Overexpression of G6PDH does not affect the behavior of HEK-293 clones stably expressing interferon-α2b
Bibliographic record
Abstract
HEK293 cells are gaining in interest for the production of recombinant proteins. However, further understanding and engineering of cell metabolism are still needed to improve protein titers. The importance of G6PDH has already been studied regarding redox balance, and a correlation has recently been established between the oxidative pentose phosphate pathway (PPP) and antibody peak production. In this work, HEK293 cells stably expressing interferon-α2b, a parental clone, and a further engineered clone expressing the cytosolic yeast pyruvate-carboxylase (PYC) were transiently transfected to overexpress glucose-6-phosphate dehydrogenase (G6PDH) and increase fluxes through the PPP. The aim of the study was thus to evaluate the effect of overexpressing G6PDH on the “pull” effect brought by the PYC phenotype. Results indicate that the cell metabolism is, however, highly robust, showing a highly regulated PPP damping the potential effects of overexpressing G6PDH. A metabolomic study also clearly demonstrates, by metabolites profiling, that the PYC clone has a highly robust and more efficient metabolic efficiency, compared to its parental clone.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".