Lysyl oxidase family activity promotes resistance of pancreatic ductal adenocarcinoma to chemotherapy by limiting the intratumoral anticancer drug distribution

Benjamin Le Calvé, Audrey Griveau, David Vindrieux, Raphaël Maréchal, Clotilde Wiel, Magali Svrcek, Johann Gout, Lamia Azzi, Léa Payen, Jérôme Cros, Christelle de la Fouchardière, Pierre Dubus, Jérôme Guitton, Laurent Bartholin, Jean-Baptiste Bachet, David Bernard

Résultats de recherche: Contribution à un journal/une revueArticleRevue par des pairs

Résumé

Solid tumors often display chemotherapy resistance. Pancreatic ductal adenocarcinoma (PDAC) is the archetype of resistant tumors as current chemotherapies are inefficient. The tumor stroma and extracellular matrix (ECM) are key contributors to PDAC aggressiveness and to limiting the efficacy of chemotherapy. Lysyl oxidase (LOX) family members mediate collagen cross-linking and thus promote ECM stiffening. Our data demonstrate increased LOX, LOXL1, and LOXL2 expression in PDAC, and that the level of fibrillar collagen, which is directly dependent of LOX family activity, is an independent predictive biomarker of adjuvant "Gemcitabine-based chemotherapy" benefit. Experimentally in mice, increased LOX family activity through LOXL2 promotes chemoresistance. This effect of LOX family activity seems to be due to decreased gemcitabine intra-tumoral diffusion. This observation might be explained by increased fibrillar collagen and decreased vessel size observed in tumors with increased LOX family activity. In conclusion, our data support that LOX family activity is both a novel target to improve chemotherapy as well as a novel biomarker to predict gemcitabine benefit in PDAC. Beyond the PDAC, it is possible that targeting LOX family activity might improve efficacy of chemotherapies against different kinds of solid tumors.

langue originaleAnglais
Pages (de - à)32100-12
Nombre de pages13
journalOncotarget
Volume7
Numéro de publication22
Les DOIs
Etat de la publicationPublié - 2016
Modification externeOui

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