ORIGINAL ARTICLE: Cell‐Surface CD200 May Predict Efficacy of Paternal Mononuclear Leukocyte Immunotherapy in Treatment of Human Recurrent Pregnancy Loss
Bibliographic record
Abstract
PROBLEM: The allogeneic leukocytes in transfused blood can modulate the recipient's immune system so as to induce TGF-beta-producing suppressor cells, and the cell-surface CD200 tolerance-signaling molecule on mononuclear dendritic cells is required for this effect. A subset of couples with unexplained recurrent pregnancy loss appears to benefit from transfusion of allogeneic paternal blood leukocytes (LIT), and considerable effort has been devoted to characterizing those who may benefit. Some data has been accumulated for LIT as sole therapy in patients with classical spontaneous abortions with respect to dose-response, duration of protection, need for boosting, excluding patients with autoimmunity, and inefficacy of paternal mononuclear cells stored at 4 degrees C overnight before use which causes loss of cell-surface CD200. Recent data emphasize an important role of expression of the CD200 tolerance-signaling molecule on cells used to prevent abortions both in mice and humans. METHOD OF STUDY: An observational study of outcome as a function of the number of CD200(+) paternal mononuclear cells was performed. Fourteen patients constituted the pilot group. Patients with autoimmunity who had failed inspite of treatment with IVIG + Heparin + Aspirin +/- Prednisone were allowed to have paternal mononuclear cells added to their therapy. CD200 on purified paternal blood mononuclear cells was measured by flow cytometry. RESULTS: The number of CD200(+) cells administered was significantly greater in women achieving pregnancy (39.2 x 10(6) versus 20.8 x 10(6), P < 0.025) and in those who achieved a live birth (50.2 x 10(6) versus 20.8 x 10(6), P < 0.005) compared to those who did not achieve pregnancy, and % of paternal cells that were CD200(+) was greater (11-12.5% versus 5.6%, P < 0.01). Amongst those achieving pregnancy which failed, the CD200(+) cell dose was not significantly different from the non-pregnant group (30.5 x 10(6) versus 20.8 x 10(6)). CONCLUSION: The number of CD200(+) paternal mononuclear leukocytes may be an important determinant of subsequent reproductive outcome in a subset of patients. A lower % CD200(+) cell number may also reflect hitherto unappreciated paternal factors bearing on reproductive success. It is feasible to recruit women to enter observational studies and to obtain useful data as a foundation for further studies. More complete patient characterization in a larger study is needed.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.002 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.002 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".