??-Defensins Released Into Stimulated CD8+ T-Cell Supernatants Are Likely Derived From Residual Granulocytes Within the Irradiated Allogeneic Peripheral Blood Mononuclear Cells Used as Feeders
Bibliographic record
Abstract
We recently demonstrated the ability of human beta-defensins to inhibit HIV-1 replication in vitro and demonstrated that alpha-defensins account for the great majority of beta-chemokine independent antiretroviral activity in stimulated CD8+ T-cell culture supernatants. In a follow-up study aimed at defining specific subpopulations of CD8+ T-cells that produce alpha-defensins, we have found that in the absence of irradiated allogeneic peripheral blood mononuclear cells (PBMC), stimulated CD8+ T-cell supernatants do not contain alpha-defensins. In our present work, we define residual granulocytes within PBMC fractions as the likely source. In addition, we describe in vitro conditions that promote the internalization of alpha-defensins by cells not natively producing these proteins, thus confounding our ability to define true alpha-defensin producer cells. In light of these findings, alpha-defensins released into stimulated CD8+ T-cell supernatants are unlikely to be derived from the CD8+ T-cells themselves. Moreover, our data imply that under some experimental conditions, a soluble noncytolytic anti-HIV-1 factor other than beta-chemokines is either not produced by CD8+ T-cells or is present in too small quantity to be effective.
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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 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".