MSCs Successfully Deliver Oncolytic Virotherapy to Diffuse Intrinsic Pontine Glioma

2020 ◽  
Author(s):  
Michael Chastkofsky ◽  
Katarzyna C. Pituch ◽  
Hiroaki Katagi ◽  
Liliana Ilut ◽  
Ting Xiao ◽  
...  
Keyword(s):  
Brain Tumors ◽  
Survival Benefit ◽  
Standard Of Care ◽  
Pediatric Brain Tumors ◽  
Diffuse Intrinsic Pontine Glioma ◽  
Surface Proteins ◽  
Oncolytic Virotherapy ◽  
Pontine Glioma ◽  
Significant Survival Benefit ◽  
Significant Survival

AbstractDiffuse intrinsic pontine glioma (DIPG) is among the deadliest of pediatric brain tumors. Radiation therapy is the standard of care treatment for DIPG, but offers only transient relief of symptoms for DIPG patients without providing significant survival benefit. Oncolytic virotherapy (OV) is an anticancer treatment that has been investigated for treating various types of brain tumors. Here, we have explored the use of mesenchymal stem cells (MSC) for OV delivery and evaluated treatment efficacy using preclinical models of DIPG. Our results show that DIPG cells and tumors exhibit robust expression of cell surface proteins that are important for OV entry, and that MSCs loaded with OV disseminate within and release OV throughout the tumor in mice bearing DIPG brainstem xenografts. When combining administration of OV-loaded MSCs with radiotherapy, mice bearing brainstem DIPG xenografts experience a significant survival benefit, relative to that conferred by either therapy alone (p<0.0001). Our results support further preclinical investigation of cell-based OV therapy with radiation for potential translation in treating DIPG patients.

scholarly journals Retrospective study of Diffuse Intrinsic Pontine Glioma in the Belgian population: a 25 year experience

2021 ◽  
Author(s):  
Dries Ruttens ◽  
Julie Messiaen ◽  
Alina Ferster ◽  
Caroline Piette ◽  
Stefan Schifflers ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Pediatric Oncology ◽  
Survival Benefit ◽  
Treatment Approach ◽  
Diffuse Intrinsic Pontine Glioma ◽  
Pontine Glioma ◽  
K27m Mutation ◽  
The Past ◽  
Significant Survival ◽  
Belgian Population

Abstract Introduction Diffuse intrinsic pontine glioma is a rare disease with a high mortality. Our primary aim was to determine the incidence of this disease in Belgium. Secondly, we wanted to compare the treatment approach of Belgian pediatric oncology centres, to investigate possibilities for improvement. Methods We retrospectively collected and analysed data on DIPG-patients diagnosed between 1994 and 2018 and recorded in the Belgian Cancer Registry. We included patients ≤ 18 years who were followed in one of the eight Belgian pediatric oncology centres. Results We included 100 patients over a period of 25 years with a median age at diagnosis of 7 years. We observed an increase in diagnoses with an incidence of 3.1 per 1,000,000 persons (aged 0-≤18) per year over the last 5 years compared to an overall incidence of 1.8. Forty-five patients (51.7%) were biopsied at diagnosis. In ten (22%), this was study-related. H3 K27M-mutation was present in 75% of biopsied patients. Fifty-one patients (59.3%) received chemotherapy, without a significant survival benefit. Eleven patients (21.2%) were included in a clinical trial. Biopsy rate and the use of chemotherapy differed widely between centres. Mean OS and PFS were 10.49 and 4.87 months respectively. We observed an improved survival over time. Conclusions Over the past 25 years, we observed an increase of new DIPG-diagnoses. Outcome in our cohort is comparable with literature findings. We demonstrate an important heterogeneity in treatment approach between different centres and limited inclusion in clinical trials. Therefore, collaboration between centres and inclusion of patients in clinical trials is much needed.

scholarly journals RARE-09. CYSTIC GLIOBLASTOMA PRESENTATION AS A BENEFICIAL PROGNOSTIC INDICATOR FOR OVERALL SURVIVAL

2019 ◽  
Vol 21 (Supplement_6) ◽  
pp. vi223-vi223
Author(s):  
Lee Curtin ◽  
Paula Whitmire ◽  
Cassandra Rickertsen ◽  
Peter D Canoll ◽  
Maciej Mrugala ◽  
...  
Keyword(s):  
Overall Survival ◽  
Survival Benefit ◽  
Standard Of Care ◽  
Prognostic Impact ◽  
Current Standard ◽  
Significant Survival Benefit ◽  
Care Treatment ◽  
Significant Survival ◽  
Cystic Component ◽  
Standard Of Care Treatment

