Autocrine, paracrine and necrotic NMDA receptor signalling in mouse pancreatic neuroendocrine tumour cells.
The Royal Society
MetadataShow full item record
Robinson, H., & Li, L. (2017). Autocrine, paracrine and necrotic NMDA receptor signalling in mouse pancreatic neuroendocrine tumour cells.. Open Biol, 7 (12) https://doi.org/10.1098/rsob.170221
N-Methyl-d-aspartate receptor (NMDAR) activation is implicated in the malignant progression of many cancer types, as previously shown by the growth-inhibitory effects of NMDAR antagonists. NMDAR-mediated calcium influx and its downstream signalling depend critically, however, on the dynamics of membrane potential and ambient glutamate concentration, which are poorly characterized in cancer cells. Here, we have used low-noise whole-cell patch-clamp recording to investigate the electrophysiology of glutamate signalling in pancreatic neuroendocrine tumour (PanNET) cells derived from a genetically-engineered mouse model (GEMM) of PanNET, in which NMDAR signalling is known to promote cancer progression. Activating NMDARs caused excitation and intracellular calcium elevation, and intracellular perfusion with physiological levels of glutamate led to VGLUT-dependent autocrine NMDAR activation. Necrotic cells, which are often present in rapidly-growing tumours, were shown to release endogenous cytoplasmic glutamate, and necrosis induced by mechanical rupture of the plasma membrane produced intense NMDAR activation in nearby cells. Computational modelling, based on these results, predicts that NMDARs in cancer cells can be strongly activated in the tumour microenvironment by both autocrine glutamate release and necrosis.
Cell Line, Animals, Mice, Inbred C57BL, Mice, Neuroendocrine Tumors, Pancreatic Neoplasms, Necrosis, Glutamic Acid, Receptors, N-Methyl-D-Aspartate, Autocrine Communication, Paracrine Communication, Calcium Signaling, Action Potentials
Embargo Lift Date
External DOI: https://doi.org/10.1098/rsob.170221
This record's URL: https://www.repository.cam.ac.uk/handle/1810/273236
Attribution 4.0 International
Licence URL: http://creativecommons.org/licenses/by/4.0/
Recommended or similar items
The following licence files are associated with this item: