Abstract 2914
Background
Acute lymphoblastic leukaemia (ALL) is associated with high survival rates in paediatrics and young adults and less favourable outcomes in older adults. Clinical trials (CTs) studying survival-based endpoints in ALL lead to significantly prolonged trial durations, resulting in delays to medicines access. Biomarkers in ALL have been correlated with longer-term outcomes, potentially accelerating the clinical development of novel treatments. The aim of this study was to characterise efficacy measures investigated in ALL CTs conducted in the European Union (EU)/Economic Area (EEA).
Methods
Interventional Phase II to Phase IV ALL CTs registered in the EU Clinical Trials Register over an 11-year period (2007-2017) were identified. Therapeutic CTs reporting efficacy data in the English language for investigational medicinal products of chemical, biological and biotechnological origin were included in the study. A protocol design or age filter was not applied to avoid limiting the scope of outcomes identified. Primary and secondary efficacy endpoints were extracted from the selected CTs and categorised according to type of measurement. A data mining process was performed to detect trends in outcomes studied.
Results
The data set comprised 68 CTs representing about 20,000 patients. The majority of trials (69%, n = 47) recruited patients from the adult population (18-64 years) and conducted only Phase II studies (62%, n = 42). Twenty-three unique efficacy endpoints were identified and stratified into the clusters of survival (n = 4), time-to-event (n = 3), response rates and biomarkers (n = 11) and other (n = 5). Fifty-three per cent (n = 36) of the trials reported 4-10 outcomes, with a mean of 4 outcomes per CT (range 1-10). The principal endpoints evaluated in CTs consisted of overall survival (CTs: 63%, n = 43), minimal residual disease (CTs: 50%, n = 34), event-free survival (CTs: 40%, n = 27) and disease-free survival (CTs: 40%, n = 27).
Conclusions
The high uptake of minimal residual disease as an efficacy parameter in ALL CTs is in line with reported findings confirming the prognostic value of this marker on clinical outcomes. Heterogeneity in the selection of efficacy endpoints was observed which warrants future work on the standardisation of efficacy outcomes in ALL CTs.
Clinical trial identification
Editorial acknowledgement
The Malta Medicines Authority. The Department of Pharmacy, Faculty of Medicine and Surgery, University of Malta.
Legal entity responsible for the study
Department of Pharmacy, Faculty of Medicine and Surgery, University of Malta.
Funding
Government of Malta, Endeavour Scholarship Scheme 2017.
Disclosure
All authors have declared no conflicts of interest.
Resources from the same session
3309 - Heat Shock Protein 90 chaperones and Protein Kinase D3 regulates androgen-independent prostate cancer development
Presenter: Attila Varga
Session: Poster Display session 1
Resources:
Abstract
3441 - The SWI/SNF driven reprograming for the AR cistrome is NSD2 dependent
Presenter: Katia Ruggero
Session: Poster Display session 1
Resources:
Abstract
1659 - IGF1R inhibition affects the survival of HT29 cancer cells by alterations of the TLR9- and autophagy signaling
Presenter: Györgyi Műzes
Session: Poster Display session 1
Resources:
Abstract
1379 - Characterization of atypical dMMR (deficient MisMatch Repair) tumors: a study from a large cohort of 4948 cases
Presenter: Marion Jaffrelot
Session: Poster Display session 1
Resources:
Abstract
1657 - Modulation of TLR9-dependent autophagy response via inhibition of c-Met signaling influences the survival of HT29 cancer cells
Presenter: Ferenc Sipos
Session: Poster Display session 1
Resources:
Abstract
3045 - Positive Feedback Activation of Notch Signal by Obesity Enhances Colorectal Tumorigenicity
Presenter: Dake Chu
Session: Poster Display session 1
Resources:
Abstract
2285 - The Pathological and Functional Roles of BRPF1 in Hepatocellular Carcinoma
Presenter: Lai Hung Carol Cheng
Session: Poster Display session 1
Resources:
Abstract
3210 - Protein tyrosine phosphatase non-receptor type 3 (PTPN3) could be a new therapeutic target for pancreatic cancer.
Presenter: Akio Yamasaki
Session: Poster Display session 1
Resources:
Abstract
3920 - A Novel bispecific BCMAxCD3 T cell engaging antibody that treat multiple myeloma (MM) with minimal cytokine serection
Presenter: Zhenyu Li
Session: Poster Display session 1
Resources:
Abstract
2691 - Quantitative spatial profiling of lymphocyte-activation gene 3 (LAG-3)/major histocompatibility complex class II (MHC II) interaction in gastric and urothelial tumors
Presenter: Cyrus Hedvat
Session: Poster Display session 1
Resources:
Abstract