4ZVV image
Entry Detail
PDB ID:
4ZVV
Title:
Lactate dehydrogenase A in complex with a trisubstituted piperidine-2,4-dione inhibitor GNE-140
Biological Source:
Source Organism:
Host Organism:
PDB Version:
Deposition Date:
2015-05-18
Release Date:
2016-05-18
Method Details:
Experimental Method:
Resolution:
2.20 Å
R-Value Free:
0.25
R-Value Work:
0.23
R-Value Observed:
0.23
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:L-lactate dehydrogenase A chain
Chain IDs:A, B, C, D
Chain Length:332
Number of Molecules:4
Biological Source:Homo sapiens
Primary Citation

Abstact

Metabolic reprogramming in tumors represents a potential therapeutic target. Herein we used shRNA depletion and a novel lactate dehydrogenase (LDHA) inhibitor, GNE-140, to probe the role of LDHA in tumor growth in vitro and in vivo. In MIA PaCa-2 human pancreatic cells, LDHA inhibition rapidly affected global metabolism, although cell death only occurred after 2 d of continuous LDHA inhibition. Pancreatic cell lines that utilize oxidative phosphorylation (OXPHOS) rather than glycolysis were inherently resistant to GNE-140, but could be resensitized to GNE-140 with the OXPHOS inhibitor phenformin. Acquired resistance to GNE-140 was driven by activation of the AMPK-mTOR-S6K signaling pathway, which led to increased OXPHOS, and inhibitors targeting this pathway could prevent resistance. Thus, combining an LDHA inhibitor with compounds targeting the mitochondrial or AMPK-S6K signaling axis may not only broaden the clinical utility of LDHA inhibitors beyond glycolytically dependent tumors but also reduce the emergence of resistance to LDHA inhibition.

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Primary Citation of related structures