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A national randomised multi-centre trial to assess the effect of oral magnesium supplementation on the kinetics of magnesium wasting induced by EGFR targeted antibody therapy for colorectal carcinoma (the MAGNET trial).

ABSTRACT: Primary objectives: • To evaluate the efficacy and tolerability of magnesium gluconate 3 g bid. given orally to modulate magnesium wasting in patients with colorectal cancer treated with EGFR targeted antibody therapy.• To evaluate the efficacy and tolerability of magnesium gluconate 3 g six times per day compared to 3 g bid. given orally to modulate magnesium wasting in patients with colorectal cancer with grade 2 hypomagnesemia induced by EGFR targeted antibody therapy Primary endpoints: After informed consent has been given, subjects meeting the inclusion criteria will be randomised to two different therapeutic approaches: • Arm A: No intervention (part 1), until appearance hypomagnesemia grade 1, followed by magnesium gluconate 3 g bid. orally (part 2)• Arm B: Prophylactic treatment with magnesium gluconate 3 g bid orally (part 1) until appearance of hypomagnesemia grade 1, followed by magnesium gluconate 3 g 6X/day orally (part 2)The primary efficacy variables of the part 1 of the study will be:• The slope of the change in serum magnesium levels since baseline• The mean number of bowel movements per day.The secondary efficacy variables of this part of the study will be:• The mean number of missed doses• The mean grade of fatigue according to CTC version 3.0• The QoL score at two-weekly intervals recorded with the QLQ-C30 questionnaire from EORTC. • Patients will end part 1 of the study, as soon as the subjects have one serum magnesium level with grade 1 hypomagnesemia. They will then be entered in part 2. The primary efficacy variables of part 2 of the study will be:• The slope of the change in serum magnesium levels since appearance of grade 1 hypomagnesaemia• The mean number of bowel movements per day.The secondary efficacy variables of this part of the study will be:• The mean number of missed doses • The mean grade of fatigue according to CTC version 3.0• The QOL score at two-weekly intervals recorded with the QLQ-C30 questionnaire from EORTC. •

DISEASE(S): Blood Magnesium Decreased,To Evaluate The Effect And Tolerability Of High Dose Mg Gluconate Oral Substitution In The (1) Prevention And (2) Treatment Of Magnesium Wasting Due To Anti-egfr Treatment In Colorectal Cancer

PROVIDER: 2521807 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:Ribba2012 - Low-grade gliomas, tumour growth inhibition model Using longitudinal mean tumour diameter (MTD) data, this model describe the size evolution of low-grade glioma (LGG) in patients treated with chemotherapy or radiotherapy. This model is described in the article: A tumour growth inhibition model for low-grade glioma treated with chemotherapy or radiotherapy Ribba B, Kaloshi G, Peyre M, Ricard D, Calvez V, Tod M, Cajavec-Bernard B, Idbaih A, Psimaras D, Dainese L, Pallud J, Cartalat-Carel S, Delattre JY, Honnorat J, Grenier E, Ducray F. Clin. Cancer Res. 2012 Sep; 18(18): 5071-5080 Abstract: PURPOSE: To develop a tumor growth inhibition model for adult diffuse low-grade gliomas (LGG) able to describe tumor size evolution in patients treated with chemotherapy or radiotherapy. EXPERIMENTAL DESIGN: Using longitudinal mean tumor diameter (MTD) data from 21 patients treated with first-line procarbazine, 1-(2-chloroethyl)-3-cyclohexyl-l-nitrosourea, and vincristine (PCV) chemotherapy, we formulated a model consisting of a system of differential equations, incorporating tumor-specific and treatment-related parameters that reflect the response of proliferative and quiescent tumor tissue to treatment. The model was then applied to the analysis of longitudinal tumor size data in 24 patients treated with first-line temozolomide (TMZ) chemotherapy and in 25 patients treated with first-line radiotherapy. RESULTS: The model successfully described the MTD dynamics of LGG before, during, and after PCV chemotherapy. Using the same model structure, we were also able to successfully describe the MTD dynamics in LGG patients treated with TMZ chemotherapy or radiotherapy. Tumor-specific parameters were found to be consistent across the three treatment modalities. The model is robust to sensitivity analysis, and preliminary results suggest that it can predict treatment response on the basis of pretreatment tumor size data. CONCLUSIONS: Using MTD data, we propose a tumor growth inhibition model able to describe LGG tumor size evolution in patients treated with chemotherapy or radiotherapy. In the future, this model might be used to predict treatment efficacy in LGG patients and could constitute a rational tool to conceive more effective chemotherapy schedules. This model is hosted on BioModels Database and identified by: BIOMD0000000521 . To cite BioModels Database, please use: BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models . To the extent possible under law, all copyright and related or neighbouring rights to this encoded model have been dedicated to the public domain worldwide. Please refer to CC0 Public Domain Dedication for more information.

Project description:This is a model built by COPASI4.24(Build 197) This a model from the article: Computational design of improved standardized chemotherapy protocols for grade II oligodendrogliomas Víctor M. Pérez-García, Luis E. Ayala-Hernández, Juan Belmonte-Beitia, Philippe Schucht, Michael Murek, Andreas Raabe, Juan Sepúlveda. PLoS Comput Biol. 2019 Jul; 15(7): e1006778. Abstract: Here we put forward a mathematical model describing the response of low-grade (WHO grade II) oligodendrogliomas (LGO) to temozolomide (TMZ). The model describes the longitudinal volumetric dynamics of tumor response to TMZ of a cohort of 11 LGO patients treated with TMZ. After finding patient-specific parameters, different therapeutic strategies were tried computationally on the ‘in-silico twins’ of those patients. Chemotherapy schedules with larger-than-standard rest periods between consecutive cycles had either the same or better long-term efficacy than the standard 28-day cycles. The results were confirmed in a large trial of 2000 virtual patients. These long-cycle schemes would also have reduced toxicity and defer the appearance of resistances. On the basis of those results, a combination scheme consisting of five induction TMZ cycles given monthly plus 12 maintenance cycles given every three months was found to provide substantial survival benefits for the in-silico twins of the 11 LGO patients (median 5.69 years, range: 0.67 to 68.45 years) and in a large virtual trial including 2000 patients. We used 220 sets of experiments in-silico to show that a clinical trial incorporating 100 patients per arm (standard intensive treatment versus 5 + 12 scheme) could demonstrate the superiority of the novel scheme after a follow-up period of 10 years. Thus, the proposed treatment plan could be the basis for a standardized TMZ treatment for LGO patients with survival benefits. This model originates from BioModels Database: A Database of Annotated Published Models (http://www.ebi.ac.uk/biomodels/). It is copyright (c) 2005-2011 The BioModels.net Team. For more information see the terms of use. To cite BioModels Database, please use: Li C, Donizelli M, Rodriguez N, Dharuri H, Endler L, Chelliah V, Li L, He E, Henry A, Stefan MI, Snoep JL, Hucka M, Le Novère N, Laibe C (2010) BioModels Database: An enhanced, curated and annotated resource for published quantitative kinetic models. BMC Syst Biol., 4:92

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A national randomised multi-centre trial to assess the effect of oral magnesium supplementation on the kinetics of magnesium wasting induced by EGFR targeted antibody therapy for colorectal carcinoma (the MAGNET trial).

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