Abstract Glioblastoma (GBM) is the most aggressive primary brain tumor with a median overall survival of 15 months with standard-of-care treatment. GBM patients sometimes present with a cystic component, which can be identified through magnetic resonance imaging (MRI). Previous studies suggest that cysts occur in 7–22% of GBM patients and have reported mixed results regarding whether cystic GBM have a survival benefit compared to noncystic GBM. Using our large retrospective cohort of 493 first-diagnosis GBM patients, we aim to elucidate this link between cystic GBM and survival. Within this cohort, 88 patients had a significant cystic component at presentation as identified on MRI. Compared to noncystic GBM (n=405), cystic GBM patients had significantly better overall survival (15 vs 22 months median, log-rank, p=0.001) and were significantly younger at the time of presentation (t-test, p=0.002). However, within patients that received current standard-of-care treatment (n=184), cystic GBM (n=40) was not as beneficial for outcome (22 vs 25 months, log-rank, p=0.3). We also did not observe a significant survival benefit when comparing this standard-of-care cystic cohort to cystic GBM patients diagnosed before the standard was established (n=19, 25 vs 23 months, log-rank, p=0.3), but the analogous result for noncystic GBM patients gives a sizeable benefit, as expected (n=144, n=111, respectively, 22 vs 12 months, log-rank p < 0.0001). Together, these results on current standard-of-care may explain later studies that note no significant survival benefit for cystic GBM patients receiving current standard-of-care. We also report differences in the absolute and relative sizes of imaging abnormalities on MRI and in prognostic impact of cysts based on sex. We discuss current hypotheses for these observed differences, including the possibility that the presence of a cyst could be indicative of a less aggressive tumor.

scholarly journals Assessment of Prognostic Value of Cystic Features in Glioblastoma Relative to Sex and Treatment with Standard-of-Care

2019 ◽  
Author(s):  
Lee Curtin ◽  
Paula Whitmire ◽  
Cassandra R. Rickertsen ◽  
Gina L. Mazza ◽  
Peter Canoll ◽  
...  
Keyword(s):  
Survival Benefit ◽  
Standard Of Care ◽  
Primary Brain Tumor ◽  
Prognostic Impact ◽  
Current Standard ◽  
Significant Survival Benefit ◽  
Significant Survival ◽  
Cystic Component ◽  
Potential Link ◽  
Magnetic Resonance Imaging Mri

AbstractGlioblastoma (GBM) is the most aggressive primary brain tumor and can have cystic components, identifiable through magnetic resonance imaging (MRI). Previous studies suggest that cysts occur in 7-23% of GBMs and report mixed results regarding their prognostic impact. Using our retrospective cohort of 493 patients with first-diagnosis GBM, we carried out an exploratory analysis on this potential link between cystic GBM and survival. Using pretreatment MRIs, we manually identified 88 patients with GBM that had a significant cystic component at presentation and 405 patients that did not. Patients with cystic GBM had significantly longer overall survival and were significantly younger at presentation. Within patients who received the current standard of care (SOC) (N=184, 40 cystic), we did not observe a survival benefit of cystic GBM. Unexpectedly, we did not observe a significant survival benefit between this SOC cystic cohort and patients with cystic GBM diagnosed before the standard was established (N=40 with SOC, N=19 without SOC); this significant SOC benefit was clearly observed in patients with noncystic GBM (N=144 with SOC, N=111 without SOC). When stratified by sex, this significant survival benefit was only preserved in male patients (N=303, 47 cystic). We report differences in the absolute and relative sizes of imaging abnormalities on MRI and the prognostic implication of cysts based on sex. We discuss hypotheses for these differences, including the possibility that the presence of a cyst could indicate a less aggressive tumor.

scholarly journals Mesenchymal Stem Cells Successfully Deliver Oncolytic Virotherapy to Diffuse Intrinsic Pontine Glioma

