagnosis. They found no significant difference in overall survival between these two groups. They also conclude that radical focal treatment of metastases is the only modality that allows long‐lasting survival.
Background
Previous studies have shown that neutrophil‐to‐lymphocyte (NLR) ratio at diagnosis and early lymphocytes recovery on doxorubicin‐based chemotherapy, may impact the outcome in patients with ...osteosarcoma (OST). This study aimed to evaluate the prognostic value of hemogram parameters in patients with OST treated with high‐dose methotrexate and etoposide/ifosfamide (M‐EI) chemotherapy.
Materials and methods
We retrospectively analyzed the prognostic value of various hemogram parameters at diagnosis and during therapy in a large consecutive cohort of patients with OST included in the French OS2006 trial and treated with M‐EI chemotherapy.
Results
A total of 164 patients were analyzed. The median age was 14.7 years (interquartile range IQR: 11.7–17). Median follow‐up was 5.6 years (IQR: 3.3–7.7 years). Three‐year event‐free survival (EFS) and overall survival (OS) were 71.5% (95% confidence interval CI: 64%–78%) and 86.4% (95% CI: 80%–91%), respectively. In univariate analysis, blood count parameters at diagnosis and early lymphocyte recovery at Day 14 were not found prognostic of survival outcomes. By contrast, an increase of NLR ratio at Day 1 of the first EI chemotherapy (NLR‐W4) was associated with reduced OS in univariate (p = .0044) and multivariate analysis (hazards ratio HR = 1.3, 95% CI: 1.1–1.5; p = .002), although not with EFS. After adjustment on histological response and metastatic status, an increase of the ratio NLR‐W4 of 1 was associated with an increased risk of death of 30%.
Conclusions
We identified NLR‐W4 as a potential early biomarker for survival in patients with OST treated with M‐EI chemotherapy. Further studies are required to confirm the prognostic value of NLR and better identify immune mechanisms involved in disease surveillance.
Hotspot mutations in the spliceosome gene SF3B1 are reported in ∼20% of uveal melanomas. SF3B1 is involved in 3'-splice site (3'ss) recognition during RNA splicing; however, the molecular mechanisms ...of its mutation have remained unclear. Here we show, using RNA-Seq analyses of uveal melanoma, that the SF3B1(R625/K666) mutation results in deregulated splicing at a subset of junctions, mostly by the use of alternative 3'ss. Modelling the differential junctions in SF3B1(WT) and SF3B1(R625/K666) cell lines demonstrates that the deregulated splice pattern strictly depends on SF3B1 status and on the 3'ss-sequence context. SF3B1(WT) knockdown or overexpression do not reproduce the SF3B1(R625/K666) splice pattern, qualifying SF3B1(R625/K666) as change-of-function mutants. Mutagenesis of predicted branchpoints reveals that the SF3B1(R625/K666)-promoted splice pattern is a direct result of alternative branchpoint usage. Altogether, this study provides a better understanding of the mechanisms underlying splicing alterations induced by mutant SF3B1 in cancer, and reveals a role for alternative branchpoints in disease.
Summary Background Based on preclinical data for the antitumour effect of zoledronate in osteosarcoma, we assessed whether zoledronate combined with chemotherapy and surgery improved event-free ...survival in children and adults with osteosarcoma. Methods In this randomised, multicentre, open-label, phase 3 trial (OS2006), patients aged between 5 years and 50 years with newly diagnosed high-grade osteosarcoma were randomly assigned to receive standard chemotherapy with or without ten zoledronate intravenous infusions (four preoperative and six postoperative). Adults older than 25 years received 4 mg zoledronate per infusion, patients aged 18–25 years received 0·05 mg/kg for the first two infusions and 4 mg for the remaining eight infusions, and younger patients received 0·05 mg/kg per infusion. Chemotherapy comprised high-dose methotrexate based chemotherapy in patients younger than 18 years, and doxorubicin, ifosfamide, and cisplatin in adults older than 25 years; patients aged 18–25 years were treated with either regime at the discretion of the treating centre. Balanced randomisation between the two groups was done centrally with online randomisation software, based on a minimisation algorithm taking into account centre, age, combined with chemotherapy regimen, and risk group (resectable primary and no metastasis vs other). Patients and investigators were not masked to treatment assignment, but the endpoint adjudication committee members who reviewed suspected early progressions were masked to group allocation. The primary endpoint was event-free survival, estimated from the randomisation to the time of first failure (local or distant relapse, progression, death) or to the last follow-up visit for the patients in first complete remission, analysed on a modified intention-to-treat population, which excluded patients found not to have a malignant tumour after central review. Three interim analyses were planned. This trial is registered with ClinicalTrials.gov , number NCT00470223. Findings Between April 23, 2007, and March 11, 