Pancreatic ductal adenocarcinoma (PDAC) is one of the tumors with greater invasiveness and metastasis. PDAC is associated with a large desmoplastic reaction, characterized by fibroblastic proliferation and extracellular matrix secretion. Besides, cellular bioenergetics has become a central issue of investigation in cancer biology, because the altered energy metabolism of cancer cells has been proposed as a potential target for cancer treatment. We have established co-cultures between PDAC cell lines (Capan-1 or PL-45) and fibroblasts (LC5). A reverse phase protein microarray (RPMA) approach has been applied to quantify proteins of energy metabolism in theses co-cultures, with the aim of identifying potential biomarkers in PDACs. The fifteen proteins of energy metabolism studied included members of the mitochondrial oxidation of pyruvate, the tricarboxylic acid cycle, β-oxidation of fatty acids, electron transport and oxidative phosphorylation, glycogen metabolism, glycolysis and oxidative stress using highly specific antibodies. Co-cultures modified proteins expression of energy metabolism, respect to monocultures. Capan-1 in co-culture increased several proteins belonging to OXPHOS (NDUFS3, SDHB, CORE2 and COXII), the antioxidant SOD2, the mitochondrial HSP60, and G6PDH. The expression of the glycolitic PKM2 decreased. Their fibroblasts partners increased the expression of SDHB and also decreased PKM2. PL-45 in co-culture, experimented an increase in HADHA. Their fibroblasts partners showed a decrease in PKM2, LDHA, IF1, PDHe and HSP60.Capann-1 and PL-45 in co-culture with fibroblast, differ en their energy metabolism phenotype. Overall, the results indicate that the quantification of bioenergetic signature offers potential biomarkers that could be implemented to refine the understanding of the biological principles of PDAC and, eventually, the management of patients with these tumors.

Citation Format: Mª Teresa Agulló-Ortuño, Elena Prieto-García, C. Vanesa Díaz-García, Irene Otero Blas, Inmaculada García-Ruíz, José A. López-Martín. Bioenergetic signature from cocultures of pancreatic tumor cell lines and fibroblasts [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2017; 2017 Apr 1-5; Washington, DC. Philadelphia (PA): AACR; Cancer Res 2017;77(13 Suppl):Abstract nr 5893. doi:10.1158/1538-7445.AM2017-5893