2020 ◽  
pp. clincanres.1499.2020
Author(s):  
Michael I Chastkofsky ◽  
Katarzyna C Pituch ◽  
Hiroaki Katagi ◽  
Markella Zannikou ◽  
Liliana Ilut ◽  
...  
Keyword(s):  
Stem Cells ◽  
Mesenchymal Stem Cells ◽  
Diffuse Intrinsic Pontine Glioma ◽  
Oncolytic Virotherapy ◽  
Pontine Glioma

scholarly journals Aptamers: Novel Therapeutics and Potential Role in Neuro-Oncology

Cancers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2889
Author(s):  
Paola Amero ◽  
Soumen Khatua ◽  
Cristian Rodriguez-Aguayo ◽  
Gabriel Lopez-Berestein
Keyword(s):  
Brain Tumors ◽  
Targeted Delivery ◽  
Cancer Therapeutics ◽  
Pediatric Brain Tumors ◽  
Surface Proteins ◽  
New Paradigm ◽  
Preclinical Research ◽  
Current State ◽  
Potential Therapeutic Role ◽  
Diagnostic Applications

A relatively new paradigm in cancer therapeutics is the use of cancer cell–specific aptamers, both as therapeutic agents and for targeted delivery of anticancer drugs. After the first therapeutic aptamer was described nearly 25 years ago, and the subsequent first aptamer drug approved, many efforts have been made to translate preclinical research into clinical oncology settings. Studies of aptamer-based technology have unveiled the vast potential of aptamers in therapeutic and diagnostic applications. Among pediatric solid cancers, brain tumors are the leading cause of death. Although a few aptamer-related translational studies have been performed in adult glioblastoma, the use of aptamers in pediatric neuro-oncology remains unexplored. This review will discuss the biology of aptamers, including mechanisms of targeting cell surface proteins, various modifications of aptamer structure to enhance therapeutic efficacy, the current state and challenges of aptamer use in neuro-oncology, and the potential therapeutic role of aptamers in pediatric brain tumors.

scholarly journals P14.56 Recurrent Glioblastomas: Should we operate a second and even a third time

2019 ◽  
Vol 21 (Supplement_3) ◽  
pp. iii80-iii80
Author(s):  
M Yahia-Cherif ◽  
O De Witte ◽  
C Mélot ◽  
F Lefranc
Keyword(s):  
Overall Survival ◽  
Survival Benefit ◽  
Standard Of Care ◽  
Recurrent Glioblastoma ◽  
Kaplan Meier ◽  
Significant Survival ◽  
Significant Difference ◽  
Second Surgery ◽  
Second Resection ◽  
Initial Resection

Abstract BACKGROUND The aim of this study was i) to analyse the effect of repeat surgeries on the survival of patients with focally recurrent glioblastoma who have benefited from temozolomide treatment and ii) to identify potential prognostic factors for survival. MATERIAL AND METHODS Cases from 2005 to 2014 in the glioblastoma database of our department were retrospectively reviewed. The Kaplan-Meier method was used to estimate overall survival (OS) as a function of time after one, two and three surgical resections. All patients received the standard of care after the first surgery (temozolomide during and after radiotherapy) and adjuvant treatment after repeat surgeries. RESULTS One hundred-thirty-two glioblastoma patients (median age: 57 years) were included in the study. Among them, 68, 53 and 11 patients underwent one, two and three surgical resections, respectively. The median OS was 11, 16 and 18 months, respectively, for patients who underwent one, two and three surgical resections. Patients who underwent two (p<0.001) or three (p<0.01) surgeries survived significantly longer than patients who underwent only one. No significant difference was observed between patients who underwent two versus three surgeries (p=0.76). A second resection performed more than 6 months after the initial resection was the only factor associated with prolonged survival (p=0.008). CONCLUSION Glioblastoma patients who benefited from temozolomide treatment and underwent surgery for recurrent glioblastoma exhibited a significant increase in survival compared with patients who did not undergo a second surgery. By contrast, a third surgery for a second recurrence did not contribute to any significant survival benefit.

