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Apilimod enhances specific productivity in recombinant CHO cells through cell cycle arrest and mediation of autophagy

Chinese hamster ovary (CHO) cells are expected to acquire the ability to produce higher recombinant therapeutic protein levels using various strategies. Genetic engineering targeting the cell cycle and autophagy pathways in the regulation of cell death in CHO cell cultures has received attention for enhancing the production of therapeutic proteins. In this study, we examined the small-molecule compound apilimod, which was found to have a positive influence on recombinant protein expression in CHO cells. This was confirmed by selective blocking of the cell cycle at the G0/G1 phase. Apilimod treatment resulted in decreased expression of Cyclin-dependent kinase 3 (CDK3) and Cyclin C and increased expression of Cyclin-dependent kinase suppressor p27Kip1, which are critical regulators of G1 cell cycle progression and important targets controlling cell proliferation. Furthermore, total transcription factor EB (TFEB) was lower in apilimod-treated CHO cells than in control cells, resulting in decreased lysosome biogenesis and autophagy with apilimod treatment. These multiple effects demonstrate the potential of apilimod for development as a novel enhancer for the production of recombinant proteins in CHO cell engineering. This article is protected by copyright. All rights reserved.

Related Products

Cat.No. Product Name Information
S0785 Apilimod mesylate Apilimod mesylate is a potent and orally-available inhibitor of the cytokines interleukin-12 (IL-12) and interleukin-23 (IL-23) with the potential to treat certain autoimmune and inflammatory diseases. Apilimod mesylate (STA-5326 mesylate) inhibits IL-12 with IC50 of 1 nM, 1 nM and 2 nM, in IFN-γ/SAC-stimulated human PBMCs, human monocytes and mouse PBMCs, respectively. Apilimod mesylate (STA-5326 mesylate) is also a cell permeable small molecule that specifically inhibits PIKfyve with IC50 of 14 nM.

Related Targets

Interleukins PIKfyve