Publication Type(s): Journal Article
Author(s): Dalgleish, Angus G; Stebbing, Justin; Adamson, Douglas Ja; Arif, Seema Safia; Bidoli, Paolo; Chang, David; Cheeseman, Sue; Diaz-Beveridge, Robert; Fernandez-Martos, Carlos; Glynne-Jones, Rob; Granetto, Cristina; Massuti, Bartomeu; McAdam, Karen; McDermott, Raymond; Martín, Andrés J Muñoz; Papamichael, Demetris; Pazo-Cid, Roberto; Vieitez, Jose M; Zaniboni, Alberto; Carroll, Kevin J; Wagle, Shama; Gaya, Andrew; Mudan, Satvinder S
Abstract:Immune Modulation and Gemcitabine Evaluation-1, a randomised, open-label, phase II, first-line, proof of concept study (NCT01303172), explored safety and tolerability of IMM-101 (heat-killed Mycobacterium obuense; NCTC 13365) with gemcitabine (GEM) in advanced pancreatic ductal adenocarcinoma. Patients were randomised (2 : 1) to IMM-101 (10 mg ml(-l) intradermally)+GEM (1000 mg m(-2) intravenously; n=75), or GEM alone (n=35). Safety was assessed on frequency and incidence of adverse events (AEs). Overall survival (OS), progression-free survival (PFS) and overall response rate (ORR) were collected. IMM-101 was well tolerated with a similar rate of AE and serious adverse event reporting in both groups after allowance for exposure. Median OS in the intent-to-treat population was 6.7 months for IMM-101+GEM v 5.6 months for GEM; while not significant, the hazard ratio (HR) numerically favoured IMM-101+GEM (HR, 0.68 (95% CI, 0.44-1.04, P=0.074). In a pre-defined metastatic subgroup (84%), OS was significantly improved from 4.4 to 7.0 months in favour of IMM-101+GEM (HR, 0.54, 95% CI 0.33-0.87, P=0.01). IMM-101 with GEM was as safe and well tolerated as GEM alone, and there was a suggestion of a beneficial effect on survival in patients with metastatic disease. This warrants further evaluation in an adequately powered confirmatory study.