Lurbinectedin induces depletion of tumor-associated macrophages, an essential component of its in vivo synergism with gemcitabine, in pancreatic adenocarcinoma mouse models
Por:
Cespedes, MV, Guillen, MJ, Lopez-Casas, PP, Sarno, F, Gallardo, A, Alamo, P, Cuevas, C, Hidalgo, M, Galmarini, CM, Allavena, P, Aviles, P, Mangues, R
Publicada:
1 dic 2016
Resumen:
We explored whether the combination of lurbinectedin (PM01183) with the antimetabolite gemcitabine could result in a synergistic antitumor effect in pancreatic ductal adenocarcinoma (PDA) mouse models. We also studied the contribution of lurbinectedin to this synergism. This drug presents a dual pharmacological effect that contributes to its in vivo antitumor activity: (i) specific binding to DNA minor grooves, inhibiting active transcription and DNA repair; and (ii) specific depletion of tumor-associated macrophages (TAMs). We evaluated the in vivo antitumor activity of lurbinectedin and gemcitabine as single agents and in combination in SW-1990 and MIA PaCa-2 cell-line xenografts and in patient-derived PDA models (AVATAR). Lurbinectedin-gemcitabine combination induced a synergistic effect on both MIA PaCa-2 [combination index (CI)=0.66] and SW-1990 (CI=0.80) tumor xenografts. It also induced complete tumor remissions in four out of six patient-derived PDA xenografts. This synergism was associated with enhanced DNA damage (anti-gamma-H2AX), cell cycle blockage, caspase-3 activation and apoptosis. In addition to the enhanced DNA damage, which is a consequence of the interaction of the two drugs with the DNA, lurbinectedin induced TAM depletion leading to cytidine deaminase (CDA) downregulation in PDA tumors. This effect could, in turn, induce an increase of gemcitabine-mediated DNA damage that was especially relevant in high-density TAM tumors. These results show that lurbinectedin can be used to develop 'molecularly targeted' combination strategies.
Filiaciones:
Cespedes, MV:
Hosp Santa Creu & Sant Pau, CIBER BBN, Inst Invest Biomed St Pau, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
Hosp Santa Creu & Sant Pau, Josep Carreras Res Inst, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
Guillen, MJ:
PharmaMar SA, Dept Res & Dev R&D, Ave los Reyes 1, Madrid 28770, Spain
Lopez-Casas, PP:
CNIO, Calle Melchor Fernandez Almagro 3, Madrid 28029, Spain
Sarno, F:
CNIO, Calle Melchor Fernandez Almagro 3, Madrid 28029, Spain
Gallardo, A:
Hosp Santa Creu & Sant Pau, CIBER BBN, Inst Invest Biomed St Pau, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
Hosp Santa Creu & Sant Pau, Josep Carreras Res Inst, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
Alamo, P:
Hosp Santa Creu & Sant Pau, CIBER BBN, Inst Invest Biomed St Pau, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
Hosp Santa Creu & Sant Pau, Josep Carreras Res Inst, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
Cuevas, C:
PharmaMar SA, Dept Res & Dev R&D, Ave los Reyes 1, Madrid 28770, Spain
Hidalgo, M:
CNIO, Calle Melchor Fernandez Almagro 3, Madrid 28029, Spain
Galmarini, CM:
PharmaMar SA, Dept Res & Dev R&D, Ave los Reyes 1, Madrid 28770, Spain
Allavena, P:
IRCCS Ist Clin Humanitas, Via Manzoni 56, I-20089 Milan, Italy
Aviles, P:
PharmaMar SA, Dept Res & Dev R&D, Ave los Reyes 1, Madrid 28770, Spain
Mangues, R:
Hosp Santa Creu & Sant Pau, CIBER BBN, Inst Invest Biomed St Pau, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
Hosp Santa Creu & Sant Pau, Josep Carreras Res Inst, Ave Sant Antoni M Claret 167, Barcelona 08025, Spain
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