Chemical Inhibition of Autophagy: Examining Its Potential to Increase the Specific Productivity of Recombinant CHO Cell Lines

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dc.contributor.authorBaek, Eric Hko
dc.contributor.authorKim, Che Linko
dc.contributor.authorKim, Mi Gyeomko
dc.contributor.authorLee, Jae Seongko
dc.contributor.authorLee, Gyun Minko
dc.date.accessioned2016-11-09T08:26:06Z-
dc.date.available2016-11-09T08:26:06Z-
dc.date.created2016-10-31-
dc.date.created2016-10-31-
dc.date.issued2016-09-
dc.identifier.citationBIOTECHNOLOGY AND BIOENGINEERING, v.113, no.9, pp.1953 - 1961-
dc.identifier.issn0006-3592-
dc.identifier.urihttp://hdl.handle.net/10203/213996-
dc.description.abstractChinese hamster ovary (CHO) cells activate and undergo apoptosis and autophagy for various environmental stresses. Unlike apoptosis, studies on increasing the production of therapeutic proteins in CHO cells by targeting the autophagy pathway are limited. In order to identify the effects of chemical autophagy inhibitors on the specific productivity (q(p)), nine chemical inhibitors that had been reported to target three different phases of autophagy (metformin, dorsomorphin, resveratrol, and SP600125 against initiation and nucleation; 3-MA, wortmannin, and LY294002 against elongation, and chloroquine and bafilomycin A1 against autophagosome fusion) were used to treat three recombinant CHO (rCHO) cell lines: the Fc-fusion protein-producing DG44 (DG44-Fc) and DUKX-B11 (DUKX-Fc) and antibody-producing DG44 (DG44-Ab) cell lines. Among the nine chemical inhibitors tested, 3-MA, dorsomorphin, and SP600125 significantly increased the q(p) of DG44-Fc and DUKX-Fc. In contrast, for DG44-Ab, only 3-MA significantly increased the q(p). The autophagy-inhibiting activity of the nine chemical inhibitors on the rCHO cell lines was evaluated through Western blot analysis and flow cytometry. Unexpectedly, some chemical inhibitors did not exhibit any apparent inhibition activity on autophagy. The chemical inhibitors that enhanced the q(p), 3-MA, dorsomorphin, and SP600125, exhibited instead an increased autophagic flux. Taken all together, the chemical inhibition of autophagy was not effective in increasing the q(p) in rCHO cell lines and the positive effect of 3-MA, dorsomorphin, and SP600125 on the qp was not due to the inhibition of autophagy. (C) 2016 Wiley Periodicals, Inc-
dc.languageEnglish-
dc.publisherWILEY-BLACKWELL-
dc.subjectHAMSTER OVARY CELLS-
dc.subjectACTIVATED PROTEIN-KINASE-
dc.subjectISOLATED RAT HEPATOCYTES-
dc.subjectSIGNALING PATHWAYS-
dc.subjectMAMMALIAN-CELLS-
dc.subjectSODIUM-BUTYRATE-
dc.subjectS6 KINASE-
dc.subjectAPOPTOSIS-
dc.subjectCULTURE-
dc.subjectDEATH-
dc.titleChemical Inhibition of Autophagy: Examining Its Potential to Increase the Specific Productivity of Recombinant CHO Cell Lines-
dc.typeArticle-
dc.identifier.wosid000384751500012-
dc.identifier.scopusid2-s2.0-84979789866-
dc.type.rimsART-
dc.citation.volume113-
dc.citation.issue9-
dc.citation.beginningpage1953-
dc.citation.endingpage1961-
dc.citation.publicationnameBIOTECHNOLOGY AND BIOENGINEERING-
dc.identifier.doi10.1002/bit.25962-
dc.contributor.localauthorLee, Gyun Min-
dc.contributor.nonIdAuthorLee, Jae Seong-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorautophagy-
dc.subject.keywordAuthorautophagic flux-
dc.subject.keywordAuthorchemical autophagy inhibitor-
dc.subject.keywordAuthorCHO cells-
dc.subject.keywordAuthorspecific productivity-
dc.subject.keywordAuthortherapeutic protein-
dc.subject.keywordPlusHAMSTER OVARY CELLS-
dc.subject.keywordPlusACTIVATED PROTEIN-KINASE-
dc.subject.keywordPlusISOLATED RAT HEPATOCYTES-
dc.subject.keywordPlusSIGNALING PATHWAYS-
dc.subject.keywordPlusMAMMALIAN-CELLS-
dc.subject.keywordPlusSODIUM-BUTYRATE-
dc.subject.keywordPlusS6 KINASE-
dc.subject.keywordPlusAPOPTOSIS-
dc.subject.keywordPlusCULTURE-
dc.subject.keywordPlusDEATH-
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