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Effect of Akt overexpression on programmed cell death in antibody-producing Chinese hamster ovary cells

Paper ID Volume ID Publish Year Pages File Format Full-Text
24761 43535 2009 6 PDF Available
Title
Effect of Akt overexpression on programmed cell death in antibody-producing Chinese hamster ovary cells
Abstract

Upon nutrient deprivation, Chinese hamster ovary (CHO) cells are subjected to two types of programmed cell death, apoptosis and autophagy. CHO cell engineering, as a means to improve foreign protein production, has focused mainly on anti-apoptosis. In this study, to determine the effect of Akt, which is known to regulate both apoptosis and autophagy, on cell survival and foreign protein production, constitutively active Akt was overexpressed in antibody-producing cells. Compared with the control cells, Akt overexpressing cells showed delayed onset of apoptosis and autophagy during batch culture. The inhibition of apoptosis was demonstrated by reduced amount of cleaved poly(ADP-ribose) polymerase and caspase 3 proteins and less fragmentation of chromosomal DNA. Moreover, under nutrient-limiting conditions, decreased level of autophagosome accumulation was observed in Akt overexpressing cells by the less accumulation of the 16 kDa form of LC3-II and autophagic vacuoles. Taken together, the overexpression of constitutively active Akt in CHO cells could delay the onset of both types of programmed cell death during batch culture.

Keywords
Akt; Apoptosis; Autophagy; Chinese hamster ovary cells; Programmed cell death
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Effect of Akt overexpression on programmed cell death in antibody-producing Chinese hamster ovary cells
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Biotechnology - Volume 139, Issue 1, 1 January 2009, Pages 89–94
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us