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Cell Rep ; 39(11): 110936, 2022 06 14.
Artigo em Inglês | MEDLINE | ID: mdl-35705050

RESUMO

Recombinant protein production can cause severe stress on cellular metabolism, resulting in limited titer and product quality. To investigate cellular and metabolic characteristics associated with these limitations, we compare HEK293 clones producing either erythropoietin (EPO) (secretory) or GFP (non-secretory) protein at different rates. Transcriptomic and functional analyses indicate significantly higher metabolism and oxidative phosphorylation in EPO producers compared with parental and GFP cells. In addition, ribosomal genes exhibit specific expression patterns depending on the recombinant protein and the production rate. In a clone displaying a dramatically increased EPO secretion, we detect higher gene expression related to negative regulation of endoplasmic reticulum (ER) stress, including upregulation of ATF6B, which aids EPO production in a subset of clones by overexpression or small interfering RNA (siRNA) knockdown. Our results offer potential target pathways and genes for further development of the secretory power in mammalian cell factories.


Assuntos
Estresse do Retículo Endoplasmático , Eritropoetina , Animais , Estresse do Retículo Endoplasmático/fisiologia , Eritropoetina/genética , Eritropoetina/metabolismo , Células HEK293/metabolismo , Humanos , Mamíferos/metabolismo , Transporte Proteico , Proteínas Recombinantes/metabolismo
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