Loading…
Transcriptional profiling of apoptotic pathways in batch and fed-batch CHO cell cultures
Chinese Hamster ovary (CHO) cells are regarded as one of the “work‐horses” for complex biotherapeutics production. In these processes, loss in culture viability occurs primarily via apoptosis, a genetically controlled form of cellular suicide. Using our “in‐house” developed CHO cDNA array and a mous...
Saved in:
Published in: | Biotechnology and bioengineering 2006-06, Vol.94 (2), p.373-382 |
---|---|
Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | Chinese Hamster ovary (CHO) cells are regarded as one of the “work‐horses” for complex biotherapeutics production. In these processes, loss in culture viability occurs primarily via apoptosis, a genetically controlled form of cellular suicide. Using our “in‐house” developed CHO cDNA array and a mouse oligonucleotide array for time profile expression analysis of batch and fed‐batch CHO cell cultures, the genetic circuitry that regulates and executes apoptosis induction were examined. During periods of high viability, most pro‐apoptotic genes were down‐regulated but upon loss in viability, several early pro‐apoptotic signaling genes were up‐regulated. At later stages of viability loss, we detected late pro‐apoptotic effector genes such as caspases and DNases being up‐regulated. This sequential regulation of apoptotic genes showed that DNA microarrays could be used as a tool to study apoptosis. We found that in batch and fed‐batch cultures, apoptosis signaling occurred primarily via death receptor‐ and mitochondria‐mediated signaling pathways rather than endoplasmic reticulum‐mediated signaling. These insights provide a greater understanding of the regulatory circuitry of apoptosis during cell culture and allow for subsequent targeting of relevant apoptosis signaling genes to prolong cell culture. © 2006 Wiley Periodicals, Inc. |
---|---|
ISSN: | 0006-3592 1097-0290 |
DOI: | 10.1002/bit.20872 |