scholarly journals A review of the biological and clinical implications of RAS-MAPK pathway alterations in neuroblastoma

Author(s):  
Vid Mlakar ◽  
Edouard Morel ◽  
Simona Jurkovic Mlakar ◽  
Marc Ansari ◽  
Fabienne Gumy-Pause

AbstractNeuroblastoma is the most common extra-cranial solid tumor in children, representing approximately 8% of all malignant childhood tumors and 15% of pediatric cancer-related deaths. Recent sequencing and transcriptomics studies have demonstrated the RAS-MAPK pathway’s contribution to the development and progression of neuroblastoma. This review compiles up-to-date evidence of this pathway’s involvement in neuroblastoma. We discuss the RAS-MAPK pathway’s general functioning, the clinical implications of its deregulation in neuroblastoma, and current promising therapeutics targeting proteins involved in signaling.

Cancers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 4945
Author(s):  
Cristiane de Sá de Sá Ferreira-Facio ◽  
Vitor Botafogo ◽  
Patrícia Mello Ferrão ◽  
Maria Clara Canellas ◽  
Cristiane B. Milito ◽  
...  

Early diagnosis of pediatric cancer is key for adequate patient management and improved outcome. Although multiparameter flow cytometry (MFC) has proven of great utility in the diagnosis and classification of hematologic malignancies, its application to non-hematopoietic pediatric tumors remains limited. Here we designed and prospectively validated a new single eight-color antibody combination—solid tumor orientation tube, STOT—for diagnostic screening of pediatric cancer by MFC. A total of 476 samples (139 tumor mass, 138 bone marrow, 86 lymph node, 58 peripheral blood, and 55 other body fluid samples) from 296 patients with diagnostic suspicion of pediatric cancer were analyzed by MFC vs. conventional diagnostic procedures. STOT was designed after several design–test–evaluate–redesign cycles based on a large panel of monoclonal antibody combinations tested on 301 samples. In its final version, STOT consists of a single 8-color/12-marker antibody combination (CD99-CD8/numyogenin/CD4-EpCAM/CD56/GD2/smCD3-CD19/cyCD3-CD271/CD45). Prospective validation of STOT in 149 samples showed concordant results with the patient WHO/ICCC-3 diagnosis in 138/149 cases (92.6%). These included: 63/63 (100%) reactive/disease-free samples, 43/44 (98%) malignant and 4/4 (100%) benign non-hematopoietic tumors together with 28/38 (74%) leukemia/lymphoma cases; the only exception was Hodgkin lymphoma that required additional markers to be stained. In addition, STOT allowed accurate discrimination among the four most common subtypes of malignant CD45− CD56++ non-hematopoietic solid tumors: 13/13 (GD2++ numyogenin− CD271−/+ nuMyoD1− CD99− EpCAM−) neuroblastoma samples, 5/5 (GD2− numyogenin++ CD271++ nuMyoD1++ CD99−/+ EpCAM−) rhabdomyosarcomas, 2/2 (GD2−/+ numyogenin− CD271+ nuMyoD1− CD99+ EpCAM−) Ewing sarcoma family of tumors, and 7/7 (GD2− numyogenin− CD271+ nuMyoD1− CD99− EpCAM+) Wilms tumors. In summary, here we designed and validated a new standardized antibody combination and MFC assay for diagnostic screening of pediatric solid tumors that might contribute to fast and accurate diagnostic orientation and classification of pediatric cancer in routine clinical practice.


2017 ◽  
Vol 35 (15_suppl) ◽  
pp. 10509-10509 ◽  
Author(s):  
Barbara Christine Worst ◽  
Elke Pfaff ◽  
Cornelis M. Van Tilburg ◽  
Gnana Prakash Balasubramanian ◽  
Petra Fiesel ◽  
...  

