Resveratrol and Quercetin Potentiate the Cell Protection and Rescue Effects of NAD <sup>+</sup> Precursors in HEK293 Cells Challenged by DNA Damaging Agent, <i>N</i> -Methyl- <i>N′</i> -nitro- <i>N</i> -nitrosoguanidine
Bibliographic record
Abstract
DNA damage plays an essential role in the human ageing process. Recently, accumulating evidence has demonstrated that a decreased level of nicotinamide adenine dinucleotide (NAD + ) is involved in human ageing and suggested that the natural supplements of NAD + precursors and its homeostasis regulators might serve as a promising modality to slow down the human ageing process. In the present study, we analyzed the combinational effects and potential mechanism of NAD + precursors, nicotinic acid (NA) and nicotinamide (NM), and the NAD + ’ homeostasis regulators, resveratrol (R), and quercetin (Q) in the protection and rescue of HEK293 cells from N-methyl- N'-nitro- N nitrosoguanidine (MNNG)-induced DNA damage. The results indicate that resveratrol and quercetin can significantly potentiate the cell protection and rescue effects of NAD + precursors in HEK293 cells attacked by the DNA damaging agent, MNNG. Intracellular NAD + homeostasis and the PARP1 activation status are the key factors in determining the fate of the cells under DNA damaging stress.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.002 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
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 teacher head, 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".