A randomized phase III trial of active symptom control (ASC) with or without chemotherapy in the treatment of patients with malignant pleural mesothelioma: First results of the Medical Research Council (MRC) / British Thoracic Society (BTS) MS01 trial

2007 ◽  
Vol 25 (18_suppl) ◽  
pp. LBA7525-LBA7525 ◽  
Author(s):  
M. Muers ◽  
P. Fisher ◽  
M. Snee ◽  
E. Lowry ◽  
M. O'Brien ◽  
...  
Keyword(s):  
Randomized Trial ◽  
Median Survival ◽  
Malignant Pleural Mesothelioma ◽  
Survival Benefit ◽  
Phase Iii ◽  
Pleural Mesothelioma ◽  
Significant Survival Benefit ◽  
Significant Survival ◽  
Symptom Palliation ◽  
Weekly Cycles

LBA7525 Background: Although chemotherapy is widely used in the treatment of mesothelioma it has never been compared in a randomized trial with ASC alone. Two chemotherapy regimens that had shown good symptom palliation in phase II studies were chosen for investigation. Methods: Patients with malignant pleural mesothelioma were randomized to ASC alone (regular follow-up in a specialist clinic, and treatment could include steroids, analgesics, bronchodilators, palliative radiotherapy, etc), ASC+MVP (4 × 3-weekly cycles of mitomycin 6g/m2, vinblastine 6mg/m2, and cisplatin 50mg/m2), or ASC+N (12 weekly injections of vinorelbine 30mg/m2). 420 patients were required to detect a 3-month improvement in median survival with ASC+CT (both chemotherapy arms combined). Quality of Life (QL) was assessed using the EORTC QLQ-C30. Results: 409 patients were accrued (136 ASC, 137 ASC+MVP, 136 ASC+N). Median age: 65 years, male: 91%, Performance status 0: 23%, Epithelial histology: 73%, Stage III: 33%, Stage IV: 48%. In the ASC+MVP group 61% received all 4 cycles, and in the ASC+N group 49% received at least 10 weekly cycles. Good symptom palliation (defined as prevention, control or improvement) was achieved in all 3 groups, and no between-group differences were observed in 4 pre-defined QL subscales (physical functioning, dyspnoea, pain and global QL). A small (not conventionally significant) survival benefit was seen for ASC+CT (349 deaths, HR 0.89, 95%CI 0.72, 1.12, p=0.32). Median survival: ASC: 7.6 months, ASC+CT: 8.5 months. Exploratory analyses suggested a survival advantage for vinorelbine compared to ASC alone (HR 0.81, 95%CI 0.63, 1.05, p=0.11), with a median survival of 9.4 months, but no evidence of a benefit with MVP (HR 0.98, 95%CI 0.76, 1.28), p=0.91). Conclusions: This is the 2nd largest ever randomized trial in mesothelioma and the first to compare ASC with or without chemotherapy. Although the addition of chemotherapy to ASC did not result in a conventionally significant survival benefit, there was an indication that vinorelbine should be investigated further, and that MVP probably has no role in this disease. [Table: see text]

scholarly journals Progress in diffuse intrinsic pontine glioma: advocating for stereotactic biopsy in the standard of care

2020 ◽  
Vol 48 (1) ◽  
pp. E4 ◽  
Author(s):  
John R. Williams ◽  
Christopher C. Young ◽  
Nicholas A. Vitanza ◽  
Margaret McGrath ◽  
Abdullah H. Feroze ◽  
...  
Keyword(s):  
Stereotactic Biopsy ◽  
Standard Of Care ◽  
Diffuse Intrinsic Pontine Glioma ◽  
Pontine Glioma ◽  
Brainstem Tumor ◽  
T Cell Therapy ◽  
The Us ◽  
Brainstem Tumors ◽  
Prospective Trials ◽  
Brainstem Biopsy

Diffuse intrinsic pontine glioma (DIPG) is a universally fatal pediatric brainstem tumor affecting approximately 300 children in the US annually. Median survival is less than 1 year, and radiation therapy has been the mainstay of treatment for decades. Recent advances in the biological understanding of the disease have identified the H3K27M mutation in nearly 80% of DIPGs, leading to the 2016 WHO classification of diffuse midline glioma H3K27M-mutant, a grade IV brainstem tumor. Developments in epigenetic targeting of transcriptional tendencies have yielded potential molecular targets for clinical trials. Chimeric antigen receptor T cell therapy has also shown preclinical promise. Recent clinical studies, including prospective trials, have demonstrated the safety and feasibility of pediatric brainstem biopsy in the setting of DIPG and other brainstem tumors. Given developments in the ability to analyze DIPG tumor tissue to deepen biological understanding of this disease and develop new therapies for treatment, together with the increased safety of stereotactic brainstem biopsy, the authors present a case for offering biopsy to all children with suspected DIPG. They also present their standard operative techniques for image-guided, frameless stereotactic biopsy.

Sign in / Sign up

Export Citation Format

Share Document