2014, 318 patients, median age 15·5 years (range 5·8–50·9), were enrolled from 40 French centres; of whom 158 were assigned to the control group (chemotherapy alone) and 160 to the zoledronate group, including 55 (17%) patients with definite metastases. The trial was stopped for futility after the second interim analysis. With a median follow-up of 3·9 years (IQR 2·7–5·1), 125 events occurred (55 in the control group and 70 in the with zoledronate group). Event-free survival at 3 years for all 315 randomly assigned patients was 60·3% (95% CI 64·5–65·9); 3-year event-free survival was 63·4% (55·2–70·9) for the control group and 57·1% (48·8–65·0) for the zoledronate group. The risk of failure was not reduced and was even marginally higher in the zoledronate group than in the control group (hazard ratio HR 1·36 95% CI 0·95–1·96; p=0·094). No major increase in severe toxic effects of grade 3 or higher associated with zoledronate, barring expected hypocalcaemia (45 29% of 153 participants in the zoledronate group vs ten 6% of 155 participants in the control group; p<0·0001) and hypophosphataemia (61 40% of 151 in the zoledronate group vs 26 17% of 156 in the control group; p<0·0001). No significant difference in orthopaedic complications was noted between the two groups (27 in the control group and 29 in the zoledronate group). Two treatment-related deaths were reported (one from cardiomyopathy in the control group and one from multiorgan failure in the zoledronate group before the first zoledronate infusion). Interpretation From the results observed in this study, we do not recommend zoledronate in osteosarcoma patients. Further biological studies are required to understand the discordance between the results of OS2006 trial and preclinical data. Funding French National Cancer Institute (INCa), Novartis, Chugai, Ligue Nationale contre le Cancer, Fédération Enfants et Santé, Société Française des Cancers et Leucémies de l'Enfant.
SummaryBackgroundDesmoid tumours are locally aggressive tumours associated with substantial morbidity. No systemic treatments are approved for this disease, with methotrexate–vinblastine the only ...chemotherapy regimen assessed in a clinical trial setting to date. VEGF overexpression is a common feature in aggressive desmoid tumours. Pazopanib is an oral antiangiogenic agent targeting VEGF receptors 1, 2, and 3, platelet-derived growth factor receptor-like protein (PDGFR) α and β, and c-KIT tyrosine kinases. We aimed to assess antitumour activity and safety of targeted therapy or combination chemotherapy in progressive desmoid tumours. MethodsDESMOPAZ was a non-comparative, randomised, open-label, phase 2 trial conducted at 12 centres from the French Sarcoma Group. We enrolled adults (≥18 years) with progressive desmoid tumours, normal organ function and centrally documented progressive disease according to Response Evaluation Criteria in Solid Tumors version 1.1 based on two imaging assessments obtained within less than a 6-month interval. Participants were randomly assigned (2:1) to oral pazopanib 800 mg per day for up to 1 year or to an intravenous regimen combining vinblastine (5 mg/m 2 per dose) and methotrexate (30 mg/m 2 per dose), administered weekly for 6 months and then every other week for 6 months. Randomisation was stratified according to inclusion centre and tumour location. The primary endpoint was the proportion of patients who had not progressed at 6 months in the first 43 patients who had received one complete or two incomplete cycles of pazopanib. This endpoint was also assessed as a prespecified exploratory endpoint in all patients who had received one complete or two incomplete cycles of methotrexate–vinblastane. Safety analyses were done for all patients who received at least one dose of allocated treatment. This trial was registered with ClinicalTrials.gov, number NCT01876082. FindingsFrom Dec 4, 2012, to Aug 18, 2017, 72 patients were enrolled and randomly assigned (n=48 in the pazopanib group; n=24 in the methotrexate–vinblastine group). Median follow-up was 23·4 months (IQR 17·1–25·5). 46 patients in the pazopanib group and 20 patients in the methotrexate–vinblastine group were assessable for activity. In the first 43 patients assessable for the primary endpoint in the pazopanib group, the proportion of patients who had not progressed at 6 months was 83·7% (95% CI 69·3–93·2). The proportion of patients treated with methotrexate–vinblastine who had not progressed at 6 months was 45·0% (95% CI 23·1–68·5). The most common grade 3 or 4 adverse events in the pazopanib group were hypertension (n=10, 21%) and diarrhoea (n=7, 15%) and in the methotrexate–vinblastine group were neutropenia (n=10, 45%) and liver transaminitis (n=4, 18%). 11 patients (23%) had at least one serious adverse event related to study treatment in the pazopanib group, as did and six patients (27%) in the methotrexate–vinblastine group. InterpretationPazopanib has clinical activity in patients with progressive desmoid tumours and could be a valid treatment option in this rare and disabling disease. FundingGlaxoSmithKline and Novartis.
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