ORIGINAL ARTICLE: Prevention of Spontaneous Abortion in the CBA × DBA/2 Mouse Model by Intravaginal TGF‐β and Local Recruitment of CD4<sup>+ </sup>8<sup>+</sup> FOXP3<sup>+</sup> Cells
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
PROBLEM: Activation of latent transforming growth factor (TGF)-beta in seminal plasma has been suggested by Robertson et al. to promote maternal tolerance to paternal antigens. A possible consequence reported by Tremellen et al. is increased pregnancy rates in women undergoing IVF. A decreased spontaneous abortion rate has also been postulated. Seminal plasma contains many factors besides TGF-beta, and a critical test of the hypothesis was required. The purpose of the present study was to directly test the effect of pure TGF-beta. METHOD OF STUDY: Pharmaceutical grade bioactive TGF-beta3 with a bovine serum albumin (BSA) carrier 0.1-1% in phosphate-buffered saline (PBS) was given into the vaginal tract of CBA/J female mice at the time of mating with DBA/2 males. One microgram Salmonella enteritidis lipopolysaccharide was given intraperitoneally to augment occult losses and spontaneous resorptions assessed on day 13.5 of pregnancy. The effect of TGF-beta3 on recruitment of lymphomyeloid cells to the vaginal wall and vaginal lumen of unmated mice in estrus was assessed using immunohistochemistry and flow cytometry. RESULTS: Two nanogram of intravaginal TGF-beta3 in 0.1% BSA-PBS or 20 ng in 1% BSA-PBS reduced abortion rates. Protection was comparable to that achieved by immunization with BALB/c spleen cells. Fraction V BSA, a binder of TGF-betas, had some activity, and could reduce availability of added TGF-beta3. CD11c dendritic cells, CD3+ T cells, and CD25+ cells were recruited to the vaginal wall by 48 hr after TGF-beta3 treatment, and cellularity of vaginal exudates increased. Foxp3+ cells were present in increased numbers, and appeared to be CD8+ and CD4+ 8+. Semen, but not TGF-beta3, stimulated a physiological polymorphonuclear leukocyte exudate. CONCLUSION: Intravaginal bioactive TGF-beta3 can enhance success of pregnancy in vivo in an established model of abortion. The result could be explained by the independent ability of TGF-beta to promote a regulatory T-cell response.
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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 | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.004 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 it