T Cells of Patients with Myelodysplastic Syndrome Are Frequently Derived From the Malignant Clone
Bibliographic record
Abstract
Abstract Abstract 2808 T cell clonality is a common finding in myelodysplastic syndromes (MDS), but is believed to be a reactive phenomenon. We compared copy number abnormalities in matched CD34+ progenitor cells and CD3+ T cells from 40 MDS patients by array comparative genomic hybridization. In 9 of 14 patients with large copy number variants, we detected the same aberration in CD34+ and CD3+ cells. Chromosome 20q (2 patients), isodicentric × chromosome (2 patients), trisomy 8 (2 patients), 11q abnormalities (1 patient), deletion 5q (1 patient) and partial trisomy 9 with trisomies 19 and 22 (1 patient) were detected in the CD34+ and CD3+ cells of these patients. The presence of deletion 20q, trisomy 8 and deletion of chromosome arm 11q in the T cells of 3 patients was confirmed by FISH. Multiplex PCR for TCR γ rearrangement was performed on 6 of the 14 MDS patients with large copy number variants. T cell clonality was detected in 3 of 4 and oligoclonality in 1 of 4 patients when the copy number variant was present in both CD34+ and CD3+ cells. In contrast, the 2 cases lacking the CD34+ copy number variant in the CD3+ population were polyclonal at the TCR γ locus. These data suggest that in a large proportion of MDS at least a proportion of the T cells are part of the malignant clone, and that CD3+ cells do not represent an appropriate patient normal control for genome-wide studies. Disclosures: No relevant conflicts of interest to declare.
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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 | 0.001 |
| 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) | 0.002 | 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 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".