Dataset Information

Evaluation of the Efficacy of Xaliproden (SR57746A) in Preventing the Neurotoxicity of Oxaliplatin / 5FU/LV Chemotherapy.

ABSTRACT: Primary Objective : Compare the risk of occurrence of Grade3-4 cumulative peripheral sensory neuropathy (PSN) relative to cumulative dose of oxaliplatin between treatment group and placebo group. Main Secondary Objective : Compare the response rate (RR) between treatment group and placebo group in order to ensure that the efficacy of the chemotherapy is not compromised by the addition of xaliproden to the chemotherapeutic regimen. Other Secondary Objectives : study of the neurotoxicity parameters (Duration of oxaliplatin-induced PSN (G2,3,4); overall incidence of PSN during treatment; dose of onset of PSN ; incidence of dose-reduction and dose delay due to PSN; incidence of oxaliplatin treatment discontinuation due to PSN; change in Nerve Conduction Studies (NCS)) ; study of the safety profile (other than PSN) ; study of the chemotherapy efficacy (progression free survival, overall survival).

DISEASE(S): Colorectal Carcinoma,Patients With Metastatic Colorectal Cancer Treated With Oxaliplatin/5-fu/lv; At Risk Of Cumulative Peripheral Sensory Neuropathy (psn) Relative To Cumulative Dose Of Oxaliplatin.,Neurotoxicity Syndromes,Colorectal Neoplasms,Metastases

PROVIDER: 2027364 | ecrin-mdr-crc |

REPOSITORIES: ECRIN MDR

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Project description:Lockwood2006 - AlzheimersDisease PBPK model A mathematical model to predict the effectiveness of CI-1017 (muscarinic agonist) for Alzheimer's disease by evaluating changes in ADAS-cog score. This model is described in the article: Application of clinical trial simulation to compare proof-of-concept study designs for drugs with a slow onset of effect; an example in Alzheimer's disease. Lockwood P, Ewy W, Hermann D, Holford N. Pharm. Res. 2006 Sep; 23(9): 2050-2059 Abstract: OBJECTIVE: Clinical trial simulation (CTS) was used to select a robust design to test the hypothesis that a new treatment was effective for Alzheimer's disease (AD). Typically, a parallel group, placebo controlled, 12-week trial in 200-400 AD patients would be used to establish drug effect relative to placebo (i.e., Ho: Drug Effect = 0). We evaluated if a crossover design would allow smaller and shorter duration trials. MATERIALS AND METHODS: A family of plausible drug and disease models describing the time course of the AD assessment scale (ADAS-Cog) was developed based on Phase I data and literature reports of other treatments for AD. The models included pharmacokinetic, pharmacodynamic, disease progression, and placebo components. Eight alternative trial designs were explored via simulation. One hundred replicates of each combination of drug and disease model and trial design were simulated. A 'positive trial' reflecting drug activity was declared considering both a dose trend test (p < 0.05) and pair-wise comparisons to placebo (p < 0.025). RESULTS: A 4 x 4 Latin Square design was predicted to have at least 80% power to detect activity across a range of drug and disease models. The trial design was subsequently implemented and the trial was completed. Based on the results of the actual trial, a conclusive decision about further development was taken. The crossover design provided enhanced power over a parallel group design due to the lower residual variability. CONCLUSION: CTS aided the decision to use a more efficient proof of concept trial design, leading to savings of up to US 4 M dollars in direct costs and a firm decision 8-12 months earlier than a 12-week parallel group trial. This model is hosted on BioModels Database and identified by: BIOMD0000000673. To cite BioModels Database, please use: Chelliah V et al. BioModels: ten-year anniversary. Nucl. Acids Res. 2015, 43(Database issue):D542-8. 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:Background & Aims: New therapies for chronic hepatitis B (CHB) are urgently needed since current treatments rarely lead to cure. We evaluated whether the oral small molecule toll-like receptor (TLR7) agonist GS-9620 could induce durable anti-viral efficacy in woodchucks chronically infected with woodchuck hepatitis virus (WHV), a hepadnavirus closely related to human hepatitis B virus (HBV). Methods: After evaluating the pharmacokinetics, pharmacodynamics and tolerability of oral GS-9620 in uninfected woodchucks, adult woodchucks chronically infected with WHV (n=7 per group) were dosed with GS-9620 or placebo for 4 or 8 weeks with different treatment schedules. Results: GS?9620 treatment induced rapid, marked and sustained reduction in serum viral DNA (mean maximal 6.2 log10 reduction), and hepatic WHV DNA replicative intermediates, WHV cccDNA and WHV RNA, as well as loss of detectable serum WHV surface antigen (WHsAg). GS-9620 treatment also induced a sustained antibody response against WHsAg in a subset of animals. Strikingly, treatment reduced the incidence of hepatocellular carcinoma (HCC) from 71% in the placebo group to 8% in GS-9620-treated woodchucks with sustained viral load reduction. GS-9620 treatment was associated with reversible increases in serum liver enzymes and thrombocytopenia, and induced intrahepatic CD8+ T cell, NK cell, B cell and interferon (IFN) response transcriptional signatures. Conclusions: The data demonstrate that short duration, finite treatment with the oral TLR7 agonist GS-9620 can induce a sustained antiviral response in the woodchuck model of CHB, and support investigation of this compound as a therapeutic approach to attain a functional cure in CHB patients. Liver biopsies were taken at various time points pre-treatment, during treatment and post-treatment from placebo-treated group and GS9620-treated group (5mg/kg QW). Total RNAs were extracted and analyzed by RNA-Seq. The number of animals analyzed at each time-point for each group was as follows: group 1 (placebo) day -14, n=7; day 43, n=7; day 71, n=7; day 120, n=7; day 250, n=7; group 5 (5 mg/kg QW) day -14, n=7; day 23, n=6; day 57, n=5; day 78, n=4; day 250, n=5.

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Evaluation of the Efficacy of Xaliproden (SR57746A) in Preventing the Neurotoxicity of Oxaliplatin / 5FU/LV Chemotherapy.

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