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372) mRNA profiles of all major ER chaperones and unfolded protein response (UPR) pathway genes are measured at a series of time points in a high-producing cell line under the dynamic environment of a batch culture.
* Dynamics of unfolded protein response in recombinant CHO cells.
- Genes in the protein secretion pathway have been targeted to increase productivity of monoclonal antibodies in Chinese hamster ovary cells. The results have been highly variable depending on the cell type and the relative amount of recombinant and target proteins. This paper presents a comprehensive study encompassing major components of the protein processing pathway in the endoplasmic reticulum (ER) to elucidate its role in recombinant cells. mRNA profiles of all major ER chaperones and unfolded protein response (UPR) pathway genes are measured at a series of time points in a high-producing cell line under the dynamic environment of a batch culture. An initial increase in IgG heavy chain mRNA levels correlates with an increase in productivity. We observe a parallel increase in the expression levels of majority of chaperones. The chaperone levels continue to increase until the end of the batch culture. In contrast, calreticulin and ERO1-L alpha, two of the lowest expressed genes exhibit transient time profiles, with peak induction on day 3. In response to increased ER stress, both the GCN2/PKR-like ER kinase and inositol-requiring enzyme-1alpha (Ire1α) signalling branch of the UPR are upregulated. Interestingly, spliced X-Box binding protein 1 (XBP1s) transcription factor from Ire1α pathway is detected from the beginning of the batch culture. Comparison with the expression levels in a low producer, show much lower induction at the end of the exponential growth phase. Thus, the unfolded protein response strongly correlates with the magnitude and timing of stress in the course of the batch culture.
=>反応, 応答, 返答, 返報, 反響, 答唱句
Overview of noun response
The noun response has 7 senses (first 5 from tagged texts)
1. (11) response -- (a result; "this situation developed in response to events in Africa")
2. (11) reaction, response -- (a bodily process occurring due to the effect of some antecedent
stimulus or agent; "a bad reaction to the medicine"; "his responses have slowed with age")
3. (6) answer, reply, response -- (a statement (either spoken or written) that is made to reply to a
question or request or criticism or accusation; "I waited several days for his answer"; "he wrote
replies to several of his critics")
4. (4) reception, response -- (the manner in which something is greeted; "she did not expect the
cold reception she received from her superiors")
5. (1) response -- (a phrase recited or sung by the congregation following a versicle by the priest
or minister)
6. reply, response -- (the speech act of continuing a conversational exchange; "he growled his
reply")
7. response -- (the manner in which an electrical or mechanical device responds to an input signal
or a range of input signals)
--- WordNet end ---