10509 Background: Relapses from high-risk tumors pose a major clinical challenge in pediatric oncology. The German INFORM registry (INdividualized therapy FOr Relapsed Malignancies in children) addresses this problem using integrated next-generation sequencing to rapidly identify patient-specific therapeutic targets. Methods: Whole-exome, low-coverage whole-genome and RNA sequencing is complemented with microarray-based DNA methylation profiling. Identified alterations are discussed and prioritized according to biological significance and potential druggability in a weekly molecular tumor board. Results: To date, 214 tumor samples of high-risk pediatric cancer patients have been profiled from 47 German centers, with 39% being sarcomas, 30% brain tumors, 13% neuroblastoma and 18% hematological or other malignancies. Turnaround time from tissue arrival to molecular results was 21 calendar days on average. In 14/214 patients (7%) we identified an underlying germline predisposition syndrome. In several cases there were discrepancies between the original histological diagnosis and our molecular findings, especially in brain tumors. We detected one or more potentially druggable alterations in 147/214 (69%) cases. Tyrosine kinases, the PI3K/mTOR pathway, MAPK pathway, and cell-cycle as well as transcriptional regulators were commonly affected. Based on these findings, targeted therapeutics were incorporated into the therapy regime in one-third of patients, with anecdotal reports of marked responses, including a patient with a pleomorphic sarcoma, where we detected a previously undescribed RAF-fusion, showing a partial remission upon RAF-inhibition. Conclusions: In summary, real-time comprehensive profiling of pediatric tumors provides valuable diagnostic information and identifies potential therapeutic targets. In parallel, the implementation of a systematic program for reverse-translational evaluation is ongoing. Recently, this nationwide effort has expanded to include patients from other countries. We will also recruit patients to the complementary eSMART and INFORM2 biomarker-driven, phase I/II combination trial series, to provide unprecedented access to targeted therapies in Europe.


2019 ◽  
Vol 37 (15_suppl) ◽  
pp. 10020-10020 ◽  
Author(s):  
Jonathan M Marron ◽  
Emily Quach ◽  
Yana Pikman ◽  
Katherine A. Janeway ◽  
Jennifer W. Mack ◽  
...  

10020 Background: Tumor genomic sequencing is rapidly becoming more integrated into pediatric oncology, but for only a minority of individuals does sequencing identify new treatment options or impart an increased chance of cure. Retrospective data show that participants have high hopes for this promising technology, but patient/parent hopes and expectations for the outcomes of genomic sequencing have not previously been evaluated prospectively. Methods: Surveys were administered prospectively to eligible enrollees (young adult patients ≥18y with relapsed/recurrent cancer, rare cancers, and those with poor prognoses, or parents of patients < 18y) prior to return of sequencing results in two clinical sequencing studies through the GAIN (NCT02520713) and LEAP (NCT02670525) Consortia, across 18 pediatric cancer centers. Using previously validated measures, participants were queried about what they most hoped for and thought most likely to happen (most expected) as a result of participating in the sequencing study. Comparisons were made between hopes and expectations using McNemar’s test. Separate multivariate models assessed predictors of most hoping for, and most expecting, increased chance of cure as a result of participating. Models were adjusted for gender, race, disease (leukemia/solid tumor), highest education level achieved, and survey participant (patient/parent). We present interim survey results for 124 participants (67% response rate) who completed surveys between 10/15/17 (GAIN) or 9/1/16 (LEAP) and 1/15/19. Results: 58% (70/121) of respondents selected increased chance of cure as their greatest hope in participating; only 21% (25/119) reported cure as their greatest expectation (p < 0.005). 28% (34/121) most hoped their participation would help cure future patients, and 45% (54/119) most expected this result (p < 0.005). Only 8% (10/121) most hoped to learn more about their/their child’s cancer, but 21% (25/119) most expected this result (p = 0.006). In multivariate analyses, education beyond college level was associated with most hoping for cure as a result of sequencing (OR 2.7 95% CI [1.2, 5.8], p = 0.016). A solid tumor diagnosis was associated with most expecting cure in this setting (OR 2.7 [1.0, 7.2], p = 0.048). Conclusions: Participants derive great hope from participating in pediatric cancer genomic sequencing research, but expectations are more tempered. Some subgroups express heightened expectations of cure, however, potentially identifying target populations for educational intervention.


2021 ◽  
pp. clincanres.4221.2020
Author(s):  
Nathan M. Kendsersky ◽  
Jarrett M Lindsay ◽  
Edward A. Kolb ◽  
Malcolm A. Smith ◽  
Beverly A. Teicher ◽  
...  

Children ◽  
2018 ◽  
Vol 5 (10) ◽  
pp. 142 ◽  
Author(s):  
Emily Greengard

Neuroblastoma is the most common extra-cranial solid tumor encountered in childhood and accounts for 15% of pediatric cancer-related deaths. Although there has been significant improvement in the outcomes for patients with high-risk disease, the therapy needed to achieve a cure is quite toxic and for those that do experience a disease recurrence, the prognosis is very dismal. Given this, there is a tremendous need for novel therapies for children with high-risk neuroblastoma and the molecular discoveries over recent years provide hope for developing new, less toxic, and potentially more efficacious treatments. Here I discuss many of the molecular aberrations identified thus far in neuroblastoma, as well as the agents in development to target these changes. The progress made in both the preclinical arena and in early phase drug development provide much promise for the future of precision medicine in neuroblastoma.


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